src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_TEXTCTRL && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/textctrl.h"
  31     #include "wx/settings.h"
  32     #include "wx/brush.h"
  33     #include "wx/utils.h"
  34     #include "wx/intl.h"
  35     #include "wx/log.h"
  36     #include "wx/app.h"
  37     #include "wx/menu.h"
  38     #include "wx/math.h"
  39     #include "wx/module.h"
  40     #include "wx/wxcrtvararg.h"
  41 #endif
  42
  43 #include "wx/sysopt.h"
  44
  45 #if wxUSE_CLIPBOARD
  46     #include "wx/clipbrd.h"
  47 #endif
  48
  49 #include "wx/textfile.h"
  50
  51 #include <windowsx.h>
  52
  53 #include "wx/msw/private.h"
  54 #include "wx/msw/winundef.h"
  55 #include "wx/msw/mslu.h"
  56
  57 #include <string.h>
  58 #include <stdlib.h>
  59
  60 #ifndef __WXWINCE__
  61 #include <sys/types.h>
  62 #endif
  63
  64 #if wxUSE_RICHEDIT
  65
  66 #if wxUSE_INKEDIT
  67 #include "wx/dynlib.h"
  68 #endif
  69
  70 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  71 // richedit.h at all
  72 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  73     #include <richedit.h>
  74 #endif
  75
  76 #endif // wxUSE_RICHEDIT
  77
  78 #include "wx/msw/missing.h"
  79
  80 #if wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
  81
  82 // dummy value used for m_dropTarget, different from any valid pointer value
  83 // (which are all even under Windows) and NULL
  84 static wxDropTarget *
  85     wxRICHTEXT_DEFAULT_DROPTARGET = reinterpret_cast<wxDropTarget *>(1);
  86
  87 #endif // wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
  88
  89 // ----------------------------------------------------------------------------
  90 // private classes
  91 // ----------------------------------------------------------------------------
  92
  93 #if wxUSE_RICHEDIT
  94
  95 // this module initializes RichEdit DLL(s) if needed
  96 class wxRichEditModule : public wxModule
  97 {
  98 public:
  99     enum Version
 100     {
 101         Version_1,          // riched32.dll
 102         Version_2or3,       // both use riched20.dll
 103         Version_41,         // msftedit.dll (XP SP1 and Windows 2003)
 104         Version_Max
 105     };
 106
 107     virtual bool OnInit();
 108     virtual void OnExit();
 109
 110     // load the richedit DLL for the specified version of rich edit
 111     static bool Load(Version version);
 112
 113 #if wxUSE_INKEDIT
 114     // load the InkEdit library
 115     static bool LoadInkEdit();
 116 #endif
 117
 118 private:
 119     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 120     static HINSTANCE ms_hRichEdit[Version_Max];
 121
 122 #if wxUSE_INKEDIT
 123     static wxDynamicLibrary ms_inkEditLib;
 124     static bool             ms_inkEditLibLoadAttemped;
 125 #endif
 126
 127     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 128 };
 129
 130 HINSTANCE wxRichEditModule::ms_hRichEdit[Version_Max] = { NULL, NULL, NULL };
 131
 132 #if wxUSE_INKEDIT
 133 wxDynamicLibrary wxRichEditModule::ms_inkEditLib;
 134 bool             wxRichEditModule::ms_inkEditLibLoadAttemped = false;
 135 #endif
 136
 137 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 138
 139 #endif // wxUSE_RICHEDIT
 140
 141 // a small class used to set m_updatesCount to 0 (to filter duplicate events if
 142 // necessary) and to reset it back to -1 afterwards
 143 class UpdatesCountFilter
 144 {
 145 public:
 146     UpdatesCountFilter(int& count)
 147         : m_count(count)
 148     {
 149         wxASSERT_MSG( m_count == -1 || m_count == -2,
 150                       wxT("wrong initial m_updatesCount value") );
 151
 152         if (m_count != -2)
 153             m_count = 0;
 154         //else: we don't want to count how many update events we get as we're going
 155         //      to ignore all of them
 156     }
 157
 158     ~UpdatesCountFilter()
 159     {
 160         m_count = -1;
 161     }
 162
 163     // return true if an event has been received
 164     bool GotUpdate() const
 165     {
 166         return m_count == 1;
 167     }
 168
 169 private:
 170     int& m_count;
 171
 172     wxDECLARE_NO_COPY_CLASS(UpdatesCountFilter);
 173 };
 174
 175 // ----------------------------------------------------------------------------
 176 // event tables and other macros
 177 // ----------------------------------------------------------------------------
 178
 179 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 180     EVT_CHAR(wxTextCtrl::OnChar)
 181     EVT_KEY_DOWN(wxTextCtrl::OnKeyDown)
 182     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 183
 184 #if wxUSE_RICHEDIT
 185     EVT_CONTEXT_MENU(wxTextCtrl::OnContextMenu)
 186 #endif
 187
 188     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 189     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 190     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 191     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 192     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 193     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 194     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 195
 196     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 197     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 198     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 199     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 200     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 201     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 202     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 203
 204     EVT_SET_FOCUS(wxTextCtrl::OnSetFocus)
 205 END_EVENT_TABLE()
 206
 207 // ============================================================================
 208 // implementation
 209 // ============================================================================
 210
 211 // ----------------------------------------------------------------------------
 212 // creation
 213 // ----------------------------------------------------------------------------
 214
 215 void wxTextCtrl::Init()
 216 {
 217 #if wxUSE_RICHEDIT
 218     m_verRichEdit = 0;
 219 #endif // wxUSE_RICHEDIT
 220
 221 #if wxUSE_INKEDIT && wxUSE_RICHEDIT
 222     m_isInkEdit = 0;
 223 #endif
 224
 225     m_privateContextMenu = NULL;
 226     m_updatesCount = -1;
 227     m_isNativeCaretShown = true;
 228 }
 229
 230 wxTextCtrl::~wxTextCtrl()
 231 {
 232 #if wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
 233     if ( m_dropTarget == wxRICHTEXT_DEFAULT_DROPTARGET )
 234     {
 235         // don't try to destroy this dummy pointer in the base class dtor
 236         m_dropTarget = NULL;
 237     }
 238 #endif // wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
 239
 240     delete m_privateContextMenu;
 241 }
 242
 243 bool wxTextCtrl::Create(wxWindow *parent,
 244                         wxWindowID id,
 245                         const wxString& value,
 246                         const wxPoint& pos,
 247                         const wxSize& size,
 248                         long style,
 249                         const wxValidator& validator,
 250                         const wxString& name)
 251 {
 252     // base initialization
 253     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 254         return false;
 255
 256     if ( !MSWCreateText(value, pos, size) )
 257         return false;
 258
 259 #if wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
 260     if ( IsRich() )
 261     {
 262         // rich text controls have a default associated drop target which
 263         // allows them to receive (rich) text dropped on them, which is nice,
 264         // but prevents us from associating a user-defined drop target with
 265         // them as we need to unregister the old one first
 266         //
 267         // to make it work, we set m_dropTarget to this special value initially
 268         // and check for it in our SetDropTarget()
 269         m_dropTarget = wxRICHTEXT_DEFAULT_DROPTARGET;
 270     }
 271 #endif // wxUSE_DRAG_AND_DROP && wxUSE_RICHEDIT
 272
 273     return true;
 274 }
 275
 276 // returns true if the platform should explicitly apply a theme border
 277 bool wxTextCtrl::CanApplyThemeBorder() const
 278 {
 279 #ifdef __WXWINCE__
 280     return false;
 281 #else
 282     // Standard text control already handles theming
 283     return ((GetWindowStyle() & (wxTE_RICH|wxTE_RICH2)) != 0);
 284 #endif
 285 }
 286
 287 bool wxTextCtrl::MSWCreateText(const wxString& value,
 288                                const wxPoint& pos,
 289                                const wxSize& size)
 290 {
 291     // translate wxWin style flags to MSW ones
 292     WXDWORD msStyle = MSWGetCreateWindowFlags();
 293
 294     // do create the control - either an EDIT or RICHEDIT
 295     wxString windowClass = wxT("EDIT");
 296
 297 #if defined(__POCKETPC__) || defined(__SMARTPHONE__)
 298     // A control that capitalizes the first letter
 299     if ( HasFlag(wxTE_CAPITALIZE) )
 300         windowClass = wxT("CAPEDIT");
 301 #endif
 302
 303 #if wxUSE_RICHEDIT
 304     if ( m_windowStyle & wxTE_AUTO_URL )
 305     {
 306         // automatic URL detection only works in RichEdit 2.0+
 307         m_windowStyle |= wxTE_RICH2;
 308     }
 309
 310     if ( m_windowStyle & wxTE_RICH2 )
 311     {
 312         // using richedit 2.0 implies using wxTE_RICH
 313         m_windowStyle |= wxTE_RICH;
 314     }
 315
 316     // we need to load the richedit DLL before creating the rich edit control
 317     if ( m_windowStyle & wxTE_RICH )
 318     {
 319         // versions 2.0, 3.0 and 4.1 of rich edit are mostly compatible with
 320         // each other but not with version 1.0, so we have separate flags for
 321         // the version 1.0 and the others (and so m_verRichEdit may be 0 (plain
 322         // EDIT control), 1 for version 1.0 or 2 for any higher version)
 323         //
 324         // notice that 1.0 has no Unicode support at all so in Unicode build we
 325         // must use another version
 326
 327 #if wxUSE_UNICODE
 328         m_verRichEdit = 2;
 329 #else // !wxUSE_UNICODE
 330         m_verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 331 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 332
 333 #if wxUSE_INKEDIT
 334         // First test if we can load an ink edit control. Normally, all edit
 335         // controls will be made ink edit controls if a tablet environment is
 336         // found (or if msw.inkedit != 0 and the InkEd.dll is present).
 337         // However, an application can veto ink edit controls by either specifying
 338         // msw.inkedit = 0 or by removing wxTE_RICH[2] from the style.
 339         //
 340         if ((wxSystemSettings::HasFeature(wxSYS_TABLET_PRESENT) || wxSystemOptions::GetOptionInt(wxT("msw.inkedit")) != 0) &&
 341             !(wxSystemOptions::HasOption(wxT("msw.inkedit")) && wxSystemOptions::GetOptionInt(wxT("msw.inkedit")) == 0))
 342         {
 343             if (wxRichEditModule::LoadInkEdit())
 344             {
 345                 windowClass = INKEDIT_CLASS;
 346
 347 #if wxUSE_INKEDIT && wxUSE_RICHEDIT
 348                 m_isInkEdit = 1;
 349 #endif
 350
 351                 // Fake rich text version for other calls
 352                 m_verRichEdit = 2;
 353             }
 354         }
 355 #endif
 356
 357 #if wxUSE_INKEDIT
 358         if (!IsInkEdit())
 359 #endif // wxUSE_INKEDIT
 360         {
 361             if ( m_verRichEdit == 2 )
 362             {
 363                 if ( wxRichEditModule::Load(wxRichEditModule::Version_41) )
 364                 {
 365                     // yes, class name for version 4.1 really is 5.0
 366                     windowClass = wxT("RICHEDIT50W");
 367
 368                     m_verRichEdit = 4;
 369                 }
 370                 else if ( wxRichEditModule::Load(wxRichEditModule::Version_2or3) )
 371                 {
 372                     windowClass = wxT("RichEdit20")
 373 #if wxUSE_UNICODE
 374                                 wxT("W");
 375 #else // ANSI
 376                                 wxT("A");
 377 #endif // Unicode/ANSI
 378                 }
 379                 else // failed to load msftedit.dll and riched20.dll
 380                 {
 381                     m_verRichEdit = 1;
 382                 }
 383             }
 384
 385             if ( m_verRichEdit == 1 )
 386             {
 387                 if ( wxRichEditModule::Load(wxRichEditModule::Version_1) )
 388                 {
 389                     windowClass = wxT("RICHEDIT");
 390                 }
 391                 else // failed to load any richedit control DLL
 392                 {
 393                     // only give the error msg once if the DLL can't be loaded
 394                     static bool s_errorGiven = false; // MT ok as only used by GUI
 395
 396                     if ( !s_errorGiven )
 397                     {
 398                         wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 399
 400                         s_errorGiven = true;
 401                     }
 402
 403                     m_verRichEdit = 0;
 404                 }
 405             }
 406         } // !useInkEdit
 407     }
 408 #endif // wxUSE_RICHEDIT
 409
 410     // we need to turn '\n's into "\r\n"s for the multiline controls
 411     wxString valueWin;
 412     if ( m_windowStyle & wxTE_MULTILINE )
 413     {
 414         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 415     }
 416     else // single line
 417     {
 418         valueWin = value;
 419     }
 420
 421     // suppress events sent during control creation: we're called either from
 422     // the ctor and then we shouldn't generate any events for compatibility
 423     // with the other ports, or from SetWindowStyleFlag() and then we shouldn't
 424     // generate the events because our text doesn't really change, the fact
 425     // that we (sometimes) need to recreate the control is just an
 426     // implementation detail
 427     m_updatesCount = -2;
 428
 429     if ( !MSWCreateControl(windowClass.wx_str(), msStyle, pos, size, valueWin) )
 430         return false;
 431
 432     m_updatesCount = -1;
 433
 434 #if wxUSE_RICHEDIT
 435     if (IsRich())
 436     {
 437 #if wxUSE_INKEDIT
 438         if (IsInkEdit())
 439         {
 440             // Pass IEM_InsertText (0) as wParam, in order to have the ink always
 441             // converted to text.
