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https://github.com/RGBCube/serenity
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28a2a01dc3
We can re-use the logic used for automatic scrolling in AbstractView when we're doing rubberband scrolling in IconView. This removes some duplicated code.
829 lines
30 KiB
C++
829 lines
30 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Utf8View.h>
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#include <LibCore/Timer.h>
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#include <LibGUI/IconView.h>
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#include <LibGUI/Model.h>
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#include <LibGUI/ModelEditingDelegate.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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REGISTER_WIDGET(GUI, IconView);
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namespace GUI {
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IconView::IconView()
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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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horizontal_scrollbar().set_visible(false);
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}
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IconView::~IconView()
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{
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}
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void IconView::select_all()
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{
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for (int item_index = 0; item_index < item_count(); ++item_index) {
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auto& item_data = m_item_data_cache[item_index];
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if (!item_data.selected) {
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if (item_data.is_valid())
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add_selection(item_data);
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else
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add_selection(model()->index(item_index, model_column()));
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}
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}
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}
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void IconView::scroll_into_view(const ModelIndex& index, bool scroll_horizontally, bool scroll_vertically)
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{
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if (!index.is_valid())
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return;
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AbstractScrollableWidget::scroll_into_view(item_rect(index.row()), scroll_horizontally, scroll_vertically);
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}
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void IconView::resize_event(ResizeEvent& event)
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{
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AbstractView::resize_event(event);
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update_content_size();
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if (!m_had_valid_size) {
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m_had_valid_size = true;
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if (!selection().is_empty())
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scroll_into_view(selection().first());
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}
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}
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void IconView::rebuild_item_cache() const
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{
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auto prev_item_count = m_item_data_cache.size();
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size_t new_item_count = item_count();
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auto items_to_invalidate = min(prev_item_count, new_item_count);
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// if the new number of items is less, check if any of the
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// ones not in the list anymore was selected
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for (size_t i = new_item_count; i < m_item_data_cache.size(); i++) {
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auto& item_data = m_item_data_cache[i];
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if (item_data.selected) {
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VERIFY(m_selected_count_cache > 0);
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m_selected_count_cache--;
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}
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}
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if ((size_t)m_first_selected_hint >= new_item_count)
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m_first_selected_hint = 0;
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m_item_data_cache.resize(new_item_count);
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for (size_t i = 0; i < items_to_invalidate; i++) {
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auto& item_data = m_item_data_cache[i];
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// TODO: It's unfortunate that we have no way to know whether any
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// data actually changed, so we have to invalidate *everyone*
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if (item_data.is_valid() /* && !model()->is_valid(item_data.index)*/)
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item_data.invalidate();
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if (item_data.selected && i < (size_t)m_first_selected_hint)
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m_first_selected_hint = (int)i;
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}
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m_item_data_cache_valid = true;
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}
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auto IconView::get_item_data(int item_index) const -> ItemData&
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{
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if (!m_item_data_cache_valid)
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rebuild_item_cache();
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auto& item_data = m_item_data_cache[item_index];
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if (item_data.is_valid())
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return item_data;
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item_data.index = model()->index(item_index, model_column());
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item_data.text = item_data.index.data().to_string();
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get_item_rects(item_index, item_data, font_for_index(item_data.index));
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item_data.valid = true;
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return item_data;
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}
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auto IconView::item_data_from_content_position(const Gfx::IntPoint& content_position) const -> ItemData*
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{
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if (!m_visual_row_count || !m_visual_column_count)
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return nullptr;
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int row, column;
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column_row_from_content_position(content_position, row, column);
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int item_index = (m_flow_direction == FlowDirection::LeftToRight)
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? row * m_visual_column_count + column
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: column * m_visual_row_count + row;
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if (item_index < 0 || item_index >= item_count())
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return nullptr;
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return &get_item_data(item_index);
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}
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void IconView::model_did_update(unsigned flags)
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{
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AbstractView::model_did_update(flags);
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if (!model() || (flags & GUI::Model::InvalidateAllIndices)) {
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m_item_data_cache.clear();
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AbstractView::clear_selection();
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m_selected_count_cache = 0;
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m_first_selected_hint = 0;
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}
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m_item_data_cache_valid = false;
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update_content_size();
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update();
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}
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void IconView::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;
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int content_height;
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if (m_flow_direction == FlowDirection::LeftToRight) {
