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[wxWidgets.git] / 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 #if wxUSE_TEXTCTRL
32
33 #ifndef WX_PRECOMP
34 #include "wx/textctrl.h"
35 #include "wx/settings.h"
36 #include "wx/brush.h"
37 #include "wx/utils.h"
38 #include "wx/intl.h"
39 #include "wx/log.h"
40 #include "wx/app.h"
41 #endif
42
43 #include "wx/module.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
55 #include <string.h>
56 #include <stdlib.h>
57 #include <sys/types.h>
58
59 #if wxUSE_RICHEDIT && (!defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__))
60 #include <richedit.h>
61 #endif
62
63 // old mingw32 doesn't define this
64 #ifndef CFM_CHARSET
65 #define CFM_CHARSET 0x08000000
66 #endif // CFM_CHARSET
67
68 #ifndef CFM_BACKCOLOR
69 #define CFM_BACKCOLOR 0x04000000
70 #endif
71
72 // cygwin does not have these defined for richedit
73 #ifndef ENM_LINK
74 #define ENM_LINK 0x04000000
75 #endif
76
77 #ifndef EM_AUTOURLDETECT
78 #define EM_AUTOURLDETECT (WM_USER + 91)
79 #endif
80
81 #ifndef EN_LINK
82 #define EN_LINK 0x070b
83
84 typedef struct _enlink
85 {
86 NMHDR nmhdr;
87 UINT msg;
88 WPARAM wParam;
89 LPARAM lParam;
90 CHARRANGE chrg;
91 } ENLINK;
92 #endif // ENLINK
93
94 // ----------------------------------------------------------------------------
95 // private functions
96 // ----------------------------------------------------------------------------
97
98 #if wxUSE_RICHEDIT
99
100 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
101
102 #endif // wxUSE_RICHEDIT
103
104 // ----------------------------------------------------------------------------
105 // private classes
106 // ----------------------------------------------------------------------------
107
108 #if wxUSE_RICHEDIT
109
110 // this module initializes RichEdit DLL if needed
111 class wxRichEditModule : public wxModule
112 {
113 public:
114 virtual bool OnInit();
115 virtual void OnExit();
116
117 // get the version currently loaded, -1 if none
118 static int GetLoadedVersion() { return ms_verRichEdit; }
119
120 // load the richedit DLL of at least of required version
121 static bool Load(int version = 1);
122
123 private:
124 // the handle to richedit DLL and the version of the DLL loaded
125 static HINSTANCE ms_hRichEdit;
126
127 // the DLL version loaded or -1 if none
128 static int ms_verRichEdit;
129
130 DECLARE_DYNAMIC_CLASS(wxRichEditModule)
131 };
132
133 HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
134 int wxRichEditModule::ms_verRichEdit = -1;
135
136 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
137
138 #endif // wxUSE_RICHEDIT
139
140 // ----------------------------------------------------------------------------
141 // event tables and other macros
142 // ----------------------------------------------------------------------------
143
144 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
145
146 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
147 EVT_CHAR(wxTextCtrl::OnChar)
148 EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
149
150 EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
151 EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
152 EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
153 EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
154 EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
155
156 EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
157 EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
158 EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
159 EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
160 EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
161 #ifdef __WIN16__
162 EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
163 #endif
164 END_EVENT_TABLE()
165
166 // ============================================================================
167 // implementation
168 // ============================================================================
169
170 // ----------------------------------------------------------------------------
171 // creation
172 // ----------------------------------------------------------------------------
173
174 void wxTextCtrl::Init()
175 {
176 #if wxUSE_RICHEDIT
177 m_verRichEdit = 0;
178 #endif
179 }
180
181 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
182 const wxString& value,
183 const wxPoint& pos,
184 const wxSize& size,
185 long style,
186 const wxValidator& validator,
187 const wxString& name)
188 {
189 // base initialization
190 if ( !CreateBase(parent, id, pos, size, style, validator, name) )
191 return FALSE;
192
193 if ( parent )
194 parent->AddChild(this);
195
196 // translate wxWin style flags to MSW ones, checking for consistency while
197 // doing it
198 long msStyle = ES_LEFT | WS_TABSTOP;
199
200 if ( m_windowStyle & wxCLIP_SIBLINGS )
201 msStyle |= WS_CLIPSIBLINGS;
202
203 if ( m_windowStyle & wxTE_MULTILINE )
204 {
205 wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
206 wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
207
208 msStyle |= ES_MULTILINE | ES_WANTRETURN;
209 if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
210 msStyle |= WS_VSCROLL;
211 m_windowStyle |= wxTE_PROCESS_ENTER;
212 }
213 else // !multiline
214 {
215 // there is really no reason to not have this style for single line
216 // text controls
217 msStyle |= ES_AUTOHSCROLL;
218 }
219
220 if ( m_windowStyle & wxHSCROLL )
221 msStyle |= WS_HSCROLL | ES_AUTOHSCROLL;
222
223 if ( m_windowStyle & wxTE_READONLY )
224 msStyle |= ES_READONLY;
