www.gusucode.com > VC++绘制几何图形,并实现填充源码程序 > VC++绘制几何图形,并实现填充源码程序/code/DrawView.cpp
// DrawView.cpp : implementation of the CDrawView class // Download by http://www.NewXing.com #include "stdafx.h" #include "Draw.h" #include "DrawDoc.h" #include "DrawView.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CDrawView IMPLEMENT_DYNCREATE(CDrawView, CView) BEGIN_MESSAGE_MAP(CDrawView, CView) //{{AFX_MSG_MAP(CDrawView) ON_WM_CREATE() ON_COMMAND(ID_DRAW_LINECOLOR, OnDrawLinecolor) ON_COMMAND(ID_DRAW_FILLCOLOR, OnDrawFillcolor) ON_WM_LBUTTONUP() ON_WM_MOUSEMOVE() ON_WM_LBUTTONDOWN() ON_WM_SETCURSOR() //}}AFX_MSG_MAP ON_COMMAND_RANGE(ID_DRAW_LINE,ID_DRAW_FILL, OnSelectDrawType) ON_UPDATE_COMMAND_UI_RANGE(ID_DRAW_LINE,ID_DRAW_FILL, OnUpdateSelectDrawType) ON_COMMAND_RANGE(ID_DRAW_LINEWIDTH_ONE,ID_DRAW_LINEWIDTH_FIVE, OnDrawLineWidth) ON_UPDATE_COMMAND_UI_RANGE(ID_DRAW_LINEWIDTH_ONE,ID_DRAW_LINEWIDTH_FIVE,OnUpdateDrawLineWidth) // 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() ///////////////////////////////////////////////////////////////////////////// // CDrawView construction/destruction CDrawView::CDrawView() { // TODO: add construction code here m_pMemDC = new CDC; m_pBitmap = new CBitmap; m_nDrawType = -1; m_nLineWidth = 1; m_cLineColor = RGB(0,0,0); m_cFillColor = RGB(0,0,255); m_bDrawing = false; } CDrawView::~CDrawView() { delete m_pMemDC; delete m_pBitmap; } BOOL CDrawView::PreCreateWindow(CREATESTRUCT& cs) { // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs return CView::PreCreateWindow(cs); } ///////////////////////////////////////////////////////////////////////////// // CDrawView drawing void CDrawView::OnDraw(CDC* pDC) { CDrawDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); // TODO: add draw code for native data here CBitmap * pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); pDC->BitBlt(0,0,m_nMaxX, m_nMaxY, m_pMemDC, 0,0, SRCCOPY); m_pMemDC->SelectObject(pOldBitmap); } ///////////////////////////////////////////////////////////////////////////// // CDrawView printing BOOL CDrawView::OnPreparePrinting(CPrintInfo* pInfo) { // default preparation return DoPreparePrinting(pInfo); } void CDrawView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add extra initialization before printing } void CDrawView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add cleanup after printing } ///////////////////////////////////////////////////////////////////////////// // CDrawView diagnostics #ifdef _DEBUG void CDrawView::AssertValid() const { CView::AssertValid(); } void CDrawView::Dump(CDumpContext& dc) const { CView::Dump(dc); } CDrawDoc* CDrawView::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDrawDoc))); return (CDrawDoc*)m_pDocument; } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // CDrawView message handlers int CDrawView::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CView::OnCreate(lpCreateStruct) == -1) return -1; // TODO: Add your specialized creation code here m_nMaxX = GetSystemMetrics(SM_CXSCREEN); m_nMaxY = GetSystemMetrics(SM_CYSCREEN); CDC * pDC = GetDC(); m_pMemDC->CreateCompatibleDC(pDC); m_pBitmap->CreateCompatibleBitmap(pDC, m_nMaxX, m_nMaxY); CBitmap * pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); CBrush brush; brush.CreateStockObject(WHITE_BRUSH); CRect rect(-1,-1,m_nMaxX, m_nMaxY); m_pMemDC->FillRect(rect,&brush); m_pMemDC->SelectObject(pOldBitmap); ReleaseDC(pDC); return 0; } void CDrawView::OnSelectDrawType(UINT nID) { m_nDrawType = nID - ID_DRAW_LINE; } void CDrawView::OnUpdateSelectDrawType(CCmdUI * pCmdUI) { int nID = pCmdUI->m_nID - ID_DRAW_LINE; if(nID == m_nDrawType) pCmdUI->SetCheck(true); else pCmdUI->SetCheck(false); } void