七巧板讲义.doc

一、 新建工程二、 新建拼板类1. 新建MFC类2. 定义成员变量与类方法全局变量：MAX_POINTS /最大点数 CHIP_WIDTH /原始正方形边长DELTA /起始位置 成员变量：1) 拼板类型：int m_nType2) 拼板点总数：int m_pointCount3) 拼板点数组：CPoint m_pointListMAX_POINTS类方法：1) void SetChip(int type, POINT *ppointList, int count); /显式初始化拼板对象2) void DrawChip(CDC* pDC); /画拼板3) BOOL PtInChip(POINT point); /判断一点是否在拼板中4) LPCRECT GetRect(void); /返回拼板所在矩形范围5) voidRotation(); /旋转拼板 旋转前 旋转后旋转中心横坐标：所在矩形左侧横坐标+所在矩形宽度/2旋转中心纵坐标：所在矩形下侧纵坐标+所在矩形高度/2对每一个点进行坐标转换：相对旋转中心水平位移：原横坐标-旋转中心横坐标相对旋转中心垂直位移：原纵坐标-旋转中心纵坐标 转换后横坐标=旋转中心横坐标+水平位移*cos(旋转角度)-垂直位移*sin（旋转角度） 转换后纵坐标=旋转中心纵坐标+水平位移*cos(旋转角度)+垂直位移*sin（旋转角度）void Chip:Rotation()CRect rect;CRgn rgn;rgn.CreatePolygonRgn(m_pointList, m_nPointCount, ALTERNATE);rgn.GetRgnBox(&rect);double x = rect.left+rect.Width()/2;/ 计算旋转中D心double y = rect.top+rect.Height()/2;double dx, dy;for(int i=0; im_nPointCount; i+)/ 旋转各点dx = m_pointListi.x-x;dy = m_pointListi.y-y;m_pointListi.x = (int)(x+dx*0.7071-dy*0.7071);m_pointListi.y = (int)(y+dx*0.7071+dy*0.7071);6) void MoveTo(CSize offset); /移动拼板一定位移7) void Serialize(CArchive& ar); /实现可串行化void Chip:Serialize(CArchive& ar)if(ar.IsStoring()ar m_nType;ar m_nPointCount;for(int i=0; im_nPointCount; i+)ar m_nType;ar m_nPointCount;for(int i=0; i m_pointListi;3. 实现类方法三、 文档类保存状态数据全局变量：CHIP_COUNT /拼板数成员变量：Chip m_chipListCHIP_COUNT /拼板对象数组成员函数：void Reset() /重置拼板位置void CqqbTestDoc:Reset()POINTpointListMAX_POINTS;pointList0.x = DELTA;pointList0.y = DELTA;pointList1.x = DELTA+CHIP_WIDTH;pointList1.y = DELTA;pointList2.x = DELTA+CHIP_WIDTH/2;pointList2.y = DELTA+CHIP_WIDTH/2;m_chipList0.SetChip(1, pointList, 3);/第一个大三角形pointList0.x = DELTA;pointList0.y = DELTA;pointList1.x = DELTA;pointList1.y = DELTA+CHIP_WIDTH;pointList2.x = DELTA+CHIP_WIDTH/2;pointList2.y = DELTA+CHIP_WIDTH/2;m_chipList1.SetChip(2, pointList, 3);/第二个大三角形pointList0.x = DELTA+CHIP_WIDTH;pointList0.y = DELTA;pointList1.x = DELTA+CHIP_WIDTH;pointList1.y = DELTA+CHIP_WIDTH/2;pointList2.x = DELTA+(CHIP_WIDTH*3)/4;pointList2.y = DELTA+CHIP_WIDTH/4;m_chipList2.SetChip(3, pointList, 3);/第一个小三角形pointList0.x = DELTA+CHIP_WIDTH/2;pointList0.y = DELTA+CHIP_WIDTH/2;pointList1.x = DELTA+CHIP_WIDTH/4;pointList1.y = DELTA+(CHIP_WIDTH*3)/4;pointList2.x = DELTA+(CHIP_WIDTH*3)/4;pointList2.y = DELTA+(CHIP_WIDTH*3)/4;m_chipList3.SetChip(4, pointList, 3);/第二个小三角形pointList0.x = DELTA+CHIP_WIDTH;pointList0.y = DELTA+CHIP_WIDTH/2;pointList1.x = DELTA+CHIP_WIDTH;pointList1.y = DELTA+CHIP_WIDTH;pointList2.x = DELTA+CHIP_WIDTH/2;pointList2.y = DELTA+CHIP_WIDTH;m_chipList4.SetChip(5, pointList, 3);/中三角形pointList0.x = DELTA+(CHIP_WIDTH*3)/4;pointList0.y = DELTA+CHIP_WIDTH/4;pointList1.x = DELTA+CHIP_WIDTH/2;pointList1.y = DELTA+CHIP_WIDTH/2;pointList2.x = DELTA+(CHIP_WIDTH*3)/4;pointList2.y = DELTA+(CHIP_WIDTH*3)/4;pointList3.x = DELTA+CHIP_WIDTH;pointList3.y = DELTA+CHIP_WIDTH/2;m_chipList5.SetChip(6, pointList, 4);/正方形pointList0.x = DELTA;pointList0.y = DELTA+CHIP_WIDTH;pointList1.x = DELTA+CHIP_WIDTH/4;pointList1.y = DELTA+(CHIP_WIDTH*3)/4;pointList2.x = DELTA+(CHIP_WIDTH*3)/4;pointList2.y = DELTA+(CHIP_WIDTH*3)/4;pointList3.x = DELTA+CHIP_WIDTH/2;pointList3.y = DELTA+CHIP_WIDTH;m_chipList6.SetChip(7, pointList, 4);/平行四边形重写函数：void DeleteContents() /删除文档时要重置拼板位置四、 视图区画图成员变量：1) 选中标志：BOOL m_bCaptured2) 鼠标所在点:CPoint m_pointMouse3) 当前拼板索引：int m_nCurrIndex消息映射：ON_WM_LBUTTONDOWN() /鼠标左键按下响应ON_WM_LBUTTONUP() /鼠标左键松开时响应ON_WM_RBUTTONDOWN() /鼠标右键按下时响应ON_WM_MOUSEMOVE() /鼠标移动时响应重写虚函数：OnDraw()五、 添加鼠标响应void CqqbTestView: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CqqbTestDoc* pDoc = GetDocument();ASSERT_VALID(pDoc);for(int i=0;im_chipListi.PtInChip(point)SetCapture();m_bCaptured = TRUE;m_pointMouse = point;m_nCurrIndex = i;break;CView:OnLButtonDown(nFlags, point);void CqqbTestView: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:ReleaseCapture();m_bCaptured = FALSE;CView:OnLButtonUp(nFlags, point);void CqqbTestView:OnRButtonDown(UINT nFlags, CPoint point)CqqbTestDoc* pDoc = GetDocument();ASSERT_VALID(pDoc);/ TODO: 在此添加消息处理程序代码和或调用默认值for(int i=0;im_chipListi.PtInChip(point)InvalidateRect(pDoc-m_chipListi.GetRect();pDoc-m_chipListi.Rotation();InvalidateRect(pDoc-m_chipListi.GetRect(),FALSE);pDoc-SetModifiedFlag();break;CView:OnRButtonDown(nFlags, point);void CqqbTestView: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if(m_bCaptured)CqqbTestDoc *pDoc = GetDocument();ASSERT_VALID(pDoc);InvalidateRect(pDoc-m_chipListm_nCurrIndex.GetRect();CSiz