 442             ::SendMessage(GetHwnd(), EM_SETINKINSERTMODE, 0, 0);
 443
 444             // Make sure the mouse can be used for input
 445             ::SendMessage(GetHwnd(), EM_SETUSEMOUSEFORINPUT, 1, 0);
 446         }
 447 #endif
 448
 449         // enable the events we're interested in: we want to get EN_CHANGE as
 450         // for the normal controls
 451         LPARAM mask = ENM_CHANGE;
 452
 453         if (GetRichVersion() == 1 && !IsInkEdit())
 454         {
 455             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 456             // explained in its handler
 457            mask |= ENM_MOUSEEVENTS;
 458
 459            // we also need to force the appearance of the vertical scrollbar
 460            // initially as otherwise the control doesn't refresh correctly
 461            // after resize: but once the vertical scrollbar had been shown
 462            // (even if it's subsequently hidden) it does
 463            //
 464            // this is clearly a bug and for now it has been only noticed under
 465            // Windows XP, so if we're sure it works correctly under other
 466            // systems we could do this only for XP
 467            SetSize(-1, 1); // 1 is small enough to force vert scrollbar
 468            SetInitialSize(size);
 469         }
 470         else if ( m_windowStyle & wxTE_AUTO_URL )
 471         {
 472             mask |= ENM_LINK;
 473
 474             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 475         }
 476
 477         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 478     }
 479     else
 480 #endif // wxUSE_RICHEDIT
 481     if ( HasFlag(wxTE_MULTILINE) && HasFlag(wxTE_READONLY) )
 482     {
 483         // non-rich read-only multiline controls have grey background by
 484         // default under MSW but this is not always appropriate, so forcefully
 485         // reset the background colour to normal default
 486         //
 487         // this is not ideal but, after a long discussion on wx-dev (see
 488         // http://thread.gmane.org/gmane.comp.lib.wxwidgets.devel/116360/) it
 489         // was finally deemed to be the best behaviour by default (and ideally
 490         // we'd have a way to change this, see #11521)
 491         SetBackgroundColour(GetClassDefaultAttributes().colBg);
 492     }
 493
 494 #ifndef __WXWINCE__
 495     // Without this, if we pass the size in the constructor and then don't change it,
 496     // the themed borders will be drawn incorrectly.
 497     SetWindowPos(GetHwnd(), NULL, 0, 0, 0, 0,
 498                 SWP_NOZORDER|SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE|
 499                 SWP_FRAMECHANGED);
 500 #endif
 501
 502     return true;
 503 }
 504
 505 // Make sure the window style (etc.) reflects the HWND style (roughly)
 506 void wxTextCtrl::AdoptAttributesFromHWND()
 507 {
 508     wxWindow::AdoptAttributesFromHWND();
 509
 510     HWND hWnd = GetHwnd();
 511     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 512
 513     // retrieve the style to see whether this is an edit or richedit ctrl
 514 #if wxUSE_RICHEDIT
 515     wxString classname = wxGetWindowClass(GetHWND());
 516
 517     if ( classname.IsSameAs(wxT("EDIT"), false /* no case */) )
 518     {
 519         m_verRichEdit = 0;
 520     }
 521     else // rich edit?
 522     {
 523         wxChar c;
 524         if ( wxSscanf(classname, wxT("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 525         {
 526             wxLogDebug(wxT("Unknown edit control '%s'."), classname.c_str());
 527
 528             m_verRichEdit = 0;
 529         }
 530     }
 531 #endif // wxUSE_RICHEDIT
 532
 533     if (style & ES_MULTILINE)
 534         m_windowStyle |= wxTE_MULTILINE;
 535     if (style & ES_PASSWORD)
 536         m_windowStyle |= wxTE_PASSWORD;
 537     if (style & ES_READONLY)
 538         m_windowStyle |= wxTE_READONLY;
 539     if (style & ES_WANTRETURN)
 540         m_windowStyle |= wxTE_PROCESS_ENTER;
 541     if (style & ES_CENTER)
 542         m_windowStyle |= wxTE_CENTRE;
 543     if (style & ES_RIGHT)
 544         m_windowStyle |= wxTE_RIGHT;
 545 }
 546
 547 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 548 {
 549     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 550
 551     // styles which we always add by default
 552     if ( style & wxTE_MULTILINE )
 553     {
 554         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 555         if ( !(style & wxTE_NO_VSCROLL) )
 556         {
 557             // always adjust the vertical scrollbar automatically if we have it
 558             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 559
 560 #if wxUSE_RICHEDIT
 561             // we have to use this style for the rich edit controls because
 562             // without it the vertical scrollbar never appears at all in
 563             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 564             if ( style & wxTE_RICH2 )
 565             {
 566                 msStyle |= ES_DISABLENOSCROLL;
 567             }
 568 #endif // wxUSE_RICHEDIT
 569         }
 570
 571         style |= wxTE_PROCESS_ENTER;
 572     }
 573     else // !multiline
 574     {
 575         // there is really no reason to not have this style for single line
 576         // text controls
 577         msStyle |= ES_AUTOHSCROLL;
 578     }
 579
 580     // note that wxTE_DONTWRAP is the same as wxHSCROLL so if we have a horz
 581     // scrollbar, there is no wrapping -- which makes sense
 582     if ( style & wxTE_DONTWRAP )
 583     {
 584         // automatically scroll the control horizontally as necessary
 585         //
 586         // NB: ES_AUTOHSCROLL is needed for richedit controls or they don't
 587         //     show horz scrollbar at all, even in spite of WS_HSCROLL, and as
 588         //     it doesn't seem to do any harm for plain edit controls, add it
 589         //     always
 590         msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
 591     }
 592
 593     if ( style & wxTE_READONLY )
 594         msStyle |= ES_READONLY;
 595
 596     if ( style & wxTE_PASSWORD )
 597         msStyle |= ES_PASSWORD;
 598
 599     if ( style & wxTE_NOHIDESEL )
 600         msStyle |= ES_NOHIDESEL;
 601
 602     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 603     if ( style & wxTE_CENTRE )
 604         msStyle |= ES_CENTER;
 605     else if ( style & wxTE_RIGHT )
 606         msStyle |= ES_RIGHT;
 607     else
 608         msStyle |= ES_LEFT; // ES_LEFT is 0 as well but for consistency...
 609
 610     return msStyle;
 611 }
 612
 613 void wxTextCtrl::SetWindowStyleFlag(long style)
 614 {
 615     // changing the alignment of the control dynamically works under Win2003
 616     // (but not older Windows version: it seems to work under some versions of
 617     // XP but not other ones, and we have no way to determine it so be
 618     // conservative here) and only for plain EDIT controls (not RICH ones) and
 619     // we have to recreate the control to make it always work
 620     if ( IsRich() || wxGetWinVersion() < wxWinVersion_2003 )
 621     {
 622         const long alignMask = wxTE_LEFT | wxTE_CENTRE | wxTE_RIGHT;
 623         if ( (style & alignMask) != (GetWindowStyle() & alignMask) )
 624         {
 625             const wxString value = GetValue();
 626             const wxPoint pos = GetPosition();
 627             const wxSize size = GetSize();
 628
 629             // delete the old window
 630             HWND hwnd = GetHwnd();
 631             DissociateHandle();
 632             ::DestroyWindow(hwnd);
 633
 634             // create the new one with the updated flags
 635             m_windowStyle = style;
 636             MSWCreateText(value, pos, size);
 637
 638             // and make sure it has the same attributes as before
 639             if ( m_hasFont )
 640             {
 641                 // calling SetFont(m_font) would do nothing as the code would
 642                 // notice that the font didn't change, so force it to believe
 643                 // that it did
 644                 wxFont font = m_font;
 645                 m_font = wxNullFont;
 646                 SetFont(font);
 647             }
 648
 649             if ( m_hasFgCol )
 650             {
 651                 wxColour colFg = m_foregroundColour;
 652                 m_foregroundColour = wxNullColour;
 653                 SetForegroundColour(colFg);
 654             }
 655
 656             if ( m_hasBgCol )
 657             {
 658                 wxColour colBg = m_backgroundColour;
 659                 m_backgroundColour = wxNullColour;
 660                 SetBackgroundColour(colBg);
 661             }
 662
 663             // note that text styles are lost but this is probably not a big
 664             // problem: if you use styles, you probably don't use nor change
 665             // alignment flags anyhow
 666
 667             return;
 668         }
 669     }
 670
 671 #if wxUSE_RICHEDIT
 672     // we have to deal with some styles separately because they can't be
 673     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 674     // using richedit-specific EM_SETOPTIONS
 675     if ( IsRich() &&
 676             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 677     {
 678         bool set = (style & wxTE_NOHIDESEL) != 0;
 679
 680         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 681                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 682     }
 683 #endif // wxUSE_RICHEDIT
 684
 685     wxControl::SetWindowStyleFlag(style);
 686 }
 687
 688 // ----------------------------------------------------------------------------
 689 // set/get the controls text
 690 // ----------------------------------------------------------------------------
 691
 692 bool wxTextCtrl::IsEmpty() const
 693 {
 694     // this is an optimization for multiline controls containing a lot of text
 695     if ( IsMultiLine() && GetNumberOfLines() != 1 )
 696         return false;
 697
 698     return wxTextCtrlBase::IsEmpty();
 699 }
 700
 701 wxString wxTextCtrl::GetValue() const
 702 {
 703     // range 0..-1 is special for GetRange() and means to retrieve all text
 704     return GetRange(0, -1);
 705 }
 706
 707 wxString wxTextCtrl::GetRange(long from, long to) const
 708 {
 709     wxString str;
 710
 711     if ( from >= to && to != -1 )
 712     {
 713         // nothing to retrieve
 714         return str;
 715     }
 716
 717 #if wxUSE_RICHEDIT
 718     if ( IsRich() )
 719     {
 720         int len = GetWindowTextLength(GetHwnd());
 721         if ( len > from )
 722         {
 723             if ( to == -1 )
 724                 to = len;
 725
 726 #if !wxUSE_UNICODE
 727             // we must use EM_STREAMOUT if we don't want to lose all characters
 728             // not representable in the current character set (EM_GETTEXTRANGE
 729             // simply replaces them with question marks...)
