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 #if defined(__GNUG__) && !defined(__APPLE__)
  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 #include "wx/artprov.h"
  41
  42 // ----------------------------------------------------------------------------
  43 // ressources
  44 // ----------------------------------------------------------------------------
  45
  46 // the application icon
  47 #if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__)
  48     #include "mondrian.xpm"
  49 #endif
  50
  51 // ----------------------------------------------------------------------------
  52 // constants
  53 // ----------------------------------------------------------------------------
  54
  55 // what do we show on screen (there are too many shapes to put them all on
  56 // screen simultaneously)
  57 enum ScreenToShow
  58 {
  59     Show_Default,
  60     Show_Text,
  61     Show_Lines,
  62     Show_Brushes,
  63     Show_Polygons,
  64     Show_Mask,
  65     Show_Ops,
  66     Show_Regions,
  67     Show_Circles
  68 };
  69
  70 // ----------------------------------------------------------------------------
  71 // global variables
  72 // ----------------------------------------------------------------------------
  73
  74 static wxBitmap *gs_bmpNoMask = NULL,
  75                 *gs_bmpWithColMask = NULL,
  76                 *gs_bmpMask = NULL,
  77                 *gs_bmpWithMask = NULL,
  78                 *gs_bmp4 = NULL,
  79                 *gs_bmp4_mono = NULL,
  80                 *gs_bmp36 = NULL;
  81
  82 // ----------------------------------------------------------------------------
  83 // private classes
  84 // ----------------------------------------------------------------------------
  85
  86 // Define a new application type, each program should derive a class from wxApp
  87 class MyApp : public wxApp
  88 {
  89 public:
  90     // override base class virtuals
  91     // ----------------------------
  92
  93     // this one is called on application startup and is a good place for the app
  94     // initialization (doing it here and not in the ctor allows to have an error
  95     // return: if OnInit() returns false, the application terminates)
  96     virtual bool OnInit();
  97
  98     virtual int OnExit() { DeleteBitmaps(); return 0; }
  99
 100 protected:
 101     void DeleteBitmaps();
 102
 103     bool LoadImages();
 104 };
 105
 106 class MyCanvas;
 107
 108 // Define a new frame type: this is going to be our main frame
 109 class MyFrame : public wxFrame
 110 {
 111 public:
 112     // ctor(s)
 113     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
 114
 115     // event handlers (these functions should _not_ be virtual)
 116     void OnQuit(wxCommandEvent& event);
 117     void OnAbout(wxCommandEvent& event);
 118     void OnClip(wxCommandEvent& event);
 119     void OnShow(wxCommandEvent &event);
 120     void OnOption(wxCommandEvent &event);
 121
 122     wxColour SelectColour();
 123     void PrepareDC(wxDC& dc);
 124
 125     int         m_backgroundMode;
 126     int         m_textureBackground;
 127     int         m_mapMode;
 128     double      m_xUserScale;
 129     double      m_yUserScale;
 130     int         m_xLogicalOrigin;
 131     int         m_yLogicalOrigin;
 132     bool        m_xAxisReversed,
 133                 m_yAxisReversed;
 134     wxColour    m_colourForeground,    // these are _text_ colours
 135                 m_colourBackground;
 136     wxBrush     m_backgroundBrush;
 137     MyCanvas   *m_canvas;
 138
 139 private:
 140     // any class wishing to process wxWindows events must use this macro
 141     DECLARE_EVENT_TABLE()
 142 };
 143
 144 // define a scrollable canvas for drawing onto
 145 class MyCanvas: public wxScrolledWindow
 146 {
 147 public:
 148     MyCanvas( MyFrame *parent );
 149
 150     void OnPaint(wxPaintEvent &event);
 151     void OnMouseMove(wxMouseEvent &event);
 152
 153     void Show(ScreenToShow show) { m_show = show; Refresh(); }
 154
 155     // set or remove the clipping region
 156     void Clip(bool clip) { m_clip = clip; Refresh(); }
 157
 158 protected:
 159     void DrawTestLines( int x, int y, int width, wxDC &dc );
 160     void DrawTestPoly(wxDC& dc);
 161     void DrawTestBrushes(wxDC& dc);
 162     void DrawText(wxDC& dc);
 163     void DrawImages(wxDC& dc);
 164     void DrawWithLogicalOps(wxDC& dc);
 165     void DrawRegions(wxDC& dc);
 166     void DrawCircles(wxDC& dc);
 167     void DrawDefault(wxDC& dc);
 168
 169     void DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime);
 170
 171 private:
 172     MyFrame *m_owner;
 173
 174     ScreenToShow m_show;
 175     wxBitmap     m_smile_bmp;
 176     wxIcon       m_std_icon;
 177     bool         m_clip;
 178
 179     DECLARE_EVENT_TABLE()
 180 };
 181
 182 // ----------------------------------------------------------------------------
 183 // constants
 184 // ----------------------------------------------------------------------------
 185
 186 // IDs for the controls and the menu commands
 187 enum
 188 {
 189     // menu items
 190     File_Quit = 1,
 191     File_About,
 192
 193     MenuShow_First,
 194     File_ShowDefault = MenuShow_First,
 195     File_ShowText,
 196     File_ShowLines,
 197     File_ShowBrushes,
 198     File_ShowPolygons,
 199     File_ShowMask,
