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1. more corrections to file dnd (works with testdnd GTK sample now as well)
[wxWidgets.git] / samples / dnd / dnd.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: dnd.cpp
3 // Purpose: Drag and drop sample
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 04/01/98
7 // RCS-ID: $Id$
8 // Copyright:
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 #include "wx/wxprec.h"
13
14 #ifdef __BORLANDC__
15 #pragma hdrstop
16 #endif
17
18 #ifndef WX_PRECOMP
19 #include "wx/wx.h"
20 #endif
21
22 #if !wxUSE_DRAG_AND_DROP
23 #error This sample requires drag and drop support in the library
24 #endif
25
26 #include "wx/intl.h"
27 #include "wx/log.h"
28
29 #include "wx/dnd.h"
30 #include "wx/dirdlg.h"
31 #include "wx/filedlg.h"
32 #include "wx/image.h"
33 #include "wx/clipbrd.h"
34 #include "wx/colordlg.h"
35 #include "wx/resource.h"
36
37 #if defined(__WXGTK__) || defined(__WXMOTIF__)
38 #include "mondrian.xpm"
39 #endif
40
41 // ----------------------------------------------------------------------------
42 // Derive two simple classes which just put in the listbox the strings (text or
43 // file names) we drop on them
44 // ----------------------------------------------------------------------------
45
46 class DnDText : public wxTextDropTarget
47 {
48 public:
49 DnDText(wxListBox *pOwner) { m_pOwner = pOwner; }
50
51 virtual bool OnDropText(wxCoord x, wxCoord y, const wxString& text);
52
53 private:
54 wxListBox *m_pOwner;
55 };
56
57 class DnDFile : public wxFileDropTarget
58 {
59 public:
60 DnDFile(wxListBox *pOwner) { m_pOwner = pOwner; }
61
62 virtual bool OnDropFiles(wxCoord x, wxCoord y,
63 const wxArrayString& filenames);
64
65 private:
66 wxListBox *m_pOwner;
67 };
68
69 // ----------------------------------------------------------------------------
70 // Define a new application type
71 // ----------------------------------------------------------------------------
72
73 class DnDApp : public wxApp
74 {
75 public:
76 virtual bool OnInit();
77 };
78
79 IMPLEMENT_APP(DnDApp);
80
81 // ----------------------------------------------------------------------------
82 // Define a new frame type for the main frame
83 // ----------------------------------------------------------------------------
84
85 class DnDFrame : public wxFrame
86 {
87 public:
88 DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h);
89 ~DnDFrame();
90
91 void OnPaint(wxPaintEvent& event);
92 void OnQuit (wxCommandEvent& event);
93 void OnAbout(wxCommandEvent& event);
94 void OnDrag (wxCommandEvent& event);
95 void OnNewFrame(wxCommandEvent& event);
96 void OnHelp (wxCommandEvent& event);
97 void OnLogClear(wxCommandEvent& event);
98
99 void OnCopy(wxCommandEvent& event);
100 void OnPaste(wxCommandEvent& event);
101
102 void OnCopyBitmap(wxCommandEvent& event);
103 void OnPasteBitmap(wxCommandEvent& event);
104
105 void OnCopyFiles(wxCommandEvent& event);
106
107 void OnLeftDown(wxMouseEvent& event);
108 void OnRightDown(wxMouseEvent& event);
109
110 void OnUpdateUIPasteText(wxUpdateUIEvent& event);
111 void OnUpdateUIPasteBitmap(wxUpdateUIEvent& event);
112
113 DECLARE_EVENT_TABLE()
114
115 private:
116 wxListBox *m_ctrlFile,
117 *m_ctrlText;
118 wxTextCtrl *m_ctrlLog;
119
120 wxLog *m_pLog,
121 *m_pLogPrev;
122
123 wxString m_strText;
124 wxBitmap m_bitmap;
125 };
126
127 // ----------------------------------------------------------------------------
128 // A shape is an example of application-specific data which may be transported
129 // via drag-and-drop or clipboard: in our case, we have different geometric
130 // shapes, each one with its own colour and position
131 // ----------------------------------------------------------------------------
132
133 class DnDShape
134 {
135 public:
136 enum Kind
137 {
138 None,
139 Triangle,
140 Rectangle,
141 Ellipse
142 };
143
144 DnDShape(const wxPoint& pos,
145 const wxSize& size,
146 const wxColour& col)
147 : m_pos(pos), m_size(size), m_col(col)
148 {
149 }
150
151 // this is for debugging - lets us see when exactly an object is freed
152 // (this may be later than you think if it's on the clipboard, for example)
153 virtual ~DnDShape() { }
154
155 // the functions used for drag-and-drop: they dump and restore a shape into
156 // some bitwise-copiable data (might use streams too...)