CDrawView::OnDrawLineWidth(UINT nID) { m_nLineWidth = nID - ID_DRAW_LINEWIDTH_ONE + 1; } void CDrawView::OnUpdateDrawLineWidth(CCmdUI * pCmdUI) { int nID = pCmdUI->m_nID - ID_DRAW_LINEWIDTH_ONE + 1; if(nID == m_nLineWidth) pCmdUI->SetCheck(true); else pCmdUI->SetCheck(false); } void CDrawView::OnDrawLinecolor() { // TODO: Add your command handler code here CColorDialog dlg; dlg.m_cc.Flags |= CC_PREVENTFULLOPEN | CC_RGBINIT; dlg.m_cc.rgbResult = m_cLineColor; if(dlg.DoModal() == IDOK) { m_cLineColor = dlg.GetColor(); } } void CDrawView::OnDrawFillcolor() { // TODO: Add your command handler code here CColorDialog dlg; dlg.m_cc.Flags |= CC_PREVENTFULLOPEN | CC_RGBINIT; dlg.m_cc.rgbResult = m_cFillColor; if(dlg.DoModal() == IDOK) { m_cFillColor = dlg.GetColor(); } } void CDrawView::OnLButtonDown(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default if(m_bDrawing) return; SetCapture(); m_bDrawing = true; m_ptStart = point; m_ptOld = point; if(m_nDrawType == 3) { CBrush * pOldBrush; CBitmap * pOldBitmap; CBrush brFill; brFill.CreateSolidBrush(m_cFillColor); pOldBrush = m_pMemDC->SelectObject(&brFill); pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); m_pMemDC->ExtFloodFill(point.x,point.y, m_pMemDC->GetPixel(point), FLOODFILLSURFACE); Invalidate(false); m_pMemDC->SelectObject(pOldBrush); m_pMemDC->SelectObject(pOldBitmap); m_bDrawing = false; } // CView::OnLButtonDown(nFlags, point); } void CDrawView::OnMouseMove(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default if(m_bDrawing) { CDC * pDC = GetDC(); CBitmap * pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); CPen pen; pen.CreatePen(PS_SOLID, m_nLineWidth, m_cLineColor); CPen * pOldPen = pDC->SelectObject(&pen); CBrush * pOldBrush = (CBrush *) pDC->SelectStockObject(NULL_BRUSH); CRect rectOld(m_ptStart, m_ptOld); rectOld.NormalizeRect(); rectOld.InflateRect(m_nLineWidth, m_nLineWidth); pDC->BitBlt(rectOld.left, rectOld.top, rectOld.Width(), rectOld.Height(),m_pMemDC, rectOld.left, rectOld.top, SRCCOPY); CRect rectNew(m_ptStart,point); switch(m_nDrawType) { case 0: pDC->MoveTo(m_ptStart); pDC->LineTo(point); break; case 1: pDC->Rectangle(rectNew); break; case 2: pDC->Ellipse(rectNew); break; default: break; } m_pMemDC->SelectObject(pOldBitmap); m_pMemDC->SelectObject(pOldPen); m_pMemDC->SelectObject(pOldBrush); ReleaseDC(pDC); m_ptOld = point; } // CView::OnMouseMove(nFlags, point); } void CDrawView::OnLButtonUp(UINT nFlags, CPoint point) { // TODO: Add your message handler code here and/or call default if(m_bDrawing) { m_bDrawing = false; CBitmap * pOldBitmap = m_pMemDC->SelectObject(m_pBitmap); CPen pen; pen.CreatePen(PS_SOLID, m_nLineWidth, m_cLineColor); CPen * pOldPen = m_pMemDC->SelectObject(&pen); CBrush * pOldBrush = (CBrush *) m_pMemDC->SelectStockObject(NULL_BRUSH); CRect rectNew(m_ptStart,point); switch(m_nDrawType) { case 0: m_pMemDC->MoveTo(m_ptStart); m_pMemDC->LineTo(point); break; case 1: m_pMemDC->Rectangle(rectNew); break; case 2: m_pMemDC->Ellipse(rectNew); break; default: break; } Invalidate(false); m_pMemDC->SelectObject(pOldBitmap); m_pMemDC->SelectObject(pOldPen); m_pMemDC->SelectObject(pOldBrush); } ReleaseCapture(); // CView::OnLButtonUp(nFlags, point); } BOOL CDrawView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) { // TODO: Add your message handler code here and/or call default switch(m_nDrawType) { case 0: case 1: case 2: ::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_CROSS)); break; case 3: ::SetCursor(AfxGetApp()->LoadCursor(ID_CURSOR_FILL)); break; default: ::SetCursor(AfxGetApp()->LoadStandardCursor(IDC_ARROW)); break; } return true; // return CView::OnSetCursor(pWnd, nHitTest, message); }