///////////////////////////////////////////////////////////////////////////// // Name: drawing.cpp // Purpose: shows and tests wxDC features // Author: Robert Roebling // Modified by: // Created: 04/01/98 // RCS-ID: $Id$ // Copyright: (c) Robert Roebling // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ============================================================================ // declarations // ============================================================================ // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- #if defined(__GNUG__) && !defined(__APPLE__) #pragma implementation "drawing.cpp" #pragma interface "drawing.cpp" #endif // For compilers that support precompilation, includes "wx/wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif // for all others, include the necessary headers (this file is usually all you // need because it includes almost all "standard" wxWidgets headers #ifndef WX_PRECOMP #include "wx/wx.h" #endif #include "wx/colordlg.h" #include "wx/image.h" #include "wx/artprov.h" // ---------------------------------------------------------------------------- // ressources // ---------------------------------------------------------------------------- // the application icon #if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__) #include "mondrian.xpm" #endif // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- // what do we show on screen (there are too many shapes to put them all on // screen simultaneously) enum ScreenToShow { Show_Default, Show_Text, Show_Lines, Show_Brushes, Show_Polygons, Show_Mask, Show_Ops, Show_Regions, Show_Circles }; // ---------------------------------------------------------------------------- // global variables // ---------------------------------------------------------------------------- static wxBitmap *gs_bmpNoMask = NULL, *gs_bmpWithColMask = NULL, *gs_bmpMask = NULL, *gs_bmpWithMask = NULL, *gs_bmp4 = NULL, *gs_bmp4_mono = NULL, *gs_bmp36 = NULL; // ---------------------------------------------------------------------------- // private classes // ---------------------------------------------------------------------------- // Define a new application type, each program should derive a class from wxApp class MyApp : public wxApp { public: // override base class virtuals // ---------------------------- // this one is called on application startup and is a good place for the app // initialization (doing it here and not in the ctor allows to have an error // return: if OnInit() returns false, the application terminates) virtual bool OnInit(); virtual int OnExit() { DeleteBitmaps(); return 0; } protected: void DeleteBitmaps(); bool LoadImages(); }; class MyCanvas; // Define a new frame type: this is going to be our main frame class MyFrame : public wxFrame { public: // ctor(s) MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size); // event handlers (these functions should _not_ be virtual) void OnQuit(wxCommandEvent& event); void OnAbout(wxCommandEvent& event); void OnClip(wxCommandEvent& event); void OnShow(wxCommandEvent &event); void OnOption(wxCommandEvent &event); wxColour SelectColour(); void PrepareDC(wxDC& dc); int m_backgroundMode; int m_textureBackground; int m_mapMode; double m_xUserScale; double m_yUserScale; int m_xLogicalOrigin; int m_yLogicalOrigin; bool m_xAxisReversed, m_yAxisReversed; wxColour m_colourForeground, // these are _text_ colours m_colourBackground; wxBrush m_backgroundBrush; MyCanvas *m_canvas; private: // any class wishing to process wxWidgets events must use this macro DECLARE_EVENT_TABLE() }; // define a scrollable canvas for drawing onto class MyCanvas: public wxScrolledWindow { public: MyCanvas( MyFrame *parent ); void OnPaint(wxPaintEvent &event); void OnMouseMove(wxMouseEvent &event); void ToShow(ScreenToShow show) { m_show = show; Refresh(); } // set or remove the clipping region void Clip(bool clip) { m_clip = clip; Refresh(); } protected: void DrawTestLines( int x, int y, int width, wxDC &dc ); void DrawTestPoly(wxDC& dc); void DrawTestBrushes(wxDC& dc); void DrawText(wxDC& dc); void DrawImages(wxDC& dc); void DrawWithLogicalOps(wxDC& dc); void DrawRegions(wxDC& dc); void DrawCircles(wxDC& dc); void DrawDefault(wxDC& dc); void DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime); private: MyFrame *m_owner; ScreenToShow m_show; wxBitmap m_smile_bmp; wxIcon m_std_icon; bool m_clip; DECLARE_EVENT_TABLE() }; // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- // IDs for the controls and the menu commands enum { // menu items File_Quit = 1, File_About, MenuShow_First, File_ShowDefault = MenuShow_First, File_ShowText, File_ShowLines, File_ShowBrushes, File_ShowPolygons, File_ShowMask, File_ShowOps, File_ShowRegions, File_ShowCircles, MenuShow_Last = File_ShowCircles, File_Clip, MenuOption_First, MapMode_Text = MenuOption_First, MapMode_Lometric, MapMode_Twips, MapMode_Points, MapMode_Metric, UserScale_StretchHoriz, UserScale_ShrinkHoriz, UserScale_StretchVertic, UserScale_ShrinkVertic, UserScale_Restore, AxisMirror_Horiz, AxisMirror_Vertic, LogicalOrigin_MoveDown, LogicalOrigin_MoveUp, LogicalOrigin_MoveLeft, LogicalOrigin_MoveRight, LogicalOrigin_Set, LogicalOrigin_Restore, Colour_TextForeground, Colour_TextBackground, Colour_Background, Colour_BackgroundMode, Colour_TextureBackgound, MenuOption_Last = Colour_TextureBackgound }; // ---------------------------------------------------------------------------- // event tables and other macros for wxWidgets // ---------------------------------------------------------------------------- // Create a new application object: this macro will allow wxWidgets to create // the application object during program execution (it's better than using a // static object for many reasons) and also declares the accessor function // wxGetApp() which will return the reference of the right type (i.e. MyApp and // not wxApp) IMPLEMENT_APP(MyApp) // ============================================================================ // implementation // ============================================================================ // ---------------------------------------------------------------------------- // the application class // ---------------------------------------------------------------------------- bool MyApp::LoadImages() { gs_bmpNoMask = new wxBitmap; gs_bmpWithColMask = new wxBitmap; gs_bmpMask = new wxBitmap; gs_bmpWithMask = new wxBitmap; gs_bmp4 = new wxBitmap; gs_bmp4_mono = new wxBitmap; gs_bmp36 = new wxBitmap; wxPathList pathList; pathList.Add(_T(".")); pathList.Add(_T("..")); wxString path = pathList.FindValidPath(_T("pat4.bmp")); if ( !path ) return false; /* 4 colour bitmap */ gs_bmp4->LoadFile(path, wxBITMAP_TYPE_BMP); /* turn into mono-bitmap */ gs_bmp4_mono->LoadFile(path, wxBITMAP_TYPE_BMP); wxMask* mask4 = new wxMask(*gs_bmp4_mono, *wxBLACK); gs_bmp4_mono->SetMask(mask4); path = pathList.FindValidPath(_T("pat36.bmp")); if ( !path ) return false; gs_bmp36->LoadFile(path, wxBITMAP_TYPE_BMP); wxMask* mask36 = new wxMask(*gs_bmp36, *wxBLACK); gs_bmp36->SetMask(mask36); path = pathList.FindValidPath(_T("image.bmp")); if ( !path ) return false; gs_bmpNoMask->LoadFile(path, wxBITMAP_TYPE_BMP); gs_bmpWithMask->LoadFile(path, wxBITMAP_TYPE_BMP); gs_bmpWithColMask->LoadFile(path, wxBITMAP_TYPE_BMP); path = pathList.FindValidPath(_T("mask.bmp")); if ( !path ) return false; gs_bmpMask->LoadFile(path, wxBITMAP_TYPE_BMP); wxMask *mask = new wxMask(*gs_bmpMask, *wxBLACK); gs_bmpWithMask->SetMask(mask); mask = new wxMask(*gs_bmpWithColMask, *wxWHITE); gs_bmpWithColMask->SetMask(mask); return true; } // `Main program' equivalent: the program execution "starts" here bool MyApp::OnInit() { // Create the main application window MyFrame *frame = new MyFrame(_T("Drawing sample"), wxPoint(50, 50), wxSize(550, 340)); // Show it and tell the application that it's our main window frame->Show(true); SetTopWindow(frame); if ( !LoadImages() ) { wxLogError(wxT("Can't load one of the bitmap files needed ") wxT("for this sample from the current or parent ") wxT("directory, please copy them there.")); // stop here DeleteBitmaps(); return false; } // ok, continue return true; } void MyApp::DeleteBitmaps() { delete gs_bmpNoMask; delete gs_bmpWithColMask; delete gs_bmpMask; delete gs_bmpWithMask; delete gs_bmp4; delete gs_bmp4_mono; delete gs_bmp36; gs_bmpNoMask = NULL; gs_bmpWithColMask = NULL; gs_bmpMask = NULL; gs_bmpWithMask = NULL; gs_bmp4 = NULL; gs_bmp4_mono = NULL; gs_bmp36 = NULL; } // ---------------------------------------------------------------------------- // MyCanvas // ---------------------------------------------------------------------------- // the event tables connect the wxWidgets events with the functions (event // handlers) which process them. BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow) EVT_PAINT (MyCanvas::OnPaint) EVT_MOTION (MyCanvas::OnMouseMove) END_EVENT_TABLE() #include "smile.xpm" MyCanvas::MyCanvas(MyFrame *parent) : wxScrolledWindow(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxHSCROLL | wxVSCROLL | wxNO_FULL_REPAINT_ON_RESIZE) { m_owner = parent; m_show = Show_Default; m_smile_bmp = wxBitmap(smile_xpm); m_std_icon = wxArtProvider::GetIcon(wxART_INFORMATION); m_clip = false; } void MyCanvas::DrawTestBrushes(wxDC& dc) { static const wxCoord WIDTH = 200; static const wxCoord HEIGHT = 80; wxCoord x = 10, y = 10; dc.SetBrush(wxBrush(*wxGREEN, wxSOLID)); dc.DrawRectangle(x, y, WIDTH, HEIGHT); dc.DrawText(_T("Solid green"), x + 10, y + 10); y += HEIGHT; dc.SetBrush(wxBrush(*wxRED, wxCROSSDIAG_HATCH)); dc.DrawRectangle(x, y, WIDTH, HEIGHT); dc.DrawText(_T("Hatched red"), x + 10, y + 10); y += HEIGHT; dc.SetBrush(wxBrush(*gs_bmpMask)); dc.DrawRectangle(x, y, WIDTH, HEIGHT); dc.DrawText(_T("Stipple mono"), x + 10, y + 10); y += HEIGHT; dc.SetBrush(wxBrush(*gs_bmpNoMask)); dc.DrawRectangle(x, y, WIDTH, HEIGHT); dc.DrawText(_T("Stipple colour"), x + 10, y + 10); } void MyCanvas::DrawTestPoly(wxDC& dc) { wxBrush brushHatch(*wxRED, wxFDIAGONAL_HATCH); dc.SetBrush(brushHatch); wxPoint star[5]; star[0] = wxPoint(100, 60); star[1] = wxPoint(60, 150); star[2] = wxPoint(160, 100); star[3] = wxPoint(40, 100); star[4] = wxPoint(140, 150); dc.DrawText(_T("You should see two (irregular) stars below, the left one ") _T("hatched"), 10, 10); dc.DrawText(_T("except for the central region and the right ") _T("one entirely hatched"), 10, 30); dc.DrawText(_T("The third star only has a hatched outline"), 10, 50); dc.DrawPolygon(WXSIZEOF(star), star, 0, 30); dc.DrawPolygon(WXSIZEOF(star), star, 160, 30, wxWINDING_RULE); wxPoint star2[10]; star2[0] = wxPoint(0, 100); star2[1] = wxPoint(-59, -81); star2[2] = wxPoint(95, 31); star2[3] = wxPoint(-95, 31); star2[4] = wxPoint(59, -81); star2[5] = wxPoint(0, 80); star2[6] = wxPoint(-47, -64); star2[7] = wxPoint(76, 24); star2[8] = wxPoint(-76, 24); star2[9] = wxPoint(47, -64); int count[2] = {5, 5}; dc.DrawPolyPolygon(WXSIZEOF(count), count, star2, 450, 150); } void MyCanvas::DrawTestLines( int x, int y, int width, wxDC &dc ) { dc.SetPen( wxPen( wxT("black"), width, wxSOLID) ); dc.SetBrush( *wxRED_BRUSH ); dc.DrawText(wxString::Format(wxT("Testing lines of width %d"), width), x + 10, y - 10); dc.DrawRectangle( x+10, y+10, 100, 190 ); dc.DrawText(_T("Solid/dot/short dash/long dash/dot dash"), x + 150, y + 10); dc.SetPen( wxPen( wxT("black"), width, wxSOLID) ); dc.DrawLine( x+20, y+20, 100, y+20 ); dc.SetPen( wxPen( wxT("black"), width, wxDOT) ); dc.DrawLine( x+20, y+30, 100, y+30 ); dc.SetPen( wxPen( wxT("black"), width, wxSHORT_DASH) ); dc.DrawLine( x+20, y+40, 100, y+40 ); dc.SetPen( wxPen( wxT("black"), width, wxLONG_DASH) ); dc.DrawLine( x+20, y+50, 100, y+50 ); dc.SetPen( wxPen( wxT("black"), width, wxDOT_DASH) ); dc.DrawLine( x+20, y+60, 100, y+60 ); dc.DrawText(_T("Misc hatches"), x + 150, y + 70); dc.SetPen( wxPen( wxT("black"), width, wxBDIAGONAL_HATCH) ); dc.DrawLine( x+20, y+70, 100, y+70 ); dc.SetPen( wxPen( wxT("black"), width, wxCROSSDIAG_HATCH) ); dc.DrawLine( x+20, y+80, 100, y+80 ); dc.SetPen( wxPen( wxT("black"), width, wxFDIAGONAL_HATCH) ); dc.DrawLine( x+20, y+90, 100, y+90 ); dc.SetPen( wxPen( wxT("black"), width, wxCROSS_HATCH) ); dc.DrawLine( x+20, y+100, 100, y+100 ); dc.SetPen( wxPen( wxT("black"), width, wxHORIZONTAL_HATCH) ); dc.DrawLine( x+20, y+110, 100, y+110 ); dc.SetPen( wxPen( wxT("black"), width, wxVERTICAL_HATCH) ); dc.DrawLine( x+20, y+120, 100, y+120 ); dc.DrawText(_T("User dash"), x + 150, y + 140); wxPen ud( wxT("black"), width, wxUSER_DASH ); wxDash dash1[6]; dash1[0] = 8; // Long dash <---------+ dash1[1] = 2; // Short gap | dash1[2] = 3; // Short dash | dash1[3] = 2; // Short gap | dash1[4] = 3; // Short dash | dash1[5] = 2; // Short gap and repeat + ud.SetDashes( 6, dash1 ); dc.SetPen( ud ); dc.DrawLine( x+20, y+140, 100, y+140 ); dash1[0] = 5; // Make first dash shorter ud.SetDashes( 6, dash1 ); dc.SetPen( ud ); dc.DrawLine( x+20, y+150, 100, y+150 ); dash1[2] = 5; // Make second dash longer ud.SetDashes( 6, dash1 ); dc.SetPen( ud ); dc.DrawLine( x+20, y+160, 100, y+160 ); dash1[4] = 5; // Make third dash longer ud.SetDashes( 6, dash1 ); dc.SetPen( ud ); dc.DrawLine( x+20, y+170, 100, y+170 ); } void MyCanvas::DrawDefault(wxDC& dc) { // mark the origin dc.DrawCircle(0, 0, 10); //flood fill using brush, starting at 1,1 and replacing whatever colour we find there dc.SetBrush(wxBrush(wxColour(128,128,0), wxSOLID)); wxColour tmpColour ; dc.GetPixel(1,1, &tmpColour); dc.FloodFill(1,1, tmpColour, wxFLOOD_SURFACE); dc.DrawCheckMark(5, 80, 15, 15); dc.DrawCheckMark(25, 80, 30, 30); dc.DrawCheckMark(60, 80, 60, 60); // this is the test for "blitting bitmap into DC damages selected brush" bug wxCoord rectSize = m_std_icon.GetWidth() + 10; wxCoord x = 100; dc.SetPen(*wxTRANSPARENT_PEN); dc.SetBrush( *wxGREEN_BRUSH ); dc.DrawRectangle(x, 10, rectSize, rectSize); dc.DrawBitmap(m_std_icon, x + 5, 15, true); x += rectSize + 10; dc.DrawRectangle(x, 10, rectSize, rectSize); dc.DrawIcon(m_std_icon, x + 5, 15); x += rectSize + 10; dc.DrawRectangle(x, 10, rectSize, rectSize); // test for "transparent" bitmap drawing (it intersects with the last // rectangle above) //dc.SetBrush( *wxTRANSPARENT_BRUSH ); if (m_smile_bmp.Ok()) dc.DrawBitmap(m_smile_bmp, x + rectSize - 20, rectSize - 10, true); dc.SetBrush( *wxBLACK_BRUSH ); dc.DrawRectangle( 0, 160, 1000, 300 ); // draw lines wxBitmap bitmap(20,70); wxMemoryDC memdc; memdc.SelectObject( bitmap ); memdc.SetBrush( *wxBLACK_BRUSH ); memdc.SetPen( *wxWHITE_PEN ); memdc.DrawRectangle(0,0,20,70); memdc.DrawLine( 10,0,10,70 ); // to the right wxPen pen = *wxRED_PEN; memdc.SetPen(pen); memdc.DrawLine( 10, 5,10, 5 ); memdc.DrawLine( 10,10,11,10 ); memdc.DrawLine( 10,15,12,15 ); memdc.DrawLine( 10,20,13,20 ); /* memdc.SetPen(*wxRED_PEN); memdc.DrawLine( 12, 5,12, 5 ); memdc.DrawLine( 12,10,13,10 ); memdc.DrawLine( 12,15,14,15 ); memdc.DrawLine( 12,20,15,20 ); */ // same to the left memdc.DrawLine( 10,25,10,25 ); memdc.DrawLine( 10,30, 9,30 ); memdc.DrawLine( 10,35, 8,35 ); memdc.DrawLine( 10,40, 7,40 ); // XOR draw lines dc.SetPen(*wxWHITE_PEN); memdc.SetLogicalFunction( wxINVERT ); memdc.SetPen( *wxWHITE_PEN ); memdc.DrawLine( 10,50,10,50 ); memdc.DrawLine( 10,55,11,55 ); memdc.DrawLine( 10,60,12,60 ); memdc.DrawLine( 10,65,13,65 ); memdc.DrawLine( 12,50,12,50 ); memdc.DrawLine( 12,55,13,55 ); memdc.DrawLine( 12,60,14,60 ); memdc.DrawLine( 12,65,15,65 ); memdc.SelectObject( wxNullBitmap ); dc.DrawBitmap( bitmap, 10, 170 ); wxImage image = bitmap.ConvertToImage(); image.Rescale( 60,210 ); bitmap = wxBitmap(image); dc.DrawBitmap( bitmap, 50, 170 ); // test the rectangle outline drawing - there should be one pixel between // the rect and the lines dc.SetPen(*wxWHITE_PEN); dc.SetBrush( *wxTRANSPARENT_BRUSH ); dc.DrawRectangle(150, 170, 49, 29); dc.DrawRectangle(200, 170, 49, 29); dc.SetPen(*wxWHITE_PEN); dc.DrawLine(250, 210, 250, 170); dc.DrawLine(260, 200, 150, 200); // test the rectangle filled drawing - there should be one pixel between // the rect and the lines dc.SetPen(*wxTRANSPARENT_PEN); dc.SetBrush( *wxWHITE_BRUSH ); dc.DrawRectangle(300, 170, 49, 29); dc.DrawRectangle(350, 170, 49, 29); dc.SetPen(*wxWHITE_PEN); dc.DrawLine(400, 170, 400, 210); dc.DrawLine(300, 200, 410, 200); // a few more tests of this kind dc.SetPen(*wxRED_PEN); dc.SetBrush( *wxWHITE_BRUSH ); dc.DrawRectangle(300, 220, 1, 1); dc.DrawRectangle(310, 220, 2, 2); dc.DrawRectangle(320, 220, 3, 3); dc.DrawRectangle(330, 220, 4, 4); dc.SetPen(*wxTRANSPARENT_PEN); dc.SetBrush( *wxWHITE_BRUSH ); dc.DrawRectangle(300, 230, 1, 1); dc.DrawRectangle(310, 230, 2, 2); dc.DrawRectangle(320, 230, 3, 3); dc.DrawRectangle(330, 230, 4, 4); // and now for filled rect with outline dc.SetPen(*wxRED_PEN); dc.SetBrush( *wxWHITE_BRUSH ); dc.DrawRectangle(500, 170, 49, 29); dc.DrawRectangle(550, 170, 49, 29); dc.SetPen(*wxWHITE_PEN); dc.DrawLine(600, 170, 600, 210); dc.DrawLine(500, 200, 610, 200); // test the rectangle outline drawing - there should be one pixel between // the rect and the lines