9cf37901cd
Views now have a cursor index (retrievable via cursor_index()) which is separate from the selection. Until now, we've been using the first entry in the selection as "the cursor", which gets messy whenever you want to select more than one index in the model. When setting the cursor, the selection is implicitly updated as well to maintain the old behavior (for the most part.) Going forward, this will make it much easier to implement things like shift-select (extend selection from cursor) and such. :^)
87 lines
3.2 KiB
C++
87 lines
3.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/HashMap.h>
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#include <LibGUI/AbstractTableView.h>
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namespace GUI {
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class TreeView : public AbstractTableView {
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C_OBJECT(TreeView)
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public:
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virtual ~TreeView() override;
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virtual void scroll_into_view(const ModelIndex&, Gfx::Orientation);
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virtual int item_count() const override;
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virtual void toggle_index(const ModelIndex&) override;
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void expand_tree(const ModelIndex& root = {});
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void collapse_tree(const ModelIndex& root = {});
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Function<void(const ModelIndex&, const bool)> on_toggle;
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protected:
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TreeView();
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virtual void paint_event(PaintEvent&) override;
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virtual void doubleclick_event(MouseEvent&) override;
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virtual void keydown_event(KeyEvent&) override;
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virtual void did_update_selection() override;
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virtual void did_update_model(unsigned flags) override;
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virtual void move_cursor(CursorMovement, SelectionUpdate) override;
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private:
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virtual ModelIndex index_at_event_position(const Gfx::IntPoint&, bool& is_toggle) const override;
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int row_height() const { return 16; }
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int max_item_width() const { return frame_inner_rect().width(); }
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int indent_width_in_pixels() const { return 16; }
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int icon_size() const { return 16; }
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int icon_spacing() const { return 2; }
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int toggle_size() const { return 9; }
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int text_padding() const { return 2; }
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int tree_column_x_offset() const;
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virtual void update_column_sizes() override;
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template<typename Callback>
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void traverse_in_paint_order(Callback) const;
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struct MetadataForIndex;
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MetadataForIndex& ensure_metadata_for_index(const ModelIndex&) const;
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void set_open_state_of_all_in_subtree(const ModelIndex& root, bool open);
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mutable HashMap<void*, NonnullOwnPtr<MetadataForIndex>> m_view_metadata;
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RefPtr<Gfx::Bitmap> m_expand_bitmap;
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RefPtr<Gfx::Bitmap> m_collapse_bitmap;
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};
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}
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