RT,在视图(派生于CScrollView)中有个自动生成的垂直滚动条,我在其OnVScroll事件中设置其位置,我屏蔽掉了这里调用CScrollView::OnVScroll代码,自己处理。问题是我怎么获取到这个滚动条的对象呢?直接用this不行,它调用的是CWND
的,需要一个ID参数,使用pScrollBar也不行,返回空,我还想知道这个函数中的三个参数是给我用的,还是我要设置的?
的,需要一个ID参数,使用pScrollBar也不行,返回空,我还想知道这个函数中的三个参数是给我用的,还是我要设置的?
void CGMMediaUploadDlg::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
// TODO: Add your message handler code here and/or call default SCROLLINFO scrollinfo;
GetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);
switch (nSBCode)
{
case SB_BOTTOM:
ScrollWindow(0,(scrollinfo.nPos-scrollinfo.nMax)*10);
scrollinfo.nPos = scrollinfo.nMax;
SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);
break;
case SB_TOP:
ScrollWindow(0,(scrollinfo.nPos-scrollinfo.nMin)*10);
scrollinfo.nPos = scrollinfo.nMin;
SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);
break;
case SB_LINEUP:
scrollinfo.nPos -= 1;
if (scrollinfo.nPos<scrollinfo.nMin)
{
scrollinfo.nPos = scrollinfo.nMin;
break;
}
SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);
ScrollWindow(0,15);
break;
case SB_LINEDOWN:
scrollinfo.nPos += 1;
if (scrollinfo.nPos>scrollinfo.nMax)
{
scrollinfo.nPos = scrollinfo.nMax;
break;
}
SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);
ScrollWindow(0,-15);
break;
case SB_PAGEUP:
scrollinfo.nPos -= 5;
if (scrollinfo.nPos<scrollinfo.nMin)
{
scrollinfo.nPos = scrollinfo.nMin;
break;
}
SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);
ScrollWindow(0,10*5);
break;
case SB_PAGEDOWN:
scrollinfo.nPos += 5;
if (scrollinfo.nPos>scrollinfo.nMax)
{
scrollinfo.nPos = scrollinfo.nMax;
break;
}
SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);
ScrollWindow(0,-10*5);
break;
case SB_ENDSCROLL:
// MessageBox("SB_ENDSCROLL");
break;
case SB_THUMBPOSITION:
// ScrollWindow(0,(scrollinfo.nPos-nPos)*10);
// scrollinfo.nPos = nPos;
// SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);
break;
case SB_THUMBTRACK:
ScrollWindow(0,(scrollinfo.nPos-nPos)*15);
scrollinfo.nPos = nPos;
SetScrollInfo(SB_VERT,&scrollinfo,SIF_ALL);
break;
} CDialog::OnVScroll(nSBCode, nPos, pScrollBar);
}