Aren/haiku
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* use BListItem::Height() consistently (clicking a nick in Vision now selects

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that same nick, not a different one)
* performance improvement in Draw() (using ItemFrame() in the inner loop scales
  really bad)
* fixed scroll range for when BListItem::Height() is non-integer (scrolling
  all the way to the bottom in Visions nick list works now)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22835 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus 2007-11-05 15:29:25 +00:00
parent 5ff3d4f2db
commit d4983ec0c8
1 changed files with 18 additions and 13 deletions
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31
src/kits/interface/ListView.cpp
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@ -187,11 +187,19 @@ BListView::Archive(BMessage *archive, bool deep) const
void
BListView::Draw(BRect updateRect)
{
for (int i = 0; i < CountItems(); i++) {
BRect itemFrame = ItemFrame(i);
int32 count = CountItems();
if (count == 0)
return;
BRect itemFrame(Bounds().left, 0, Bounds().right, -1);
for (int i = 0; i < count; i++) {
BListItem* item = ItemAt(i);
itemFrame.bottom = itemFrame.top + ceilf(item->Height()) - 1;
if (itemFrame.Intersects(updateRect))
DrawItem(((BListItem*)ItemAt(i)), itemFrame);
DrawItem(item, itemFrame);
itemFrame.top = itemFrame.bottom + 1;
}
}
@ -696,7 +704,7 @@ BListView::IndexOf(BPoint point) const
// TODO: somehow binary search, but items don't know their frame
for (int i = 0; i < fList.CountItems(); i++) {
y += ItemAt(i)->Height();
y += ceilf(ItemAt(i)->Height());
if (point.y < y)
return i;
@ -1010,7 +1018,7 @@ BListView::FrameMoved(BPoint new_position)
BRect
BListView::ItemFrame(int32 index)
{
BRect frame(0, 0, Bounds().Width(), -1);
BRect frame(Bounds().left, 0, Bounds().right, -1);
if (index < 0 || index >= CountItems())
return frame;
@ -1018,7 +1026,7 @@ BListView::ItemFrame(int32 index)
// TODO: this is very expensive, the (last) offsets could be cached
for (int32 i = 0; i <= index; i++) {
frame.top = frame.bottom + 1;
frame.bottom += (float)ceil(ItemAt(i)->Height());
frame.bottom = frame.top + ceilf(ItemAt(i)->Height()) - 1;
}
return frame;
@ -1200,9 +1208,8 @@ BListView::_FixupScrollBar()
int32 count = CountItems();
float itemHeight = 0;
for (int32 i = 0; BListItem* item = ItemAt(i); i++) {
itemHeight += item->Height();
}
for (int32 i = 0; i < count; i++)
itemHeight += ceilf(ItemAt(i)->Height());
if (bounds.Height() > itemHeight) {
// no scrolling
@ -1218,10 +1225,8 @@ BListView::_FixupScrollBar()
}
}
if (count != 0) {
vertScroller->SetSteps((float)ceil(FirstItem()->Height()),
bounds.Height());
}
if (count != 0)
vertScroller->SetSteps(ceilf(FirstItem()->Height()), bounds.Height());
}
// _InvalidateFrom