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 #ifdef __GNUG__
  20     #pragma implementation "drawing.cpp"
  21     #pragma interface "drawing.cpp"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx/wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 // for all others, include the necessary headers (this file is usually all you
  32 // need because it includes almost all "standard" wxWindows headers
  33 #ifndef WX_PRECOMP
  34     #include "wx/wx.h"
  35 #endif
  36
  37 #include "wx/colordlg.h"
  38
  39 // ----------------------------------------------------------------------------
  40 // ressources
  41 // ----------------------------------------------------------------------------
  42 // the application icon
  43 #if defined(__WXGTK__) || defined(__WXMOTIF__)
  44     #include "mondrian.xpm"
  45 #endif
  46
  47 // ----------------------------------------------------------------------------
  48 // private classes
  49 // ----------------------------------------------------------------------------
  50
  51 // Define a new application type, each program should derive a class from wxApp
  52 class MyApp : public wxApp
  53 {
  54 public:
  55     // override base class virtuals
  56     // ----------------------------
  57
  58     // this one is called on application startup and is a good place for the app
  59     // initialization (doing it here and not in the ctor allows to have an error
  60     // return: if OnInit() returns false, the application terminates)
  61     virtual bool OnInit();
  62 };
  63
  64 class MyCanvas;
  65
  66 // Define a new frame type: this is going to be our main frame
  67 class MyFrame : public wxFrame
  68 {
  69 public:
  70     // ctor(s)
  71     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  72
  73     // event handlers (these functions should _not_ be virtual)
  74     void OnQuit(wxCommandEvent& event);
  75     void OnAbout(wxCommandEvent& event);
  76     void OnOption(wxCommandEvent &event);
  77
  78     wxColour SelectColour();
  79     void PrepareDC(wxDC& dc);
  80
  81     int         m_backgroundMode;
  82     int         m_mapMode;
  83     double      m_xUserScale;
  84     double      m_yUserScale;
  85     int         m_xLogicalOrigin;
  86     int         m_yLogicalOrigin;
  87     bool        m_xAxisReversed,
  88                 m_yAxisReversed;
  89     wxColour    m_colourForeground,    // these are _text_ colours
  90                 m_colourBackground;
  91     wxBrush     m_backgroundBrush;
  92     MyCanvas   *m_canvas;
  93
  94 private:
  95     // any class wishing to process wxWindows events must use this macro
  96     DECLARE_EVENT_TABLE()
  97 };
  98
  99 // define a scrollable canvas for drawing onto
 100 class MyCanvas: public wxScrolledWindow
 101 {
 102 public:
 103     MyCanvas( MyFrame *parent );
 104
 105     void DrawTestPoly( int x, int y, wxDC &dc ,int transparent );
 106     void DrawTestLines( int x, int y, int width, wxDC &dc );
 107     void OnPaint(wxPaintEvent &event);
 108     void OnMouseMove(wxMouseEvent &event);
 109
 110 protected:
 111     MyFrame *m_owner;
 112
 113 private:
 114     DECLARE_EVENT_TABLE()
 115 };
 116
 117 // ----------------------------------------------------------------------------
 118 // constants
 119 // ----------------------------------------------------------------------------
 120
 121 // IDs for the controls and the menu commands
 122 enum
 123 {
 124     // menu items
 125     Minimal_Quit = 1,
 126     Minimal_About,
 127
 128     MenuOption_First,
 129
 130     MapMode_Text = MenuOption_First,
 131     MapMode_Lometric,
 132     MapMode_Twips,
 133     MapMode_Points,
 134     MapMode_Metric,
 135
 136     UserScale_StretchHoriz,
 137     UserScale_ShrinkHoriz,
 138     UserScale_StretchVertic,
 139     UserScale_ShrinkVertic,
 140     UserScale_Restore,
 141
 142     AxisMirror_Horiz,
 143     AxisMirror_Vertic,
 144
 145     LogicalOrigin_MoveDown,
 146     LogicalOrigin_MoveUp,
 147     LogicalOrigin_MoveLeft,
 148     LogicalOrigin_MoveRight,
 149
 150     Colour_TextForeground,
 151     Colour_TextBackground,
 152     Colour_Background,
 153     Colour_BackgroundMode,
 154
 155     MenuOption_Last = Colour_BackgroundMode
 156 };
 157
 158 // ----------------------------------------------------------------------------
 159 // event tables and other macros for wxWindows
 160 // ----------------------------------------------------------------------------
 161
 162
 163 // Create a new application object: this macro will allow wxWindows to create
 164 // the application object during program execution (it's better than using a
 165 // static object for many reasons) and also declares the accessor function
 166 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 167 // not wxApp)
 168 IMPLEMENT_APP(MyApp)
 169
 170 // ============================================================================
 171 // implementation
 172 // ============================================================================
 173
 174 // ----------------------------------------------------------------------------
 175 // the application class
 176 // ----------------------------------------------------------------------------
 177
 178 // `Main program' equivalent: the program execution "starts" here
 179 bool MyApp::OnInit()
 180 {
 181     // Create the main application window
 182     MyFrame *frame = new MyFrame("Drawing sample",
 183                                  wxPoint(50, 50), wxSize(550, 340));
 184
 185     // Show it and tell the application that it's our main window
 186     frame->Show(TRUE);
 187     SetTopWindow(frame);
 188
 189     // success: wxApp::OnRun() will be called which will enter the main message
 190     // loop and the application will run. If we returned FALSE here, the
 191     // application would exit immediately.
