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6fbabac460
This then becomes the base class for GTableView. I'd like to share as much code as possible with GTextEditor and any other scrollable widgets.
275 lines
10 KiB
C++
275 lines
10 KiB
C++
#include <LibGUI/GTableView.h>
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#include <LibGUI/GTableModel.h>
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#include <LibGUI/GScrollBar.h>
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#include <SharedGraphics/Painter.h>
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#include <Kernel/KeyCode.h>
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GTableView::GTableView(GWidget* parent)
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: GScrollableWidget(parent)
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{
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}
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GTableView::~GTableView()
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{
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}
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void GTableView::set_model(OwnPtr<GTableModel>&& model)
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{
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if (model.ptr() == m_model.ptr())
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return;
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if (m_model)
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m_model->unregister_view(Badge<GTableView>(), *this);
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m_model = move(model);
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if (m_model)
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m_model->register_view(Badge<GTableView>(), *this);
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update_content_size();
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}
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void GTableView::model_notification(const GModelNotification&)
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{
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}
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void GTableView::update_content_size()
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{
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if (!m_model)
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return set_content_size({ });
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int content_width = 0;
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int column_count = m_model->column_count();
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for (int i = 0; i < column_count; ++i)
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content_width += m_model->column_metadata(i).preferred_width + horizontal_padding() * 2;
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int content_height = item_count() * item_height();
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set_content_size({ content_width, content_height });
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set_size_occupied_by_fixed_elements({ 0, header_height() });
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}
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void GTableView::did_update_model()
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{
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update_content_size();
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update();
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model_notification(GModelNotification(GModelNotification::ModelUpdated));
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}
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Rect GTableView::row_rect(int item_index) const
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{
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return { 0, header_height() + (item_index * item_height()), max(content_size().width(), width()), item_height() };
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}
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int GTableView::column_width(int column_index) const
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{
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return m_model->column_metadata(column_index).preferred_width;
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}
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Rect GTableView::header_rect(int column_index) const
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{
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int x_offset = 0;
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for (int i = 0; i < column_index; ++i)
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x_offset += column_width(i) + horizontal_padding() * 2;
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auto column_metadata = m_model->column_metadata(column_index);
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int column_width = column_metadata.preferred_width;
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return { x_offset, 0, column_width + horizontal_padding() * 2, header_height() };
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}
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void GTableView::mousedown_event(GMouseEvent& event)
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{
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if (event.y() < header_height()) {
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auto adjusted_position = event.position().translated(horizontal_scrollbar().value(), 0);
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for (int i = 0; i < m_model->column_count(); ++i) {
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auto header_rect = this->header_rect(i);
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if (header_rect.contains(adjusted_position)) {
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auto new_sort_order = GSortOrder::Ascending;
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if (m_model->key_column() == i)
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new_sort_order = m_model->sort_order() == GSortOrder::Ascending
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? GSortOrder::Descending
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: GSortOrder::Ascending;
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m_model->set_key_column_and_sort_order(i, new_sort_order);
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return;
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}
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}
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return;
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}
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if (event.button() == GMouseButton::Left) {
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auto adjusted_position = event.position().translated(0, vertical_scrollbar().value());
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for (int i = 0; i < item_count(); ++i) {
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if (row_rect(i).contains(adjusted_position)) {
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m_model->set_selected_index({ i, 0 });
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update();
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return;
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}
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}
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m_model->set_selected_index({ });
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update();
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}
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}
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void GTableView::paint_event(GPaintEvent& event)
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{
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Painter painter(*this);
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painter.set_clip_rect(event.rect());
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painter.save();
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painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
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int exposed_width = max(content_size().width(), width());
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int painted_item_index = 0;
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int y_offset = header_height();
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for (int row_index = 0; row_index < m_model->row_count(); ++row_index) {
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int y = y_offset + painted_item_index * item_height();
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Color background_color;
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Color key_column_background_color;
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Color text_color;
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if (row_index == m_model->selected_index().row()) {
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background_color = is_focused() ? Color::from_rgb(0x84351a) : Color::from_rgb(0x606060);
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key_column_background_color = is_focused() ? Color::from_rgb(0x84351a) : Color::from_rgb(0x606060);
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text_color = Color::White;
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} else {
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if (alternating_row_colors() && (painted_item_index % 2)) {
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background_color = Color(210, 210, 210);
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key_column_background_color = Color(190, 190, 190);
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} else {
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background_color = Color::White;
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key_column_background_color = Color(235, 235, 235);
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}
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text_color = Color::Black;
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}
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painter.fill_rect(row_rect(painted_item_index), background_color);
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int x_offset = 0;
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for (int column_index = 0; column_index < m_model->column_count(); ++column_index) {
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auto column_metadata = m_model->column_metadata(column_index);
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int column_width = column_metadata.preferred_width;
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const Font& font = column_metadata.font ? *column_metadata.font : this->font();
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bool is_key_column = m_model->key_column() == column_index;
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Rect cell_rect(horizontal_padding() + x_offset, y, column_width, item_height());
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if (is_key_column) {
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auto cell_rect_for_fill = cell_rect.inflated(horizontal_padding() * 2, 0);
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painter.fill_rect(cell_rect_for_fill, key_column_background_color);
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}
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auto data = m_model->data({ row_index, column_index });
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if (data.is_bitmap())
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painter.blit(cell_rect.location(), data.as_bitmap(), data.as_bitmap().rect());
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else
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painter.draw_text(cell_rect, data.to_string(), font, column_metadata.text_alignment, text_color);
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x_offset += column_width + horizontal_padding() * 2;
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}
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++painted_item_index;
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};
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Rect unpainted_rect(0, header_height() + painted_item_index * item_height(), exposed_width, height());
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painter.fill_rect(unpainted_rect, Color::White);
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// Untranslate the painter vertically and do the column headers.
