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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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; }
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 did_update_model(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;
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 };
};
}
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