vc++简易图形编辑器MFC

// homeworkView.cpp : implementation of the CHomeworkView class // #include "stdafx.h" #include "homework.h" #include "homeworkDoc.h" #include "homeworkView.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CHomeworkView IMPLEMENT_DYNCREATE(CHomeworkView, CView) BEGIN_MESSAGE_MAP(CHomeworkView, CView) //{{AFX_MSG_MAP(CHomeworkView) ON_COMMAND(ID_DRAW_RECTANGLE, OnDrawRectangle) ON_COMMAND(ID_DRAW_ELLIPSE, OnDrawEllipse) ON_COMMAND(ID_DRAW_HUATU, OnDrawHuatu) ON_COMMAND(ID_DRAW_LINE, OnDrawLine) ON_UPDATE_COMMAND_UI(ID_DRAW_RECTANGLE, OnUpdateDrawRectangle) ON_UPDATE_COMMAND_UI(ID_DRAW_ELLIPSE, OnUpdateDrawEllipse) ON_UPDATE_COMMAND_UI(ID_DRAW_HUATU, OnUpdateDrawHuatu) ON_UPDATE_COMMAND_UI(ID_DRAW_LINE, OnUpdateDrawLine) ON_WM_LBUTTONDOWN() ON_WM_LBUTTONUP() ON_WM_MOUSEMOVE() ON_COMMAND(ID_DRAW_ERASER, OnDrawEraser) ON_COMMAND(IDR_VIEW_CURSOR, OnViewCursor) ON_WM_SETCURSOR() //}}AFX_MSG_MAP // Standard printing commands ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint) ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint) ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview) END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CHomeworkView construction/destruction CHomeworkView::CHomeworkView() { // TODO: add construction code here m_bDrawMode=false; } CHomeworkView::~CHomeworkView() { } BOOL CHomeworkView::PreCreateWindow(CREATESTRUCT& cs) { cs.lpszClass=AfxRegisterWndClass( CS_DBLCLKS,AfxGetApp()->LoadStandardCursor(IDC_CROSS), (HBRUSH)(COLOR_WINDOW+1), AfxGetApp()->LoadIcon(IDR_MAINFRAME)); // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs return CView::PreCreateWindow(cs); } ///////////////////////////////////////////////////////////////////////////// // CHomeworkView drawing void CHomeworkView::OnDraw(CDC* pDC) { CHomeworkDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); //pDC->FillSolidRect(CRect(0,0,1200,800),RGB(125,125,125)); pDC->FillSolidRect(CRect(20,20,50,40),RGB(255,0,0)); //用颜色填充区域 pDC->FillSolidRect(CRect(55,20,80,40),RGB(0,255,0)); pDC->FillSolidRect(CRect(85,20,110,40),RGB(0,0,255)); pDC->FillSolidRect(CRect(115,20,140,40),RGB(0,0,0)); pDC->FillSolidRect(CRect(145,20,170,40),RGB(125,125,0)); pDC->Ellipse(CRect(50,50,100,100)); //画椭圆 pDC->Rectangle(CRect(50,110,100,160)); //画矩形 pDC->Ellipse(CRect(50,170,100,270)); //画圆 // TODO: add draw code for native data here } ///////////////////////////////////////////////////////////////////////////// // CHomeworkView printing BOOL CHomeworkView::OnPreparePrinting(CPrintInfo* pInfo) { // default preparation return DoPreparePrinting(pInfo); } void CHomeworkView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add extra initialization before printing } void CHomeworkView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add cleanup after printing } ///////////////////////////////////////////////////////////////////////////// // CHomeworkView diagnostics #ifdef _DEBUG void CHomeworkView::AssertValid() const { CView::AssertValid(); } void CHomeworkView::Dump(CDumpContext& dc) const { CView::Dump(dc); } CHomeworkDoc* CHomeworkView::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CHomeworkDoc))); return (CHomeworkDoc*)m_pDocument; } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // CHomeworkView message handlers void CHomeworkView::OnDrawRectangle() { // TODO: Add your command handler code here ResetAllFlags(); m_bRectangle=true; //实现画矩形的菜单响应函数 } void CHomeworkView::OnDrawEllipse() { // TODO: Add your command