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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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14
Libraries/LibGUI/GTreeView.h
View file

@ -1,19 +1,20 @@
#pragma once
#include <LibGUI/GAbstractView.h>
#include <LibGUI/GAbstractColumnView.h>
class GTreeView : public GAbstractView {
class GTreeView : public GAbstractColumnView {
C_OBJECT(GTreeView)
public:
virtual ~GTreeView() override;
virtual void scroll_into_view(const GModelIndex&, Orientation);
virtual int item_count() const override;
protected:
explicit GTreeView(GWidget*);
virtual void paint_event(GPaintEvent&) override;
virtual void mousedown_event(GMouseEvent&) override;
virtual void doubleclick_event(GMouseEvent&) override;
virtual void keydown_event(GKeyEvent&) override;
virtual void did_update_selection() override;
@ -21,7 +22,8 @@ protected:
virtual void context_menu_event(GContextMenuEvent&) override;
private:
GModelIndex index_at_content_position(const Point&, bool& is_toggle) const;
virtual GModelIndex index_at_event_position(const Point&, bool& is_toggle) const override;
int item_height() const { return 16; }
int max_item_width() const { return frame_inner_rect().width(); }
int indent_width_in_pixels() const { return 16; }
@ -29,8 +31,8 @@ private:
int icon_spacing() const { return 2; }
int toggle_size() const { return 9; }
int text_padding() const { return 2; }
void update_content_size();
void toggle_index(const GModelIndex&);
virtual void toggle_index(const GModelIndex&) override;
virtual void update_column_sizes() override;
template<typename Callback>
void traverse_in_paint_order(Callback) const;