dc.SetPen(*wxWHITE_PEN); dc.SetBrush( *wxTRANSPARENT_BRUSH ); dc.DrawRoundedRectangle(150, 270, 49, 29, 6); dc.DrawRoundedRectangle(200, 270, 49, 29, 6); dc.SetPen(*wxWHITE_PEN); dc.DrawLine(250, 270, 250, 310); dc.DrawLine(150, 300, 260, 300); // test the rectangle filled drawing - there should be one pixel between // the rect and the lines dc.SetPen(*wxTRANSPARENT_PEN); dc.SetBrush( *wxWHITE_BRUSH ); dc.DrawRoundedRectangle(300, 270, 49, 29, 6); dc.DrawRoundedRectangle(350, 270, 49, 29, 6); dc.SetPen(*wxWHITE_PEN); dc.DrawLine(400, 270, 400, 310); dc.DrawLine(300, 300, 410, 300); // Added by JACS to demonstrate bizarre behaviour. // With a size of 70, we get a missing red RHS, // and the hight is too small, so we get yellow // showing. With a size of 40, it draws as expected: // it just shows a white rectangle with red outline. int totalWidth = 70; int totalHeight = 70; wxBitmap bitmap2(totalWidth, totalHeight); wxMemoryDC memdc2; memdc2.SelectObject(bitmap2); wxBrush yellowBrush(wxColour(255, 255, 0), wxSOLID); memdc2.SetBackground(yellowBrush); memdc2.Clear(); wxPen yellowPen(wxColour(255, 255, 0), 1, wxSOLID); // Now draw a white rectangle with red outline. It should // entirely eclipse the yellow background. memdc2.SetPen(*wxRED_PEN); memdc2.SetBrush(*wxWHITE_BRUSH); memdc2.DrawRectangle(0, 0, totalWidth, totalHeight); memdc2.SetPen(wxNullPen); memdc2.SetBrush(wxNullBrush); memdc2.SelectObject(wxNullBitmap); dc.DrawBitmap(bitmap2, 500, 270); // Repeat, but draw directly on dc // Draw a yellow rectangle filling the bitmap x = 600; int y = 270; dc.SetPen(yellowPen); dc.SetBrush(yellowBrush); dc.DrawRectangle(x, y, totalWidth, totalHeight); // Now draw a white rectangle with red outline. It should // entirely eclipse the yellow background. dc.SetPen(*wxRED_PEN); dc.SetBrush(*wxWHITE_BRUSH); dc.DrawRectangle(x, y, totalWidth, totalHeight); } void MyCanvas::DrawText(wxDC& dc) { // set underlined font for testing dc.SetFont( wxFont(12, wxMODERN, wxNORMAL, wxNORMAL, true) ); dc.DrawText( _T("This is text"), 110, 10 ); dc.DrawRotatedText( _T("That is text"), 20, 10, -45 ); // use wxSWISS_FONT and not wxNORMAL_FONT as the latter can't be rotated // under Win9x (it is not TrueType) dc.SetFont( *wxSWISS_FONT ); wxString text; dc.SetBackgroundMode(wxTRANSPARENT); for ( int n = -180; n < 180; n += 30 ) { text.Printf(wxT(" %d rotated text"), n); dc.DrawRotatedText(text , 400, 400, n); } dc.SetFont( wxFont( 18, wxSWISS, wxNORMAL, wxNORMAL ) ); dc.DrawText( _T("This is Swiss 18pt text."), 110, 40 ); long length; long height; long descent; dc.GetTextExtent( _T("This is Swiss 18pt text."), &length, &height, &descent ); text.Printf( wxT("Dimensions are length %ld, height %ld, descent %ld"), length, height, descent ); dc.DrawText( text, 110, 80 ); text.Printf( wxT("CharHeight() returns: %d"), dc.GetCharHeight() ); dc.DrawText( text, 110, 120 ); dc.DrawRectangle( 100, 40, 4, height ); // test the logical function effect wxCoord y = 150; dc.SetLogicalFunction(wxINVERT); dc.DrawText( _T("There should be no text below"), 110, 150 ); dc.DrawRectangle( 110, y, 100, height ); // twice drawn inverted should result in invisible y += height; dc.DrawText( _T("Invisible text"), 110, y ); dc.DrawRectangle( 110, y, 100, height ); dc.DrawText( _T("Invisible text"), 110, y ); dc.DrawRectangle( 110, y, 100, height ); dc.SetLogicalFunction(wxCOPY); y += height; dc.DrawRectangle( 110, y, 100, height ); dc.DrawText( _T("Visible text"), 110, y ); } static const struct { const wxChar *name; int rop; } rasterOperations[] = { { wxT("wxAND"), wxAND }, { wxT("wxAND_INVERT"), wxAND_INVERT }, { wxT("wxAND_REVERSE"), wxAND_REVERSE }, { wxT("wxCLEAR"), wxCLEAR }, { wxT("wxCOPY"), wxCOPY }, { wxT("wxEQUIV"), wxEQUIV }, { wxT("wxINVERT"), wxINVERT }, { wxT("wxNAND"), wxNAND }, { wxT("wxNO_OP"), wxNO_OP }, { wxT("wxOR"), wxOR }, { wxT("wxOR_INVERT"), wxOR_INVERT }, { wxT("wxOR_REVERSE"), wxOR_REVERSE }, { wxT("wxSET"), wxSET }, { wxT("wxSRC_INVERT"), wxSRC_INVERT }, { wxT("wxXOR"), wxXOR }, }; void MyCanvas::DrawImages(wxDC& dc) { dc.DrawText(_T("original image"), 0, 0); dc.DrawBitmap(*gs_bmpNoMask, 0, 20, 0); dc.DrawText(_T("with colour mask"), 0, 100); dc.DrawBitmap(*gs_bmpWithColMask, 0, 120, true); dc.DrawText(_T("the mask