projects / wxWidgets.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Added demo of strange rectangle behaviour
[wxWidgets.git] / samples / drawing / drawing.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: drawing.cpp
3 // Purpose: shows and tests wxDC features
4 // Author: Robert Roebling
5 // Modified by:
6 // Created: 04/01/98
7 // RCS-ID: $Id$
8 // Copyright: (c) Robert Roebling
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 #ifdef __GNUG__
21 #pragma implementation "drawing.cpp"
22 #pragma interface "drawing.cpp"
23 #endif
24
25 // For compilers that support precompilation, includes "wx/wx.h".
26 #include "wx/wxprec.h"
27
28 #ifdef __BORLANDC__
29 #pragma hdrstop
30 #endif
31
32 // for all others, include the necessary headers (this file is usually all you
33 // need because it includes almost all "standard" wxWindows headers
34 #ifndef WX_PRECOMP
35 #include "wx/wx.h"
36 #endif
37
38 #include "wx/colordlg.h"
39 #include "wx/image.h"
40
41 // ----------------------------------------------------------------------------
42 // ressources
43 // ----------------------------------------------------------------------------
44
45 // the application icon
46 #if defined(__WXGTK__) || defined(__WXMOTIF__)
47 #include "mondrian.xpm"
48 #endif
49
50 // ----------------------------------------------------------------------------
51 // constants
52 // ----------------------------------------------------------------------------
53
54 // what do we show on screen (there are too many shapes to put them all on
55 // screen simultaneously)
56 enum ScreenToShow
57 {
58 Show_Default,
59 Show_Text,
60 Show_Lines,
61 Show_Polygons,
62 Show_Mask,
63 Show_Ops
64 };
65
66 // ----------------------------------------------------------------------------
67 // global variables
68 // ----------------------------------------------------------------------------
69
70 static wxBitmap gs_bmpNoMask,
71 gs_bmpWithColMask,
72 gs_bmpMask,
73 gs_bmpWithMask,
74 gs_bmp4,
75 gs_bmp36;
76
77 // ----------------------------------------------------------------------------
78 // private classes
79 // ----------------------------------------------------------------------------
80
81 // Define a new application type, each program should derive a class from wxApp
82 class MyApp : public wxApp
83 {
84 public:
85 // override base class virtuals
86 // ----------------------------
87
88 // this one is called on application startup and is a good place for the app
89 // initialization (doing it here and not in the ctor allows to have an error
90 // return: if OnInit() returns false, the application terminates)
91 virtual bool OnInit();
92
93 protected:
94 bool LoadImages();
95 };
96
97 class MyCanvas;
98
99 // Define a new frame type: this is going to be our main frame
100 class MyFrame : public wxFrame
101 {
102 public:
103 // ctor(s)
104 MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
105
106 // event handlers (these functions should _not_ be virtual)
107 void OnQuit(wxCommandEvent& event);
108 void OnAbout(wxCommandEvent& event);
109 void OnShow(wxCommandEvent &event);
110 void OnOption(wxCommandEvent &event);
111
112 wxColour SelectColour();
113 void PrepareDC(wxDC& dc);
114
115 int m_backgroundMode;
116 int m_textureBackground;
117 int m_mapMode;
118 double m_xUserScale;
119 double m_yUserScale;
120 int m_xLogicalOrigin;
121 int m_yLogicalOrigin;
122 bool m_xAxisReversed,
123 m_yAxisReversed;
124 wxColour m_colourForeground, // these are _text_ colours
125 m_colourBackground;
126 wxBrush m_backgroundBrush;
127 MyCanvas *m_canvas;
128
129 private:
130 // any class wishing to process wxWindows events must use this macro
131 DECLARE_EVENT_TABLE()
132 };
133
134 // define a scrollable canvas for drawing onto
135 class MyCanvas: public wxScrolledWindow
136 {
137 public:
138 MyCanvas( MyFrame *parent );
139
140 void OnPaint(wxPaintEvent &event);
141 void OnMouseMove(wxMouseEvent &event);
142
143 void Show(ScreenToShow show) { m_show = show; Refresh(); }
144
145 protected:
146 void DrawTestPoly( int x, int y, wxDC &dc ,int transparent );
147 void DrawTestLines( int x, int y, int width, wxDC &dc );
148 void DrawText(wxDC& dc);
149 void DrawImages(wxDC& dc);
150 void DrawWithLogicalOps(wxDC& dc);
151 void DrawDefault(wxDC& dc);
152
153 private:
154 MyFrame *m_owner;
155
156 ScreenToShow m_show;
157
158 DECLARE_EVENT_TABLE()
159 };
160
161 // ----------------------------------------------------------------------------
162 // constants
163 // ----------------------------------------------------------------------------
164
165 // IDs for the controls and the menu commands
166 enum
167 {
168 // menu items
169 File_Quit = 1,
170 File_About,
171
172 MenuShow_First,
173 File_ShowDefault = MenuShow_First,
174 File_ShowText,
175 File_ShowLines,
176 File_ShowPolygons,
177 File_ShowMask,
178 File_ShowOps,
179 MenuShow_Last = File_ShowOps,
180
181 MenuOption_First,
182
183 MapMode_Text = MenuOption_First,
184 MapMode_Lometric,
185 MapMode_Twips,
186 MapMode_Points,
187 MapMode_Metric,
188
189 UserScale_StretchHoriz,
190 UserScale_ShrinkHoriz,
191 UserScale_StretchVertic,
192 UserScale_ShrinkVertic,
193 UserScale_Restore,
194
195 AxisMirror_Horiz,
196 AxisMirror_Vertic,
197
198 LogicalOrigin_MoveDown,