 200     File_ShowOps,
 201     File_ShowRegions,
 202     File_ShowCircles,
 203     MenuShow_Last = File_ShowCircles,
 204
 205     File_Clip,
 206
 207     MenuOption_First,
 208
 209     MapMode_Text = MenuOption_First,
 210     MapMode_Lometric,
 211     MapMode_Twips,
 212     MapMode_Points,
 213     MapMode_Metric,
 214
 215     UserScale_StretchHoriz,
 216     UserScale_ShrinkHoriz,
 217     UserScale_StretchVertic,
 218     UserScale_ShrinkVertic,
 219     UserScale_Restore,
 220
 221     AxisMirror_Horiz,
 222     AxisMirror_Vertic,
 223
 224     LogicalOrigin_MoveDown,
 225     LogicalOrigin_MoveUp,
 226     LogicalOrigin_MoveLeft,
 227     LogicalOrigin_MoveRight,
 228     LogicalOrigin_Set,
 229     LogicalOrigin_Restore,
 230
 231     Colour_TextForeground,
 232     Colour_TextBackground,
 233     Colour_Background,
 234     Colour_BackgroundMode,
 235     Colour_TextureBackgound,
 236
 237     MenuOption_Last = Colour_TextureBackgound
 238 };
 239
 240 // ----------------------------------------------------------------------------
 241 // event tables and other macros for wxWindows
 242 // ----------------------------------------------------------------------------
 243
 244
 245 // Create a new application object: this macro will allow wxWindows to create
 246 // the application object during program execution (it's better than using a
 247 // static object for many reasons) and also declares the accessor function
 248 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 249 // not wxApp)
 250 IMPLEMENT_APP(MyApp)
 251
 252 // ============================================================================
 253 // implementation
 254 // ============================================================================
 255
 256 // ----------------------------------------------------------------------------
 257 // the application class
 258 // ----------------------------------------------------------------------------
 259
 260 bool MyApp::LoadImages()
 261 {
 262     gs_bmpNoMask = new wxBitmap;
 263     gs_bmpWithColMask = new wxBitmap;
 264     gs_bmpMask = new wxBitmap;
 265     gs_bmpWithMask = new wxBitmap;
 266     gs_bmp4 = new wxBitmap;
 267     gs_bmp4_mono = new wxBitmap;
 268     gs_bmp36 = new wxBitmap;
 269
 270     wxPathList pathList;
 271     pathList.Add(_T("."));
 272     pathList.Add(_T(".."));
 273
 274     wxString path = pathList.FindValidPath(_T("pat4.bmp"));
 275     if ( !path )
 276         return FALSE;
 277
 278     /* 4 colour bitmap */
 279     gs_bmp4->LoadFile(path, wxBITMAP_TYPE_BMP);
 280     /* turn into mono-bitmap */
 281     gs_bmp4_mono->LoadFile(path, wxBITMAP_TYPE_BMP);
 282     wxMask* mask4 = new wxMask(*gs_bmp4_mono, *wxBLACK);
 283     gs_bmp4_mono->SetMask(mask4);
 284
 285     path = pathList.FindValidPath(_T("pat36.bmp"));
 286     if ( !path )
 287         return FALSE;
 288     gs_bmp36->LoadFile(path, wxBITMAP_TYPE_BMP);
 289     wxMask* mask36 = new wxMask(*gs_bmp36, *wxBLACK);
 290     gs_bmp36->SetMask(mask36);
 291
 292     path = pathList.FindValidPath(_T("image.bmp"));
 293     if ( !path )
 294         return FALSE;
 295     gs_bmpNoMask->LoadFile(path, wxBITMAP_TYPE_BMP);
 296     gs_bmpWithMask->LoadFile(path, wxBITMAP_TYPE_BMP);
 297     gs_bmpWithColMask->LoadFile(path, wxBITMAP_TYPE_BMP);
 298
 299     path = pathList.FindValidPath(_T("mask.bmp"));
 300     if ( !path )
 301         return FALSE;
 302     gs_bmpMask->LoadFile(path, wxBITMAP_TYPE_BMP);
 303
 304     wxMask *mask = new wxMask(*gs_bmpMask, *wxBLACK);
 305     gs_bmpWithMask->SetMask(mask);
 306
 307     mask = new wxMask(*gs_bmpWithColMask, *wxWHITE);
 308     gs_bmpWithColMask->SetMask(mask);
 309
 310     return TRUE;
 311 }
 312
 313 // `Main program' equivalent: the program execution "starts" here
 314 bool MyApp::OnInit()
 315 {
 316     // Create the main application window
 317     MyFrame *frame = new MyFrame(_T("Drawing sample"),
 318                                  wxPoint(50, 50), wxSize(550, 340));
 319
 320     // Show it and tell the application that it's our main window
 321     frame->Show(TRUE);
 322     SetTopWindow(frame);
 323
 324     if ( !LoadImages() )
 325     {
 326         wxLogError(wxT("Can't load one of the bitmap files needed ")
 327                    wxT("for this sample from the current or parent ")
 328                    wxT("directory, please copy them there."));
 329
 330         // stop here
 331         DeleteBitmaps();
 332
 333         return FALSE;
 334     }
 335
 336     // ok, continue
 337     return TRUE;
 338 }
 339
 340 void MyApp::DeleteBitmaps()
 341 {
 342     delete gs_bmpNoMask;
 343     delete gs_bmpWithColMask;
 344     delete gs_bmpMask;
 345     delete gs_bmpWithMask;
 346     delete gs_bmp4;
 347     delete gs_bmp4_mono;
 348     delete gs_bmp36;
 349
 350     gs_bmpNoMask = NULL;
 351     gs_bmpWithColMask = NULL;
 352     gs_bmpMask = NULL;
 353     gs_bmpWithMask = NULL;
 354     gs_bmp4 = NULL;
 355     gs_bmp4_mono = NULL;
 356     gs_bmp36 = NULL;
 357 }
 358
 359 // ----------------------------------------------------------------------------
 360 // MyCanvas
 361 // ----------------------------------------------------------------------------
 362
 363 // the event tables connect the wxWindows events with the functions (event
 364 // handlers) which process them.