225
226 if ( m_windowStyle & wxTE_PASSWORD )
227 msStyle |= ES_PASSWORD;
228
229 if ( m_windowStyle & wxTE_AUTO_SCROLL )
230 msStyle |= ES_AUTOHSCROLL;
231
232 if ( m_windowStyle & wxTE_NOHIDESEL )
233 msStyle |= ES_NOHIDESEL;
234
235 // we always want the characters and the arrows
236 m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
237
238 // we may have several different cases:
239 // 1. normal case: both TAB and ENTER are used for dialog navigation
240 // 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
241 // control in the dialog
242 // 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
243 // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
244 // the next control
245 if ( m_windowStyle & wxTE_PROCESS_ENTER )
246 m_lDlgCode |= DLGC_WANTMESSAGE;
247 if ( m_windowStyle & wxTE_PROCESS_TAB )
248 m_lDlgCode |= DLGC_WANTTAB;
249
250 // do create the control - either an EDIT or RICHEDIT
251 wxString windowClass = wxT("EDIT");
252
253 #if wxUSE_RICHEDIT
254 if ( m_windowStyle & wxTE_RICH )
255 {
256 static bool s_errorGiven = FALSE; // MT-FIXME
257
258 // only give the error msg once if the DLL can't be loaded
259 if ( !s_errorGiven )
260 {
261 // first try to load the RichEdit DLL (will do nothing if already
262 // done)
263 if ( !wxRichEditModule::Load() )
264 {
265 wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
266
267 s_errorGiven = TRUE;
268 }
269 }
270
271 if ( !s_errorGiven )
272 {
273 msStyle |= ES_AUTOVSCROLL;
274
275 m_verRichEdit = wxRichEditModule::GetLoadedVersion();
276 if ( m_verRichEdit == 1 )
277 {
278 windowClass = wxT("RICHEDIT");
279 }
280 else
281 {
282 #ifndef RICHEDIT_CLASS
283 wxString RICHEDIT_CLASS;
284 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
285 #if wxUSE_UNICODE
286 RICHEDIT_CLASS += _T('W');
287 #else // ANSI
288 RICHEDIT_CLASS += _T('A');
289 #endif // Unicode/ANSI
290 #endif // !RICHEDIT_CLASS
291
292 windowClass = RICHEDIT_CLASS;
293 }
294 }
295 }
296 #endif // wxUSE_RICHEDIT
297
298 // we need to turn '\n's into "\r\n"s for the multiline controls
299 wxString valueWin;
300 if ( m_windowStyle & wxTE_MULTILINE )
301 {
302 valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
303 }
304 else // single line
305 {
306 valueWin = value;
307 }
308
309 if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
310 return FALSE;
311
312 SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
313
314 #if wxUSE_RICHEDIT
315 if ( IsRich() )
316 {
317 // have to enable events manually
318 LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
319
320 if ( m_windowStyle & wxTE_AUTO_URL )
321 {
322 mask |= ENM_LINK;
323
324 ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
325 }
326
327 ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
328 }
329 #endif // wxUSE_RICHEDIT
330
331 return TRUE;
332 }
333
334 // Make sure the window style (etc.) reflects the HWND style (roughly)
335 void wxTextCtrl::AdoptAttributesFromHWND()
336 {
337 wxWindow::AdoptAttributesFromHWND();
338
339 HWND hWnd = GetHwnd();
340 long style = ::GetWindowLong(hWnd, GWL_STYLE);
341
342 // retrieve the style to see whether this is an edit or richedit ctrl
343 #if wxUSE_RICHEDIT
344 wxString classname = wxGetWindowClass(GetHWND());
345
346 if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
347 {
348 m_verRichEdit = 0;
349 }
350 else // rich edit?
351 {
352 wxChar c;
353 if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
354 {
355 wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
356
357 m_verRichEdit = 0;
358 }
359 }
360 #endif // wxUSE_RICHEDIT
361
362 if (style & ES_MULTILINE)
363 m_windowStyle |= wxTE_MULTILINE;
364 if (style & ES_PASSWORD)
365 m_windowStyle |= wxTE_PASSWORD;
366 if (style & ES_READONLY)
367 m_windowStyle |= wxTE_READONLY;
368 if (style & ES_WANTRETURN)
369 m_windowStyle |= wxTE_PROCESS_ENTER;
370 }
371
372 // ----------------------------------------------------------------------------
373 // set/get the controls text
374 // ----------------------------------------------------------------------------
375
376 wxString wxTextCtrl::GetValue() const
377 {
378 // we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
379 // retrieving more than 64Kb under Win9x
380 #if wxUSE_RICHEDIT
381 if ( IsRich() )
382 {
383 wxString str;
384
385 int len = GetWindowTextLength(GetHwnd());
386 if ( len )
387 {
388 // alloc one extra WORD as needed by the control
389 wxChar *p = str.GetWriteBuf(++len);
390
391 TEXTRANGE textRange;
392 textRange.chrg.cpMin = 0;
393 textRange.chrg.cpMax = -1;
394 textRange.lpstrText = p;
395
396 (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
397
398 // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
399 // the newlines which is neither Unix nor Windows style (Win95 with
400 // riched20.dll shows this behaviour) - convert it to something
401 // reasonable
402 for ( ; *p; p++ )
403 {
404 if ( *p == _T('\r') )
405 *p = _T('\n');
406 }
407
408 str.UngetWriteBuf();
409 }
410 //else: no text at all, leave the string empty
411
412 return str;
413 }
414 #endif // wxUSE_RICHEDIT
415
416 // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
417 // same one as above for consitency
418 wxString str = wxGetWindowText(GetHWND());
419
420 return wxTextFile::Translate(str, wxTextFileType_Unix);
421 }
422
423 void wxTextCtrl::SetValue(const wxString& value)
424 {
425 // if the text is long enough, it's faster to just set it instead of first
426 // comparing it with the old one (chances are that it will be different