199 LogicalOrigin_MoveUp,
200 LogicalOrigin_MoveLeft,
201 LogicalOrigin_MoveRight,
202
203 Colour_TextForeground,
204 Colour_TextBackground,
205 Colour_Background,
206 Colour_BackgroundMode,
207 Colour_TextureBackgound,
208
209 MenuOption_Last = Colour_TextureBackgound
210 };
211
212 // ----------------------------------------------------------------------------
213 // event tables and other macros for wxWindows
214 // ----------------------------------------------------------------------------
215
216
217 // Create a new application object: this macro will allow wxWindows to create
218 // the application object during program execution (it's better than using a
219 // static object for many reasons) and also declares the accessor function
220 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
221 // not wxApp)
222 IMPLEMENT_APP(MyApp)
223
224 // ============================================================================
225 // implementation
226 // ============================================================================
227
228 // ----------------------------------------------------------------------------
229 // the application class
230 // ----------------------------------------------------------------------------
231
232 bool MyApp::LoadImages()
233 {
234 wxPathList pathList;
235 pathList.Add(".");
236 pathList.Add("..");
237
238 wxString path = pathList.FindValidPath("pat4.bmp");
239 if ( !path )
240 return FALSE;
241 gs_bmp4.LoadFile(path, wxBITMAP_TYPE_BMP);
242 wxMask* mask4 = new wxMask(gs_bmp4, *wxBLACK);
243 gs_bmp4.SetMask(mask4);
244
245 path = pathList.FindValidPath("pat36.bmp");
246 if ( !path )
247 return FALSE;
248 gs_bmp36.LoadFile(path, wxBITMAP_TYPE_BMP);
249 wxMask* mask36 = new wxMask(gs_bmp36, *wxBLACK);
250 gs_bmp36.SetMask(mask36);
251
252 path = pathList.FindValidPath("image.bmp");
253 if ( !path )
254 return FALSE;
255 gs_bmpNoMask.LoadFile(path, wxBITMAP_TYPE_BMP);
256 gs_bmpWithMask.LoadFile(path, wxBITMAP_TYPE_BMP);
257 gs_bmpWithColMask.LoadFile(path, wxBITMAP_TYPE_BMP);
258
259 path = pathList.FindValidPath("mask.bmp");
260 if ( !path )
261 return FALSE;
262 gs_bmpMask.LoadFile(path, wxBITMAP_TYPE_BMP);
263
264 // This is so wrong, it hurts.
265 // gs_bmpMask.SetDepth(1);
266 // wxMask *mask = new wxMask(gs_bmpMask);
267
268 wxMask *mask = new wxMask(gs_bmpMask, *wxBLACK);
269 gs_bmpWithMask.SetMask(mask);
270
271 mask = new wxMask(gs_bmpWithColMask, *wxWHITE);
272 gs_bmpWithColMask.SetMask(mask);
273
274 return TRUE;
275 }
276
277 // `Main program' equivalent: the program execution "starts" here
278 bool MyApp::OnInit()
279 {
280 // Create the main application window
281 MyFrame *frame = new MyFrame("Drawing sample",
282 wxPoint(50, 50), wxSize(550, 340));
283
284 // Show it and tell the application that it's our main window
285 frame->Show(TRUE);
286 SetTopWindow(frame);
287
288 if ( !LoadImages() )
289 {
290 wxLogError("Can't load one of the bitmap files needed for this sample "
291 "from the current or parent directory, please copy them "
292 "there.");
293
294 // stop here
295 return FALSE;
296 }
297
298 // ok, continue
299 return TRUE;
300 }
301
302 // ----------------------------------------------------------------------------
303 // MyCanvas
304 // ----------------------------------------------------------------------------
305
306 // the event tables connect the wxWindows events with the functions (event
307 // handlers) which process them.
308 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
309 EVT_PAINT (MyCanvas::OnPaint)
310 EVT_MOTION (MyCanvas::OnMouseMove)
311 END_EVENT_TABLE()
312
313 MyCanvas::MyCanvas( MyFrame *parent ) : wxScrolledWindow( parent )
314 {
315 m_owner = parent;
316 m_show = Show_Default;
317 }
318
319 //draw a polygon and an overlapping rectangle
320 //is transparent is 1, the fill pattern are made transparent
321 //is transparent is 2, the fill pattern are made transparent but inversed
322 //is transparent is 0 the text for and background color will be used to represent/map
323 //the colors of the monochrome bitmap pixels to the fillpattern
324 //
325 //i miss_used the the menu items for setting so called back and fore ground color
326 //just to show how the those colors do influence the fillpatterns
327 //just play with those,
328 //and with the code
329 //variations are endless using other logical functions
330 void MyCanvas::DrawTestPoly( int x, int y,wxDC &dc,int transparent )
331 {
332 wxBrush* brush4 = new wxBrush(gs_bmp4);
333 wxBrush* brush36 = new wxBrush(gs_bmp36);
334
335 wxPoint todraw[5];
336 todraw[0].x=(long)x+100;
337 todraw[0].y=(long)y+100;
338 todraw[1].x=(long)x+300;
339 todraw[1].y=(long)y+100;
340 todraw[2].x=(long)x+300;
341 todraw[2].y=(long)y+300;
342 todraw[3].x=(long)x+150;
343 todraw[3].y=(long)y+350;
344 todraw[4].x=(long)x+100;
345 todraw[4].y=(long)y+300;
346
347 wxPoint todraw2[5];
348 todraw2[0].x=100;
349 todraw2[0].y=100;
350 todraw2[1].x=300;
351 todraw2[1].y=100;
352 todraw2[2].x=300;
353 todraw2[2].y=300;
354 todraw2[3].x=150;
355 todraw2[3].y=350;
356 todraw2[4].x=100;
357 todraw2[4].y=300;
358
359 switch (transparent)
360 {
361 case 0:
362 {
363 dc.SetPen( wxPen( "black", 4, wxSOLID) );
364 dc.SetBrush( *brush4 );
