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small corrections for dnd code and added wxFileDataObject demo to the sample
[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 // create the main frame window
665 DnDFrame *frame = new DnDFrame((wxFrame *) NULL,
666 "Drag-and-Drop/Clipboard wxWindows Sample",
667 50, 50, 450, 340);
668
669 // activate it
670 frame->Show(TRUE);
671
672 SetTopWindow(frame);
673
674 return TRUE;
675 }
676
677 DnDFrame::DnDFrame(wxFrame *frame, char *title, int x, int y, int w, int h)
678 : wxFrame(frame, -1, title, wxPoint(x, y), wxSize(w, h)),
679 m_strText("wxWindows drag & drop works :-)")
680
681 {
682 // frame icon and status bar
683 SetIcon(wxICON(mondrian));
684
685 CreateStatusBar();
686
687 // construct menu
688 wxMenu *file_menu = new wxMenu;
689 file_menu->Append(Menu_Drag, "&Test drag...");
690 file_menu->AppendSeparator();
691 file_menu->Append(Menu_NewFrame, "&New frame\tCtrl-N");
692 file_menu->AppendSeparator();
693 file_menu->Append(Menu_Quit, "E&xit");
694
695 wxMenu *log_menu = new wxMenu;
696 log_menu->Append(Menu_Clear, "Clear\tDel");
697
698 wxMenu *help_menu = new wxMenu;
699 help_menu->Append(Menu_Help, "&Help...");
700 help_menu->AppendSeparator();
701 help_menu->Append(Menu_About, "&About");
702
703 wxMenu *clip_menu = new wxMenu;
704 clip_menu->Append(Menu_Copy, "&Copy text\tCtrl+C");
705 clip_menu->Append(Menu_Paste, "&Paste text\tCtrl+V");
706 clip_menu->AppendSeparator();
707 clip_menu->Append(Menu_CopyBitmap, "&Copy bitmap\tAlt+C");
708 clip_menu->Append(Menu_PasteBitmap, "&Paste bitmap\tAlt+V");
709 clip_menu->AppendSeparator();
710 clip_menu->Append(Menu_CopyFiles, "&Copy files\tCtrl+F");
711
712 wxMenuBar *menu_bar = new wxMenuBar;
713 menu_bar->Append(file_menu, "&File");
714 menu_bar->Append(log_menu, "&Log");
715 menu_bar->Append(clip_menu, "&Clipboard");
716 menu_bar->Append(help_menu, "&Help");
717
718 SetMenuBar(menu_bar);
719
720 // make a panel with 3 subwindows
721 wxPoint pos(0, 0);
722 wxSize size(400, 200);
723
724 wxString strFile("Drop files here!"), strText("Drop text on me");
725
726 m_ctrlFile = new wxListBox(this, -1, pos, size, 1, &strFile,
727 wxLB_HSCROLL | wxLB_ALWAYS_SB );
728 m_ctrlText = new wxListBox(this, -1, pos, size, 1, &strText,
729 wxLB_HSCROLL | wxLB_ALWAYS_SB );
730
731 m_ctrlLog = new wxTextCtrl(this, -1, "", pos, size,
732 wxTE_MULTILINE | wxTE_READONLY |
733 wxSUNKEN_BORDER );
734
735 #ifdef __WXMSW__
736 // redirect log messages to the text window and switch on OLE messages
737 // logging
738 wxLog::AddTraceMask(wxTRACE_OleCalls);
739 #endif
740 m_pLog = new wxLogTextCtrl(m_ctrlLog);
741 m_pLogPrev = wxLog::SetActiveTarget(m_pLog);
742
743 // associate drop targets with 2 text controls
744 m_ctrlFile->SetDropTarget(new DnDFile(m_ctrlFile));
745 m_ctrlText->SetDropTarget(new DnDText(m_ctrlText));
746
747 wxLayoutConstraints *c;
748
749 // Top-left listbox
750 c = new wxLayoutConstraints;
751 c->left.SameAs(this, wxLeft);
752 c->top.SameAs(this, wxTop);
753 c->right.PercentOf(this, wxRight, 50);
754 c->height.PercentOf(this, wxHeight, 30);
755 m_ctrlFile->SetConstraints(c);
756
757 // Top-right listbox
758 c = new wxLayoutConstraints;
759 c->left.SameAs (m_ctrlFile, wxRight);
760 c->top.SameAs (this, wxTop);