 730             if ( GetRichVersion() > 1 )
 731             {
 732                 // we must have some encoding, otherwise any 8bit chars in the
 733                 // control are simply *lost* (replaced by '?')
 734                 wxFontEncoding encoding = wxFONTENCODING_SYSTEM;
 735
 736                 wxFont font = m_defaultStyle.GetFont();
 737                 if ( !font.IsOk() )
 738                     font = GetFont();
 739
 740                 if ( font.IsOk() )
 741                 {
 742                    encoding = font.GetEncoding();
 743                 }
 744
 745 #if wxUSE_INTL
 746                 if ( encoding == wxFONTENCODING_SYSTEM )
 747                 {
 748                     encoding = wxLocale::GetSystemEncoding();
 749                 }
 750 #endif // wxUSE_INTL
 751
 752                 if ( encoding == wxFONTENCODING_SYSTEM )
 753                 {
 754                     encoding = wxFONTENCODING_ISO8859_1;
 755                 }
 756
 757                 str = StreamOut(encoding);
 758
 759                 if ( !str.empty() )
 760                 {
 761                     // we have to manually extract the required part, luckily
 762                     // this is easy in this case as EOL characters in str are
 763                     // just LFs because we remove CRs in wxRichEditStreamOut
 764                     str = str.Mid(from, to - from);
 765                 }
 766             }
 767
 768             // StreamOut() wasn't used or failed, try to do it in normal way
 769             if ( str.empty() )
 770 #endif // !wxUSE_UNICODE
 771             {
 772                 // alloc one extra WORD as needed by the control
 773                 wxStringBuffer tmp(str, ++len);
 774                 wxChar *p = tmp;
 775
 776                 TEXTRANGE textRange;
 777                 textRange.chrg.cpMin = from;
 778                 textRange.chrg.cpMax = to;
 779                 textRange.lpstrText = p;
 780
 781                 (void)::SendMessage(GetHwnd(), EM_GETTEXTRANGE,
 782                                     0, (LPARAM)&textRange);
 783
 784                 if ( m_verRichEdit > 1 )
 785                 {
 786                     // RichEdit 2.0 uses just CR ('\r') for the
 787                     // newlines which is neither Unix nor Windows
 788                     // style - convert it to something reasonable
 789                     for ( ; *p; p++ )
 790                     {
 791                         if ( *p == wxT('\r') )
 792                             *p = wxT('\n');
 793                     }
 794                 }
 795             }
 796
 797             if ( m_verRichEdit == 1 )
 798             {
 799                 // convert to the canonical form - see comment below
 800                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 801             }
 802         }
 803         //else: no text at all, leave the string empty
 804     }
 805     else
 806 #endif // wxUSE_RICHEDIT
 807     {
 808         // retrieve all text: wxTextEntry method works even for multiline
 809         // controls and must be used for single line ones to account for hints
 810         str = wxTextEntry::GetValue();
 811
 812         // need only a range?
 813         if ( from < to )
 814         {
 815             str = str.Mid(from, to - from);
 816         }
 817
 818         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 819         // canonical one (same one as above) for consistency with the other kinds
 820         // of controls and, more importantly, with the other ports
 821         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 822     }
 823
 824     return str;
 825 }
 826
 827 void wxTextCtrl::DoSetValue(const wxString& value, int flags)
 828 {
 829     // if the text is long enough, it's faster to just set it instead of first
 830     // comparing it with the old one (chances are that it will be different
 831     // anyhow, this comparison is there to avoid flicker for small single-line
 832     // edit controls mostly)
 833     if ( (value.length() > 0x400) || (value != DoGetValue()) )
 834     {
 835         DoWriteText(value, flags /* doesn't include SelectionOnly here */);
 836
 837         // mark the control as being not dirty - we changed its text, not the
 838         // user
 839         DiscardEdits();
 840
 841         // for compatibility, don't move the cursor when doing SetValue()
 842         SetInsertionPoint(0);
 843     }
 844     else // same text
 845     {
 846         // still reset the modified flag even if the value didn't really change
 847         // because now it comes from the program and not the user (and do it
 848         // before generating the event so that the event handler could get the
 849         // expected value from IsModified())
 850         DiscardEdits();
 851
 852         // still send an event for consistency
 853         if (flags & SetValue_SendEvent)
 854             SendUpdateEvent();
 855     }
 856 }
 857
 858 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 859
 860 // TODO: using memcpy() would improve performance a lot for big amounts of text
 861
 862 DWORD CALLBACK
 863 wxRichEditStreamIn(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 864 {
 865     *pcb = 0;
 866
 867     const wchar_t ** const ppws = (const wchar_t **)dwCookie;
 868
 869     wchar_t *wbuf = (wchar_t *)buf;
 870     const wchar_t *wpc = *ppws;
 871     while ( cb && *wpc )
 872     {
 873         *wbuf++ = *wpc++;
 874
 875         cb -= sizeof(wchar_t);
 876         (*pcb) += sizeof(wchar_t);
 877     }
 878
 879     *ppws = wpc;
 880
 881     return 0;
 882 }
 883
 884 // helper struct used to pass parameters from wxTextCtrl to wxRichEditStreamOut
 885 struct wxStreamOutData
 886 {
 887     wchar_t *wpc;
 888     size_t len;
 889 };
 890
 891 DWORD CALLBACK
 892 wxRichEditStreamOut(DWORD_PTR dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 893 {
 894     *pcb = 0;
 895
 896     wxStreamOutData *data = (wxStreamOutData *)dwCookie;
 897
 898     const wchar_t *wbuf = (const wchar_t *)buf;
 899     wchar_t *wpc = data->wpc;
 900     while ( cb )
 901     {
 902         wchar_t wch = *wbuf++;
 903
 904         // turn "\r\n" into "\n" on the fly
 905         if ( wch != L'\r' )
 906             *wpc++ = wch;
 907         else
 908             data->len--;
 909
 910         cb -= sizeof(wchar_t);
 911         (*pcb) += sizeof(wchar_t);
 912     }
 913
 914     data->wpc = wpc;
 915
 916     return 0;
 917 }
 918
 919
 920 #if wxUSE_UNICODE_MSLU
 921     #define UNUSED_IF_MSLU(param)
 922 #else
 923     #define UNUSED_IF_MSLU(param) param
 924 #endif
 925
 926 bool
 927 wxTextCtrl::StreamIn(const wxString& value,
 928                      wxFontEncoding UNUSED_IF_MSLU(encoding),
 929                      bool selectionOnly)
 930 {
 931 #if wxUSE_UNICODE_MSLU
 932     const wchar_t *wpc = value.c_str();
 933 #else // !wxUSE_UNICODE_MSLU
 934     wxCSConv conv(encoding);
 935
 936     const size_t len = conv.MB2WC(NULL, value.mb_str(), value.length());
 937
 938     if (len == wxCONV_FAILED)
 939         return false;
 940
 941     wxWCharBuffer wchBuf(len); // allocates one extra character
 942     wchar_t *wpc = wchBuf.data();
 943
 944     conv.MB2WC(wpc, value.mb_str(), len + 1);
 945 #endif // wxUSE_UNICODE_MSLU
 946
 947     // finally, stream it in the control
 948     EDITSTREAM eds;
 949     wxZeroMemory(eds);
 950     eds.dwCookie = (DWORD_PTR)&wpc;
 951     // the cast below is needed for broken (very) old mingw32 headers
 952     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 953
 954     // same problem as in DoWriteText(): we can get multiple events here
 955     UpdatesCountFilter ucf(m_updatesCount);
 956
 957     ::SendMessage(GetHwnd(), EM_STREAMIN,
 958                   SF_TEXT |
 959                   SF_UNICODE |
 960                   (selectionOnly ? SFF_SELECTION : 0),
 961                   (LPARAM)&eds);
 962
 963     // It's okay for EN_UPDATE to not be sent if the selection is empty and
 964     // the text is empty, otherwise warn the programmer about it.
 965     wxASSERT_MSG( ucf.GotUpdate() || ( !HasSelection() && value.empty() ),
 966                   wxT("EM_STREAMIN didn't send EN_UPDATE?") );
 967
 968     if ( eds.dwError )
 969     {
 970         wxLogLastError(wxT("EM_STREAMIN"));
 971     }
 972
 973     return true;
 974 }
 975
 976 #if !wxUSE_UNICODE_MSLU
 977
 978 wxString
 979 wxTextCtrl::StreamOut(wxFontEncoding encoding, bool selectionOnly) const
 980 {
 981     wxString out;
 982
 983     const int len = GetWindowTextLength(GetHwnd());
 984
 985     wxWCharBuffer wchBuf(len);
 986     wchar_t *wpc = wchBuf.data();
 987
 988     wxStreamOutData data;
 989     data.wpc = wpc;
 990     data.len = len;
 991
 992     EDITSTREAM eds;
 993     wxZeroMemory(eds);
 994     eds.dwCookie = (DWORD)&data;
 995     eds.pfnCallback = wxRichEditStreamOut;
 996
 997     ::SendMessage
 998       (
 999         GetHwnd(),
1000         EM_STREAMOUT,
1001         SF_TEXT | SF_UNICODE | (selectionOnly ? SFF_SELECTION : 0),
1002         (LPARAM)&eds
1003       );
1004
1005     if ( eds.dwError )
1006     {
1007         wxLogLastError(wxT("EM_STREAMOUT"));
1008     }
1009     else // streamed out ok
1010     {
1011         // NUL-terminate the string because its length could have been
1012         // decreased by wxRichEditStreamOut
1013         *(wchBuf.data() + data.len) = L'\0';
1014
1015         // now convert to the given encoding (this is a possibly lossful
1016         // conversion but what else can we do)
1017         wxCSConv conv(encoding);
1018         size_t lenNeeded = conv.WC2MB(NULL, wchBuf, 0);
1019
1020         if ( lenNeeded != wxCONV_FAILED && lenNeeded++ )
1021         {
1022             conv.WC2MB(wxStringBuffer(out, lenNeeded), wchBuf, lenNeeded);
1023         }
1024     }
1025
1026     return out;
1027 }
1028
1029 #endif // !wxUSE_UNICODE_MSLU
1030
1031 #endif // wxUSE_RICHEDIT
1032
1033 void wxTextCtrl::WriteText(const wxString& value)
1034 {
1035     DoWriteText(value);
1036 }
1037
1038 void wxTextCtrl::DoWriteText(const wxString& value, int flags)
1039 {
1040     bool selectionOnly = (flags & SetValue_SelectionOnly) != 0;
1041     wxString valueDos;
1042     if ( m_windowStyle & wxTE_MULTILINE )
1043         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
1044     else
1045         valueDos = value;
1046
1047 #if wxUSE_RICHEDIT
1048     // there are several complications with the rich edit controls here
1049     bool done = false;
1050     if ( IsRich() )
1051     {
1052         // first, ensure that the new text will be in the default style
1053         if ( !m_defaultStyle.IsDefault() )
1054         {
1055             long start, end;
1056             GetSelection(&start, &end);
1057             SetStyle(start, end, m_defaultStyle);
1058         }
1059
1060 #if wxUSE_UNICODE_MSLU
1061         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
1062         // but EM_STREAMIN works
1063         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
1064         {
1065            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
1066         }
1067 #endif // wxUSE_UNICODE_MSLU
1068
1069 #if !wxUSE_UNICODE
1070         // next check if the text we're inserting must be shown in a non
1071         // default charset -- this only works for RichEdit > 1.0
1072         if ( GetRichVersion() > 1 )
1073         {
1074             wxFont font = m_defaultStyle.GetFont();
1075             if ( !font.IsOk() )
1076                 font = GetFont();
1077
1078             if ( font.IsOk() )
1079             {
1080                wxFontEncoding encoding = font.GetEncoding();
1081                if ( encoding != wxFONTENCODING_SYSTEM )
1082                {
1083                    // we have to use EM_STREAMIN to force richedit control 2.0+
1084                    // to show any text in the non default charset -- otherwise
