LibGUI: Add (optional) row headers to GUI::TableView

You can now get row headers in your TableView by simply calling:

    table_view.row_header().set_visible(true)

Note that rows are not yet resizable.

Libraries/LibGUI/AbstractTableView.cpp

@@ -42,6 +42,9 @@ AbstractTableView::AbstractTableView()
 {
     m_column_header = add<HeaderView>(*this, Gfx::Orientation::Horizontal);
     m_column_header->move_to_back();
+    m_row_header = add<HeaderView>(*this, Gfx::Orientation::Vertical);
+    m_row_header->move_to_back();
+    m_row_header->set_visible(false);
     set_should_hide_unnecessary_scrollbars(true);
 }
 
@@ -90,6 +93,21 @@ void AbstractTableView::update_column_sizes()
     }
 }
 
+void AbstractTableView::update_row_sizes()
+{
+    if (!model())
+        return;
+
+    auto& model = *this->model();
+    int row_count = model.row_count();
+
+    for (int row = 0; row < row_count; ++row) {
+        if (!column_header().is_section_visible(row))
+            continue;
+        row_header().set_section_size(row, item_height());
+    }
+}
+
 void AbstractTableView::update_content_size()
 {
     if (!model())
@@ -105,8 +123,8 @@ void AbstractTableView::update_content_size()
     int content_height = item_count() * item_height();
 
     set_content_size({ content_width, content_height });
-    column_header().set_width(content_width);
-    set_size_occupied_by_fixed_elements({ 0, m_column_header->height() });
+    set_size_occupied_by_fixed_elements({ row_header().width(), column_header().height() });
+    layout_headers();
 }
 
 TableCellPaintingDelegate* AbstractTableView::column_painting_delegate(int column) const
@@ -278,7 +296,7 @@ Gfx::IntRect AbstractTableView::content_rect(const ModelIndex& index) const
 
 Gfx::IntRect AbstractTableView::row_rect(int item_index) const
 {
-    return { 0, m_column_header->height() + (item_index * item_height()), max(content_size().width(), width()), item_height() };
+    return { row_header().is_visible() ? row_header().width() : 0 , column_header().height() + (item_index * item_height()), max(content_size().width(), width()), item_height() };
 }
 
 Gfx::IntPoint AbstractTableView::adjusted_position(const Gfx::IntPoint& position) const
@@ -289,6 +307,7 @@ Gfx::IntPoint AbstractTableView::adjusted_position(const Gfx::IntPoint& position
 void AbstractTableView::did_update_model(unsigned flags)
 {
     AbstractView::did_update_model(flags);
+    update_row_sizes();
     update_column_sizes();
     update_content_size();
     update();
@@ -297,9 +316,7 @@ void AbstractTableView::did_update_model(unsigned flags)
 void AbstractTableView::resize_event(ResizeEvent& event)
 {
     AbstractView::resize_event(event);
-
-    if (column_header().is_visible())
-        column_header().set_relative_rect(frame_thickness(), frame_thickness(), content_width(), column_header().preferred_size().height());
+    layout_headers();
 }
 
 void AbstractTableView::header_did_change_section_size(Badge<HeaderView>, Gfx::Orientation, int, int)
@@ -327,7 +344,22 @@ void AbstractTableView::set_column_headers_visible(bool visible)
 void AbstractTableView::did_scroll()
 {
     AbstractView::did_scroll();
-    column_header().set_x(frame_thickness() + -horizontal_scrollbar().value());
+    layout_headers();
+}
+
+void AbstractTableView::layout_headers()
+{
+    if (column_header().is_visible()) {
+        int x = frame_thickness() + (row_header().is_visible() ? row_header().width() : 0) + -horizontal_scrollbar().value();
+        int y = frame_thickness();
+        column_header().set_relative_rect(x, y, content_width(), column_header().preferred_size().height());
+    }
+
+    if (row_header().is_visible()) {
+        int x = frame_thickness();
+        int y = (frame_thickness() + (column_header().is_visible() ? column_header().height() : 0)) + -vertical_scrollbar().value();
+        row_header().set_relative_rect(x, y, row_header().preferred_size().width(), content_height());
+    }
 }
 
 }

Libraries/LibGUI/AbstractTableView.h

@@ -82,6 +82,12 @@ public:
 
     virtual void did_scroll() override;
 
+    HeaderView& column_header() { return *m_column_header; }
+    const HeaderView& column_header() const { return *m_column_header; }
+
+    HeaderView& row_header() { return *m_row_header; }
+    const HeaderView& row_header() const { return *m_row_header; }
+
 protected:
     virtual ~AbstractTableView() override;
     AbstractTableView();
@@ -96,15 +102,16 @@ protected:
 
     void update_content_size();
     virtual void update_column_sizes();
+    virtual void update_row_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:
+    void layout_headers();
+
     RefPtr<HeaderView> m_column_header;
+    RefPtr<HeaderView> m_row_header;
 
