MFC绘图
看孙鑫视频上第四章写的
主要代码:
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point) { // TODO: 在此添加消息处理程序代码和/或调用默认值 //MessageBox("down"); m_ptOrigin = c_ptOld = point; m_bDraw = TRUE; CView::OnLButtonDown(nFlags, point); } void CDrawView::OnLButtonUp(UINT nFlags, CPoint point) { // TODO: 在此添加消息处理程序代码和/或调用默认值 //MessageBox("up"); /* HDC hdc = ::GetDC(m_hWnd); MoveToEx(hdc, m_ptOrigin.x, m_ptOrigin.y, NULL); LineTo(hdc, point.x, point.y); ::ReleaseDC(m_hWnd, hdc); */ /* CDC *pDC = GetDC(); pDC->MoveTo(m_ptOrigin); pDC->LineTo(point); ReleaseDC(pDC); */ /* CClientDC dc(this); //CClientDC dc(GetParent()); dc.MoveTo(m_ptOrigin); dc.LineTo(point); */ /* //CWindowDC dc(this); //CWindowDC dc(GetParent()); CWindowDC dc(GetDesktopWindow()); dc.MoveTo(m_ptOrigin); dc.LineTo(point); */ /* //CPen pen(PS_SOLID, 90, RGB(65, 88, 65)); //CPen pen(PS_DASH, 1, RGB(65, 88, 65)); CPen pen(PS_DOT, 1, RGB(65, 88, 65)); CClientDC dc(this); CPen * pOldPen = dc.SelectObject(&pen); dc.MoveTo(m_ptOrigin); dc.LineTo(point); dc.SelectObject(pOldPen); */ //CBrush brush(RGB(23, 22, 67)); //CBitmap bitmap; //bitmap.LoadBitmap(IDB_BITMAP1); //CBrush brush(&bitmap); //CClientDC dc(this); //dc.FillRect(CRect(m_ptOrigin, point), &brush); /* CClientDC dc(this); CBrush *pBrush = CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH)); CBrush *pOldBrush = dc.SelectObject(pBrush); dc.Rectangle(CRect(m_ptOrigin, point)); dc.SelectObject(pOldBrush); */ m_bDraw = FALSE; CView::OnLButtonUp(nFlags, point); } void CDrawView::OnMouseMove(UINT nFlags, CPoint point) { // TODO: 在此添加消息处理程序代码和/或调用默认值 CClientDC dc(this); CPen pen(PS_SOLID, 0, RGB(65, 88, 65)); CPen *pOldPen = dc.SelectObject(&pen); if(m_bDraw == TRUE){ dc.SetROP2(R2_BLACK); dc.MoveTo(m_ptOrigin); //dc.LineTo(point); dc.LineTo(c_ptOld); //dc.MoveTo(m_ptOrigin); dc.MoveTo(c_ptOld); dc.LineTo(point); //m_ptOrigin = point; c_ptOld = point; } dc.SelectObject(pOldPen); CView::OnMouseMove(nFlags, point); }
讲了好几种方法,主要用的还是CClientDC这种的吧
posted on 2012-09-18 13:44 louzhang_swk 阅读(245) 评论(0) 编辑 收藏 举报