1085                    // it thinks it knows better than we do and always shows it
1086                    // in the default one
1087                    done = StreamIn(valueDos, encoding, selectionOnly);
1088                }
1089             }
1090         }
1091 #endif // !wxUSE_UNICODE
1092     }
1093
1094     if ( !done )
1095 #endif // wxUSE_RICHEDIT
1096     {
1097         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
1098         // call (this happens for plain EDITs with EM_REPLACESEL and under some
1099         // -- undetermined -- conditions with rich edit) and sometimes we don't
1100         // get any events at all (plain EDIT with WM_SETTEXT), so ensure that
1101         // we generate exactly one of them by ignoring all but the first one in
1102         // SendUpdateEvent() and generating one ourselves if we hadn't got any
1103         // notifications from Windows
1104         if ( !(flags & SetValue_SendEvent) )
1105             m_updatesCount = -2;        // suppress any update event
1106
1107         UpdatesCountFilter ucf(m_updatesCount);
1108
1109         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
1110                       // EM_REPLACESEL takes 1 to indicate the operation should be redoable
1111                       selectionOnly ? 1 : 0, (LPARAM)valueDos.wx_str());
1112
1113         if ( !ucf.GotUpdate() && (flags & SetValue_SendEvent) )
1114         {
1115             SendUpdateEvent();
1116         }
1117     }
1118 }
1119
1120 void wxTextCtrl::AppendText(const wxString& text)
1121 {
1122     wxTextEntry::AppendText(text);
1123
1124 #if wxUSE_RICHEDIT
1125     // don't do this if we're frozen, saves some time
1126     if ( !IsFrozen() && IsMultiLine() && GetRichVersion() > 1 )
1127     {
1128         ::SendMessage(GetHwnd(), WM_VSCROLL, SB_BOTTOM, (LPARAM)NULL);
1129     }
1130 #endif // wxUSE_RICHEDIT
1131 }
1132
1133 void wxTextCtrl::Clear()
1134 {
1135     ::SetWindowText(GetHwnd(), wxEmptyString);
1136
1137     if ( IsMultiLine() && !IsRich() )
1138     {
1139         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
1140         // but the normal ones don't -- make Clear() behaviour consistent by
1141         // always sending this event
1142         SendUpdateEvent();
1143     }
1144 }
1145
1146 #ifdef __WIN32__
1147
1148 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
1149 {
1150     SetFocus();
1151
1152     size_t lenOld = GetValue().length();
1153
1154     wxUint32 code = event.GetRawKeyCode();
1155     ::keybd_event((BYTE)code, 0, 0 /* key press */, 0);
1156     ::keybd_event((BYTE)code, 0, KEYEVENTF_KEYUP, 0);
1157
1158     // assume that any alphanumeric key changes the total number of characters
1159     // in the control - this should work in 99% of cases
1160     return GetValue().length() != lenOld;
1161 }
1162
1163 #endif // __WIN32__
1164
1165 // ----------------------------------------------------------------------------
1166 // Accessors
1167 // ----------------------------------------------------------------------------
1168
1169 void wxTextCtrl::SetInsertionPointEnd()
1170 {
1171     // we must not do anything if the caret is already there because calling
1172     // SetInsertionPoint() thaws the controls if Freeze() had been called even
1173     // if it doesn't actually move the caret anywhere and so the simple fact of
1174     // doing it results in horrible flicker when appending big amounts of text
1175     // to the control in a few chunks (see DoAddText() test in the text sample)
1176     const wxTextPos lastPosition = GetLastPosition();
1177     if ( GetInsertionPoint() == lastPosition )
1178     {
1179         return;
1180     }
1181
1182     SetInsertionPoint(lastPosition);
1183 }
1184
1185 long wxTextCtrl::GetInsertionPoint() const
1186 {
1187 #if wxUSE_RICHEDIT
1188     if ( IsRich() )
1189     {
1190         CHARRANGE range;
1191         range.cpMin = 0;
1192         range.cpMax = 0;
1193         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
1194         return range.cpMin;
1195     }
1196 #endif // wxUSE_RICHEDIT
1197
1198     return wxTextEntry::GetInsertionPoint();
1199 }
1200
1201 wxTextPos wxTextCtrl::GetLastPosition() const
1202 {
1203     if ( IsMultiLine() )
1204     {
1205         int numLines = GetNumberOfLines();
1206         long posStartLastLine = XYToPosition(0, numLines - 1);
1207
1208         long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
1209
1210         return posStartLastLine + lenLastLine;
1211     }
1212
1213     return wxTextEntry::GetLastPosition();
1214 }
1215
1216 // If the return values from and to are the same, there is no
1217 // selection.
1218 void wxTextCtrl::GetSelection(long *from, long *to) const
1219 {
1220 #if wxUSE_RICHEDIT
1221     if ( IsRich() )
1222     {
1223         CHARRANGE charRange;
1224         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
1225
1226         *from = charRange.cpMin;
1227         *to = charRange.cpMax;
1228     }
1229     else
1230 #endif // !wxUSE_RICHEDIT
1231     {
1232         wxTextEntry::GetSelection(from, to);
1233     }
1234 }
1235
1236 // ----------------------------------------------------------------------------
1237 // selection
1238 // ----------------------------------------------------------------------------
1239
1240 void wxTextCtrl::DoSetSelection(long from, long to, int flags)
1241 {
1242     HWND hWnd = GetHwnd();
1243
1244 #if wxUSE_RICHEDIT
1245     if ( IsRich() )
1246     {
1247         // if from and to are both -1, it means (in wxWidgets) that all text
1248         // should be selected, translate this into Windows convention
1249         if ( (from == -1) && (to == -1) )
1250         {
1251             from = 0;
1252         }
1253
1254         CHARRANGE range;
1255         range.cpMin = from;
1256         range.cpMax = to;
1257         ::SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM)&range);
1258     }
1259     else
1260 #endif // wxUSE_RICHEDIT
1261     {
1262         wxTextEntry::DoSetSelection(from, to, flags);
1263     }
1264
1265     if ( (flags & SetSel_Scroll) && !IsFrozen() )
1266     {
1267 #if wxUSE_RICHEDIT
1268         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1269         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1270         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1271         // option is set (but it does work ok in richedit 1.0 mode...)
1272         //
1273         // so to make it work we either need to give focus to it here which
1274         // will probably create many problems (dummy focus events; window
1275         // containing the text control being brought to foreground
1276         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1277         // create other problems too -- and in fact it does because if we turn
1278         // on/off this style while appending the text to the control, the
1279         // vertical scrollbar never appears in it even if we append tons of
1280         // text and to work around this the only solution I found was to use
1281         // ES_DISABLENOSCROLL
1282         //
1283         // this is very ugly but I don't see any other way to make this work
1284         long style = 0;
1285         if ( GetRichVersion() > 1 )
1286         {
1287             if ( !HasFlag(wxTE_NOHIDESEL) )
1288             {
1289                 // setting ECO_NOHIDESEL also sets WS_VISIBLE and possibly
1290                 // others, remember the style so we can reset it later if needed
1291                 style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
1292                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1293                               ECOOP_OR, ECO_NOHIDESEL);
1294             }
1295             //else: everything is already ok
1296         }
1297 #endif // wxUSE_RICHEDIT
1298
1299         ::SendMessage(hWnd, EM_SCROLLCARET, 0, (LPARAM)0);
1300
1301 #if wxUSE_RICHEDIT
1302         // restore ECO_NOHIDESEL if we changed it
1303         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1304         {
1305             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1306                           ECOOP_AND, ~ECO_NOHIDESEL);
1307             if ( style != ::GetWindowLong(GetHwnd(), GWL_STYLE) )
1308                 ::SetWindowLong(GetHwnd(), GWL_STYLE, style);
1309         }
1310 #endif // wxUSE_RICHEDIT
1311     }
1312 }
1313
1314 // ----------------------------------------------------------------------------
1315 // Working with files
1316 // ----------------------------------------------------------------------------
1317
1318 bool wxTextCtrl::DoLoadFile(const wxString& file, int fileType)
1319 {
1320     if ( wxTextCtrlBase::DoLoadFile(file, fileType) )
1321     {
1322         // update the size limit if needed
1323         AdjustSpaceLimit();
1324
1325         return true;
1326     }
1327
1328     return false;
1329 }
1330
1331 // ----------------------------------------------------------------------------
1332 // dirty status
1333 // ----------------------------------------------------------------------------
1334
1335 bool wxTextCtrl::IsModified() const
1336 {
1337     return ::SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1338 }
1339
1340 void wxTextCtrl::MarkDirty()
1341 {
1342     ::SendMessage(GetHwnd(), EM_SETMODIFY, TRUE, 0);
1343 }
1344
1345 void wxTextCtrl::DiscardEdits()
1346 {
1347     ::SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0);
1348 }
1349
1350 // ----------------------------------------------------------------------------
1351 // Positions <-> coords
1352 // ----------------------------------------------------------------------------
1353
1354 int wxTextCtrl::GetNumberOfLines() const
1355 {
1356     return (int)::SendMessage(GetHwnd(), EM_GETLINECOUNT, 0, 0);
1357 }
1358
1359 long wxTextCtrl::XYToPosition(long x, long y) const
1360 {
1361     // This gets the char index for the _beginning_ of this line
1362     long charIndex = ::SendMessage(GetHwnd(), EM_LINEINDEX, y, 0);
1363
1364     return charIndex + x;
1365 }
1366
1367 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1368 {
1369     HWND hWnd = GetHwnd();
1370
1371     // This gets the line number containing the character
1372     long lineNo;
1373 #if wxUSE_RICHEDIT
1374     if ( IsRich() )
1375     {
1376         lineNo = ::SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, pos);
1377     }
1378     else
1379 #endif // wxUSE_RICHEDIT
1380     {
1381         lineNo = ::SendMessage(hWnd, EM_LINEFROMCHAR, pos, 0);
1382     }
1383
1384     if ( lineNo == -1 )
1385     {
1386         // no such line
1387         return false;
1388     }
1389
1390     // This gets the char index for the _beginning_ of this line
1391     long charIndex = ::SendMessage(hWnd, EM_LINEINDEX, lineNo, 0);
1392     if ( charIndex == -1 )
1393     {
1394         return false;
1395     }
1396
1397     // The X position must therefore be the different between pos and charIndex
1398     if ( x )
1399         *x = pos - charIndex;
1400     if ( y )
1401         *y = lineNo;
1402
1403     return true;
1404 }
1405
1406 wxTextCtrlHitTestResult
1407 wxTextCtrl::HitTest(const wxPoint& pt, long *posOut) const
1408 {
1409     // first get the position from Windows
1410     LPARAM lParam;
1411
1412 #if wxUSE_RICHEDIT
1413     POINTL ptl;
1414     if ( IsRich() )
1415     {
1416         // for rich edit controls the position is passed iva the struct fields
1417         ptl.x = pt.x;
1418         ptl.y = pt.y;
1419         lParam = (LPARAM)&ptl;
1420     }
1421     else
1422 #endif // wxUSE_RICHEDIT
1423     {
1424         // for the plain ones, we are limited to 16 bit positions which are
1425         // combined in a single 32 bit value
1426         lParam = MAKELPARAM(pt.x, pt.y);
1427     }
1428
1429     LRESULT pos = ::SendMessage(GetHwnd(), EM_CHARFROMPOS, 0, lParam);
1430
1431     if ( pos == -1 )
1432     {
1433         // this seems to indicate an error...
