X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e95c145cc87162726ad3f2b29f28cbdffb64ae7b..1bf629bd9a2c19d7298f8396b8f41817bb1d529d:/samples/drawing/drawing.cpp diff --git a/samples/drawing/drawing.cpp b/samples/drawing/drawing.cpp index 61df8bf913..9de12ad7af 100644 --- a/samples/drawing/drawing.cpp +++ b/samples/drawing/drawing.cpp @@ -33,6 +33,20 @@ #include "wx/colordlg.h" #include "wx/image.h" #include "wx/artprov.h" +#include "wx/dcgraph.h" + +#define wxTEST_GRAPHICS 1 + +#if wxTEST_GRAPHICS +#include "wx/graphics.h" +#if wxUSE_GRAPHICS_CONTEXT == 0 +#undef wxTEST_GRAPHICS +#define wxTEST_GRAPHICS 0 +#endif +#else +#undef wxUSE_GRAPHICS_CONTEXT +#define wxUSE_GRAPHICS_CONTEXT 0 +#endif // ---------------------------------------------------------------------------- // ressources @@ -57,10 +71,15 @@ enum ScreenToShow Show_Brushes, Show_Polygons, Show_Mask, + Show_Mask_Stretch, Show_Ops, Show_Regions, Show_Circles, Show_Splines, +#if wxUSE_GRAPHICS_CONTEXT + Show_Alpha, + Show_Graphics, +#endif Show_Gradient, Show_Max }; @@ -114,6 +133,9 @@ public: void OnQuit(wxCommandEvent& event); void OnAbout(wxCommandEvent& event); void OnClip(wxCommandEvent& event); +#if wxUSE_GRAPHICS_CONTEXT + void OnGraphicContext(wxCommandEvent& event); +#endif void OnShow(wxCommandEvent &event); void OnOption(wxCommandEvent &event); @@ -154,14 +176,27 @@ public: // set or remove the clipping region void Clip(bool clip) { m_clip = clip; Refresh(); } +#if wxUSE_GRAPHICS_CONTEXT + void UseGraphicContext(bool use) { m_useContext = use; Refresh(); } +#endif protected: + enum DrawMode + { + Draw_Normal, + Draw_Stretch + }; + 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 DrawImages(wxDC& dc, DrawMode mode); void DrawWithLogicalOps(wxDC& dc); +#if wxUSE_GRAPHICS_CONTEXT + void DrawAlpha(wxDC& dc); + void DrawGraphics(wxGraphicsContext* gc); +#endif void DrawRegions(wxDC& dc); void DrawCircles(wxDC& dc); void DrawSplines(wxDC& dc); @@ -177,6 +212,9 @@ private: wxBitmap m_smile_bmp; wxIcon m_std_icon; bool m_clip; +#if wxUSE_GRAPHICS_CONTEXT + bool m_useContext ; +#endif DECLARE_EVENT_TABLE() }; @@ -199,14 +237,22 @@ enum File_ShowBrushes, File_ShowPolygons, File_ShowMask, + File_ShowMaskStretch, File_ShowOps, File_ShowRegions, File_ShowCircles, File_ShowSplines, +#if wxUSE_GRAPHICS_CONTEXT + File_ShowAlpha, + File_ShowGraphics, +#endif File_ShowGradients, MenuShow_Last = File_ShowGradients, File_Clip, +#if wxUSE_GRAPHICS_CONTEXT + File_GraphicContext, +#endif MenuOption_First, @@ -276,6 +322,7 @@ bool MyApp::LoadImages() wxPathList pathList; pathList.Add(_T(".")); pathList.Add(_T("..")); + pathList.Add(_T("../..")); wxString path = pathList.FindValidPath(_T("pat4.bmp")); if ( !path ) @@ -319,6 +366,9 @@ bool MyApp::LoadImages() // `Main program' equivalent: the program execution "starts" here bool MyApp::OnInit() { + if ( !wxApp::OnInit() ) + return false; + // Create the main application window MyFrame *frame = new MyFrame(_T("Drawing sample"), wxPoint(50, 50), wxSize(550, 340)); @@ -384,6 +434,9 @@ MyCanvas::MyCanvas(MyFrame *parent) m_smile_bmp = wxBitmap(smile_xpm); m_std_icon = wxArtProvider::GetIcon(wxART_INFORMATION); m_clip = false; +#if wxUSE_GRAPHICS_CONTEXT + m_useContext = false; +#endif } void MyCanvas::DrawTestBrushes(wxDC& dc) @@ -741,9 +794,9 @@ void MyCanvas::DrawText(wxDC& dc) dc.DrawText( _T("This is Swiss 18pt text."), 110, 40 ); - long length; - long height; - long descent; + wxCoord length; + wxCoord height; + wxCoord 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 ); @@ -795,7 +848,7 @@ static