427 // anyhow, this comparison is there to avoid flicker for small single-line
428 // edit controls mostly)
429 if ( (value.length() > 0x400) || (value != GetValue()) )
430 {
431 // it is simpler to do this but it could be more efficient to reproduce
432 // WriteText() logic here
433 Clear();
434
435 WriteText(value);
436
437 // for compatibility, don't move the cursor when doing SetValue()
438 SetInsertionPoint(0);
439 }
440 }
441
442 #if wxUSE_RICHEDIT
443
444 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
445 {
446 *pcb = 0;
447
448 wchar_t *wbuf = (wchar_t *)buf;
449 const wchar_t *wpc = *(const wchar_t **)dwCookie;
450 while ( cb && *wpc )
451 {
452 *wbuf++ = *wpc++;
453
454 cb -= sizeof(wchar_t);
455 (*pcb) += sizeof(wchar_t);
456 }
457
458 *(const wchar_t **)dwCookie = wpc;
459
460 return 0;
461 }
462
463 extern long wxEncodingToCodepage(wxFontEncoding encoding); // from strconv.cpp
464
465 bool wxTextCtrl::StreamIn(const wxString& value, wxFontEncoding encoding)
466 {
467 // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
468 // text in the non default charset - otherwise it thinks it knows better
469 // than we do and always shows it in the default one
470
471 // first get the Windows code page for this encoding
472 long codepage = wxEncodingToCodepage(encoding);
473 if ( codepage == -1 )
474 {
475 // unknown encoding
476 return FALSE;
477 }
478
479 // next translate to Unicode using this code page
480 int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
481 wxWCharBuffer wchBuf(len);
482 if ( !::MultiByteToWideChar(codepage, 0, value, -1,
483 (wchar_t *)wchBuf.data(), len) )
484 {
485 wxLogLastError(_T("MultiByteToWideChar"));
486 }
487
488 // finally, stream it in the control
489 const wchar_t *wpc = wchBuf;
490
491 EDITSTREAM eds;
492 wxZeroMemory(eds);
493 eds.dwCookie = (DWORD)&wpc;
494 eds.pfnCallback = wxRichEditStreamIn;
495
496 if ( !::SendMessage(GetHwnd(), EM_STREAMIN,
497 SF_TEXT | SF_UNICODE | SFF_SELECTION,
498 (LPARAM)&eds) || eds.dwError )
499 {
500 wxLogLastError(_T("EM_STREAMIN"));
501
502 return FALSE;
503 }
504
505 return TRUE;
506 }
507
508 #endif // wxUSE_RICHEDIT
509
510 void wxTextCtrl::WriteText(const wxString& value)
511 {
512 wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
513
514 #if wxUSE_RICHEDIT
515 // there are several complications with the rich edit controls here
516 bool done = FALSE;
517 if ( IsRich() )
518 {
519 // first, ensure that the new text will be in the default style
520 if ( !m_defaultStyle.IsDefault() )
521 {
522 long start, end;
523 GetSelection(&start, &end);
524 SetStyle(start, end, m_defaultStyle );
525 }
526
527 // next check if the text we're inserting must be shown in a non
528 // default charset -- this only works for RichEdit > 1.0
529 if ( GetRichVersion() > 1 )
530 {
531 wxFont font = m_defaultStyle.GetFont();
532 if ( !font.Ok() )
533 font = GetFont();
534
535 if ( font.Ok() )
536 {
537 wxFontEncoding encoding = font.GetEncoding();
538 if ( encoding != wxFONTENCODING_SYSTEM )
539 {
540 done = StreamIn(valueDos, encoding);
541 }
542 }
543 }
544 }
545
546 if ( !done )
547 #endif // wxUSE_RICHEDIT
548 {
549 ::SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
550 }
551
552 AdjustSpaceLimit();
553 }
554
555 void wxTextCtrl::AppendText(const wxString& text)
556 {
557 SetInsertionPointEnd();
558
559 WriteText(text);
560 }
561
562 void wxTextCtrl::Clear()
563 {
564 ::SetWindowText(GetHwnd(), wxT(""));
565 }
566
567 // ----------------------------------------------------------------------------
568 // Clipboard operations
569 // ----------------------------------------------------------------------------
570
571 void wxTextCtrl::Copy()
572 {
573 if (CanCopy())
574 {
575 HWND hWnd = GetHwnd();
576 SendMessage(hWnd, WM_COPY, 0, 0L);
577 }
578 }
579
580 void wxTextCtrl::Cut()
581 {
582 if (CanCut())
583 {
584 HWND hWnd = GetHwnd();
585 SendMessage(hWnd, WM_CUT, 0, 0L);
586 }
587 }
588
589 void wxTextCtrl::Paste()
590 {
591 if (CanPaste())
592 {
593 HWND hWnd = GetHwnd();
594 SendMessage(hWnd, WM_PASTE, 0, 0L);
595 }
596 }
597
598 bool wxTextCtrl::CanCopy() const
599 {
600 // Can copy if there's a selection
601 long from, to;
602 GetSelection(& from, & to);
603 return (from != to) ;
604 }
605
606 bool wxTextCtrl::CanCut() const
607 {
608 // Can cut if there's a selection
609 long from, to;
610 GetSelection(& from, & to);
611 return (from != to) && (IsEditable());
612 }
613
614 bool wxTextCtrl::CanPaste() const
615 {
616 if ( !IsEditable() )
617 return FALSE;
618
619 #if wxUSE_RICHEDIT
620 if ( IsRich() )
621 {
622 UINT cf = 0; // 0 == any format
623
624 return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
625 }
626 #endif // wxUSE_RICHEDIT
627
628 // Standard edit control: check for straight text on clipboard
629 if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
630 return FALSE;
631
632 bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
633 ::CloseClipboard();
634
635 return isTextAvailable;
636 }
637
638 // ----------------------------------------------------------------------------
639 // Accessors
640 // ----------------------------------------------------------------------------
641
642 void wxTextCtrl::SetEditable(bool editable)
643 {
644 HWND hWnd = GetHwnd();
645 SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
646 }
647
648 void wxTextCtrl::SetInsertionPoint(long pos)
649 {
650 SetSelection(pos, pos);
651
652 #if wxUSE_RICHEDIT
653 if ( !IsRich() )
654 #endif
655 {
656 static const wxChar *nothing = _T("");