1434         return wxTE_HT_UNKNOWN;
1435     }
1436
1437 #if wxUSE_RICHEDIT
1438     if ( !IsRich() )
1439 #endif // wxUSE_RICHEDIT
1440     {
1441         // for plain EDIT controls the higher word contains something else
1442         pos = LOWORD(pos);
1443     }
1444
1445
1446     // next determine where it is relatively to our point: EM_CHARFROMPOS
1447     // always returns the closest character but we need to be more precise, so
1448     // double check that we really are where it pretends
1449     POINTL ptReal;
1450
1451 #if wxUSE_RICHEDIT
1452     // FIXME: we need to distinguish between richedit 2 and 3 here somehow but
1453     //        we don't know how to do it
1454     if ( IsRich() )
1455     {
1456         ::SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&ptReal, pos);
1457     }
1458     else
1459 #endif // wxUSE_RICHEDIT
1460     {
1461         LRESULT lRc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1462
1463         if ( lRc == -1 )
1464         {
1465             // this is apparently returned when pos corresponds to the last
1466             // position
1467             ptReal.x =
1468             ptReal.y = 0;
1469         }
1470         else
1471         {
1472             ptReal.x = LOWORD(lRc);
1473             ptReal.y = HIWORD(lRc);
1474         }
1475     }
1476
1477     wxTextCtrlHitTestResult rc;
1478
1479     if ( pt.y > ptReal.y + GetCharHeight() )
1480         rc = wxTE_HT_BELOW;
1481     else if ( pt.x > ptReal.x + GetCharWidth() )
1482         rc = wxTE_HT_BEYOND;
1483     else
1484         rc = wxTE_HT_ON_TEXT;
1485
1486     if ( posOut )
1487         *posOut = pos;
1488
1489     return rc;
1490 }
1491
1492 wxPoint wxTextCtrl::DoPositionToCoords(long pos) const
1493 {
1494     // FIXME: This code is broken for rich edit version 2.0 as it uses the same
1495     // API as plain edit i.e. the coordinates are returned directly instead of
1496     // filling the POINT passed as WPARAM with them but we can't distinguish
1497     // between 2.0 and 3.0 unfortunately (see also the use of EM_POSFROMCHAR
1498     // above).
1499 #if wxUSE_RICHEDIT
1500     if ( IsRich() )
1501     {
1502         POINT pt;
1503         LRESULT rc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, (WPARAM)&pt, pos);
1504         if ( rc != -1 )
1505             return wxPoint(pt.x, pt.y);
1506     }
1507     else
1508 #endif // wxUSE_RICHEDIT
1509     {
1510         LRESULT rc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos, 0);
1511         if ( rc == -1 )
1512         {
1513             // Finding coordinates for the last position of the control fails
1514             // in plain EDIT control, try to compensate for it by finding it
1515             // ourselves from the position of the previous character.
1516             if ( pos < GetLastPosition() )
1517             {
1518                 // It's not the expected correctable failure case so just fail.
1519                 return wxDefaultPosition;
1520             }
1521
1522             if ( pos == 0 )
1523             {
1524                 // We're being asked the coordinates of the first (and last and
1525                 // only) position in an empty control. There is no way to get
1526                 // it directly with EM_POSFROMCHAR but EM_GETMARGINS returns
1527                 // the correct value for at least the horizontal offset.
1528                 rc = ::SendMessage(GetHwnd(), EM_GETMARGINS, 0, 0);
1529
1530                 // Text control seems to effectively add 1 to margin.
1531                 return wxPoint(LOWORD(rc) + 1, 1);
1532             }
1533
1534             // We do have a previous character, try to get its coordinates.
1535             rc = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, pos - 1, 0);
1536             if ( rc == -1 )
1537             {
1538                 // If getting coordinates of the previous character failed as
1539                 // well, just give up.
1540                 return wxDefaultPosition;
1541             }
1542
1543             wxString prevChar = GetRange(pos - 1, pos);
1544             wxSize prevCharSize = GetTextExtent(prevChar);
1545
1546             if ( prevChar == wxT("\n" ))
1547             {
1548                 // 'pos' is at the beginning of a new line so its X coordinate
1549                 // should be the same as X coordinate of the first character of
1550                 // any other line while its Y coordinate will be approximately
1551                 // (but we can't compute it exactly...) one character height
1552                 // more than that of the previous character.
1553                 LRESULT coords0 = ::SendMessage(GetHwnd(), EM_POSFROMCHAR, 0, 0);
1554                 if ( coords0 == -1 )
1555                     return wxDefaultPosition;
1556
1557                 rc = MAKELPARAM(LOWORD(coords0), HIWORD(rc) + prevCharSize.y);
1558             }
1559             else
1560             {
1561                 // Simple case: previous character is in the same line so this
1562                 // one is just after it.
1563                 rc += MAKELPARAM(prevCharSize.x, 0);
1564             }
1565         }
1566
1567         // Notice that {LO,HI}WORD macros return WORDs, i.e. unsigned shorts,
1568         // while we want to have signed values here (the y coordinate of any
1569         // position above the first currently visible line is negative, for
1570         // example), hence the need for casts.
1571         return wxPoint(static_cast<short>(LOWORD(rc)),
1572                         static_cast<short>(HIWORD(rc)));
1573     }
1574
1575     return wxDefaultPosition;
1576 }
1577
1578
1579 // ----------------------------------------------------------------------------
1580 //
1581 // ----------------------------------------------------------------------------
1582
1583 void wxTextCtrl::ShowPosition(long pos)
1584 {
1585     HWND hWnd = GetHwnd();
1586
1587     // To scroll to a position, we pass the number of lines and characters
1588     // to scroll *by*. This means that we need to:
1589     // (1) Find the line position of the current line.
1590     // (2) Find the line position of pos.
1591     // (3) Scroll by (pos - current).
1592     // For now, ignore the horizontal scrolling.
1593
1594     // Is this where scrolling is relative to - the line containing the caret?
1595     // Or is the first visible line??? Try first visible line.
1596 //    int currentLineLineNo1 = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, -1, 0L);
1597
1598     int currentLineLineNo = (int)::SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, 0, 0);
1599
1600     int specifiedLineLineNo = (int)::SendMessage(hWnd, EM_LINEFROMCHAR, pos, 0);
1601
1602     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1603
1604     if (linesToScroll != 0)
1605       ::SendMessage(hWnd, EM_LINESCROLL, 0, linesToScroll);
1606 }
1607
1608 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1609 {
1610     return ::SendMessage(GetHwnd(), EM_LINELENGTH, pos, 0);
1611 }
1612
1613 int wxTextCtrl::GetLineLength(long lineNo) const
1614 {
1615     long pos = XYToPosition(0, lineNo);
1616
1617     return GetLengthOfLineContainingPos(pos);
1618 }
1619
1620 wxString wxTextCtrl::GetLineText(long lineNo) const
1621 {
1622     size_t len = (size_t)GetLineLength(lineNo) + 1;
1623
1624     // there must be at least enough place for the length WORD in the
1625     // buffer
1626     len += sizeof(WORD);
1627
1628     wxString str;
1629     {
1630         wxStringBufferLength tmp(str, len);
1631         wxChar *buf = tmp;
1632
1633         *(WORD *)buf = (WORD)len;
1634         len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1635
1636 #if wxUSE_RICHEDIT
1637         if ( IsRich() )
1638         {
1639             // remove the '\r' returned by the rich edit control, the user code
1640             // should never see it
1641             if ( buf[len - 2] == wxT('\r') && buf[len - 1] == wxT('\n') )
1642             {
1643                 // richedit 1.0 uses "\r\n" as line terminator, so remove "\r"
1644                 // here and "\n" below
1645                 buf[len - 2] = wxT('\n');
1646                 len--;
1647             }
1648             else if ( buf[len - 1] == wxT('\r') )
1649             {
1650                 // richedit 2.0+ uses only "\r", replace it with "\n"
1651                 buf[len - 1] = wxT('\n');
1652             }
1653         }
1654 #endif // wxUSE_RICHEDIT
1655
1656         // remove the '\n' at the end, if any (this is how this function is
1657         // supposed to work according to the docs)
1658         if ( buf[len - 1] == wxT('\n') )
1659         {
1660             len--;
1661         }
1662
1663         buf[len] = 0;
1664         tmp.SetLength(len);
1665     }
1666
1667     return str;
1668 }
1669
1670 void wxTextCtrl::SetMaxLength(unsigned long len)
1671 {
1672 #if wxUSE_RICHEDIT
1673     if ( IsRich() )
1674     {
1675         ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, len ? len : 0x7fffffff);
1676     }
1677     else
1678 #endif // wxUSE_RICHEDIT
1679     {
1680         wxTextEntry::SetMaxLength(len);
1681     }
1682 }
1683
1684 // ----------------------------------------------------------------------------
1685 // Undo/redo
1686 // ----------------------------------------------------------------------------
1687
1688 void wxTextCtrl::Redo()
1689 {
1690 #if wxUSE_RICHEDIT
1691     if ( GetRichVersion() > 1 )
1692     {
1693         ::SendMessage(GetHwnd(), EM_REDO, 0, 0);
1694         return;
1695     }
1696 #endif // wxUSE_RICHEDIT
1697
1698     wxTextEntry::Redo();
1699 }
1700
1701 bool wxTextCtrl::CanRedo() const
1702 {
1703 #if wxUSE_RICHEDIT
1704     if ( GetRichVersion() > 1 )
1705         return ::SendMessage(GetHwnd(), EM_CANREDO, 0, 0) != 0;
1706 #endif // wxUSE_RICHEDIT
1707
1708     return wxTextEntry::CanRedo();
1709 }
1710
1711 // ----------------------------------------------------------------------------
1712 // caret handling (Windows only)
1713 // ----------------------------------------------------------------------------
1714
1715 bool wxTextCtrl::ShowNativeCaret(bool show)
1716 {
1717     if ( show != m_isNativeCaretShown )
1718     {
1719         if ( !(show ? ::ShowCaret(GetHwnd()) : ::HideCaret(GetHwnd())) )
1720         {
1721             // not an error, may simply indicate that it's not shown/hidden
1722             // yet (i.e. it had been hidden/shown 2 times before)
1723             return false;
1724         }
1725
1726         m_isNativeCaretShown = show;
1727     }
1728
1729     return true;
1730 }
1731
1732 // ----------------------------------------------------------------------------
1733 // implementation details
1734 // ----------------------------------------------------------------------------
1735
1736 void wxTextCtrl::Command(wxCommandEvent & event)
1737 {
1738     SetValue(event.GetString());
1739     ProcessCommand (event);
1740 }
1741
1742 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1743 {
1744     // By default, load the first file into the text window.
1745     if (event.GetNumberOfFiles() > 0)
1746     {
1747         LoadFile(event.GetFiles()[0]);
1748     }
1749 }
1750
1751 // ----------------------------------------------------------------------------
1752 // kbd input processing
1753 // ----------------------------------------------------------------------------
1754
1755 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
1756 {
1757     // check for our special keys here: if we don't do it and the parent frame
1758     // uses them as accelerators, they wouldn't work at all, so we disable
1759     // usual preprocessing for them
1760     if ( msg->message == WM_KEYDOWN )
1761     {
1762         const WPARAM vkey = msg->wParam;
1763         if ( HIWORD(msg->lParam) & KF_ALTDOWN )
1764         {
1765             // Alt-Backspace is accelerator for "Undo"
1766             if ( vkey == VK_BACK )
1767                 return false;
1768         }
1769         else // no Alt
1770         {
1771             // we want to process some Ctrl-foo and Shift-bar but no key
1772             // combinations without either Ctrl or Shift nor with both of them
1773             // pressed
1774             const int ctrl = wxIsCtrlDown(),
1775                       shift = wxIsShiftDown();
1776             switch ( ctrl + shift )
1777             {
1778                 default:
1779                     wxFAIL_MSG( wxT("how many modifiers have we got?") );
1780                     // fall through
1781
1782                 case 0:
1783                     switch ( vkey )
1784                     {
1785                         case VK_RETURN:
1786                             // This one is only special for multi line controls.