761 c->right.SameAs (this, wxRight);
762 c->height.PercentOf(this, wxHeight, 30);
763 m_ctrlText->SetConstraints(c);
764
765 // Lower text control
766 c = new wxLayoutConstraints;
767 c->left.SameAs (this, wxLeft);
768 c->right.SameAs (this, wxRight);
769 c->height.PercentOf(this, wxHeight, 50);
770 c->top.SameAs(m_ctrlText, wxBottom);
771 m_ctrlLog->SetConstraints(c);
772
773 SetAutoLayout(TRUE);
774 }
775
776 void DnDFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
777 {
778 Close(TRUE);
779 }
780
781 void DnDFrame::OnPaint(wxPaintEvent& WXUNUSED(event))
782 {
783 int w = 0;
784 int h = 0;
785 GetClientSize( &w, &h );
786
787 wxPaintDC dc(this);
788 dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL, FALSE, "charter" ) );
789 dc.DrawText( "Drag text from here!", 20, h-50 );
790
791 if ( m_bitmap.Ok() )
792 {
793 // 4/5 is 80% taken by other windows, 20 is arbitrary margin
794 dc.DrawBitmap(m_bitmap,
795 w - m_bitmap.GetWidth() - 20,
796 (4*h)/5 + 20);
797 }
798 }
799
800 void DnDFrame::OnUpdateUIPasteText(wxUpdateUIEvent& event)
801 {
802 event.Enable( wxTheClipboard->IsSupported(wxDF_TEXT) );
803 }
804
805 void DnDFrame::OnUpdateUIPasteBitmap(wxUpdateUIEvent& event)
806 {
807 event.Enable( wxTheClipboard->IsSupported(wxDF_BITMAP) );
808 }
809
810 void DnDFrame::OnNewFrame(wxCommandEvent& WXUNUSED(event))
811 {
812 (new DnDShapeFrame(this))->Show(TRUE);
813
814 wxLogStatus(this, "Double click the new frame to select a shape for it");
815 }
816
817 void DnDFrame::OnDrag(wxCommandEvent& WXUNUSED(event))
818 {
819 wxString strText = wxGetTextFromUser
820 (
821 "After you enter text in this dialog, press any mouse\n"
822 "button in the bottom (empty) part of the frame and \n"
823 "drag it anywhere - you will be in fact dragging the\n"
824 "text object containing this text",
825 "Please enter some text", m_strText, this
826 );
827
828 m_strText = strText;
829 }
830
831 void DnDFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
832 {
833 wxMessageBox("Drag-&-Drop Demo\n"
834 "Please see \"Help|Help...\" for details\n"
835 "Copyright (c) 1998 Vadim Zeitlin",
836 "About wxDnD",
837 wxICON_INFORMATION | wxOK,
838 this);
839 }
840
841 void DnDFrame::OnHelp(wxCommandEvent& /* event */)
842 {
843 wxMessageDialog dialog(this,
844 "This small program demonstrates drag & drop support in wxWindows. The program window\n"
845 "consists of 3 parts: the bottom pane is for debug messages, so that you can see what's\n"
846 "going on inside. The top part is split into 2 listboxes, the left one accepts files\n"
847 "and the right one accepts text.\n"
848 "\n"
849 "To test wxDropTarget: open wordpad (write.exe), select some text in it and drag it to\n"
850 "the right listbox (you'll notice the usual visual feedback, i.e. the cursor will change).\n"
851 "Also, try dragging some files (you can select several at once) from Windows Explorer (or \n"
852 "File Manager) to the left pane. Hold down Ctrl/Shift keys when you drop text (doesn't \n"
853 "work with files) and see what changes.\n"
854 "\n"
855 "To test wxDropSource: just press any mouse button on the empty zone of the window and drag\n"
856 "it to wordpad or any other droptarget accepting text (and of course you can just drag it\n"
