Visual C++ 光标

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2.7 如何获得光标的坐标

在鼠标相关事件中获取坐标

void CDemoView::OnMouseMove(UINT nFlags, CPoint point) {    //保存光标坐标    m_Point    = point;    //刷新客户区    Invalidate();    CView::OnMouseMove(nFlags, point);}

2.8 如何限制光标的移动范围

ClipCursor方法

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point) {    //获得客户区坐标    CRect rect;    GetClientRect(rect);    rect.left = rect.left + rect.Width() / 4;    rect.right = rect.right - rect.Width() / 4;    rect.top = rect.top + rect.Height() / 4;    rect.bottom = rect.bottom - rect.Height() / 4;    //映射屏幕坐标    ClientToScreen(rect);    //限制光标移动范围    ClipCursor(&rect);    CView::OnLButtonDown(nFlags, point);}

2.9 如何使用预定义光标

LoadStandardCursor同LoadCursor
SetCursor
GetCursor

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point) {    //加载光标     m_hCursor = AfxGetApp()->LoadStandardCursor(IDC_CROSS);        //设置光标    ::SetCursor(m_hCursor);    CView::OnLButtonDown(nFlags, point);}void CDemoView::OnLButtonUp(UINT nFlags, CPoint point) {    //加载光标    m_hCursor = AfxGetApp()->LoadStandardCursor(IDC_SIZENWSE);    //设置光标     ::SetCursor(m_hCursor);    CView::OnLButtonUp(nFlags, point);}

2.10 如何使用自定义光标

同上,只不过光标属性是自定义的资源,使用LoadCursor方法载入

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point) {    //加载光标     m_hCursor = AfxGetApp()->LoadCursor(IDC_CURSOR2);    //设置光标    ::SetCursor(m_hCursor);    CView::OnLButtonDown(nFlags, point);}void CDemoView::OnLButtonUp(UINT nFlags, CPoint point) {    //加载光标    m_hCursor = AfxGetApp()->LoadCursor(IDC_CURSOR1);    //设置光标     ::SetCursor(m_hCursor);    CView::OnLButtonUp(nFlags, point);}

2.11 如何使用等待光标

使用BeginWaitCursor和EndWaitCursor方法

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point) {    //启动等待光标    BeginWaitCursor();    //休眠    Sleep(2000);    //结束等待光标    EndWaitCursor();    CView::OnLButtonDown(nFlags, point);}

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