 365 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 366     EVT_PAINT  (MyCanvas::OnPaint)
 367     EVT_MOTION (MyCanvas::OnMouseMove)
 368 END_EVENT_TABLE()
 369
 370 #include "smile.xpm"
 371
 372 MyCanvas::MyCanvas(MyFrame *parent)
 373         : wxScrolledWindow(parent, -1, wxDefaultPosition, wxDefaultSize,
 374                            wxHSCROLL | wxVSCROLL | wxNO_FULL_REPAINT_ON_RESIZE)
 375 {
 376     m_owner = parent;
 377     m_show = Show_Default;
 378     m_smile_bmp = wxBitmap(smile_xpm);
 379     m_std_icon = wxArtProvider::GetIcon(wxART_INFORMATION);
 380     m_clip = FALSE;
 381 }
 382
 383 void MyCanvas::DrawTestBrushes(wxDC& dc)
 384 {
 385     static const wxCoord WIDTH = 200;
 386     static const wxCoord HEIGHT = 80;
 387
 388     wxCoord x = 10,
 389             y = 10;
 390
 391     dc.SetBrush(wxBrush(*wxGREEN, wxSOLID));
 392     dc.DrawRectangle(x, y, WIDTH, HEIGHT);
 393     dc.DrawText(_T("Solid green"), x + 10, y + 10);
 394
 395     y += HEIGHT;
 396     dc.SetBrush(wxBrush(*wxRED, wxCROSSDIAG_HATCH));
 397     dc.DrawRectangle(x, y, WIDTH, HEIGHT);
 398     dc.DrawText(_T("Hatched red"), x + 10, y + 10);
 399
 400     y += HEIGHT;
 401     dc.SetBrush(wxBrush(*gs_bmpMask));
 402     dc.DrawRectangle(x, y, WIDTH, HEIGHT);
 403     dc.DrawText(_T("Stipple mono"), x + 10, y + 10);
 404
 405     y += HEIGHT;
 406     dc.SetBrush(wxBrush(*gs_bmpNoMask));
 407     dc.DrawRectangle(x, y, WIDTH, HEIGHT);
 408     dc.DrawText(_T("Stipple colour"), x + 10, y + 10);
 409 }
 410
 411 void MyCanvas::DrawTestPoly(wxDC& dc)
 412 {
 413     wxBrush brushHatch(*wxRED, wxFDIAGONAL_HATCH);
 414     dc.SetBrush(brushHatch);
 415
 416     wxPoint star[5];
 417     star[0] = wxPoint(100, 60);
 418     star[1] = wxPoint(60, 150);
 419     star[2] = wxPoint(160, 100);
 420     star[3] = wxPoint(40, 100);
 421     star[4] = wxPoint(140, 150);
 422
 423     dc.DrawText(_T("You should see two (irregular) stars below, the left one ")
 424                 _T("hatched"), 10, 10);
 425     dc.DrawText(_T("except for the central region and the right ")
 426                 _T("one entirely hatched"), 10, 30);
 427
 428     dc.DrawPolygon(WXSIZEOF(star), star);
 429     dc.DrawPolygon(WXSIZEOF(star), star, 160, 0, wxWINDING_RULE);
 430 }
 431
 432 void MyCanvas::DrawTestLines( int x, int y, int width, wxDC &dc )
 433 {
 434     dc.SetPen( wxPen( wxT("black"), width, wxSOLID) );
 435     dc.SetBrush( *wxRED_BRUSH );
 436     dc.DrawText(wxString::Format(wxT("Testing lines of width %d"), width), x + 10, y - 10);
 437     dc.DrawRectangle( x+10, y+10, 100, 190 );
 438
 439     dc.DrawText(_T("Solid/dot/short dash/long dash/dot dash"), x + 150, y + 10);
 440     dc.SetPen( wxPen( wxT("black"), width, wxSOLID) );
 441     dc.DrawLine( x+20, y+20, 100, y+20 );
 442     dc.SetPen( wxPen( wxT("black"), width, wxDOT) );
 443     dc.DrawLine( x+20, y+30, 100, y+30 );
 444     dc.SetPen( wxPen( wxT("black"), width, wxSHORT_DASH) );
 445     dc.DrawLine( x+20, y+40, 100, y+40 );
 446     dc.SetPen( wxPen( wxT("black"), width, wxLONG_DASH) );
 447     dc.DrawLine( x+20, y+50, 100, y+50 );
 448     dc.SetPen( wxPen( wxT("black"), width, wxDOT_DASH) );
 449     dc.DrawLine( x+20, y+60, 100, y+60 );
 450
 451     dc.DrawText(_T("Misc hatches"), x + 150, y + 70);
 452     dc.SetPen( wxPen( wxT("black"), width, wxBDIAGONAL_HATCH) );
 453     dc.DrawLine( x+20, y+70, 100, y+70 );
 454     dc.SetPen( wxPen( wxT("black"), width, wxCROSSDIAG_HATCH) );
 455     dc.DrawLine( x+20, y+80, 100, y+80 );
 456     dc.SetPen( wxPen( wxT("black"), width, wxFDIAGONAL_HATCH) );
 457     dc.DrawLine( x+20, y+90, 100, y+90 );
 458     dc.SetPen( wxPen( wxT("black"), width, wxCROSS_HATCH) );
 459     dc.DrawLine( x+20, y+100, 100, y+100 );
 460     dc.SetPen( wxPen( wxT("black"), width, wxHORIZONTAL_HATCH) );
 461     dc.DrawLine( x+20, y+110, 100, y+110 );
 462     dc.SetPen( wxPen( wxT("black"), width, wxVERTICAL_HATCH) );
 463     dc.DrawLine( x+20, y+120, 100, y+120 );
 464
 465     dc.DrawText(_T("User dash"), x + 150, y + 140);
 466     wxPen ud( wxT("black"), width, wxUSER_DASH );
 467     wxDash dash1[1];
 468     dash1[0] = 0;
 469     ud.SetDashes( 1, dash1 );
 470     dc.DrawLine( x+20, y+140, 100, y+140 );
 471     dash1[0] = 1;
 472     ud.SetDashes( 1, dash1 );
 473     dc.DrawLine( x+20, y+150, 100, y+150 );
 474     dash1[0] = 2;
 475     ud.SetDashes( 1, dash1 );
 476     dc.DrawLine( x+20, y+160, 100, y+160 );
 477     dash1[0] = 0x7F;
 478     ud.SetDashes( 1, dash1 );
 479     dc.DrawLine( x+20, y+170, 100, y+170 );
 480 }
 481
 482 void MyCanvas::DrawDefault(wxDC& dc)
 483 {
 484     // mark the origin
 485     dc.DrawCircle(0, 0, 10);
 486
 487     //flood fill using brush, starting at 1,1 and replacing whatever colour we find there
 488     dc.SetBrush(wxBrush(wxColour(128,128,0), wxSOLID));
 489     wxColour tmpColour ;
 490     dc.GetPixel(1,1, &tmpColour);
 491     dc.FloodFill(1,1, tmpColour, wxFLOOD_SURFACE);
 492
 493     dc.DrawCheckMark(5, 80, 15, 15);
 494     dc.DrawCheckMark(25, 80, 30, 30);
 495     dc.DrawCheckMark(60, 80, 60, 60);
 496
 497     // this is the test for "blitting bitmap into DC damages selected brush" bug
 498     wxCoord rectSize = m_std_icon.GetWidth() + 10;
 499     wxCoord x = 100;
 500     dc.SetPen(*wxTRANSPARENT_PEN);
 501     dc.SetBrush( *wxGREEN_BRUSH );
 502     dc.DrawRectangle(x, 10, rectSize, rectSize);
 503     dc.DrawBitmap(m_std_icon, x + 5, 15, TRUE);
 504     x += rectSize + 10;
 505     dc.DrawRectangle(x, 10, rectSize, rectSize);
