MFC和GDI+一起使用

时间：2022-05-20 11:03:17

VS2010，新建MFC项目，在头文件stdafx.h中添加：

 #include <gdiplus.h>

 using namespace Gdiplus;

 #pragma comment (lib,"Gdiplus.lib")

定义类的变量 ULONG_PTR   gdiplusToken;

在BOOL CGDALDesktopApp::InitInstance()中添加：

 GdiplusStartupInput gdiplusStartupInput;
2 GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

在ExitInstance()中添加：

 int CGDALDesktopApp::ExitInstance()

 {

     //TODO: 处理可能已添加的附加资源

     AfxOleTerm(FALSE);

      GdiplusShutdown(gdiplusToken);

     return CWinAppEx::ExitInstance();

 }

添加绘制的代码：

 void CGDALDesktopView::OnDraw(CDC* pDC)

 {

     CGDALDesktopDoc* pDoc = GetDocument();

     ASSERT_VALID(pDoc);

     if (!pDoc)

         return;

     //Graphics graphics(*pDC);

         Graphics g( pDC->GetSafeHdc() );

     //建立画笔

      Pen pen_black(Color::Black);

      Pen pen_white(Color::White);

     //使用画笔绘制图形

     pen_black.SetWidth(); //设置画笔宽度

     pen_black.SetStartCap(LineCapRoundAnchor); //设置开始笔帽

     pen_black.SetEndCap(LineCapArrowAnchor); //设置结束笔帽

     g.DrawLine(&pen_black, , , , );

     Rect rect1(,, , );

     Rect rect2( + , , , );

     Rect rect3( + *, , , );

     Rect rect4( + *, , , );

     g.DrawRectangle(&pen_black, rect1);

      g.DrawRectangle(&pen_black, rect2);

      g.DrawRectangle(&pen_black, rect3);

      g.DrawRectangle(&pen_black, rect4);

     //建立画刷

      //实色画刷

     SolidBrush brush_black(Color::Black);

      SolidBrush brush_white(Color::White);

      SolidBrush brush_blue(Color::Blue);

      g.FillRectangle(&brush_blue, rect1);

      //网格画刷

      HatchBrush brush_hatch( HatchStyleDiagonalBrick, Color(, , , ), Color(, , , ));

     g.FillRectangle(&brush_hatch, rect2);

      //贴图画刷

      Image image(L"res\\qq.gif");

      TextureBrush brush_texture(&image);

      g.FillRectangle(&brush_texture, rect3);

      //渐变画刷(线形渐变)

      LinearGradientBrush brush_gradient_line( Point(, ), Point(, ),Color(, , , ), Color(, , , ));

      g.FillRectangle(&brush_gradient_line, rect4);

      //渐变画刷(路径渐变)

      //PathGradientBrush......................

     //贴图画笔

      Pen pen_texture(&brush_texture, );

     g.DrawEllipse(&pen_texture, , ,  ,);

     //启动抗锯齿功能

      pen_black.SetWidth();

      g.SetSmoothingMode(SmoothingModeAntiAlias);

      g.DrawLine(&pen_black, , ,  , );

     //绘制图像

     // 不进行缩放

      g.DrawImage(&image, ,);

      // 使用低质量的插补算法

      g.SetInterpolationMode(InterpolationModeNearestNeighbor);

      g.DrawImage( &image, Rect(,, , ));

      // 使用中等质量的插补算法

      g.SetInterpolationMode(InterpolationModeHighQualityBilinear);

      g.DrawImage( &image, Rect(,, , ));

      // 使用高质量的插补算法

      g.SetInterpolationMode(InterpolationModeHighQualityBicubic);

      g.DrawImage( &image, Rect(,, , ));

     //路径

     GraphicsPath path1;

     path1.AddLine(, ,  ,);

     path1.AddArc(, , , , , -);

     g.DrawPath(&pen_black, &path1);

     g.FillPath(&brush_black, &path1);

     //区域

     GraphicsPath pathOuter;

     pathOuter.AddRectangle(Rect(, ,  ,));

     GraphicsPath pathInner;

      pathInner.AddEllipse(Rect(, ,  ,));

      Region rgn(&pathOuter);

      rgn.Exclude(&pathInner);

     g.FillRegion(&brush_blue, &rgn);

     // TODO: 在此处为本机数据添加绘制代码

 }

相关文章