 192     return TRUE;
 193 }
 194
 195 // ----------------------------------------------------------------------------
 196 // MyCanvas
 197 // ----------------------------------------------------------------------------
 198
 199 // the event tables connect the wxWindows events with the functions (event
 200 // handlers) which process them.
 201 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 202     EVT_PAINT  (MyCanvas::OnPaint)
 203     EVT_MOTION (MyCanvas::OnMouseMove)
 204 END_EVENT_TABLE()
 205
 206 MyCanvas::MyCanvas( MyFrame *parent ) : wxScrolledWindow( parent )
 207 {
 208     m_owner = parent;
 209 }
 210
 211 //draw a polygon and an overlapping rectangle
 212 //is transparent is 1, the fill pattern are made transparent
 213 //is transparent is 2, the fill pattern are made transparent but inversed
 214 //is transparent is 0 the text for and background color will be used to represent/map
 215 //the colors of the monochrome bitmap pixels to the fillpattern
 216 //
 217 //i miss_used the the menu items for setting so called back and fore ground color
 218 //just to show how the those colors do influence the fillpatterns
 219 //just play with those,
 220 //and with the code
 221 //variations are endless using other logical functions
 222 void MyCanvas::DrawTestPoly( int x, int y,wxDC &dc,int transparent )
 223 {
 224     char pathfile[80];
 225
 226 #ifdef __WXMSW__
 227     //this if run from ide project file
 228     sprintf(pathfile,"./drawing/pat%i.bmp",4);
 229     wxBitmap* nonMonoBitmap4 = new wxBitmap(32,32,-1);
 230     nonMonoBitmap4->LoadFile(pathfile,wxBITMAP_TYPE_BMP);
 231
 232     sprintf(pathfile,"./drawing/pat%i.bmp",36);
 233     wxBitmap* nonMonoBitmap36 = new wxBitmap(32,32,-1);
 234     nonMonoBitmap36->LoadFile(pathfile,wxBITMAP_TYPE_BMP);
 235 #else
 236     sprintf(pathfile,"./pat%i.bmp",4);
 237     wxBitmap* nonMonoBitmap4 = new wxBitmap(32,32,-1);
 238     nonMonoBitmap4->LoadFile(pathfile,wxBITMAP_TYPE_BMP);
 239
 240     sprintf(pathfile,"./pat%i.bmp",36);
 241     wxBitmap* nonMonoBitmap36 = new wxBitmap(32,32,-1);
 242     nonMonoBitmap36->LoadFile(pathfile,wxBITMAP_TYPE_BMP);
 243 #endif
 244
 245     if ( !nonMonoBitmap4->Ok() || !nonMonoBitmap36->Ok() )
 246     {
 247         static bool s_errorGiven = FALSE;
 248
 249         if ( !s_errorGiven )
 250         {
 251             wxLogError("Couldn't find bitmap files near the program file, "
 252                        "please copy them there.");
 253
 254             s_errorGiven = TRUE;
 255         }
 256     }
 257
 258     //set mask to monochrome bitmap based on color bitmap
 259     wxColour white("WHITE");
 260     wxPen _Pen = wxPen(white,1,wxSOLID);
 261     wxColour black("BLACK");
 262
 263     wxMask* monochrome_mask4 = new wxMask(*nonMonoBitmap4,black);
 264     nonMonoBitmap4->SetMask(monochrome_mask4);
 265
 266     wxMask* monochrome_mask36 = new wxMask(*nonMonoBitmap36,black);
 267     nonMonoBitmap36->SetMask(monochrome_mask36);
 268
 269     wxBrush* _brush4  = new wxBrush(*nonMonoBitmap4);
 270     wxBrush* _brush36 = new wxBrush(*nonMonoBitmap36);
 271
 272     wxPoint todraw[5];
 273     todraw[0].x=(long)x+100;
