VC ：在对话框中绘图

主要代码如下：显示代码如下： CDC * pDialogDC = GetDC(); Invalidate(); UpdateWindow(); CPen pen(PS_SOLID,2,RGB(255,0,0)); pDialogDC->SelectObject(&pen); for (int i = 0;i < picVector.size(); i++) { switch(picVector[i]->picFlag) { case 0: pDialogDC->MoveTo(picVector[i]->startPoint); pDialogDC->LineTo(picVector[i]->endPoint); break; case 1: pDialogDC->Ellipse(picVector[i]->startPoint.x,picVector[i]->startPoint.y,picVector[i]->endPoint.x,picVector[i]->endPoint.y); break; case 2: pDialogDC->Rectangle(picVector[i]->startPoint.x,picVector[i]->startPoint.y,picVector[i]->endPoint.x,picVector[i]->endPoint.y); break; } } ReleaseDC(pDialogDC);往vector容器中添加获取的元素（包括所画图的类型，鼠标按下、抬起两点）：void CForwardBackDlg::OnLButtonUp(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default upPoint = point; CPicture * pPic = new CPicture(); pPic->picFlag = style; pPic->startPoint = downPoint; pPic->endPoint = upPoint; picVector.push_back(pPic); bakeupVector.push_back(pPic); //delete pPic;//检查传递到容器中是否是地址传递，答案： 是 Invalidate();//只刷新对话框中控件 不刷新对话框自身 //UpdateWindow(); CDialog::OnLButtonUp(nFlags, point);}撤销代码如下： if(picVector.size() > 0) { //delete picVector[picVector.size() - 1]; picVector.pop_back();

 

参考：

void CForwardBackDlg::OnPaint() {      CDC * pControlDC = GetDC();     Invalidate();     UpdateWindow();     pControlDC->SelectStockObject(BLACK_BRUSH);     pControlDC->Rectangle(0,0,100,100);     ReleaseDC(pControlDC);

}

转载于:https://www.cnblogs.com/shenchao/archive/2012/10/04/2711455.html

相关资源：VC 绘图程序，界面设计，对话框编程