src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "textctrl.h"
  18 #endif
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/textctrl.h"
  33     #include "wx/settings.h"
  34     #include "wx/brush.h"
  35     #include "wx/utils.h"
  36     #include "wx/intl.h"
  37     #include "wx/log.h"
  38     #include "wx/app.h"
  39 #endif
  40
  41 #include "wx/module.h"
  42
  43 #if wxUSE_CLIPBOARD
  44     #include "wx/clipbrd.h"
  45 #endif
  46
  47 #include "wx/textfile.h"
  48
  49 #include <windowsx.h>
  50
  51 #include "wx/msw/private.h"
  52
  53 #include <string.h>
  54 #include <stdlib.h>
  55 #include <sys/types.h>
  56
  57 #if wxUSE_IOSTREAMH
  58 #   include <fstream.h>
  59 #else
  60 #   include <fstream>
  61 #endif
  62
  63 #if wxUSE_RICHEDIT && !defined(__GNUWIN32_OLD__)
  64     #include <richedit.h>
  65 #endif
  66
  67 // ----------------------------------------------------------------------------
  68 // private classes
  69 // ----------------------------------------------------------------------------
  70
  71 #if wxUSE_RICHEDIT
  72
  73 // this module initializes RichEdit DLL if needed
  74 class wxRichEditModule : public wxModule
  75 {
  76 public:
  77     virtual bool OnInit();
  78     virtual void OnExit();
  79
  80     // get the version currently loaded, -1 if none
  81     static int GetLoadedVersion() { return ms_verRichEdit; }
  82
  83     // load the richedit DLL of at least of required version
  84     static bool Load(int version = 1);
  85
  86 private:
  87     // the handle to richedit DLL and the version of the DLL loaded
  88     static HINSTANCE ms_hRichEdit;
  89
  90     // the DLL version loaded or -1 if none
  91     static int ms_verRichEdit;
  92
  93     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
  94 };
  95
  96 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
  97 int       wxRichEditModule::ms_verRichEdit = -1;
  98
  99 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 100
 101 #endif // wxUSE_RICHEDIT
 102
 103 // ----------------------------------------------------------------------------
 104 // event tables and other macros
 105 // ----------------------------------------------------------------------------
 106
 107 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 108
 109 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 110     EVT_CHAR(wxTextCtrl::OnChar)
 111     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 112
 113     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 114     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 115     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 116     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 117     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 118
 119     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 120     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 121     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 122     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 123     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 124 #ifdef __WIN16__
 125     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 126 #endif
 127 END_EVENT_TABLE()
 128
 129
 130 // ============================================================================
 131 // implementation
 132 // ============================================================================
 133
 134 // ----------------------------------------------------------------------------
 135 // creation
 136 // ----------------------------------------------------------------------------
 137
 138 wxTextCtrl::wxTextCtrl()
 139 {
 140 #if wxUSE_RICHEDIT
 141     m_isRich = FALSE;
 142 #endif
 143 }
 144
 145 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 146                         const wxString& value,
 147                         const wxPoint& pos,
 148                         const wxSize& size,
 149                         long style,
 150                         const wxValidator& validator,
 151                         const wxString& name)
 152 {
 153     // base initialization
 154     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 155         return FALSE;
 156
 157     if ( parent )
 158         parent->AddChild(this);
 159
 160     // translate wxWin style flags to MSW ones, checking for consistency while
 161     // doing it
 162     long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
 163
 164     if ( m_windowStyle & wxCLIP_SIBLINGS )
 165         msStyle |= WS_CLIPSIBLINGS;
 166
 167     if ( m_windowStyle & wxTE_MULTILINE )
 168     {
 169         wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
