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