void vtElevLayer::ReRender()
{
if (IsGrid())
{
m_bBitmapRendered = false;
m_bNeedsDraw = true;
}
}
/**
* This get the flexibilty of the row at aIndex. It's not trivial. There are a few
* things we need to look at. Specifically we need to see if any <rows> or <columns>
* tags are around us. Their flexibilty will affect ours.
*/
nscoord
nsGrid::GetRowFlex(nsBoxLayoutState& aState, PRInt32 aIndex, bool aIsHorizontal)
{
RebuildIfNeeded();
nsGridRow* row = GetRowAt(aIndex, aIsHorizontal);
if (row->IsFlexSet())
return row->mFlex;
nsIBox* box = row->mBox;
row->mFlex = 0;
if (box) {
// We need our flex but a inflexible row could be around us. If so
// neither are we. However if its the row tag just inside the grid it won't
// affect us. We need to do this for this case:
// <grid>
// <rows>
// <rows> // this is not flexible. So our children should not be flexible
// <row flex="1"/>
// <row flex="1"/>
// </rows>
// <row/>
// </rows>
// </grid>
//
// or..
//
// <grid>
// <rows>
// <rows> // this is not flexible. So our children should not be flexible
// <rows flex="1">
// <row flex="1"/>
// <row flex="1"/>
// </rows>
// <row/>
// </rows>
// </row>
// </grid>
// So here is how it looks
//
// <grid>
// <rows> // parentsParent
// <rows> // parent
// <row flex="1"/>
// <row flex="1"/>
// </rows>
// <row/>
// </rows>
// </grid>
// so the answer is simple: 1) Walk our parent chain. 2) If we find
// someone who is not flexible and they aren't the rows immediately in
// the grid. 3) Then we are not flexible
box = GetScrollBox(box);
nsIBox* parent = box->GetParentBox();
nsIBox* parentsParent=nsnull;
while(parent)
{
parent = GetScrollBox(parent);
parentsParent = parent->GetParentBox();
// if our parents parent is not a grid
// the get its flex. If its 0 then we are
// not flexible.
if (parentsParent) {
if (!IsGrid(parentsParent)) {
nscoord flex = parent->GetFlex(aState);
nsIBox::AddCSSFlex(aState, parent, flex);
if (flex == 0) {
row->mFlex = 0;
return row->mFlex;
}
} else
break;
}
parent = parentsParent;
}
// get the row flex.
row->mFlex = box->GetFlex(aState);
nsIBox::AddCSSFlex(aState, box, row->mFlex);
}
return row->mFlex;
}