 170                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 171
 172         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 173         if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
 174             msStyle |= WS_VSCROLL;
 175         m_windowStyle |= wxTE_PROCESS_ENTER;
 176     }
 177     else
 178         msStyle |= ES_AUTOHSCROLL;
 179
 180     if (m_windowStyle & wxHSCROLL)
 181         msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL);
 182
 183     if (m_windowStyle & wxTE_READONLY)
 184         msStyle |= ES_READONLY;
 185
 186     if (m_windowStyle & wxTE_PASSWORD) // hidden input
 187         msStyle |= ES_PASSWORD;
 188
 189    if (m_windowStyle & wxTE_AUTO_SCROLL)
 190         msStyle |=  ES_AUTOHSCROLL;
 191
 192
 193     // we always want the characters and the arrows
 194     m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
 195
 196     // we may have several different cases:
 197     // 1. normal case: both TAB and ENTER are used for dialog navigation
 198     // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
 199     //    control in the dialog
 200     // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
 201     // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
 202     //    the next control
 203     if ( m_windowStyle & wxTE_PROCESS_ENTER )
 204         m_lDlgCode |= DLGC_WANTMESSAGE;
 205     if ( m_windowStyle & wxTE_PROCESS_TAB )
 206         m_lDlgCode |= DLGC_WANTTAB;
 207
 208     // do create the control - either an EDIT or RICHEDIT
 209     wxString windowClass = wxT("EDIT");
 210
 211 #if wxUSE_RICHEDIT
 212     if ( m_windowStyle & wxTE_RICH )
 213     {
 214         static bool s_errorGiven = FALSE;   // MT-FIXME
 215
 216         // only give the error msg once if the DLL can't be loaded
 217         if ( !s_errorGiven )
 218         {
 219             // first try to load the RichEdit DLL (will do nothing if already
 220             // done)
 221             if ( !wxRichEditModule::Load() )
 222             {
 223                 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 224
 225                 s_errorGiven = TRUE;
 226             }
 227         }
 228
 229         if ( s_errorGiven )
 230         {
 231             m_isRich = FALSE;
 232         }
 233         else
 234         {
 235             msStyle |= ES_AUTOVSCROLL;
 236             m_isRich = TRUE;
 237
 238             int ver = wxRichEditModule::GetLoadedVersion();
 239             if ( ver == 1 )
 240             {
 241                 windowClass = wxT("RICHEDIT");
 242             }
 243             else
 244             {
 245 #ifndef RICHEDIT_CLASS
 246                 wxString RICHEDIT_CLASS;
 247                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), ver);
 248 #if wxUSE_UNICODE
 249                 RICHEDIT_CLASS += _T('W');
 250 #else // ANSI
 251                 RICHEDIT_CLASS += _T('A');
 252 #endif // Unicode/ANSI
 253 #endif // !RICHEDIT_CLASS
 254
 255                 windowClass = RICHEDIT_CLASS;
 256             }
 257         }
 258     }
 259     else
 260         m_isRich = FALSE;
 261 #endif // wxUSE_RICHEDIT
 262
 263     bool want3D;
 264     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 265
 266     // Even with extended styles, need to combine with WS_BORDER for them to
 267     // look right.
 268     if ( want3D || wxStyleHasBorder(m_windowStyle) )
 269         msStyle |= WS_BORDER;
 270
 271     // NB: don't use pos and size as CreateWindowEx arguments because they
 272     //     might be -1 in which case we should use the default values (and
 273     //     SetSize called below takes care of it)
 274     m_hWnd = (WXHWND)::CreateWindowEx(exStyle,
 275                                       windowClass.c_str(),
 276                                       NULL,
 277                                       msStyle,
 278                                       0, 0, 0, 0,
 279                                       GetHwndOf(parent),
 280                                       (HMENU)m_windowId,
 281                                       wxGetInstance(),
 282                                       NULL);
 283
 284     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create text ctrl") );
 285
 286 #if wxUSE_CTL3D
 287     if ( want3D )
 288     {
 289         Ctl3dSubclassCtl(GetHwnd());
 290         m_useCtl3D = TRUE;
 291     }
 292 #endif
 293
 294 #if wxUSE_RICHEDIT
 295     if (m_isRich)
 296     {
 297         // Have to enable events
 298         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0,
 299                       ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE);
 300     }
 301 #endif
 302
 303     SubclassWin(GetHWND());
