X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/12534a36477bfa6c1eda7dc05a1e741000dc3ddf..1bd568fa44a864a4110b13e8e0d08f923e5fb4ff:/samples/drawing/drawing.cpp?ds=sidebyside diff --git a/samples/drawing/drawing.cpp b/samples/drawing/drawing.cpp index 3c21059947..120579cc40 100644 --- a/samples/drawing/drawing.cpp +++ b/samples/drawing/drawing.cpp @@ -70,12 +70,14 @@ 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 @@ -178,14 +180,21 @@ public: #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); @@ -227,12 +236,14 @@ 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, @@ -310,6 +321,7 @@ bool MyApp::LoadImages() wxPathList pathList; pathList.Add(_T(".")); pathList.Add(_T("..")); + pathList.Add(_T("../..")); wxString path = pathList.FindValidPath(_T("pat4.bmp")); if ( !path ) @@ -353,6 +365,9 @@ 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)); @@ -778,9 +793,9 @@ 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 ); @@ -832,7 +847,7 @@ 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); @@ -854,7 +869,15 @@ 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); + } } } @@ -895,40 +918,168 @@ 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, @@ -960,9 +1111,9 @@ 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); - + // same as above, just transparent brush - + dc.SetPen( *wxRED_PEN ); dc.SetBrush( *wxTRANSPARENT_BRUSH ); @@ -989,7 +1140,7 @@ 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) @@ -1082,32 +1233,81 @@ 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) @@ -1246,17 +1446,24 @@ 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: @@ -1321,6 +1528,7 @@ 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")); @@ -1329,6 +1537,9 @@ MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size) #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