1787                             if ( !IsMultiLine() )
1788                                 break;
1789                             // fall through
1790
1791                         case VK_DELETE:
1792                         case VK_HOME:
1793                         case VK_END:
1794                             return false;
1795                     }
1796                     // fall through
1797                 case 2:
1798                     break;
1799
1800                 case 1:
1801                     // either Ctrl or Shift pressed
1802                     if ( ctrl )
1803                     {
1804                         switch ( vkey )
1805                         {
1806                             case 'C':
1807                             case 'V':
1808                             case 'X':
1809                             case VK_INSERT:
1810                             case VK_DELETE:
1811                             case VK_HOME:
1812                             case VK_END:
1813                                 return false;
1814                         }
1815                     }
1816                     else // Shift is pressed
1817                     {
1818                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1819                             return false;
1820                     }
1821             }
1822         }
1823     }
1824
1825     return wxControl::MSWShouldPreProcessMessage(msg);
1826 }
1827
1828 void wxTextCtrl::OnChar(wxKeyEvent& event)
1829 {
1830     switch ( event.GetKeyCode() )
1831     {
1832         case WXK_RETURN:
1833             {
1834                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1835                 InitCommandEvent(event);
1836                 event.SetString(GetValue());
1837                 if ( HandleWindowEvent(event) )
1838                 if ( !HasFlag(wxTE_MULTILINE) )
1839                     return;
1840                 //else: multiline controls need Enter for themselves
1841             }
1842             break;
1843
1844         case WXK_TAB:
1845             // ok, so this is getting absolutely ridiculous but I don't see
1846             // any other way to fix this bug: when a multiline text control is
1847             // inside a wxFrame, we need to generate the navigation event as
1848             // otherwise nothing happens at all, but when the same control is
1849             // created inside a dialog, IsDialogMessage() *does* switch focus
1850             // all by itself and so if we do it here as well, it is advanced
1851             // twice and goes to the next control... to prevent this from
1852             // happening we're doing this ugly check, the logic being that if
1853             // we don't have focus then it had been already changed to the next
1854             // control
1855             //
1856             // the right thing to do would, of course, be to understand what
1857             // the hell is IsDialogMessage() doing but this is beyond my feeble
1858             // forces at the moment unfortunately
1859             if ( !(m_windowStyle & wxTE_PROCESS_TAB))
1860             {
1861                 if ( FindFocus() == this )
1862                 {
1863                     int flags = 0;
1864                     if (!event.ShiftDown())
1865                         flags |= wxNavigationKeyEvent::IsForward ;
1866                     if (event.ControlDown())
1867                         flags |= wxNavigationKeyEvent::WinChange ;
1868                     if (Navigate(flags))
1869                         return;
1870                 }
1871             }
1872             else
1873             {
1874                 // Insert tab since calling the default Windows handler
1875                 // doesn't seem to do it
1876                 WriteText(wxT("\t"));
1877                 return;
1878             }
1879             break;
1880     }
1881
1882     // no, we didn't process it
1883     event.Skip();
1884 }
1885
1886 void wxTextCtrl::OnKeyDown(wxKeyEvent& event)
1887 {
1888     // richedit control doesn't send WM_PASTE, WM_CUT and WM_COPY messages
1889     // when Ctrl-V, X or C is pressed and this prevents wxClipboardTextEvent
1890     // from working. So we work around it by intercepting these shortcuts
1891     // ourselves and emitting clipboard events (which richedit will handle,
1892     // so everything works as before, including pasting of rich text):
1893     if ( event.GetModifiers() == wxMOD_CONTROL && IsRich() )
1894     {
1895         switch ( event.GetKeyCode() )
1896         {
1897             case 'C':
1898                 Copy();
1899                 return;
1900             case 'X':
1901                 Cut();
1902                 return;
1903             case 'V':
1904                 Paste();
1905                 return;
1906             default:
1907                 break;
1908         }
1909     }
1910
1911     // Default window procedure of multiline edit controls posts WM_CLOSE to
1912     // the parent window when it gets Escape key press for some reason, prevent
1913     // it from doing this as this resulted in dialog boxes being closed on
1914     // Escape even when they shouldn't be (we do handle Escape ourselves
1915     // correctly in the situations when it should close them).
1916     if ( event.GetKeyCode() == WXK_ESCAPE && IsMultiLine() )
1917         return;
1918
1919     // no, we didn't process it
1920     event.Skip();
1921 }
1922
1923 WXLRESULT wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1924 {
1925     WXLRESULT lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1926
1927     switch ( nMsg )
1928     {
1929         case WM_GETDLGCODE:
1930             {
1931                 // we always want the chars and the arrows: the arrows for
1932                 // navigation and the chars because we want Ctrl-C to work even
1933                 // in a read only control
1934                 long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1935
1936                 if ( IsEditable() )
1937                 {
1938                     // we may have several different cases:
1939                     // 1. normal: both TAB and ENTER are used for navigation
1940                     // 2. ctrl wants TAB for itself: ENTER is used to pass to
1941                     //    the next control in the dialog
1942                     // 3. ctrl wants ENTER for itself: TAB is used for dialog
1943                     //    navigation
1944                     // 4. ctrl wants both TAB and ENTER: Ctrl-ENTER is used to
1945                     //    go to the next control (we need some way to do it)
1946
1947                     // multiline controls should always get ENTER for themselves
1948                     if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1949                         lDlgCode |= DLGC_WANTMESSAGE;
1950
1951                     if ( HasFlag(wxTE_PROCESS_TAB) )
1952                         lDlgCode |= DLGC_WANTTAB;
1953
1954                     lRc |= lDlgCode;
1955                 }
1956                 else // !editable
1957                 {
1958                     // NB: use "=", not "|=" as the base class version returns
1959                     //     the same flags in the disabled state as usual (i.e.
1960                     //     including DLGC_WANTMESSAGE). This is strange (how
1961                     //     does it work in the native Win32 apps?) but for now
1962                     //     live with it.
1963                     lRc = lDlgCode;
1964                 }
1965                 if (IsMultiLine())
1966                     // Clear the DLGC_HASSETSEL bit from the return value
1967                     lRc &= ~DLGC_HASSETSEL;
1968             }
1969             break;
1970
1971 #if wxUSE_MENUS
1972         case WM_SETCURSOR:
1973             // rich text controls seem to have a bug and don't change the
1974             // cursor to the standard arrow one from the I-beam cursor usually
1975             // used by them even when a popup menu is shown (this works fine
1976             // for plain EDIT controls though), so explicitly work around this
1977             if ( IsRich() )
1978             {
1979                 extern wxMenu *wxCurrentPopupMenu;
1980                 if ( wxCurrentPopupMenu &&
1981                         wxCurrentPopupMenu->GetInvokingWindow() == this )
1982                     ::SetCursor(GetHcursorOf(*wxSTANDARD_CURSOR));
1983             }
1984 #endif // wxUSE_MENUS
1985     }
1986
1987     return lRc;
1988 }
1989
1990 // ----------------------------------------------------------------------------
1991 // text control event processing
1992 // ----------------------------------------------------------------------------
1993
1994 bool wxTextCtrl::SendUpdateEvent()
1995 {
1996     switch ( m_updatesCount )
1997     {
1998         case 0:
1999             // remember that we've got an update
2000             m_updatesCount++;
2001             break;
2002
2003         case 1:
2004             // we had already sent one event since the last control modification
2005             return false;
2006
2007         default:
2008             wxFAIL_MSG( wxT("unexpected wxTextCtrl::m_updatesCount value") );
2009             // fall through
2010
2011         case -1:
2012             // we hadn't updated the control ourselves, this event comes from
2013             // the user, don't need to ignore it nor update the count
2014             break;
2015
2016         case -2:
2017             // the control was updated programmatically and we do NOT want to
2018             // send events
2019             return false;
2020     }
2021
2022     return SendTextUpdatedEvent();
2023 }
2024
2025 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
2026 {
2027     switch ( param )
2028     {
2029         case EN_CHANGE:
2030             SendUpdateEvent();
2031             break;
2032
2033         case EN_MAXTEXT:
2034             // the text size limit has been hit -- try to increase it
2035             if ( !AdjustSpaceLimit() )
2036             {
2037                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
2038                 InitCommandEvent(event);
2039                 event.SetString(GetValue());
2040                 ProcessCommand(event);
2041             }
2042             break;
2043
2044             // the other edit notification messages are not processed (or, in
2045             // the case of EN_{SET/KILL}FOCUS were already handled at WM_SET/
2046             // KILLFOCUS level)
2047         default:
2048             return false;
2049     }
2050
2051     // processed
2052     return true;
2053 }
2054
2055 WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC, WXHWND hWnd)
2056 {
2057     if ( !IsEnabled() && !HasFlag(wxTE_MULTILINE) )
2058         return MSWControlColorDisabled(hDC);
2059
2060     return wxTextCtrlBase::MSWControlColor(hDC, hWnd);
2061 }
2062
2063 bool wxTextCtrl::HasSpaceLimit(unsigned int *len) const
2064 {
2065     // HACK: we try to automatically extend the limit for the amount of text
2066     //       to allow (interactively) entering more than 64Kb of text under
2067     //       Win9x but we shouldn't reset the text limit which was previously
2068     //       set explicitly with SetMaxLength()
2069     //
2070     //       Unfortunately there is no EM_GETLIMITTEXTSETBYUSER and so we don't
2071     //       know the limit we set (if any). We could solve this by storing the
2072     //       limit we set in wxTextCtrl but to save space we prefer to simply
2073     //       test here the actual limit value: we consider that SetMaxLength()
2074     //       can only be called for small values while EN_MAXTEXT is only sent
2075     //       for large values (in practice the default limit seems to be 30000
2076     //       but make it smaller just to be on the safe side)
2077     *len = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
2078     return *len < 10001;
2079
2080 }
2081
2082 bool wxTextCtrl::AdjustSpaceLimit()
2083 {
2084     unsigned int limit;
2085     if ( HasSpaceLimit(&limit) )
2086         return false;
2087
2088     unsigned int len = ::GetWindowTextLength(GetHwnd());
2089     if ( len >= limit )
2090     {
2091         // increment in 32Kb chunks
2092         SetMaxLength(len + 0x8000);
2093     }
2094
2095     // we changed the limit
2096     return true;
2097 }
2098
2099 bool wxTextCtrl::AcceptsFocusFromKeyboard() const
2100 {
2101     // we don't want focus if we can't be edited unless we're a multiline
2102     // control because then it might be still nice to get focus from keyboard
2103     // to be able to scroll it without mouse
2104     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
2105 }
2106
2107 wxSize wxTextCtrl::DoGetBestSize() const
2108 {
2109     int cx, cy;
2110     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
2111
2112     int wText = DEFAULT_ITEM_WIDTH;
2113
2114     int hText = cy;
2115     if ( m_windowStyle & wxTE_MULTILINE )
2116     {
2117         hText *= wxMax(wxMin(GetNumberOfLines(), 10), 2);
2118     }
2119     //else: for single line control everything is ok
2120
2121     // Text controls without border are special and have the same height as
2122     // static labels (they also have the same appearance when they're disable
2123     // and are often used as a sort of copyable to the clipboard label so it's
2124     // important that they have the same height as the normal labels to not
2125     // stand out).