 304
 305     // set font, position, size and initial value
 306     wxFont& fontParent = parent->GetFont();
 307     if ( fontParent.Ok() )
 308     {
 309         SetFont(fontParent);
 310     }
 311     else
 312     {
 313         SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
 314     }
 315
 316     // Causes a crash for Symantec C++ and WIN32 for some reason
 317 #if !(defined(__SC__) && defined(__WIN32__))
 318     if ( !value.IsEmpty() )
 319     {
 320         SetValue(value);
 321     }
 322 #endif
 323
 324     // set colours
 325     SetupColours();
 326
 327     SetSize(pos.x, pos.y, size.x, size.y);
 328
 329     return TRUE;
 330 }
 331
 332 // Make sure the window style (etc.) reflects the HWND style (roughly)
 333 void wxTextCtrl::AdoptAttributesFromHWND()
 334 {
 335   wxWindow::AdoptAttributesFromHWND();
 336
 337   HWND hWnd = GetHwnd();
 338   long style = GetWindowLong(hWnd, GWL_STYLE);
 339
 340   // retrieve the style to see whether this is an edit or richedit ctrl
 341 #if wxUSE_RICHEDIT
 342   wxChar buf[256];
 343
 344   GetClassName(hWnd, buf, WXSIZEOF(buf));
 345
 346   if ( wxStricmp(buf, wxT("EDIT")) == 0 )
 347     m_isRich = FALSE;
 348   else
 349     m_isRich = TRUE;
 350 #endif // wxUSE_RICHEDIT
 351
 352   if (style & ES_MULTILINE)
 353     m_windowStyle |= wxTE_MULTILINE;
 354   if (style & ES_PASSWORD)
 355     m_windowStyle |= wxTE_PASSWORD;
 356   if (style & ES_READONLY)
 357     m_windowStyle |= wxTE_READONLY;
 358   if (style & ES_WANTRETURN)
 359     m_windowStyle |= wxTE_PROCESS_ENTER;
 360 }
 361
 362 void wxTextCtrl::SetupColours()
 363 {
 364     wxColour bkgndColour;
 365 //    if (IsEditable() || (m_windowStyle & wxTE_MULTILINE))
 366         bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
 367 //    else
 368 //        bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
 369
 370     SetBackgroundColour(bkgndColour);
 371     SetForegroundColour(GetParent()->GetForegroundColour());
 372 }
 373
 374 // ----------------------------------------------------------------------------
 375 // set/get the controls text
 376 // ----------------------------------------------------------------------------
 377
 378 wxString wxTextCtrl::GetValue() const
 379 {
 380     // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
 381     // retrieving more than 64Kb under Win9x
 382 #if wxUSE_RICHEDIT
 383     if ( m_isRich )
 384     {
 385         wxString str;
 386
 387         int len = GetWindowTextLength(GetHwnd());
 388         if ( len )
 389         {
 390             // alloc one extra WORD as needed by the control
 391             wxChar *p = str.GetWriteBuf(++len);
 392
 393             TEXTRANGE textRange;
 394             textRange.chrg.cpMin = 0;
 395             textRange.chrg.cpMax = -1;
 396             textRange.lpstrText = p;
 397
 398             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 399
 400             // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
 401             // the newlines which is neither Unix nor Windows style (Win95 with
 402             // riched20.dll shows this behaviour) - convert it to something
 403             // reasonable
 404             for ( ; *p; p++ )
 405             {
 406                 if ( *p == _T('\r') )
 407                     *p = _T('\n');
 408             }
 409
 410             str.UngetWriteBuf();
 411         }
 412         //else: no text at all, leave the string empty
 413
 414         return str;
 415     }
 416 #endif // wxUSE_RICHEDIT
 417
 418     // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 419     // same one as above for consitency
 420     wxString str = wxGetWindowText(GetHWND());
 421
 422     return wxTextFile::Translate(str, wxTextFileType_Unix);
 423 }
 424
 425 void wxTextCtrl::SetValue(const wxString& value)
 426 {
 427     // if the text is long enough, it's faster to just set it instead of first
 428     // comparing it with the old one (chances are that it will be different
 429     // anyhow, this comparison is there to avoid flicker for small single-line
 430     // edit controls mostly)
 431     if ( (value.length() > 0x400) || (value != GetValue()) )
 432     {
 433         wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 434
 435         SetWindowText(GetHwnd(), valueDos.c_str());
 436
 437         // for compatibility with the GTK and because it is more logical, we
 438         // move the cursor to the end of the text after SetValue()
 439
 440         // GRG, Jun/2000: Changed this back after a lot of discussion
 441         //   in the lists. wxWindows 2.2 will have a set of flags to
 442         //   customize this behaviour.