365 dc.SetTextForeground(*wxGREEN);
366 dc.SetTextBackground(m_owner->m_colourForeground);
367 dc.SetLogicalFunction(wxCOPY);
368 dc.DrawPolygon(5,todraw,0,0,wxWINDING_RULE);
369
370 //don't understand hwo but the outline is also depending on logicalfunction
371 dc.SetPen( wxPen( "red", 4, wxSOLID) );
372 dc.SetBrush( *brush36 );
373 dc.SetTextForeground(*wxCYAN);
374 dc.SetTextBackground(m_owner->m_colourBackground);
375 dc.SetLogicalFunction(wxCOPY);
376 dc.DrawRectangle( x+10, y+10, 200, 200 );
377 dc.SetBrush(wxNullBrush);
378 dc.SetPen(wxNullPen);
379 break;
380 }
381 case 1: //now with transparent fillpatterns
382 {
383
384 wxBitmap* bmpBlit = new wxBitmap(600,400);
385 wxMemoryDC* memDC= new wxMemoryDC();
386 // wxBrush _clearbrush(*wxGREEN,wxSOLID);
387 wxBrush _clearbrush(*wxBLACK,wxSOLID);
388 memDC->SelectObject(*bmpBlit);
389 memDC->BeginDrawing();
390 memDC->SetBackground(_clearbrush);
391 memDC->Clear();
392 memDC->SetBackground(wxNullBrush);
393
394 memDC->SetPen( wxPen( "black", 4, wxSOLID) );
395 memDC->SetBrush( wxNullBrush);
396 memDC->SetBrush( *brush4 );
397 memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
398 memDC->SetTextBackground(*wxWHITE); // 1s --> 0xFFFFFF (white)
399 memDC->SetLogicalFunction(wxAND_INVERT);
400
401 // BLACK OUT the opaque pixels and leave the rest as is
402 memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
403
404 // Set background and foreground colors for fill pattern
405 //the previous blacked out pixels are now merged with the layer color
406 //while the non blacked out pixels stay as they are.
407 memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
408
409 //now define what will be the color of the fillpattern parts that are not transparent
410 // memDC->SetTextBackground(*wxBLUE);
411 memDC->SetTextBackground(m_owner->m_colourForeground);
412 memDC->SetLogicalFunction(wxOR);
413
414
415 //don't understand how but the outline is also depending on logicalfunction
416 memDC->SetPen( wxPen( "red", 4, wxSOLID) );
417 memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
418
419 memDC->SetLogicalFunction(wxCOPY);
420
421 memDC->SetPen( wxPen( "black", 4, wxSOLID) );
422 memDC->SetBrush( wxNullBrush);
423 memDC->SetBrush( *brush36 );
424 memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
425 memDC->SetTextBackground(*wxWHITE); // 1s --> 0xFFFFFF (white)
426 memDC->SetLogicalFunction(wxAND_INVERT);
427
428 memDC->DrawRectangle( 10, 10, 200, 200 );
429
430 // Set background and foreground colors for fill pattern
431 //the previous blacked out pixels are now merged with the layer color
432 //while the non blacked out pixels stay as they are.
433 memDC->SetTextForeground(*wxBLACK); // 0s --> 0x000000 (black)
434 //now define what will be the color of the fillpattern parts that are not transparent
435 // memDC->SetTextBackground(*wxRED);
436 memDC->SetTextBackground(m_owner->m_colourBackground);
437 memDC->SetLogicalFunction(wxOR);
438
439 //don't understand how but the outline is also depending on logicalfunction
440 memDC->SetPen( wxPen( "yellow", 4, wxSOLID) );
441 memDC->DrawRectangle( 10, 10, 200, 200 );
442
443 memDC->SetBrush(wxNullBrush);
444 memDC->SetPen(wxNullPen);
445
446 memDC->EndDrawing();
447 dc.Blit(x,y,600,400,memDC,0,0,wxCOPY);
448 delete bmpBlit;
449 delete memDC;
450 break;
451 }
452 case 2: //now with transparent inversed fillpatterns
453 {
454 wxBitmap* bmpBlit = new wxBitmap(600,400);
455 wxMemoryDC* memDC= new wxMemoryDC();
456 wxBrush _clearbrush(*wxWHITE,wxSOLID);
457 memDC->SelectObject(*bmpBlit);
458 memDC->BeginDrawing();
459 memDC->SetBackground(_clearbrush);
460 memDC->Clear();
461 memDC->SetBackground(wxNullBrush);
462
463 memDC->SetPen( wxPen( "black", 4, wxSOLID) );
464 memDC->SetBrush( *brush4 );
465 memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
466 memDC->SetTextForeground(*wxWHITE); // 1s --> 0xFFFFFF (white)
467 memDC->SetLogicalFunction(wxAND_INVERT);
468
469 // BLACK OUT the opaque pixels and leave the rest as is
470 memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
471
472 // Set background and foreground colors for fill pattern
473 //the previous blacked out pixels are now merged with the layer color
474 //while the non blacked out pixels stay as they are.
475 memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
476
477 //now define what will be the color of the fillpattern parts that are not transparent
478 memDC->SetTextForeground(m_owner->m_colourForeground);
479 memDC->SetLogicalFunction(wxOR);
480
481
482 //don't understand how but the outline is also depending on logicalfunction
483 memDC->SetPen( wxPen( "red", 4, wxSOLID) );
484 memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
485
486 memDC->SetLogicalFunction(wxCOPY);
487
488 memDC->SetPen( wxPen( "black", 4, wxSOLID) );
489 memDC->SetBrush( *brush36 );
490 memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
491 memDC->SetTextForeground(*wxWHITE); // 1s --> 0xFFFFFF (white)
492 memDC->SetLogicalFunction(wxAND_INVERT);
493
494 memDC->DrawRectangle( 10,10, 200, 200 );
495
496 // Set background and foreground colors for fill pattern
497 //the previous blacked out pixels are now merged with the layer color
498 //while the non blacked out pixels stay as they are.