657 SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)nothing);
658 }
659 }
660
661 void wxTextCtrl::SetInsertionPointEnd()
662 {
663 long pos = GetLastPosition();
664 SetInsertionPoint(pos);
665 }
666
667 long wxTextCtrl::GetInsertionPoint() const
668 {
669 #if wxUSE_RICHEDIT
670 if ( IsRich() )
671 {
672 CHARRANGE range;
673 range.cpMin = 0;
674 range.cpMax = 0;
675 SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
676 return range.cpMin;
677 }
678 #endif // wxUSE_RICHEDIT
679
680 DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
681 return Pos & 0xFFFF;
682 }
683
684 long wxTextCtrl::GetLastPosition() const
685 {
686 HWND hWnd = GetHwnd();
687
688 // Will always return a number > 0 (according to docs)
689 int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
690
691 // This gets the char index for the _beginning_ of the last line
692 int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
693
694 // Get number of characters in the last line. We'll add this to the character
695 // index for the last line, 1st position.
696 int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
697
698 return (long)(charIndex + lineLength);
699 }
700
701 // If the return values from and to are the same, there is no
702 // selection.
703 void wxTextCtrl::GetSelection(long* from, long* to) const
704 {
705 #if wxUSE_RICHEDIT
706 if ( IsRich() )
707 {
708 CHARRANGE charRange;
709 ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
710
711 *from = charRange.cpMin;
712 *to = charRange.cpMax;
713 }
714 else
715 #endif // !wxUSE_RICHEDIT
716 {
717 DWORD dwStart, dwEnd;
718 ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
719
720 *from = dwStart;
721 *to = dwEnd;
722 }
723 }
724
725 wxString wxTextCtrl::GetStringSelection() const
726 {
727 // the base class version works correctly for the rich text controls
728 // because there the lines are terminated with just '\r' which means that
729 // the string length is not changed in the result of the translations doen
730 // in GetValue() but for the normal ones when we replace "\r\n" with '\n'
731 // we break the indices
732 #if wxUSE_RICHEDIT
733 if ( IsRich() )
734 return wxTextCtrlBase::GetStringSelection();
735 #endif // wxUSE_RICHEDIT
736
737 long from, to;
738 GetSelection(&from, &to);
739
740 wxString str;
741 if ( from < to )
742 {
743 str = wxGetWindowText(GetHWND()).Mid(from, to - from);
744
745 // and now that we have the correct selection, convert it to the
746 // correct format
747 str = wxTextFile::Translate(str, wxTextFileType_Unix);
748 }
749
750 return str;
751 }
752
753 bool wxTextCtrl::IsEditable() const
754 {
755 long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
756
757 return ((style & ES_READONLY) == 0);
758 }
759
760 // ----------------------------------------------------------------------------
761 // selection
762 // ----------------------------------------------------------------------------
763
764 void wxTextCtrl::SetSelection(long from, long to)
765 {
766 DoSetSelection(from, to);
767 }
768
769 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
770 {
771 // if from and to are both -1, it means (in wxWindows) that all text should
772 // be selected - translate into Windows convention
773 if ( (from == -1) && (to == -1) )
774 {
775 from = 0;
776 to = -1;
777 }
778
779 HWND hWnd = GetHwnd();
780
781 #ifdef __WIN32__
782 #if wxUSE_RICHEDIT
783 if ( IsRich() )
784 {
785 CHARRANGE range;
786 range.cpMin = from;
787 range.cpMax = to;
788 SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
789 }
790 else
791 #endif // wxUSE_RICHEDIT
792 {
793 SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
794 }
795
796 if ( scrollCaret )
797 {
798 SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
799 }
800 #else // Win16
801 // WPARAM is 0: selection is scrolled into view
802 SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
803 #endif // Win32/16
804 }
805
806 // ----------------------------------------------------------------------------
807 // Editing
808 // ----------------------------------------------------------------------------
809
810 void wxTextCtrl::Replace(long from, long to, const wxString& value)
811 {
812 // Set selection and remove it
813 DoSetSelection(from, to, FALSE);
814
815 SendMessage(GetHwnd(), EM_REPLACESEL,
816 #ifdef __WIN32__
817 TRUE,
818 #else
819 FALSE,
820 #endif
821 (LPARAM)value.c_str());
822 }
823
824 void wxTextCtrl::Remove(long from, long to)
825 {
826 Replace(from, to, _T(""));
827 }
828
829 bool wxTextCtrl::LoadFile(const wxString& file)
830 {
831 if ( wxTextCtrlBase::LoadFile(file) )
832 {
833 // update the size limit if needed
834 AdjustSpaceLimit();
835
836 return TRUE;
837 }
838
839 return FALSE;
840 }
841
842 bool wxTextCtrl::IsModified() const
843 {
844 return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
845 }
846
847 // Makes 'unmodified'
848 void wxTextCtrl::DiscardEdits()
849 {
850 SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
851 }
852
853 int wxTextCtrl::GetNumberOfLines() const
854 {
855 return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
856 }
857
858 long wxTextCtrl::XYToPosition(long x, long y) const
859 {
860 HWND hWnd = GetHwnd();
861
862 // This gets the char index for the _beginning_ of this line
863 int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
864 return (long)(x + charIndex);
865 }
866
867 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
868 {
869 HWND hWnd = GetHwnd();
870
871 // This gets the line number containing the character
