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https://github.com/LadybirdBrowser/ladybird.git
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44e371635e
This patch introduces the HeaderView class, which is a widget that implements the column headers of TableView and TreeView. This greatly simplifies event management in the view implementations and also makes it much easier to eventually implement row headers.
333 lines
10 KiB
C++
333 lines
10 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 <AK/StringBuilder.h>
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#include <AK/Vector.h>
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#include <LibGUI/AbstractTableView.h>
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#include <LibGUI/Action.h>
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#include <LibGUI/HeaderView.h>
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#include <LibGUI/Menu.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 <LibGUI/Window.h>
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#include <LibGfx/Palette.h>
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namespace GUI {
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AbstractTableView::AbstractTableView()
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{
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m_column_header = add<HeaderView>(*this, Gfx::Orientation::Horizontal);
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m_column_header->move_to_back();
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set_should_hide_unnecessary_scrollbars(true);
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}
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AbstractTableView::~AbstractTableView()
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{
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}
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void AbstractTableView::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);
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selection().add(index);
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}
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}
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void AbstractTableView::update_column_sizes()
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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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int column_count = model.column_count();
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int row_count = model.row_count();
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for (int column = 0; column < column_count; ++column) {
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if (!column_header().is_section_visible(column))
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continue;
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int header_width = m_column_header->font().width(model.column_name(column));
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if (column == m_key_column && model.is_column_sortable(column))
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header_width += font().width(" \xE2\xAC\x86"); // UPWARDS BLACK ARROW
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int column_width = header_width;
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for (int row = 0; row < row_count; ++row) {
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auto cell_data = model.index(row, column).data();
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int cell_width = 0;
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if (cell_data.is_icon()) {
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cell_width = item_height();
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} else if (cell_data.is_bitmap()) {
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cell_width = cell_data.as_bitmap().width();
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} else if (cell_data.is_valid()) {
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cell_width = font().width(cell_data.to_string());
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}
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column_width = max(column_width, cell_width);
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}
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column_header().set_section_size(column, max(m_column_header->section_size(column), column_width));
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}
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}
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void AbstractTableView::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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int column_count = model()->column_count();
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for (int i = 0; i < column_count; ++i) {
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if (column_header().is_section_visible(i))
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content_width += column_width(i) + horizontal_padding() * 2;
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}
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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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column_header().set_width(content_width);
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set_size_occupied_by_fixed_elements({ 0, m_column_header->height() });
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}
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TableCellPaintingDelegate* AbstractTableView::column_painting_delegate(int column) const
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{
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// FIXME: This should return a const pointer I think..
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return const_cast<TableCellPaintingDelegate*>(m_column_painting_delegate.get(column).value_or(nullptr));
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}
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void AbstractTableView::set_cell_painting_delegate(int column, OwnPtr<TableCellPaintingDelegate> delegate)
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{
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if (!delegate)
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m_column_painting_delegate.remove(column);
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else
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m_column_painting_delegate.set(column, move(delegate));
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}
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int AbstractTableView::column_width(int column_index) const
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{
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if (!model())
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return 0;
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return m_column_header->section_size(column_index);
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}
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void AbstractTableView::set_column_width(int column, int width)
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{
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column_header().set_section_size(column, width);
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}
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Gfx::TextAlignment AbstractTableView::column_header_alignment(int column_index) const
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{
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if (!model())
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return Gfx::TextAlignment::CenterLeft;
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return m_column_header->section_alignment(column_index);
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}
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void AbstractTableView::set_column_header_alignment(int column, Gfx::TextAlignment alignment)
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{
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column_header().set_section_alignment(column, alignment);
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}
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void AbstractTableView::mousedown_event(MouseEvent& event)
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{
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if (!model())
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return AbstractView::mousedown_event(event);
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if (event.button() != MouseButton::Left)
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return AbstractView::mousedown_event(event);
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auto adjusted_position = this->adjusted_position(event.position());
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Gfx::IntPoint horizontally_adjusted_position(adjusted_position.x(), event.position().y());
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bool is_toggle;
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auto index = index_at_event_position(event.position(), is_toggle);
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if (index.is_valid() && is_toggle && model()->row_count(index)) {
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toggle_index(index);
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return;
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}
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AbstractView::mousedown_event(event);
