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