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m_visual_column_count = max(1, available_size().width() / effective_item_size().width());
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if (m_visual_column_count)
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m_visual_row_count = ceil_div(model()->row_count(), m_visual_column_count);
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else
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m_visual_row_count = 0;
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content_width = m_visual_column_count * effective_item_size().width();
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content_height = m_visual_row_count * effective_item_size().height();
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} else {
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m_visual_row_count = max(1, available_size().height() / effective_item_size().height());
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if (m_visual_row_count)
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m_visual_column_count = ceil_div(model()->row_count(), m_visual_row_count);
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else
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m_visual_column_count = 0;
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content_width = m_visual_column_count * effective_item_size().width();
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content_height = available_size().height();
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}
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set_content_size({ content_width, content_height });
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if (!m_item_data_cache_valid)
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rebuild_item_cache();
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for (int item_index = 0; item_index < item_count(); item_index++) {
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auto& item_data = m_item_data_cache[item_index];
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if (item_data.is_valid())
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update_item_rects(item_index, item_data);
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}
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}
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Gfx::IntRect IconView::item_rect(int item_index) const
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{
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if (!m_visual_row_count || !m_visual_column_count)
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return {};
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int visual_row_index;
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int visual_column_index;
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if (m_flow_direction == FlowDirection::LeftToRight) {
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visual_row_index = item_index / m_visual_column_count;
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visual_column_index = item_index % m_visual_column_count;
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} else {
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visual_row_index = item_index % m_visual_row_count;
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visual_column_index = item_index / m_visual_row_count;
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}
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return {
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visual_column_index * effective_item_size().width(),
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visual_row_index * effective_item_size().height(),
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effective_item_size().width(),
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effective_item_size().height()
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};
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}
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ModelIndex IconView::index_at_event_position(const Gfx::IntPoint& position) const
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{
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VERIFY(model());
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auto adjusted_position = to_content_position(position);
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if (auto item_data = item_data_from_content_position(adjusted_position)) {
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if (item_data->is_containing(adjusted_position))
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return item_data->index;
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}
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return {};
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}
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void IconView::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::Primary)
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return AbstractView::mousedown_event(event);
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auto index = index_at_event_position(event.position());
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if (index.is_valid()) {
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// We might start dragging this item, but not rubber-banding.
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return AbstractView::mousedown_event(event);
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}
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if (!(event.modifiers() & Mod_Ctrl)) {
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clear_selection();
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}
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auto adjusted_position = to_content_position(event.position());
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m_might_drag = false;
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if (selection_mode() == SelectionMode::MultiSelection) {
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m_rubber_banding = true;
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m_rubber_band_origin = adjusted_position;
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m_rubber_band_current = adjusted_position;
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}
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}
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void IconView::mouseup_event(MouseEvent& event)
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{
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if (m_rubber_banding && event.button() == MouseButton::Primary) {
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m_rubber_banding = false;
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set_automatic_scrolling_timer(false);
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update(to_widget_rect(Gfx::IntRect::from_two_points(m_rubber_band_origin, m_rubber_band_current)));
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}
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AbstractView::mouseup_event(event);
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}
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bool IconView::update_rubber_banding(const Gfx::IntPoint& input_position)
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{
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auto adjusted_position = to_content_position(input_position.constrained(widget_inner_rect()));
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if (m_rubber_band_current != adjusted_position) {
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auto prev_rect = Gfx::IntRect::from_two_points(m_rubber_band_origin, m_rubber_band_current);
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auto prev_rubber_band_fill_rect = prev_rect.shrunken(1, 1);
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m_rubber_band_current = adjusted_position;
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auto rubber_band_rect = Gfx::IntRect::from_two_points(m_rubber_band_origin, m_rubber_band_current);
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auto rubber_band_fill_rect = rubber_band_rect.shrunken(1, 1);
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for (auto& rect : prev_rubber_band_fill_rect.shatter(rubber_band_fill_rect))
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update(to_widget_rect(rect.inflated(1, 1)));
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for (auto& rect : rubber_band_fill_rect.shatter(prev_rubber_band_fill_rect))
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update(to_widget_rect(rect.inflated(1, 1)));
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// If the rectangle width or height is 0, we still want to be able
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// to match the items in the path. An easy work-around for this
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// is to simply set the width or height to 1
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auto ensure_rect = [](Gfx::IntRect& rect) {
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if (rect.width() <= 0)
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rect.set_width(1);
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if (rect.height() <= 0)
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rect.set_height(1);
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};
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ensure_rect(prev_rect);
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ensure_rect(rubber_band_rect);
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// Clearing the entire selection every time is very expensive,
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// determine what items may need to be deselected and what new
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// items may need to be selected. Avoid a ton of allocations.