499 memDC->SetTextBackground(*wxBLACK); // 0s --> 0x000000 (black)
500 //now define what will be the color of the fillpattern parts that are not transparent
501 memDC->SetTextForeground(m_owner->m_colourBackground);
502 memDC->SetLogicalFunction(wxOR);
503
504 //don't understand how but the outline is also depending on logicalfunction
505 memDC->SetPen( wxPen( "yellow", 4, wxSOLID) );
506 memDC->DrawRectangle( 10, 10, 200, 200 );
507
508 memDC->SetBrush(wxNullBrush);
509 memDC->SetPen(wxNullPen);
510 dc.Blit(x,y,600,400,memDC,0,0,wxCOPY);
511 delete bmpBlit;
512 delete memDC;
513 }
514 }
515
516 delete brush4;
517 delete brush36;
518 }
519
520 void MyCanvas::DrawTestLines( int x, int y, int width, wxDC &dc )
521 {
522 dc.SetPen( wxPen( "black", width, wxSOLID) );
523 dc.SetBrush( *wxRED_BRUSH );
524 dc.DrawRectangle( x+10, y+10, 100, 190 );
525
526 dc.SetPen( wxPen( "black", width, wxSOLID) );
527 dc.DrawLine( x+20, y+20, 100, y+20 );
528 dc.SetPen( wxPen( "black", width, wxDOT) );
529 dc.DrawLine( x+20, y+30, 100, y+30 );
530 dc.SetPen( wxPen( "black", width, wxSHORT_DASH) );
531 dc.DrawLine( x+20, y+40, 100, y+40 );
532 dc.SetPen( wxPen( "black", width, wxLONG_DASH) );
533 dc.DrawLine( x+20, y+50, 100, y+50 );
534 dc.SetPen( wxPen( "black", width, wxDOT_DASH) );
535 dc.DrawLine( x+20, y+60, 100, y+60 );
536
537 dc.SetPen( wxPen( "black", width, wxBDIAGONAL_HATCH) );
538 dc.DrawLine( x+20, y+70, 100, y+70 );
539 dc.SetPen( wxPen( "black", width, wxCROSSDIAG_HATCH) );
540 dc.DrawLine( x+20, y+80, 100, y+80 );
541 dc.SetPen( wxPen( "black", width, wxFDIAGONAL_HATCH) );
542 dc.DrawLine( x+20, y+90, 100, y+90 );
543 dc.SetPen( wxPen( "black", width, wxCROSS_HATCH) );
544 dc.DrawLine( x+20, y+100, 100, y+100 );
545 dc.SetPen( wxPen( "black", width, wxHORIZONTAL_HATCH) );
546 dc.DrawLine( x+20, y+110, 100, y+110 );
547 dc.SetPen( wxPen( "black", width, wxVERTICAL_HATCH) );
548 dc.DrawLine( x+20, y+120, 100, y+120 );
549
550 wxPen ud( "black", width, wxUSER_DASH );
551 wxDash dash1[1];
552 dash1[0] = 0;
553 ud.SetDashes( 1, dash1 );
554 dc.DrawLine( x+20, y+140, 100, y+140 );
555 dash1[0] = 1;
556 ud.SetDashes( 1, dash1 );
557 dc.DrawLine( x+20, y+150, 100, y+150 );
558 dash1[0] = 2;
559 ud.SetDashes( 1, dash1 );
560 dc.DrawLine( x+20, y+160, 100, y+160 );
561 dash1[0] = 0xFF;
562 ud.SetDashes( 1, dash1 );
563 dc.DrawLine( x+20, y+170, 100, y+170 );
564 }
565
566 void MyCanvas::DrawDefault(wxDC& dc)
567 {
568 // mark the origin
569 dc.DrawCircle(0, 0, 10);
570 #if !(defined __WXGTK__) && !(defined __WXMOTIF__)
571 // not implemented in wxGTK or wxMOTIF :-(
572 dc.FloodFill(0, 0, wxColour(255, 0, 0));
573 #endif //
574
575 dc.DrawIcon( wxICON(mondrian), 40, 40 );
576
577 // this is the test for "blitting bitmap into DC damages selected brush"
578 // bug
579 dc.SetPen(*wxTRANSPARENT_PEN);
580 dc.SetBrush( *wxGREEN_BRUSH );
581 dc.DrawRectangle(100, 10, 40, 40);
582 dc.DrawBitmap(wxTheApp->GetStdIcon(wxICON_INFORMATION), 102, 12, TRUE);
583 dc.DrawRectangle(150, 10, 40, 40);
584 dc.DrawIcon(wxTheApp->GetStdIcon(wxICON_INFORMATION), 152, 12);
585 dc.DrawRectangle(200, 10, 40, 40);
586
587 // test for "transparent" bitmap drawing (it intersects with the last
588 // rectangle above)
589 //dc.SetBrush( *wxTRANSPARENT_BRUSH );
590 #include "../image/smile.xpm"
591 wxBitmap bmp(smile_xpm);
592 dc.DrawBitmap(bmp, 210, 30, TRUE);
593
594 dc.SetBrush( *wxBLACK_BRUSH );
595 dc.DrawRectangle( 0, 160, 1000, 300 );
596
597 // draw lines
598 wxBitmap bitmap(20,70);
599 wxMemoryDC memdc;
600 memdc.SelectObject( bitmap );
601 memdc.SetBrush( *wxBLACK_BRUSH );
602 memdc.SetPen( *wxWHITE_PEN );
603 memdc.DrawRectangle(0,0,20,70);
604 memdc.DrawLine( 10,0,10,70 );
605
606 // to the right
607 wxPen pen = *wxRED_PEN;
608 pen.SetWidth(2);
