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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/HashMap.h>
#include <LibGUI/AbstractTableView.h>
namespace GUI {
class TreeView : public AbstractTableView {
C_OBJECT(TreeView)
public:
virtual ~TreeView() override;
virtual void scroll_into_view(const ModelIndex&, bool scroll_horizontally, bool scroll_vertically) override;
virtual int item_count() const override;
virtual void toggle_index(const ModelIndex&) override;
void expand_tree(const ModelIndex& root = {});
void collapse_tree(const ModelIndex& root = {});
void expand_all_parents_of(const ModelIndex&);
Function<void(const ModelIndex&, const bool)> on_toggle;
void set_should_fill_selected_rows(bool fill) { m_should_fill_selected_rows = fill; }
bool should_fill_selected_rows() const { return m_should_fill_selected_rows; }
virtual int vertical_padding() const override { return m_vertical_padding; }
protected:
TreeView();
virtual void paint_event(PaintEvent&) override;
virtual void doubleclick_event(MouseEvent&) override;
virtual void keydown_event(KeyEvent&) override;
virtual void did_update_selection() override;
virtual void model_did_update(unsigned flags) override;
virtual void move_cursor(CursorMovement, SelectionUpdate) override;
private:
virtual ModelIndex index_at_event_position(const Gfx::IntPoint&, bool& is_toggle) const override;
int row_height() const { return 16; }
int max_item_width() const { return frame_inner_rect().width(); }
int indent_width_in_pixels() const { return 16; }
int icon_size() const { return 16; }
int icon_spacing() const { return 2; }
int toggle_size() const { return 9; }
int text_padding() const { return 2; }
int tree_column_x_offset() const;
virtual void update_column_sizes() override;
virtual void auto_resize_column(int column) override;
template<typename Callback>
void traverse_in_paint_order(Callback) const;
struct MetadataForIndex;
MetadataForIndex& ensure_metadata_for_index(const ModelIndex&) const;
void set_open_state_of_all_in_subtree(const ModelIndex& root, bool open);
mutable HashMap<void*, NonnullOwnPtr<MetadataForIndex>> m_view_metadata;
RefPtr<Gfx::Bitmap> m_expand_bitmap;
RefPtr<Gfx::Bitmap> m_collapse_bitmap;
bool m_should_fill_selected_rows { false };
int m_vertical_padding { 6 };
};
}
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