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auto deselect_area = prev_rect.shatter(rubber_band_rect);
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auto select_area = rubber_band_rect.shatter(prev_rect);
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// Initialize all candidate's toggle flag. We need to know which
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// items we touched because the various rectangles likely will
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// contain the same item more than once
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for_each_item_intersecting_rects(deselect_area, [](ItemData& item_data) -> IterationDecision {
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item_data.selection_toggled = false;
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return IterationDecision::Continue;
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});
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for_each_item_intersecting_rects(select_area, [](ItemData& item_data) -> IterationDecision {
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item_data.selection_toggled = false;
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return IterationDecision::Continue;
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});
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// We're changing the selection and invalidating those items, so
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// no need to trigger a full re-render for each item
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set_suppress_update_on_selection_change(true);
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// Now toggle all items that are no longer in the selected area, once only
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for_each_item_intersecting_rects(deselect_area, [&](ItemData& item_data) -> IterationDecision {
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if (!item_data.selection_toggled && item_data.is_intersecting(prev_rect) && !item_data.is_intersecting(rubber_band_rect)) {
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item_data.selection_toggled = true;
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toggle_selection(item_data);
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update(to_widget_rect(item_data.rect()));
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}
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return IterationDecision::Continue;
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});
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// Now toggle all items that are in the new selected area, once only
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for_each_item_intersecting_rects(select_area, [&](ItemData& item_data) -> IterationDecision {
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if (!item_data.selection_toggled && !item_data.is_intersecting(prev_rect) && item_data.is_intersecting(rubber_band_rect)) {
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item_data.selection_toggled = true;
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toggle_selection(item_data);
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update(to_widget_rect(item_data.rect()));
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}
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return IterationDecision::Continue;
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});
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set_suppress_update_on_selection_change(false);
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return true;
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}
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return false;
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}
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void IconView::mousemove_event(MouseEvent& event)
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{
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if (!model())
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return AbstractView::mousemove_event(event);
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m_rubber_band_scroll_delta = automatic_scroll_delta_from_position(event.position());
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if (m_rubber_banding) {
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m_out_of_view_position = event.position();
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set_automatic_scrolling_timer(!m_rubber_band_scroll_delta.is_null());
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if (update_rubber_banding(event.position()))
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return;
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}
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AbstractView::mousemove_event(event);
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}
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void IconView::on_automatic_scrolling_timer_fired()
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{
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AbstractView::on_automatic_scrolling_timer_fired();
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if (m_rubber_band_scroll_delta.is_null())
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return;
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vertical_scrollbar().increase_slider_by(m_rubber_band_scroll_delta.y());
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horizontal_scrollbar().increase_slider_by(m_rubber_band_scroll_delta.x());
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update_rubber_banding(m_out_of_view_position);
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}
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void IconView::update_item_rects(int item_index, ItemData& item_data) const
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{