 506     dc.DrawIcon(m_std_icon, x + 5, 15);
 507     x += rectSize + 10;
 508     dc.DrawRectangle(x, 10, rectSize, rectSize);
 509
 510     // test for "transparent" bitmap drawing (it intersects with the last
 511     // rectangle above)
 512     //dc.SetBrush( *wxTRANSPARENT_BRUSH );
 513
 514     if (m_smile_bmp.Ok())
 515         dc.DrawBitmap(m_smile_bmp, x + rectSize - 20, rectSize - 10, TRUE);
 516
 517     dc.SetBrush( *wxBLACK_BRUSH );
 518     dc.DrawRectangle( 0, 160, 1000, 300 );
 519
 520     // draw lines
 521     wxBitmap bitmap(20,70);
 522     wxMemoryDC memdc;
 523     memdc.SelectObject( bitmap );
 524     memdc.SetBrush( *wxBLACK_BRUSH );
 525     memdc.SetPen( *wxWHITE_PEN );
 526     memdc.DrawRectangle(0,0,20,70);
 527     memdc.DrawLine( 10,0,10,70 );
 528
 529     // to the right
 530     wxPen pen = *wxRED_PEN;
 531     memdc.SetPen(pen);
 532     memdc.DrawLine( 10, 5,10, 5 );
 533     memdc.DrawLine( 10,10,11,10 );
 534     memdc.DrawLine( 10,15,12,15 );
 535     memdc.DrawLine( 10,20,13,20 );
 536
 537 /*
 538     memdc.SetPen(*wxRED_PEN);
 539     memdc.DrawLine( 12, 5,12, 5 );
 540     memdc.DrawLine( 12,10,13,10 );
 541     memdc.DrawLine( 12,15,14,15 );
 542     memdc.DrawLine( 12,20,15,20 );
 543 */
 544
 545     // same to the left
 546     memdc.DrawLine( 10,25,10,25 );
 547     memdc.DrawLine( 10,30, 9,30 );
 548     memdc.DrawLine( 10,35, 8,35 );
 549     memdc.DrawLine( 10,40, 7,40 );
 550
 551     // XOR draw lines
 552     dc.SetPen(*wxWHITE_PEN);
 553     memdc.SetLogicalFunction( wxINVERT );
 554     memdc.SetPen( *wxWHITE_PEN );
 555     memdc.DrawLine( 10,50,10,50 );
 556     memdc.DrawLine( 10,55,11,55 );
 557     memdc.DrawLine( 10,60,12,60 );
 558     memdc.DrawLine( 10,65,13,65 );
 559
 560     memdc.DrawLine( 12,50,12,50 );
 561     memdc.DrawLine( 12,55,13,55 );
 562     memdc.DrawLine( 12,60,14,60 );
 563     memdc.DrawLine( 12,65,15,65 );
 564
 565     memdc.SelectObject( wxNullBitmap );
 566     dc.DrawBitmap( bitmap, 10, 170 );
 567     wxImage image = bitmap.ConvertToImage();
 568     image.Rescale( 60,210 );
 569     bitmap = wxBitmap(image);
 570     dc.DrawBitmap( bitmap, 50, 170 );
 571
 572     // test the rectangle outline drawing - there should be one pixel between
 573     // the rect and the lines
 574     dc.SetPen(*wxWHITE_PEN);
 575     dc.SetBrush( *wxTRANSPARENT_BRUSH );
 576     dc.DrawRectangle(150, 170, 49, 29);
 577     dc.DrawRectangle(200, 170, 49, 29);
 578     dc.SetPen(*wxWHITE_PEN);
 579     dc.DrawLine(250, 210, 250, 170);
 580     dc.DrawLine(260, 200, 150, 200);
 581
 582     // test the rectangle filled drawing - there should be one pixel between
 583     // the rect and the lines
 584     dc.SetPen(*wxTRANSPARENT_PEN);
 585     dc.SetBrush( *wxWHITE_BRUSH );
 586     dc.DrawRectangle(300, 170, 49, 29);
 587     dc.DrawRectangle(350, 170, 49, 29);
 588     dc.SetPen(*wxWHITE_PEN);
 589     dc.DrawLine(400, 170, 400, 210);
 590     dc.DrawLine(300, 200, 410, 200);
 591
 592     // a few more tests of this kind
 593     dc.SetPen(*wxRED_PEN);
 594     dc.SetBrush( *wxWHITE_BRUSH );
 595     dc.DrawRectangle(300, 220, 1, 1);
 596     dc.DrawRectangle(310, 220, 2, 2);
 597     dc.DrawRectangle(320, 220, 3, 3);
 598     dc.DrawRectangle(330, 220, 4, 4);
 599
 600     dc.SetPen(*wxTRANSPARENT_PEN);
 601     dc.SetBrush( *wxWHITE_BRUSH );
 602     dc.DrawRectangle(300, 230, 1, 1);
 603     dc.DrawRectangle(310, 230, 2, 2);
 604     dc.DrawRectangle(320, 230, 3, 3);
 605     dc.DrawRectangle(330, 230, 4, 4);
 606
 607     // and now for filled rect with outline
 608     dc.SetPen(*wxRED_PEN);
 609     dc.SetBrush( *wxWHITE_BRUSH );
 610     dc.DrawRectangle(500, 170, 49, 29);
 611     dc.DrawRectangle(550, 170, 49, 29);
 612     dc.SetPen(*wxWHITE_PEN);
 613     dc.DrawLine(600, 170, 600, 210);
 614     dc.DrawLine(500, 200, 610, 200);
 615
 616     // test the rectangle outline drawing - there should be one pixel between
 617     // the rect and the lines
 618     dc.SetPen(*wxWHITE_PEN);
 619     dc.SetBrush( *wxTRANSPARENT_BRUSH );
 620     dc.DrawRoundedRectangle(150, 270, 49, 29, 6);
 621     dc.DrawRoundedRectangle(200, 270, 49, 29, 6);
 622     dc.SetPen(*wxWHITE_PEN);
 623     dc.DrawLine(250, 270, 250, 310);
 624     dc.DrawLine(150, 300, 260, 300);
 625
 626     // test the rectangle filled drawing - there should be one pixel between
 627     // the rect and the lines
 628     dc.SetPen(*wxTRANSPARENT_PEN);
 629     dc.SetBrush( *wxWHITE_BRUSH );
 630     dc.DrawRoundedRectangle(300, 270, 49, 29, 6);
 631     dc.DrawRoundedRectangle(350, 270, 49, 29, 6);
 632     dc.SetPen(*wxWHITE_PEN);
 633     dc.DrawLine(400, 270, 400, 310);
 634     dc.DrawLine(300, 300, 410, 300);
 635
 636     // Added by JACS to demonstrate bizarre behaviour.
 637     // With a size of 70, we get a missing red RHS,
 638     // and the hight is too small, so we get yellow
 639     // showing. With a size of 40, it draws as expected:
 640     // it just shows a white rectangle with red outline.
 641     int totalWidth = 70;
 642     int totalHeight = 70;
 643     wxBitmap bitmap2(totalWidth, totalHeight);
 644
 645     wxMemoryDC memdc2;
 646     memdc2.SelectObject(bitmap2);
 647
 648     wxBrush yellowBrush(wxColour(255, 255, 0), wxSOLID);
 649     memdc2.SetBackground(yellowBrush);
 650     memdc2.Clear();
 651
 652     wxPen yellowPen(wxColour(255, 255, 0), 1, wxSOLID);
 653
 654     // Now draw a white rectangle with red outline. It should
 655     // entirely eclipse the yellow background.
