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GTreeView: Support multiple root-level items

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Previously it was only possible to have a single root-level item in a
GTreeView. This was an oversight and I didn't realize it because this
code was only ever used in the FileManager, which has one root ("/").

Also factored out item toggling into a separate function, and increase
the base indentation level so that root items can be toggled as well.

Finally, let the user toggle the selected item with the spacebar. :^)
This commit is contained in:
Andreas Kling 2019-08-18 10:17:00 +02:00
parent f6cb2fd2fb
commit 5c7bb09a73
Notes: sideshowbarker 2024-07-19 12:37:16 +09:00
2 changed files with 25 additions and 8 deletions
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32
Libraries/LibGUI/GTreeView.cpp
View file

@ -72,12 +72,17 @@ void GTreeView::mousedown_event(GMouseEvent& event)
update();
}
if (is_toggle && model.row_count(index)) {
auto& metadata = ensure_metadata_for_index(index);
metadata.open = !metadata.open;
update_content_size();
update();
}
if (is_toggle && model.row_count(index))
toggle_index(index);
}
void GTreeView::toggle_index(const GModelIndex& index)
{
ASSERT(model()->row_count(index));
auto& metadata = ensure_metadata_for_index(index);
metadata.open = !metadata.open;
update_content_size();
update();
}
template<typename Callback>
@ -85,7 +90,7 @@ void GTreeView::traverse_in_paint_order(Callback callback) const
{
ASSERT(model());
auto& model = *this->model();
int indent_level = 0;
int indent_level = 1;
int y_offset = 0;
Function<IterationDecision(const GModelIndex&)> traverse_index = [&](const GModelIndex& index) {
@ -121,7 +126,11 @@ void GTreeView::traverse_in_paint_order(Callback callback) const
--indent_level;
return IterationDecision::Continue;
};
traverse_index(model.index(0, 0, GModelIndex()));
int root_count = model.row_count();
for (int root_index = 0; root_index < root_count; ++root_index) {
if (traverse_index(model.index(root_index, 0, GModelIndex())) == IterationDecision::Break)
break;
}
}
void GTreeView::paint_event(GPaintEvent& event)
@ -257,6 +266,13 @@ void GTreeView::keydown_event(GKeyEvent& event)
if (!model())
return;
auto cursor_index = model()->selected_index();
if (event.key() == KeyCode::Key_Space) {
if (model()->row_count(cursor_index))
toggle_index(cursor_index);
return;
}
if (event.key() == KeyCode::Key_Up) {
GModelIndex previous_index;
GModelIndex found_index;

1
Libraries/LibGUI/GTreeView.h
View file

@ -27,6 +27,7 @@ private:
int toggle_size() const { return 9; }
int text_padding() const { return 2; }
void update_content_size();
void toggle_index(const GModelIndex&);
template<typename Callback>
void traverse_in_paint_order(Callback) const;