BOOL CXTPPropertyPage::OnScrollBy(CSize sizeScroll, BOOL bDoScroll)
{
int xOrig, x;
int yOrig, y;
// don't scroll if there is no valid scroll range (ie. no scroll bar)
CScrollBar* pBar;
DWORD dwStyle = GetStyle();
pBar = GetScrollBarCtrl(SB_VERT);
if ((pBar != NULL && !pBar->IsWindowEnabled()) ||
(pBar == NULL && !(dwStyle & WS_VSCROLL)))
{
// vertical scroll bar not enabled
sizeScroll.cy = 0;
}
pBar = GetScrollBarCtrl(SB_HORZ);
if ((pBar != NULL && !pBar->IsWindowEnabled()) ||
(pBar == NULL && !(dwStyle & WS_HSCROLL)))
{
// horizontal scroll bar not enabled
sizeScroll.cx = 0;
}
// adjust current x position
xOrig = x = GetScrollPos(SB_HORZ);
int xMax = GetScrollLimit(SB_HORZ);
x += sizeScroll.cx;
if (x < 0)
x = 0;
else if (x > xMax)
x = xMax;
// adjust current y position
yOrig = y = GetScrollPos(SB_VERT);
int yMax = GetScrollLimit(SB_VERT);
y += sizeScroll.cy;
if (y < 0)
y = 0;
else if (y > yMax)
y = yMax;
// did anything change?
if (x == xOrig && y == yOrig)
return FALSE;
if (bDoScroll)
{
// do scroll and update scroll positions
ScrollPage(-(x-xOrig), -(y-yOrig));
if (x != xOrig)
SetScrollPos(SB_HORZ, x);
if (y != yOrig)
SetScrollPos(SB_VERT, y);
}
return TRUE;
}
void COXTabViewContainer::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default
if((int)nIDEvent==m_nScrollPageTimer)
{
if(m_nPressedScrlBtn!=NONE && m_bIsScrlBtnPressed)
ScrollPage(m_nPressedScrlBtn);
}
CWnd::OnTimer(nIDEvent);
}
void CXTPPropertyPage::ScrollToDevicePosition(POINT ptDev)
{
ASSERT(ptDev.x >= 0);
ASSERT(ptDev.y >= 0);
// Note: ScrollToDevicePosition can and is used to scroll out-of-range
// areas as far as CXTPPropertyPage is concerned -- specifically in
// the print-preview code. Since OnScrollBy makes sure the range is
// valid, ScrollToDevicePosition does not vector through OnScrollBy.
int xOrig = GetScrollPos(SB_HORZ);
SetScrollPos(SB_HORZ, ptDev.x);
int yOrig = GetScrollPos(SB_VERT);
SetScrollPos(SB_VERT, ptDev.y);
ScrollPage(xOrig - ptDev.x, yOrig - ptDev.y);
}
void COXTabViewContainer::StartTracking(const CPoint& point)
{
ASSERT(m_nPressedScrlBtn==NONE);
m_nPressedScrlBtn=NONE;
int hitTest=HitTest(point);
if(hitTest==SCRLSTARTBTN || hitTest==SCRLBACKWARDBTN ||
hitTest==SCRLFORWARDBTN || hitTest==SCRLENDBTN)
{
SetCapture();
m_nPressedScrlBtn=(HITTEST)hitTest;
m_bIsScrlBtnPressed=TRUE;
RedrawScrollButton(m_nPressedScrlBtn);
ScrollPage(m_nPressedScrlBtn);
m_nScrollPageTimer=SetTimer(IDT_SCROLLPAGE_TIMER,
ID_SCROLLPAGE_DELAY,NULL);
}
else if(hitTest==SPLITTER)
{
SetCapture();
m_bIsSplitterPressed=TRUE;
}
}