857 "to the right pane). Due to a lot of trace messages, the cursor might take some time to \n"
858 "change, don't release the mouse button until it does. You can change the string being\n"
859 "dragged in in \"File|Test drag...\" dialog.\n"
860 "\n"
861 "\n"
862 "Please send all questions/bug reports/suggestions &c to \n"
863 "Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>",
864 "wxDnD Help");
865
866 dialog.ShowModal();
867 }
868
869 void DnDFrame::OnLogClear(wxCommandEvent& /* event */ )
870 {
871 m_ctrlLog->Clear();
872 }
873
874 void DnDFrame::OnLeftDown(wxMouseEvent &WXUNUSED(event) )
875 {
876 if ( !m_strText.IsEmpty() )
877 {
878 // start drag operation
879 wxTextDataObject textData(m_strText);
880 wxDropSource source(textData, this
881 #ifdef __WXMSW__
882 ,wxCURSOR_PENCIL, // for copy
883 wxCURSOR_SPRAYCAN, // for move
884 wxCURSOR_QUESTION_ARROW // for nothing
885 #endif
886 );
887
888 const char *pc;
889
890 switch ( source.DoDragDrop(TRUE) )
891 {
892 case wxDragError: pc = "Error!"; break;
893 case wxDragNone: pc = "Nothing"; break;
894 case wxDragCopy: pc = "Copied"; break;
895 case wxDragMove: pc = "Moved"; break;
896 case wxDragCancel: pc = "Cancelled"; break;
897 default: pc = "Huh?"; break;
898 }
899
900 SetStatusText(wxString("Drag result: ") + pc);
901 }
902 }
903
904 void DnDFrame::OnRightDown(wxMouseEvent &event )
905 {
906 wxMenu menu("Dnd sample menu");
907
908 menu.Append(Menu_Drag, "&Test drag...");
909 menu.AppendSeparator();
910 menu.Append(Menu_About, "&About");
911
912 PopupMenu( &menu, event.GetX(), event.GetY() );
913 }
914
915 DnDFrame::~DnDFrame()
916 {
917 if ( m_pLog != NULL ) {
918 if ( wxLog::SetActiveTarget(m_pLogPrev) == m_pLog )
919 delete m_pLog;
920 }
921 }
922
923 // ---------------------------------------------------------------------------
924 // bitmap clipboard
925 // ---------------------------------------------------------------------------
926
927 void DnDFrame::OnCopyBitmap(wxCommandEvent& WXUNUSED(event))
928 {
929 // PNG support is not always compiled in under Windows, so use BMP there
930 #ifdef __WXMSW__
931 wxFileDialog dialog(this, "Open a BMP file", "", "", "BMP files (*.bmp)|*.bmp", 0);
932 #else
933 wxFileDialog dialog(this, "Open a PNG file", "", "", "PNG files (*.png)|*.png", 0);
934 #endif
935
936 if (dialog.ShowModal() != wxID_OK)
937 {
938 wxLogMessage( _T("Aborted file open") );
939 return;
940 }
941
942 if (dialog.GetPath().IsEmpty())
943 {
944 wxLogMessage( _T("Returned empty string.") );
945 return;
946 }
947
948 if (!wxFileExists(dialog.GetPath()))
949 {
950 wxLogMessage( _T("File doesn't exist.") );
951 return;
952 }
953
954 wxImage image;
955 image.LoadFile( dialog.GetPath(),
956 #ifdef __WXMSW__
957 wxBITMAP_TYPE_BMP
958 #else
959 wxBITMAP_TYPE_PNG
960 #endif
961 );
962 if (!image.Ok())
963 {
964 wxLogError( _T("Invalid image file...") );
965 return;
966 }
967
968 wxLogStatus( _T("Decoding image file...") );
969 wxYield();
970
971 wxBitmap bitmap( image.ConvertToBitmap() );
972
973 if ( !wxTheClipboard->Open() )
974 {
975 wxLogError(_T("Can't open clipboard."));
976
977 return;
978 }
979
980 wxLogMessage( _T("Creating wxBitmapDataObject...") );
981 wxYield();
982
983 if ( !wxTheClipboard->AddData(new wxBitmapDataObject(bitmap)) )
984 {
985 wxLogError(_T("Can't copy image to the clipboard."));