 443         //SetInsertionPointEnd();
 444
 445         AdjustSpaceLimit();
 446     }
 447 }
 448
 449 void wxTextCtrl::WriteText(const wxString& value)
 450 {
 451     wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 452
 453     SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
 454
 455     AdjustSpaceLimit();
 456 }
 457
 458 void wxTextCtrl::AppendText(const wxString& text)
 459 {
 460     SetInsertionPointEnd();
 461     WriteText(text);
 462 }
 463
 464 void wxTextCtrl::Clear()
 465 {
 466     SetWindowText(GetHwnd(), wxT(""));
 467 }
 468
 469 // ----------------------------------------------------------------------------
 470 // Clipboard operations
 471 // ----------------------------------------------------------------------------
 472
 473 void wxTextCtrl::Copy()
 474 {
 475     if (CanCopy())
 476     {
 477         HWND hWnd = GetHwnd();
 478         SendMessage(hWnd, WM_COPY, 0, 0L);
 479     }
 480 }
 481
 482 void wxTextCtrl::Cut()
 483 {
 484     if (CanCut())
 485     {
 486         HWND hWnd = GetHwnd();
 487         SendMessage(hWnd, WM_CUT, 0, 0L);
 488     }
 489 }
 490
 491 void wxTextCtrl::Paste()
 492 {
 493     if (CanPaste())
 494     {
 495         HWND hWnd = GetHwnd();
 496         SendMessage(hWnd, WM_PASTE, 0, 0L);
 497     }
 498 }
 499
 500 bool wxTextCtrl::CanCopy() const
 501 {
 502     // Can copy if there's a selection
 503     long from, to;
 504     GetSelection(& from, & to);
 505     return (from != to) ;
 506 }
 507
 508 bool wxTextCtrl::CanCut() const
 509 {
 510     // Can cut if there's a selection
 511     long from, to;
 512     GetSelection(& from, & to);
 513     return (from != to) && (IsEditable());
 514 }
 515
 516 bool wxTextCtrl::CanPaste() const
 517 {
 518 #if wxUSE_RICHEDIT
 519     if (m_isRich)
 520     {
 521         int dataFormat = 0; // 0 == any format
 522         return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
 523     }
 524 #endif
 525     if (!IsEditable())
 526         return FALSE;
 527
 528     // Standard edit control: check for straight text on clipboard
 529     bool isTextAvailable = FALSE;
 530     if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 531     {
 532         isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
 533         ::CloseClipboard();
 534     }
 535
 536     return isTextAvailable;
 537 }
 538
 539 // ----------------------------------------------------------------------------
 540 // Accessors
 541 // ----------------------------------------------------------------------------
 542
 543 void wxTextCtrl::SetEditable(bool editable)
 544 {
 545     HWND hWnd = GetHwnd();
 546     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 547 }
 548
 549 void wxTextCtrl::SetInsertionPoint(long pos)
 550 {
 551     HWND hWnd = GetHwnd();
 552 #ifdef __WIN32__
 553 #if wxUSE_RICHEDIT
 554     if ( m_isRich)
 555     {
 556         CHARRANGE range;
 557         range.cpMin = pos;
 558         range.cpMax = pos;
 559         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
 560         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 561     }
 562     else
 563 #endif // wxUSE_RICHEDIT
 564     {
 565         SendMessage(hWnd, EM_SETSEL, pos, pos);
 566         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 567     }
 568 #else // Win16
 569     SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
 570 #endif // Win32/16
 571
 572     static const wxChar *nothing = _T("");
 573     SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
 574 }
 575
 576 void wxTextCtrl::SetInsertionPointEnd()
 577 {
 578     long pos = GetLastPosition();
 579     SetInsertionPoint(pos);
 580 }
 581
 582 long wxTextCtrl::GetInsertionPoint() const
 583 {
 584 #if wxUSE_RICHEDIT
 585     if (m_isRich)
 586     {
 587         CHARRANGE range;
 588         range.cpMin = 0;
 589         range.cpMax = 0;
 590         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 591         return range.cpMin;
 592     }
 593 #endif
 594
 595     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 596     return Pos & 0xFFFF;
 597 }
 598
 599 long wxTextCtrl::GetLastPosition() const
 600 {
 601     HWND hWnd = GetHwnd();
 602
 603     // Will always return a number > 0 (according to docs)
 604     int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
 605
 606     // This gets the char index for the _beginning_ of the last line
 607     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
 608
 609     // Get number of characters in the last line. We'll add this to the character
 610     // index for the last line, 1st position.
 611     int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
 612
 613     return (long)(charIndex + lineLength);
 614 }
 615
 616 // If the return values from and to are the same, there is no
 617 // selection.