609 memdc.SetPen(pen);
610 memdc.DrawLine( 10, 5,10, 5 );
611 memdc.DrawLine( 10,10,11,10 );
612 memdc.DrawLine( 10,15,12,15 );
613 memdc.DrawLine( 10,20,13,20 );
614
615 /*
616 memdc.SetPen(*wxRED_PEN);
617 memdc.DrawLine( 12, 5,12, 5 );
618 memdc.DrawLine( 12,10,13,10 );
619 memdc.DrawLine( 12,15,14,15 );
620 memdc.DrawLine( 12,20,15,20 );
621 */
622
623 // same to the left
624 memdc.DrawLine( 10,25,10,25 );
625 memdc.DrawLine( 10,30, 9,30 );
626 memdc.DrawLine( 10,35, 8,35 );
627 memdc.DrawLine( 10,40, 7,40 );
628
629 // XOR draw lines
630 dc.SetPen(*wxWHITE_PEN);
631 memdc.SetLogicalFunction( wxINVERT );
632 memdc.SetPen( *wxWHITE_PEN );
633 memdc.DrawLine( 10,50,10,50 );
634 memdc.DrawLine( 10,55,11,55 );
635 memdc.DrawLine( 10,60,12,60 );
636 memdc.DrawLine( 10,65,13,65 );
637
638 memdc.DrawLine( 12,50,12,50 );
639 memdc.DrawLine( 12,55,13,55 );
640 memdc.DrawLine( 12,60,14,60 );
641 memdc.DrawLine( 12,65,15,65 );
642
643 memdc.SelectObject( wxNullBitmap );
644 dc.DrawBitmap( bitmap, 10, 170 );
645 wxImage image( bitmap );
646 image.Rescale( 60,210 );
647 bitmap = image.ConvertToBitmap();
648 dc.DrawBitmap( bitmap, 50, 170 );
649
650 // test the rectangle outline drawing - there should be one pixel between
651 // the rect and the lines
652 dc.SetPen(*wxWHITE_PEN);
653 dc.SetBrush( *wxTRANSPARENT_BRUSH );
654 dc.DrawRectangle(150, 170, 49, 29);
655 dc.DrawRectangle(200, 170, 49, 29);
656 dc.SetPen(*wxWHITE_PEN);
657 dc.DrawLine(250, 210, 250, 170);
658 dc.DrawLine(260, 200, 150, 200);
659
660 // test the rectangle filled drawing - there should be one pixel between
661 // the rect and the lines
662 dc.SetPen(*wxTRANSPARENT_PEN);
663 dc.SetBrush( *wxWHITE_BRUSH );
664 dc.DrawRectangle(300, 170, 49, 29);
665 dc.DrawRectangle(350, 170, 49, 29);
666 dc.SetPen(*wxWHITE_PEN);
667 dc.DrawLine(400, 170, 400, 210);
668 dc.DrawLine(300, 200, 410, 200);
669
670 // and now for filled rect with outline
671 dc.SetPen(*wxRED_PEN);
672 dc.SetBrush( *wxWHITE_BRUSH );
673 dc.DrawRectangle(500, 170, 49, 29);
674 dc.DrawRectangle(550, 170, 49, 29);
675 dc.SetPen(*wxWHITE_PEN);
676 dc.DrawLine(600, 170, 600, 210);
677 dc.DrawLine(500, 200, 610, 200);
678
679 // test the rectangle outline drawing - there should be one pixel between
680 // the rect and the lines
681 dc.SetPen(*wxWHITE_PEN);
682 dc.SetBrush( *wxTRANSPARENT_BRUSH );
683 dc.DrawRoundedRectangle(150, 270, 49, 29, 6);
684 dc.DrawRoundedRectangle(200, 270, 49, 29, 6);
685 dc.SetPen(*wxWHITE_PEN);
686 dc.DrawLine(250, 270, 250, 310);
687 dc.DrawLine(150, 300, 260, 300);
688
689 // test the rectangle filled drawing - there should be one pixel between
690 // the rect and the lines
691 dc.SetPen(*wxTRANSPARENT_PEN);
692 dc.SetBrush( *wxWHITE_BRUSH );
693 dc.DrawRoundedRectangle(300, 270, 49, 29, 6);
694 dc.DrawRoundedRectangle(350, 270, 49, 29, 6);
695 dc.SetPen(*wxWHITE_PEN);
696 dc.DrawLine(400, 270, 400, 310);
697 dc.DrawLine(300, 300, 410, 300);
698
699 // Added by JACS to demonstrate bizarre behaviour.
700 // With a size of 70, we get a missing red RHS,
701 // and the hight is too small, so we get yellow
702 // showing. With a size of 40, it draws as expected:
703 // it just shows a white rectangle with red outline.
704 int totalWidth = 70;
705 int totalHeight = 70;
706 wxBitmap bitmap2(totalWidth, totalHeight);
707
708 wxMemoryDC memdc2;
709 memdc2.SelectObject(bitmap2);
710
711 memdc2.SetBackground(*wxWHITE_BRUSH);
712
713 // Draw a yellow rectangle filling the bitmap
714 memdc2.SetPen(wxPen(wxColour(255, 255, 0), 1, wxSOLID));
715 memdc2.SetBrush(wxBrush(wxColour(255, 255, 0), wxSOLID));
716 memdc2.DrawRectangle(0, 0, totalWidth+2, totalHeight+2); // Just to make sure!
717
718 // Now draw a white rectangle with red outline. It should
719 // entirely eclipse the yellow background.
