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 // Define a new frame type: this is going to be our main frame
  65 class MyFrame : public wxFrame
  66 {
  67 public:
  68     // ctor(s)
  69     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  70
  71     // event handlers (these functions should _not_ be virtual)
  72     void OnQuit(wxCommandEvent& event);
  73     void OnAbout(wxCommandEvent& event);
  74     void OnPaint(wxPaintEvent &event);
  75     void OnOption(wxCommandEvent &event);
  76     void OnMouseMove(wxMouseEvent &event);
  77
  78     wxColour SelectColour();
  79     void PrepareDC(wxDC& dc);
  80
  81 protected:
  82     int      m_backgroundMode;
  83     int      m_mapMode;
  84     double   m_xUserScale;
  85     double   m_yUserScale;
  86     int      m_xLogicalOrigin;
  87     int      m_yLogicalOrigin;
  88     bool     m_xAxisReversed,
  89              m_yAxisReversed;
  90     wxColour m_colourForeground,    // these are _text_ colours
  91              m_colourBackground;
  92     wxBrush  m_backgroundBrush;
  93
  94 private:
  95     // any class wishing to process wxWindows events must use this macro
  96     DECLARE_EVENT_TABLE()
  97 };
  98
  99 // ----------------------------------------------------------------------------
 100 // constants
 101 // ----------------------------------------------------------------------------
 102
 103 // IDs for the controls and the menu commands
 104 enum
 105 {
 106     // menu items
 107     Minimal_Quit = 1,
 108     Minimal_About,
 109
 110     MenuOption_First,
 111
 112     MapMode_Text = MenuOption_First,
 113     MapMode_Lometric,
 114     MapMode_Twips,
 115     MapMode_Points,
 116     MapMode_Metric,
 117
 118     UserScale_StretchHoriz,
 119     UserScale_ShrinkHoriz,
 120     UserScale_StretchVertic,
 121     UserScale_ShrinkVertic,
 122     UserScale_Restore,
 123
 124     AxisMirror_Horiz,
 125     AxisMirror_Vertic,
 126
 127     LogicalOrigin_MoveDown,
 128     LogicalOrigin_MoveUp,
 129     LogicalOrigin_MoveLeft,
 130     LogicalOrigin_MoveRight,
 131
 132     Colour_TextForeground,
 133     Colour_TextBackground,
 134     Colour_Background,
 135     Colour_BackgroundMode,
 136
 137     MenuOption_Last = Colour_BackgroundMode
 138 };
 139
 140 // ----------------------------------------------------------------------------
 141 // event tables and other macros for wxWindows
 142 // ----------------------------------------------------------------------------
 143
 144 // the event tables connect the wxWindows events with the functions (event
 145 // handlers) which process them. It can be also done at run-time, but for the
 146 // simple menu events like this the static method is much simpler.
 147 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 148
 149     EVT_MOTION (MyFrame::OnMouseMove)
 150     EVT_PAINT  (MyFrame::OnPaint)
 151
 152     EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
 153     EVT_MENU(Minimal_About, MyFrame::OnAbout)
 154
 155     EVT_MENU_RANGE(MenuOption_First, MenuOption_Last, MyFrame::OnOption)
 156 END_EVENT_TABLE()
 157
 158 // Create a new application object: this macro will allow wxWindows to create
 159 // the application object during program execution (it's better than using a
 160 // static object for many reasons) and also declares the accessor function
 161 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 162 // not wxApp)
 163 IMPLEMENT_APP(MyApp)
 164
 165 // ============================================================================
 166 // implementation
 167 // ============================================================================
 168
 169 // ----------------------------------------------------------------------------
 170 // the application class
 171 // ----------------------------------------------------------------------------
 172
 173 // `Main program' equivalent: the program execution "starts" here
 174 bool MyApp::OnInit()
 175 {
 176     // Create the main application window
 177     MyFrame *frame = new MyFrame("Drawing sample",
 178                                  wxPoint(50, 50), wxSize(450, 340));
 179
 180     // Show it and tell the application that it's our main window
 181     frame->Show(TRUE);
 182     SetTopWindow(frame);
 183
 184     // success: wxApp::OnRun() will be called which will enter the main message
 185     // loop and the application will run. If we returned FALSE here, the
 186     // application would exit immediately.