 618 void wxTextCtrl::GetSelection(long* from, long* to) const
 619 {
 620 #if wxUSE_RICHEDIT
 621     if (m_isRich)
 622     {
 623         CHARRANGE charRange;
 624         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
 625
 626         *from = charRange.cpMin;
 627         *to = charRange.cpMax;
 628
 629         return;
 630     }
 631 #endif
 632     DWORD dwStart, dwEnd;
 633     WPARAM wParam = (WPARAM) (DWORD*) & dwStart; // receives starting position
 634     LPARAM lParam = (LPARAM) (DWORD*) & dwEnd;   // receives ending position
 635
 636     ::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
 637
 638     *from = dwStart;
 639     *to = dwEnd;
 640 }
 641
 642 bool wxTextCtrl::IsEditable() const
 643 {
 644     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 645
 646     return ((style & ES_READONLY) == 0);
 647 }
 648
 649 // ----------------------------------------------------------------------------
 650 // Editing
 651 // ----------------------------------------------------------------------------
 652
 653 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 654 {
 655 #if wxUSE_CLIPBOARD
 656     HWND hWnd = GetHwnd();
 657     long fromChar = from;
 658     long toChar = to;
 659
 660     // Set selection and remove it
 661 #ifdef __WIN32__
 662     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 663 #else
 664     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 665 #endif
 666     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 667
 668     // Now replace with 'value', by pasting.
 669     wxSetClipboardData(wxDF_TEXT, (wxObject *) (const wxChar *)value, 0, 0);
 670
 671     // Paste into edit control
 672     SendMessage(hWnd, WM_PASTE, (WPARAM)0, (LPARAM)0L);
 673 #else
 674     wxFAIL_MSG("wxTextCtrl::Replace not implemented if wxUSE_CLIPBOARD is 0.");
 675 #endif
 676 }
 677
 678 void wxTextCtrl::Remove(long from, long to)
 679 {
 680     HWND hWnd = GetHwnd();
 681     long fromChar = from;
 682     long toChar = to;
 683
 684     // Cut all selected text
 685 #ifdef __WIN32__
 686     SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
 687 #else
 688     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 689 #endif
 690     SendMessage(hWnd, WM_CUT, (WPARAM)0, (LPARAM)0);
 691 }
 692
 693 void wxTextCtrl::SetSelection(long from, long to)
 694 {
 695     HWND hWnd = GetHwnd();
 696     long fromChar = from;
 697     long toChar = to;
 698
 699     // if from and to are both -1, it means (in wxWindows) that all text should
 700     // be selected. Translate into Windows convention
 701     if ((from == -1) && (to == -1))
 702     {
 703       fromChar = 0;
 704       toChar = -1;
 705     }
 706
 707 #ifdef __WIN32__
 708     SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
 709     SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
 710 #else
 711     // WPARAM is 0: selection is scrolled into view
 712     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
 713 #endif
 714 }
 715
 716 bool wxTextCtrl::LoadFile(const wxString& file)
 717 {
 718     if ( wxTextCtrlBase::LoadFile(file) )
 719     {
 720         // update the size limit if needed
 721         AdjustSpaceLimit();
 722
 723         return TRUE;
 724     }
 725
 726     return FALSE;
 727 }
 728
 729 bool wxTextCtrl::IsModified() const
 730 {
 731     return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
 732 }
 733
 734 // Makes 'unmodified'
 735 void wxTextCtrl::DiscardEdits()
 736 {
 737     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
 738 }
 739
 740 int wxTextCtrl::GetNumberOfLines() const
 741 {
 742     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
 743 }
 744
 745 long wxTextCtrl::XYToPosition(long x, long y) const
 746 {
 747     HWND hWnd = GetHwnd();
 748
 749     // This gets the char index for the _beginning_ of this line
 750     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
 751     return (long)(x + charIndex);
 752 }
 753
 754 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 755 {
 756     HWND hWnd = GetHwnd();
 757
 758     // This gets the line number containing the character
 759     int lineNo;
 760 #if wxUSE_RICHEDIT
 761     if ( m_isRich )
 762     {
 763         lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
 764     }
 765     else
 766 #endif // wxUSE_RICHEDIT
 767         lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
 768
 769     if ( lineNo == -1 )
 770     {
 771         // no such line
 772         return FALSE;
 773     }
 774
 775     // This gets the char index for the _beginning_ of this line
 776     int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
 777     if ( charIndex == -1 )
 778     {
 779         return FALSE;
 780     }
 781
 782     // The X position must therefore be the different between pos and charIndex
 783     if ( x )
 784         *x = (long)(pos - charIndex);
 785     if ( y )
 786         *y = (long)lineNo;
 787
 788     return TRUE;
 789 }
 790
 791 void wxTextCtrl::ShowPosition(long pos)
 792 {
 793     HWND hWnd = GetHwnd();
 794
 795     // To scroll to a position, we pass the number of lines and characters
 796     // to scroll *by*. This means that we need to:
 797     // (1) Find the line position of the current line.
