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https://github.com/LadybirdBrowser/ladybird.git
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8e4751a963
This is really just a workaround to keep SystemMonitor's process table working right wrt selection retention during resorts (while also doing full index invalidation on things like ProfileViewer inversion.) It's starting to feel like the model abstraction is not super great and we'll need a better approach if we want to actually build some more dynamic functionality into our views.
267 lines
8.9 KiB
C++
267 lines
8.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Kernel/KeyCode.h>
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#include <LibGUI/ListView.h>
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#include <LibGUI/Model.h>
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#include <LibGUI/Painter.h>
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#include <LibGUI/ScrollBar.h>
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#include <LibGfx/Palette.h>
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namespace GUI {
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ListView::ListView()
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{
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set_background_role(ColorRole::Base);
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set_foreground_role(ColorRole::BaseText);
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}
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ListView::~ListView()
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{
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}
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void ListView::select_all()
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{
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selection().clear();
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for (int item_index = 0; item_index < item_count(); ++item_index) {
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auto index = model()->index(item_index, m_model_column);
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selection().add(index);
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}
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}
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void ListView::update_content_size()
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{
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if (!model())
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return set_content_size({});
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int content_width = 0;
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for (int row = 0, row_count = model()->row_count(); row < row_count; ++row) {
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auto text = model()->data(model()->index(row, m_model_column), Model::Role::Display);
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content_width = max(content_width, font().width(text.to_string()));
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}
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content_width = max(content_width, widget_inner_rect().width());
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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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}
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void ListView::resize_event(ResizeEvent& event)
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{
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update_content_size();
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AbstractView::resize_event(event);
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}
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void ListView::did_update_model(unsigned flags)
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{
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AbstractView::did_update_model(flags);
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update_content_size();
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update();
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}
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Gfx::Rect ListView::content_rect(int row) const
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{
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return { 0, row * item_height(), content_width(), item_height() };
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}
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Gfx::Rect ListView::content_rect(const ModelIndex& index) const
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{
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return content_rect(index.row());
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}
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ModelIndex ListView::index_at_event_position(const Gfx::Point& point) const
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{
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ASSERT(model());
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auto adjusted_position = this->adjusted_position(point);
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for (int row = 0, row_count = model()->row_count(); row < row_count; ++row) {
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if (!content_rect(row).contains(adjusted_position))
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continue;
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return model()->index(row, m_model_column);
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}
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return {};
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}
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Gfx::Point ListView::adjusted_position(const Gfx::Point& position) const
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{
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return position.translated(horizontal_scrollbar().value() - frame_thickness(), vertical_scrollbar().value() - frame_thickness());
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}
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void ListView::paint_event(PaintEvent& event)
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{
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Frame::paint_event(event);
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if (!model())
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return;
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Painter painter(*this);
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painter.add_clip_rect(frame_inner_rect());
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painter.add_clip_rect(event.rect());
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painter.translate(frame_thickness(), frame_thickness());
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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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for (int row_index = 0; row_index < model()->row_count(); ++row_index) {
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bool is_selected_row = selection().contains_row(row_index);
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int y = painted_item_index * item_height();
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Color background_color;
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if (is_selected_row) {
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background_color = is_focused() ? palette().selection() : palette().inactive_selection();
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} else {
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Color row_fill_color = palette().color(background_role());
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if (alternating_row_colors() && (painted_item_index % 2)) {
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background_color = row_fill_color.darkened(0.8f);
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} else {
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background_color = row_fill_color;
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}
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}
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auto column_metadata = model()->column_metadata(m_model_column);
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Gfx::Rect row_rect(0, y, content_width(), item_height());
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painter.fill_rect(row_rect, background_color);
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auto index = model()->index(row_index, m_model_column);
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auto data = model()->data(index);
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auto font = font_for_index(index);
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if (data.is_bitmap()) {
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painter.blit(row_rect.location(), data.as_bitmap(), data.as_bitmap().rect());
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} else if (data.is_icon()) {
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if (auto bitmap = data.as_icon().bitmap_for_size(16))
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painter.blit(row_rect.location(), *bitmap, bitmap->rect());
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} else {
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Color text_color;
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if (is_selected_row)
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text_color = is_focused() ? palette().selection_text() : palette().inactive_selection_text();
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else
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text_color = model()->data(index, Model::Role::ForegroundColor).to_color(palette().color(foreground_role()));
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auto text_rect = row_rect;
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text_rect.move_by(horizontal_padding(), 0);
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text_rect.set_width(text_rect.width() - horizontal_padding() * 2);
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painter.draw_text(text_rect, data.to_string(), font, column_metadata.text_alignment, text_color);
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}
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++painted_item_index;
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};
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Gfx::Rect unpainted_rect(0, painted_item_index * item_height(), exposed_width, height());
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painter.fill_rect(unpainted_rect, palette().color(background_role()));
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}
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int ListView::item_count() const
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{
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if (!model())
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return 0;
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return model()->row_count();
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}
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void ListView::keydown_event(KeyEvent& 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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activate_selected();
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return;
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}
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if (event.key() == KeyCode::Key_Up) {
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ModelIndex new_index;
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if (!selection().is_empty()) {
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auto old_index = selection().first();
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new_index = model.index(old_index.row() - 1, old_index.column());
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} else {
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new_index = model.index(0, 0);
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}
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if (model.is_valid(new_index)) {
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selection().set(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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ModelIndex new_index;
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if (!selection().is_empty()) {
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auto old_index = selection().first();
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new_index = model.index(old_index.row() + 1, old_index.column());
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} else {
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new_index = model.index(0, 0);
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}
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if (model.is_valid(new_index)) {
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selection().set(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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auto old_index = selection().first();
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auto new_index = model.index(max(0, old_index.row() - items_per_page), old_index.column());
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if (model.is_valid(new_index)) {
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selection().set(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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auto old_index = selection().first();
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auto new_index = model.index(min(model.row_count() - 1, old_index.row() + items_per_page), old_index.column());
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if (model.is_valid(new_index)) {
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selection().set(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 Widget::keydown_event(event);
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}
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void ListView::scroll_into_view(const ModelIndex& index, Orientation orientation)
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{
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auto rect = content_rect(index.row());
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ScrollableWidget::scroll_into_view(rect, orientation);
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}
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void ListView::doubleclick_event(MouseEvent& event)
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{
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if (!model())
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return;
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if (event.button() == MouseButton::Left) {
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if (!selection().is_empty()) {
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if (is_editable())
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begin_editing(selection().first());
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else
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activate_selected();
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}
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}
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}
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}
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