 187     return TRUE;
 188 }
 189
 190 // ----------------------------------------------------------------------------
 191 // main frame
 192 // ----------------------------------------------------------------------------
 193
 194 // frame constructor
 195 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 196        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 197 {
 198     // set the frame icon
 199     SetIcon(wxICON(mondrian));
 200
 201     wxMenu *menuFile = new wxMenu;
 202     menuFile->Append(Minimal_About, "&About...\tCtrl-A", "Show about dialog");
 203     menuFile->AppendSeparator();
 204     menuFile->Append(Minimal_Quit, "E&xit\tAlt-X", "Quit this program");
 205
 206     wxMenu *menuMapMode = new wxMenu;
 207     menuMapMode->Append( MapMode_Text, "&TEXT map mode" );
 208     menuMapMode->Append( MapMode_Lometric, "&LOMETRIC map mode" );
 209     menuMapMode->Append( MapMode_Twips, "T&WIPS map mode" );
 210     menuMapMode->Append( MapMode_Points, "&POINTS map mode" );
 211     menuMapMode->Append( MapMode_Metric, "&METRIC map mode" );
 212
 213     wxMenu *menuUserScale = new wxMenu;
 214     menuUserScale->Append( UserScale_StretchHoriz, "Stretch horizontally\tCtrl-H" );
 215     menuUserScale->Append( UserScale_ShrinkHoriz, "Shrink  horizontally\tCtrl-G" );
 216     menuUserScale->Append( UserScale_StretchVertic, "Stretch vertically\tCtrl-V" );
 217     menuUserScale->Append( UserScale_ShrinkVertic, "Shrink vertically\tCtrl-W" );
 218     menuUserScale->AppendSeparator();
 219     menuUserScale->Append( UserScale_Restore, "Restore to normal\tCtrl-0" );
 220
 221     wxMenu *menuAxis = new wxMenu;
 222     menuAxis->Append( AxisMirror_Horiz, "Mirror horizontally\tCtrl-M", "", TRUE );
 223     menuAxis->Append( AxisMirror_Vertic, "Mirror vertically\tCtrl-N", "", TRUE );
 224
 225     wxMenu *menuLogical = new wxMenu;
 226     menuLogical->Append( LogicalOrigin_MoveDown, "Move &down\tCtrl-D" );
 227     menuLogical->Append( LogicalOrigin_MoveUp, "Move &up\tCtrl-U" );
 228     menuLogical->Append( LogicalOrigin_MoveLeft, "Move &right\tCtrl-L" );
 229     menuLogical->Append( LogicalOrigin_MoveRight, "Move &left\tCtrl-R" );
 230
 231     wxMenu *menuColour = new wxMenu;
 232     menuColour->Append( Colour_TextForeground, "Text foreground..." );
 233     menuColour->Append( Colour_TextBackground, "Text background..." );
 234     menuColour->Append( Colour_Background, "Background colour..." );
 235     menuColour->Append( Colour_BackgroundMode, "Opaque/transparent\tCtrl-B", "", TRUE );
 236
 237     // now append the freshly created menu to the menu bar...