872 int lineNo;
873 #if wxUSE_RICHEDIT
874 if ( IsRich() )
875 {
876 lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
877 }
878 else
879 #endif // wxUSE_RICHEDIT
880 lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
881
882 if ( lineNo == -1 )
883 {
884 // no such line
885 return FALSE;
886 }
887
888 // This gets the char index for the _beginning_ of this line
889 int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
890 if ( charIndex == -1 )
891 {
892 return FALSE;
893 }
894
895 // The X position must therefore be the different between pos and charIndex
896 if ( x )
897 *x = (long)(pos - charIndex);
898 if ( y )
899 *y = (long)lineNo;
900
901 return TRUE;
902 }
903
904 void wxTextCtrl::ShowPosition(long pos)
905 {
906 HWND hWnd = GetHwnd();
907
908 // To scroll to a position, we pass the number of lines and characters
909 // to scroll *by*. This means that we need to:
910 // (1) Find the line position of the current line.
911 // (2) Find the line position of pos.
912 // (3) Scroll by (pos - current).
913 // For now, ignore the horizontal scrolling.
914
915 // Is this where scrolling is relative to - the line containing the caret?
916 // Or is the first visible line??? Try first visible line.
917 // int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
918
919 int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
920
921 int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
922
923 int linesToScroll = specifiedLineLineNo - currentLineLineNo;
924
925 if (linesToScroll != 0)
926 (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
927 }
928
929 int wxTextCtrl::GetLineLength(long lineNo) const
930 {
931 long charIndex = XYToPosition(0, lineNo);
932 int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
933 return len;
934 }
935
936 wxString wxTextCtrl::GetLineText(long lineNo) const
937 {
938 size_t len = (size_t)GetLineLength(lineNo) + 1;
939
940 // there must be at least enough place for the length WORD in the
941 // buffer
942 len += sizeof(WORD);
943
944 wxString str;
945 wxChar *buf = str.GetWriteBuf(len);
946
947 *(WORD *)buf = (WORD)len;
948 len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
949 buf[len] = 0;
950
951 str.UngetWriteBuf(len);
952
953 return str;
954 }
955
956 void wxTextCtrl::SetMaxLength(unsigned long len)
957 {
958 ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
959 }
960
961 // ----------------------------------------------------------------------------
962 // Undo/redo
963 // ----------------------------------------------------------------------------
964
965 void wxTextCtrl::Undo()
966 {
967 if (CanUndo())
968 {
969 ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
970 }
971 }
972
973 void wxTextCtrl::Redo()
974 {
975 if (CanRedo())
976 {
977 // Same as Undo, since Undo undoes the undo, i.e. a redo.
978 ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
979 }
980 }
981
982 bool wxTextCtrl::CanUndo() const
983 {
984 return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
985 }
986
987 bool wxTextCtrl::CanRedo() const
988 {
989 return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
990 }
991
992 // ----------------------------------------------------------------------------
993 // implemenation details
994 // ----------------------------------------------------------------------------
995
996 void wxTextCtrl::Command(wxCommandEvent & event)
997 {
998 SetValue(event.GetString());
999 ProcessCommand (event);
1000 }
1001
1002 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1003 {
1004 // By default, load the first file into the text window.
1005 if (event.GetNumberOfFiles() > 0)
1006 {
1007 LoadFile(event.GetFiles()[0]);
1008 }
1009 }
1010
1011 // ----------------------------------------------------------------------------
1012 // kbd input processing
1013 // ----------------------------------------------------------------------------
1014
1015 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1016 {
1017 MSG *msg = (MSG *)pMsg;
1018
1019 // check for our special keys here: if we don't do it and the parent frame
1020 // uses them as accelerators, they wouldn't work at all, so we disable
1021 // usual preprocessing for them
1022 if ( msg->message == WM_KEYDOWN )
1023 {
1024 WORD vkey = msg->wParam;
1025 if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1026 {
1027 if ( vkey == VK_BACK )
1028 return FALSE;
1029 }
1030 else // no Alt
1031 {
1032 if ( wxIsCtrlDown() )
1033 {
1034 switch ( vkey )
1035 {
1036 case 'C':
1037 case 'V':
1038 case 'X':
1039 case VK_INSERT:
1040 case VK_DELETE:
1041 case VK_HOME:
1042 case VK_END:
1043 return FALSE;
1044 }
1045 }
1046 else if ( wxIsShiftDown() )
1047 {
1048 if ( vkey == VK_INSERT || vkey == VK_DELETE )
1049 return FALSE;
1050 }
1051 }
1052 }
1053
1054 return wxControl::MSWShouldPreProcessMessage(pMsg);
1055 }
1056
1057 void wxTextCtrl::OnChar(wxKeyEvent& event)
1058 {
1059 switch ( event.KeyCode() )
1060 {
1061 case WXK_RETURN:
1062 if ( !(m_windowStyle & wxTE_MULTILINE) )
1063 {
1064 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1065 InitCommandEvent(event);
1066 event.SetString(GetValue());
1067 if ( GetEventHandler()->ProcessEvent(event) )
1068 return;
1069 }
1070 //else: multiline controls need Enter for themselves
1071
1072 break;
1073
1074 case WXK_TAB:
1075 // always produce navigation event - even if we process TAB
1076 // ourselves the fact that we got here means that the user code
1077 // decided to skip processing of this TAB - probably to let it
1078 // do its default job.