 656     memdc2.SetPen(*wxRED_PEN);
 657     memdc2.SetBrush(*wxWHITE_BRUSH);
 658
 659     memdc2.DrawRectangle(0, 0, totalWidth, totalHeight);
 660
 661     memdc2.SetPen(wxNullPen);
 662     memdc2.SetBrush(wxNullBrush);
 663     memdc2.SelectObject(wxNullBitmap);
 664
 665     dc.DrawBitmap(bitmap2, 500, 270);
 666
 667     // Repeat, but draw directly on dc
 668     // Draw a yellow rectangle filling the bitmap
 669
 670     x = 600; int y = 270;
 671     dc.SetPen(yellowPen);
 672     dc.SetBrush(yellowBrush);
 673     dc.DrawRectangle(x, y, totalWidth, totalHeight);
 674
 675     // Now draw a white rectangle with red outline. It should
 676     // entirely eclipse the yellow background.
 677     dc.SetPen(*wxRED_PEN);
 678     dc.SetBrush(*wxWHITE_BRUSH);
 679
 680     dc.DrawRectangle(x, y, totalWidth, totalHeight);
 681 }
 682
 683 void MyCanvas::DrawText(wxDC& dc)
 684 {
 685     // set underlined font for testing
 686     dc.SetFont( wxFont(12, wxMODERN, wxNORMAL, wxNORMAL, TRUE) );
 687     dc.DrawText( _T("This is text"), 110, 10 );
 688     dc.DrawRotatedText( _T("That is text"), 20, 10, -45 );
 689
 690     // use wxSWISS_FONT and not wxNORMAL_FONT as the latter can't be rotated
 691     // under Win9x (it is not TrueType)
 692     dc.SetFont( *wxSWISS_FONT );
 693
 694     wxString text;
 695     dc.SetBackgroundMode(wxTRANSPARENT);
 696
 697     for ( int n = -180; n < 180; n += 30 )
 698     {
 699         text.Printf(wxT("     %d rotated text"), n);
 700         dc.DrawRotatedText(text , 400, 400, n);
 701     }
 702
 703     dc.SetFont( wxFont( 18, wxSWISS, wxNORMAL, wxNORMAL ) );
 704
 705     dc.DrawText( _T("This is Swiss 18pt text."), 110, 40 );
 706
 707     long length;
 708     long height;
 709     long descent;
 710     dc.GetTextExtent( _T("This is Swiss 18pt text."), &length, &height, &descent );
 711     text.Printf( wxT("Dimensions are length %ld, height %ld, descent %ld"), length, height, descent );
 712     dc.DrawText( text, 110, 80 );
 713
 714     text.Printf( wxT("CharHeight() returns: %d"), dc.GetCharHeight() );
 715     dc.DrawText( text, 110, 120 );
 716
 717     dc.DrawRectangle( 100, 40, 4, height );
 718
 719     // test the logical function effect
 720     wxCoord y = 150;
 721     dc.SetLogicalFunction(wxINVERT);
 722     dc.DrawText( _T("There should be no text below"), 110, 150 );
 723     dc.DrawRectangle( 110, y, 100, height );
 724
 725     // twice drawn inverted should result in invisible
 726     y += height;
 727     dc.DrawText( _T("Invisible text"), 110, y );
 728     dc.DrawRectangle( 110, y, 100, height );
 729     dc.DrawText( _T("Invisible text"), 110, y );
 730     dc.DrawRectangle( 110, y, 100, height );
 731     dc.SetLogicalFunction(wxCOPY);
 732
 733     y += height;
 734     dc.DrawRectangle( 110, y, 100, height );
 735     dc.DrawText( _T("Visible text"), 110, y );
 736 }
 737
 738 static const struct
 739 {
 740     const wxChar *name;
 741     int           rop;
 742 } rasterOperations[] =
 743 {
 744     { wxT("wxAND"),          wxAND           },
 745     { wxT("wxAND_INVERT"),   wxAND_INVERT    },
 746     { wxT("wxAND_REVERSE"),  wxAND_REVERSE   },
 747     { wxT("wxCLEAR"),        wxCLEAR         },
 748     { wxT("wxCOPY"),         wxCOPY          },
 749     { wxT("wxEQUIV"),        wxEQUIV         },
 750     { wxT("wxINVERT"),       wxINVERT        },
 751     { wxT("wxNAND"),         wxNAND          },
 752     { wxT("wxNO_OP"),        wxNO_OP         },
 753     { wxT("wxOR"),           wxOR            },
 754     { wxT("wxOR_INVERT"),    wxOR_INVERT     },
 755     { wxT("wxOR_REVERSE"),   wxOR_REVERSE    },
 756     { wxT("wxSET"),          wxSET           },
 757     { wxT("wxSRC_INVERT"),   wxSRC_INVERT    },
 758     { wxT("wxXOR"),          wxXOR           },
 759 };
 760
 761 void MyCanvas::DrawImages(wxDC& dc)
 762 {
 763     dc.DrawText(_T("original image"), 0, 0);
 764     dc.DrawBitmap(*gs_bmpNoMask, 0, 20, 0);
 765     dc.DrawText(_T("with colour mask"), 0, 100);
 766     dc.DrawBitmap(*gs_bmpWithColMask, 0, 120, TRUE);
 767     dc.DrawText(_T("the mask image"), 0, 200);
 768     dc.DrawBitmap(*gs_bmpMask, 0, 220, 0);
 769     dc.DrawText(_T("masked image"), 0, 300);
 770     dc.DrawBitmap(*gs_bmpWithMask, 0, 320, TRUE);
 771
 772     int cx = gs_bmpWithColMask->GetWidth(),
 773         cy = gs_bmpWithColMask->GetHeight();
 774
 775     wxMemoryDC memDC;
 776     for ( size_t n = 0; n < WXSIZEOF(rasterOperations); n++ )
 777     {
 778         wxCoord x = 120 + 150*(n%4),
 779                 y =  20 + 100*(n/4);
 780
 781         dc.DrawText(rasterOperations[n].name, x, y - 20);
 782         memDC.SelectObject(*gs_bmpWithColMask);
 783         dc.Blit(x, y, cx, cy, &memDC, 0, 0, rasterOperations[n].rop, TRUE);
 784     }
 785 }
 786
 787 void MyCanvas::DrawWithLogicalOps(wxDC& dc)
 788 {
 789     static const wxCoord w = 60;
 790     static const wxCoord h = 60;
 791
 792     // reuse the text colour here
 793     dc.SetPen(wxPen(m_owner->m_colourForeground, 1, wxSOLID));
 794     dc.SetBrush(*wxTRANSPARENT_BRUSH);
 795
 796     size_t n;
 797     for ( n = 0; n < WXSIZEOF(rasterOperations); n++ )
 798     {
 799         wxCoord x = 20 + 150*(n%4),
 800                 y = 20 + 100*(n/4);
 801
 802         dc.DrawText(rasterOperations[n].name, x, y - 20);
 803         dc.SetLogicalFunction(rasterOperations[n].rop);
 804         dc.DrawRectangle(x, y, w, h);
 805         dc.DrawLine(x, y, x + w, y + h);
 806         dc.DrawLine(x + w, y, x, y + h);
 807     }
 808
 809     // now some filled rectangles
 810     dc.SetBrush(wxBrush(m_owner->m_colourForeground, wxSOLID));
 811
 812     for ( n = 0; n < WXSIZEOF(rasterOperations); n++ )
 813     {
 814         wxCoord x = 20 + 150*(n%4),
 815                 y = 500 + 100*(n/4);
 816
 817         dc.DrawText(rasterOperations[n].name, x, y - 20);
 818         dc.SetLogicalFunction(rasterOperations[n].rop);
 819         dc.DrawRectangle(x, y, w, h);
 820     }