 238     wxMenuBar *menuBar = new wxMenuBar;
 239     menuBar->Append(menuFile, "&File");
 240     menuBar->Append(menuMapMode, "&MapMode");
 241     menuBar->Append(menuUserScale, "&UserScale");
 242     menuBar->Append(menuAxis, "&Axis");
 243     menuBar->Append(menuLogical, "&LogicalOrigin");
 244     menuBar->Append(menuColour, "&Colours");
 245
 246     // ... and attach this menu bar to the frame
 247     SetMenuBar(menuBar);
 248
 249     // create a status bar just for fun (by default with 1 pane only)
 250     CreateStatusBar(2);
 251     SetStatusText("Welcome to wxWindows!");
 252
 253     m_mapMode = wxMM_TEXT;
 254     m_xUserScale = 1.0;
 255     m_yUserScale = 1.0;
 256     m_xLogicalOrigin = 0;
 257     m_yLogicalOrigin = 0;
 258     m_xAxisReversed =
 259     m_yAxisReversed = FALSE;
 260     m_backgroundMode = wxSOLID;
 261 }
 262
 263
 264 // event handlers
 265
 266 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 267 {
 268     // TRUE is to force the frame to close
 269     Close(TRUE);
 270 }
 271
 272 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 273 {
 274     wxString msg;
 275     msg.Printf( _T("This is the about dialog of the drawing sample.\n")
 276                 _T("Copyright (c) Robert Roebling 1999")
 277               );
 278
 279     wxMessageBox(msg, "About Drawing", wxOK | wxICON_INFORMATION, this);
 280 }
 281
 282 void MyFrame::OnOption(wxCommandEvent &event)
 283 {
 284     switch (event.GetInt())
 285     {
 286         case MapMode_Text:
 287             m_mapMode = wxMM_TEXT;
 288             break;
 289         case MapMode_Lometric:
 290             m_mapMode = wxMM_LOMETRIC;
 291             break;
 292         case MapMode_Twips:
 293             m_mapMode = wxMM_TWIPS;
 294             break;
 295         case MapMode_Points:
 296             m_mapMode = wxMM_POINTS;
 297             break;
 298         case MapMode_Metric:
 299             m_mapMode = wxMM_METRIC;
 300             break;
 301
 302         case LogicalOrigin_MoveDown:
 303             m_yLogicalOrigin += 10;
 304             break;
 305         case LogicalOrigin_MoveUp:
 306             m_yLogicalOrigin -= 10;
 307             break;
 308         case LogicalOrigin_MoveLeft:
 309             m_xLogicalOrigin += 10;
 310             break;
 311         case LogicalOrigin_MoveRight:
 312             m_xLogicalOrigin -= 10;
 313             break;
 314
 315         case UserScale_StretchHoriz:
 316             m_xUserScale *= 1.10;
 317             break;
 318         case UserScale_ShrinkHoriz:
 319             m_xUserScale /= 1.10;
 320             break;
 321         case UserScale_StretchVertic:
 322             m_yUserScale *= 1.10;
 323             break;
 324         case UserScale_ShrinkVertic:
 325             m_yUserScale /= 1.10;
 326             break;
 327         case UserScale_Restore:
 328             m_xUserScale =
 329             m_yUserScale = 1.0;
 330             break;
 331
 332         case AxisMirror_Vertic:
 333             m_yAxisReversed = !m_yAxisReversed;
 334             break;
 335         case AxisMirror_Horiz:
 336             m_xAxisReversed = !m_xAxisReversed;
 337             break;
 338
 339         case Colour_TextForeground:
 340             m_colourForeground = SelectColour();
 341             break;
 342         case Colour_TextBackground:
 343             m_colourBackground = SelectColour();
 344             break;
 345         case Colour_Background:
 346             {
 347                 wxColour col = SelectColour();
 348                 if ( col.Ok() )
 349                 {
 350                     m_backgroundBrush.SetColour(col);