1079 {
1080 wxNavigationKeyEvent eventNav;
1081 eventNav.SetDirection(!event.ShiftDown());
1082 eventNav.SetWindowChange(event.ControlDown());
1083 eventNav.SetEventObject(this);
1084
1085 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1086 return;
1087 }
1088 break;
1089 }
1090
1091 // no, we didn't process it
1092 event.Skip();
1093 }
1094
1095 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1096 {
1097 switch (param)
1098 {
1099 case EN_SETFOCUS:
1100 case EN_KILLFOCUS:
1101 {
1102 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1103 : wxEVT_SET_FOCUS,
1104 m_windowId);
1105 event.SetEventObject( this );
1106 GetEventHandler()->ProcessEvent(event);
1107 }
1108 break;
1109
1110 case EN_CHANGE:
1111 {
1112 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
1113 InitCommandEvent(event);
1114 event.SetString(GetValue());
1115 ProcessCommand(event);
1116 }
1117 break;
1118
1119 case EN_MAXTEXT:
1120 // the text size limit has been hit - increase it
1121 if ( !AdjustSpaceLimit() )
1122 {
1123 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1124 InitCommandEvent(event);
1125 event.SetString(GetValue());
1126 ProcessCommand(event);
1127 }
1128 break;
1129
1130 // the other notification messages are not processed
1131 case EN_UPDATE:
1132 case EN_ERRSPACE:
1133 case EN_HSCROLL:
1134 case EN_VSCROLL:
1135 return FALSE;
1136 default:
1137 return FALSE;
1138 }
1139
1140 // processed
1141 return TRUE;
1142 }
1143
1144 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1145 #if wxUSE_CTL3D
1146 WXUINT message,
1147 WXWPARAM wParam,
1148 WXLPARAM lParam
1149 #else
1150 WXUINT WXUNUSED(message),
1151 WXWPARAM WXUNUSED(wParam),
1152 WXLPARAM WXUNUSED(lParam)
1153 #endif
1154 )
1155 {
1156 #if wxUSE_CTL3D
1157 if ( m_useCtl3D )
1158 {
1159 HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1160 return (WXHBRUSH) hbrush;
1161 }
1162 #endif // wxUSE_CTL3D
1163
1164 HDC hdc = (HDC)pDC;
1165 if (GetParent()->GetTransparentBackground())
1166 SetBkMode(hdc, TRANSPARENT);
1167 else
1168 SetBkMode(hdc, OPAQUE);
1169
1170 wxColour colBack = GetBackgroundColour();
1171
1172 if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1173 colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
1174
1175 ::SetBkColor(hdc, wxColourToRGB(colBack));
1176 ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1177
1178 wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1179
1180 return (WXHBRUSH)brush->GetResourceHandle();
1181 }
1182
1183 // In WIN16, need to override normal erasing because
1184 // Ctl3D doesn't use the wxWindows background colour.
1185 #ifdef __WIN16__
1186 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1187 {
1188 wxColour col(m_backgroundColour);
1189
1190 #if wxUSE_CTL3D
1191 if (m_useCtl3D)
1192 col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
1193 #endif
1194
1195 RECT rect;
1196 ::GetClientRect(GetHwnd(), &rect);
1197
1198 COLORREF ref = PALETTERGB(col.Red(),
1199 col.Green(),
1200 col.Blue());
1201 HBRUSH hBrush = ::CreateSolidBrush(ref);
1202 if ( !hBrush )
1203 wxLogLastError(wxT("CreateSolidBrush"));
1204
1205 HDC hdc = (HDC)event.GetDC()->GetHDC();
1206
1207 int mode = ::SetMapMode(hdc, MM_TEXT);
1208
1209 ::FillRect(hdc, &rect, hBrush);
1210 ::DeleteObject(hBrush);
1211 ::SetMapMode(hdc, mode);
1212
1213 }
1214 #endif // Win16
1215
1216 bool wxTextCtrl::AdjustSpaceLimit()
1217 {
1218 #ifndef __WIN16__
1219 unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1220
1221 // HACK: we try to automatically extend the limit for the amount of text
1222 // to allow (interactively) entering more than 64Kb of text under
1223 // Win9x but we shouldn't reset the text limit which was previously
1224 // set explicitly with SetMaxLength()
1225 //
1226 // we could solve this by storing the limit we set in wxTextCtrl but
1227 // to save space we prefer to simply test here the actual limit
1228 // value: we consider that SetMaxLength() can only be called for
1229 // values < 32Kb
1230 if ( limit < 0x8000 )
1231 {
1232 // we've got more text than limit set by SetMaxLength()
1233 return FALSE;
1234 }
1235
1236 unsigned int len = ::GetWindowTextLength(GetHwnd());
1237 if ( len >= limit )
1238 {
1239 limit = len + 0x8000; // 32Kb
1240
1241 #if wxUSE_RICHEDIT
1242 if ( IsRich() )
1243 {
1244 // as a nice side effect, this also allows passing limit > 64Kb
1245 ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1246 }
1247 else
1248 #endif // wxUSE_RICHEDIT
1249 {
1250 if ( limit > 0xffff )
1251 {
1252 // this will set it to a platform-dependent maximum (much more
1253 // than 64Kb under NT)
1254 limit = 0;
1255 }
1256
1257 ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1258 }
1259 }
1260 #endif // !Win16
1261
1262 // we changed the limit
1263 return TRUE;
1264 }
1265
1266 bool wxTextCtrl::AcceptsFocus() const
1267 {
1268 // we don't want focus if we can't be edited
1269 return IsEditable() && wxControl::AcceptsFocus();
1270 }
1271
1272 wxSize wxTextCtrl::DoGetBestSize() const
1273 {
1274 int cx, cy;
1275 wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1276
1277 int wText = DEFAULT_ITEM_WIDTH;
1278
1279 int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1280 if ( m_windowStyle & wxTE_MULTILINE )
1281 {
1282 hText *= wxMax(GetNumberOfLines(), 5);
1283 }
1284 //else: for single line control everything is ok
1285
1286 return wxSize(wText, hText);
