mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-10-31 05:10:57 +00:00
278b307713
If a model doesn't specify a text alignment for a given field, we now fall back to CenterLeft. This will look better than Center in the vast majority of cases.
265 lines
8.7 KiB
C++
265 lines
8.7 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_fill_with_background_color(true);
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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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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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auto text_alignment = model()->data(index, Model::Role::TextAlignment).to_text_alignment(Gfx::TextAlignment::CenterLeft);
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painter.draw_text(text_rect, data.to_string(), font, 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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if (fill_with_background_color())
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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::move_selection(int steps)
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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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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() + steps, 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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}
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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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move_selection(-1);
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return;
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}
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if (event.key() == KeyCode::Key_Down) {
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move_selection(1);
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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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