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