MFC和GDI+一起使用
VS2010，新建MFC项目，在头文件stdafx.h中添加：
1 #include <gdiplus.h>
2 using namespace Gdiplus; 3 #pragma comment (lib,"Gdiplus.lib")
定义类的变量 ULONG_PTR gdiplusToken;
在BOOL CGDALDesktopApp::InitInstance()中添加：
1 GdiplusStartupInput gdiplusStartupInput;
2 GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
在ExitInstance()中添加：
1 int CGDALDesktopApp::ExitInstance() 2 { 3 //TODO: 处理可能已添加的附加资源
4 AfxOleTerm(FALSE); 5 GdiplusShutdown(gdiplusToken); 6 return CWinAppEx::ExitInstance(); 7 }
添加绘制的代码：
1 void CGDALDesktopView::OnDraw(CDC* pDC) 2 { 3 CGDALDesktopDoc* pDoc = GetDocument(); 4 ASSERT_VALID(pDoc); 5 if (!pDoc) 6 return; 7
8 //Graphics graphics(*pDC);
9 Graphics g( pDC->GetSafeHdc() ); 10 //建立画笔
11 Pen pen_black(Color::Black); 12 Pen pen_white(Color::White); 13 //使用画笔绘制图形
14 pen_black.SetWidth(6); //设置画笔宽度
15 pen_black.SetStartCap(LineCapRoundAnchor); //设置开始笔帽
16 pen_black.SetEndCap(LineCapArrowAnchor); //设置结束笔帽
17 g.DrawLine(&pen_black, 10, 10, 100, 10); 18 Rect rect1(0,0, 150, 80); 19 Rect rect2(10 + 170, 200, 150, 80); 20 Rect rect3(10 + 170*2, 200, 150, 80); 21 Rect rect4(10 + 170*3, 200, 150, 80); 22 g.DrawRectangle(&pen_black, rect1); 23 g.DrawRectangle(&pen_black, rect2); 24 g.DrawRectangle(&pen_black, rect3); 25 g.DrawRectangle(&pen_black, rect4); 26 //建立画刷 27 //实色画刷
28 SolidBrush brush_black(Color::Black); 29 SolidBrush brush_white(Color::White); 30 SolidBrush brush_blue(Color::Blue); 31 g.FillRectangle(&brush_blue, rect1); 32 //网格画刷
33 HatchBrush brush_hatch( HatchStyleDiagonalBrick, Color(255, 255, 0, 0), Color(30, 0, 255, 0)); 34 g.FillRectangle(&brush_hatch, rect2); 35 //贴图画刷
36 Image image(L"res\\qq.gif"); 37 TextureBrush brush_texture(&image); 38 g.FillRectangle(&brush_texture, rect3); 39 //渐变画刷(线形渐变)
40 LinearGradientBrush brush_gradient_line( Point(0, 0), Point(10, 10),Color(255, 255, 0, 0), Color(255, 0, 0, 255)); 41 g.FillRectangle(&brush_gradient_line, rect4); 42 //渐变画刷(路径渐变) 43 //PathGradientBrush...................... 44 //贴图画笔
45 Pen pen_texture(&brush_texture, 30); 46 g.DrawEllipse(&pen_texture, 600, 10, 150 ,150); 47 //启动抗锯齿功能
48 pen_black.SetWidth(1); 49 g.SetSmoothingMode(SmoothingModeAntiAlias); 50 g.DrawLine(&pen_black, 150, 5, 350 , 20); 51 //绘制图像 52 // 不进行缩放
53 g.DrawImage(&image, 10,50); 54 // 使用低质量的插补算法
55 g.SetInterpolationMode(InterpolationModeNearestNeighbor); 56 g.DrawImage( &image, Rect(100,50, 100, 100)); 57 // 使用中等质量的插补算法
58 g.SetInterpolationMode(InterpolationModeHighQualityBilinear); 59 g.DrawImage( &image, Rect(250,50, 100, 100)); 60 // 使用高质量的插补算法
61 g.SetInterpolationMode(InterpolationModeHighQualityBicubic); 62 g.DrawImage( &image, Rect(400,50, 100, 100)); 63 //路径
64 GraphicsPath path1; 65 path1.AddLine(300, 350, 500 ,350); 66 path1.AddArc(300, 300, 200, 100, 0, -180); 67 g.DrawPath(&pen_black, &path1); 68 g.FillPath(&brush_black, &path1); 69 //区域
70 GraphicsPath pathOuter; 71 pathOuter.AddRectangle(Rect(100, 320, 150 ,150)); 72 GraphicsPath pathInner; 73 pathInner.AddEllipse(Rect(150, 360, 90 ,80)); 74 Region rgn(&pathOuter); 75 rgn.Exclude(&pathInner); 76 g.FillRegion(&brush_blue, &rgn); 77 // TODO: 在此处为本机数据添加绘制代码
78 }