 274     todraw[0].y=(long)y+100;
 275     todraw[1].x=(long)x+300;
 276     todraw[1].y=(long)y+100;
 277     todraw[2].x=(long)x+300;
 278     todraw[2].y=(long)y+300;
 279     todraw[3].x=(long)x+150;
 280     todraw[3].y=(long)y+350;
 281     todraw[4].x=(long)x+100;
 282     todraw[4].y=(long)y+300;
 283
 284     wxPoint todraw2[5];
 285     todraw2[0].x=100;
 286     todraw2[0].y=100;
 287     todraw2[1].x=300;
 288     todraw2[1].y=100;
 289     todraw2[2].x=300;
 290     todraw2[2].y=300;
 291     todraw2[3].x=150;
 292     todraw2[3].y=350;
 293     todraw2[4].x=100;
 294     todraw2[4].y=300;
 295
 296     switch (transparent)
 297     {
 298         case 0:
 299             {
 300                 dc.SetPen( wxPen( "black", 4, wxSOLID) );
 301                 dc.SetBrush( *_brush4 );
 302                 dc.SetTextForeground(*wxGREEN);
 303                 //       dc.SetTextBackground(*wxBLUE);
 304                 dc.SetTextBackground(m_owner->m_colourForeground);
 305                 dc.SetLogicalFunction(wxCOPY);
 306                 dc.DrawPolygon(5,todraw,0,0,wxWINDING_RULE);
 307
 308                 //don't understand hwo but the outline is also depending on logicalfunction
 309                 dc.SetPen( wxPen( "red", 4, wxSOLID) );
 310                 dc.SetBrush( *_brush36 );
 311                 dc.SetTextForeground(*wxCYAN);
 312                 //       dc.SetTextBackground(*wxRED);
 313                 dc.SetTextBackground(m_owner->m_colourBackground);
 314                 dc.SetLogicalFunction(wxCOPY);
 315                 dc.DrawRectangle( x+10, y+10, 200, 200 );
 316                 dc.SetBrush(wxNullBrush);
 317                 dc.SetPen(wxNullPen);
 318                 break;
 319             }
 320         case 1:  //now with transparent fillpatterns
 321             {
 322
 323                 wxBitmap* _blitbitmap = new wxBitmap(600,400);
 324                 wxMemoryDC* _memDC= new wxMemoryDC();
 325                 //      wxBrush _clearbrush(*wxGREEN,wxSOLID);
 326                 wxBrush _clearbrush(*wxBLACK,wxSOLID);
 327                 _memDC->SelectObject(*_blitbitmap);
 328                 _memDC->BeginDrawing();
 329                 _memDC->SetBackground(_clearbrush);
 330                 _memDC->Clear();
 331                 _memDC->SetBackground(wxNullBrush);
 332
 333                 _memDC->SetPen( wxPen( "black", 4, wxSOLID) );
 334                 _memDC->SetBrush( wxNullBrush);
 335                 _memDC->SetBrush( *_brush4 );
 336                 _memDC->SetTextForeground(*wxBLACK);            // 0s --> 0x000000 (black)
 337                 _memDC->SetTextBackground(*wxWHITE);    // 1s --> 0xFFFFFF (white)
 338                 _memDC->SetLogicalFunction(wxAND_INVERT);
 339
 340                 // BLACK OUT the opaque pixels and leave the rest as is
 341                 _memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
 342
 343                 // Set background and foreground colors for fill pattern
 344                 //the previous blacked out pixels are now merged with the layer color
 345                 //while the non blacked out pixels stay as they are.