720 memdc2.SetPen(*wxRED_PEN);
721 memdc2.SetBrush(*wxWHITE_BRUSH);
722
723 memdc2.DrawRectangle(0, 0, totalWidth, totalHeight);
724
725 memdc2.SelectObject(wxNullBitmap);
726 memdc2.SetPen(wxNullPen);
727 memdc2.SetBrush(wxNullBrush);
728
729 dc.DrawBitmap(bitmap2, 500, 270);
730 }
731
732 void MyCanvas::DrawText(wxDC& dc)
733 {
734 // set underlined font for testing
735 dc.SetFont( wxFont(12, wxMODERN, wxNORMAL, wxNORMAL, TRUE) );
736 dc.DrawText( "This is text", 110, 10 );
737 dc.DrawRotatedText( "That is text", 20, 10, -45 );
738
739 dc.SetFont( *wxNORMAL_FONT );
740
741 wxString text;
742 dc. SetBackgroundMode(wxTRANSPARENT);
743
744 for ( int n = -180; n < 180; n += 30 )
745 {
746 text.Printf(" %d rotated text", n);
747 dc.DrawRotatedText(text , 400, 400, n);
748 }
749
750 dc.SetFont( wxFont( 18, wxSWISS, wxNORMAL, wxNORMAL ) );
751
752 dc.DrawText( "This is Swiss 18pt text.", 110, 40 );
753
754 long length;
755 long height;
756 long descent;
757 dc.GetTextExtent( "This is Swiss 18pt text.", &length, &height, &descent );
758 text.Printf( "Dimensions are length %ld, height %ld, descent %ld", length, height, descent );
759 dc.DrawText( text, 110, 80 );
760
761 text.Printf( "CharHeight() returns: %d", dc.GetCharHeight() );
762 dc.DrawText( text, 110, 120 );
763
764 dc.DrawRectangle( 100, 40, 4, height );
765 }
766
767 static const struct
768 {
769 const wxChar *name;
770 int rop;
771 } rasterOperations[] =
772 {
773 { "wxAND", wxAND },
774 { "wxAND_INVERT", wxAND_INVERT },
775 { "wxAND_REVERSE", wxAND_REVERSE },
776 { "wxCLEAR", wxCLEAR },
777 { "wxCOPY", wxCOPY },
778 { "wxEQUIV", wxEQUIV },
779 { "wxINVERT", wxINVERT },
780 { "wxNAND", wxNAND },
781 { "wxNO_OP", wxNO_OP },
782 { "wxOR", wxOR },
783 { "wxOR_INVERT", wxOR_INVERT },
784 { "wxOR_REVERSE", wxOR_REVERSE },
785 { "wxSET", wxSET },
786 { "wxSRC_INVERT", wxSRC_INVERT },
787 { "wxXOR", wxXOR },
788 };
789
790 void MyCanvas::DrawImages(wxDC& dc)
791 {
792 dc.DrawText("original image", 0, 0);
793 dc.DrawBitmap(gs_bmpNoMask, 0, 20, 0);
794 dc.DrawText("with colour mask", 0, 100);
795 dc.DrawBitmap(gs_bmpWithColMask, 0, 120, TRUE);
796 dc.DrawText("the mask image", 0, 200);
797 dc.DrawBitmap(gs_bmpMask, 0, 220, 0);
798 dc.DrawText("masked image", 0, 300);
799 dc.DrawBitmap(gs_bmpWithMask, 0, 320, TRUE);
800
801 int cx = gs_bmpWithColMask.GetWidth(),
802 cy = gs_bmpWithColMask.GetHeight();
803
804 wxMemoryDC memDC;
805 for ( size_t n = 0; n < WXSIZEOF(rasterOperations); n++ )
806 {
807 wxCoord x = 120 + 150*(n%4),
808 y = 20 + 100*(n/4);
809
810 dc.DrawText(rasterOperations[n].name, x, y - 20);
811 memDC.SelectObject(gs_bmpWithColMask);
812 dc.Blit(x, y, cx, cy, &memDC, 0, 0, rasterOperations[n].rop, TRUE);
813 }
814 }
815
816 void MyCanvas::DrawWithLogicalOps(wxDC& dc)
817 {
818 static const wxCoord w = 60;
819 static const wxCoord h = 60;
820
821 // reuse the text colour here
822 dc.SetPen(wxPen(m_owner->m_colourForeground, 1, wxSOLID));
823 dc.SetBrush(*wxTRANSPARENT_BRUSH);
824
825 size_t n;
826 for ( n = 0; n < WXSIZEOF(rasterOperations); n++ )
827 {
828 wxCoord x = 20 + 150*(n%4),
829 y = 20 + 100*(n/4);
830
831 dc.DrawText(rasterOperations[n].name, x, y - 20);
832 dc.SetLogicalFunction(rasterOperations[n].rop);
833 dc.DrawRectangle(x, y, w, h);
834 dc.DrawLine(x, y, x + w, y + h);
835 dc.DrawLine(x + w, y, x, y + h);
836 }
837
838 // now some filled rectangles
839 dc.SetBrush(wxBrush(m_owner->m_colourForeground, wxSOLID));
840
841 for ( n = 0; n < WXSIZEOF(rasterOperations); n++ )
842 {
843 wxCoord x = 20 + 150*(n%4),
844 y = 500 + 100*(n/4);
845
846 dc.DrawText(rasterOperations[n].name, x, y - 20);
847 dc.SetLogicalFunction(rasterOperations[n].rop);
848 dc.DrawRectangle(x, y, w, h);
849 }
850 }
851
852 void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event))
853 {
854 wxPaintDC dc(this);
855 PrepareDC(dc);
856 m_owner->PrepareDC(dc);
857
858 dc.SetBackgroundMode( m_owner->m_backgroundMode );
859 if ( m_owner->m_backgroundBrush.Ok() )
860 dc.SetBackground( m_owner->m_backgroundBrush );
861 if ( m_owner->m_colourForeground.Ok() )
862 dc.SetTextForeground( m_owner->m_colourForeground );
863 if ( m_owner->m_colourBackground.Ok() )
864 dc.SetTextBackground( m_owner->m_colourBackground );
865
866 if ( m_owner->m_textureBackground) {
867 if ( ! m_owner->m_backgroundBrush.Ok() ) {
868 wxBrush b(wxColour(0,128,0), wxSOLID);
869 dc.SetBackground(b);
870 }
871 }
872
873 dc.Clear();
874
875 if ( m_owner->m_textureBackground) {
876 dc.SetPen(*wxMEDIUM_GREY_PEN);