 351                 }
 352             }
 353             break;
 354         case Colour_BackgroundMode:
 355             m_backgroundMode = m_backgroundMode == wxSOLID ? wxTRANSPARENT
 356                                                            : wxSOLID;
 357             break;
 358
 359         default:
 360             // skip Refresh()
 361             return;
 362     }
 363
 364     Refresh();
 365 }
 366
 367 void MyFrame::PrepareDC(wxDC& dc)
 368 {
 369     dc.SetMapMode( m_mapMode );
 370     dc.SetUserScale( m_xUserScale, m_yUserScale );
 371     dc.SetLogicalOrigin( m_xLogicalOrigin, m_yLogicalOrigin );
 372     dc.SetAxisOrientation( !m_xAxisReversed, m_yAxisReversed );
 373 }
 374
 375 void MyFrame::OnPaint(wxPaintEvent &WXUNUSED(event) )
 376 {
 377     wxPaintDC dc(this);
 378     PrepareDC(dc);
 379
 380     dc.SetBackgroundMode( m_backgroundMode );
 381     if ( m_backgroundBrush.Ok() )
 382         dc.SetBackground( m_backgroundBrush );
 383     if ( m_colourForeground.Ok() )
 384         dc.SetTextForeground( m_colourForeground );
 385     if ( m_colourBackground.Ok() )
 386         dc.SetTextBackground( m_colourBackground );
 387
 388     // mark the origin
 389     dc.DrawCircle(0, 0, 10);
 390 #ifndef __WXGTK__   // not implemented in wxGTK :-(
 391     dc.FloodFill(0, 0, wxColour(255, 0, 0));
 392 #endif // __WXGTK__
 393
 394     dc.DrawRectangle( 10, 10, 90, 90 );
 395     dc.DrawRoundedRectangle( 110, 10, 90, 90, 5 );
 396
 397     dc.SetPen( *wxWHITE_PEN );
 398     dc.DrawLine( 10, 110, 100, 110 );
 399     dc.SetPen( *wxBLACK_PEN );
 400     dc.DrawLine( 100, 110, 100, 200 );
 401     dc.SetPen( *wxWHITE_PEN );
 402     dc.DrawLine( 100, 200, 10, 200 );
 403     dc.SetPen( *wxBLACK_PEN );
 404     dc.DrawLine( 10, 200, 10, 110 );
 405
 406     wxPen white_butt( "white", 1, wxSOLID );
 407     white_butt.SetCap( wxCAP_BUTT );
 408     wxPen black_butt( "black", 1, wxSOLID );
 409     black_butt.SetCap( wxCAP_BUTT );
 410
 411     dc.SetPen( white_butt );
 412     dc.DrawLine( 110, 110, 200, 110 );
 413     dc.SetPen( black_butt );
 414     dc.DrawLine( 200, 110, 200, 200 );
 415     dc.SetPen( white_butt );
 416     dc.DrawLine( 200, 200, 110, 200 );
 417     dc.SetPen( black_butt );
 418     dc.DrawLine( 110, 200, 110, 110 );
 419
 420     wxPen white_miter( "white", 1, wxSOLID );
 421     white_miter.SetJoin( wxJOIN_MITER );
 422     wxPen black_miter( "black", 1, wxSOLID );
 423     black_miter.SetJoin( wxJOIN_MITER );
 424
 425     dc.SetPen( white_miter );
 426     dc.DrawLine( 210, 110, 300, 110 );
 427     dc.SetPen( black_miter );
 428     dc.DrawLine( 300, 110, 300, 200 );
 429     dc.SetPen( white_miter );
 430     dc.DrawLine( 300, 200, 210, 200 );
 431     dc.SetPen( black_miter );
 432     dc.DrawLine( 210, 200, 210, 110 );
 433
 434
 435     dc.DrawText( "This is text\n(on multiple lines)", 110, 10 );
 436
 437     dc.DrawIcon( wxICON(mondrian), 110, 40 );
 438 }
 439
 440 void MyFrame::OnMouseMove(wxMouseEvent &event)
 441 {
 442     wxClientDC dc(this);
 443     PrepareDC(dc);
 444
 445     wxPoint pos = event.GetPosition();
 446     long x = dc.DeviceToLogicalX( pos.x );
 447     long y = dc.DeviceToLogicalY( pos.y );
 448     wxString str;
 449     str.Printf( "Current mouse position: %d,%d", (int)x, (int)y );
 450     SetStatusText( str );
 451 }
 452
 453 wxColour MyFrame::SelectColour()
 454 {
 455     wxColour col;
 456     wxColourData data;
 457     wxColourDialog dialog(this, &data);
 458
 459     if ( dialog.ShowModal() == wxID_OK )
 460     {
 461         col = dialog.GetColourData().GetColour();
 462     }
 463
 464     return col;
 465 }