const struct { wxT("wxXOR"), wxXOR }, }; -void MyCanvas::DrawImages(wxDC& dc) +void MyCanvas::DrawImages(wxDC& dc, DrawMode mode) { dc.DrawText(_T("original image"), 0, 0); dc.DrawBitmap(*gs_bmpNoMask, 0, 20, 0); @@ -817,7 +870,15 @@ void MyCanvas::DrawImages(wxDC& dc) 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); + if ( mode == Draw_Stretch ) + { + dc.StretchBlit(x, y, cx, cy, &memDC, 0, 0, cx/2, cy/2, + rasterOperations[n].rop, true); + } + else + { + dc.Blit(x, y, cx, cy, &memDC, 0, 0, rasterOperations[n].rop, true); + } } } @@ -857,12 +918,207 @@ void MyCanvas::DrawWithLogicalOps(wxDC& dc) } } +#if wxUSE_GRAPHICS_CONTEXT +#ifdef __WXGTK20__ +void MyCanvas::DrawAlpha(wxDC& no_dc) +#else +void MyCanvas::DrawAlpha(wxDC& dc) +#endif +{ +#ifdef __WXGTK__ + wxGCDC dc( this ); + PrepareDC( dc ); +#endif + + wxDouble margin = 20 ; + wxDouble width = 180 ; + wxDouble radius = 30 ; + + dc.SetPen( wxPen( wxColour( 128, 0, 0, 255 ),12, wxSOLID)); + dc.SetBrush( wxBrush( wxColour( 255, 0, 0, 255),wxSOLID)); + + wxRect r(margin,margin+width*0.66,width,width) ; + + dc.DrawRoundedRectangle( r.x, r.y, r.width, r.width, radius ) ; + + dc.SetPen( wxPen( wxColour( 0, 0, 128, 255 ),12, wxSOLID)); + dc.SetBrush( wxBrush( wxColour( 0, 0, 255, 255),wxSOLID)); + + r.Offset( width * 0.8 , - width * 0.66 ) ; + + dc.DrawRoundedRectangle( r.x, r.y, r.width, r.width, radius ) ; + + dc.SetPen( wxPen( wxColour( 128, 128, 0, 255 ),12, wxSOLID)); + dc.SetBrush( wxBrush( wxColour( 192, 192, 0, 255),wxSOLID)); + + r.Offset( width * 0.8 , width *0.5 ) ; + + dc.DrawRoundedRectangle( r.x, r.y, r.width, r.width, radius ) ; + + dc.SetPen( *wxTRANSPARENT_PEN ) ; + dc.SetBrush( wxBrush( wxColour(255,255,128,128) ) ); + dc.DrawRoundedRectangle( 0 , margin + width / 2 , width * 3 , 100 , radius) ; + + dc.SetTextForeground( wxColour(255,255,0,128) ); + dc.SetFont( wxFont( 40, wxFONTFAMILY_SWISS, wxFONTSTYLE_ITALIC, wxFONTWEIGHT_NORMAL ) ); + dc.DrawText( wxT("Hello!"), 120, 80 ); +} + +#endif + +#if wxUSE_GRAPHICS_CONTEXT + +const int BASE = 80.0; +const int BASE2 = BASE/2; +const int BASE4 = BASE/4; + +static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; } + + +// modeled along Robin Dunn's GraphicsContext.py sample + +void MyCanvas::DrawGraphics(wxGraphicsContext* gc) +{ + wxFont font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT); + gc->SetFont(font,*wxBLACK); + + // make a path that contains a circle and some lines, centered at 0,0 + wxGraphicsPath path = gc->CreatePath() ; + path.AddCircle( 0, 0, BASE2 ); + path.MoveToPoint(0, -BASE2); + path.AddLineToPoint(0, BASE2); + path.MoveToPoint(-BASE2, 0); + path.AddLineToPoint(BASE2, 0); + path.CloseSubpath(); + path.AddRectangle(-BASE4, -BASE4/2, BASE2, BASE4); + + // Now use that path to demonstrate various capbilites of the grpahics context + gc->PushState(); // save current translation/scale/other state + gc->Translate(60, 75); // reposition the context origin + + gc->SetPen(wxPen("navy", 1)); + gc->SetBrush(wxBrush("pink")); + + for( int i = 0 ; i < 3 ; ++i ) + { + wxString label; + switch( i ) + { + case 0 : + label = "StrokePath"; + break; + case 1 : + label = "FillPath"; + break; + case 2 : + label = "DrawPath"; + break; + } + wxDouble w, h; + gc->GetTextExtent(label, &w, &h, NULL, NULL); + gc->DrawText(label, -w/2, -BASE2-h-4); + switch( i ) + { + case 0 : + gc->StrokePath(path); + break; + case 1 : + gc->FillPath(path); + break; + case 2 : + gc->DrawPath(path); + break; + } + gc->Translate(2*BASE, 0); + } + + gc->PopState(); // restore saved state + gc->PushState(); // save