157 // ------------------------------------------------------------------------
158
159 // restore from buffer
160 static DnDShape *New(const void *buf);
161
162 virtual size_t GetDataSize() const
163 {
164 return sizeof(ShapeDump);
165 }
166
167 virtual void GetDataHere(void *buf) const
168 {
169 ShapeDump& dump = *(ShapeDump *)buf;
170 dump.x = m_pos.x;
171 dump.y = m_pos.y;
172 dump.w = m_size.x;
173 dump.h = m_size.y;
174 dump.r = m_col.Red();
175 dump.g = m_col.Green();
176 dump.b = m_col.Blue();
177 dump.k = GetKind();
178 }
179
180 // accessors
181 const wxPoint& GetPosition() const { return m_pos; }
182 const wxColour& GetColour() const { return m_col; }
183 const wxSize& GetSize() const { return m_size; }
184
185 void Move(const wxPoint& pos) { m_pos = pos; }
186
187 // to implement in derived classes
188 virtual Kind GetKind() const = 0;
189
190 virtual void Draw(wxDC& dc)
191 {
192 dc.SetPen(wxPen(m_col, 1, wxSOLID));
193 }
194
195 protected:
196 wxPoint GetCentre() const
197 { return wxPoint(m_pos.x + m_size.x / 2, m_pos.y + m_size.y / 2); }
198
199 struct ShapeDump
200 {
201 int x, y, // position
202 w, h, // size
203 r, g, b, // colour
204 k; // kind
205 };
206
207 wxPoint m_pos;
208 wxSize m_size;
209 wxColour m_col;
210 };
211
212 class DnDTriangularShape : public DnDShape
213 {
214 public:
215 DnDTriangularShape(const wxPoint& pos,
216 const wxSize& size,
217 const wxColour& col)
218 : DnDShape(pos, size, col)
219 {
220 wxLogMessage("DnDTriangularShape is being created");
221 }
222
223 virtual ~DnDTriangularShape()
224 {
225 wxLogMessage("DnDTriangularShape is being deleted");
226 }
227
228 virtual Kind GetKind() const { return Triangle; }
229 virtual void Draw(wxDC& dc)
230 {
231 DnDShape::Draw(dc);
232
233 // well, it's a bit difficult to describe a triangle by position and
234 // size, but we're not doing geometry here, do we? ;-)
235 wxPoint p1(m_pos);
236 wxPoint p2(m_pos.x + m_size.x, m_pos.y);
237 wxPoint p3(m_pos.x, m_pos.y + m_size.y);
238
239 dc.DrawLine(p1, p2);
240 dc.DrawLine(p2, p3);
241 dc.DrawLine(p3, p1);
242
243 #ifdef __WXMSW__
244 dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER);
245 #endif
246 }
247 };
248
249 class DnDRectangularShape : public DnDShape
250 {
251 public:
252 DnDRectangularShape(const wxPoint& pos,
253 const wxSize& size,
254 const wxColour& col)
255 : DnDShape(pos, size, col)
256 {
257 wxLogMessage("DnDRectangularShape is being created");
258 }
259
260 virtual ~DnDRectangularShape()
261 {
262 wxLogMessage("DnDRectangularShape is being deleted");
263 }
264
265 virtual Kind GetKind() const { return Rectangle; }
266 virtual void Draw(wxDC& dc)
267 {
268 DnDShape::Draw(dc);
269
270 wxPoint p1(m_pos);
271 wxPoint p2(p1.x + m_size.x, p1.y);
272 wxPoint p3(p2.x, p2.y + m_size.y);
273 wxPoint p4(p1.x, p3.y);
274
275 dc.DrawLine(p1, p2);
276 dc.DrawLine(p2, p3);
277 dc.DrawLine(p3, p4);
278 dc.DrawLine(p4, p1);
279
280 #ifdef __WXMSW__
281 dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER);
282 #endif
283 }
284 };
285
286 class DnDEllipticShape : public DnDShape
287 {
288 public:
289 DnDEllipticShape(const wxPoint& pos,
290 const wxSize& size,
291 const wxColour& col)
292 : DnDShape(pos, size, col)
293 {
294 wxLogMessage("DnDEllipticShape is being created");
295 }
296
297 virtual ~DnDEllipticShape()
298 {
299 wxLogMessage("DnDEllipticShape is being deleted");
300 }
301
302 virtual Kind GetKind() const { return Ellipse; }
303 virtual void Draw(wxDC& dc)
304 {
305 DnDShape::Draw(dc);
306
307 dc.DrawEllipse(m_pos, m_size);
308
309 #ifdef __WXMSW__
310 dc.FloodFill(GetCentre(), m_col, wxFLOOD_BORDER);
311 #endif
312 }
313 };
314
315 // ----------------------------------------------------------------------------
316 // A wxDataObject specialisation for the application-specific data
317 // ----------------------------------------------------------------------------
318
319 static const char *shapeFormatId = "wxShape";
320
321 class DnDShapeDataObject : public wxDataObject
322 {
323 public:
324 // ctor doesn't copy the pointer, so it shouldn't go away while this object
325 // is alive
326 DnDShapeDataObject(DnDShape *shape = (DnDShape *)NULL)
327 {
328 if ( shape )
329 {
330 // we need to copy the shape because the one we're handled may be
331 // deleted while it's still on the clipboard (for example) - and we
332 // reuse the serialisation methods here to copy it
333 void *buf = malloc(shape->DnDShape::GetDataSize());
334 shape->GetDataHere(buf);
335 m_shape = DnDShape::New(buf);
336
337 free(buf);
338 }
339 else
340 {
341 // nothing to copy
342 m_shape = NULL;
343 }
344
345 // this string should uniquely identify our format, but is otherwise
346 // arbitrary
347 m_formatShape.SetId(shapeFormatId);
348
349 // we don't draw the shape to a bitmap until it's really needed (i.e.
350 // we're asked to do so)
351 m_hasBitmap = FALSE;
352 }
353
354 virtual ~DnDShapeDataObject() { delete m_shape; }
355
356 // after a call to this function, the shape is owned by the caller and it
357 // is responsible for deleting it!
358 //
359 // NB: a better solution would be to make DnDShapes ref counted and this
360 // is what should probably be done in a real life program, otherwise
361 // the ownership problems become too complicated really fast
362 DnDShape *GetShape()
363 {
364 DnDShape *shape = m_shape;
365
366 m_shape = (DnDShape *)NULL;