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auto item_rect = this->item_rect(item_index);
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item_data.icon_rect.center_within(item_rect);
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item_data.icon_rect.translate_by(0, item_data.icon_offset_y);
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item_data.text_rect.center_horizontally_within(item_rect);
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item_data.text_rect.set_top(item_rect.y() + item_data.text_offset_y);
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}
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Gfx::IntRect IconView::content_rect(ModelIndex const& index) const
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{
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if (!index.is_valid())
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return {};
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auto& item_data = get_item_data(index.row());
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return item_data.rect();
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}
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Gfx::IntRect IconView::editing_rect(ModelIndex const& index) const
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{
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if (!index.is_valid())
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return {};
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auto& item_data = get_item_data(index.row());
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auto editing_rect = item_data.text_rect;
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editing_rect.set_height(font_for_index(index)->glyph_height() + 8);
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editing_rect.set_y(item_data.text_rect.y() - 2);
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return editing_rect;
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}
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void IconView::editing_widget_did_change(const ModelIndex& index)
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{
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if (m_editing_delegate->value().is_string()) {
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auto text_width = font_for_index(index)->width(m_editing_delegate->value().as_string());
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m_edit_widget_content_rect.set_width(min(text_width + 8, effective_item_size().width()));
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m_edit_widget_content_rect.center_horizontally_within(editing_rect(index).translated(frame_thickness(), frame_thickness()));
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update_edit_widget_position();
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}
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}
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Gfx::IntRect
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IconView::paint_invalidation_rect(const ModelIndex& index) const
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{
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if (!index.is_valid())
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return {};
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auto& item_data = get_item_data(index.row());
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return item_data.rect(true);
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}
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void IconView::did_change_hovered_index(const ModelIndex& old_index, const ModelIndex& new_index)
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{
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AbstractView::did_change_hovered_index(old_index, new_index);
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if (old_index.is_valid())
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get_item_rects(old_index.row(), get_item_data(old_index.row()), font_for_index(old_index));
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if (new_index.is_valid())
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get_item_rects(new_index.row(), get_item_data(new_index.row()), font_for_index(new_index));
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}
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void IconView::did_change_cursor_index(const ModelIndex& old_index, const ModelIndex& new_index)
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{
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AbstractView::did_change_cursor_index(old_index, new_index);
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if (old_index.is_valid())
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get_item_rects(old_index.row(), get_item_data(old_index.row()), font_for_index(old_index));
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if (new_index.is_valid())
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get_item_rects(new_index.row(), get_item_data(new_index.row()), font_for_index(new_index));
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}
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void IconView::get_item_rects(int item_index, ItemData& item_data, const Gfx::Font& font) const
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{
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auto item_rect = this->item_rect(item_index);
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item_data.icon_rect = Gfx::IntRect(0, 0, 32, 32).centered_within(item_rect);
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item_data.icon_offset_y = -font.glyph_height() - 6;
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item_data.icon_rect.translate_by(0, item_data.icon_offset_y);
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int unwrapped_text_width = font.width(item_data.text);
