怎样做一个动态的线，看起来就像在流动一样

[yjinf]

谁有例子？

[icr_mio]

不断在不同位置画虚线
试试

[guohua24]

SetTimer( )
Invalidate( )

[ForFar]

设个定时器，然后不断刷新线条所在的坐标，产生动态效果

[jvcit]

不断更新

[闻缺陷则喜何志丹]

先在对话框中加一个按钮,ID IDC_OWNER,把自画属性选上
在对话框的WM_DRAWITEM中加如下代码.
void CCsdnDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)
{
if(IDC_OWNER == nIDCtl)
{
CDC dc;
dc.Attach(lpDrawItemStruct->hDC);
CRect r;
GetDlgItem(IDC_OWNER)->GetClientRect(&r);


CTime t =CTime::GetCurrentTime();//避免随机数相同,根据当前时间的秒数,先调用几次
int n = t.GetSecond();
for(int i = 0 ; i < n ; i++)
rand();

int maxX = r.right;
int maxY = r.bottom;
CPoint beginPoint,endPoint;
beginPoint.x = rand()%maxX;
beginPoint.y = rand()%maxY;
endPoint.x = rand()%maxX;
endPoint.y = rand()%maxY;

dc.MoveTo(beginPoint);
dc.LineTo(endPoint);
}

CDialog::OnDrawItem(nIDCtl, lpDrawItemStruct);

CCsdnDlg::OnInitDialog()
{
CDialog::OnInitDialog();
SetTimer(1,1100,NULL);

...
}
对话框的WM_TIMER中
void CCsdnDlg::OnTimer(UINT nIDEvent)
{
Invalidate(true);
CDialog::OnTimer(nIDEvent);


}
}

[zgh266]

up