367 m_hasBitmap = FALSE;
368
369 return shape;
370 }
371
372 // implement base class pure virtuals
373 // ----------------------------------
374
375 virtual wxDataFormat GetPreferredFormat(Direction WXUNUSED(dir)) const
376 {
377 return m_formatShape;
378 }
379
380 virtual size_t GetFormatCount(Direction dir) const
381 {
382 // our custom format is supported by both GetData() and SetData()
383 size_t nFormats = 1;
384 if ( dir == Get )
385 {
386 // but the bitmap format(s) are only supported for output
387 nFormats += m_dataobj.GetFormatCount(dir);
388 }
389
390 return nFormats;
391 }
392
393 virtual void GetAllFormats(wxDataFormat *formats, Direction dir) const
394 {
395 formats[0] = m_formatShape;
396 if ( dir == Get )
397 {
398 m_dataobj.GetAllFormats(&formats[1], dir);
399 }
400 }
401
402 virtual size_t GetDataSize(const wxDataFormat& format) const
403 {
404 if ( format == m_formatShape )
405 {
406 return m_shape->GetDataSize();
407 }
408 else
409 {
410 if ( !m_hasBitmap )
411 CreateBitmap();
412
413 return m_dataobj.GetDataSize();
414 }
415 }
416
417 virtual bool GetDataHere(const wxDataFormat& format, void *pBuf) const
418 {
419 if ( format == m_formatShape )
420 {
421 m_shape->GetDataHere(pBuf);
422
423 return TRUE;
424 }
425 else
426 {
427 if ( !m_hasBitmap )
428 CreateBitmap();
429
430 return m_dataobj.GetDataHere(pBuf);
431 }
432 }
433
434 virtual bool SetData(const wxDataFormat& format,
435 size_t len, const void *buf)
436 {
437 wxCHECK_MSG( format == m_formatShape, FALSE, "unsupported format" );
438
439 delete m_shape;
440 m_shape = DnDShape::New(buf);
441
442 // the shape has changed
443 m_hasBitmap = FALSE;
444
445 return TRUE;
446 }
447
448 private:
449 // creates a bitmap and assigns it to m_dataobj (also sets m_hasBitmap)
450 void CreateBitmap() const;
451
452 wxDataFormat m_formatShape; // our custom format
453
454 wxBitmapDataObject m_dataobj; // it handles bitmaps
455 bool m_hasBitmap; // true if m_dataobj has valid bitmap
456
457 DnDShape *m_shape; // our data
458 };
459
460 // ----------------------------------------------------------------------------
461 // A dialog to edit shape properties
462 // ----------------------------------------------------------------------------
463
464 class DnDShapeDialog : public wxDialog
465 {
466 public:
467 DnDShapeDialog(wxFrame *parent, DnDShape *shape);
468
469 DnDShape *GetShape() const;
470
471 virtual bool TransferDataToWindow();
472 virtual bool TransferDataFromWindow();
473
474 void OnColour(wxCommandEvent& event);
475
476 private:
477 // input
478 DnDShape *m_shape;
479
480 // output
481 DnDShape::Kind m_shapeKind;
482 wxPoint m_pos;
483 wxSize m_size;
484 wxColour m_col;
485
486 // controls
487 wxRadioBox *m_radio;
488 wxTextCtrl *m_textX,
489 *m_textY,
490 *m_textW,
491 *m_textH;
492
493 DECLARE_EVENT_TABLE()
494 };
495
496 // ----------------------------------------------------------------------------
497 // A frame for the shapes which can be drag-and-dropped between frames
498 // ----------------------------------------------------------------------------
499
500 class DnDShapeFrame : public wxFrame
501 {
502 public:
503 DnDShapeFrame(wxFrame *parent);
504 ~DnDShapeFrame();
505
506 void SetShape(DnDShape *shape);
507
508 // callbacks
509 void OnNewShape(wxCommandEvent& event);
510 void OnEditShape(wxCommandEvent& event);
511 void OnClearShape(wxCommandEvent& event);
512
513 void OnCopyShape(wxCommandEvent& event);
514 void OnPasteShape(wxCommandEvent& event);
515
516 void OnUpdateUICopy(wxUpdateUIEvent& event);
517 void OnUpdateUIPaste(wxUpdateUIEvent& event);
518
519 void OnDrag(wxMouseEvent& event);
520 void OnPaint(wxPaintEvent& event);
521 void OnDrop(wxCoord x, wxCoord y, DnDShape *shape);
522
523 private:
524 DnDShape *m_shape;
525
526 static DnDShapeFrame *ms_lastDropTarget;
527
528 DECLARE_EVENT_TABLE()
529 };
530
531 // ----------------------------------------------------------------------------
532 // wxDropTarget derivation for DnDShapes
533 // ----------------------------------------------------------------------------
534
535 class DnDShapeDropTarget : public wxDropTarget
536 {
537 public:
538 DnDShapeDropTarget(DnDShapeFrame *frame)
539 : wxDropTarget(new DnDShapeDataObject)
540 {
541 m_frame = frame;
542 }
543
544 // override base class (pure) virtuals
545 virtual void OnEnter()
546 { m_frame->SetStatusText("Mouse entered the frame"); }
547 virtual void OnLeave()
548 { m_frame->SetStatusText("Mouse left the frame"); }
549 virtual wxDragResult OnData(wxCoord x, wxCoord y, wxDragResult def)
550 {
551 if ( !GetData() )
552 {
553 wxLogError("Failed to get drag and drop data");
554
555 return wxDragNone;
556 }
557
558 m_frame->OnDrop(x, y,
559 ((DnDShapeDataObject *)GetDataObject())->GetShape());
560
561 return def;
562 }
563
564 private:
565 DnDShapeFrame *m_frame;
566 };
567
568 // ----------------------------------------------------------------------------
569 // IDs for the menu commands
570 // ----------------------------------------------------------------------------
571
572 enum
573 {
574 Menu_Quit = 1,
575 Menu_Drag,
576 Menu_NewFrame,
577 Menu_About = 101,
578 Menu_Help,
579 Menu_Clear,
580 Menu_Copy,
581 Menu_Paste,
582 Menu_CopyBitmap,
583 Menu_PasteBitmap,
584 Menu_CopyFiles,
585 Menu_Shape_New = 500,
586 Menu_Shape_Edit,
587 Menu_Shape_Clear,
588 Menu_ShapeClipboard_Copy,