 346                 _memDC->SetTextForeground(*wxBLACK);            // 0s --> 0x000000 (black)
 347
 348                 //now define what will be the color of the fillpattern parts that are not transparent
 349                 //      _memDC->SetTextBackground(*wxBLUE);
 350                 _memDC->SetTextBackground(m_owner->m_colourForeground);
 351                 _memDC->SetLogicalFunction(wxOR);
 352
 353
 354                 //don't understand how but the outline is also depending on logicalfunction
 355                 _memDC->SetPen( wxPen( "red", 4, wxSOLID) );
 356                 _memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
 357
 358                 _memDC->SetLogicalFunction(wxCOPY);
 359
 360                 _memDC->SetPen( wxPen( "black", 4, wxSOLID) );
 361                 _memDC->SetBrush( wxNullBrush);
 362                 _memDC->SetBrush( *_brush36 );
 363                 _memDC->SetTextForeground(*wxBLACK);            // 0s --> 0x000000 (black)
 364                 _memDC->SetTextBackground(*wxWHITE);    // 1s --> 0xFFFFFF (white)
 365                 _memDC->SetLogicalFunction(wxAND_INVERT);
 366
 367                 _memDC->DrawRectangle( 10, 10, 200, 200 );
 368
 369                 // Set background and foreground colors for fill pattern
 370                 //the previous blacked out pixels are now merged with the layer color
 371                 //while the non blacked out pixels stay as they are.
 372                 _memDC->SetTextForeground(*wxBLACK);            // 0s --> 0x000000 (black)
 373                 //now define what will be the color of the fillpattern parts that are not transparent
 374                 //      _memDC->SetTextBackground(*wxRED);
 375                 _memDC->SetTextBackground(m_owner->m_colourBackground);
 376                 _memDC->SetLogicalFunction(wxOR);
 377
 378                 //don't understand how but the outline is also depending on logicalfunction
 379                 _memDC->SetPen( wxPen( "yellow", 4, wxSOLID) );
 380                 _memDC->DrawRectangle( 10, 10, 200, 200 );
 381
 382                 _memDC->SetBrush(wxNullBrush);
 383                 _memDC->SetPen(wxNullPen);
 384
 385                 _memDC->EndDrawing();
 386                 dc.Blit(x,y,600,400,_memDC,0,0,wxCOPY);
 387                 delete _blitbitmap;
 388                 delete _memDC;
 389                 break;
 390             }
 391         case 2:  //now with transparent inversed fillpatterns
 392             {
 393                 wxBitmap* _blitbitmap = new wxBitmap(600,400);
 394                 wxMemoryDC* _memDC= new wxMemoryDC();
 395                 wxBrush _clearbrush(*wxWHITE,wxSOLID);
 396                 _memDC->SelectObject(*_blitbitmap);
 397                 _memDC->BeginDrawing();
 398                 _memDC->SetBackground(_clearbrush);
 399                 _memDC->Clear();
 400                 _memDC->SetBackground(wxNullBrush);
 401
 402                 _memDC->SetPen( wxPen( "black", 4, wxSOLID) );
 403                 _memDC->SetBrush( *_brush4 );
 404                 _memDC->SetTextBackground(*wxBLACK);            // 0s --> 0x000000 (black)
 405                 _memDC->SetTextForeground(*wxWHITE);    // 1s --> 0xFFFFFF (white)
 406                 _memDC->SetLogicalFunction(wxAND_INVERT);
 407
 408                 // BLACK OUT the opaque pixels and leave the rest as is
 409                 _memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
 410
 411                 // Set background and foreground colors for fill pattern
 412                 //the previous blacked out pixels are now merged with the layer color
 413                 //while the non blacked out pixels stay as they are.