877 for (int i=0; i<200; i++)
878 dc.DrawLine(0, i*10, i*10, 0);
879 }
880
881 switch ( m_show )
882 {
883 case Show_Default:
884 DrawDefault(dc);
885 break;
886
887 case Show_Text:
888 DrawText(dc);
889 break;
890
891 case Show_Lines:
892 DrawTestLines( 0, 100, 0, dc );
893 DrawTestLines( 0, 300, 1, dc );
894 DrawTestLines( 0, 500, 2, dc );
895 DrawTestLines( 0, 700, 6, dc );
896 break;
897
898 case Show_Polygons:
899 DrawTestPoly( 0, 100, dc, 0 );
900 DrawTestPoly( 33, 500, dc, 1 );
901 DrawTestPoly( 43, 1000, dc, 2 );
902 break;
903
904 case Show_Mask:
905 DrawImages(dc);
906 break;
907
908 case Show_Ops:
909 DrawWithLogicalOps(dc);
910 break;
911 }
912 }
913
914 void MyCanvas::OnMouseMove(wxMouseEvent &event)
915 {
916 wxClientDC dc(this);
917 PrepareDC(dc);
918 m_owner->PrepareDC(dc);
919
920 wxPoint pos = event.GetPosition();
921 long x = dc.DeviceToLogicalX( pos.x );
922 long y = dc.DeviceToLogicalY( pos.y );
923 wxString str;
924 str.Printf( "Current mouse position: %d,%d", (int)x, (int)y );
925 m_owner->SetStatusText( str );
926 }
927
928 // ----------------------------------------------------------------------------
929 // MyFrame
930 // ----------------------------------------------------------------------------
931
932 // the event tables connect the wxWindows events with the functions (event
933 // handlers) which process them. It can be also done at run-time, but for the
934 // simple menu events like this the static method is much simpler.
935 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
936 EVT_MENU (File_Quit, MyFrame::OnQuit)
937 EVT_MENU (File_About, MyFrame::OnAbout)
938
939 EVT_MENU_RANGE(MenuShow_First, MenuShow_Last, MyFrame::OnShow)
940
941 EVT_MENU_RANGE(MenuOption_First, MenuOption_Last, MyFrame::OnOption)
942 END_EVENT_TABLE()
943
944 // frame constructor
945 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
946 : wxFrame((wxFrame *)NULL, -1, title, pos, size)
947 {
948 // set the frame icon
949 SetIcon(wxICON(mondrian));
950
951 wxMenu *menuFile = new wxMenu;
952 menuFile->Append(File_ShowDefault, "&Default screen\tF1");
953 menuFile->Append(File_ShowText, "&Text screen\tF2");
954 menuFile->Append(File_ShowLines, "&Lines screen\tF3");
955 menuFile->Append(File_ShowPolygons, "&Polygons screen\tF4");
956 menuFile->Append(File_ShowMask, "wx&Mask screen\tF5");
957 menuFile->Append(File_ShowOps, "&ROP screen\tF6");
958 menuFile->AppendSeparator();
959 menuFile->Append(File_About, "&About...\tCtrl-A", "Show about dialog");
960 menuFile->AppendSeparator();
961 menuFile->Append(File_Quit, "E&xit\tAlt-X", "Quit this program");
962
963 wxMenu *menuMapMode = new wxMenu;
964 menuMapMode->Append( MapMode_Text, "&TEXT map mode" );
965 menuMapMode->Append( MapMode_Lometric, "&LOMETRIC map mode" );
966 menuMapMode->Append( MapMode_Twips, "T&WIPS map mode" );
967 menuMapMode->Append( MapMode_Points, "&POINTS map mode" );
968 menuMapMode->Append( MapMode_Metric, "&METRIC map mode" );
969
970 wxMenu *menuUserScale = new wxMenu;
971 menuUserScale->Append( UserScale_StretchHoriz, "Stretch horizontally\tCtrl-H" );
972 menuUserScale->Append( UserScale_ShrinkHoriz, "Shrink horizontally\tCtrl-G" );
973 menuUserScale->Append( UserScale_StretchVertic, "Stretch vertically\tCtrl-V" );
974 menuUserScale->Append( UserScale_ShrinkVertic, "Shrink vertically\tCtrl-W" );
975 menuUserScale->AppendSeparator();
976 menuUserScale->Append( UserScale_Restore, "Restore to normal\tCtrl-0" );
977
978 wxMenu *menuAxis = new wxMenu;
979 menuAxis->Append( AxisMirror_Horiz, "Mirror horizontally\tCtrl-M", "", TRUE );
980 menuAxis->Append( AxisMirror_Vertic, "Mirror vertically\tCtrl-N", "", TRUE );
981
982 wxMenu *menuLogical = new wxMenu;
983 menuLogical->Append( LogicalOrigin_MoveDown, "Move &down\tCtrl-D" );
984 menuLogical->Append( LogicalOrigin_MoveUp, "Move &up\tCtrl-U" );
985 menuLogical->Append( LogicalOrigin_MoveLeft, "Move &right\tCtrl-L" );
986 menuLogical->Append( LogicalOrigin_MoveRight, "Move &left\tCtrl-R" );
987
988 wxMenu *menuColour = new wxMenu;
989 menuColour->Append( Colour_TextForeground, "Text foreground..." );
990 menuColour->Append( Colour_TextBackground, "Text background..." );
991 menuColour->Append( Colour_Background, "Background colour..." );
992 menuColour->Append( Colour_BackgroundMode, "Opaque/transparent\tCtrl-B", "", TRUE );
993 menuColour->Append( Colour_TextureBackgound, "Draw textured background\tCtrl-T", "", TRUE);
994
995 // now append the freshly created menu to the menu bar...
