BOOL CRectItem::UpdateExtent()
{
// get size in pixels
CSize size;
if (!GetCachedExtent(&size))
return FALSE; // blank
Invalidate(); // invalidate the old size/position
CSize sizeBase = GetBaseSize();
if (size == sizeBase) // no change
return FALSE;
// if new object (i.e. m_extent is empty) setup position
if (sizeBase == CSize(0,0))
{
// convert to document coords
CSize sizeNew(MulDiv(size.cx, 10, 254), - MulDiv(size.cy, 10, 254));
SetSize(sizeNew);
}
else
{
if (!IsInPlaceActive() && size != sizeBase)
{
// data changed and not inplace, so scale up rect as well
CSize sizeCur = GetSize();
sizeCur.cx = MulDiv(sizeCur.cx, size.cx, sizeBase.cx);
sizeCur.cy = - MulDiv(-sizeCur.cy, size.cy, sizeBase.cy);
SetSize(sizeCur);
}
}
SetBaseSize(size);
Invalidate(); // as well as the new size/position
return TRUE;
}
//////////////////////////////////////////////////////////////////////////////////
//功 能：
//////////////////////////////////////////////////////////////////////////////////
BOOL CCtrlItem::UpdateExtent()
{
if (m_lpViewObject == NULL)
return TRUE;
CSize size;
//下行调用m_lpViewObject，此时m_lpViewObject对部分控件可能为空
if (GetCachedExtent(&size))
{
// OLE returns the extent in HIMETRIC units -- we need pixels.
CClientDC dc(NULL);
dc.HIMETRICtoDP(&size);
// Only invalidate if it has actually changed and also only if it is not
// in-place active.
CSize szTmp;
szTmp.cx = int(m_pCtrlObj->m_position.Size().cx);
szTmp.cy = int(m_pCtrlObj->m_position.Size().cy);
if ((size != szTmp) && !IsInPlaceActive())
{
// Invalidate old, update, invalidate new.
m_pCtrlObj->Invalidate();
m_pCtrlObj->m_position.bottom = m_pCtrlObj->m_position.top + size.cy;
m_pCtrlObj->m_position.right = m_pCtrlObj->m_position.left + size.cx;
m_pCtrlObj->Invalidate();
// mark document as modified.
GetDocument()->SetModifiedFlag();
}
}
return TRUE;
}
void CContainerItem::UpdateFromServerExtent()
{
CSize size;
if (GetCachedExtent(&size))
{
// OLE returns the extent in HIMETRIC units -- we need pixels
CClientDC dc(NULL);
dc.HIMETRICtoDP(&size);
// Only invalidate if it has actually changed, and also
// only if it is not in-place active. When in-place active, the
// container item size should sync with the "window size" of the
// object. Only when not in-place active should the container
// item size should sync with the natural size of the object.
if ((size != m_rect.Size()) && !IsInPlaceActive())
{
// invalidate old, update, invalidate new
InvalidateItem();
m_rect.bottom = m_rect.top + size.cy;
m_rect.right = m_rect.left + size.cx;
InvalidateItem();
// mark document as modified
GetDocument()->SetModifiedFlag();
}
}
}