 414                 _memDC->SetTextBackground(*wxBLACK);            // 0s --> 0x000000 (black)
 415
 416                 //now define what will be the color of the fillpattern parts that are not transparent
 417                 _memDC->SetTextForeground(m_owner->m_colourForeground);
 418                 _memDC->SetLogicalFunction(wxOR);
 419
 420
 421                 //don't understand how but the outline is also depending on logicalfunction
 422                 _memDC->SetPen( wxPen( "red", 4, wxSOLID) );
 423                 _memDC->DrawPolygon(5,todraw2,0,0,wxWINDING_RULE);
 424
 425                 _memDC->SetLogicalFunction(wxCOPY);
 426
 427                 _memDC->SetPen( wxPen( "black", 4, wxSOLID) );
 428                 _memDC->SetBrush( *_brush36 );
 429                 _memDC->SetTextBackground(*wxBLACK);            // 0s --> 0x000000 (black)
 430                 _memDC->SetTextForeground(*wxWHITE);    // 1s --> 0xFFFFFF (white)
 431                 _memDC->SetLogicalFunction(wxAND_INVERT);
 432
 433                 _memDC->DrawRectangle( 10,10, 200, 200 );
 434
 435                 // Set background and foreground colors for fill pattern
 436                 //the previous blacked out pixels are now merged with the layer color
 437                 //while the non blacked out pixels stay as they are.
 438                 _memDC->SetTextBackground(*wxBLACK);            // 0s --> 0x000000 (black)
 439                 //now define what will be the color of the fillpattern parts that are not transparent
 440                 _memDC->SetTextForeground(m_owner->m_colourBackground);
 441                 _memDC->SetLogicalFunction(wxOR);
 442
 443                 //don't understand how but the outline is also depending on logicalfunction
 444                 _memDC->SetPen( wxPen( "yellow", 4, wxSOLID) );
 445                 _memDC->DrawRectangle( 10, 10, 200, 200 );
 446
 447                 _memDC->SetBrush(wxNullBrush);
 448                 _memDC->SetPen(wxNullPen);
 449                 dc.Blit(x,y,600,400,_memDC,0,0,wxCOPY);
 450                 delete _blitbitmap;
 451                 delete _memDC;
 452             }
 453     }
 454
 455     delete _brush4;
 456     delete _brush36;
 457 }
 458
 459 void MyCanvas::DrawTestLines( int x, int y, int width, wxDC &dc )
 460 {
 461     dc.SetPen( wxPen( "black", width, wxSOLID) );
 462     dc.SetBrush( *wxRED_BRUSH );
 463     dc.DrawRectangle( x+10, y+10, 100, 190 );
 464
 465     dc.SetPen( wxPen( "black", width, wxSOLID) );
 466     dc.DrawLine( x+20, y+20, 100, y+20 );
 467     dc.SetPen( wxPen( "black", width, wxDOT) );
 468     dc.DrawLine( x+20, y+30, 100, y+30 );
 469     dc.SetPen( wxPen( "black", width, wxSHORT_DASH) );
 470     dc.DrawLine( x+20, y+40, 100, y+40 );
 471     dc.SetPen( wxPen( "black", width, wxLONG_DASH) );
 472     dc.DrawLine( x+20, y+50, 100, y+50 );
 473     dc.SetPen( wxPen( "black", width, wxDOT_DASH) );
 474     dc.DrawLine( x+20, y+60, 100, y+60 );
 475
 476     dc.SetPen( wxPen( "black", width, wxBDIAGONAL_HATCH) );
 477     dc.DrawLine( x+20, y+70, 100, y+70 );
 478     dc.SetPen( wxPen( "black", width, wxCROSSDIAG_HATCH) );
 479     dc.DrawLine( x+20, y+80, 100, y+80 );
 480     dc.SetPen( wxPen( "black", width, wxFDIAGONAL_HATCH) );
 481     dc.DrawLine( x+20, y+90, 100, y+90 );
 482     dc.SetPen( wxPen( "black", width, wxCROSS_HATCH) );
 483     dc.DrawLine( x+20, y+100, 100, y+100 );
 484     dc.SetPen( wxPen( "black", width, wxHORIZONTAL_HATCH) );
 485     dc.DrawLine( x+20, y+110, 100, y+110 );
 486     dc.SetPen( wxPen( "black", width, wxVERTICAL_HATCH) );
 487     dc.DrawLine( x+20, y+120, 100, y+120 );
 488
