Question

vc++鼠标移动

在void CAsdView::OnMouseMove(UINT nFlags, CPoint point)
{
CView::OnMouseMove(nFlags, point);
}
实现鼠标控制矩形的移动就是
鼠标移动到哪里图形移动到哪里

Answer 1

例如：
给CAsdView添加2个int变量x,y保存当前坐标。

OnMouseMove里：
x=point.x;
y=point.y;
Invalidate();

OnDraw里：
Rectangle(pDC->m_hDC,x,y,x+50,y+50);

Answer 2

你说的是拉框吧
void CCh1_1View::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CClientDC dc(this);

if (m_nStep != 0)
{
dc.SetROP2(R2_NOTXORPEN);
dc.SelectStockObject(NULL_BRUSH);
if (m_Rect.right != 0)
{
dc.Rectangle(m_Rect.left, m_Rect.top, m_Rect.right, m_Rect.bottom);
}

m_Rect.right = point.x;
m_Rect.bottom = point.y;

dc.Rectangle(m_Rect.left, m_Rect.top, m_Rect.right, m_Rect.bottom);
}

CScrollView::OnMouseMove(nFlags, point);
}

Answer 3

void CAsdView::OnMouseMove(UINT nFlags, CPoint point)
{

CClientDC dc(this);
dc.Rectangle(point.x-10,point.y-10,point.x+10,point.y+10);

CView::OnMouseMove(nFlags, point);
}

如果是拉框还得用到OnLButtonDown和OnLButtonUp两个消息响应函数

Answer 4

参见CRectTracker类