1287 }
1288
1289 // ----------------------------------------------------------------------------
1290 // standard handlers for standard edit menu events
1291 // ----------------------------------------------------------------------------
1292
1293 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1294 {
1295 Cut();
1296 }
1297
1298 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1299 {
1300 Copy();
1301 }
1302
1303 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1304 {
1305 Paste();
1306 }
1307
1308 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1309 {
1310 Undo();
1311 }
1312
1313 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1314 {
1315 Redo();
1316 }
1317
1318 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1319 {
1320 event.Enable( CanCut() );
1321 }
1322
1323 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1324 {
1325 event.Enable( CanCopy() );
1326 }
1327
1328 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1329 {
1330 event.Enable( CanPaste() );
1331 }
1332
1333 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1334 {
1335 event.Enable( CanUndo() );
1336 }
1337
1338 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1339 {
1340 event.Enable( CanRedo() );
1341 }
1342
1343 // the rest of the file only deals with the rich edit controls
1344 #if wxUSE_RICHEDIT
1345
1346 // ----------------------------------------------------------------------------
1347 // EN_LINK processing
1348 // ----------------------------------------------------------------------------
1349
1350 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1351 {
1352 NMHDR *hdr = (NMHDR* )lParam;
1353 if ( hdr->code == EN_LINK )
1354 {
1355 ENLINK *enlink = (ENLINK *)hdr;
1356
1357 switch ( enlink->msg )
1358 {
1359 case WM_SETCURSOR:
1360 // ok, so it is hardcoded - do we really nee to customize it?
1361 ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1362 *result = TRUE;
1363 break;
1364
1365 case WM_MOUSEMOVE:
1366 case WM_LBUTTONDOWN:
1367 case WM_LBUTTONUP:
1368 case WM_LBUTTONDBLCLK:
1369 case WM_RBUTTONDOWN:
1370 case WM_RBUTTONUP:
1371 case WM_RBUTTONDBLCLK:
1372 // send a mouse event
1373 {
1374 static const wxEventType eventsMouse[] =
1375 {
1376 wxEVT_MOTION,
1377 wxEVT_LEFT_DOWN,
1378 wxEVT_LEFT_UP,
1379 wxEVT_LEFT_DCLICK,
1380 wxEVT_RIGHT_DOWN,
1381 wxEVT_RIGHT_UP,
1382 wxEVT_RIGHT_DCLICK,
1383 };
1384
1385 // the event ids are consecutive
1386 wxMouseEvent
1387 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1388
1389 InitMouseEvent(evtMouse,
1390 GET_X_LPARAM(enlink->lParam),
1391 GET_Y_LPARAM(enlink->lParam),
1392 enlink->wParam);
1393
1394 wxTextUrlEvent event(m_windowId, evtMouse,
1395 enlink->chrg.cpMin,
1396 enlink->chrg.cpMax);
1397
1398 InitCommandEvent(event);
1399
1400 *result = ProcessCommand(event);
1401 }
1402 break;
1403 }
1404
1405 return TRUE;
1406 }
1407
1408 // not processed
1409 return FALSE;
1410 }
1411
1412 // ----------------------------------------------------------------------------
1413 // colour setting for the rich edit controls
1414 // ----------------------------------------------------------------------------
1415
1416 // Watcom C++ doesn't define this
1417 #ifndef SCF_ALL
1418 #define SCF_ALL 0x0004
1419 #endif
1420
1421 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1422 {
1423 if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1424 {
1425 // colour didn't really change
1426 return FALSE;
1427 }
1428
1429 if ( IsRich() )
1430 {
1431 // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1432 // EM_SETBKGNDCOLOR additionally
1433 ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1434 }
1435
1436 return TRUE;
1437 }
1438
1439 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1440 {
1441 if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1442 {
1443 // colour didn't really change
1444 return FALSE;
1445 }
1446
1447 if ( IsRich() )
1448 {
1449 // change the colour of everything
1450 CHARFORMAT cf;
1451 wxZeroMemory(cf);
1452 cf.cbSize = sizeof(cf);
1453 cf.dwMask = CFM_COLOR;
1454 cf.crTextColor = wxColourToRGB(colour);
1455 ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1456 }
1457
1458 return TRUE;
1459 }
1460
1461 // ----------------------------------------------------------------------------
1462 // styling support for rich edit controls
1463 // ----------------------------------------------------------------------------
1464
1465 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1466 {
1467 if ( !IsRich() )
1468 {
1469 // can't do it with normal text control
1470 return FALSE;
1471 }
1472
1473 // the rich text control doesn't handle setting background colour, so don't
1474 // even try if it's the only thing we want to change
1475 if ( wxRichEditModule::GetLoadedVersion() < 2 &&
1476 !style.HasFont() && !style.HasTextColour() )
1477 {
1478 // nothing to do: return TRUE if there was really nothing to do and
1479 // FALSE if we failed to set bg colour
1480 return !style.HasBackgroundColour();
1481 }
1482
1483 // order the range if needed
1484 if ( start > end )
1485 {
1486 long tmp = start;
1487 start = end;
1488 end = tmp;
1489 }
1490
1491 // we can only change the format of the selection, so select the range we
1492 // want and restore the old selection later
1493 long startOld, endOld;
1494 GetSelection(&startOld, &endOld);
1495
1496 // but do we really have to change the selection?