 489     wxPen ud( "black", width, wxUSER_DASH );
 490     wxDash dash1[1];
 491     dash1[0] = 0;
 492     ud.SetDashes( 1, dash1 );
 493     dc.DrawLine( x+20, y+140, 100, y+140 );
 494     dash1[0] = 1;
 495     ud.SetDashes( 1, dash1 );
 496     dc.DrawLine( x+20, y+150, 100, y+150 );
 497     dash1[0] = 2;
 498     ud.SetDashes( 1, dash1 );
 499     dc.DrawLine( x+20, y+160, 100, y+160 );
 500     dash1[0] = 0xFF;
 501     ud.SetDashes( 1, dash1 );
 502     dc.DrawLine( x+20, y+170, 100, y+170 );
 503
 504 }
 505
 506 void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event))
 507 {
 508     wxPaintDC dc(this);
 509     PrepareDC(dc);
 510     m_owner->PrepareDC(dc);
 511
 512     dc.SetBackgroundMode( m_owner->m_backgroundMode );
 513     if ( m_owner->m_backgroundBrush.Ok() )
 514         dc.SetBackground( m_owner->m_backgroundBrush );
 515     if ( m_owner->m_colourForeground.Ok() )
 516         dc.SetTextForeground( m_owner->m_colourForeground );
 517     if ( m_owner->m_colourBackground.Ok() )
 518         dc.SetTextBackground( m_owner->m_colourBackground );
 519
 520     // mark the origin
 521     dc.DrawCircle(0, 0, 10);
 522 #if !(defined __WXGTK__) && !(defined __WXMOTIF__)
 523     // not implemented in wxGTK or wxMOTIF :-(
 524     dc.FloodFill(0, 0, wxColour(255, 0, 0));
 525 #endif //
 526
 527     // set underlined font for testing
 528     dc.SetFont( wxFont(12, wxMODERN, wxNORMAL, wxNORMAL, TRUE) );
 529     dc.DrawText( "This is text", 110, 10 );
 530     dc.DrawRotatedText( "That is text", 60, 30, -45 );
 531
 532     dc.SetFont( *wxNORMAL_FONT );
 533
 534     wxString text;
 535     dc. SetBackgroundMode(wxTRANSPARENT);
 536
 537     for ( int n = -180; n < 180; n += 30 )
 538     {
 539         text.Printf("     %d rotated text", n);
 540         dc.DrawRotatedText(text , 400, 400, n);
 541     }
 542
 543     dc.SetFont( wxFont( 18, wxSWISS, wxNORMAL, wxNORMAL ) );
 544
 545     dc.DrawText( "This is Swiss 18pt text.", 110, 40 );
 546
 547     long length;
 548     long height;
 549     long descent;
 550     dc.GetTextExtent( "This is Swiss 18pt text.", &length, &height, &descent );
 551     text.Printf( "Dimensions are length %ld, height %ld, descent %ld", length, height, descent );
 552     dc.DrawText( text, 110, 80 );
 553
 554     dc.DrawRectangle( 100, 40, 4, height );
 555
 556     text.Printf( "CharHeight() returns: %d", dc.GetCharHeight() );
 557     dc.DrawText( text, 110, 120 );
 558
 559
 560     dc.DrawIcon( wxICON(mondrian), 310, 40 );
 561
 562     DrawTestLines( 0, 200, 0, dc );
 563
 564     DrawTestLines( 0, 400, 1, dc );
 565
 566     DrawTestLines( 0, 600, 2, dc );
 567
 568     DrawTestLines( 0, 800, 6, dc );
 569
 570     DrawTestPoly( 0, 1000, dc ,0);
 571     DrawTestPoly( 33, 1400, dc ,1);
 572     DrawTestPoly( 43, 1900, dc ,2);
 573 }
 574
 575 void MyCanvas::OnMouseMove(wxMouseEvent &event)
 576 {
 577     wxClientDC dc(this);
 578     PrepareDC(dc);
 579     m_owner->PrepareDC(dc);
 580
 581     wxPoint pos = event.GetPosition();
 582     long x = dc.DeviceToLogicalX( pos.x );
 583     long y = dc.DeviceToLogicalY( pos.y );
 584     wxString str;
 585     str.Printf( "Current mouse position: %d,%d", (int)x, (int)y );
 586     m_owner->SetStatusText( str );
 587 }
 588
 589 // ----------------------------------------------------------------------------
 590 // MyFrame
 591 // ----------------------------------------------------------------------------
 592
 593 // the event tables connect the wxWindows events with the functions (event
 594 // handlers) which process them. It can be also done at run-time, but for the
 595 // simple menu events like this the static method is much simpler.