 798     // (2) Find the line position of pos.
 799     // (3) Scroll by (pos - current).
 800     // For now, ignore the horizontal scrolling.
 801
 802     // Is this where scrolling is relative to - the line containing the caret?
 803     // Or is the first visible line??? Try first visible line.
 804 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
 805
 806     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
 807
 808     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
 809
 810     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
 811
 812     if (linesToScroll != 0)
 813       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
 814 }
 815
 816 int wxTextCtrl::GetLineLength(long lineNo) const
 817 {
 818     long charIndex = XYToPosition(0, lineNo);
 819     int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
 820     return len;
 821 }
 822
 823 wxString wxTextCtrl::GetLineText(long lineNo) const
 824 {
 825     size_t len = (size_t)GetLineLength(lineNo) + 1;
 826
 827     // there must be at least enough place for the length WORD in the
 828     // buffer
 829     len += sizeof(WORD);
 830
 831     wxString str;
 832     wxChar *buf = str.GetWriteBuf(len);
 833
 834     *(WORD *)buf = (WORD)len;
 835     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
 836     buf[len] = 0;
 837
 838     str.UngetWriteBuf(len);
 839
 840     return str;
 841 }
 842
 843 // ----------------------------------------------------------------------------
 844 // Undo/redo
 845 // ----------------------------------------------------------------------------
 846
 847 void wxTextCtrl::Undo()
 848 {
 849     if (CanUndo())
 850     {
 851         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 852     }
 853 }
 854
 855 void wxTextCtrl::Redo()
 856 {
 857     if (CanRedo())
 858     {
 859         // Same as Undo, since Undo undoes the undo, i.e. a redo.
 860         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
 861     }
 862 }
 863
 864 bool wxTextCtrl::CanUndo() const
 865 {
 866     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 867 }
 868
 869 bool wxTextCtrl::CanRedo() const
 870 {
 871     return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
 872 }
 873
 874 // ----------------------------------------------------------------------------
 875 // implemenation details
 876 // ----------------------------------------------------------------------------
 877
 878 void wxTextCtrl::Command(wxCommandEvent & event)
 879 {
 880     SetValue(event.GetString());
 881     ProcessCommand (event);
 882 }
 883
 884 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 885 {
 886     // By default, load the first file into the text window.
 887     if (event.GetNumberOfFiles() > 0)
 888     {
 889         LoadFile(event.GetFiles()[0]);
 890     }
 891 }
 892
 893 void wxTextCtrl::OnChar(wxKeyEvent& event)
 894 {
 895     switch ( event.KeyCode() )
 896     {
 897         case WXK_RETURN:
 898             if ( !(m_windowStyle & wxTE_MULTILINE) )
 899             {
 900                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 901                 InitCommandEvent(event);
 902                 event.SetString(GetValue());
 903                 if ( GetEventHandler()->ProcessEvent(event) )
 904                     return;
 905             }
 906             //else: multiline controls need Enter for themselves
 907
 908             break;
 909
 910         case WXK_TAB:
 911             // always produce navigation event - even if we process TAB
 912             // ourselves the fact that we got here means that the user code
 913             // decided to skip processing of this TAB - probably to let it
 914             // do its default job.