it again + gc->Translate(60, 200); // offset to the lower part of the window + + gc->DrawText("Scale", 0, -BASE2); + gc->Translate(0, 20); + + gc->SetBrush(wxBrush(wxColour(178, 34, 34, 128)));// 128 == half transparent + for( int i = 0 ; i < 8 ; ++i ) + { + gc->Scale(1.08, 1.08); // increase scale by 8% + gc->Translate(5,5); + gc->DrawPath(path); + } + + gc->PopState(); // restore saved state + gc->PushState(); // save it again + gc->Translate(400, 200); + + gc->DrawText("Rotate", 0, -BASE2); + + // Move the origin over to the next location + gc->Translate(0, 75); + + // draw our path again, rotating it about the central point, + // and changing colors as we go + for ( int angle = 0 ; angle < 360 ; angle += 30 ) + { + gc->PushState(); // save this new current state so we can + // pop back to it at the end of the loop + wxImage::RGBValue val = wxImage::HSVtoRGB(wxImage::HSVValue(float(angle)/360, 1, 1)); + gc->SetBrush(wxBrush(wxColour(val.red, val.green, val.blue, 64))); + gc->SetPen(wxPen(wxColour(val.red, val.green, val.blue, 128))); + + // use translate to artfully reposition each drawn path + gc->Translate(1.5 * BASE2 * cos(DegToRad(angle)), + 1.5 * BASE2 * sin(DegToRad(angle))); + + // use Rotate to rotate the path + gc->Rotate(DegToRad(angle)); + + // now draw it + gc->DrawPath(path); + gc->PopState(); + } + gc->PopState(); +} +#endif + void MyCanvas::DrawCircles(wxDC& dc) { int x = 100, y = 100, r = 20; + dc.SetPen( *wxRED_PEN ); + dc.SetBrush( *wxGREEN_BRUSH ); + + 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); + + // same as above, just transparent brush + + dc.SetPen( *wxRED_PEN ); + dc.SetBrush( *wxTRANSPARENT_BRUSH ); + + y += 2*r; dc.DrawText(_T("Some circles"), 0, y); dc.DrawCircle(x, y, r); dc.DrawCircle(x + 2*r, y, r); @@ -885,6 +1141,7 @@ void MyCanvas::DrawCircles(wxDC& dc) 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::DrawSplines(wxDC& dc) @@ -977,32 +1234,81 @@ void MyCanvas::DrawSplines(wxDC& dc) void MyCanvas::DrawGradients(wxDC& dc) { + static const int TEXT_HEIGHT = 15; + // LHS: linear - wxRect r(10, 10, 100, 100); + wxRect r(10, 10, 50, 50); + dc.DrawText(_T("wxRIGHT"), r.x, r.y); + r.Offset(0, TEXT_HEIGHT); dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxRIGHT); - r.Offset(0, 110); + r.Offset(0, r.height + 10); + dc.DrawText(_T("wxLEFT"), r.x, r.y); + r.Offset(0, TEXT_HEIGHT); dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxLEFT); - r.Offset(0, 110); + r.Offset(0, r.height + 10); + dc.DrawText(_T("wxDOWN"), r.x, r.y); + r.Offset(0, TEXT_HEIGHT); dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxDOWN); - r.Offset(0, 110); + r.Offset(0, r.height + 10); + dc.DrawText(_T("wxUP"), r.x, r.y); + r.Offset(0, TEXT_HEIGHT); dc.GradientFillLinear(r, *wxWHITE, *wxBLUE, wxUP); // RHS: concentric - r = wxRect(200, 10, 100, 100); + r = wxRect(200, 10, 50, 50); + dc.DrawText(_T("Blue inside"), r.x, r.y); + r.Offset(0, TEXT_HEIGHT); dc.GradientFillConcentric(r, *wxBLUE, *wxWHITE); - r.Offset(0, 110); + r.Offset(0, r.height + 10); + dc.DrawText(_T("White inside"), r.x, r.y); + r.Offset(0, TEXT_HEIGHT); dc.GradientFillConcentric(r, *wxWHITE, *wxBLUE); - r.Offset(0, 110); + r.Offset(0, r.height + 10); + dc.DrawText(_T("Blue in top left corner"), r.x, r.y); + r.Offset(0, TEXT_HEIGHT); dc.GradientFillConcentric(r, *wxBLUE, *wxWHITE, wxPoint(0, 0)); - r.Offset(0, 110); - dc.GradientFillConcentric(r, *wxBLUE, *wxWHITE, wxPoint(100, 100)); + r.Offset(0, r.height + 10); + dc.DrawText(_T("Blue in bottom right