986 }
987 else
988 {
989 wxLogMessage(_T("Image has been put on the clipboard.") );
990 wxLogMessage(_T("You can paste it now and look at it.") );
991 }
992
993 wxTheClipboard->Close();
994 }
995
996 void DnDFrame::OnPasteBitmap(wxCommandEvent& WXUNUSED(event))
997 {
998 if ( !wxTheClipboard->Open() )
999 {
1000 wxLogError(_T("Can't open clipboard."));
1001
1002 return;
1003 }
1004
1005 if ( !wxTheClipboard->IsSupported(wxDF_BITMAP) )
1006 {
1007 wxLogWarning(_T("No bitmap on clipboard"));
1008
1009 wxTheClipboard->Close();
1010 return;
1011 }
1012
1013 wxBitmapDataObject data;
1014 if ( !wxTheClipboard->GetData(data) )
1015 {
1016 wxLogError(_T("Can't paste bitmap from the clipboard"));
1017 }
1018 else
1019 {
1020 wxLogMessage(_T("Bitmap pasted from the clipboard") );
1021 m_bitmap = data.GetBitmap();
1022 Refresh();
1023 }
1024
1025 wxTheClipboard->Close();
1026 }
1027
1028 // ----------------------------------------------------------------------------
1029 // file clipboard
1030 // ----------------------------------------------------------------------------
1031
1032 void DnDFrame::OnCopyFiles(wxCommandEvent& WXUNUSED(event))
1033 {
1034 #ifdef __WXMSW__
1035 wxFileDataObject *dobj = new wxFileDataObject;
1036
1037 wxFileDialog dialog(this, "Select a file to copy", "", "",
1038 "All files (*.*)|*.*", 0);
1039
1040 if ( dialog.ShowModal() == wxID_OK )
1041 {
1042 wxString filename = dialog.GetPath();
1043 dobj->AddFile(filename);
1044
1045 wxClipboardLocker locker;
1046 if ( !locker )
1047 {
1048 wxLogError("Can't open clipboard");
1049 }
1050 else
1051 {
1052 if ( !wxTheClipboard->AddData(dobj) )
1053 {
1054 wxLogError("Can't copy file to the clipboard");
1055 }
1056 else
1057 {
1058 wxLogStatus(this, "File '%s' copied to the clipboard",
1059 filename.c_str());
1060 }
1061 }
1062 }
1063 else
1064 {
1065 wxLogStatus(this, "Aborted");
1066 }
1067 #else // !MSW
1068 wxLogError("Sorry, not implemented");
1069 #endif // MSW/!MSW
1070 }
1071
1072 // ---------------------------------------------------------------------------
1073 // text clipboard
1074 // ---------------------------------------------------------------------------
1075
1076 void DnDFrame::OnCopy(wxCommandEvent& WXUNUSED(event))
1077 {
1078 if ( !wxTheClipboard->Open() )
1079 {
1080 wxLogError(_T("Can't open clipboard."));
1081
1082 return;
1083 }
1084
1085 if ( !wxTheClipboard->AddData(new wxTextDataObject(m_strText)) )
1086 {
1087 wxLogError(_T("Can't copy data to the clipboard"));
1088 }
1089 else
1090 {
1091 wxLogMessage(_T("Text '%s' put on the clipboard"), m_strText.c_str());
1092 }
1093
1094 wxTheClipboard->Close();
1095 }
1096
1097 void DnDFrame::OnPaste(wxCommandEvent& WXUNUSED(event))
1098 {
1099 if ( !wxTheClipboard->Open() )
1100 {
1101 wxLogError(_T("Can't open clipboard."));
1102
1103 return;
1104 }
1105
1106 if ( !wxTheClipboard->IsSupported(wxDF_TEXT) )
1107 {
1108 wxLogWarning(_T("No text data on clipboard"));
1109
1110 wxTheClipboard->Close();
1111 return;
1112 }
1113
1114 wxTextDataObject text;
1115 if ( !wxTheClipboard->GetData(text) )
1116 {
1117 wxLogError(_T("Can't paste data from the clipboard"));
1118 }
1119 else
1120 {
1121 wxLogMessage(_T("Text '%s' pasted from the clipboard"),
1122 text.GetText().c_str());
1123 }