image"), 0, 200); dc.DrawBitmap(*gs_bmpMask, 0, 220, 0); dc.DrawText(_T("masked image"), 0, 300); dc.DrawBitmap(*gs_bmpWithMask, 0, 320, true); int cx = gs_bmpWithColMask->GetWidth(), cy = gs_bmpWithColMask->GetHeight(); wxMemoryDC memDC; for ( size_t n = 0; n < WXSIZEOF(rasterOperations); n++ ) { wxCoord x = 120 + 150*(n%4), y = 20 + 100*(n/4); dc.DrawText(rasterOperations[n].name, x, y - 20); memDC.SelectObject(*gs_bmpWithColMask); dc.Blit(x, y, cx, cy, &memDC, 0, 0, rasterOperations[n].rop, true); } } void MyCanvas::DrawWithLogicalOps(wxDC& dc) { static const wxCoord w = 60; static const wxCoord h = 60; // reuse the text colour here dc.SetPen(wxPen(m_owner->m_colourForeground, 1, wxSOLID)); dc.SetBrush(*wxTRANSPARENT_BRUSH); size_t n; for ( n = 0; n < WXSIZEOF(rasterOperations); n++ ) { wxCoord x = 20 + 150*(n%4), y = 20 + 100*(n/4); dc.DrawText(rasterOperations[n].name, x, y - 20); dc.SetLogicalFunction(rasterOperations[n].rop); dc.DrawRectangle(x, y, w, h); dc.DrawLine(x, y, x + w, y + h); dc.DrawLine(x + w, y, x, y + h); } // now some filled rectangles dc.SetBrush(wxBrush(m_owner->m_colourForeground, wxSOLID)); for ( n = 0; n < WXSIZEOF(rasterOperations); n++ ) { wxCoord x = 20 + 150*(n%4), y = 500 + 100*(n/4); dc.DrawText(rasterOperations[n].name, x, y - 20); dc.SetLogicalFunction(rasterOperations[n].rop); dc.DrawRectangle(x, y, w, h); } } void MyCanvas::DrawCircles(wxDC& dc) { int x = 100, y = 100, r = 20; dc.DrawText(_T("Some circles"), 0, y); dc.DrawCircle(x, y, r); dc.DrawCircle(x + 2*r, y, r); dc.DrawCircle(x + 4*r, y, r); y += 2*r; dc.DrawText(_T("And ellipses"), 0, y); dc.DrawEllipse(x - r, y, 2*r, r); dc.DrawEllipse(x + r, y, 2*r, r); dc.DrawEllipse(x + 3*r, y, 2*r, r); y += 2*r; dc.DrawText(_T("And arcs"), 0, y); dc.DrawArc(x - r, y, x + r, y, x, y); dc.DrawArc(x + 4*r, y, x + 2*r, y, x + 3*r, y); dc.DrawArc(x + 5*r, y, x + 5*r, y, x + 6*r, y); y += 2*r; dc.DrawEllipticArc(x - r, y, 2*r, r, 0, 90); dc.DrawEllipticArc(x + r, y, 2*r, r, 90, 180); dc.DrawEllipticArc(x + 3*r, y, 2*r, r, 180, 270); dc.DrawEllipticArc(x + 5*r, y, 2*r, r, 270, 360); } void MyCanvas::DrawRegions(wxDC& dc) { dc.DrawText(_T("You should see a red rect partly covered by a cyan one ") _T("on the left"), 10, 5); dc.DrawText(_T("and 5 smileys from which 4 are partially clipped on the right"), 10, 5 + dc.GetCharHeight()); dc.DrawText(_T("The second copy should be identical but right part of it ") _T("should be offset by 10 pixels."), 10, 5 + 2*dc.GetCharHeight()); DrawRegionsHelper(dc, 10, true); DrawRegionsHelper(dc, 350, false); } void MyCanvas::DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime) { wxCoord y = 100; dc.DestroyClippingRegion(); dc.SetBrush( *wxWHITE_BRUSH ); dc.SetPen( *wxTRANSPARENT_PEN ); dc.DrawRectangle( x, y, 310, 310 ); dc.SetClippingRegion( x + 10, y + 10, 100, 270 ); dc.SetBrush( *wxRED_BRUSH ); dc.DrawRectangle( x, y, 310, 310 ); dc.SetClippingRegion( x + 10, y + 10, 100, 100 ); dc.SetBrush( *wxCYAN_BRUSH ); dc.DrawRectangle( x, y, 310, 310 ); dc.DestroyClippingRegion(); wxRegion region(x + 110, y + 20, 100, 270); #if !defined(__WXMOTIF__) && !defined(__WXMAC__) if ( !firstTime ) region.Offset(10, 10); #endif dc.SetClippingRegion(region); dc.SetBrush( *wxGREY_BRUSH ); dc.DrawRectangle( x, y, 310, 310 ); if (m_smile_bmp.Ok()) { dc.DrawBitmap( m_smile_bmp, x + 150, y + 150, true ); dc.DrawBitmap( m_smile_bmp, x + 130, y + 10, true ); dc.DrawBitmap( m_smile_bmp, x + 130, y + 280, true ); dc.DrawBitmap( m_smile_bmp, x + 100, y + 70, true ); dc.DrawBitmap( m_smile_bmp, x + 200, y + 70, true ); } } void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event)) { wxPaintDC dc(this); PrepareDC(dc); m_owner->PrepareDC(dc); dc.SetBackgroundMode( m_owner->m_backgroundMode ); if ( m_owner->m_backgroundBrush.Ok() ) dc.SetBackground( m_owner->m_backgroundBrush ); if ( m_owner->m_colourForeground.Ok() ) dc.SetTextForeground( m_owner->m_colourForeground ); if ( m_owner->m_colourBackground.Ok() ) dc.SetTextBackground( m_owner->m_colourBackground ); if ( m_owner->m_textureBackground) { if ( ! m_owner->m_backgroundBrush.Ok() ) { wxBrush b(wxColour(0,128,0), wxSOLID); dc.SetBackground(b); } } if ( m_clip ) dc.SetClippingRegion(100, 100, 100, 100); dc.Clear(); if ( m_owner->m_textureBackground ) { dc.SetPen(*wxMEDIUM_GREY_PEN); for ( int i = 0; i < 200; i++ ) dc.DrawLine(0, i*10, i*10, 0); } switch ( m_show ) { case Show_Default: DrawDefault(dc); break; case Show_Circles: DrawCircles(dc); break; case Show_Regions: DrawRegions(dc); break; case Show_Text: DrawText(dc); break; case Show_Lines: DrawTestLines( 0, 100, 0, dc ); DrawTestLines( 0, 320, 1, dc ); DrawTestLines( 0, 540, 2, dc ); DrawTestLines( 0, 760, 6, dc ); break; case Show_Brushes: DrawTestBrushes(dc); break; case Show_Polygons: DrawTestPoly(dc); break; case Show_Mask: DrawImages(dc); break; case Show_Ops: DrawWithLogicalOps(dc); break; } } void MyCanvas::OnMouseMove(wxMouseEvent &event) { wxClientDC dc(this); PrepareDC(dc); m_owner->PrepareDC(dc); wxPoint pos = event.GetPosition(); long x = dc.DeviceToLogicalX( pos.x ); long y = dc.DeviceToLogicalY( pos.y ); wxString str; str.Printf( wxT("Current mouse position: %d,%d"), (int)x, (int)y ); m_owner->SetStatusText( str ); } // ---------------------------------------------------------------------------- // MyFrame // ---------------------------------------------------------------------------- // the event tables connect the wxWidgets events with the functions (event // handlers) which process them. It can be also done at run-time, but for the // simple menu events like this the static method is much simpler. BEGIN_EVENT_TABLE(MyFrame, wxFrame) EVT_MENU (File_Quit, MyFrame::OnQuit) EVT_MENU (File_About, MyFrame::OnAbout) EVT_MENU (File_Clip, MyFrame::OnClip) EVT_MENU_RANGE(MenuShow_First, MenuShow_Last, MyFrame::OnShow) EVT_MENU_RANGE(MenuOption_First, MenuOption_Last, MyFrame::OnOption) END_EVENT_TABLE() // frame constructor MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size) : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size, wxDEFAULT_FRAME_STYLE | wxNO_FULL_REPAINT_ON_RESIZE) { // set the frame icon SetIcon(wxICON(mondrian)); wxMenu *menuFile = new wxMenu; menuFile->Append(File_ShowDefault, _T("&Default screen\tF1")); menuFile->Append(File_ShowText, _T("&Text screen\tF2")); menuFile->Append(File_ShowLines, _T("&Lines screen\tF3")); menuFile->Append(File_ShowBrushes, _T("&Brushes screen\tF4")); menuFile->Append(File_ShowPolygons, _T("&Polygons screen\tF5")); menuFile->Append(File_ShowMask, _T("&Mask screen\tF6")); menuFile->Append(File_ShowOps, _T("&ROP screen\tF7")); menuFile->Append(File_ShowRegions, _T("Re&gions screen\tF8")); menuFile->Append(File_ShowCircles, _T("&Circles screen\tF9")); menuFile->AppendSeparator(); menuFile->AppendCheckItem(File_Clip, _T("&Clip\tCtrl-C"), _T("Clip/unclip drawing")); menuFile->AppendSeparator(); menuFile->Append(File_About, _T("&About...\tCtrl-A"), _T("Show about dialog")); menuFile->AppendSeparator(); menuFile->Append(File_Quit, _T("E&xit\tAlt-X"), _T("Quit this program")); wxMenu *menuMapMode = new wxMenu; menuMapMode->Append( MapMode_Text, _T("&TEXT map mode") ); menuMapMode->Append( MapMode_Lometric, _T("&LOMETRIC map mode") ); menuMapMode->Append( MapMode_Twips, _T("T&WIPS map mode") ); menuMapMode->Append( MapMode_Points, _T("&POINTS map mode") ); menuMapMode->Append( MapMode_Metric, _T("&METRIC map mode") ); wxMenu *menuUserScale = new wxMenu; menuUserScale->Append( UserScale_StretchHoriz, _T("Stretch &horizontally\tCtrl-H") ); menuUserScale->Append( UserScale_ShrinkHoriz, _T("Shrin&k horizontally\tCtrl-G") ); menuUserScale->Append( UserScale_StretchVertic, _T("Stretch &vertically\tCtrl-V") ); menuUserScale->Append( UserScale_ShrinkVertic, _T("&Shrink vertically\tCtrl-W") ); menuUserScale->AppendSeparator(); menuUserScale->Append( UserScale_Restore, _T("&Restore to normal\tCtrl-0") ); wxMenu *menuAxis = new wxMenu; menuAxis->Append( AxisMirror_Horiz, _T("Mirror horizontally\tCtrl-M"), _T(""), true ); menuAxis->Append( AxisMirror_Vertic, _T("Mirror vertically\tCtrl-N"), _T(""), true ); wxMenu *menuLogical = new wxMenu; menuLogical->Append( LogicalOrigin_MoveDown, _T("Move &down\tCtrl-D") ); menuLogical->Append( LogicalOrigin_MoveUp, _T("Move &up\tCtrl-U") ); menuLogical->Append( LogicalOrigin_MoveLeft, _T("Move &right\tCtrl-L") ); menuLogical->Append( LogicalOrigin_MoveRight, _T("Move &left\tCtrl-R") ); menuLogical->AppendSeparator(); menuLogical->Append( LogicalOrigin_Set, _T("Set to (&100, 