 821 }
 822
 823 void MyCanvas::DrawCircles(wxDC& dc)
 824 {
 825     int x = 100,
 826         y = 100,
 827         r = 20;
 828
 829     dc.DrawText(_T("Some circles"), 0, y);
 830     dc.DrawCircle(x, y, r);
 831     dc.DrawCircle(x + 2*r, y, r);
 832     dc.DrawCircle(x + 4*r, y, r);
 833
 834     y += 2*r;
 835     dc.DrawText(_T("And ellipses"), 0, y);
 836     dc.DrawEllipse(x - r, y, 2*r, r);
 837     dc.DrawEllipse(x + r, y, 2*r, r);
 838     dc.DrawEllipse(x + 3*r, y, 2*r, r);
 839
 840     y += 2*r;
 841     dc.DrawText(_T("And arcs"), 0, y);
 842     dc.DrawArc(x - r, y, x + r, y, x, y);
 843     dc.DrawArc(x + 4*r, y, x + 2*r, y, x + 3*r, y);
 844     dc.DrawArc(x + 5*r, y, x + 5*r, y, x + 6*r, y);
 845
 846     y += 2*r;
 847     dc.DrawEllipticArc(x - r, y, 2*r, r, 0, 90);
 848     dc.DrawEllipticArc(x + r, y, 2*r, r, 90, 180);
 849     dc.DrawEllipticArc(x + 3*r, y, 2*r, r, 180, 270);
 850     dc.DrawEllipticArc(x + 5*r, y, 2*r, r, 270, 360);
 851 }
 852
 853 void MyCanvas::DrawRegions(wxDC& dc)
 854 {
 855     dc.DrawText(_T("You should see a red rect partly covered by a cyan one ")
 856                 _T("on the left"), 10, 5);
 857     dc.DrawText(_T("and 5 smileys from which 4 are partially clipped on the right"),
 858                 10, 5 + dc.GetCharHeight());
 859     dc.DrawText(_T("The second copy should be identical but right part of it ")
 860                 _T("should be offset by 10 pixels."),
 861                 10, 5 + 2*dc.GetCharHeight());
 862
 863     DrawRegionsHelper(dc, 10, TRUE);
 864     DrawRegionsHelper(dc, 350, FALSE);
 865 }
 866
 867 void MyCanvas::DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime)
 868 {
 869     wxCoord y = 100;
 870
 871     dc.DestroyClippingRegion();
 872     dc.SetBrush( *wxWHITE_BRUSH );
 873     dc.SetPen( *wxTRANSPARENT_PEN );
 874     dc.DrawRectangle( x, y, 310, 310 );
 875
 876     dc.SetClippingRegion( x + 10, y + 10, 100, 270 );
 877
 878     dc.SetBrush( *wxRED_BRUSH );
 879     dc.DrawRectangle( x, y, 310, 310 );
 880
 881     dc.SetClippingRegion( x + 10, y + 10, 100, 100 );
 882
 883     dc.SetBrush( *wxCYAN_BRUSH );
 884     dc.DrawRectangle( x, y, 310, 310 );
 885
 886     dc.DestroyClippingRegion();
 887
 888     wxRegion region(x + 110, y + 20, 100, 270);
 889 #if !defined(__WXMOTIF__) && !defined(__WXMAC__)
 890     if ( !firstTime )
 891         region.Offset(10, 10);
 892 #endif
 893     dc.SetClippingRegion(region);
 894
 895     dc.SetBrush( *wxGREY_BRUSH );
 896     dc.DrawRectangle( x, y, 310, 310 );
 897
 898     if (m_smile_bmp.Ok())
 899     {
 900         dc.DrawBitmap( m_smile_bmp, x + 150, y + 150, TRUE );
 901         dc.DrawBitmap( m_smile_bmp, x + 130, y + 10,  TRUE );
 902         dc.DrawBitmap( m_smile_bmp, x + 130, y + 280, TRUE );
 903         dc.DrawBitmap( m_smile_bmp, x + 100, y + 70,  TRUE );
 904         dc.DrawBitmap( m_smile_bmp, x + 200, y + 70,  TRUE );
 905     }
 906 }
 907
 908 void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event))
 909 {
 910     wxPaintDC dc(this);
 911     PrepareDC(dc);
 912
 913     m_owner->PrepareDC(dc);
 914
 915     dc.SetBackgroundMode( m_owner->m_backgroundMode );
 916     if ( m_owner->m_backgroundBrush.Ok() )
 917         dc.SetBackground( m_owner->m_backgroundBrush );
 918     if ( m_owner->m_colourForeground.Ok() )
 919         dc.SetTextForeground( m_owner->m_colourForeground );
 920     if ( m_owner->m_colourBackground.Ok() )
 921         dc.SetTextBackground( m_owner->m_colourBackground );
 922
 923     if ( m_owner->m_textureBackground) {
 924         if ( ! m_owner->m_backgroundBrush.Ok() ) {
 925             wxBrush b(wxColour(0,128,0), wxSOLID);
 926             dc.SetBackground(b);
 927         }
 928     }
 929
 930     if ( m_clip )
 931         dc.SetClippingRegion(100, 100, 100, 100);
 932
 933     dc.Clear();
 934
 935     if ( m_owner->m_textureBackground )
 936     {
 937         dc.SetPen(*wxMEDIUM_GREY_PEN);
 938         for ( int i = 0; i < 200; i++ )
 939             dc.DrawLine(0, i*10, i*10, 0);
 940     }
 941
 942     switch ( m_show )
 943     {
 944         case Show_Default:
 945             DrawDefault(dc);
 946             break;
 947
 948         case Show_Circles:
 949             DrawCircles(dc);
 950             break;
 951
 952         case Show_Regions:
 953             DrawRegions(dc);
 954             break;
 955
 956         case Show_Text:
 957             DrawText(dc);
 958             break;
 959
 960         case Show_Lines:
 961             DrawTestLines( 0, 100, 0, dc );
 962             DrawTestLines( 0, 320, 1, dc );
 963             DrawTestLines( 0, 540, 2, dc );
 964             DrawTestLines( 0, 760, 6, dc );
 965             break;
 966
 967         case Show_Brushes:
 968             DrawTestBrushes(dc);
 969             break;
 970
 971         case Show_Polygons:
 972             DrawTestPoly(dc);
 973             break;
 974
 975         case Show_Mask:
 976             DrawImages(dc);
 977             break;
 978
 979         case Show_Ops:
 980             DrawWithLogicalOps(dc);
 981             break;
 982     }
 983 }
 984
 985 void MyCanvas::OnMouseMove(wxMouseEvent &event)
 986 {
 987     wxClientDC dc(this);
 988     PrepareDC(dc);
 989     m_owner->PrepareDC(dc);
 990
 991     wxPoint pos = event.GetPosition();
 992     long x = dc.DeviceToLogicalX( pos.x );
 993     long y = dc.DeviceToLogicalY( pos.y );
 994     wxString str;
 995     str.Printf( wxT("Current mouse position: %d,%d"), (int)x, (int)y );
 996     m_owner->SetStatusText( str );
 997 }
 998
 999 // ----------------------------------------------------------------------------
1000 // MyFrame
1001 // ----------------------------------------------------------------------------
1002
1003 // the event tables connect the wxWindows events with the functions (event
1004 // handlers) which process them. It can be also done at run-time, but for the
1005 // simple menu events like this the static method is much simpler.