 915             {
 916                 wxNavigationKeyEvent eventNav;
 917                 eventNav.SetDirection(!event.ShiftDown());
 918                 eventNav.SetWindowChange(event.ControlDown());
 919                 eventNav.SetEventObject(this);
 920
 921                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
 922                     return;
 923             }
 924             break;
 925     }
 926
 927     // no, we didn't process it
 928     event.Skip();
 929 }
 930
 931 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 932 {
 933     switch (param)
 934     {
 935         case EN_SETFOCUS:
 936         case EN_KILLFOCUS:
 937             {
 938                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
 939                         : wxEVT_SET_FOCUS,
 940                         m_windowId);
 941                 event.SetEventObject( this );
 942                 GetEventHandler()->ProcessEvent(event);
 943             }
 944             break;
 945
 946         case EN_CHANGE:
 947             {
 948                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
 949                 InitCommandEvent(event);
 950                 event.SetString(GetValue());
 951                 ProcessCommand(event);
 952             }
 953             break;
 954
 955         case EN_MAXTEXT:
 956             // the text size limit has been hit - increase it
 957             AdjustSpaceLimit();
 958             break;
 959
 960             // the other notification messages are not processed
 961         case EN_UPDATE:
 962         case EN_ERRSPACE:
 963         case EN_HSCROLL:
 964         case EN_VSCROLL:
 965             return FALSE;
 966         default:
 967             return FALSE;
 968     }
 969
 970     // processed
 971     return TRUE;
 972 }
 973
 974 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
 975 #if wxUSE_CTL3D
 976                                WXUINT message,
 977                                WXWPARAM wParam,
 978                                WXLPARAM lParam
 979 #else
 980                                WXUINT WXUNUSED(message),
 981                                WXWPARAM WXUNUSED(wParam),
 982                                WXLPARAM WXUNUSED(lParam)
 983 #endif
 984     )
 985 {
 986 #if wxUSE_CTL3D
 987     if ( m_useCtl3D )
 988     {
 989         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 990         return (WXHBRUSH) hbrush;
 991     }
 992 #endif // wxUSE_CTL3D
 993
 994     HDC hdc = (HDC)pDC;
 995     if (GetParent()->GetTransparentBackground())
 996         SetBkMode(hdc, TRANSPARENT);
 997     else
 998         SetBkMode(hdc, OPAQUE);
 999
1000     wxColour colBack = GetBackgroundColour();
1001
1002     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1003         colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1004
1005     ::SetBkColor(hdc, wxColourToRGB(colBack));
1006     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1007
1008     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1009
1010     return (WXHBRUSH)brush->GetResourceHandle();
1011 }
1012
1013 // In WIN16, need to override normal erasing because
1014 // Ctl3D doesn't use the wxWindows background colour.
1015 #ifdef __WIN16__
1016 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1017 {
1018     wxColour col(m_backgroundColour);
1019
1020 #if wxUSE_CTL3D
1021     if (m_useCtl3D)
1022         col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1023 #endif
1024
1025     RECT rect;
1026     ::GetClientRect(GetHwnd(), &rect);
1027
1028     COLORREF ref = PALETTERGB(col.Red(),
1029                               col.Green(),
1030                               col.Blue());
1031     HBRUSH hBrush = ::CreateSolidBrush(ref);
1032     if ( !hBrush )
1033         wxLogLastError(wxT("CreateSolidBrush"));
1034
1035     HDC hdc = (HDC)event.GetDC()->GetHDC();
1036
1037     int mode = ::SetMapMode(hdc, MM_TEXT);
1038
1039     ::FillRect(hdc, &rect, hBrush);
1040     ::DeleteObject(hBrush);
1041     ::SetMapMode(hdc, mode);
1042
1043 }
1044 #endif
1045
1046 void wxTextCtrl::AdjustSpaceLimit()
1047 {
1048 #ifndef __WIN16__
1049     unsigned int len = ::GetWindowTextLength(GetHwnd()),
1050     limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1051     if ( len >= limit )
1052     {
1053         limit = len + 0x8000;    // 32Kb
1054
1055 #if wxUSE_RICHEDIT
1056         if ( m_isRich )
1057         {
1058             // as a nice side effect, this also allows passing limit > 64Kb
1059             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1060         }
1061         else
1062 #endif // wxUSE_RICHEDIT
1063         {
1064             if ( limit > 0xffff )
1065             {
1066                 // this will set it to a platform-dependent maximum (much more
1067                 // than 64Kb under NT)
1068                 limit = 0;
1069             }
1070
1071             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1072         }
1073     }
1074 #endif // !Win16
1075 }
1076
1077 bool wxTextCtrl::AcceptsFocus() const
1078 {
1079     // we don't want focus if we can't be edited
