绘图程序代码

绘图程序代码文档类：(1). class CDrawDoc : public CDocument{┆public: //定义数据成员COLORREF m_color; //颜色CRect m_rectGraph; //矩形CPoint m_OldPoint,m_NewPoint,m_LastPoint; //直线int m_nType; //选择的画法类型CPoint m_Curve[1000]; //随手画int m_nCurveCount;};(2).BOOL CDrawDoc::OnNewDocument() //文档类中初始化变量{if (!CDocument::OnNewDocument())return FALSE;// TODO: add reinitialization code here// (SDI documents will reuse this document)m_color=RGB(0,0,0);m_rectGraph=CRect(0,0,0,0);m_nType=1;m_nCurveCount=0;return TRUE;}(3).void CDrawDoc::Serialize(CArchive& ar) //文档类的序列化函数为保存和读出代码{if (ar.IsStoring()){// TODO: add storing code herear<<m_color;ar<<m_LastPoint;ar<<m_NewPoint;ar<<m_nType;ar<<m_OldPoint;ar<<m_nCurveCount;ar<<m_rectGraph;for(int i=0;i<m_nCurveCount;i++)ar<<m_Curve[i];}else{// TODO: add loading code herear>>m_color;ar>>m_LastPoint;ar>>m_NewPoint;ar>>m_nType;ar>>m_OldPoint;ar>>m_nCurveCount;ar>>m_rectGraph;for(int i=0;i<m_nCurveCount;i++)ar>>m_Curve[i];}}视图类:(4).class CDrawView : public CView{┆private:BOOL m_bCaptured; //捕捉标志//自定义的刷新函数，用于调整矩形的坐标，确保矩形的第二对坐标参数大于第一对 void MyInvalidateRect(CRect rect,BOOL bErase=TRUE);};(5).CDrawView::CDrawView() //视图类构造函数初始化变量{// TODO: add construction code herem_bCaptured=FALSE;}(6).void CDrawView::OnDraw(CDC* pDC) //绘图{CDrawDoc* pDoc = GetDocument();ASSERT_VALID(pDoc);// TODO: add draw code for native data hereCPen newPen,*oldPen;newPen.CreatePen(PS_SOLID,1,pDoc->m_color); //创建选定颜色的绘图笔oldPen=pDC->SelectObject(&newPen);switch(pDoc->m_nType){case 1: //画直线pDC->MoveTo(pDoc->m_OldPoint);pDC->LineTo(pDoc->m_NewPoint);break;case 2: //绘制矩形pDC->Rectangle(pDoc->m_rectGraph);break;case 3: //绘制圆pDC->Ellipse(pDoc->m_rectGraph);break;case 4: //绘制随手画if(pDoc->m_nCurveCount>0){pDC->MoveTo(pDoc->m_Curve[0]);for(int j=1;j<pDoc->m_nCurveCount;j++)pDC->LineTo(pDoc->m_Curve[j]);}break;}pDC->SelectObject(oldPen);}菜单消息处理函数:(7).void CDrawView::OnSelectEllipse() //与画圆子菜单对应的消息处理函数{// TODO: Add your command handler code hereCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);pDoc->m_nType=3;}void CDrawView::OnUpdateSelectEllipse(CCmdUI* pCmdUI) //修改画圆子菜单对应的消息处理函数{// TODO: Add your command update UI handler code hereCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);pCmdUI->SetCheck(pDoc->m_nType==3);}void CDrawView::OnSelectFree() //与随手画子菜单对应的消息处理函数{// TODO: Add your command handler code hereCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);pDoc->m_nType=4;}void CDrawView::OnUpdateSelectFree(CCmdUI* pCmdUI)//修改随手画子菜单对应的消息处理函数{// TODO: Add your command update UI handler code hereCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);pCmdUI->SetCheck(pDoc->m_nType==4);}void CDrawView::OnSelectLine()//与画线子菜单对应的消息处理函数{// TODO: Add your command handler code hereCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);pDoc->m_nType=1;}void CDrawView::OnUpdateSelectLine(CCmdUI* pCmdUI)//修改画线子菜单对应的消息处理函数{// TODO: Add your command update UI handler code hereCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);pCmdUI->SetCheck(pDoc->m_nType==1);}void CDrawView::OnSelectRect()//与画矩形子菜单对应的消息处理函数{// TODO: Add your command handler code hereCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);pDoc->m_nType=2;}void CDrawView::OnUpdateSelectRect(CCmdUI* pCmdUI)//修改画矩形子菜单对应的消息处理函数{// TODO: Add your command update UI handler code hereCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);pCmdUI->SetCheck(pDoc->m_nType==2);}void CDrawView::OnColor() //显示颜色对话框处理函数{// TODO: Add your command handler code hereCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);CColorDialog dlg;if(dlg.DoModal()==IDOK)pDoc->m_color=dlg.GetColor(); //取颜色对话框颜色}鼠标消息处理函数:(8).void CDrawView::OnLButtonDown(UINT nFlags, CPoint point) //鼠标按下消息处理函数{// TODO: Add your message handler code here and/or call defaultCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);if(pDoc->m_nType>=1&&pDoc->m_nType<=4){m_bCaptured=TRUE;SetCapture(); //设置鼠标捕获pDoc->m_OldPoint=point; //取画线起始点、续点、区域pDoc->m_NewPoint=point;pDoc->m_rectGraph=CRect(point,point);if(pDoc->m_nType==4){pDoc->m_Curve[0]=point; //随手画的第一个点pDoc->m_nCurveCount=1; //随手画的所有点计数}Invalidate();}CView::OnLButtonDown(nFlags, point);}void CDrawView::OnMouseMove(UINT nFlags, CPoint point)//鼠标移动消息处理函数{// TODO: Add your message handler code here and/or call defaultCDrawDoc* pDoc=GetDocument();ASSERT_VALID(pDoc);if(m_bCaptured){if(pDoc->m_nType>=1&&pDoc->m_nType<=3)//鼠标移动获取起点、续点、区域{InvalidateRect(pDoc->m_rectGraph);pDoc->m_rectGraph=CRect(pDoc->m_OldPoint,point);pDoc->m_NewPoint=point;InvalidateRect(pDoc->m_rectGraph);}else{if(pDoc->m_nCurveCount<1000)//随手画则计算弯曲点{pDoc->m_OldPoint=pDoc->m_NewPoint;pDoc->m_NewPoint=point;pDoc->m_rectGraph=CRect(pDoc->m_OldPoint,pDoc->m_NewPoint);pDoc->m_Curve[pDoc->m_nCurveCount]=point;pDoc->m_nCurveCount++;InvalidateRect(pDoc->m_rectGraph);}}}CView::OnMouseMove(nFlags, point);}void CDrawView::OnLButtonUp(UINT nFlags, CPoint point)//{// TODO: Add your message handler code here and/or call defaultm_bCaptured=FALSE;ReleaseCapture(); //释放捕获Invalidate();CView::OnLButtonUp(nFlags, point);}。