象大智慧之类的股票软件里,股票曲线图中可移动竖线是如何做的?

Question

象大智慧之类的股票软件里,股票曲线图中可移动竖线是如何做的?

Answer 1

有一个办法：
void CMySingleViewView::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
//m_OldPoint = point;
static int count = 0;
count ++;
CRect rect;
GetClientRect(&rect);
//ScreenToClient(&rect);
CDC * pDC = GetDC();
pDC->MoveTo(0,point.y);
pDC->LineTo(rect.right,point.y); pDC->MoveTo(point.x, 0);
pDC->LineTo(point.x, rect.bottom);
if (count % 3 == 0)
{

this->Invalidate();
}
CView::OnMouseMove(nFlags, point);
}

Answer 2

用很多开发软件自带一些此类的控件的，很好用～
比如CVI，带一些常用的仪表、曲线图之类的控件

Answer 3

CClientDC dc(this);
dc.SetROP2( R2_NOT );
dc.MoveTo(0,m_OldPoint.y);
dc.LineTo(2000,m_OldPoint.y);
dc.MoveTo(m_OldPoint.x,0);
dc.LineTo(m_OldPoint.x,900);
dc.MoveTo(0,point.y);
dc.LineTo(2000,point.y);
dc.MoveTo(point.x,0);
dc.LineTo(point.x,900);
m_OldPoint = point;