NS_IMETHODIMP
nsListBoxBodyFrame::AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
nsresult rv = NS_OK;
if (aAttribute == nsGkAtoms::rows) {
nsAutoString rows;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::rows, rows);
if (!rows.IsEmpty()) {
PRInt32 dummy;
PRInt32 count = rows.ToInteger(&dummy);
PRInt32 rowHeight = GetRowHeightAppUnits();
rowHeight = nsPresContext::AppUnitsToIntCSSPixels(rowHeight);
nsAutoString value;
value.AppendInt(rowHeight*count);
mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::minheight, value, PR_FALSE);
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eStyleChange, NS_FRAME_IS_DIRTY);
}
}
else
rv = nsBoxFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
return rv;
}
nsSize
nsListBoxBodyFrame::GetPrefSize(nsBoxLayoutState& aBoxLayoutState)
{
nsSize pref = nsBoxFrame::GetPrefSize(aBoxLayoutState);
PRInt32 size = GetFixedRowSize();
if (size > -1)
pref.height = size*GetRowHeightAppUnits();
nsIScrollableFrame* scrollFrame = nsLayoutUtils::GetScrollableFrameFor(this);
if (scrollFrame &&
scrollFrame->GetScrollbarStyles().mVertical == NS_STYLE_OVERFLOW_AUTO) {
nsMargin scrollbars = scrollFrame->GetDesiredScrollbarSizes(&aBoxLayoutState);
pref.width += scrollbars.left + scrollbars.right;
}
return pref;
}
void
nsListBoxBodyFrame::CreateRows()
{
// Get our client rect.
nsRect clientRect;
GetClientRect(clientRect);
// Get the starting y position and the remaining available
// height.
nscoord availableHeight = GetAvailableHeight();
if (availableHeight <= 0) {
bool fixed = (GetFixedRowSize() != -1);
if (fixed)
availableHeight = 10;
else
return;
}
// get the first tree box. If there isn't one create one.
bool created = false;
nsIBox* box = GetFirstItemBox(0, &created);
nscoord rowHeight = GetRowHeightAppUnits();
while (box) {
if (created && mRowsToPrepend > 0)
--mRowsToPrepend;
// if the row height is 0 then fail. Wait until someone
// laid out and sets the row height.
if (rowHeight == 0)
return;
availableHeight -= rowHeight;
// should we continue? Is the enought height?
if (!ContinueReflow(availableHeight))
break;
// get the next tree box. Create one if needed.
box = GetNextItemBox(box, 0, &created);
}
mRowsToPrepend = 0;
mLinkupFrame = nsnull;
}