589 Menu_ShapeClipboard_Paste,
590 Button_Colour = 1001
591 };
592
593 BEGIN_EVENT_TABLE(DnDFrame, wxFrame)
594 EVT_MENU(Menu_Quit, DnDFrame::OnQuit)
595 EVT_MENU(Menu_About, DnDFrame::OnAbout)
596 EVT_MENU(Menu_Drag, DnDFrame::OnDrag)
597 EVT_MENU(Menu_NewFrame, DnDFrame::OnNewFrame)
598 EVT_MENU(Menu_Help, DnDFrame::OnHelp)
599 EVT_MENU(Menu_Clear, DnDFrame::OnLogClear)
600 EVT_MENU(Menu_Copy, DnDFrame::OnCopy)
601 EVT_MENU(Menu_Paste, DnDFrame::OnPaste)
602 EVT_MENU(Menu_CopyBitmap, DnDFrame::OnCopyBitmap)
603 EVT_MENU(Menu_PasteBitmap,DnDFrame::OnPasteBitmap)
604 EVT_MENU(Menu_CopyFiles, DnDFrame::OnCopyFiles)
605
606 EVT_UPDATE_UI(Menu_Paste, DnDFrame::OnUpdateUIPasteText)
607 EVT_UPDATE_UI(Menu_PasteBitmap, DnDFrame::OnUpdateUIPasteBitmap)
608
609 EVT_LEFT_DOWN( DnDFrame::OnLeftDown)
610 EVT_RIGHT_DOWN( DnDFrame::OnRightDown)
611 EVT_PAINT( DnDFrame::OnPaint)
612 END_EVENT_TABLE()
613
614 BEGIN_EVENT_TABLE(DnDShapeFrame, wxFrame)
615 EVT_MENU(Menu_Shape_New, DnDShapeFrame::OnNewShape)
616 EVT_MENU(Menu_Shape_Edit, DnDShapeFrame::OnEditShape)
617 EVT_MENU(Menu_Shape_Clear, DnDShapeFrame::OnClearShape)
618
619 EVT_MENU(Menu_ShapeClipboard_Copy, DnDShapeFrame::OnCopyShape)
620 EVT_MENU(Menu_ShapeClipboard_Paste, DnDShapeFrame::OnPasteShape)
621
622 EVT_UPDATE_UI(Menu_ShapeClipboard_Copy, DnDShapeFrame::OnUpdateUICopy)
623 EVT_UPDATE_UI(Menu_ShapeClipboard_Paste, DnDShapeFrame::OnUpdateUIPaste)
624
625 EVT_LEFT_DOWN(DnDShapeFrame::OnDrag)
626
627 EVT_PAINT(DnDShapeFrame::OnPaint)
628 END_EVENT_TABLE()
629
630 BEGIN_EVENT_TABLE(DnDShapeDialog, wxDialog)
631 EVT_BUTTON(Button_Colour, DnDShapeDialog::OnColour)
632 END_EVENT_TABLE()
633
634 // ============================================================================
635 // implementation
636 // ============================================================================
637
638 // `Main program' equivalent, creating windows and returning main app frame
639 bool DnDApp::OnInit()
640 {
641 // load our ressources
642 wxPathList pathList;
643 pathList.Add(".");
644 #ifdef __WXMSW__
645 pathList.Add("./Debug");
646 pathList.Add("./Release");
647 #endif // wxMSW
648
649 wxString path = pathList.FindValidPath("dnd.wxr");
650 if ( !path )
651 {
652 wxLogError("Can't find the resource file dnd.wxr in the current "
653 "directory, aborting.");
654
655 return FALSE;
656 }
657
658 wxDefaultResourceTable->ParseResourceFile(path);
659
660 #if wxUSE_LIBPNG
661 wxImage::AddHandler( new wxPNGHandler );
662 #endif
663
664 // under X we usually want to use the primary selection by default (which
665 // is shared with other apps)
666 wxTheClipboard->UsePrimarySelection();
667
668 // create the main frame window
669 DnDFrame *frame = new DnDFrame((wxFrame *) NULL,
670 "Drag-and-Drop/Clipboard wxWindows Sample",
671 10, 10, 450, 340);
672
673 // activate it
674 frame->Show(TRUE);
675
676 SetTopWindow(frame);
677
678 return TRUE;
679 }
680
681 DnDFrame::DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h)
682 : wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h)),
683 m_strText("wxWindows drag & drop works :-)")
684
685 {
686 // frame icon and status bar
687 SetIcon(wxICON(mondrian));
688
689 CreateStatusBar();
690
691 // construct menu
692 wxMenu *file_menu = new wxMenu;
693 file_menu->Append(Menu_Drag, "&Test drag...");
694 file_menu->AppendSeparator();
695 file_menu->Append(Menu_NewFrame, "&New frame\tCtrl-N");
696 file_menu->AppendSeparator();
697 file_menu->Append(Menu_Quit, "E&xit");
698
699 wxMenu *log_menu = new wxMenu;
700 log_menu->Append(Menu_Clear, "Clear\tCtrl-L");
701
702 wxMenu *help_menu = new wxMenu;
703 help_menu->Append(Menu_Help, "&Help...");
704 help_menu->AppendSeparator();
705 help_menu->Append(Menu_About, "&About");
706
707 wxMenu *clip_menu = new wxMenu;
708 clip_menu->Append(Menu_Copy, "&Copy text\tCtrl+C");
709 clip_menu->Append(Menu_Paste, "&Paste text\tCtrl+V");
710 clip_menu->AppendSeparator();
711 clip_menu->Append(Menu_CopyBitmap, "&Copy bitmap\tAlt+C");
712 clip_menu->Append(Menu_PasteBitmap, "&Paste bitmap\tAlt+V");
713 clip_menu->AppendSeparator();
714 clip_menu->Append(Menu_CopyFiles, "&Copy files\tCtrl+F");
715
716 wxMenuBar *menu_bar = new wxMenuBar;
717 menu_bar->Append(file_menu, "&File");
718 menu_bar->Append(log_menu, "&Log");
719 menu_bar->Append(clip_menu, "&Clipboard");
720 menu_bar->Append(help_menu, "&Help");
721
722 SetMenuBar(menu_bar);
723
724 // make a panel with 3 subwindows
725 wxPoint pos(0, 0);
726 wxSize size(400, 200);
727
728 wxString strFile("Drop files here!"), strText("Drop text on me");
729
730 m_ctrlFile = new wxListBox(this, -1, pos, size, 1, &strFile,
731 wxLB_HSCROLL | wxLB_ALWAYS_SB );
732 m_ctrlText = new wxListBox(this, -1, pos, size, 1, &strText,
733 wxLB_HSCROLL | wxLB_ALWAYS_SB );
734
735 m_ctrlLog = new wxTextCtrl(this, -1, "", pos, size,
736 wxTE_MULTILINE | wxTE_READONLY |
737 wxSUNKEN_BORDER );
738
739 #ifdef __WXMSW__
740 // redirect log messages to the text window and switch on OLE messages
741 // logging
742 wxLog::AddTraceMask(wxTRACE_OleCalls);
743 #endif
744 m_pLog = new wxLogTextCtrl(m_ctrlLog);
745 m_pLogPrev = wxLog::SetActiveTarget(m_pLog);
746
747 // associate drop targets with 2 text controls
748 m_ctrlFile->SetDropTarget(new DnDFile(m_ctrlFile));
749 m_ctrlText->SetDropTarget(new DnDText(m_ctrlText));
750
751 wxLayoutConstraints *c;
