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GTableView: Add a way to customize cell painting per-column

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You can now set a GTableCellPaintingDelegate per column in GTableView.
For columns with a painting delegate set, the view will defer to the
delegate for painting each cell in that column.
This commit is contained in:
Andreas Kling 2019-08-14 20:34:46 +02:00
parent b777f740a4
commit 9789ee9b58
Notes: sideshowbarker 2024-07-19 12:40:53 +09:00
2 changed files with 34 additions and 13 deletions
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36
Libraries/LibGUI/GTableView.cpp
View file

@ -158,7 +158,7 @@ void GTableView::mousedown_event(GMouseEvent& event)
return;
}
auto header_rect = this->header_rect(i);
auto column_metadata = model()->column_metadata(i);
auto column_metadata = model()->column_metadata(i);
if (header_rect.contains(event.position()) && column_metadata.sortable == GModel::ColumnMetadata::Sortable::True) {
auto new_sort_order = GSortOrder::Ascending;
if (model()->key_column() == i)
@ -288,19 +288,24 @@ void GTableView::paint_event(GPaintEvent& event)
painter.fill_rect(cell_rect_for_fill, key_column_background_color);
}
auto cell_index = model()->index(row_index, column_index);
auto data = model()->data(cell_index);
if (data.is_bitmap()) {
painter.blit(cell_rect.location(), data.as_bitmap(), data.as_bitmap().rect());
} else if (data.is_icon()) {
if (auto bitmap = data.as_icon().bitmap_for_size(16))
painter.blit(cell_rect.location(), *bitmap, bitmap->rect());
if (auto* delegate = column_data(column_index).cell_painting_delegate.ptr()) {
delegate->paint(painter, cell_rect, *model(), cell_index);
} else {
Color text_color;
if (is_selected_row)
text_color = Color::White;
else
text_color = model()->data(cell_index, GModel::Role::ForegroundColor).to_color(Color::Black);
painter.draw_text(cell_rect, data.to_string(), font, column_metadata.text_alignment, text_color, TextElision::Right);
auto data = model()->data(cell_index);
if (data.is_bitmap()) {
painter.blit(cell_rect.location(), data.as_bitmap(), data.as_bitmap().rect());
} else if (data.is_icon()) {
if (auto bitmap = data.as_icon().bitmap_for_size(16))
painter.blit(cell_rect.location(), *bitmap, bitmap->rect());
} else {
Color text_color;
if (is_selected_row)
text_color = Color::White;
else
text_color = model()->data(cell_index, GModel::Role::ForegroundColor).to_color(Color::Black);
painter.draw_text(cell_rect, data.to_string(), font, column_metadata.text_alignment, text_color, TextElision::Right);
}
}
x_offset += column_width + horizontal_padding() * 2;
}
@ -512,3 +517,8 @@ const Font& GTableView::header_font()
{
return Font::default_bold_font();
}
void GTableView::set_cell_painting_delegate(int column, OwnPtr<GTableCellPaintingDelegate>&& delegate)
{
column_data(column).cell_painting_delegate = move(delegate);
}

11
Libraries/LibGUI/GTableView.h
View file

@ -5,9 +5,17 @@
#include <LibGUI/GAbstractView.h>
#include <LibGUI/GModel.h>
class GPainter;
class GScrollBar;
class Painter;
class GTableCellPaintingDelegate {
public:
virtual ~GTableCellPaintingDelegate() {}
virtual void paint(GPainter&, const Rect&, const GModel&, const GModelIndex&) = 0;
};
class GTableView : public GAbstractView {
C_OBJECT(GTableView)
public:
@ -38,6 +46,8 @@ public:
virtual Rect content_rect(const GModelIndex&) const override;
void set_cell_painting_delegate(int column, OwnPtr<GTableCellPaintingDelegate>&&);
private:
virtual void did_update_model() override;
virtual void paint_event(GPaintEvent&) override;
@ -67,6 +77,7 @@ private:
bool has_initialized_width { false };
bool visibility { true };
RefPtr<GAction> visibility_action;
OwnPtr<GTableCellPaintingDelegate> cell_painting_delegate;
};
ColumnData& column_data(int column) const;