TreeView.h 2.9 KB

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  1. /*
  2. * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
  3. * All rights reserved.
  4. *
  5. * Redistribution and use in source and binary forms, with or without
  6. * modification, are permitted provided that the following conditions are met:
  7. *
  8. * 1. Redistributions of source code must retain the above copyright notice, this
  9. * list of conditions and the following disclaimer.
  10. *
  11. * 2. Redistributions in binary form must reproduce the above copyright notice,
  12. * this list of conditions and the following disclaimer in the documentation
  13. * and/or other materials provided with the distribution.
  14. *
  15. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  16. * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18. * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  19. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21. * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  22. * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  23. * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25. */
  26. #pragma once
  27. #include <AK/HashMap.h>
  28. #include <LibGUI/AbstractTableView.h>
  29. namespace GUI {
  30. class TreeView : public AbstractTableView {
  31. C_OBJECT(TreeView)
  32. public:
  33. virtual ~TreeView() override;
  34. virtual void scroll_into_view(const ModelIndex&, Gfx::Orientation);
  35. virtual int item_count() const override;
  36. virtual void toggle_index(const ModelIndex&) override;
  37. protected:
  38. TreeView();
  39. virtual void paint_event(PaintEvent&) override;
  40. virtual void doubleclick_event(MouseEvent&) override;
  41. virtual void keydown_event(KeyEvent&) override;
  42. virtual void did_update_selection() override;
  43. virtual void did_update_model() override;
  44. private:
  45. virtual ModelIndex index_at_event_position(const Gfx::Point&, bool& is_toggle) const override;
  46. int item_height() const { return 16; }
  47. int max_item_width() const { return frame_inner_rect().width(); }
  48. int indent_width_in_pixels() const { return 16; }
  49. int icon_size() const { return 16; }
  50. int icon_spacing() const { return 2; }
  51. int toggle_size() const { return 9; }
  52. int text_padding() const { return 2; }
  53. int tree_column_x_offset() const;
  54. virtual void update_column_sizes() override;
  55. template<typename Callback>
  56. void traverse_in_paint_order(Callback) const;
  57. struct MetadataForIndex;
  58. MetadataForIndex& ensure_metadata_for_index(const ModelIndex&) const;
  59. mutable HashMap<void*, NonnullOwnPtr<MetadataForIndex>> m_view_metadata;
  60. RefPtr<Gfx::Bitmap> m_expand_bitmap;
  61. RefPtr<Gfx::Bitmap> m_collapse_bitmap;
  62. };
  63. }