捕获鼠标

View Code 
 1 void CKeyBoard_Mouse_MessageView::OnLButtonDown(UINT nFlags, CPoint point) 
 2 {
 3     SetCapture();//捕获鼠标，防止鼠标离开窗口区域捕获不到，无论鼠标在何位置，其产生的消息均发给捕获它的窗口
 4     GetClipCursor(&oldrect);//获得原来鼠标的活动范围
 5     CRect rect;
 6     GetWindowRect(&rect);
 7     ClipCursor(&rect);//将鼠标的移动限制在客户区
 8     fDowned=true;
 9     ptUp=ptDown=point;
10     CView::OnLButtonDown(nFlags, point);
11 }
12 
13 void CKeyBoard_Mouse_MessageView::OnLButtonUp(UINT nFlags, CPoint point) 
14 {
15     ReleaseCapture();//释放鼠标与SetCapture()配合使用
16     ClipCursor(&oldrect);//恢复鼠标的活动区域
17     if (fDowned)
18     {
19         ptUp=point;
20         DrawRec();
21         fDowned=false;
22     }
23     CView::OnLButtonUp(nFlags, point);
24 }

 

posted on 2011-12-29 20:05  Sunny_NUAA  阅读(250)  评论(0)  编辑  收藏  举报

导航