1497 bool changeSel = start != startOld || end != endOld;
1498
1499 if ( changeSel )
1500 {
1501 DoSetSelection(start, end, FALSE);
1502 }
1503
1504 // initialize CHARFORMAT struct
1505 #if wxUSE_RICHEDIT2
1506 CHARFORMAT2 cf;
1507 #else
1508 CHARFORMAT cf;
1509 #endif
1510 wxZeroMemory(cf);
1511 cf.cbSize = sizeof(cf);
1512
1513 if ( style.HasFont() )
1514 {
1515 // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1516 // but using it doesn't seem to hurt neither so leaving it for now
1517
1518 cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1519 CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1520
1521 // fill in data from LOGFONT but recalculate lfHeight because we need
1522 // the real height in twips and not the negative number which
1523 // wxFillLogFont() returns (this is correct in general and works with
1524 // the Windows font mapper, but not here)
1525 LOGFONT lf;
1526 wxFillLogFont(&lf, &style.GetFont());
1527 cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1528 cf.bCharSet = lf.lfCharSet;
1529 cf.bPitchAndFamily = lf.lfPitchAndFamily;
1530 wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1531
1532 // also deal with underline/italic/bold attributes: note that we must
1533 // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1534 // style to allow clearing it
1535 if ( lf.lfItalic )
1536 {
1537 cf.dwEffects |= CFE_ITALIC;
1538 }
1539
1540 if ( lf.lfWeight == FW_BOLD )
1541 {
1542 cf.dwEffects |= CFE_BOLD;
1543 }
1544
1545 if ( lf.lfUnderline )
1546 {
1547 cf.dwEffects |= CFE_UNDERLINE;
1548 }
1549
1550 // strikeout fonts are not supported by wxWindows
1551 }
1552
1553 if ( style.HasTextColour() )
1554 {
1555 cf.dwMask |= CFM_COLOR;
1556 cf.crTextColor = wxColourToRGB(style.GetTextColour());
1557 }
1558
1559 #if wxUSE_RICHEDIT2
1560 if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
1561 {
1562 cf.dwMask |= CFM_BACKCOLOR;
1563 cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1564 }
1565 #endif // wxUSE_RICHEDIT2
1566
1567 // do format the selection
1568 bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1569 SCF_SELECTION, (LPARAM)&cf) != 0;
1570 if ( !ok )
1571 {
1572 wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1573 }
1574
1575 if ( changeSel )
1576 {
1577 // restore the original selection
1578 DoSetSelection(startOld, endOld, FALSE);
1579 }
1580
1581 return ok;
1582 }
1583
1584 // ----------------------------------------------------------------------------
1585 // wxRichEditModule
1586 // ----------------------------------------------------------------------------
1587
1588 bool wxRichEditModule::OnInit()
1589 {
1590 // don't do anything - we will load it when needed
1591 return TRUE;
1592 }
1593
1594 void wxRichEditModule::OnExit()
1595 {
1596 if ( ms_hRichEdit )
1597 {
1598 FreeLibrary(ms_hRichEdit);
1599 }
1600 }
1601
1602 /* static */
1603 bool wxRichEditModule::Load(int version)
1604 {
1605 wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
1606 _T("incorrect richedit control version requested") );
1607
1608 if ( version <= ms_verRichEdit )
1609 {
1610 // we've already got this or better
1611 return TRUE;
1612 }
1613
1614 if ( ms_hRichEdit )
1615 {
1616 ::FreeLibrary(ms_hRichEdit);
1617 }
1618
1619 // always try load riched20.dll first - like this we won't have to reload
1620 // it later if we're first asked for RE 1 and then for RE 2 or 3
1621 wxString dllname = _T("riched20.dll");
1622 ms_hRichEdit = ::LoadLibrary(dllname);
1623 ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
1624
1625 if ( !ms_hRichEdit && (version == 1) )
1626 {
1627 // fall back to RE 1
1628 dllname = _T("riched32.dll");
1629 ms_hRichEdit = ::LoadLibrary(dllname);
1630 ms_verRichEdit = 1;
1631 }
1632
1633 if ( !ms_hRichEdit )
1634 {
1635 wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
1636
1637 ms_verRichEdit = -1;
1638
1639 return FALSE;
1640 }
1641
1642 return TRUE;
1643 }
1644
1645 #endif // wxUSE_RICHEDIT
1646
1647 #endif // wxUSE_TEXTCTRL
wxWidgets (Impactor)