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int available_width = item_rect.width() - 6;
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item_data.text_rect = { 0, item_data.icon_rect.bottom() + 6 + 1, 0, font.glyph_height() };
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item_data.wrapped_text_lines.clear();
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if ((unwrapped_text_width > available_width) && (item_data.selected || m_hovered_index == item_data.index || cursor_index() == item_data.index || m_always_wrap_item_labels)) {
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int current_line_width = 0;
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int current_line_start = 0;
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int widest_line_width = 0;
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Utf8View utf8_view(item_data.text);
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auto it = utf8_view.begin();
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for (; it != utf8_view.end(); ++it) {
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auto code_point = *it;
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auto glyph_width = font.glyph_width(code_point);
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if ((current_line_width + glyph_width + font.glyph_spacing()) > available_width) {
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item_data.wrapped_text_lines.append(item_data.text.substring_view(current_line_start, utf8_view.byte_offset_of(it) - current_line_start));
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current_line_start = utf8_view.byte_offset_of(it);
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current_line_width = glyph_width;
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} else {
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current_line_width += glyph_width + font.glyph_spacing();
|
|
}
|
|
widest_line_width = max(widest_line_width, current_line_width);
|
|
}
|
|
if (current_line_width > 0) {
|
|
item_data.wrapped_text_lines.append(item_data.text.substring_view(current_line_start, utf8_view.byte_offset_of(it) - current_line_start));
|
|
}
|
|
item_data.text_rect.set_width(widest_line_width);
|
|
item_data.text_rect.center_horizontally_within(item_rect);
|
|
item_data.text_rect.intersect(item_rect);
|
|
item_data.text_rect.set_height(font.glyph_height() * item_data.wrapped_text_lines.size());
|
|
item_data.text_rect.inflate(6, 6);
|
|
item_data.text_rect_wrapped = item_data.text_rect;
|
|
} else {
|
|
item_data.text_rect.set_width(unwrapped_text_width);
|
|
item_data.text_rect.inflate(6, 6);
|
|
if (item_data.text_rect.width() > available_width)
|
|
item_data.text_rect.set_width(available_width);
|
|
item_data.text_rect.center_horizontally_within(item_rect);
|
|
}
|
|
item_data.text_rect.intersect(item_rect);
|
|
item_data.text_offset_y = item_data.text_rect.y() - item_rect.y();
|
|
}
|
|
|
|
void IconView::second_paint_event(PaintEvent& event)
|
|
{
|
|
if (!m_rubber_banding)
|
|
return;
|
|
|
|
Painter painter(*this);
|
|
painter.add_clip_rect(event.rect());
|
|
painter.add_clip_rect(widget_inner_rect());
|
|
painter.translate(frame_thickness(), frame_thickness());
|
|
painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
|
|
|
|
auto rubber_band_rect = Gfx::IntRect::from_two_points(m_rubber_band_origin, m_rubber_band_current);
|
|
painter.fill_rect(rubber_band_rect, palette().rubber_band_fill());
|
|
painter.draw_rect(rubber_band_rect, palette().rubber_band_border());
|
|
}
|
|
|
|
void IconView::paint_event(PaintEvent& event)
|
|
{
|
|
Color widget_background_color = palette().color(background_role());
|
|
Frame::paint_event(event);
|
|
|
|
Painter painter(*this);
|
|
painter.add_clip_rect(widget_inner_rect());
|
|
painter.add_clip_rect(event.rect());
|
|
|
|
painter.fill_rect(event.rect(), fill_with_background_color() ? widget_background_color : Color::Transparent);
|
|
|
|
if (!model())
|
|
return;
|
|
|
|
painter.translate(frame_thickness(), frame_thickness());
|
|
painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
|
|
|
|
auto selection_color = is_focused() ? palette().selection() : palette().inactive_selection();
|
|
|
|
for_each_item_intersecting_rect(to_content_rect(event.rect()), [&](auto& item_data) -> IterationDecision {
|
|
Color background_color;
|
|
if (item_data.selected) {
|
|
background_color = selection_color;
|
|
} else {
|
|
if (fill_with_background_color())
|
|
background_color = widget_background_color;
|
|
}
|
|
|
|
auto icon = item_data.index.data(ModelRole::Icon);
|
|
|
|
if (icon.is_icon()) {
|
|
if (auto bitmap = icon.as_icon().bitmap_for_size(item_data.icon_rect.width())) {
|
|
Gfx::IntRect destination = bitmap->rect();
|
|
destination.center_within(item_data.icon_rect);
|
|
|
|
if (item_data.selected) {
|
|
auto tint = selection_color.with_alpha(100);
|
|
painter.blit_filtered(destination.location(), *bitmap, bitmap->rect(), [&](auto src) { return src.blend(tint); });
|
|
} else if (m_hovered_index.is_valid() && m_hovered_index == item_data.index) {
|
|
painter.blit_brightened(destination.location(), *bitmap, bitmap->rect());
|
|
} else {
|
|
auto opacity = item_data.index.data(ModelRole::IconOpacity).as_float_or(1.0f);
|
|
painter.blit(destination.location(), *bitmap, bitmap->rect(), opacity);
|
|
}
|
|
}
|
|
}
|
|
|
|
auto font = font_for_index(item_data.index);
|
|
|
|
const auto& text_rect = item_data.text_rect;
|
|
|
|
if (m_edit_index != item_data.index)
|
|
painter.fill_rect(text_rect, background_color);
|
|
|
|
if (is_focused() && item_data.index == cursor_index()) {
|
|
painter.draw_rect(text_rect, widget_background_color);
|
|
painter.draw_focus_rect(text_rect, palette().focus_outline());
|
|
}
|
|
|
|
if (!item_data.wrapped_text_lines.is_empty()) {
|
|
// Item text would not fit in the item text rect, let's break it up into lines..
