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LibGUI: Add is_toggled getter for TreeView

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This has safer fallbacks than toggle_index, because we want to be able
to call it on indices that don't have children.
This commit is contained in:
kleines Filmröllchen 2022-04-05 00:19:52 +02:00 • committed by Andreas Kling
parent d813bf77ee
commit 4e8cb0508f
2 changed files with 13 additions and 0 deletions
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12
Userland/Libraries/LibGUI/TreeView.cpp
View file

@ -158,6 +158,18 @@ void TreeView::toggle_index(ModelIndex const& index)
update();
}
bool TreeView::is_toggled(ModelIndex const& index)
{
if (model()->row_count(index) == 0) {
if (model()->parent_index(index).is_valid())
return is_toggled(model()->parent_index(index));
return false;
}
auto& metadata = ensure_metadata_for_index(index);
return metadata.open;
}
template<typename Callback>
void TreeView::traverse_in_paint_order(Callback callback) const
{

1
Userland/Libraries/LibGUI/TreeView.h
View file

@ -21,6 +21,7 @@ public:
virtual int item_count() const override;
virtual void toggle_index(ModelIndex const&) override;
bool is_toggled(ModelIndex const& index);
void expand_tree(ModelIndex const& root = {});
void collapse_tree(ModelIndex const& root = {});