1006 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
1007     EVT_MENU      (File_Quit,     MyFrame::OnQuit)
1008     EVT_MENU      (File_About,    MyFrame::OnAbout)
1009     EVT_MENU      (File_Clip,     MyFrame::OnClip)
1010
1011     EVT_MENU_RANGE(MenuShow_First,   MenuShow_Last,   MyFrame::OnShow)
1012
1013     EVT_MENU_RANGE(MenuOption_First, MenuOption_Last, MyFrame::OnOption)
1014 END_EVENT_TABLE()
1015
1016 // frame constructor
1017 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
1018        : wxFrame((wxFrame *)NULL, -1, title, pos, size,
1019                  wxDEFAULT_FRAME_STYLE | wxNO_FULL_REPAINT_ON_RESIZE)
1020 {
1021     // set the frame icon
1022     SetIcon(wxICON(mondrian));
1023
1024     wxMenu *menuFile = new wxMenu;
1025     menuFile->Append(File_ShowDefault, _T("&Default screen\tF1"));
1026     menuFile->Append(File_ShowText, _T("&Text screen\tF2"));
1027     menuFile->Append(File_ShowLines, _T("&Lines screen\tF3"));
1028     menuFile->Append(File_ShowBrushes, _T("&Brushes screen\tF4"));
1029     menuFile->Append(File_ShowPolygons, _T("&Polygons screen\tF5"));
1030     menuFile->Append(File_ShowMask, _T("&Mask screen\tF6"));
1031     menuFile->Append(File_ShowOps, _T("&ROP screen\tF7"));
1032     menuFile->Append(File_ShowRegions, _T("Re&gions screen\tF8"));
1033     menuFile->Append(File_ShowCircles, _T("&Circles screen\tF9"));
1034     menuFile->AppendSeparator();
1035     menuFile->AppendCheckItem(File_Clip, _T("&Clip\tCtrl-C"), _T("Clip/unclip drawing"));
1036     menuFile->AppendSeparator();
1037     menuFile->Append(File_About, _T("&About...\tCtrl-A"), _T("Show about dialog"));
1038     menuFile->AppendSeparator();
1039     menuFile->Append(File_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
1040
1041     wxMenu *menuMapMode = new wxMenu;
1042     menuMapMode->Append( MapMode_Text, _T("&TEXT map mode") );
1043     menuMapMode->Append( MapMode_Lometric, _T("&LOMETRIC map mode") );
1044     menuMapMode->Append( MapMode_Twips, _T("T&WIPS map mode") );
1045     menuMapMode->Append( MapMode_Points, _T("&POINTS map mode") );
1046     menuMapMode->Append( MapMode_Metric, _T("&METRIC map mode") );
1047
1048     wxMenu *menuUserScale = new wxMenu;
1049     menuUserScale->Append( UserScale_StretchHoriz, _T("Stretch &horizontally\tCtrl-H") );
1050     menuUserScale->Append( UserScale_ShrinkHoriz, _T("Shrin&k horizontally\tCtrl-G") );
1051     menuUserScale->Append( UserScale_StretchVertic, _T("Stretch &vertically\tCtrl-V") );
1052     menuUserScale->Append( UserScale_ShrinkVertic, _T("&Shrink vertically\tCtrl-W") );
1053     menuUserScale->AppendSeparator();
1054     menuUserScale->Append( UserScale_Restore, _T("&Restore to normal\tCtrl-0") );
1055
1056     wxMenu *menuAxis = new wxMenu;
1057     menuAxis->Append( AxisMirror_Horiz, _T("Mirror horizontally\tCtrl-M"), _T(""), TRUE );
1058     menuAxis->Append( AxisMirror_Vertic, _T("Mirror vertically\tCtrl-N"), _T(""), TRUE );
1059
1060     wxMenu *menuLogical = new wxMenu;
1061     menuLogical->Append( LogicalOrigin_MoveDown, _T("Move &down\tCtrl-D") );
1062     menuLogical->Append( LogicalOrigin_MoveUp, _T("Move &up\tCtrl-U") );
1063     menuLogical->Append( LogicalOrigin_MoveLeft, _T("Move &right\tCtrl-L") );
1064     menuLogical->Append( LogicalOrigin_MoveRight, _T("Move &left\tCtrl-R") );
1065     menuLogical->AppendSeparator();
1066     menuLogical->Append( LogicalOrigin_Set, _T("Set to (&100, 100)\tShift-Ctrl-1") );
1067     menuLogical->Append( LogicalOrigin_Restore, _T("&Restore to normal\tShift-Ctrl-0") );
1068
1069     wxMenu *menuColour = new wxMenu;
1070     menuColour->Append( Colour_TextForeground, _T("Text &foreground...") );
1071     menuColour->Append( Colour_TextBackground, _T("Text &background...") );
1072     menuColour->Append( Colour_Background, _T("Background &colour...") );
1073     menuColour->Append( Colour_BackgroundMode, _T("&Opaque/transparent\tCtrl-B"), _T(""), TRUE );
1074     menuColour->Append( Colour_TextureBackgound, _T("Draw textured back&ground\tCtrl-T"), _T(""), TRUE);
1075
1076     // now append the freshly created menu to the menu bar...
