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LibGUI: Move table view headers into their own widget

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This patch introduces the HeaderView class, which is a widget that
implements the column headers of TableView and TreeView.

This greatly simplifies event management in the view implementations
and also makes it much easier to eventually implement row headers.
This commit is contained in:
Andreas Kling 2020-08-25 11:25:39 +02:00
parent eca6ff353e
commit 44e371635e
16 changed files with 555 additions and 351 deletions
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60
Libraries/LibGUI/AbstractTableView.h
View file

@ -46,12 +46,9 @@ public:
bool highlight_selected_rows() const { return m_highlight_selected_rows; }
void set_highlight_selected_rows(bool b) { m_highlight_selected_rows = b; }
int header_height() const { return m_headers_visible ? 16 : 0; }
bool column_headers_visible() const;
void set_column_headers_visible(bool);
bool headers_visible() const { return m_headers_visible; }
void set_headers_visible(bool headers_visible) { m_headers_visible = headers_visible; }
bool is_column_hidden(int) const;
void set_column_hidden(int, bool);
int column_width(int column) const;
@ -60,7 +57,7 @@ public:
Gfx::TextAlignment column_header_alignment(int column) const;
void set_column_header_alignment(int column, Gfx::TextAlignment);
void set_cell_painting_delegate(int column, OwnPtr<TableCellPaintingDelegate>&&);
void set_cell_painting_delegate(int column, OwnPtr<TableCellPaintingDelegate>);
int horizontal_padding() const { return m_horizontal_padding; }
@ -80,59 +77,40 @@ public:
void move_selection(int vertical_steps, int horizontal_steps);
void header_did_change_section_visibility(Badge<HeaderView>, Gfx::Orientation, int section, bool visible);
void header_did_change_section_size(Badge<HeaderView>, Gfx::Orientation, int section, int size);
virtual void did_scroll() override;
protected:
virtual ~AbstractTableView() override;
AbstractTableView();
virtual void did_update_model(unsigned flags) override;
virtual void mouseup_event(MouseEvent&) override;
virtual void mousedown_event(MouseEvent&) override;
virtual void mousemove_event(MouseEvent&) override;
virtual void doubleclick_event(MouseEvent&) override;
virtual void leave_event(Core::Event&) override;
virtual void context_menu_event(ContextMenuEvent&) override;
virtual void resize_event(ResizeEvent&) override;
virtual void did_update_model(unsigned flags) override;
virtual void toggle_index(const ModelIndex&) { }
void paint_headers(Painter&);
Gfx::IntRect header_rect(int column) const;
static const Gfx::Font& header_font();
void update_headers();
void set_hovered_header_index(int);
struct ColumnData {
int width { 0 };
bool has_initialized_width { false };
bool visibility { true };
RefPtr<Action> visibility_action;
Gfx::TextAlignment header_alignment { Gfx::TextAlignment::CenterLeft };
OwnPtr<TableCellPaintingDelegate> cell_painting_delegate;
};
ColumnData& column_data(int column) const;
mutable Vector<ColumnData> m_column_data;
Menu& ensure_header_context_menu();
RefPtr<Menu> m_header_context_menu;
Gfx::IntRect column_resize_grabbable_rect(int) const;
void update_content_size();
virtual void update_column_sizes();
virtual int item_count() const;
TableCellPaintingDelegate* column_painting_delegate(int column) const;
HeaderView& column_header() { return *m_column_header; }
const HeaderView& column_header() const { return *m_column_header; }
private:
bool m_headers_visible { true };
bool m_in_column_resize { false };
RefPtr<HeaderView> m_column_header;
HashMap<int, OwnPtr<TableCellPaintingDelegate>> m_column_painting_delegate;
bool m_alternating_row_colors { true };
bool m_highlight_selected_rows { true };
int m_horizontal_padding { 5 };
Gfx::IntPoint m_column_resize_origin;
int m_column_resize_original_width { 0 };
int m_resizing_column { -1 };
int m_pressed_column_header_index { -1 };
bool m_pressed_column_header_is_pressed { false };
int m_hovered_column_header_index { -1 };
};
}