752
753 // Top-left listbox
754 c = new wxLayoutConstraints;
755 c->left.SameAs(this, wxLeft);
756 c->top.SameAs(this, wxTop);
757 c->right.PercentOf(this, wxRight, 50);
758 c->height.PercentOf(this, wxHeight, 30);
759 m_ctrlFile->SetConstraints(c);
760
761 // Top-right listbox
762 c = new wxLayoutConstraints;
763 c->left.SameAs (m_ctrlFile, wxRight);
764 c->top.SameAs (this, wxTop);
765 c->right.SameAs (this, wxRight);
766 c->height.PercentOf(this, wxHeight, 30);
767 m_ctrlText->SetConstraints(c);
768
769 // Lower text control
770 c = new wxLayoutConstraints;
771 c->left.SameAs (this, wxLeft);
772 c->right.SameAs (this, wxRight);
773 c->height.PercentOf(this, wxHeight, 50);
774 c->top.SameAs(m_ctrlText, wxBottom);
775 m_ctrlLog->SetConstraints(c);
776
777 SetAutoLayout(TRUE);
778 }
779
780 void DnDFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
781 {
782 Close(TRUE);
783 }
784
785 void DnDFrame::OnPaint(wxPaintEvent& WXUNUSED(event))
786 {
787 int w = 0;
788 int h = 0;
789 GetClientSize( &w, &h );
790
791 wxPaintDC dc(this);
792 dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL, FALSE, "charter" ) );
793 dc.DrawText( "Drag text from here!", 20, h-50 );
794
795 if ( m_bitmap.Ok() )
796 {
797 // 4/5 is 80% taken by other windows, 20 is arbitrary margin
798 dc.DrawBitmap(m_bitmap,
799 w - m_bitmap.GetWidth() - 20,
800 (4*h)/5 + 20);
801 }
802 }
803
804 void DnDFrame::OnUpdateUIPasteText(wxUpdateUIEvent& event)
805 {
806 event.Enable( wxTheClipboard->IsSupported(wxDF_TEXT) );
807 }
808
809 void DnDFrame::OnUpdateUIPasteBitmap(wxUpdateUIEvent& event)
810 {
811 event.Enable( wxTheClipboard->IsSupported(wxDF_BITMAP) );
812 }
813
814 void DnDFrame::OnNewFrame(wxCommandEvent& WXUNUSED(event))
815 {
816 (new DnDShapeFrame(this))->Show(TRUE);
817
818 wxLogStatus(this, "Double click the new frame to select a shape for it");
819 }
820
821 void DnDFrame::OnDrag(wxCommandEvent& WXUNUSED(event))
822 {
823 wxString strText = wxGetTextFromUser
824 (
825 "After you enter text in this dialog, press any mouse\n"
826 "button in the bottom (empty) part of the frame and \n"
827 "drag it anywhere - you will be in fact dragging the\n"
828 "text object containing this text",
829 "Please enter some text", m_strText, this
830 );
831
832 m_strText = strText;
833 }
834
835 void DnDFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
836 {
837 wxMessageBox("Drag-&-Drop Demo\n"
838 "Please see \"Help|Help...\" for details\n"
839 "Copyright (c) 1998 Vadim Zeitlin",
840 "About wxDnD",
841 wxICON_INFORMATION | wxOK,
842 this);
843 }
844
845 void DnDFrame::OnHelp(wxCommandEvent& /* event */)
846 {
847 wxMessageDialog dialog(this,
848 "This small program demonstrates drag & drop support in wxWindows. The program window\n"
849 "consists of 3 parts: the bottom pane is for debug messages, so that you can see what's\n"
850 "going on inside. The top part is split into 2 listboxes, the left one accepts files\n"
851 "and the right one accepts text.\n"
852 "\n"
853 "To test wxDropTarget: open wordpad (write.exe), select some text in it and drag it to\n"
854 "the right listbox (you'll notice the usual visual feedback, i.e. the cursor will change).\n"
855 "Also, try dragging some files (you can select several at once) from Windows Explorer (or \n"
856 "File Manager) to the left pane. Hold down Ctrl/Shift keys when you drop text (doesn't \n"
857 "work with files) and see what changes.\n"
858 "\n"
859 "To test wxDropSource: just press any mouse button on the empty zone of the window and drag\n"
860 "it to wordpad or any other droptarget accepting text (and of course you can just drag it\n"
861 "to the right pane). Due to a lot of trace messages, the cursor might take some time to \n"
862 "change, don't release the mouse button until it does. You can change the string being\n"
863 "dragged in in \"File|Test drag...\" dialog.\n"
864 "\n"
865 "\n"
866 "Please send all questions/bug reports/suggestions &c to \n"
867 "Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>",
868 "wxDnD Help");
869
870 dialog.ShowModal();
871 }
872
873 void DnDFrame::OnLogClear(wxCommandEvent& /* event */ )
874 {
875 m_ctrlLog->Clear();
876 m_ctrlText->Clear();
877 m_ctrlFile->Clear();
878 }
879
880 void DnDFrame::OnLeftDown(wxMouseEvent &WXUNUSED(event) )
881 {
882 if ( !m_strText.IsEmpty() )
883 {
884 // start drag operation
885 wxTextDataObject textData(m_strText);
886 /*
887 wxFileDataObject textData;
888 textData.AddFile( "/file1.txt" );
889 textData.AddFile( "/file2.txt" );
890 */
891 wxDropSource source(textData, this
892 #ifdef __WXMSW__
893 ,wxCURSOR_PENCIL, // for copy
894 wxCURSOR_SPRAYCAN, // for move
895 wxCURSOR_QUESTION_ARROW // for nothing
896 #endif
897 );
898
899 const char *pc;
900
901 switch ( source.DoDragDrop(TRUE) )
902 {
903 case wxDragError: pc = "Error!"; break;
904 case wxDragNone: pc = "Nothing"; break;
905 case wxDragCopy: pc = "Copied"; break;
906 case wxDragMove: pc = "Moved"; break;
907 case wxDragCancel: pc = "Cancelled"; break;
908 default: pc = "Huh?"; break;
909 }
910
911 SetStatusText(wxString("Drag result: ") + pc);
912 }
913 }
914
915 void DnDFrame::OnRightDown(wxMouseEvent &event )
916 {
917 wxMenu menu("Dnd sample menu");
918
919 menu.Append(Menu_Drag, "&Test drag...");
920 menu.AppendSeparator();
921 menu.Append(Menu_About, "&About");
922
923 PopupMenu( &menu, event.GetX(), event.GetY() );