handler code here ResetAllFlags(); //实现画椭圆的菜单响应函数 m_bEllipse=true; } void CHomeworkView::OnDrawHuatu() { // TODO: Add your command handler code here ResetAllFlags(); //实现随手画的菜单响应函数 m_bHuatu=true; } void CHomeworkView::OnDrawLine() { // TODO: Add your command handler code here ResetAllFlags(); //实现画直线的菜单响应函数 m_bLine=true; } void CHomeworkView::OnUpdateDrawRectangle(CCmdUI* pCmdUI) //为菜单添加画矩形的核对标记 { // TODO: Add your command update UI handler code here pCmdUI->SetCheck(m_bRectangle); } void CHomeworkView::OnUpdateDrawEllipse(CCmdUI* pCmdUI) //为菜单添加画椭圆的核对标记 { // TODO: Add your command update UI handler code here pCmdUI->SetCheck(m_bEllipse); } void CHomeworkView::OnUpdateDrawHuatu(CCmdUI* pCmdUI) //为菜单添加随手画的核对标记 { // TODO: Add your command update UI handler code here pCmdUI->SetCheck(m_bHuatu); } void CHomeworkView::OnUpdateDrawLine(CCmdUI* pCmdUI) //为菜单添加画直线的核对标记 { // TODO: Add your command update UI handler code here pCmdUI->SetCheck(m_bLine); } void CHomeworkView::ResetAllFlags() //设置默认标志变量 { m_bRectangle=false; m_bEllipse=false; m_bHuatu=false; m_bLine=false; } void CHomeworkView::OnLButtonDown(UINT nFlags, CPoint point) //鼠标按下的消息映射函数 { // TODO: Add your message handler code here and/or call default // if(m_bRectangle||m_bEllipse) m_LastEndPoint=point; { m_startPoint=point; SetCapture(); } if(m_bHuatu) { m_startPoint=point; } if(m_bLine) { m_startPoint=point; m_LastEndPoint=point; SetCapture(); } ::SetCursor(AfxGetApp()->LoadCursor(IDC_DRAW_CURSOR1)); //设置光标 //Invalidate(); CView::OnLButtonDown(nFlags, point); } void CHomeworkView::OnLButtonUp(UINT nFlags, CPoint point) //鼠标松开的消息映射函数 { // TODO: Add your message handler code here and/or call default CClientDC dc(this); if(m_bRectangle&&(GetCapture()==this)) { ReleaseCapture(); CGdiObject*pOldObject=dc.SelectStockObject(NULL_BRUSH); dc.Rectangle(m_startPoint.x,m_startPoint.y,point.x,point.y); dc.SelectObject(pOldObject); } if(m_bEllipse&&(GetCapture()==this)) { ReleaseCapture(); CGdiObject*pOldObject=dc.SelectStockObject(NULL_BRUSH); dc.Ellipse(m_startPoint.x,m_startPoint.y,point.x,point.y); dc.SelectObject(pOldObject); } if(m_bLine&&(GetCapture()==this)) { ReleaseCapture(); dc.MoveTo(m_startPoint); dc.LineTo(point); } CView::OnLButtonUp(nFlags, point); } void CHomeworkView::OnMouseMove(UINT nFlags, CPoint point) //鼠标移动时的消息响应函数 { // TODO: Add your message handler code here and/or call default CClientDC dc(this); if(m_bHuatu&&(nFlags&&MK_LBUTTON)) { dc.MoveTo(m_startPoint); dc.LineTo(point); m_startPoint=point; } if(m_bRectangle&&(nFlags&&MK_LBUTTON)) { CGdiObject*pOldObject=dc.SelectStockObject(NULL_BRUSH); int nDrawmdoe=dc.GetROP2(); dc.SetROP2(R2_NOTCOPYPEN); dc.Rectangle(m_LastEndPoint.x,m_LastEndPoint.y,m_startPoint.x,m_startPoint.y); dc.SetROP2(nDrawmdoe); dc.Rectangle(m_startPoint.x,m_startPoint.y,point.x,point.y); dc.SelectObject(pOldObject); m_LastEndPoint=point; } if(m_bEllipse&&(nFlags&&MK_LBUTTON)) { CGdiObject*pOldObject=dc.SelectStockObject(NULL_BRUSH); int nDrawmdoe=dc.GetROP2(); dc.SetROP2(R2_NOTCOPYPEN); dc.Ellipse(m_LastEndPoint.x,m_LastEndPoint.y,m_startPoint.x,m_startPoint.y); dc.SelectObject(pOldObject); m_LastEndPoint=point; } if(m_bLine&&(nFlags&&MK_LBUTTON)) { int nDrawmdoe=dc.GetROP2(); dc.SetROP2(R2_NOT); dc.MoveTo(m_startPoint); dc.LineTo(m_LastEndPoint); dc.SetROP2(nDrawmdoe); dc.MoveTo(m_startPoint); dc.LineTo(point); m_LastEndPoint=point; } CView::OnMouseMove(nFlags, point); } void CHomeworkView::OnDrawEraser() //橡皮擦功能 { // TODO: Add your command ha