2126     if ( !HasFlag(wxBORDER_NONE) )
2127     {
2128         // we have to add the adjustments for the control height only once, not
2129         // once per line, so do it after multiplication above
2130         hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;
2131     }
2132
2133     return wxSize(wText, hText);
2134 }
2135
2136 // ----------------------------------------------------------------------------
2137 // standard handlers for standard edit menu events
2138 // ----------------------------------------------------------------------------
2139
2140 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
2141 {
2142     Cut();
2143 }
2144
2145 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
2146 {
2147     Copy();
2148 }
2149
2150 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
2151 {
2152     Paste();
2153 }
2154
2155 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
2156 {
2157     Undo();
2158 }
2159
2160 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
2161 {
2162     Redo();
2163 }
2164
2165 void wxTextCtrl::OnDelete(wxCommandEvent& WXUNUSED(event))
2166 {
2167     RemoveSelection();
2168 }
2169
2170 void wxTextCtrl::OnSelectAll(wxCommandEvent& WXUNUSED(event))
2171 {
2172     SelectAll();
2173 }
2174
2175 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
2176 {
2177     event.Enable( CanCut() );
2178 }
2179
2180 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
2181 {
2182     event.Enable( CanCopy() );
2183 }
2184
2185 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
2186 {
2187     event.Enable( CanPaste() );
2188 }
2189
2190 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
2191 {
2192     event.Enable( CanUndo() );
2193 }
2194
2195 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
2196 {
2197     event.Enable( CanRedo() );
2198 }
2199
2200 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
2201 {
2202     event.Enable( HasSelection() && IsEditable() );
2203 }
2204
2205 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
2206 {
2207     event.Enable( !IsEmpty() );
2208 }
2209
2210 void wxTextCtrl::OnContextMenu(wxContextMenuEvent& event)
2211 {
2212 #if wxUSE_RICHEDIT
2213     if (IsRich())
2214     {
2215         if (!m_privateContextMenu)
2216         {
2217             m_privateContextMenu = new wxMenu;
2218             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
2219             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
2220             m_privateContextMenu->AppendSeparator();
2221             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
2222             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
2223             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
2224             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
2225             m_privateContextMenu->AppendSeparator();
2226             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
2227         }
2228         PopupMenu(m_privateContextMenu);
2229         return;
2230     }
2231     else
2232 #endif
2233     event.Skip();
2234 }
2235
2236 void wxTextCtrl::OnSetFocus(wxFocusEvent& event)
2237 {
2238     // be sure the caret remains invisible if the user had hidden it
2239     if ( !m_isNativeCaretShown )
2240     {
2241         ::HideCaret(GetHwnd());
2242     }
2243
2244     event.Skip();
2245 }
2246
2247 // the rest of the file only deals with the rich edit controls
2248 #if wxUSE_RICHEDIT
2249
2250 // ----------------------------------------------------------------------------
2251 // EN_LINK processing
2252 // ----------------------------------------------------------------------------
2253
2254 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
2255 {
2256     NMHDR *hdr = (NMHDR* )lParam;
2257     switch ( hdr->code )
2258     {
2259        case EN_MSGFILTER:
2260             {
2261                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
2262                 UINT msg = msgf->msg;
2263
2264                 // this is a bit crazy but richedit 1.0 sends us all mouse
2265                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
2266                 // generate the wxWin events for this message manually
2267                 //
2268                 // NB: in fact, this is still not totally correct as it does
2269                 //     send us WM_LBUTTONUP if the selection was cleared by the
2270                 //     last click -- so currently we get 2 events in this case,
2271                 //     but as I don't see any obvious way to check for this I
2272                 //     leave this code in place because it's still better than
2273                 //     not getting left up events at all
2274                 if ( msg == WM_LBUTTONUP )
2275                 {
2276                     WXUINT flags = msgf->wParam;
2277                     int x = GET_X_LPARAM(msgf->lParam),
2278                         y = GET_Y_LPARAM(msgf->lParam);
2279
2280                     HandleMouseEvent(msg, x, y, flags);
2281                 }
2282             }
2283
2284             // return true to process the event (and false to ignore it)
2285             return true;
2286
2287         case EN_LINK:
2288             {
2289                 const ENLINK *enlink = (ENLINK *)hdr;
2290
2291                 switch ( enlink->msg )
2292                 {
2293                     case WM_SETCURSOR:
2294                         // ok, so it is hardcoded - do we really nee to
2295                         // customize it?
2296                         {
2297                             wxCursor cur(wxCURSOR_HAND);
2298                             ::SetCursor(GetHcursorOf(cur));
2299                             *result = TRUE;
2300                             break;
2301                         }
2302
2303                     case WM_MOUSEMOVE:
2304                     case WM_LBUTTONDOWN:
2305                     case WM_LBUTTONUP:
2306                     case WM_LBUTTONDBLCLK:
2307                     case WM_RBUTTONDOWN:
2308                     case WM_RBUTTONUP:
2309                     case WM_RBUTTONDBLCLK:
2310                         // send a mouse event
2311                         {
2312                             static const wxEventType eventsMouse[] =
2313                             {
2314                                 wxEVT_MOTION,
2315                                 wxEVT_LEFT_DOWN,
2316                                 wxEVT_LEFT_UP,
2317                                 wxEVT_LEFT_DCLICK,
2318                                 wxEVT_RIGHT_DOWN,
2319                                 wxEVT_RIGHT_UP,
2320                                 wxEVT_RIGHT_DCLICK,
2321                             };
2322
2323                             // the event ids are consecutive
2324                             wxMouseEvent
2325                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
2326
2327                             InitMouseEvent(evtMouse,
2328                                            GET_X_LPARAM(enlink->lParam),
2329                                            GET_Y_LPARAM(enlink->lParam),
2330                                            enlink->wParam);
2331
2332                             wxTextUrlEvent event(m_windowId, evtMouse,
2333                                                  enlink->chrg.cpMin,
2334                                                  enlink->chrg.cpMax);
2335
2336                             InitCommandEvent(event);
2337
2338                             *result = ProcessCommand(event);
2339                         }
2340                         break;
2341                 }
2342             }
2343             return true;
2344     }
2345
2346     // not processed, leave it to the base class
2347     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
2348 }
2349
2350 #if wxUSE_DRAG_AND_DROP
2351
2352 void wxTextCtrl::SetDropTarget(wxDropTarget *dropTarget)
2353 {
2354     if ( m_dropTarget == wxRICHTEXT_DEFAULT_DROPTARGET )
2355     {
2356         // get rid of the built-in drop target
2357         ::RevokeDragDrop(GetHwnd());
2358         m_dropTarget = NULL;
2359     }
2360
2361     wxTextCtrlBase::SetDropTarget(dropTarget);
2362 }
2363
2364 #endif // wxUSE_DRAG_AND_DROP
2365
2366 // ----------------------------------------------------------------------------
2367 // colour setting for the rich edit controls
2368 // ----------------------------------------------------------------------------
2369
2370 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
2371 {
2372     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
2373     {
2374         // colour didn't really change
2375         return false;
2376     }
2377
2378     if ( IsRich() )
2379     {
2380         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
2381         // EM_SETBKGNDCOLOR additionally
2382         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
2383     }
2384
2385     return true;
2386 }
2387
2388 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
2389 {
2390     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
2391     {
2392         // colour didn't really change
2393         return false;
2394     }
2395
2396     if ( IsRich() )
2397     {
2398         // change the colour of everything
2399         CHARFORMAT cf;
2400         wxZeroMemory(cf);
2401         cf.cbSize = sizeof(cf);
2402         cf.dwMask = CFM_COLOR;
2403         cf.crTextColor = wxColourToRGB(colour);
2404         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
2405     }
2406
2407     return true;
2408 }
2409
2410 bool wxTextCtrl::SetFont(const wxFont& font)
2411 {
2412     if ( !wxTextCtrlBase::SetFont(font) )
2413         return false;
2414
2415     if ( GetRichVersion() >= 4 )
2416     {
2417         // Using WM_SETFONT is not enough with RichEdit 4.1: it does work but
2418         // for ASCII characters only and inserting a non-ASCII one into it
2419         // later reverts to the default font so use EM_SETCHARFORMAT to change
2420         // the default font for it.
2421         wxTextAttr attr;
2422         attr.SetFont(font);
2423         SetStyle(-1, -1, attr);
2424     }
2425
2426     return true;
2427 }
2428
2429 // ----------------------------------------------------------------------------
2430 // styling support for rich edit controls
2431 // ----------------------------------------------------------------------------
2432
2433 bool wxTextCtrl::MSWSetCharFormat(const wxTextAttr& style, long start, long end)
2434 {
2435     // initialize CHARFORMAT struct
2436 #if wxUSE_RICHEDIT2
2437     CHARFORMAT2 cf;
2438 #else
2439     CHARFORMAT cf;
2440 #endif
2441
2442     wxZeroMemory(cf);
2443
2444     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2445     // CHARFORMAT in that case
2446 #if wxUSE_RICHEDIT2
2447     if ( m_verRichEdit == 1 )
2448     {
2449         // this is the only thing the control is going to grok
2450         cf.cbSize = sizeof(CHARFORMAT);
2451     }
2452     else
2453 #endif
2454     {
2455         // CHARFORMAT or CHARFORMAT2
2456         cf.cbSize = sizeof(cf);
2457     }
2458
2459     if ( style.HasFont() )
2460     {
2461         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
2462         //     but using it doesn't seem to hurt neither so leaving it for now
2463
2464         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
2465                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
2466
2467         // fill in data from LOGFONT but recalculate lfHeight because we need
2468         // the real height in twips and not the negative number which
2469         // wxFillLogFont() returns (this is correct in general and works with
2470         // the Windows font mapper, but not here)
2471
2472         wxFont font(style.GetFont());
2473
2474         LOGFONT lf;
2475         wxFillLogFont(&lf, &font);
2476         cf.yHeight = 20*font.GetPointSize(); // 1 pt = 20 twips
2477         cf.bCharSet = lf.lfCharSet;
2478         cf.bPitchAndFamily = lf.lfPitchAndFamily;
2479         wxStrlcpy(cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName));
2480
2481         // also deal with underline/italic/bold attributes: note that we must
2482         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
2483         // style to allow clearing it
2484         if ( lf.lfItalic )
2485         {
2486             cf.dwEffects |= CFE_ITALIC;
2487         }
2488
2489         if ( lf.lfWeight == FW_BOLD )
2490         {
2491             cf.dwEffects |= CFE_BOLD;
2492         }
2493
2494         if ( lf.lfUnderline )
2495         {
2496             cf.dwEffects |= CFE_UNDERLINE;
2497         }
2498
2499         // strikeout fonts are not supported by wxWidgets
2500     }
2501
2502     if ( style.HasTextColour() )
2503     {
2504         cf.dwMask |= CFM_COLOR;
2505         cf.crTextColor = wxColourToRGB(style.GetTextColour());
2506     }
2507
2508 #if wxUSE_RICHEDIT2
2509     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
2510     {
2511         cf.dwMask |= CFM_BACKCOLOR;
2512         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
2513     }
2514 #endif // wxUSE_RICHEDIT2
2515
2516     // Apply the style either to the selection or to the entire control.