924 }
925
926 DnDFrame::~DnDFrame()
927 {
928 if ( m_pLog != NULL ) {
929 if ( wxLog::SetActiveTarget(m_pLogPrev) == m_pLog )
930 delete m_pLog;
931 }
932 }
933
934 // ---------------------------------------------------------------------------
935 // bitmap clipboard
936 // ---------------------------------------------------------------------------
937
938 void DnDFrame::OnCopyBitmap(wxCommandEvent& WXUNUSED(event))
939 {
940 // PNG support is not always compiled in under Windows, so use BMP there
941 #ifdef __WXMSW__
942 wxFileDialog dialog(this, "Open a BMP file", "", "", "BMP files (*.bmp)|*.bmp", 0);
943 #else
944 wxFileDialog dialog(this, "Open a PNG file", "", "", "PNG files (*.png)|*.png", 0);
945 #endif
946
947 if (dialog.ShowModal() != wxID_OK)
948 {
949 wxLogMessage( _T("Aborted file open") );
950 return;
951 }
952
953 if (dialog.GetPath().IsEmpty())
954 {
955 wxLogMessage( _T("Returned empty string.") );
956 return;
957 }
958
959 if (!wxFileExists(dialog.GetPath()))
960 {
961 wxLogMessage( _T("File doesn't exist.") );
962 return;
963 }
964
965 wxImage image;
966 image.LoadFile( dialog.GetPath(),
967 #ifdef __WXMSW__
968 wxBITMAP_TYPE_BMP
969 #else
970 wxBITMAP_TYPE_PNG
971 #endif
972 );
973 if (!image.Ok())
974 {
975 wxLogError( _T("Invalid image file...") );
976 return;
977 }
978
979 wxLogStatus( _T("Decoding image file...") );
980 wxYield();
981
982 wxBitmap bitmap( image.ConvertToBitmap() );
983
984 if ( !wxTheClipboard->Open() )
985 {
986 wxLogError(_T("Can't open clipboard."));
987
988 return;
989 }
990
991 wxLogMessage( _T("Creating wxBitmapDataObject...") );
992 wxYield();
993
994 if ( !wxTheClipboard->AddData(new wxBitmapDataObject(bitmap)) )
995 {
996 wxLogError(_T("Can't copy image to the clipboard."));
997 }
998 else
999 {
1000 wxLogMessage(_T("Image has been put on the clipboard.") );
1001 wxLogMessage(_T("You can paste it now and look at it.") );
1002 }
1003
1004 wxTheClipboard->Close();
1005 }
1006
1007 void DnDFrame::OnPasteBitmap(wxCommandEvent& WXUNUSED(event))
1008 {
1009 if ( !wxTheClipboard->Open() )
1010 {
1011 wxLogError(_T("Can't open clipboard."));
1012
1013 return;
1014 }
1015
1016 if ( !wxTheClipboard->IsSupported(wxDF_BITMAP) )
1017 {
1018 wxLogWarning(_T("No bitmap on clipboard"));
1019
1020 wxTheClipboard->Close();
1021 return;
1022 }
1023
1024 wxBitmapDataObject data;
1025 if ( !wxTheClipboard->GetData(data) )
1026 {
1027 wxLogError(_T("Can't paste bitmap from the clipboard"));
1028 }
1029 else
1030 {
1031 wxLogMessage(_T("Bitmap pasted from the clipboard") );
1032 m_bitmap = data.GetBitmap();
1033 Refresh();
1034 }
1035
1036 wxTheClipboard->Close();
1037 }
1038
1039 // ----------------------------------------------------------------------------
1040 // file clipboard
1041 // ----------------------------------------------------------------------------
1042
1043 void DnDFrame::OnCopyFiles(wxCommandEvent& WXUNUSED(event))
1044 {
1045 #ifdef __WXMSW__
1046 wxFileDataObject *dobj = new wxFileDataObject;
1047
1048 wxFileDialog dialog(this, "Select a file to copy", "", "",
1049 "All files (*.*)|*.*", 0);
1050
1051 if ( dialog.ShowModal() == wxID_OK )
1052 {
1053 wxString filename = dialog.GetPath();
1054 dobj->AddFile(filename);
1055
1056 wxClipboardLocker locker;
1057 if ( !locker )
1058 {
1059 wxLogError("Can't open clipboard");
1060 }
1061 else
1062 {
1063 if ( !wxTheClipboard->AddData(dobj) )
1064 {
1065 wxLogError("Can't copy file to the clipboard");
1066 }
1067 else
1068 {
1069 wxLogStatus(this, "File '%s' copied to the clipboard",
1070 filename.c_str());
1071 }
1072 }
1073 }
1074 else
1075 {
1076 wxLogStatus(this, "Aborted");
1077 }
1078 #else // !MSW
1079 wxLogError("Sorry, not implemented");
1080 #endif // MSW/!MSW
1081 }
1082
1083 // ---------------------------------------------------------------------------
1084 // text clipboard
1085 // ---------------------------------------------------------------------------
1086
1087 void DnDFrame::OnCopy(wxCommandEvent& WXUNUSED(event))
1088 {
1089 if ( !wxTheClipboard->Open() )
1090 {
1091 wxLogError(_T("Can't open clipboard."));
1092
1093 return;
1094 }
1095
1096 if ( !wxTheClipboard->AddData(new wxTextDataObject(m_strText)) )
1097 {
1098 wxLogError(_T("Can't copy data to the clipboard"));
1099 }
1100 else
1101 {
1102 wxLogMessage(_T("Text '%s' put on the clipboard"), m_strText.c_str());
1103 }
1104
1105 wxTheClipboard->Close();
1106 }
1107
1108 void DnDFrame::OnPaste(wxCommandEvent& WXUNUSED(event))
1109 {
1110 if ( !wxTheClipboard->Open() )
1111 {
1112 wxLogError(_T("Can't open clipboard."));
1113
1114 return;
1115 }
1116
1117 if ( !wxTheClipboard->IsSupported(wxDF_TEXT) )
1118 {
1119 wxLogWarning(_T("No text data on clipboard"));
1120
1121 wxTheClipboard->Close();
1122 return;
1123 }
1124
1125 wxTextDataObject text;
1126 if ( !wxTheClipboard->GetData(text) )
1127 {
1128 wxLogError(_T("Can't paste data from the clipboard"));
1129 }
1130 else
1131 {
1132 wxLogMessage(_T("Text '%s' pasted from the clipboard"),
1133 text.GetText().c_str());
1134 }
1135
1136 wxTheClipboard->Close();
1137 }
1138
1139 // ----------------------------------------------------------------------------
1140 // Notifications called by the base class
1141 // ----------------------------------------------------------------------------
1142
1143 bool DnDText::OnDropText(wxCoord, wxCoord, const wxString& text)