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}
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ModelIndex AbstractTableView::index_at_event_position(const Gfx::IntPoint& position, bool& is_toggle) const
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{
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is_toggle = false;
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if (!model())
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return {};
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auto adjusted_position = this->adjusted_position(position);
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for (int row = 0, row_count = model()->row_count(); row < row_count; ++row) {
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if (!row_rect(row).contains(adjusted_position))
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continue;
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for (int column = 0, column_count = model()->column_count(); column < column_count; ++column) {
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if (!content_rect(row, column).contains(adjusted_position))
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continue;
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return model()->index(row, column);
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}
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return model()->index(row, 0);
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}
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return {};
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}
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ModelIndex AbstractTableView::index_at_event_position(const Gfx::IntPoint& position) const
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{
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bool is_toggle;
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auto index = index_at_event_position(position, is_toggle);
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return is_toggle ? ModelIndex() : index;
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}
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int AbstractTableView::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 AbstractTableView::move_selection(int vertical_steps, int horizontal_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() + vertical_steps, old_index.column() + horizontal_steps);
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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 AbstractTableView::scroll_into_view(const ModelIndex& index, Orientation orientation)
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{
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auto rect = row_rect(index.row()).translated(0, -m_column_header->height());
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ScrollableWidget::scroll_into_view(rect, orientation);
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}
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void AbstractTableView::scroll_into_view(const ModelIndex& index, bool scroll_horizontally, bool scroll_vertically)
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{
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auto rect = row_rect(index.row()).translated(0, -m_column_header->height());
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ScrollableWidget::scroll_into_view(rect, scroll_horizontally, scroll_vertically);
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}
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void AbstractTableView::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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activate_or_edit_selected();
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}
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}
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void AbstractTableView::context_menu_event(ContextMenuEvent& event)
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{
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if (!model())
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return;
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bool is_toggle;
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auto index = index_at_event_position(event.position(), is_toggle);
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if (index.is_valid()) {
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if (!selection().contains(index))
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selection().set(index);
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} else {
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selection().clear();
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}
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if (on_context_menu_request)
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on_context_menu_request(index, event);
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}
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Gfx::IntRect AbstractTableView::content_rect(int row, int column) const
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{
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auto row_rect = this->row_rect(row);
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int x = 0;
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for (int i = 0; i < column; ++i)
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x += column_width(i) + horizontal_padding() * 2;
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return { row_rect.x() + x, row_rect.y(), column_width(column) + horizontal_padding() * 2, item_height() };
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}
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Gfx::IntRect AbstractTableView::content_rect(const ModelIndex& index) const
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{
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return content_rect(index.row(), index.column());
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}
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Gfx::IntRect AbstractTableView::row_rect(int item_index) const
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{
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return { 0, m_column_header->height() + (item_index * item_height()), max(content_size().width(), width()), item_height() };
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}
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Gfx::IntPoint AbstractTableView::adjusted_position(const Gfx::IntPoint& 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 AbstractTableView::did_update_model(unsigned flags)
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{
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AbstractView::did_update_model(flags);
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update_column_sizes();
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update_content_size();
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update();
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}
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void AbstractTableView::resize_event(ResizeEvent& event)
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{
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AbstractView::resize_event(event);
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if (column_header().is_visible())
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column_header().set_relative_rect(frame_thickness(), frame_thickness(), content_width(), column_header().preferred_size().height());
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}
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void AbstractTableView::header_did_change_section_size(Badge<HeaderView>, Gfx::Orientation, int, int)
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{
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update_content_size();
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update();
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}
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void AbstractTableView::header_did_change_section_visibility(Badge<HeaderView>, Gfx::Orientation, int, bool)
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{
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update_content_size();
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update();
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}
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void AbstractTableView::set_column_hidden(int column, bool hidden)
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{
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column_header().set_section_visible(column, !hidden);
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}
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void AbstractTableView::set_column_headers_visible(bool visible)
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{
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column_header().set_visible(visible);
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}
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void AbstractTableView::did_scroll()
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{
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AbstractView::did_scroll();
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column_header().set_x(frame_thickness() + -horizontal_scrollbar().value());
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}
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}
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