|
|
|
|
const auto& lines = item_data.wrapped_text_lines;
|
|
size_t number_of_text_lines = min((size_t)text_rect.height() / font->glyph_height(), lines.size());
|
|
size_t previous_line_lengths = 0;
|
|
for (size_t line_index = 0; line_index < number_of_text_lines; ++line_index) {
|
|
Gfx::IntRect line_rect;
|
|
line_rect.set_width(text_rect.width());
|
|
line_rect.set_height(font->glyph_height());
|
|
line_rect.center_horizontally_within(item_data.text_rect);
|
|
line_rect.set_y(3 + item_data.text_rect.y() + line_index * font->glyph_height());
|
|
line_rect.inflate(6, 0);
|
|
|
|
// Shrink the line_rect on the last line to apply elision if there are more lines.
|
|
if (number_of_text_lines - 1 == line_index && lines.size() > number_of_text_lines)
|
|
line_rect.inflate(-(6 + 2 * font->max_glyph_width()), 0);
|
|
|
|
draw_item_text(painter, item_data.index, item_data.selected, line_rect, lines[line_index], font, Gfx::TextAlignment::Center, Gfx::TextElision::Right, previous_line_lengths);
|
|
previous_line_lengths += lines[line_index].length();
|
|
}
|
|
} else {
|
|
draw_item_text(painter, item_data.index, item_data.selected, item_data.text_rect, item_data.text, font, Gfx::TextAlignment::Center, Gfx::TextElision::Right);
|
|
}
|
|
|
|
if (has_pending_drop() && item_data.index == drop_candidate_index()) {
|
|
// FIXME: This visualization is not great, as it's also possible to drop things on the text label..
|
|
painter.draw_rect(item_data.icon_rect.inflated(8, 8), palette().selection(), true);
|
|
}
|
|
return IterationDecision::Continue;
|
|
});
|
|
}
|
|
|
|
int IconView::item_count() const
|
|
{
|
|
if (!model())
|
|
return 0;
|
|
return model()->row_count();
|
|
}
|
|
|
|
void IconView::did_update_selection()
|
|
{
|
|
AbstractView::did_update_selection();
|
|
if (m_changing_selection)
|
|
return;
|
|
|
|
// Selection was modified externally, we need to synchronize our cache
|
|
do_clear_selection();
|
|
selection().for_each_index([&](const ModelIndex& index) {
|
|
if (index.is_valid()) {
|
|
auto item_index = model_index_to_item_index(index);
|
|
if ((size_t)item_index < m_item_data_cache.size())
|
|
do_add_selection(get_item_data(item_index));
|
|
}
|
|
});
|
|
}
|
|
|
|
void IconView::do_clear_selection()
|
|
{
|
|
for (size_t item_index = m_first_selected_hint; item_index < m_item_data_cache.size(); item_index++) {
|
|
if (m_selected_count_cache == 0)
|
|
break;
|
|
auto& item_data = m_item_data_cache[item_index];
|
|
if (!item_data.selected)
|
|
continue;
|
|
item_data.selected = false;
|
|
m_selected_count_cache--;
|
|
}
|
|
m_first_selected_hint = 0;
|
|
VERIFY(m_selected_count_cache == 0);
|
|
}
|
|
|
|
void IconView::clear_selection()
|
|
{
|
|
TemporaryChange change(m_changing_selection, true);
|
|
AbstractView::clear_selection();
|
|
do_clear_selection();
|
|
}
|
|
|
|
bool IconView::do_add_selection(ItemData& item_data)
|
|
{
|
|
if (!item_data.selected) {
|
|
item_data.selected = true;
|
|
m_selected_count_cache++;
|
|
int item_index = &item_data - &m_item_data_cache[0];
|
|
if (m_first_selected_hint > item_index)