     HashMap<int, OwnPtr<TableCellPaintingDelegate>> m_column_painting_delegate;
 

Libraries/LibGUI/HeaderView.cpp

@@ -221,11 +221,8 @@ void HeaderView::mouseup_event(MouseEvent& event)
     }
 }
 
-void HeaderView::paint_event(PaintEvent& event)
+void HeaderView::paint_horizontal(Painter& painter)
 {
-    Painter painter(*this);
-    painter.add_clip_rect(event.rect());
-    painter.fill_rect(rect(), palette().button());
     painter.draw_line({ 0, 0 }, { rect().right(), 0 }, palette().threed_highlight());
     painter.draw_line({ 0, rect().bottom() }, { rect().right(), rect().bottom() }, palette().threed_shadow1());
     int x_offset = 0;
@@ -259,6 +256,40 @@ void HeaderView::paint_event(PaintEvent& event)
     }
 }
 
+void HeaderView::paint_vertical(Painter& painter)
+{
+    painter.draw_line(rect().top_left(), rect().bottom_left(), palette().threed_highlight());
+    painter.draw_line(rect().top_right(), rect().bottom_right(), palette().threed_shadow1());
+    int y_offset = 0;
+    int section_count = this->section_count();
+    for (int section = 0; section < section_count; ++section) {
+        if (!is_section_visible(section))
+            continue;
+        int section_size = this->section_size(section);
+        Gfx::IntRect cell_rect(0, y_offset, width(), section_size);
+        bool pressed = section == m_pressed_section && m_pressed_section_is_pressed;
+        bool hovered = false;
+        Gfx::StylePainter::paint_button(painter, cell_rect, palette(), Gfx::ButtonStyle::Normal, pressed, hovered);
+        String text = String::format("%d", section);
+        auto text_rect = cell_rect.shrunken(horizontal_padding() * 2, 0);
+        if (pressed)
+            text_rect.move_by(1, 1);
+        painter.draw_text(text_rect, text, font(), section_alignment(section), palette().button_text());
+        y_offset += section_size;
+    }
+}
+
+void HeaderView::paint_event(PaintEvent& event)
+{
+    Painter painter(*this);
+    painter.add_clip_rect(event.rect());
+    painter.fill_rect(rect(), palette().button());
+    if (orientation() == Gfx::Orientation::Horizontal)
+        paint_horizontal(painter);
+    else
+        paint_vertical(painter);
+}
+
 void HeaderView::set_section_visible(int section, bool visible)
 {
     auto& data = section_data(section);

Libraries/LibGUI/HeaderView.h

@@ -68,6 +68,9 @@ private:
 
     Gfx::IntRect section_resize_grabbable_rect(int) const;
 
+    void paint_horizontal(Painter&);
+    void paint_vertical(Painter&);
+
     Menu& ensure_context_menu();
     RefPtr<Menu> m_context_menu;
 

Libraries/LibGUI/TableView.cpp

@@ -66,7 +66,8 @@ void TableView::paint_event(PaintEvent& event)
         return;
 
     int exposed_width = max(content_size().width(), width());
-    int y_offset = column_header().height();
+    int x_offset = row_header().is_visible() ? row_header().width() : 0;
+    int y_offset = column_header().is_visible() ? column_header().height() : 0;
 
     bool dummy;
     int first_visible_row = index_at_event_position(frame_inner_rect().top_left(), dummy).row();
@@ -99,13 +100,13 @@ void TableView::paint_event(PaintEvent& event)
         }
         painter.fill_rect(row_rect(painted_item_index), background_color);
 
-        int x_offset = 0;
+        int x = x_offset;
         for (int column_index = 0; column_index < model()->column_count(); ++column_index) {
             if (!column_header().is_section_visible(column_index))
                 continue;
             int column_width = this->column_width(column_index);
             bool is_key_column = m_key_column == column_index;
-            Gfx::IntRect cell_rect(horizontal_padding() + x_offset, y, column_width, item_height());
+            Gfx::IntRect cell_rect(horizontal_padding() + x, y, column_width, item_height());
             auto cell_rect_for_fill = cell_rect.inflated(horizontal_padding() * 2, 0);
             if (is_key_column)
                 painter.fill_rect(cell_rect_for_fill, key_column_background_color);
@@ -139,7 +140,7 @@ void TableView::paint_event(PaintEvent& event)
                     painter.draw_text(cell_rect, data.to_string(), font_for_index(cell_index), text_alignment, text_color, Gfx::TextElision::Right);
                 }
             }
-            x_offset += column_width + horizontal_padding() * 2;
+            x += column_width + horizontal_padding() * 2;
         }
         ++painted_item_index;
     };