void CContainerUI::Event(TEventUI& event)
{
if( m_hwndScroll != NULL )
{
if( event.Type == UIEVENT_VSCROLL )
{
switch( LOWORD(event.wParam) ) {
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
{
SCROLLINFO si = { 0 };
si.cbSize = sizeof(SCROLLINFO);
si.fMask = SIF_TRACKPOS;
::GetScrollInfo(m_hwndScroll, SB_CTL, &si);
SetScrollPos(si.nTrackPos);
}
break;
case SB_LINEUP:
SetScrollPos(GetScrollPos() - 5);
break;
case SB_LINEDOWN:
SetScrollPos(GetScrollPos() + 5);
break;
case SB_PAGEUP:
SetScrollPos(GetScrollPos() - GetScrollPage());
break;
case SB_PAGEDOWN:
SetScrollPos(GetScrollPos() + GetScrollPage());
break;
}
}
if( event.Type == UIEVENT_KEYDOWN )
{
switch( event.chKey ) {
case VK_DOWN:
SetScrollPos(GetScrollPos() + 5);
return;
case VK_UP:
SetScrollPos(GetScrollPos() - 5);
return;
case VK_NEXT:
SetScrollPos(GetScrollPos() + GetScrollPage());
return;
case VK_PRIOR:
SetScrollPos(GetScrollPos() - GetScrollPage());
return;
case VK_HOME:
SetScrollPos(0);
return;
case VK_END:
SetScrollPos(9999);
return;
}
}
}
CControlUI::Event(event);
}
void CDocWindow::ResetScrollPos(int nBar, int nPos, bool bRedraw)
{
int nMin = 0;
int nMax = 0;
GetScrollRange(nBar, &nMin, &nMax);
if (nPos < nMin)
nPos = nMin;
int nPage = GetScrollPage(nBar);
if (nPos > nMax + 1 - nPage)
nPos = nMax + 1 - nPage;
SetScrollPos(nBar, nPos, bRedraw);
}
void CDocWindow::SetupScrollbars(int xPos, int yPos, int xSize, int ySize, int xVisible, int yVisible, bool bRedraw)
{
// If no (x,y) position was passed in, set the position to be the center of the current page
if (xPos < 0 && yPos < 0)
{
xPos = GetScrollPos(SB_HORZ) + GetScrollPage(SB_HORZ)/2 - xVisible/2;
yPos = GetScrollPos(SB_VERT) + GetScrollPage(SB_VERT)/2 - yVisible/2;
}
// Set the scroll range
SetScrollRange(SB_HORZ, 0, xSize-1, false);
SetScrollRange(SB_VERT, 0, ySize-1, false);
// Set the scroll page size
SetScrollPage(SB_HORZ, xVisible, false);
SetScrollPage(SB_VERT, yVisible, false);
// Reset the scroll position and be sure it is valid
ResetScrollPos(SB_HORZ, xPos, bRedraw);
ResetScrollPos(SB_VERT, yPos, bRedraw);
}
LRESULT CDocWindow::OnScroll(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
UINT ScrollCode = LOWORD(wParam);
UINT TrackCode = HIWORD(wParam);
// SB_LINERIGHT, SB_LINEDOWN Scrolls one line right/down
// SB_LINELEFT, SB_LINEUP Scrolls one line up/left
// SB_PAGERIGHT, SB_PAGEDOWN Scrolls one page right/down
// SB_PAGELEFT, SB_PAGEUP Scrolls one page left/up
// SB_LEFT, SB_TOP Scrolls to the start
// SB_RIGHT, SB_BOTTOM Scrolls to the end
// SB_ENDSCROLL Ends scroll
// SB_THUMBPOSITION The user has dragged the scroll box (thumb) and released the mouse button
// The high-order word indicates the position of the scroll box at the end of the drag operation
// SB_THUMBTRACK The user is dragging the scroll box
// This message is sent repeatedly until the user releases the mouse button
// The high-order word indicates the position that the scroll box has been dragged to
int nMin = 0;
int nMax = 0;
if (uMsg == WM_HSCROLL)
{
GetScrollRange(SB_HORZ, &nMin, &nMax);
int nPage = GetScrollPage(SB_HORZ);
int nPos = GetScrollPos(SB_HORZ);
switch (ScrollCode)
{
case SB_LINERIGHT:
case SB_LINELEFT:
{
if (SB_LINERIGHT == ScrollCode)
nPos += 100;
else
nPos -= 100;
break;
}
case SB_PAGERIGHT:
case SB_PAGELEFT:
{
if (SB_PAGERIGHT == ScrollCode)
nPos += nPage;
else
nPos -= nPage;
break;
}
case SB_RIGHT:
case SB_LEFT:
{
if (SB_RIGHT == ScrollCode)
nPos = nMax;
else
nPos = nMin;
break;
}
case SB_THUMBTRACK:
case SB_THUMBPOSITION:
{
nPos = TrackCode;
break;
}
default:
return S_OK;
}
if (nPos > nMax + 1 - nPage)
nPos = nMax + 1 - nPage;
if (nPos < nMin)
nPos = nMin;
SetScrollPos(SB_HORZ, nPos, true);
}
else
if (uMsg == WM_VSCROLL)
{
GetScrollRange(SB_VERT, &nMin, &nMax);
int nPage = GetScrollPage(SB_VERT);
int nPos = GetScrollPos(SB_VERT);
switch (ScrollCode)
{
case SB_LINEDOWN:
case SB_LINEUP:
{
if (SB_LINEDOWN == ScrollCode)
nPos += 100;
else
nPos -= 100;
break;
}
case SB_PAGEDOWN:
case SB_PAGEUP:
{
if (SB_PAGEDOWN == ScrollCode)
nPos += nPage;
else
nPos -= nPage;
break;
}
case SB_BOTTOM:
case SB_TOP:
{
if (SB_BOTTOM == ScrollCode)
nPos = nMax;
else
nPos = nMin;
break;
}
case SB_THUMBTRACK:
case SB_THUMBPOSITION:
{
nPos = TrackCode;
break;
}
default:
return S_OK;
}
if (nPos > nMax + 1 - nPage)
nPos = nMax + 1 - nPage;
if (nPos < nMin)
nPos = nMin;
SetScrollPos(SB_VERT, nPos, true);
}
SetupPageView(false/*bSetScrollbars*/);
return S_OK;
}
/***
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;
}
}
