二维绘图工具文档_xjh.doc

实验报告计算机图形学实验大作业 课程名称 计算机图形学 实验名称 二维绘图与计算机动画 姓 名 学 号 专业班级 成 绩 指导教师 二维绘图工具文档说明目录1简介 1.1基本绘图功能- 1.2附加功能-2程序代码实现 2.0设计的实现曲线对话框等的类- 2.1鼠标左键按下消息响应函数- 2.2鼠标左键弹起消息响- 2.3鼠标移动消息响应函数- 2.4鼠标右键按下消息响应函数-2.5选择绘画类型消息相应函数- 2.6画直线线函数- 2.7画有向箭头的函数- 2.8画长方形函数- 2.9画圆函数- 2.10画椭圆函数- 2.11点击“撤消” 消息响应函数- 2.12点击“清空”消息响应函数- 2.13点击“设置线宽线形”消息响应函数- 2.14点击“设置颜色”消息响应函- 2.15点击“设置字体”消息响应函数- 2.16点击“打开bmp格式测试文件”消息响应函数-3程序的运行结果3.1启动图片-3.2打开的测试图片-3.3运行程序界面-4总结 4.1 程序的问题和缺陷-4.2通过这次编写程序的认知和感触-1简介 使用VC开发平台，MFC框架实现一个画图程序，尽可能多的实现Windows自带的画图功能，并扩展其功能。在视图类中完成图形的绘制，显示，重绘，清空，撤消，设置画笔，设置字体，打开bmp图片。在文档类保存了,画笔的信息。1.1基本绘图功能：1） 用鼠标可以绘制图形，包括一下几种：直线，带箭头的线，任意线，圆形，椭圆，矩形。2） 可以对画笔进行设置：画笔的颜色，画笔的线宽，画笔的形状。3） 可以保存所有的图形到内存中，所有图形绘制后，拉动窗口发生重绘不改变。4） 可以将所有绘制的图形保存到文件中，并且可以读取。5） 可以“新建”空白绘图文档。6） 可以查看最近打开的文档。7） 可以打印用户绘制好后的图形，打印预览你绘制的图形。8） 可以完成一部分的“撤消”功能，1.2附加功能：(1)应用程序的标题栏上有程序的图标。(2)可选择打开或关闭工具栏。(3)可以打开一些文件中放的测试图片。、(4) 有一个开机启动画面。（5）有个绘图工具栏。2程序实现的主要代码/实现文件IMPLEMENT_SERIAL( CGraph, CObject, 1 )/文档串行化的 宏定义DECLARE_SERIAL( CGraph )CGraph:CGraph()CGraph:CGraph(UINT DrawIndex,CPoint FirstPoint,CPoint SecondPoint,COLORREF color,UINT LineWidth,int LineStyle)/5this-m_DrawIndex = DrawIndex;this-m_FirstPoint = FirstPoint;this-m_SecondPoint= SecondPoint;this-m_color = color;this-m_nLineStyle = LineStyle;this-m_nLineWidth = LineWidth;CGraph:CGraph()void CGraph:Draw(CDC *pDC)/CGraph m_DrawIndex CPen hpen(m_nLineStyle,m_nLineWidth,m_color);CBrush *pBrush = CBrush:FromHandle(HBRUSH)GetStockObject(NULL_BRUSH);CBrush *pOldBrush = pDC-SelectObject(pBrush);switch(m_DrawIndex)case 1:pDC-SelectObject(&hpen);pDC-MoveTo(m_FirstPoint);pDC-LineTo(m_SecondPoint);break;case 2:break;case 3:float flRlt;flRlt=(float)(m_FirstPoint.x-m_SecondPoint.x)*(m_FirstPoint.x-m_SecondPoint.x)+(m_FirstPoint.y-m_SecondPoint.y)*(m_FirstPoint.y-m_SecondPoint.y);flRlt=sqrt(flRlt);if(flRlt = 0)return;float flLength = 15;float flAngle = 100;/float tmpX = (float)(m_SecondPoint.x) + (float)(m_FirstPoint.x)-(float)(m_SecondPoint.x)*flLength/flRlt;float tmpY = (float)(m_SecondPoint.y) + (float)(m_FirstPoint.y)-(float)(m_SecondPoint.y)*flLength/flRlt;float fl1X = (tmpX-(float)(m_SecondPoint.x)*cos(-flAngle/2) - (tmpY-(float)(m_SecondPoint.y)*sin(-flAngle/2) + (float)(m_SecondPoint.x);float fl1Y = (tmpY-(float)(m_SecondPoint.y)*cos(-flAngle/2) + (tmpX-(float)(m_SecondPoint.x)*sin(-flAngle/2) + (float)(m_SecondPoint.y);float fl2X = (tmpX-(float)(m_SecondPoint.x)*cos(flAngle/2) - (tmpY-(float)(m_SecondPoint.y)*sin(flAngle/2) + (float)(m_SecondPoint.x);float fl2Y = (tmpY-(float)(m_SecondPoint.y)*cos(flAngle/2) + (tmpX-(float)(m_SecondPoint.x)*sin(flAngle/2) + (float)(m_SecondPoint.y);pDC-SelectObject(&hpen);pDC-MoveTo(m_FirstPoint);pDC-LineTo(m_SecondPoint);pDC-MoveTo(m_SecondPoint.x,m_SecondPoint.y);pDC-LineTo(fl1X,fl1Y);pDC-MoveTo(m_SecondPoint.x,m_SecondPoint.y);pDC-LineTo(fl2X,fl2Y);pDC-MoveTo(fl1X,fl1Y);pDC-LineTo(fl2X,fl2Y);break;case 4:pDC-SelectObject(&hpen);pDC-Ellipse(CRect(m_FirstPoint,m_SecondPoint);pDC-SelectObject(pOldBrush);break;case 5:pDC-SelectObject(&hpen);pDC-Ellipse(CRect(m_FirstPoint,m_SecondPoint);pDC-SelectObject(pOldBrush);break;case 6:pDC-SelectObject(&hpen);pDC-Rectangle(CRect(m_FirstPoint,m_SecondPoint);pDC-SelectObject(pOldBrush);break;void CGraph:Serialize(CArchive &ar)/CArchive /if(ar.IsStoring()arm_DrawIndexm_FirstPointm_SecondPointm_colorm_nLineWidthm_DrawIndexm_FirstPointm_SecondPointm_colorm_nLineWidthm_nLineStyle;/任意曲线类class CStroke : public CObject/public:CStroke(UINT nPenWidth,COLORREF color);protected:CStroke();DECLARE_SERIAL(CStroke)/ Attributesprotected:UINT m_nPenWidth; / one pen width applies to entire strokeCOLORREF m_color; /颜色public:CArray m_pointArray; / series of connected points/ Operationspublic:BOOL DrawStroke(CDC* pDC);public:virtual void Serialize(CArchive& ar);实现文件CStroke.cppIMPLEMENT_SERIAL(CStroke, CObject, 2)CStroke:CStroke()/ This empty constructor should be used by serialization onlyCStroke:CStroke(UINT nPenWidth,COLORREF color)m_nPenWidth = nPenWidth;m_color = color;void CStroke:Serialize(CArchive& ar)if (ar.IsStoring()ar (WORD)m_nPenWidth w m_color;m_nPenWidth = w;m_pointArray.Serialize(ar);BOOL CStroke:DrawStroke(CDC* pDC)CPen penStroke;if (!penStroke.CreatePen(PS_SOLID, m_nPenWidth, m_color)return FALSE;CPen* pOldPen = pDC-SelectObject(&penStroke);pDC-MoveTo(m_pointArray0);for (int i=1; i LineTo(m_pointArrayi);pDC-SelectObject(pOldPen);return TRUE;/线形状和线宽设置对话框类class CSettingDlg : public CDialogpublic:CSettingDlg(CWnd* pParent = NULL); /AFX_DATA(CSettingDlg)enum IDD = IDD_DIALOG1 ;UINTm_nLineWidth; /线宽intm_nLineStyle; /线形状COLORREF m_color; /线的颜色/AFX_DATA/ Overrides/ ClassWizard generated virtual function overrides/AFX_VIRTUAL(CSettingDlg)protected:virtual void DoDataExchange(CDataExchange* pDX); / DDX/DDV support/AFX_VIRTUALprotected:/ Generated message map functions/AFX_MSG(CSettingDlg)afx_msg void OnPaint();/AFX_MSGDECLARE_MESSAGE_MAP();实现文件CSettingDlg.cppCSettingDlg:CSettingDlg(CWnd* pParent /*=NULL*/): CDialog(CSettingDlg:IDD, pParent)/AFX_DATA_INIT(CSettingDlg)m_nLineWidth = 0;m_nLineStyle = -1;/AFX_DATA_INITvoid CSettingDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);/AFX_DATA_MAP(CSettingDlg)DDX_Text(pDX, IDC_EDIT2, m_nLineWidth);DDX_Radio(pDX, IDC_RADIO1, m_nLineStyle);/AFX_DATA_MAPBEGIN_MESSAGE_MAP(CSettingDlg, CDialog)/AFX_MSG_MAP(CSettingDlg)ON_WM_PAINT()/AFX_MSG_MAPEND_MESSAGE_MAP()/ CSettingDlg message handlersvoid CSettingDlg:OnPaint() /这里添加了代码 用于对话框的示例显示CPaintDC dc(this); / device context for painting/ TODO: Add your message handler code hereUpdateData();CPen pen(m_nLineStyle,m_nLineWidth,m_color);/定义画笔dc.SelectObject(&pen);CRect rect;/定义矩形区域GetDlgItem(IDC_STATIC1)-GetWindowRect(&rect);/得到示例静态空间的矩形区域ScreenToClient(&rect);/坐标转换dc.MoveTo(rect.left+20,rect.top+rect.Height()/2);dc.LineTo(rect.right-20,rect.top+rect.Height()/2);/ Do not call CDialog:OnPaint() for painting messages/添加成员变量CToolBar m_newToolBar 一个新的绘图工具栏/在CMainFrame中的OnCreat（）函数中添加的代码:CSplashWnd:ShowSplashScreen(this);/启动画面Sleep(1000);/程序暂停/-新建画图工具栏-/if (!m_newToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP | CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) |!m_newToolBar.LoadToolBar(IDR_DRAW_TOOLBAR)TRACE0(Failed to create toolbarn);return -1; / fail to createm_newToolBar.EnableDocking(CBRS_ALIGN_ANY);EnableDocking(CBRS_ALIGN_ANY);DockControlBar(&m_newToolBar);CMFCDoc.h中public:virtual CMFCDoc();CPen m_penCur; / pen created according toCTypedPtrList m_strokeList;UINT m_nPenWidth; / current user-selected pen widthCOLORREF m_color; /颜色CPen* GetCurrentPen();CStroke* NewStroke();void InitDocument(); /初始化任意曲线的画笔void DeleteContents();/删除任意曲线BOOL OnOpenDocument(LPCTSTR lpszPathName);CMFCDoc.cpp中CStroke* CMFCDoc:NewStroke()/newStrokePOSITION pos = GetFirstViewPosition();CMFCView *pView = (CMFCView*)GetNextView(pos);/获取视类的指针/获取视类的画笔宽度和颜色m_nPenWidth = pView-m_nLineWidth;m_color = pView-m_color;CStroke* pStrokeItem = new CStroke(m_nPenWidth,m_color);m_strokeList.AddTail(pStrokeItem);SetModifiedFlag(); / Mark the document as having been modified, for/ purposes of confirming File Close.return pStrokeItem;BOOL CMFCDoc:OnNewDocument()/新建空白文档if (!CDocument:OnNewDocument()return FALSE;/ TODO: add reinitialization code here/ (SDI documents will reuse this document)/新建空白文档就是把当前的数据全部删除掉POSITION pos = GetFirstViewPosition();CMFCView *pView = (CMFCView*)GetNextView(pos);int max = pView-m_graph.GetSize();for(int i=0;im_graph.RemoveAt(max-i-1);return TRUE;/ CMFCDoc serializationvoid CMFCDoc:Serialize(CArchive& ar)/获取视类的指针POSITION pos = GetFirstViewPosition();CMFCView *pView = (CMFCView*)GetNextView(pos);if (ar.IsStoring()/ TODO: add storing code hereelse/ TODO: add loading code herem_strokeList.Serialize(ar);pView-m_graph.Serialize(ar);/void CMFCDoc:InitDocument()/初始化画笔和颜色m_nPenWidth = 0; / default 2 pixel pen widthm_color = RGB(0,0,0); m_penCur.CreatePen(PS_SOLID, m_nPenWidth, m_color);void CMFCDoc:DeleteContents() /删除保存了任意曲线的数据结构while (!m_strokeList.IsEmpty()delete m_strokeList.RemoveHead();CDocument:DeleteContents();BOOL CMFCDoc:OnOpenDocument(LPCTSTR lpszPathName)/打开一个新的文档if (!CDocument:OnOpenDocument(lpszPathName)return FALSE;return TRUE;CPen* CMFCDoc:GetCurrentPen()/返回画笔return &m_penCur; CMFCView类的代码/CMFCView类class CMFCView : public CView public:DWORD m_DrawIndex; / 当前所选绘画类型的索引CPoint m_random_start; / 任意曲线起点坐标BOOL m_bDraw; /判断左键是否按下CPoint m_start; /起点CPoint m_end; /终点CObArray m_graph; /保存图形 为了重绘 和保存 文件中去COLORREF m_color; /保存画笔颜色CFont m_font; /保存字体CString m_strFontName; /保存字体名称UINTm_nLineWidth; /保存线宽int m_nLineStyle; /保存线形状/-打开bmp图像文件用的一些变量-/BOOL m_bmp; /打开位图文件的标记BITMAPINFO * pBmpInfo; / BITMAPINFO结构指针BYTE* pBmpData; /DIB图像数据指针BITMAPFILEHEADER BmpHeader; /位图文件头BITMAPINFOHEADER BmpInfo; /位图信息DWORD dataBytes;CStroke* m_pStrokeCur; / the stroke in progressCPoint m_ptPrev; / the last mouse pt in the stroke in progress/ Operations/ CMFCView中添加的函数（消息响应函数）public:float GetDistance(CPoint start, CPoint end);/获得两点坐标的距离的函数void DrawArrowLine(CPoint start,CPoint end);/画带箭头线的函数void DrawLine(CPoint start,CPoint end); /画直线函数void DrawEllipse(CPoint start,CPoint end); /画椭圆函数void DrawCircle(CPoint start,CPoint& end); /画圆函数void DrawRect(CPoint start,CPoint end); /画长方形函数protected:/ Generated message map functionsprotected: /AFX_MSG(CMFCView)afx_msg void OnLButtonDown(UINT nFlags, CPoint point); /鼠标左键按下消息响应数afx_msg void OnLButtonUp(UINT nFlags, CPoint point); /鼠标左键弹起消息响应数afx_msg void OnMouseMove(UINT nFlags, CPoint point); /鼠标移动消息响应函数afx_msg void OnRButtonDown(UINT nFlags, CPoint point); /鼠标右键按下消息响应数afx_msg void OnDrawChange(WORD nID); /选择绘画类型索引afx_msg void OnUpdateOperDrawChange(CCmdUI * pCmdUI); afx_msg void OnEditUndo(); /点击 撤消 消息响应函数afx_msg void OnClear(); /点击 清空 消息响应函数afx_msg void OnSetLineStyleWidth(); /点击 设置线宽线型 消息响应函数afx_msg void OnSetFont(); /点击 设置字体 消息响应函数afx_msg void OnSetColor(); /点击 设置颜色 消息响应函数afx_msg void OnOpenBmp(); /点击 打开bmp图像文件 消息响应函数/AFX_MSGDECLARE_MESSAGE_MAP();CMFCView:CMFCView()/在构造函数中 初始化一些变量/ TODO: add construction code herem_bDraw = false;/左键按下标志m_nLineStyle = 0;/线形状m_nLineWidth = 1;/线宽m_DrawIndex = 0;/绘画类型索引 0的画 为鼠标 m_color = RGB(0,0,0);/初始化画笔颜色void CMFCView:OnDraw(CDC* pDC)/在OnDraw函数中添加的代码CMFCDoc* pDoc = GetDocument(); /-重绘时显示任意曲线-/CTypedPtrList& strokeList = pDoc-m_strokeList;POSITION pos = strokeList.GetHeadPosition();while (pos != NULL)CStroke* pStroke = strokeList.GetNext(pos);pStroke-DrawStroke(pDC); /-重绘时显示保存在m_graph中的图形-/int pCount = m_graph.GetSize();for(int j=0;jDraw(pDC); / 用于 绘制有橡皮条功能的图形的代码-/if(m_bDraw = true)switch(m_DrawIndex)case 1:DrawLine(m_start,m_end);break;case 3:DrawArrowLine(m_start,m_end);break;case 4:DrawCircle(m_start,m_end);break;case 5:DrawEllipse(m_start,m_end);break;case 6:DrawRect(m_start,m_end);break; /用于文本文件重绘的代码-/if(m_txt = true & m_DrawIndex = 0)CRect Rect; GetClientRect(&Rect);pDC-SelectObject(m_font);pDC-DrawText(pBuf,Rect,DT_WORDBREAK); /用于图片重绘的代码-/if(m_bmp = true & m_DrawIndex = 0)pDC-SetStretchBltMode(COLORONCOLOR);StretchDIBits(pDC-GetSafeHdc(),0,0,BmpInfo.biWidth,BmpInfo.biHeight,0,0,BmpInfo.biWidth,BmpInfo.biHeight,pBmpData,pBmpInfo,DIB_RGB_COLORS,SRCCOPY);ASSERT_VALID(pDoc);/ TODO: add draw code for native data here/ 2.1鼠标左键按下消息响应函数void CMFCView:OnLButtonDown(UINT nFlags, CPoint point)/ TODO: Add your message handler code here and/or call defaultswitch(m_DrawIndex)case 1:m_bDraw = true;m_start = point;break;case 2:m_bDraw = true;m_pStrokeCur = GetDocument()-NewStroke();/ Add first point to the new strokem_pStrokeCur-m_pointArray.Add(point);m_random_start = point; / Serves as the MoveTo() anchor point for the / LineTo() the next point, as the user drags the / mouse.break;case 3:m_bDraw = true;m_start = point;break;case 4:m_bDraw = true;m_start = point;break;case 5:m_bDraw = true;m_start = point;break;case 6:m_bDraw = true;m_start = point;break;m_end = point;CView:OnLButtonDown(nFlags, point);/2.2鼠标左键弹起消息响应函数void CMFCView:OnLButtonUp(UINT nFlags, CPoint point) / TODO: Add your message handler code here and/or call defaultm_bDraw = false;CClientDC dc(this);CMFCDoc * pDoc = GetDocument();CPen* pOldPen = dc.SelectObject(pDoc-GetCurrentPen();switch(m_DrawIndex)case 1:m_end = point;DrawLine(m_start,m_end);CGraph *graph = new CGraph(m_DrawIndex,m_start,m_end,m_color,m_nLineWidth,m_nLineStyle);m_graph.Add(graph);break;case 2:/m_bDraw = false;dc.MoveTo(m_random_start);dc.LineTo(point);dc.SelectObject(pOldPen);m_pStrokeCur-m_pointArray.Add(point);break;case 3:m_end = point;DrawArrowLine(m_start,m_end);CGraph *graph = new CGraph(m_DrawIndex,m_start,m_end,m_color,m_nLineWidth,m_nLineStyle);m_graph.Add(graph);break;case 4:m_end = point;DrawCircle(m_start,m_end);CGraph *graph = new CGraph(m_DrawIndex,m_start,m_end,m_color,m_nLineWidth,m_nLineStyle);m_graph.Add(graph);break;case 5:m_end = point;DrawEllipse(m_start,m_end);CGraph *graph = new CGraph(m_DrawIndex,m_start,m_end,m_color,m_nLineWidth,m_nLineStyle);m_graph.Add(graph);break;case 6:m_end = point;DrawRect(m_start,m_end);CGraph *graph =