1124
1125 wxTheClipboard->Close();
1126 }
1127
1128 // ----------------------------------------------------------------------------
1129 // Notifications called by the base class
1130 // ----------------------------------------------------------------------------
1131
1132 bool DnDText::OnDropText(wxCoord, wxCoord, const wxString& text)
1133 {
1134 m_pOwner->Append(text);
1135
1136 return TRUE;
1137 }
1138
1139 bool DnDFile::OnDropFiles(wxCoord, wxCoord, const wxArrayString& filenames)
1140 {
1141 size_t nFiles = filenames.GetCount();
1142 wxString str;
1143 str.Printf( _T("%d files dropped"), nFiles);
1144 m_pOwner->Append(str);
1145 for ( size_t n = 0; n < nFiles; n++ ) {
1146 m_pOwner->Append(filenames[n]);
1147 }
1148
1149 return TRUE;
1150 }
1151
1152 // ----------------------------------------------------------------------------
1153 // DnDShapeDialog
1154 // ----------------------------------------------------------------------------
1155
1156 DnDShapeDialog::DnDShapeDialog(wxFrame *parent, DnDShape *shape)
1157 {
1158 m_shape = shape;
1159
1160 LoadFromResource(parent, "dialogShape");
1161
1162 m_textX = (wxTextCtrl *)wxFindWindowByName("textX", this);
1163 m_textY = (wxTextCtrl *)wxFindWindowByName("textY", this);
1164 m_textW = (wxTextCtrl *)wxFindWindowByName("textW", this);
1165 m_textH = (wxTextCtrl *)wxFindWindowByName("textH", this);
1166
1167 m_radio = (wxRadioBox *)wxFindWindowByName("radio", this);
1168 }
1169
1170 DnDShape *DnDShapeDialog::GetShape() const
1171 {
1172 switch ( m_shapeKind )
1173 {
1174 default:
1175 case DnDShape::None: return NULL;
1176 case DnDShape::Triangle: return new DnDTriangularShape(m_pos, m_size, m_col);
1177 case DnDShape::Rectangle: return new DnDRectangularShape(m_pos, m_size, m_col);
1178 case DnDShape::Ellipse: return new DnDEllipticShape(m_pos, m_size, m_col);
1179 }
1180 }
1181
1182 bool DnDShapeDialog::TransferDataToWindow()
1183 {
1184
1185 if ( m_shape )
1186 {
1187 m_radio->SetSelection(m_shape->GetKind());
1188 m_pos = m_shape->GetPosition();
1189 m_size = m_shape->GetSize();
1190 m_col = m_shape->GetColour();
1191 }
1192 else
1193 {
1194 m_radio->SetSelection(DnDShape::None);
1195 m_pos = wxPoint(1, 1);
1196 m_size = wxSize(100, 100);
1197 }
1198
1199 m_textX->SetValue(wxString() << m_pos.x);
1200 m_textY->SetValue(wxString() << m_pos.y);
1201 m_textW->SetValue(wxString() << m_size.x);
1202 m_textH->SetValue(wxString() << m_size.y);
1203
1204 return TRUE;
1205 }
1206
1207 bool DnDShapeDialog::TransferDataFromWindow()
1208 {
1209 m_shapeKind = (DnDShape::Kind)m_radio->GetSelection();
1210
1211 m_pos.x = atoi(m_textX->GetValue());
1212 m_pos.y = atoi(m_textY->GetValue());
1213 m_size.x = atoi(m_textW->GetValue());
1214 m_size.y = atoi(m_textH->GetValue());
1215
1216 if ( !m_pos.x || !m_pos.y || !m_size.x || !m_size.y )
1217 {
1218 wxMessageBox("All sizes and positions should be non null!",
1219 "Invalid shape", wxICON_HAND | wxOK, this);
1220
1221 return FALSE;
1222 }
1223
1224 return TRUE;
1225 }
1226
1227 void DnDShapeDialog::OnColour(wxCommandEvent& WXUNUSED(event))
1228 {
1229 wxColourData data;
1230 data.SetChooseFull(TRUE);
1231 for (int i = 0; i < 16; i++)
1232 {
1233 wxColour colour(i*16, i*16, i*16);
1234 data.SetCustomColour(i, colour);
1235 }
1236