100)\tShift-Ctrl-1") ); menuLogical->Append( LogicalOrigin_Restore, _T("&Restore to normal\tShift-Ctrl-0") ); wxMenu *menuColour = new wxMenu; menuColour->Append( Colour_TextForeground, _T("Text &foreground...") ); menuColour->Append( Colour_TextBackground, _T("Text &background...") ); menuColour->Append( Colour_Background, _T("Background &colour...") ); menuColour->Append( Colour_BackgroundMode, _T("&Opaque/transparent\tCtrl-B"), _T(""), true ); menuColour->Append( Colour_TextureBackgound, _T("Draw textured back&ground\tCtrl-T"), _T(""), true); // now append the freshly created menu to the menu bar... wxMenuBar *menuBar = new wxMenuBar; menuBar->Append(menuFile, _T("&File")); menuBar->Append(menuMapMode, _T("&Mode")); menuBar->Append(menuUserScale, _T("&Scale")); menuBar->Append(menuAxis, _T("&Axis")); menuBar->Append(menuLogical, _T("&Origin")); menuBar->Append(menuColour, _T("&Colours")); // ... and attach this menu bar to the frame SetMenuBar(menuBar); // create a status bar just for fun (by default with 1 pane only) CreateStatusBar(2); SetStatusText(_T("Welcome to wxWidgets!")); m_mapMode = wxMM_TEXT; m_xUserScale = 1.0; m_yUserScale = 1.0; m_xLogicalOrigin = 0; m_yLogicalOrigin = 0; m_xAxisReversed = m_yAxisReversed = false; m_backgroundMode = wxSOLID; m_colourForeground = *wxRED; m_colourBackground = *wxBLUE; m_textureBackground = false; m_canvas = new MyCanvas( this ); m_canvas->SetScrollbars( 10, 10, 100, 240 ); } // event handlers void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event)) { // true is to force the frame to close Close(true); } void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event)) { wxString msg; msg.Printf( wxT("This is the about dialog of the drawing sample.\n") wxT("This sample tests various primitive drawing functions\n") wxT("(without any attempts to prevent flicker).\n") wxT("Copyright (c) Robert Roebling 1999") ); wxMessageBox(msg, _T("About Drawing"), wxOK | wxICON_INFORMATION, this); } void MyFrame::OnClip(wxCommandEvent& event) { m_canvas->Clip(event.IsChecked()); } void MyFrame::OnShow(wxCommandEvent& event) { m_canvas->ToShow((ScreenToShow)(event.GetId() - MenuShow_First)); } void MyFrame::OnOption(wxCommandEvent& event) { switch (event.GetId()) { case MapMode_Text: m_mapMode = wxMM_TEXT; break; case MapMode_Lometric: m_mapMode = wxMM_LOMETRIC; break; case MapMode_Twips: m_mapMode = wxMM_TWIPS; break; case MapMode_Points: m_mapMode = wxMM_POINTS; break; case MapMode_Metric: m_mapMode = wxMM_METRIC; break; case LogicalOrigin_MoveDown: m_yLogicalOrigin += 10; break; case LogicalOrigin_MoveUp: m_yLogicalOrigin -= 10; break; case LogicalOrigin_MoveLeft: m_xLogicalOrigin += 10; break; case LogicalOrigin_MoveRight: m_xLogicalOrigin -= 10; break; case LogicalOrigin_Set: m_xLogicalOrigin = m_yLogicalOrigin = -100; break; case LogicalOrigin_Restore: m_xLogicalOrigin = m_yLogicalOrigin = 0; break; case UserScale_StretchHoriz: m_xUserScale *= 1.10; break; case UserScale_ShrinkHoriz: m_xUserScale /= 1.10; break; case UserScale_StretchVertic: m_yUserScale *= 1.10; break; case UserScale_ShrinkVertic: m_yUserScale /= 1.10; break; case UserScale_Restore: m_xUserScale = m_yUserScale = 1.0; break; case AxisMirror_Vertic: m_yAxisReversed = !m_yAxisReversed; break; case AxisMirror_Horiz: m_xAxisReversed = !m_xAxisReversed; break; case Colour_TextForeground: m_colourForeground = SelectColour(); break; case Colour_TextBackground: m_colourBackground = SelectColour(); break; case Colour_Background: { wxColour col = SelectColour(); if ( col.Ok() ) { m_backgroundBrush.SetColour(col); } } break; case Colour_BackgroundMode: m_backgroundMode = m_backgroundMode == wxSOLID ? wxTRANSPARENT : wxSOLID; break; case Colour_TextureBackgound: m_textureBackground = ! m_textureBackground; break; default: // skip Refresh() return; } m_canvas->Refresh(); } void MyFrame::PrepareDC(wxDC& dc) { dc.SetLogicalOrigin( m_xLogicalOrigin, m_yLogicalOrigin ); dc.SetAxisOrientation( !m_xAxisReversed, m_yAxisReversed ); dc.SetUserScale( m_xUserScale, m_yUserScale ); dc.SetMapMode( m_mapMode ); } wxColour MyFrame::SelectColour() { wxColour col; wxColourData data; wxColourDialog dialog(this, &data); if ( dialog.ShowModal() == wxID_OK ) { col = dialog.GetColourData().GetColour(); } return col; }