996 wxMenuBar *menuBar = new wxMenuBar;
997 menuBar->Append(menuFile, "&File");
998 menuBar->Append(menuMapMode, "&MapMode");
999 menuBar->Append(menuUserScale, "&UserScale");
1000 menuBar->Append(menuAxis, "&Axis");
1001 menuBar->Append(menuLogical, "&LogicalOrigin");
1002 menuBar->Append(menuColour, "&Colours");
1003
1004 // ... and attach this menu bar to the frame
1005 SetMenuBar(menuBar);
1006
1007 // create a status bar just for fun (by default with 1 pane only)
1008 CreateStatusBar(2);
1009 SetStatusText("Welcome to wxWindows!");
1010
1011 m_mapMode = wxMM_TEXT;
1012 m_xUserScale = 1.0;
1013 m_yUserScale = 1.0;
1014 m_xLogicalOrigin = 0;
1015 m_yLogicalOrigin = 0;
1016 m_xAxisReversed =
1017 m_yAxisReversed = FALSE;
1018 m_backgroundMode = wxSOLID;
1019 m_colourForeground = *wxRED;
1020 m_colourBackground = *wxBLUE;
1021 m_textureBackground = FALSE;
1022
1023 m_canvas = new MyCanvas( this );
1024 m_canvas->SetScrollbars( 10, 10, 100, 240 );
1025 }
1026
1027 // event handlers
1028
1029 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
1030 {
1031 // TRUE is to force the frame to close
1032 Close(TRUE);
1033 }
1034
1035 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
1036 {
1037 wxString msg;
1038 msg.Printf( _T("This is the about dialog of the drawing sample.\n")
1039 _T("Copyright (c) Robert Roebling 1999")
1040 );
1041
1042 wxMessageBox(msg, "About Drawing", wxOK | wxICON_INFORMATION, this);
1043 }
1044
1045 void MyFrame::OnShow(wxCommandEvent& event)
1046 {
1047 m_canvas->Show((ScreenToShow)(event.GetInt() - MenuShow_First));
1048 }
1049
1050 void MyFrame::OnOption(wxCommandEvent& event)
1051 {
1052 switch (event.GetInt())
1053 {
1054 case MapMode_Text:
1055 m_mapMode = wxMM_TEXT;
1056 break;
1057 case MapMode_Lometric:
1058 m_mapMode = wxMM_LOMETRIC;
1059 break;
1060 case MapMode_Twips:
1061 m_mapMode = wxMM_TWIPS;
1062 break;
1063 case MapMode_Points:
1064 m_mapMode = wxMM_POINTS;
1065 break;
1066 case MapMode_Metric:
1067 m_mapMode = wxMM_METRIC;
1068 break;
1069
1070 case LogicalOrigin_MoveDown:
1071 m_yLogicalOrigin += 10;
1072 break;
1073 case LogicalOrigin_MoveUp:
1074 m_yLogicalOrigin -= 10;
1075 break;
1076 case LogicalOrigin_MoveLeft:
1077 m_xLogicalOrigin += 10;
1078 break;
1079 case LogicalOrigin_MoveRight:
1080 m_xLogicalOrigin -= 10;
1081 break;
1082
1083 case UserScale_StretchHoriz:
1084 m_xUserScale *= 1.10;
1085 break;
1086 case UserScale_ShrinkHoriz:
1087 m_xUserScale /= 1.10;
1088 break;
1089 case UserScale_StretchVertic:
1090 m_yUserScale *= 1.10;
1091 break;
1092 case UserScale_ShrinkVertic:
1093 m_yUserScale /= 1.10;
1094 break;
1095 case UserScale_Restore:
1096 m_xUserScale =
1097 m_yUserScale = 1.0;
1098 break;
1099
1100 case AxisMirror_Vertic:
1101 m_yAxisReversed = !m_yAxisReversed;
1102 break;
1103 case AxisMirror_Horiz:
1104 m_xAxisReversed = !m_xAxisReversed;
1105 break;
1106
1107 case Colour_TextForeground:
1108 m_colourForeground = SelectColour();
1109 break;
1110 case Colour_TextBackground:
1111 m_colourBackground = SelectColour();
1112 break;
1113 case Colour_Background:
1114 {
1115 wxColour col = SelectColour();
1116 if ( col.Ok() )
1117 {
1118 m_backgroundBrush.SetColour(col);
1119 }
1120 }
1121 break;
1122 case Colour_BackgroundMode:
1123 m_backgroundMode = m_backgroundMode == wxSOLID ? wxTRANSPARENT
1124 : wxSOLID;
1125 break;
1126
1127 case Colour_TextureBackgound:
1128 m_textureBackground = ! m_textureBackground;
1129 break;
1130
1131 default:
1132 // skip Refresh()
1133 return;
1134 }
1135
1136 m_canvas->Refresh();
1137 }
1138
1139 void MyFrame::PrepareDC(wxDC& dc)
1140 {
1141 dc.SetMapMode( m_mapMode );
1142 dc.SetUserScale( m_xUserScale, m_yUserScale );
1143 dc.SetLogicalOrigin( m_xLogicalOrigin, m_yLogicalOrigin );
1144 dc.SetAxisOrientation( !m_xAxisReversed, m_yAxisReversed );
1145 }
1146
1147 wxColour MyFrame::SelectColour()
1148 {
1149 wxColour col;
1150 wxColourData data;
1151 wxColourDialog dialog(this, &data);
1152
1153 if ( dialog.ShowModal() == wxID_OK )
1154 {
1155 col = dialog.GetColourData().GetColour();
1156 }
1157
1158 return col;
1159 }
wxWidgets (Impactor)