1144 {
1145 m_pOwner->Append(text);
1146
1147 return TRUE;
1148 }
1149
1150 bool DnDFile::OnDropFiles(wxCoord, wxCoord, const wxArrayString& filenames)
1151 {
1152 size_t nFiles = filenames.GetCount();
1153 wxString str;
1154 str.Printf( _T("%d files dropped"), nFiles);
1155 m_pOwner->Append(str);
1156 for ( size_t n = 0; n < nFiles; n++ ) {
1157 m_pOwner->Append(filenames[n]);
1158 }
1159
1160 return TRUE;
1161 }
1162
1163 // ----------------------------------------------------------------------------
1164 // DnDShapeDialog
1165 // ----------------------------------------------------------------------------
1166
1167 DnDShapeDialog::DnDShapeDialog(wxFrame *parent, DnDShape *shape)
1168 {
1169 m_shape = shape;
1170
1171 LoadFromResource(parent, "dialogShape");
1172
1173 m_textX = (wxTextCtrl *)wxFindWindowByName("textX", this);
1174 m_textY = (wxTextCtrl *)wxFindWindowByName("textY", this);
1175 m_textW = (wxTextCtrl *)wxFindWindowByName("textW", this);
1176 m_textH = (wxTextCtrl *)wxFindWindowByName("textH", this);
1177
1178 m_radio = (wxRadioBox *)wxFindWindowByName("radio", this);
1179 }
1180
1181 DnDShape *DnDShapeDialog::GetShape() const
1182 {
1183 switch ( m_shapeKind )
1184 {
1185 default:
1186 case DnDShape::None: return NULL;
1187 case DnDShape::Triangle: return new DnDTriangularShape(m_pos, m_size, m_col);
1188 case DnDShape::Rectangle: return new DnDRectangularShape(m_pos, m_size, m_col);
1189 case DnDShape::Ellipse: return new DnDEllipticShape(m_pos, m_size, m_col);
1190 }
1191 }
1192
1193 bool DnDShapeDialog::TransferDataToWindow()
1194 {
1195
1196 if ( m_shape )
1197 {
1198 m_radio->SetSelection(m_shape->GetKind());
1199 m_pos = m_shape->GetPosition();
1200 m_size = m_shape->GetSize();
1201 m_col = m_shape->GetColour();
1202 }
1203 else
1204 {
1205 m_radio->SetSelection(DnDShape::None);
1206 m_pos = wxPoint(1, 1);
1207 m_size = wxSize(100, 100);
1208 }
1209
1210 m_textX->SetValue(wxString() << m_pos.x);
1211 m_textY->SetValue(wxString() << m_pos.y);
1212 m_textW->SetValue(wxString() << m_size.x);
1213 m_textH->SetValue(wxString() << m_size.y);
1214
1215 return TRUE;
1216 }
1217
1218 bool DnDShapeDialog::TransferDataFromWindow()
1219 {
1220 m_shapeKind = (DnDShape::Kind)m_radio->GetSelection();
1221
1222 m_pos.x = atoi(m_textX->GetValue());
1223 m_pos.y = atoi(m_textY->GetValue());
1224 m_size.x = atoi(m_textW->GetValue());
1225 m_size.y = atoi(m_textH->GetValue());
1226
1227 if ( !m_pos.x || !m_pos.y || !m_size.x || !m_size.y )
1228 {
1229 wxMessageBox("All sizes and positions should be non null!",
1230 "Invalid shape", wxICON_HAND | wxOK, this);
1231
1232 return FALSE;
1233 }
1234
1235 return TRUE;
1236 }
1237
1238 void DnDShapeDialog::OnColour(wxCommandEvent& WXUNUSED(event))
1239 {
1240 wxColourData data;
1241 data.SetChooseFull(TRUE);
1242 for (int i = 0; i < 16; i++)
1243 {
1244 wxColour colour(i*16, i*16, i*16);
1245 data.SetCustomColour(i, colour);
1246 }
1247
1248 wxColourDialog dialog(this, &data);
1249 if ( dialog.ShowModal() == wxID_OK )
1250 {
1251 m_col = dialog.GetColourData().GetColour();
1252 }
1253 }
1254
1255 // ----------------------------------------------------------------------------
1256 // DnDShapeFrame
1257 // ----------------------------------------------------------------------------
1258
1259 DnDShapeFrame *DnDShapeFrame::ms_lastDropTarget = NULL;
1260
1261 DnDShapeFrame::DnDShapeFrame(wxFrame *parent)
1262 : wxFrame(parent, -1, "Shape Frame",
1263 wxDefaultPosition, wxSize(250, 150))
1264 {
1265 CreateStatusBar();
1266
1267 wxMenu *menuShape = new wxMenu;
1268 menuShape->Append(Menu_Shape_New, "&New default shape\tCtrl-S");
1269 menuShape->Append(Menu_Shape_Edit, "&Edit shape\tCtrl-E");
1270 menuShape->AppendSeparator();
1271 menuShape->Append(Menu_Shape_Clear, "&Clear shape\tDel");
1272
1273 wxMenu *menuClipboard = new wxMenu;
1274 menuClipboard->Append(Menu_ShapeClipboard_Copy, "&Copy\tCtrl-C");
1275 menuClipboard->Append(Menu_ShapeClipboard_Paste, "&Paste\tCtrl-V");
1276
1277 wxMenuBar *menubar = new wxMenuBar;
1278 menubar->Append(menuShape, "&Shape");
1279 menubar->Append(menuClipboard, "&Clipboard");
1280
1281 SetMenuBar(menubar);
1282
1283 SetStatusText("Press Ctrl-S to create a new shape");
1284
1285 SetDropTarget(new DnDShapeDropTarget(this));
1286
1287 m_shape = NULL;
1288
1289 SetBackgroundColour(*wxWHITE);
1290 }
1291
1292 DnDShapeFrame::~DnDShapeFrame()
1293 {
1294 if (m_shape)
1295 delete m_shape;
1296 }
1297
1298 void DnDShapeFrame::SetShape(DnDShape *shape)
1299 {
1300 if (m_shape)
1301 delete m_shape;
1302 m_shape = shape;
1303 Refresh();
1304 }
1305
1306 // callbacks
1307 void DnDShapeFrame::OnDrag(wxMouseEvent& event)
1308 {
1309 if ( !m_shape )
1310 {
1311 event.Skip();
1312
1313 return;
1314 }
1315
1316 // start drag operation
1317 DnDShapeDataObject shapeData(m_shape);
1318 wxDropSource source(shapeData, this);
1319
1320 const char *pc = NULL;
1321 switch ( source.DoDragDrop(TRUE) )
1322 {
1323 default:
1324 case wxDragError:
1325 wxLogError("An error occured during drag and drop operation");
1326 break;
1327
1328 case wxDragNone:
1329 SetStatusText("Nothing happened");
1330 break;
1331
1332 case wxDragCopy:
1333 pc = "copied";
1334 break;
1335
1336 case wxDragMove:
1337 pc = "moved";
1338 if ( ms_lastDropTarget != this )
1339 {
1340 // don't delete the shape if we dropped it on ourselves!
