void CSizingControlBar::StartTracking(UINT nHitTest, CPoint point)
{
SetCapture();
// make sure no updates are pending
if (!m_bDragShowContent)
RedrawWindow(NULL, NULL, RDW_ALLCHILDREN | RDW_UPDATENOW);
m_htEdge = nHitTest;
m_bTracking = TRUE;
BOOL bHorz = IsHorzDocked();
BOOL bHorzTracking = m_htEdge == HTLEFT || m_htEdge == HTRIGHT;
m_nTrackPosOld = bHorzTracking ? point.x : point.y;
CRect rcBar, rcEdge;
GetWindowRect(rcBar);
GetEdgeRect(rcBar, m_htEdge, rcEdge);
m_nTrackEdgeOfs = m_nTrackPosOld -
(bHorzTracking ? rcEdge.CenterPoint().x : rcEdge.CenterPoint().y);
CSCBArray arrSCBars;
int nThis;
GetRowSizingBars(arrSCBars, nThis);
m_nTrackPosMin = m_nTrackPosMax = m_nTrackPosOld;
if (!IsSideTracking())
{
// calc minwidth as the max minwidth of the sizing bars on row
int nMinWidth = bHorz ? m_szMinHorz.cy : m_szMinVert.cx;
for (int i = 0; i < arrSCBars.GetSize(); i++)
nMinWidth = max(nMinWidth, bHorz ?
arrSCBars[i]->m_szMinHorz.cy :
arrSCBars[i]->m_szMinVert.cx);
int nExcessWidth = (bHorz ? m_szHorz.cy : m_szVert.cx) - nMinWidth;
// the control bar cannot grow with more than the width of
// remaining client area of the mainframe
CRect rcT;
m_pDockSite->RepositionBars(0, 0xFFFF, AFX_IDW_PANE_FIRST,
reposQuery, &rcT, NULL, TRUE);
int nMaxWidth = bHorz ? rcT.Height() - 2 : rcT.Width() - 2;
BOOL bTopOrLeft = m_htEdge == HTTOP || m_htEdge == HTLEFT;
m_nTrackPosMin -= bTopOrLeft ? nMaxWidth : nExcessWidth;
m_nTrackPosMax += bTopOrLeft ? nExcessWidth : nMaxWidth;
}
else
{
// side tracking:
// max size is the actual size plus the amount the other
// sizing bars can be decreased until they reach their minsize
if (m_htEdge == HTBOTTOM || m_htEdge == HTRIGHT)
nThis++;
for (int i = 0; i < arrSCBars.GetSize(); i++)
{
CSizingControlBar* pBar = arrSCBars[i];
int nExcessWidth = bHorz ?
pBar->m_szHorz.cx - pBar->m_szMinHorz.cx :
pBar->m_szVert.cy - pBar->m_szMinVert.cy;
if (i < nThis)
m_nTrackPosMin -= nExcessWidth;
else
m_nTrackPosMax += nExcessWidth;
}
}
OnTrackInvertTracker(); // draw tracker
}
void CSizingControlBar::OnTrackUpdateSize(CPoint& point)
{
ASSERT(!IsFloating());
BOOL bHorzTrack = m_htEdge == HTLEFT || m_htEdge == HTRIGHT;
int nTrackPos = bHorzTrack ? point.x : point.y;
nTrackPos = max(m_nTrackPosMin, min(m_nTrackPosMax, nTrackPos));
int nDelta = nTrackPos - m_nTrackPosOld;
if (nDelta == 0)
return; // no pos change
OnTrackInvertTracker(); // erase tracker
m_nTrackPosOld = nTrackPos;
BOOL bHorz = IsHorzDocked();
CSize sizeNew = bHorz ? m_szHorz : m_szVert;
switch (m_htEdge)
{
case HTLEFT: sizeNew -= CSize(nDelta, 0); break;
case HTTOP: sizeNew -= CSize(0, nDelta); break;
case HTRIGHT: sizeNew += CSize(nDelta, 0); break;
case HTBOTTOM: sizeNew += CSize(0, nDelta); break;
}
CSCBArray arrSCBars;
int nThis;
GetRowSizingBars(arrSCBars, nThis);
if (!IsSideTracking())
for (int i = 0; i < arrSCBars.GetSize(); i++)
{
CSizingControlBar* pBar = arrSCBars[i];
// make same width (or height)
(bHorz ? pBar->m_szHorz.cy : pBar->m_szVert.cx) =
bHorz ? sizeNew.cy : sizeNew.cx;
}
else
{
int nGrowingBar = nThis;
BOOL bBefore = m_htEdge == HTTOP || m_htEdge == HTLEFT;
if (bBefore && nDelta > 0)
nGrowingBar--;
if (!bBefore && nDelta < 0)
nGrowingBar++;
if (nGrowingBar != nThis)
bBefore = !bBefore;
// nGrowing is growing
nDelta = abs(nDelta);
CSizingControlBar* pBar = arrSCBars[nGrowingBar];
(bHorz ? pBar->m_szHorz.cx : pBar->m_szVert.cy) += nDelta;
// the others are shrinking
int nFirst = bBefore ? nGrowingBar - 1 : nGrowingBar + 1;
int nLimit = bBefore ? -1 : arrSCBars.GetSize();
for (int i = nFirst; nDelta != 0 && i != nLimit; i += (bBefore ? -1 : 1))
{
CSizingControlBar* pBar = arrSCBars[i];
int nDeltaT = min(nDelta,
(bHorz ? pBar->m_szHorz.cx : pBar->m_szVert.cy) -
(bHorz ? pBar->m_szMinHorz.cx : pBar->m_szMinVert.cy));
(bHorz ? pBar->m_szHorz.cx : pBar->m_szVert.cy) -= nDeltaT;
nDelta -= nDeltaT;
}
}
OnTrackInvertTracker(); // redraw tracker at new pos
if (m_bDragShowContent)
m_pDockSite->DelayRecalcLayout();
}