void CTreeWnd::SetFirstVisibleNode()
{
m_firstVisibleIdx = 0;
int index = GetScrollPos32(SB_VERT);
CTreeNode* pNode = GetRootNode();
if (!pNode)
return;
if (!(m_style & MTS_SHOWROOT))
pNode = pNode->FirstChild();
m_firstVisible = pNode;
int pos = 0;
while (pNode && pos < index)
{
pos ++;//= DEF_NODE_HEIGHT;
pNode = pNode->NextNode();
if (pNode)
{
m_firstVisible = pNode;
m_firstVisibleIdx++;
}
}
}
void CCurveButton::DrawItem(LPDRAWITEMSTRUCT lpDIS)
{
CDC * pDC = GetDC();
if( NULL == pDC )
return;
CRect rectClient;
GetClientRect( &rectClient );
pDC->FillSolidRect( rectClient, AfxGetProfile().GetColor(CColorClass::clrGraphBK) );
int scrollpos = GetScrollPos32( SB_HORZ );
DrawCurve( pDC, rectClient, scrollpos );
}
int CGraphListCtrl::GetMinVisibleItem()
{
CSize sizeItem = GetItemSizeWithCaption();
if (!m_bSortByFixedRow)
{
int nVertScroll = GetScrollPos32(SB_VERT);
int nRow = nVertScroll / sizeItem.cy;
return nRow * m_nFixedColNum;
}
else
{
int nHorzScroll = GetScrollPos(SB_HORZ);
int nCol = nHorzScroll / sizeItem.cx;
return nCol * m_nFixedRowNum;
}
}
void CGraphListCtrl::OnScroll( UINT nFlags, short zDelta )
{
int nBar = m_bSortByFixedRow ? SB_HORZ : SB_VERT;
int nMaxPos = m_bSortByFixedRow ? m_nHScrollMax : m_nVScrollMax;
int nMinPos = 0;
int nScrolPos = GetScrollPos32(nBar);
nScrolPos -= zDelta;
if (0 > nScrolPos)
nScrolPos = 0;
else if (nMaxPos < nScrolPos)
nScrolPos = nMaxPos;
SetScrollPos32(nBar, nScrolPos, TRUE);
Invalidate();
}
void CGraphListCtrl::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
int scrollPos = GetScrollPos32(SB_VERT);
CSize size = GetItemSizeWithCaption();
CRect rt;
GetClientRect(rt);
int nPageHeight = rt.Height() - rt.Height() % size.cy;
if (rt.Height() < size.cy)
{
nPageHeight = size.cy;
}
switch (nSBCode)
{
case SB_LINEDOWN:
if (scrollPos < m_nVScrollMax)
{
int yScroll = size.cy;
SetScrollPos32(SB_VERT, scrollPos + yScroll);
if (GetScrollPos32(SB_VERT) == scrollPos)
{
break; // didn't work
}
}
break;
case SB_LINEUP:
{
int yScroll = size.cy;
SetScrollPos32(SB_VERT, max(0, scrollPos - yScroll));
//RedrawWindow(NULL, NULL, RDW_ RDW_FRAME);
}
break;
case SB_PAGEDOWN:
if (scrollPos < m_nVScrollMax)
{
scrollPos = min(m_nVScrollMax, scrollPos + size.cy);
SetScrollPos32(SB_VERT, scrollPos);
}
break;
case SB_PAGEUP:
if (scrollPos > 0)
{
scrollPos = max(0, scrollPos - size.cy);
SetScrollPos32(SB_VERT, scrollPos);
}
break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
{
SetScrollPos32(SB_VERT, GetScrollPos32(SB_VERT, TRUE));
}
break;
case SB_TOP:
if (scrollPos > 0)
{
SetScrollPos32(SB_VERT, 0);
}
break;
case SB_BOTTOM:
if (scrollPos < m_nVScrollMax)
{
SetScrollPos32(SB_VERT, m_nVScrollMax);
}
default:
break;
}
Invalidate();
}
void CGraphListCtrl::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
int scrollPos = GetScrollPos32(SB_HORZ);
CSize size = GetItemSizeWithCaption();
CRect rt;
GetClientRect(rt);
int nPageWid = rt.Width() - (rt.Width() % size.cx);
if (rt.Width() < size.cx)
{
nPageWid = size.cx;
}
// mod by yanghailong.2010.08.30
// 对图片来说，显示半张是没有意义的。
switch (nSBCode)
{
case SB_LINERIGHT:
if (scrollPos < m_nHScrollMax)
{
int xScroll = size.cx;
SetScrollPos32(SB_HORZ, scrollPos + xScroll);
if (GetScrollPos32(SB_HORZ) == scrollPos)
break; // didn't work
}
break;
case SB_LINELEFT:
SetScrollPos32(SB_HORZ, max(0, scrollPos - size.cx));
break;
case SB_PAGERIGHT:
if (scrollPos < m_nHScrollMax)
{
int pos = min(m_nHScrollMax, scrollPos + nPageWid);
SetScrollPos32(SB_HORZ, pos);
}
break;
case SB_PAGELEFT:
if (scrollPos > 0)
{
int pos = max(0, scrollPos - nPageWid);
SetScrollPos32(SB_HORZ, pos);
}
break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
{
SetScrollPos32(SB_HORZ, nPos);
}
break;
case SB_LEFT:
if (scrollPos > 0)
{
SetScrollPos32(SB_HORZ, 0);
}
break;
case SB_RIGHT:
if (scrollPos < m_nHScrollMax)
{
SetScrollPos32(SB_HORZ, m_nHScrollMax);
}
break;
default:
break;
}
Invalidate();
}
int CGraphListCtrl::GetTopRowNum()
{
int nVertScroll = GetScrollPos32(SB_VERT);
CSize size = GetItemSizeWithCaption();
return nVertScroll / size.cy;
}
int CGraphListCtrl::GetTopColumnNum()
{
int nHorzScroll = GetScrollPos32(SB_HORZ);
CSize size = GetItemSizeWithCaption();
return nHorzScroll / size.cx;
}
/***
响应垂直滚动条消息
*/
void CCurveButton::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
int scrollPos = GetScrollPos32(SB_HORZ);
switch (nSBCode)
{
case SB_LINERIGHT:
if( scrollPos < m_nHScrollMax )
{
SetScrollPos32(SB_HORZ, scrollPos + 1);
if( GetScrollPos32(SB_HORZ) != scrollPos )
Invalidate( );
}
break;
case SB_LINELEFT:
if( scrollPos > 0 )
{
SetScrollPos32(SB_HORZ, max(0,scrollPos - 1));
Invalidate( );
}
break;
case SB_PAGERIGHT:
if( scrollPos < m_nHScrollMax )
{
int pos = min(m_nHScrollMax, scrollPos + GetScrollPage(SB_HORZ));
SetScrollPos32( SB_HORZ, pos);
Invalidate( );
}
break;
case SB_PAGELEFT:
if (scrollPos > 0)
{
int pos = max(0, scrollPos - GetScrollPage(SB_HORZ));
SetScrollPos32(SB_HORZ, pos);
Invalidate( );
}
break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
{
SetScrollPos32(SB_HORZ, GetScrollPos32(SB_HORZ, TRUE));
Invalidate( );
}
break;
case SB_LEFT:
if (scrollPos > 0)
{
SetScrollPos32(SB_HORZ, 0);
Invalidate();
}
break;
case SB_RIGHT:
if (scrollPos < m_nHScrollMax)
{
SetScrollPos32(SB_HORZ, m_nHScrollMax);
Invalidate();
}
break;
default: break;
}
}
