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https://github.com/LadybirdBrowser/ladybird.git
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279 lines
11 KiB
C++
279 lines
11 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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: GWidget(parent)
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{
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set_fill_with_background_color(false);
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m_vertical_scrollbar = new GScrollBar(Orientation::Vertical, this);
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m_vertical_scrollbar->set_step(4);
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m_vertical_scrollbar->on_change = [this] (int) {
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update();
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};
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m_horizontal_scrollbar = new GScrollBar(Orientation::Horizontal, this);
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m_horizontal_scrollbar->set_step(4);
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m_horizontal_scrollbar->set_big_step(30);
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m_horizontal_scrollbar->on_change = [this] (int) {
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update();
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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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}
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void GTableView::resize_event(GResizeEvent& event)
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{
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update_scrollbar_ranges();
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m_vertical_scrollbar->set_relative_rect(event.size().width() - m_vertical_scrollbar->preferred_size().width(), 0, m_vertical_scrollbar->preferred_size().width(), event.size().height() - m_horizontal_scrollbar->preferred_size().height());
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m_horizontal_scrollbar->set_relative_rect(0, event.size().height() - m_horizontal_scrollbar->preferred_size().height(), event.size().width() - m_vertical_scrollbar->preferred_size().width(), m_horizontal_scrollbar->preferred_size().height());
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}
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void GTableView::update_scrollbar_ranges()
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{
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int available_height = height() - header_height() - m_horizontal_scrollbar->height();
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int excess_height = max(0, (item_count() * item_height()) - available_height);
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m_vertical_scrollbar->set_range(0, excess_height);
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int available_width = width() - m_vertical_scrollbar->width();
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int excess_width = max(0, content_width() - available_width);
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m_horizontal_scrollbar->set_range(0, excess_width);
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m_vertical_scrollbar->set_big_step(visible_content_rect().height() - item_height());
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}
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int GTableView::content_width() const
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{
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if (!m_model)
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return 0;
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int 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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width += m_model->column_metadata(i).preferred_width + horizontal_padding() * 2;
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return width;
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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::did_update_model()
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{
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update_scrollbar_ranges();
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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_width(), width()), item_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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// FIXME: Do something when clicking on a header.
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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, m_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.translate(-m_horizontal_scrollbar->value(), -m_vertical_scrollbar->value());
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int exposed_width = max(content_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 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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text_color = Color::White;
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} else {
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background_color = painted_item_index % 2 ? Color(210, 210, 210) : Color::White;
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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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Rect cell_rect(horizontal_padding() + x_offset, y, column_width, item_height());
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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(), 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 and paint the column headers.
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painter.translate(0, m_vertical_scrollbar->value());
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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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Rect cell_rect(x_offset, 0, column_width + horizontal_padding() * 2, header_height());
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painter.set_font(Font::default_bold_font());
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painter.draw_text(cell_rect.translated(horizontal_padding(), 0), m_model->column_name(column_index), 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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// Then untranslate and fill in the scroll corner. This is pretty messy, tbh.
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painter.translate(m_horizontal_scrollbar->value(), 0);
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painter.fill_rect({ m_horizontal_scrollbar->relative_rect().top_right().translated(1, 0), { m_vertical_scrollbar->preferred_size().width(), m_horizontal_scrollbar->preferred_size().height() } }, Color::LightGray);
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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() - m_vertical_scrollbar->width(),
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height() - header_height() - m_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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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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Rect GTableView::visible_content_rect() const
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{
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return {
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m_horizontal_scrollbar->value(),
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m_vertical_scrollbar->value(),
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width() - m_vertical_scrollbar->width(),
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height() - header_height() - m_horizontal_scrollbar->height()
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};
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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 visible_content_rect = this->visible_content_rect();
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auto rect = row_rect(index.row()).translated(0, -header_height());
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if (visible_content_rect.contains(rect))
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return;
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if (orientation == Orientation::Vertical) {
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if (rect.top() < visible_content_rect.top())
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m_vertical_scrollbar->set_value(rect.top());
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else if (rect.bottom() > visible_content_rect.bottom())
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m_vertical_scrollbar->set_value(rect.bottom() - visible_content_rect.height());
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} else {
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if (rect.left() < visible_content_rect.left())
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m_horizontal_scrollbar->set_value(rect.left());
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else if (rect.right() > visible_content_rect.right())
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m_horizontal_scrollbar->set_value(rect.right() - visible_content_rect.width());
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}
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}
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