 596 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 597     EVT_MENU      (Minimal_Quit,     MyFrame::OnQuit)
 598     EVT_MENU      (Minimal_About,    MyFrame::OnAbout)
 599     EVT_MENU_RANGE(MenuOption_First, MenuOption_Last, MyFrame::OnOption)
 600 END_EVENT_TABLE()
 601
 602 // frame constructor
 603 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 604        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 605 {
 606     // set the frame icon
 607     SetIcon(wxICON(mondrian));
 608
 609     wxMenu *menuFile = new wxMenu;
 610     menuFile->Append(Minimal_About, "&About...\tCtrl-A", "Show about dialog");
 611     menuFile->AppendSeparator();
 612     menuFile->Append(Minimal_Quit, "E&xit\tAlt-X", "Quit this program");
 613
 614     wxMenu *menuMapMode = new wxMenu;
 615     menuMapMode->Append( MapMode_Text, "&TEXT map mode" );
 616     menuMapMode->Append( MapMode_Lometric, "&LOMETRIC map mode" );
 617     menuMapMode->Append( MapMode_Twips, "T&WIPS map mode" );
 618     menuMapMode->Append( MapMode_Points, "&POINTS map mode" );
 619     menuMapMode->Append( MapMode_Metric, "&METRIC map mode" );
 620
 621     wxMenu *menuUserScale = new wxMenu;
 622     menuUserScale->Append( UserScale_StretchHoriz, "Stretch horizontally\tCtrl-H" );
 623     menuUserScale->Append( UserScale_ShrinkHoriz, "Shrink  horizontally\tCtrl-G" );
 624     menuUserScale->Append( UserScale_StretchVertic, "Stretch vertically\tCtrl-V" );
 625     menuUserScale->Append( UserScale_ShrinkVertic, "Shrink vertically\tCtrl-W" );
 626     menuUserScale->AppendSeparator();
 627     menuUserScale->Append( UserScale_Restore, "Restore to normal\tCtrl-0" );
 628
 629     wxMenu *menuAxis = new wxMenu;
 630     menuAxis->Append( AxisMirror_Horiz, "Mirror horizontally\tCtrl-M", "", TRUE );
 631     menuAxis->Append( AxisMirror_Vertic, "Mirror vertically\tCtrl-N", "", TRUE );
 632
 633     wxMenu *menuLogical = new wxMenu;
 634     menuLogical->Append( LogicalOrigin_MoveDown, "Move &down\tCtrl-D" );
 635     menuLogical->Append( LogicalOrigin_MoveUp, "Move &up\tCtrl-U" );
 636     menuLogical->Append( LogicalOrigin_MoveLeft, "Move &right\tCtrl-L" );
 637     menuLogical->Append( LogicalOrigin_MoveRight, "Move &left\tCtrl-R" );
 638
 639     wxMenu *menuColour = new wxMenu;
 640     menuColour->Append( Colour_TextForeground, "Text foreground..." );
 641     menuColour->Append( Colour_TextBackground, "Text background..." );
 642     menuColour->Append( Colour_Background, "Background colour..." );
 643     menuColour->Append( Colour_BackgroundMode, "Opaque/transparent\tCtrl-B", "", TRUE );
 644
 645     // now append the freshly created menu to the menu bar...