1237 wxColourDialog dialog(this, &data);
1238 if ( dialog.ShowModal() == wxID_OK )
1239 {
1240 m_col = dialog.GetColourData().GetColour();
1241 }
1242 }
1243
1244 // ----------------------------------------------------------------------------
1245 // DnDShapeFrame
1246 // ----------------------------------------------------------------------------
1247
1248 DnDShapeFrame *DnDShapeFrame::ms_lastDropTarget = NULL;
1249
1250 DnDShapeFrame::DnDShapeFrame(wxFrame *parent)
1251 : wxFrame(parent, -1, "Shape Frame",
1252 wxDefaultPosition, wxSize(250, 150))
1253 {
1254 CreateStatusBar();
1255
1256 wxMenu *menuShape = new wxMenu;
1257 menuShape->Append(Menu_Shape_New, "&New default shape\tCtrl-S");
1258 menuShape->Append(Menu_Shape_Edit, "&Edit shape\tCtrl-E");
1259 menuShape->AppendSeparator();
1260 menuShape->Append(Menu_Shape_Clear, "&Clear shape\tDel");
1261
1262 wxMenu *menuClipboard = new wxMenu;
1263 menuClipboard->Append(Menu_ShapeClipboard_Copy, "&Copy\tCtrl-C");
1264 menuClipboard->Append(Menu_ShapeClipboard_Paste, "&Paste\tCtrl-V");
1265
1266 wxMenuBar *menubar = new wxMenuBar;
1267 menubar->Append(menuShape, "&Shape");
1268 menubar->Append(menuClipboard, "&Clipboard");
1269
1270 SetMenuBar(menubar);
1271
1272 SetStatusText("Press Ctrl-S to create a new shape");
1273
1274 SetDropTarget(new DnDShapeDropTarget(this));
1275
1276 m_shape = NULL;
1277
1278 SetBackgroundColour(*wxWHITE);
1279 }
1280
1281 DnDShapeFrame::~DnDShapeFrame()
1282 {
1283 if (m_shape)
1284 delete m_shape;
1285 }
1286
1287 void DnDShapeFrame::SetShape(DnDShape *shape)
1288 {
1289 if (m_shape)
1290 delete m_shape;
1291 m_shape = shape;
1292 Refresh();
1293 }
1294
1295 // callbacks
1296 void DnDShapeFrame::OnDrag(wxMouseEvent& event)
1297 {
1298 if ( !m_shape )
1299 {
1300 event.Skip();
1301
1302 return;
1303 }
1304
1305 // start drag operation
1306 DnDShapeDataObject shapeData(m_shape);
1307 wxDropSource source(shapeData, this);
1308
1309 const char *pc = NULL;
1310 switch ( source.DoDragDrop(TRUE) )
1311 {
1312 default:
1313 case wxDragError:
1314 wxLogError("An error occured during drag and drop operation");
1315 break;
1316
1317 case wxDragNone:
1318 SetStatusText("Nothing happened");
1319 break;
1320
1321 case wxDragCopy:
1322 pc = "copied";
1323 break;
1324
1325 case wxDragMove:
1326 pc = "moved";
1327 if ( ms_lastDropTarget != this )
1328 {
1329 // don't delete the shape if we dropped it on ourselves!
1330 SetShape(NULL);
1331 }
1332 break;
1333
1334 case wxDragCancel:
1335 SetStatusText("Drag and drop operation cancelled");
1336 break;
1337 }
1338
1339 if ( pc )
1340 {
1341 SetStatusText(wxString("Shape successfully ") + pc);
1342 }
1343 //else: status text already set
1344 }
1345
1346 void DnDShapeFrame::OnDrop(wxCoord x, wxCoord y, DnDShape *shape)
1347 {
1348 ms_lastDropTarget = this;
1349
1350 wxPoint pt(x, y);
1351
1352 wxString s;
1353 s.Printf("Shape dropped at (%ld, %ld)", pt.x, pt.y);
1354 SetStatusText(s);
1355
1356 shape->Move(pt);
1357 SetShape(shape);
1358 }
1359
1360 void DnDShapeFrame::OnEditShape(wxCommandEvent& event)
1361 {
1362 DnDShapeDialog dlg(this, m_shape);
1363 if ( dlg.ShowModal() == wxID_OK )
1364 {
1365 SetShape(dlg.GetShape());
1366
1367 if ( m_shape )
1368 {
1369 SetStatusText("You can now drag the shape to another frame");
