绘图小例子

void CMy05301View::OnDraw(CDC* pDC){    CMy05301Doc* pDoc = GetDocument();    ASSERT_VALID(pDoc);    if (!pDoc)        return;    pDC->SetMapMode(MM_ANISOTROPIC);    pDC->SetWindowExt(300, 300);    pDC->SetViewportExt(600, 600);    pDC->SetViewportOrg(0, 0);    // 画四个圆形，笔的样式不同    pDC->SelectStockObject(NULL_BRUSH);    CPen pen1, pen2, pen3, pen4;    pen1.CreatePen(PS_DASH, 0, RGB(255, 0, 0));    pDC->SelectObject(&pen1);    pDC->Ellipse(0, 0, 70, 70);    pen2.CreatePen(PS_DASHDOT, 0, RGB(0, 255, 0));    pDC->SelectObject(&pen2);    pDC->Ellipse(25, 0, 95, 70);    pen3.CreatePen(PS_DASHDOTDOT, 0, RGB(0, 0, 255));    pDC->SelectObject(&pen3);    pDC->Ellipse(0, 25, 70, 95);    pen4.CreatePen(PS_DOT, 0, RGB(0, 255, 255));    pDC->SelectObject(&pen4);    pDC->Ellipse(25, 25, 95, 95);    // 画6个圆角矩形，画刷的样式不同    pDC->SelectStockObject(BLACK_PEN);    pDC->RoundRect(120, 0, 165, 45, 10, 10);    pDC->SelectStockObject(DKGRAY_BRUSH);    pDC->RoundRect(165, 0, 210, 45, 10, 10);    pDC->SelectStockObject(GRAY_BRUSH);    pDC->RoundRect(210, 0, 255, 45, 10, 10);    pDC->SelectStockObject(HOLLOW_BRUSH);       // 虚画刷    pDC->RoundRect(120, 45, 165, 90, 10, 10);    pDC->SelectStockObject(LTGRAY_BRUSH);       // 亮灰色画刷    pDC->RoundRect(165, 45, 210, 90, 10, 10);    pDC->SelectStockObject(WHITE_BRUSH);    pDC->RoundRect(210, 45, 255, 90, 10, 10);    // 画6个矩形，画刷的阴影样式不同    pDC->SelectStockObject(BLACK_PEN);    CBrush brush1, brush2, brush3, brush4, brush5, brush6;    // 45度左上右下阴影线    brush1.CreateHatchBrush(HS_BDIAGONAL, RGB(200, 200, 200));    pDC->SelectObject(&brush1);    pDC->Rectangle(120, 90, 165, 135);    // 45度交叉线    brush2.CreateHatchBrush(HS_DIAGCROSS, RGB(200, 200, 200));    pDC->SelectObject(&brush2);    pDC->Rectangle(165, 90, 210, 135);    // 45度左下右上阴影线    brush3.CreateHatchBrush(HS_FDIAGONAL, RGB(200, 200, 200));    pDC->SelectObject(&brush3);    pDC->Rectangle(210, 90, 255, 135);    // 垂直相交阴影线    brush4.CreateHatchBrush(HS_CROSS, RGB(200, 200, 200));    pDC->SelectObject(&brush4);    pDC->Rectangle(120, 135, 165, 175);    // 水平阴影线    brush5.CreateHatchBrush(HS_HORIZONTAL, RGB(200, 200, 200));    pDC->SelectObject(&brush5);    pDC->Rectangle(165, 135, 210, 175);    // 垂直阴影线    brush6.CreateHatchBrush(HS_VERTICAL, RGB(200, 200, 200));    pDC->SelectObject(&brush6);    pDC->Rectangle(210, 135, 255, 175);    //画饼图    const double Pi = 3.14159265358;    pDC->SelectStockObject(BLACK_PEN);    CBrush RedBrush, BlueBrush, YellowBrush;    RedBrush.CreateSolidBrush(RGB(255, 0, 0));    pDC->SelectObject(&RedBrush);    pDC->Pie(10, 100, 100, 190,        (int)(55 + 45 * cos(2 * Pi / 3)), (int)(145 + 45 * sin(2 * Pi / 3)),        (int)(55 + 45 * cos(0.0)), (int)(145 + 45 * sin(0.0)));    BlueBrush.CreateSolidBrush(RGB(0, 255, 255));    pDC->SelectObject(&BlueBrush);    pDC->Pie(10, 100, 100, 190,        (int)(55 + 45 * cos(4 * Pi / 3)), (int)(145 + 45 * sin(4 * Pi / 3)),        (int)(55 + 45 * cos(2 * Pi / 3)), (int)(145 + 45 * sin(2 * Pi / 3)));    YellowBrush.CreateSolidBrush(RGB(255,255,0));    pDC->SelectObject(&YellowBrush);    pDC->Pie(10, 100, 100, 190,        (int)(55 + 45 * cos(0.0)), (int)(145 + 45 * sin(0.0)),        (int)(55 + 45 * cos(4 * Pi / 3)), (int)(145 + 45 * sin(4 * Pi / 3)));}