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painter.translate(0, vertical_scrollbar().value());
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if (headers_visible())
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paint_headers(painter);
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painter.restore();
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if (is_focused()) {
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Rect item_area_rect {
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0,
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header_height(),
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width() - vertical_scrollbar().width(),
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height() - header_height() - horizontal_scrollbar().height()
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};
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painter.draw_rect(item_area_rect, Color::from_rgb(0x84351a));
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};
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}
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void GTableView::paint_headers(Painter& painter)
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{
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int exposed_width = max(content_size().width(), width());
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painter.fill_rect({ 0, 0, exposed_width, header_height() }, Color::LightGray);
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painter.draw_line({ 0, 0 }, { exposed_width - 1, 0 }, Color::White);
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painter.draw_line({ 0, header_height() - 1 }, { exposed_width - 1, header_height() - 1 }, Color::DarkGray);
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int x_offset = 0;
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for (int column_index = 0; column_index < m_model->column_count(); ++column_index) {
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auto column_metadata = m_model->column_metadata(column_index);
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int column_width = column_metadata.preferred_width;
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bool is_key_column = m_model->key_column() == column_index;
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Rect cell_rect(x_offset, 0, column_width + horizontal_padding() * 2, header_height());
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if (is_key_column) {
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painter.fill_rect(cell_rect.shrunken(2, 2), Color::from_rgb(0xdddddd));
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}
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painter.draw_text(cell_rect.translated(horizontal_padding(), 0), m_model->column_name(column_index), Font::default_bold_font(), TextAlignment::CenterLeft, Color::Black);
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x_offset += column_width + horizontal_padding() * 2;
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// Draw column separator.
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painter.draw_line(cell_rect.top_left().translated(0, 1), cell_rect.bottom_left().translated(0, -1), Color::White);
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painter.draw_line(cell_rect.top_right(), cell_rect.bottom_right().translated(0, -1), Color::DarkGray);
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}
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// Draw the "start" of a new column to make the last separator look right.
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painter.draw_line({ x_offset, 1 }, { x_offset, header_height() - 2 }, Color::White);
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}
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int GTableView::item_count() const
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{
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return m_model->row_count();
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}
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void GTableView::keydown_event(GKeyEvent& event)
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{
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if (!model())
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return;
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auto& model = *this->model();
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if (event.key() == KeyCode::Key_Return) {
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model.activate(model.selected_index());
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return;
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}
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if (event.key() == KeyCode::Key_Up) {
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GModelIndex new_index;
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if (model.selected_index().is_valid())
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new_index = { model.selected_index().row() - 1, model.selected_index().column() };
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else
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new_index = { 0, 0 };
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if (model.is_valid(new_index)) {
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model.set_selected_index(new_index);
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scroll_into_view(new_index, Orientation::Vertical);
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update();
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}
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return;
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}
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if (event.key() == KeyCode::Key_Down) {
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GModelIndex new_index;
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if (model.selected_index().is_valid())
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new_index = { model.selected_index().row() + 1, model.selected_index().column() };
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else
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new_index = { 0, 0 };
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if (model.is_valid(new_index)) {
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model.set_selected_index(new_index);
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scroll_into_view(new_index, Orientation::Vertical);
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update();
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}
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return;
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}
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if (event.key() == KeyCode::Key_PageUp) {
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int items_per_page = visible_content_rect().height() / item_height();
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GModelIndex new_index(max(0, model.selected_index().row() - items_per_page), model.selected_index().column());
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if (model.is_valid(new_index)) {
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model.set_selected_index(new_index);
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scroll_into_view(new_index, Orientation::Vertical);
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update();
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}
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return;
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}
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if (event.key() == KeyCode::Key_PageDown) {
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int items_per_page = visible_content_rect().height() / item_height();
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GModelIndex new_index(min(model.row_count() - 1, model.selected_index().row() + items_per_page), model.selected_index().column());
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if (model.is_valid(new_index)) {
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model.set_selected_index(new_index);
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scroll_into_view(new_index, Orientation::Vertical);
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update();
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}
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return;
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}
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return GWidget::keydown_event(event);
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}
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void GTableView::scroll_into_view(const GModelIndex& index, Orientation orientation)
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{
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auto rect = row_rect(index.row()).translated(0, -header_height());
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GScrollableWidget::scroll_into_view(rect, orientation);
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}
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