1370 }
1371 }
1372 }
1373
1374 void DnDShapeFrame::OnNewShape(wxCommandEvent& event)
1375 {
1376 SetShape(new DnDEllipticShape(wxPoint(10, 10), wxSize(80, 60), *wxRED));
1377
1378 SetStatusText("You can now drag the shape to another frame");
1379 }
1380
1381 void DnDShapeFrame::OnClearShape(wxCommandEvent& event)
1382 {
1383 SetShape(NULL);
1384 }
1385
1386 void DnDShapeFrame::OnCopyShape(wxCommandEvent& event)
1387 {
1388 if ( m_shape )
1389 {
1390 wxClipboardLocker clipLocker;
1391 if ( !clipLocker )
1392 {
1393 wxLogError("Can't open the clipboard");
1394
1395 return;
1396 }
1397
1398 wxTheClipboard->AddData(new DnDShapeDataObject(m_shape));
1399 }
1400 }
1401
1402 void DnDShapeFrame::OnPasteShape(wxCommandEvent& event)
1403 {
1404 wxClipboardLocker clipLocker;
1405 if ( !clipLocker )
1406 {
1407 wxLogError("Can't open the clipboard");
1408
1409 return;
1410 }
1411
1412 DnDShapeDataObject shapeDataObject(NULL);
1413 if ( wxTheClipboard->GetData(shapeDataObject) )
1414 {
1415 SetShape(shapeDataObject.GetShape());
1416 }
1417 else
1418 {
1419 wxLogStatus("No shape on the clipboard");
1420 }
1421 }
1422
1423 void DnDShapeFrame::OnUpdateUICopy(wxUpdateUIEvent& event)
1424 {
1425 event.Enable( m_shape != NULL );
1426 }
1427
1428 void DnDShapeFrame::OnUpdateUIPaste(wxUpdateUIEvent& event)
1429 {
1430 event.Enable( wxTheClipboard->IsSupported(wxDataFormat(shapeFormatId)) );
1431 }
1432
1433 void DnDShapeFrame::OnPaint(wxPaintEvent& event)
1434 {
1435 if ( m_shape )
1436 {
1437 wxPaintDC dc(this);
1438
1439 m_shape->Draw(dc);
1440 }
1441 else
1442 {
1443 event.Skip();
1444 }
1445 }
1446
1447 // ----------------------------------------------------------------------------
1448 // DnDShape
1449 // ----------------------------------------------------------------------------
1450
1451 DnDShape *DnDShape::New(const void *buf)
1452 {
1453 const ShapeDump& dump = *(const ShapeDump *)buf;
1454 switch ( dump.k )
1455 {
1456 case Triangle:
1457 return new DnDTriangularShape(wxPoint(dump.x, dump.y),
1458 wxSize(dump.w, dump.h),
1459 wxColour(dump.r, dump.g, dump.b));
1460
1461 case Rectangle:
1462 return new DnDRectangularShape(wxPoint(dump.x, dump.y),
1463 wxSize(dump.w, dump.h),
1464 wxColour(dump.r, dump.g, dump.b));
1465
1466 case Ellipse:
1467 return new DnDEllipticShape(wxPoint(dump.x, dump.y),
1468 wxSize(dump.w, dump.h),
1469 wxColour(dump.r, dump.g, dump.b));
1470
1471 default:
1472 wxFAIL_MSG("invalid shape!");
1473 return NULL;
1474 }
1475 }
1476
1477 // ----------------------------------------------------------------------------
1478 // DnDShapeDataObject
1479 // ----------------------------------------------------------------------------
1480
1481 void DnDShapeDataObject::CreateBitmap() const
1482 {
1483 wxPoint pos = m_shape->GetPosition();
1484 wxSize size = m_shape->GetSize();
1485 int x = pos.x + size.x,
1486 y = pos.y + size.y;
1487 wxBitmap bitmap(x, y);
1488 wxMemoryDC dc;
1489 dc.SelectObject(bitmap);
1490 dc.SetBrush(wxBrush("white", wxSOLID));
1491 dc.Clear();
1492 m_shape->Draw(dc);
1493 dc.SelectObject(wxNullBitmap);
1494
1495 DnDShapeDataObject *self = (DnDShapeDataObject *)this; // const_cast
1496 self->m_dataobj.SetBitmap(bitmap);
1497 self->m_hasBitmap = TRUE;
1498 }
1499
wxWidgets (Impactor)