|
|
m_first_selected_hint = item_index;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void IconView::add_selection(ItemData& item_data)
|
|
{
|
|
if (do_add_selection(item_data))
|
|
AbstractView::add_selection(item_data.index);
|
|
}
|
|
|
|
void IconView::add_selection(const ModelIndex& new_index)
|
|
{
|
|
TemporaryChange change(m_changing_selection, true);
|
|
auto item_index = model_index_to_item_index(new_index);
|
|
add_selection(get_item_data(item_index));
|
|
}
|
|
|
|
void IconView::toggle_selection(ItemData& item_data)
|
|
{
|
|
if (!item_data.selected)
|
|
add_selection(item_data);
|
|
else
|
|
remove_item_selection(item_data);
|
|
}
|
|
|
|
void IconView::toggle_selection(const ModelIndex& new_index)
|
|
{
|
|
TemporaryChange change(m_changing_selection, true);
|
|
auto item_index = model_index_to_item_index(new_index);
|
|
toggle_selection(get_item_data(item_index));
|
|
}
|
|
|
|
void IconView::remove_item_selection(ItemData& item_data)
|
|
{
|
|
if (!item_data.selected)
|
|
return;
|
|
|
|
TemporaryChange change(m_changing_selection, true);
|
|
item_data.selected = false;
|
|
VERIFY(m_selected_count_cache > 0);
|
|
m_selected_count_cache--;
|
|
int item_index = &item_data - &m_item_data_cache[0];
|
|
if (m_first_selected_hint == item_index) {
|
|
m_first_selected_hint = 0;
|
|
while ((size_t)item_index < m_item_data_cache.size()) {
|
|
if (m_item_data_cache[item_index].selected) {
|
|
m_first_selected_hint = item_index;
|
|
break;
|
|
}
|
|
item_index++;
|
|
}
|
|
}
|
|
AbstractView::remove_selection(item_data.index);
|
|
}
|
|
|
|
void IconView::set_selection(const ModelIndex& new_index)
|
|
{
|
|
TemporaryChange change(m_changing_selection, true);
|
|
do_clear_selection();
|
|
auto item_index = model_index_to_item_index(new_index);
|
|
auto& item_data = get_item_data(item_index);
|
|
item_data.selected = true;
|
|
m_selected_count_cache = 1;
|
|
if (item_index < m_first_selected_hint)
|
|
m_first_selected_hint = item_index;
|
|
AbstractView::set_selection(new_index);
|
|
}
|
|
|
|
int IconView::items_per_page() const
|
|
{
|
|
if (m_flow_direction == FlowDirection::LeftToRight)
|
|
return (visible_content_rect().height() / effective_item_size().height()) * m_visual_column_count;
|
|
return (visible_content_rect().width() / effective_item_size().width()) * m_visual_row_count;
|
|
}
|
|
|
|
void IconView::move_cursor(CursorMovement movement, SelectionUpdate selection_update)
|
|
{
|
|
if (!model())
|
|
return;
|
|
auto& model = *this->model();
|
|
|
|
if (!cursor_index().is_valid()) {
|
|
set_cursor(model.index(0, model_column()), SelectionUpdate::Set);
|
|
return;
|
|
}
|
|
|
|
auto new_row = cursor_index().row();
|
|
|
|
switch (movement) {
|
|
case CursorMovement::Right:
|
|
if (m_flow_direction == FlowDirection::LeftToRight)
|
|
new_row += 1;
|
|
else
|
|
new_row += m_visual_row_count;
|
|
break;
|
|
case CursorMovement::Left:
|
|
if (m_flow_direction == FlowDirection::LeftToRight)
|
|
new_row -= 1;
|
|
else
|
|
new_row -= m_visual_row_count;
|
|
break;
|
|
case CursorMovement::Up:
|
|
if (m_flow_direction == FlowDirection::LeftToRight)
|
|
new_row -= m_visual_column_count;
|
|
else
|
|
new_row -= 1;
|
|
break;
|
|
case CursorMovement::Down:
|
|
if (m_flow_direction == FlowDirection::LeftToRight)
|
|
new_row += m_visual_column_count;
|
|
else
|
|
new_row += 1;
|
|
break;
|
|
case CursorMovement::PageUp:
|
|
new_row = max(0, cursor_index().row() - items_per_page());
|
|
break;
|
|
|
|
case CursorMovement::PageDown:
|
|
new_row = min(model.row_count() - 1, cursor_index().row() + items_per_page());
|
|
break;
|
|
|
|
case CursorMovement::Home:
|
|
new_row = 0;
|
|
break;
|
|
case CursorMovement::End:
|
|
new_row = model.row_count() - 1;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
auto new_index = model.index(new_row, cursor_index().column());
|
|
if (new_index.is_valid())
|
|
set_cursor(new_index, selection_update);
|
|
}
|
|
|
|
void IconView::set_flow_direction(FlowDirection flow_direction)
|
|
{
|
|
if (m_flow_direction == flow_direction)
|
|
return;
|
|
m_flow_direction = flow_direction;
|
|
m_item_data_cache.clear();
|
|
m_item_data_cache_valid = false;
|
|
update();
|
|
}
|
|
|
|
template<typename Function>
|
|
inline IterationDecision IconView::for_each_item_intersecting_rect(const Gfx::IntRect& rect, Function f) const
|
|
{
|
|
VERIFY(model());
|
|
if (rect.is_empty())
|
|
return IterationDecision::Continue;
|
|
int begin_row, begin_column;
|
|
column_row_from_content_position(rect.top_left(), begin_row, begin_column);
|
|
int end_row, end_column;
|
|
column_row_from_content_position(rect.bottom_right(), end_row, end_column);
|
|
|
|
int items_per_flow_axis_step;
|
|
int item_index;
|
|
int last_index;
|
|
if (m_flow_direction == FlowDirection::LeftToRight) {
|
|
items_per_flow_axis_step = end_column - begin_column + 1;
|
|
item_index = max(0, begin_row * m_visual_column_count + begin_column);
|
|
last_index = min(item_count(), end_row * m_visual_column_count + end_column + 1);
|
|
} else {
|
|
items_per_flow_axis_step = end_row - begin_row + 1;
|
|
item_index = max(0, begin_column * m_visual_row_count + begin_row);
|
|
last_index = min(item_count(), end_column * m_visual_row_count + end_row + 1);
|
|
}
|
|
|
|
while (item_index < last_index) {
|
|
for (int i = item_index; i < min(item_index + items_per_flow_axis_step, last_index); i++) {
|
|
auto& item_data = get_item_data(i);
|
|
if (item_data.is_intersecting(rect)) {
|
|
auto decision = f(item_data);
|
|
if (decision != IterationDecision::Continue)
|
|
return decision;
|
|
}
|
|
}
|
|
item_index += (m_flow_direction == FlowDirection::LeftToRight) ? m_visual_column_count : m_visual_row_count;
|
|
};
|
|
|
|
return IterationDecision::Continue;
|
|
}
|
|
|
|
template<typename Function>
|
|
inline IterationDecision IconView::for_each_item_intersecting_rects(const Vector<Gfx::IntRect>& rects, Function f) const
|
|
{
|
|
for (auto& rect : rects) {
|
|
auto decision = for_each_item_intersecting_rect(rect, f);
|
|
if (decision != IterationDecision::Continue)
|
|
return decision;
|
|
}
|
|
return IterationDecision::Continue;
|
|
}
|
|
}
|