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LibGUI: Make GTreeView inherit from GAbstractColumnView

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This makes GTreeView able to support multi-column models!

Only one column can be the "tree column", this is column 0 by default
but can be changed by overriding GModel::tree_column().
This commit is contained in:
Andreas Kling 2019-12-13 23:36:36 +01:00
parent b909d991f1
commit 0ac74d3778
7 changed files with 248 additions and 121 deletions
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15
Libraries/LibGUI/GAbstractColumnView.cpp
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@ -96,6 +96,8 @@ void GAbstractColumnView::set_hovered_header_index(int index)
void GAbstractColumnView::paint_headers(GPainter& painter)
{
if (!headers_visible())
return;
int exposed_width = max(content_size().width(), width());
painter.fill_rect({ 0, 0, exposed_width, header_height() }, Color::WarmGray);
painter.draw_line({ 0, 0 }, { exposed_width - 1, 0 }, Color::White);
@ -327,18 +329,24 @@ void GAbstractColumnView::mousedown_event(GMouseEvent& event)
return;
}
auto index = index_at_event_position(event.position());
bool is_toggle;
auto index = index_at_event_position(event.position(), is_toggle);
if (!index.is_valid()) {
selection().clear();
return;
}
if (is_toggle && model()->row_count(index)) {
toggle_index(index);
return;
}
if (event.modifiers() & Mod_Ctrl)
selection().toggle(index);
else
selection().set(index);
}
GModelIndex GAbstractColumnView::index_at_event_position(const Point& position) const
GModelIndex GAbstractColumnView::index_at_event_position(const Point& position, bool&) const
{
if (!model())
return {};
@ -464,7 +472,8 @@ void GAbstractColumnView::context_menu_event(GContextMenuEvent& event)
return;
}
auto index = index_at_event_position(event.position());
bool is_toggle;
auto index = index_at_event_position(event.position(), is_toggle);
if (index.is_valid()) {
if (!selection().contains(index))
selection().set(index);