1341 SetShape(NULL);
1342 }
1343 break;
1344
1345 case wxDragCancel:
1346 SetStatusText("Drag and drop operation cancelled");
1347 break;
1348 }
1349
1350 if ( pc )
1351 {
1352 SetStatusText(wxString("Shape successfully ") + pc);
1353 }
1354 //else: status text already set
1355 }
1356
1357 void DnDShapeFrame::OnDrop(wxCoord x, wxCoord y, DnDShape *shape)
1358 {
1359 ms_lastDropTarget = this;
1360
1361 wxPoint pt(x, y);
1362
1363 wxString s;
1364 s.Printf("Shape dropped at (%ld, %ld)", pt.x, pt.y);
1365 SetStatusText(s);
1366
1367 shape->Move(pt);
1368 SetShape(shape);
1369 }
1370
1371 void DnDShapeFrame::OnEditShape(wxCommandEvent& event)
1372 {
1373 DnDShapeDialog dlg(this, m_shape);
1374 if ( dlg.ShowModal() == wxID_OK )
1375 {
1376 SetShape(dlg.GetShape());
1377
1378 if ( m_shape )
1379 {
1380 SetStatusText("You can now drag the shape to another frame");
1381 }
1382 }
1383 }
1384
1385 void DnDShapeFrame::OnNewShape(wxCommandEvent& event)
1386 {
1387 SetShape(new DnDEllipticShape(wxPoint(10, 10), wxSize(80, 60), *wxRED));
1388
1389 SetStatusText("You can now drag the shape to another frame");
1390 }
1391
1392 void DnDShapeFrame::OnClearShape(wxCommandEvent& event)
1393 {
1394 SetShape(NULL);
1395 }
1396
1397 void DnDShapeFrame::OnCopyShape(wxCommandEvent& event)
1398 {
1399 if ( m_shape )
1400 {
1401 wxClipboardLocker clipLocker;
1402 if ( !clipLocker )
1403 {
1404 wxLogError("Can't open the clipboard");
1405
1406 return;
1407 }
1408
1409 wxTheClipboard->AddData(new DnDShapeDataObject(m_shape));
1410 }
1411 }
1412
1413 void DnDShapeFrame::OnPasteShape(wxCommandEvent& event)
1414 {
1415 wxClipboardLocker clipLocker;
1416 if ( !clipLocker )
1417 {
1418 wxLogError("Can't open the clipboard");
1419
1420 return;
1421 }
1422
1423 DnDShapeDataObject shapeDataObject(NULL);
1424 if ( wxTheClipboard->GetData(shapeDataObject) )
1425 {
1426 SetShape(shapeDataObject.GetShape());
1427 }
1428 else
1429 {
1430 wxLogStatus("No shape on the clipboard");
1431 }
1432 }
1433
1434 void DnDShapeFrame::OnUpdateUICopy(wxUpdateUIEvent& event)
1435 {
1436 event.Enable( m_shape != NULL );
1437 }
1438
1439 void DnDShapeFrame::OnUpdateUIPaste(wxUpdateUIEvent& event)
1440 {
1441 event.Enable( wxTheClipboard->IsSupported(wxDataFormat(shapeFormatId)) );
1442 }
1443
1444 void DnDShapeFrame::OnPaint(wxPaintEvent& event)
1445 {
1446 if ( m_shape )
1447 {
1448 wxPaintDC dc(this);
1449
1450 m_shape->Draw(dc);
1451 }
1452 else
1453 {
1454 event.Skip();
1455 }
1456 }
1457
1458 // ----------------------------------------------------------------------------
1459 // DnDShape
1460 // ----------------------------------------------------------------------------
1461
1462 DnDShape *DnDShape::New(const void *buf)
1463 {
1464 const ShapeDump& dump = *(const ShapeDump *)buf;
1465 switch ( dump.k )
1466 {
1467 case Triangle:
1468 return new DnDTriangularShape(wxPoint(dump.x, dump.y),
1469 wxSize(dump.w, dump.h),
1470 wxColour(dump.r, dump.g, dump.b));
1471
1472 case Rectangle:
1473 return new DnDRectangularShape(wxPoint(dump.x, dump.y),
1474 wxSize(dump.w, dump.h),
1475 wxColour(dump.r, dump.g, dump.b));
1476
1477 case Ellipse:
1478 return new DnDEllipticShape(wxPoint(dump.x, dump.y),
1479 wxSize(dump.w, dump.h),
1480 wxColour(dump.r, dump.g, dump.b));
1481
1482 default:
1483 wxFAIL_MSG("invalid shape!");
1484 return NULL;
1485 }
1486 }
1487
1488 // ----------------------------------------------------------------------------
1489 // DnDShapeDataObject
1490 // ----------------------------------------------------------------------------
1491
1492 void DnDShapeDataObject::CreateBitmap() const
1493 {
1494 wxPoint pos = m_shape->GetPosition();
1495 wxSize size = m_shape->GetSize();
1496 int x = pos.x + size.x,
1497 y = pos.y + size.y;
1498 wxBitmap bitmap(x, y);
1499 wxMemoryDC dc;
1500 dc.SelectObject(bitmap);
1501 dc.SetBrush(wxBrush("white", wxSOLID));
1502 dc.Clear();
1503 m_shape->Draw(dc);
1504 dc.SelectObject(wxNullBitmap);
1505
1506 DnDShapeDataObject *self = (DnDShapeDataObject *)this; // const_cast
1507 self->m_dataobj.SetBitmap(bitmap);
1508 self->m_hasBitmap = TRUE;
1509 }
1510
wxWidgets (Impactor)