corner"), r.x, r.y); + r.Offset(0, TEXT_HEIGHT); + dc.GradientFillConcentric(r, *wxBLUE, *wxWHITE, wxPoint(r.width, r.height)); + + // check that the area filled by the gradient is exactly the interior of + // the rectangle + r.x = 350; + r.y = 30; + dc.DrawText("The interior should be filled but", r.x, r.y); + r.y += 15; + dc.DrawText(" the red border should remain visible:", r.x, r.y); + r.y += 15; + + r.width = + r.height = 50; + wxRect r2 = r; + r2.x += 60; + wxRect r3 = r; + r3.y += 60; + wxRect r4 = r2; + r4.y += 60; + dc.SetPen(wxPen(wxColour(255, 0, 0))); + dc.DrawRectangle(r); + r.Deflate(1); + dc.GradientFillLinear(r, wxColour(0,255,0), wxColour(0,0,0), wxNORTH); + dc.DrawRectangle(r2); + r2.Deflate(1); + dc.GradientFillLinear(r2, wxColour(0,0,0), wxColour(0,255,0), wxSOUTH); + dc.DrawRectangle(r3); + r3.Deflate(1); + dc.GradientFillLinear(r3, wxColour(0,255,0), wxColour(0,0,0), wxEAST); + dc.DrawRectangle(r4); + r4.Deflate(1); + dc.GradientFillLinear(r4, wxColour(0,0,0), wxColour(0,255,0), wxWEST); } void MyCanvas::DrawRegions(wxDC& dc) @@ -1062,7 +1368,15 @@ void MyCanvas::DrawRegionsHelper(wxDC& dc, wxCoord x, bool firstTime) void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event)) { - wxPaintDC dc(this); + wxPaintDC pdc(this); + +#if wxUSE_GRAPHICS_CONTEXT + wxGCDC gdc( pdc ) ; + wxDC &dc = m_useContext ? (wxDC&) gdc : (wxDC&) pdc ; +#else + wxDC &dc = pdc ; +#endif + PrepareDC(dc); m_owner->PrepareDC(dc); @@ -1133,13 +1447,26 @@ void MyCanvas::OnPaint(wxPaintEvent &WXUNUSED(event)) break; case Show_Mask: - DrawImages(dc); + DrawImages(dc, Draw_Normal); + break; + + case Show_Mask_Stretch: + DrawImages(dc, Draw_Stretch); break; case Show_Ops: DrawWithLogicalOps(dc); break; +#if wxUSE_GRAPHICS_CONTEXT + case Show_Alpha: + DrawAlpha(dc); + break; + case Show_Graphics: + DrawGraphics(gdc.GetGraphicsContext()); + break; +#endif + case Show_Gradient: DrawGradients(dc); break; @@ -1178,6 +1505,9 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame) EVT_MENU (File_Quit, MyFrame::OnQuit) EVT_MENU (File_About, MyFrame::OnAbout) EVT_MENU (File_Clip, MyFrame::OnClip) +#if wxUSE_GRAPHICS_CONTEXT + EVT_MENU (File_GraphicContext, MyFrame::OnGraphicContext) +#endif EVT_MENU_RANGE(MenuShow_First, MenuShow_Last, MyFrame::OnShow) @@ -1199,13 +1529,23 @@ MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size) 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_ShowMaskStretch, _T("1/&2 scaled mask\tShift-F6")); 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")); +#if wxUSE_GRAPHICS_CONTEXT + menuFile->Append(File_ShowAlpha, _T("&Alpha screen\tF10")); +#endif menuFile->Append(File_ShowSplines, _T("&Splines screen\tF11")); menuFile->Append(File_ShowGradients, _T("&Gradients screen\tF12")); +#if wxUSE_GRAPHICS_CONTEXT + menuFile->Append(File_ShowGraphics, _T("&Graphics screen\tF13")); +#endif menuFile->AppendSeparator(); menuFile->AppendCheckItem(File_Clip, _T("&Clip\tCtrl-C"), _T("Clip/unclip drawing")); +#if wxUSE_GRAPHICS_CONTEXT + menuFile->AppendCheckItem(File_GraphicContext, _T("&Use GraphicContext\tCtrl-Y"), _T("Use GraphicContext")); +#endif menuFile->AppendSeparator(); menuFile->Append(File_About, _T("&About...\tCtrl-A"), _T("Show about dialog")); menuFile->AppendSeparator(); @@ -1306,6 +1646,13 @@ void MyFrame::OnClip(wxCommandEvent& event) m_canvas->Clip(event.IsChecked()); } +#if wxUSE_GRAPHICS_CONTEXT +void MyFrame::OnGraphicContext(wxCommandEvent& event) +{ + m_canvas->UseGraphicContext(event.IsChecked()); +} +#endif + void MyFrame::OnShow(wxCommandEvent& event) { m_canvas->ToShow((ScreenToShow)(event.GetId() - MenuShow_First));