1077     wxMenuBar *menuBar = new wxMenuBar;
1078     menuBar->Append(menuFile, _T("&File"));
1079     menuBar->Append(menuMapMode, _T("&Mode"));
1080     menuBar->Append(menuUserScale, _T("&Scale"));
1081     menuBar->Append(menuAxis, _T("&Axis"));
1082     menuBar->Append(menuLogical, _T("&Origin"));
1083     menuBar->Append(menuColour, _T("&Colours"));
1084
1085     // ... and attach this menu bar to the frame
1086     SetMenuBar(menuBar);
1087
1088     // create a status bar just for fun (by default with 1 pane only)
1089     CreateStatusBar(2);
1090     SetStatusText(_T("Welcome to wxWindows!"));
1091
1092     m_mapMode = wxMM_TEXT;
1093     m_xUserScale = 1.0;
1094     m_yUserScale = 1.0;
1095     m_xLogicalOrigin = 0;
1096     m_yLogicalOrigin = 0;
1097     m_xAxisReversed =
1098     m_yAxisReversed = FALSE;
1099     m_backgroundMode = wxSOLID;
1100     m_colourForeground = *wxRED;
1101     m_colourBackground = *wxBLUE;
1102     m_textureBackground = FALSE;
1103
1104     m_canvas = new MyCanvas( this );
1105     m_canvas->SetScrollbars( 10, 10, 100, 240 );
1106 }
1107
1108 // event handlers
1109
1110 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
1111 {
1112     // TRUE is to force the frame to close
1113     Close(TRUE);
1114 }
1115
1116 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
1117 {
1118     wxString msg;
1119     msg.Printf( wxT("This is the about dialog of the drawing sample.\n")
1120                 wxT("This sample tests various primitive drawing functions\n")
1121                 wxT("(without any attempts to prevent flicker).\n")
1122                 wxT("Copyright (c) Robert Roebling 1999")
1123               );
1124
1125     wxMessageBox(msg, _T("About Drawing"), wxOK | wxICON_INFORMATION, this);
1126 }
1127
1128 void MyFrame::OnClip(wxCommandEvent& event)
1129 {
1130     m_canvas->Clip(event.IsChecked());
1131 }
1132
1133 void MyFrame::OnShow(wxCommandEvent& event)
1134 {
1135     m_canvas->Show((ScreenToShow)(event.GetId() - MenuShow_First));
1136 }
1137
1138 void MyFrame::OnOption(wxCommandEvent& event)
1139 {
1140     switch (event.GetId())
1141     {
1142         case MapMode_Text:
1143             m_mapMode = wxMM_TEXT;
1144             break;
1145         case MapMode_Lometric:
1146             m_mapMode = wxMM_LOMETRIC;
1147             break;
1148         case MapMode_Twips:
1149             m_mapMode = wxMM_TWIPS;
1150             break;
1151         case MapMode_Points:
1152             m_mapMode = wxMM_POINTS;
1153             break;
1154         case MapMode_Metric:
1155             m_mapMode = wxMM_METRIC;
1156             break;
1157
1158         case LogicalOrigin_MoveDown:
1159             m_yLogicalOrigin += 10;
1160             break;
1161         case LogicalOrigin_MoveUp:
1162             m_yLogicalOrigin -= 10;
1163             break;
1164         case LogicalOrigin_MoveLeft:
1165             m_xLogicalOrigin += 10;
1166             break;
1167         case LogicalOrigin_MoveRight:
1168             m_xLogicalOrigin -= 10;
1169             break;
1170         case LogicalOrigin_Set:
1171             m_xLogicalOrigin =
1172             m_yLogicalOrigin = -100;
1173             break;
1174         case LogicalOrigin_Restore:
1175             m_xLogicalOrigin =
1176             m_yLogicalOrigin = 0;
1177             break;
1178
1179         case UserScale_StretchHoriz:
1180             m_xUserScale *= 1.10;
1181             break;
1182         case UserScale_ShrinkHoriz:
1183             m_xUserScale /= 1.10;
1184             break;
1185         case UserScale_StretchVertic:
1186             m_yUserScale *= 1.10;
1187             break;
1188         case UserScale_ShrinkVertic:
1189             m_yUserScale /= 1.10;
1190             break;
1191         case UserScale_Restore:
1192             m_xUserScale =
1193             m_yUserScale = 1.0;
1194             break;
1195
1196         case AxisMirror_Vertic:
1197             m_yAxisReversed = !m_yAxisReversed;
1198             break;
1199         case AxisMirror_Horiz:
1200             m_xAxisReversed = !m_xAxisReversed;
1201             break;
1202
1203         case Colour_TextForeground:
1204             m_colourForeground = SelectColour();
1205             break;
1206         case Colour_TextBackground:
1207             m_colourBackground = SelectColour();
1208             break;
1209         case Colour_Background:
1210             {
1211                 wxColour col = SelectColour();
1212                 if ( col.Ok() )
1213                 {
1214                     m_backgroundBrush.SetColour(col);
1215                 }
1216             }
1217             break;
1218         case Colour_BackgroundMode:
1219             m_backgroundMode = m_backgroundMode == wxSOLID ? wxTRANSPARENT
1220                                                            : wxSOLID;
1221             break;
1222
1223         case Colour_TextureBackgound:
1224             m_textureBackground = ! m_textureBackground;
1225             break;
1226
1227         default:
1228             // skip Refresh()
1229             return;
1230     }
1231
1232     m_canvas->Refresh();
1233 }
1234
1235 void MyFrame::PrepareDC(wxDC& dc)
1236 {
1237     dc.SetLogicalOrigin( m_xLogicalOrigin, m_yLogicalOrigin );
1238     dc.SetAxisOrientation( !m_xAxisReversed, m_yAxisReversed );
1239     dc.SetUserScale( m_xUserScale, m_yUserScale );
1240     dc.SetMapMode( m_mapMode );
1241 }
1242
1243 wxColour MyFrame::SelectColour()
1244 {
1245     wxColour col;
1246     wxColourData data;
1247     wxColourDialog dialog(this, &data);
1248
1249     if ( dialog.ShowModal() == wxID_OK )
1250     {
1251         col = dialog.GetColourData().GetColour();
1252     }
1253
1254     return col;
1255 }