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GTreeView: Support navigating the tree with the up/down keys.

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This commit is contained in:
Andreas Kling 2019-04-02 03:18:26 +02:00
parent 6673284b06
commit b797458962
2 changed files with 41 additions and 0 deletions
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40
LibGUI/GTreeView.cpp
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@ -242,6 +242,7 @@ void GTreeView::did_update_selection()
}
if (opened_any)
update_content_size();
update();
}
void GTreeView::update_content_size()
@ -255,3 +256,42 @@ void GTreeView::update_content_size()
});
set_content_size({ width, height });
}
void GTreeView::keydown_event(GKeyEvent& event)
{
if (!model())
return;
auto cursor_index = model()->selected_index();
if (event.key() == KeyCode::Key_Up) {
GModelIndex previous_index;
GModelIndex found_index;
traverse_in_paint_order([&] (const GModelIndex& index, const Rect&, const Rect&, int) {
if (index == cursor_index) {
found_index = previous_index;
return IterationDecision::Abort;
}
previous_index = index;
return IterationDecision::Continue;
});
if (found_index.is_valid()) {
model()->set_selected_index(found_index);
update();
}
return;
}
if (event.key() == KeyCode::Key_Down) {
GModelIndex previous_index;
GModelIndex found_index;
traverse_in_paint_order([&] (const GModelIndex& index, const Rect&, const Rect&, int) {
if (previous_index == cursor_index) {
found_index = index;
return IterationDecision::Abort;
}
previous_index = index;
return IterationDecision::Continue;
});
if (found_index.is_valid())
model()->set_selected_index(found_index);
return;
}
}