1080     return IsEditable() && wxControl::AcceptsFocus();
1081 }
1082
1083 wxSize wxTextCtrl::DoGetBestSize() const
1084 {
1085     int cx, cy;
1086     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1087
1088     int wText = DEFAULT_ITEM_WIDTH;
1089
1090     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1091     if ( m_windowStyle & wxTE_MULTILINE )
1092     {
1093         hText *= wxMax(GetNumberOfLines(), 5);
1094     }
1095     //else: for single line control everything is ok
1096
1097     return wxSize(wText, hText);
1098 }
1099
1100 // ----------------------------------------------------------------------------
1101 // standard handlers for standard edit menu events
1102 // ----------------------------------------------------------------------------
1103
1104 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1105 {
1106     Cut();
1107 }
1108
1109 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1110 {
1111     Copy();
1112 }
1113
1114 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1115 {
1116     Paste();
1117 }
1118
1119 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1120 {
1121     Undo();
1122 }
1123
1124 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1125 {
1126     Redo();
1127 }
1128
1129 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1130 {
1131     event.Enable( CanCut() );
1132 }
1133
1134 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1135 {
1136     event.Enable( CanCopy() );
1137 }
1138
1139 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1140 {
1141     event.Enable( CanPaste() );
1142 }
1143
1144 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1145 {
1146     event.Enable( CanUndo() );
1147 }
1148
1149 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1150 {
1151     event.Enable( CanRedo() );
1152 }
1153
1154 // ----------------------------------------------------------------------------
1155 // colour setting for the rich edit controls
1156 // ----------------------------------------------------------------------------
1157
1158 #if wxUSE_RICHEDIT
1159
1160 // Watcom C++ doesn't define this
1161 #ifndef SCF_ALL
1162 #define SCF_ALL 0x0004
1163 #endif
1164
1165 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1166 {
1167     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1168     {
1169         // colour didn't really change
1170         return FALSE;
1171     }
1172
1173     if ( IsRich() )
1174     {
1175         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1176         // EM_SETBKGNDCOLOR additionally
1177         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1178     }
1179
1180     return TRUE;
1181 }
1182
1183 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1184 {
1185     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1186     {
1187         // colour didn't really change
1188         return FALSE;
1189     }
1190
1191     if ( IsRich() )
1192     {
1193         // change the colour of everything
1194         CHARFORMAT cf;
1195         wxZeroMemory(cf);
1196         cf.cbSize = sizeof(cf);
1197         cf.dwMask = CFM_COLOR;
1198         cf.crTextColor = wxColourToRGB(colour);
1199         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1200     }
1201
1202     return TRUE;
1203 }
1204
1205 #endif // wxUSE_RICHEDIT
1206
1207 // ----------------------------------------------------------------------------
1208 // wxRichEditModule
1209 // ----------------------------------------------------------------------------
1210
1211 #if wxUSE_RICHEDIT
1212
1213 bool wxRichEditModule::OnInit()
1214 {
1215     // don't do anything - we will load it when needed
1216     return TRUE;
1217 }
1218
1219 void wxRichEditModule::OnExit()
1220 {
1221     if ( ms_hRichEdit )
1222     {
1223         FreeLibrary(ms_hRichEdit);
1224     }
1225 }
1226
1227 /* static */
1228 bool wxRichEditModule::Load(int version)
1229 {
1230     wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1231                  _T("incorrect richedit control version requested") );
1232
1233     if ( version <= ms_verRichEdit )
1234     {
1235         // we've already got this or better
1236         return TRUE;
1237     }
1238
1239     if ( ms_hRichEdit )
1240     {
1241         ::FreeLibrary(ms_hRichEdit);
1242     }
1243
1244     // always try load riched20.dll first - like this we won't have to reload
1245     // it later if we're first asked for RE 1 and then for RE 2 or 3
1246     wxString dllname = _T("riched20.dll");
1247     ms_hRichEdit = ::LoadLibrary(dllname);
1248     ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1249
1250     if ( !ms_hRichEdit && (version == 1) )
1251     {
1252         // fall back to RE 1
1253         dllname = _T("riched32.dll");
1254         ms_hRichEdit = ::LoadLibrary(dllname);
1255         ms_verRichEdit = 1;
1256     }
1257
1258     if ( !ms_hRichEdit )
1259     {
1260         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1261
1262         ms_verRichEdit = -1;
1263
1264         return FALSE;
1265     }
1266
1267     return TRUE;
1268 }
1269
1270 #endif // wxUSE_RICHEDIT
1271