www.gusucode.com > 如何实现“橡皮筋”功能源码程序 > 如何实现“橡皮筋”功能源码程序/Demo/DemoView.cpp
//Download by http://www.NewXing.com // DemoView.cpp : implementation of the CDemoView class // #include "stdafx.h" #include "Demo.h" #include "DemoDoc.h" #include "DemoView.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CDemoView IMPLEMENT_DYNCREATE(CDemoView, CView) BEGIN_MESSAGE_MAP(CDemoView, CView) //{{AFX_MSG_MAP(CDemoView) ON_WM_SETCURSOR() ON_WM_LBUTTONDOWN() //}}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() ///////////////////////////////////////////////////////////////////////////// // CDemoView construction/destruction CDemoView::CDemoView() { //设置Tracker矩形 m_RectTracker.m_rect.SetRect(0, 0, 100, 100); //设置Tracker风格 m_RectTracker.m_nStyle = CRectTracker::resizeInside | CRectTracker::dottedLine; } CDemoView::~CDemoView() { } BOOL CDemoView::PreCreateWindow(CREATESTRUCT& cs) { // TODO: Modify the Window class or styles here by modifying // the CREATESTRUCT cs return CView::PreCreateWindow(cs); } ///////////////////////////////////////////////////////////////////////////// // CDemoView drawing void CDemoView::OnDraw(CDC* pDC) { //获得Tracker矩形 CRect rect; m_RectTracker.GetTrueRect(rect); //绘制Tracker矩形 m_RectTracker.Draw(pDC); //创建画笔 CPen pen; pen.CreatePen(PS_SOLID, 1, RGB(255, 0, 0)); //创建画刷 CBrush brush; brush.CreateSolidBrush(RGB(255, 0, 0)); //选择画笔 CPen* pOldPen = pDC->SelectObject(&pen); //选择画刷 CBrush* pOldBrush = pDC->SelectObject(&brush); //绘制椭圆 pDC->Ellipse(rect); //恢复原来的画笔 pDC->SelectObject(pOldPen); //恢复原来的画刷 pDC->SelectObject(pOldBrush); } ///////////////////////////////////////////////////////////////////////////// // CDemoView printing BOOL CDemoView::OnPreparePrinting(CPrintInfo* pInfo) { // default preparation return DoPreparePrinting(pInfo); } void CDemoView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add extra initialization before printing } void CDemoView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) { // TODO: add cleanup after printing } ///////////////////////////////////////////////////////////////////////////// // CDemoView diagnostics #ifdef _DEBUG void CDemoView::AssertValid() const { CView::AssertValid(); } void CDemoView::Dump(CDumpContext& dc) const { CView::Dump(dc); } CDemoDoc* CDemoView::GetDocument() // non-debug version is inline { ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDemoDoc))); return (CDemoDoc*)m_pDocument; } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // CDemoView message handlers BOOL CDemoView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) { if (pWnd == this) { //设置光标 if (m_RectTracker.SetCursor(this, nHitTest)) { return TRUE; } } return CView::OnSetCursor(pWnd, nHitTest, message); } void CDemoView::OnLButtonDown(UINT nFlags, CPoint point) { //获得光标的当前位置 int nHit = m_RectTracker.HitTest(point); if (nHit != CRectTracker::hitNothing) { //操作矩形 m_RectTracker.Track (this, point, TRUE); } else { //选择橡皮筋矩形 m_RectTracker.TrackRubberBand(this, point, TRUE); } //刷新 Invalidate(); CView::OnLButtonDown(nFlags, point); }