2517     WPARAM selMode;
2518     if ( start != -1 || end != -1 )
2519     {
2520         DoSetSelection(start, end, SetSel_NoScroll);
2521         selMode = SCF_SELECTION;
2522     }
2523     else
2524     {
2525         selMode = SCF_ALL;
2526     }
2527
2528     if ( !::SendMessage(GetHwnd(), EM_SETCHARFORMAT, selMode, (LPARAM)&cf) )
2529     {
2530         wxLogLastError(wxT("SendMessage(EM_SETCHARFORMAT)"));
2531         return false;
2532     }
2533
2534     return true;
2535 }
2536
2537 bool wxTextCtrl::MSWSetParaFormat(const wxTextAttr& style, long start, long end)
2538 {
2539 #if wxUSE_RICHEDIT2
2540     PARAFORMAT2 pf;
2541 #else
2542     PARAFORMAT pf;
2543 #endif
2544
2545     wxZeroMemory(pf);
2546
2547     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2548     // PARAFORMAT in that case
2549 #if wxUSE_RICHEDIT2
2550     if ( m_verRichEdit == 1 )
2551     {
2552         // this is the only thing the control is going to grok
2553         pf.cbSize = sizeof(PARAFORMAT);
2554     }
2555     else
2556 #endif
2557     {
2558         // PARAFORMAT or PARAFORMAT2
2559         pf.cbSize = sizeof(pf);
2560     }
2561
2562     if (style.HasAlignment())
2563     {
2564         pf.dwMask |= PFM_ALIGNMENT;
2565         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2566             pf.wAlignment = PFA_RIGHT;
2567         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2568             pf.wAlignment = PFA_CENTER;
2569         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2570             pf.wAlignment = PFA_JUSTIFY;
2571         else
2572             pf.wAlignment = PFA_LEFT;
2573     }
2574
2575     if (style.HasLeftIndent())
2576     {
2577         pf.dwMask |= PFM_STARTINDENT | PFM_OFFSET;
2578
2579         // Convert from 1/10 mm to TWIPS
2580         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2581         pf.dxOffset = (int) (((double) style.GetLeftSubIndent()) * mm2twips / 10.0) ;
2582     }
2583
2584     if (style.HasRightIndent())
2585     {
2586         pf.dwMask |= PFM_RIGHTINDENT;
2587
2588         // Convert from 1/10 mm to TWIPS
2589         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2590     }
2591
2592     if (style.HasTabs())
2593     {
2594         pf.dwMask |= PFM_TABSTOPS;
2595
2596         const wxArrayInt& tabs = style.GetTabs();
2597
2598         pf.cTabCount = (SHORT)wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2599         size_t i;
2600         for (i = 0; i < (size_t) pf.cTabCount; i++)
2601         {
2602             // Convert from 1/10 mm to TWIPS
2603             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2604         }
2605     }
2606
2607 #if wxUSE_RICHEDIT2
2608     if ( m_verRichEdit > 1 )
2609     {
2610         if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
2611         {
2612             // Use RTL paragraphs in RTL mode to get proper layout
2613             pf.dwMask |= PFM_RTLPARA;
2614             pf.wEffects |= PFE_RTLPARA;
2615         }
2616     }
2617 #endif // wxUSE_RICHEDIT2
2618
2619     if ( pf.dwMask )
2620     {
2621         // Do format the selection.
2622         DoSetSelection(start, end, SetSel_NoScroll);
2623
2624         if ( !::SendMessage(GetHwnd(), EM_SETPARAFORMAT, 0, (LPARAM) &pf) )
2625         {
2626             wxLogLastError(wxT("SendMessage(EM_SETPARAFORMAT)"));
2627
2628             return false;
2629         }
2630     }
2631
2632     return true;
2633 }
2634
2635 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
2636 {
2637     if ( !IsRich() )
2638     {
2639         // can't do it with normal text control
2640         return false;
2641     }
2642
2643     // the richedit 1.0 doesn't handle setting background colour, so don't
2644     // even try to do anything if it's the only thing we want to change
2645     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
2646         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
2647         !style.HasTabs() )
2648     {
2649         // nothing to do: return true if there was really nothing to do and
2650         // false if we failed to set bg colour
2651         return !style.HasBackgroundColour();
2652     }
2653
2654     // order the range if needed
2655     if ( start > end )
2656         wxSwap(start, end);
2657
2658     // we can only change the format of the selection, so select the range we
2659     // want and restore the old selection later, after MSWSetXXXFormat()
2660     // functions (possibly) change it.
2661     long startOld, endOld;
2662     GetSelection(&startOld, &endOld);
2663
2664     bool ok = MSWSetCharFormat(style, start, end);
2665     if ( !MSWSetParaFormat(style, start, end) )
2666         ok = false;
2667
2668     if ( start != startOld || end != endOld )
2669     {
2670         // restore the original selection
2671         DoSetSelection(startOld, endOld, SetSel_NoScroll);
2672     }
2673
2674     return ok;
2675 }
2676
2677 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2678 {
2679     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2680         return false;
2681
2682     if ( IsEditable() )
2683     {
2684         // we have to do this or the style wouldn't apply for the text typed by
2685         // the user
2686         wxTextPos posLast = GetLastPosition();
2687         SetStyle(posLast, posLast, m_defaultStyle);
2688     }
2689
2690     return true;
2691 }
2692
2693 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2694 {
2695     if ( !IsRich() )
2696     {
2697         // can't do it with normal text control
2698         return false;
2699     }
2700
2701     // initialize CHARFORMAT struct
2702 #if wxUSE_RICHEDIT2
2703     CHARFORMAT2 cf;
2704 #else
2705     CHARFORMAT cf;
2706 #endif
2707
2708     wxZeroMemory(cf);
2709
2710     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2711     // CHARFORMAT in that case
2712 #if wxUSE_RICHEDIT2
2713     if ( m_verRichEdit == 1 )
2714     {
2715         // this is the only thing the control is going to grok
2716         cf.cbSize = sizeof(CHARFORMAT);
2717     }
2718     else
2719 #endif
2720     {
2721         // CHARFORMAT or CHARFORMAT2
2722         cf.cbSize = sizeof(cf);
2723     }
2724     // we can only change the format of the selection, so select the range we
2725     // want and restore the old selection later
2726     long startOld, endOld;
2727     GetSelection(&startOld, &endOld);
2728
2729     // but do we really have to change the selection?
2730     bool changeSel = position != startOld || position != endOld;
2731
2732     if ( changeSel )
2733     {
2734         DoSetSelection(position, position + 1, SetSel_NoScroll);
2735     }
2736
2737     // get the selection formatting
2738     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2739                             SCF_SELECTION, (LPARAM)&cf) ;
2740
2741
2742     LOGFONT lf;
2743     lf.lfHeight = cf.yHeight;
2744     lf.lfWidth = 0;
2745     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2746     lf.lfClipPrecision = 0;
2747     lf.lfEscapement = 0;
2748     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2749
2750     //NOTE:  we _MUST_ set each of these values to _something_ since we
2751     //do not call wxZeroMemory on the LOGFONT lf
2752     if (cf.dwEffects & CFE_ITALIC)
2753         lf.lfItalic = TRUE;
2754     else
2755         lf.lfItalic = FALSE;
2756
2757     lf.lfOrientation = 0;
2758     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2759     lf.lfQuality = 0;
2760
2761     if (cf.dwEffects & CFE_STRIKEOUT)
2762         lf.lfStrikeOut = TRUE;
2763     else
2764         lf.lfStrikeOut = FALSE;
2765
2766     if (cf.dwEffects & CFE_UNDERLINE)
2767         lf.lfUnderline = TRUE;
2768     else
2769         lf.lfUnderline = FALSE;
2770
2771     if (cf.dwEffects & CFE_BOLD)
2772         lf.lfWeight = FW_BOLD;
2773     else
2774         lf.lfWeight = FW_NORMAL;
2775
2776     wxFont font = wxCreateFontFromLogFont(& lf);
2777     if (font.IsOk())
2778     {
2779         style.SetFont(font);
2780     }
2781     style.SetTextColour(wxColour(cf.crTextColor));
2782
2783 #if wxUSE_RICHEDIT2
2784     if ( m_verRichEdit != 1 )
2785     {
2786         // cf.dwMask |= CFM_BACKCOLOR;
2787         style.SetBackgroundColour(wxColour(cf.crBackColor));
2788     }
2789 #endif // wxUSE_RICHEDIT2
2790
2791     // now get the paragraph formatting
2792     PARAFORMAT2 pf;
2793     wxZeroMemory(pf);
2794     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2795     // PARAFORMAT in that case
2796 #if wxUSE_RICHEDIT2
2797     if ( m_verRichEdit == 1 )
2798     {
2799         // this is the only thing the control is going to grok
2800         pf.cbSize = sizeof(PARAFORMAT);
2801     }
2802     else
2803 #endif
2804     {
2805         // PARAFORMAT or PARAFORMAT2
2806         pf.cbSize = sizeof(pf);
2807     }
2808
2809     // do format the selection
2810     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2811
2812     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0), (int) ((double) pf.dxOffset * twips2mm * 10.0) );
2813     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2814
2815     if (pf.wAlignment == PFA_CENTER)
2816         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2817     else if (pf.wAlignment == PFA_RIGHT)
2818         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2819     else if (pf.wAlignment == PFA_JUSTIFY)
2820         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2821     else
2822         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2823
2824     wxArrayInt tabStops;
2825     size_t i;
2826     for (i = 0; i < (size_t) pf.cTabCount; i++)
2827     {
2828         tabStops.Add( (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) );
2829     }
2830
2831     if ( changeSel )
2832     {
2833         // restore the original selection
2834         DoSetSelection(startOld, endOld, SetSel_NoScroll);
2835     }
2836
2837     return true;
2838 }
2839
2840 // ----------------------------------------------------------------------------
2841 // wxRichEditModule
2842 // ----------------------------------------------------------------------------
2843
2844 static const HINSTANCE INVALID_HINSTANCE = (HINSTANCE)-1;
2845
2846 bool wxRichEditModule::OnInit()
2847 {
2848     // don't do anything - we will load it when needed
2849     return true;
2850 }
2851
2852 void wxRichEditModule::OnExit()
2853 {
2854     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2855     {
2856         if ( ms_hRichEdit[i] && ms_hRichEdit[i] != INVALID_HINSTANCE )
2857         {
2858             ::FreeLibrary(ms_hRichEdit[i]);
2859             ms_hRichEdit[i] = NULL;
2860         }
2861     }
2862 #if wxUSE_INKEDIT
2863     if (ms_inkEditLib.IsLoaded())
2864         ms_inkEditLib.Unload();
2865 #endif
2866 }
2867
2868 /* static */
2869 bool wxRichEditModule::Load(Version version)
2870 {
2871     if ( ms_hRichEdit[version] == INVALID_HINSTANCE )
2872     {
2873         // we had already tried to load it and failed
2874         return false;
2875     }
2876
2877     if ( ms_hRichEdit[version] )
2878     {
2879         // we've already got this one
2880         return true;
2881     }
2882
2883     static const wxChar *const dllnames[] =
2884     {
2885         wxT("riched32"),
2886         wxT("riched20"),
2887         wxT("msftedit"),
2888     };
2889
2890     wxCOMPILE_TIME_ASSERT( WXSIZEOF(dllnames) == Version_Max,
2891                             RichEditDllNamesVersionsMismatch );
2892
2893     ms_hRichEdit[version] = ::LoadLibrary(dllnames[version]);
2894
2895     if ( !ms_hRichEdit[version] )
2896     {
2897         ms_hRichEdit[version] = INVALID_HINSTANCE;
2898
2899         return false;
2900     }
2901
2902     return true;
2903 }
2904
2905 #if wxUSE_INKEDIT
2906 // load the InkEdit library
2907 bool wxRichEditModule::LoadInkEdit()
2908 {
2909     if (ms_inkEditLibLoadAttemped)
2910         return ms_inkEditLib.IsLoaded();
2911
2912     ms_inkEditLibLoadAttemped = true;
2913
2914     wxLogNull logNull;
2915     return ms_inkEditLib.Load(wxT("inked"));
2916 }
2917 #endif // wxUSE_INKEDIT
2918
2919
2920 #endif // wxUSE_RICHEDIT
2921
2922 #endif // wxUSE_TEXTCTRL && !(__SMARTPHONE__ && __WXWINCE__)