 646     wxMenuBar *menuBar = new wxMenuBar;
 647     menuBar->Append(menuFile, "&File");
 648     menuBar->Append(menuMapMode, "&MapMode");
 649     menuBar->Append(menuUserScale, "&UserScale");
 650     menuBar->Append(menuAxis, "&Axis");
 651     menuBar->Append(menuLogical, "&LogicalOrigin");
 652     menuBar->Append(menuColour, "&Colours");
 653
 654     // ... and attach this menu bar to the frame
 655     SetMenuBar(menuBar);
 656
 657     // create a status bar just for fun (by default with 1 pane only)
 658     CreateStatusBar(2);
 659     SetStatusText("Welcome to wxWindows!");
 660
 661     m_mapMode = wxMM_TEXT;
 662     m_xUserScale = 1.0;
 663     m_yUserScale = 1.0;
 664     m_xLogicalOrigin = 0;
 665     m_yLogicalOrigin = 0;
 666     m_xAxisReversed =
 667     m_yAxisReversed = FALSE;
 668     m_backgroundMode = wxSOLID;
 669     m_colourForeground = *wxRED;
 670     m_colourBackground = *wxBLUE;
 671
 672     m_canvas = new MyCanvas( this );
 673     m_canvas->SetScrollbars( 10, 10, 100, 240 );
 674 }
 675
 676 // event handlers
 677
 678 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 679 {
 680     // TRUE is to force the frame to close
 681     Close(TRUE);
 682 }
 683
 684 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 685 {
 686     wxString msg;
 687     msg.Printf( _T("This is the about dialog of the drawing sample.\n")
 688                 _T("Copyright (c) Robert Roebling 1999")
 689               );
 690
 691     wxMessageBox(msg, "About Drawing", wxOK | wxICON_INFORMATION, this);
 692 }
 693
 694 void MyFrame::OnOption(wxCommandEvent &event)
 695 {
 696     switch (event.GetInt())
 697     {
 698         case MapMode_Text:
 699             m_mapMode = wxMM_TEXT;
 700             break;
 701         case MapMode_Lometric:
 702             m_mapMode = wxMM_LOMETRIC;
 703             break;
 704         case MapMode_Twips:
 705             m_mapMode = wxMM_TWIPS;
 706             break;
 707         case MapMode_Points:
 708             m_mapMode = wxMM_POINTS;
 709             break;
 710         case MapMode_Metric:
 711             m_mapMode = wxMM_METRIC;
 712             break;
 713
 714         case LogicalOrigin_MoveDown:
 715             m_yLogicalOrigin += 10;
 716             break;
 717         case LogicalOrigin_MoveUp:
 718             m_yLogicalOrigin -= 10;
 719             break;
 720         case LogicalOrigin_MoveLeft:
 721             m_xLogicalOrigin += 10;
 722             break;
 723         case LogicalOrigin_MoveRight:
 724             m_xLogicalOrigin -= 10;
 725             break;
 726
 727         case UserScale_StretchHoriz:
 728             m_xUserScale *= 1.10;
 729             break;
 730         case UserScale_ShrinkHoriz:
 731             m_xUserScale /= 1.10;
 732             break;
 733         case UserScale_StretchVertic:
 734             m_yUserScale *= 1.10;
 735             break;
 736         case UserScale_ShrinkVertic:
 737             m_yUserScale /= 1.10;
 738             break;
 739         case UserScale_Restore:
 740             m_xUserScale =
 741             m_yUserScale = 1.0;
 742             break;
 743
 744         case AxisMirror_Vertic:
 745             m_yAxisReversed = !m_yAxisReversed;
 746             break;
 747         case AxisMirror_Horiz:
 748             m_xAxisReversed = !m_xAxisReversed;
 749             break;
 750
 751         case Colour_TextForeground:
 752             m_colourForeground = SelectColour();
 753             break;
 754         case Colour_TextBackground:
 755             m_colourBackground = SelectColour();
 756             break;
 757         case Colour_Background:
 758             {
 759                 wxColour col = SelectColour();
 760                 if ( col.Ok() )
 761                 {
 762                     m_backgroundBrush.SetColour(col);
 763                 }
 764             }
 765             break;
 766         case Colour_BackgroundMode:
 767             m_backgroundMode = m_backgroundMode == wxSOLID ? wxTRANSPARENT
 768                                                            : wxSOLID;
 769             break;
 770
 771         default:
 772             // skip Refresh()
 773             return;
 774     }
 775
 776     m_canvas->Refresh();
 777 }
 778
 779 void MyFrame::PrepareDC(wxDC& dc)
 780 {
 781     dc.SetMapMode( m_mapMode );
 782     dc.SetUserScale( m_xUserScale, m_yUserScale );
 783     dc.SetLogicalOrigin( m_xLogicalOrigin, m_yLogicalOrigin );
 784     dc.SetAxisOrientation( !m_xAxisReversed, m_yAxisReversed );
 785 }
 786
 787 wxColour MyFrame::SelectColour()
 788 {
 789     wxColour col;
 790     wxColourData data;
 791     wxColourDialog dialog(this, &data);
 792
 793     if ( dialog.ShowModal() == wxID_OK )
 794     {
 795         col = dialog.GetColourData().GetColour();
 796     }
 797
 798     return col;
 799 }