void DropDownList::GetBatches(ea::vector<UIBatch>& batches, ea::vector<float>& vertexData, const IntRect& currentScissor)
{
Menu::GetBatches(batches, vertexData, currentScissor);
if (!placeholder_->IsVisible())
return;
UIElement* selectedItem = GetSelectedItem();
if (selectedItem)
{
// Can not easily copy the selected item. However, it can be re-rendered on the placeholder's position
const IntVector2& targetPos = placeholder_->GetScreenPosition();
const IntVector2& originalPos = selectedItem->GetScreenPosition();
IntVector2 offset = targetPos - originalPos;
// GetBatches() usually resets the hover flag. Therefore get its value and then reset it for the real rendering
// Render the selected item without its selection color, so temporarily reset the item's selected attribute
bool hover = selectedItem->IsHovering();
selectedItem->SetSelected(false);
selectedItem->SetHovering(false);
selectedItem->GetBatchesWithOffset(offset, batches, vertexData, currentScissor);
selectedItem->SetSelected(true);
selectedItem->SetHovering(hover);
}
}
void ListView::UpdateSelectionEffect()
{
unsigned numItems = GetNumItems();
bool highlighted = highlightMode_ == HM_ALWAYS || HasFocus();
for (unsigned i = 0; i < numItems; ++i)
{
UIElement* item = GetItem(i);
if (highlightMode_ != HM_NEVER && selections_.Contains(i))
item->SetSelected(highlighted);
else
item->SetSelected(false);
}
}
void ListView::RemoveItem(UIElement* item, unsigned index)
{
if (!item)
return;
unsigned numItems = GetNumItems();
for (unsigned i = index; i < numItems; ++i)
{
if (GetItem(i) == item)
{
item->SetSelected(false);
selections_.Remove(i);
unsigned removed = 1;
if (hierarchyMode_)
{
// Remove any child items in hierarchy mode
if (GetItemHierarchyParent(item))
{
int baseIndent = item->GetIndent();
for (unsigned j = i + 1; ; ++j)
{
UIElement* childItem = GetItem(i + 1);
if (!childItem)
break;
if (childItem->GetIndent() > baseIndent)
{
childItem->SetSelected(false);
selections_.Erase(j);
contentElement_->RemoveChildAtIndex(i + 1);
overlayContainer_->RemoveChildAtIndex(i + 1);
++removed;
}
else
break;
}
}
// Check if the parent of removed item still has other children
if (i > 0)
{
int baseIndent = item->GetIndent();
UIElement* prevKin = GetItem(i - 1); // Could be parent or sibling
if (prevKin->GetIndent() < baseIndent)
{
UIElement* nextKin = GetItem(i + 1); // Could be sibling or parent-sibling or 0 if index out of bound
if (!nextKin || nextKin->GetIndent() < baseIndent)
{
// If we reach here then the parent has no other children
SetItemHierarchyParent(prevKin, false);
}
}
}
// Remove the overlay at the same index
overlayContainer_->RemoveChildAtIndex(i);
}
// If necessary, shift the following selections
if (!selections_.Empty())
{
for (unsigned j = 0; j < selections_.Size(); ++j)
{
if (selections_[j] > i)
selections_[j] -= removed;
}
UpdateSelectionEffect();
}
contentElement_->RemoveChildAtIndex(i);
break;
}
}
}