94ca55cefd
As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
485 lines
17 KiB
C++
485 lines
17 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 <Kernel/KeyCode.h>
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#include <LibDraw/Palette.h>
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#include <LibGUI/GDragOperation.h>
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#include <LibGUI/GItemView.h>
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#include <LibGUI/GModel.h>
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#include <LibGUI/GPainter.h>
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#include <LibGUI/GScrollBar.h>
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GItemView::GItemView(GWidget* parent)
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: GAbstractView(parent)
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{
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set_background_role(ColorRole::Base);
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set_foreground_role(ColorRole::BaseText);
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set_frame_shape(FrameShape::Container);
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set_frame_shadow(FrameShadow::Sunken);
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set_frame_thickness(2);
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horizontal_scrollbar().set_visible(false);
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}
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GItemView::~GItemView()
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{
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}
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void GItemView::scroll_into_view(const GModelIndex& index, Orientation orientation)
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{
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GScrollableWidget::scroll_into_view(item_rect(index.row()), orientation);
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}
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void GItemView::resize_event(GResizeEvent& event)
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{
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GAbstractView::resize_event(event);
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update_content_size();
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}
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void GItemView::did_update_model()
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{
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GAbstractView::did_update_model();
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update_content_size();
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update();
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}
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void GItemView::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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m_visual_column_count = 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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int content_width = available_size().width();
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int content_height = m_visual_row_count * effective_item_size().height();
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set_content_size({ content_width, content_height });
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}
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Rect GItemView::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 = item_index / m_visual_column_count;
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int visual_column_index = item_index % m_visual_column_count;
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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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Vector<int> GItemView::items_intersecting_rect(const Rect& rect) const
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{
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ASSERT(model());
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const auto& column_metadata = model()->column_metadata(model_column());
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const auto& font = column_metadata.font ? *column_metadata.font : this->font();
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Vector<int> item_indexes;
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for (int item_index = 0; item_index < item_count(); ++item_index) {
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Rect item_rect;
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Rect icon_rect;
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Rect text_rect;
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auto item_text = model()->data(model()->index(item_index, model_column()));
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get_item_rects(item_index, font, item_text, item_rect, icon_rect, text_rect);
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if (icon_rect.intersects(rect) || text_rect.intersects(rect))
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item_indexes.append(item_index);
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}
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return item_indexes;
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}
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int GItemView::item_at_event_position(const Point& position) const
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{
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ASSERT(model());
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// FIXME: Since all items are the same size, just compute the clicked item index
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// instead of iterating over everything.
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auto adjusted_position = position.translated(0, vertical_scrollbar().value());
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const auto& column_metadata = model()->column_metadata(model_column());
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const auto& font = column_metadata.font ? *column_metadata.font : this->font();
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for (int item_index = 0; item_index < item_count(); ++item_index) {
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Rect item_rect;
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Rect icon_rect;
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Rect text_rect;
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auto item_text = model()->data(model()->index(item_index, model_column()));
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get_item_rects(item_index, font, item_text, item_rect, icon_rect, text_rect);
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if (icon_rect.contains(adjusted_position) || text_rect.contains(adjusted_position))
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return item_index;
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}
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return -1;
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}
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void GItemView::mousedown_event(GMouseEvent& event)
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{
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int item_index = item_at_event_position(event.position());
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if (event.button() == GMouseButton::Left) {
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m_left_mousedown_position = event.position();
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if (item_index == -1) {
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if (event.modifiers() & Mod_Ctrl) {
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selection().for_each_index([&](auto& index) {
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m_rubber_band_remembered_selection.append(index);
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});
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} else {
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selection().clear();
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}
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m_rubber_banding = true;
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m_rubber_band_origin = event.position();
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m_rubber_band_current = event.position();
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} else {
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auto index = model()->index(item_index, m_model_column);
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if (event.modifiers() & Mod_Ctrl)
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selection().toggle(index);
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else if (selection().size() > 1)
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m_might_drag = true;
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else
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selection().set(index);
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}
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}
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GAbstractView::mousedown_event(event);
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}
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void GItemView::mouseup_event(GMouseEvent& event)
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{
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if (m_rubber_banding && event.button() == GMouseButton::Left) {
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m_rubber_banding = false;
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m_rubber_band_remembered_selection.clear();
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update();
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return;
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}
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int item_index = item_at_event_position(event.position());
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if (item_index >= 0) {
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auto index = model()->index(item_index, m_model_column);
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if ((selection().size() > 1) & m_might_drag) {
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selection().set(index);
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m_might_drag = false;
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}
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}
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GAbstractView::mouseup_event(event);
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}
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void GItemView::mousemove_event(GMouseEvent& event)
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{
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if (!model())
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return GAbstractView::mousemove_event(event);
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if (m_rubber_banding) {
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if (m_rubber_band_current != event.position()) {
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m_rubber_band_current = event.position();
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auto rubber_band_rect = Rect::from_two_points(m_rubber_band_origin, m_rubber_band_current);
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selection().clear();
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for (auto item_index : items_intersecting_rect(rubber_band_rect)) {
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selection().add(model()->index(item_index, model_column()));
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}
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if (event.modifiers() & Mod_Ctrl) {
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for (auto storeditem : m_rubber_band_remembered_selection) {
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selection().add(storeditem);
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}
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}
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update();
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return;
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}
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}
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if (event.buttons() & GMouseButton::Left && !selection().is_empty()) {
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auto diff = event.position() - m_left_mousedown_position;
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auto distance_travelled_squared = diff.x() * diff.x() + diff.y() * diff.y();
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constexpr int drag_distance_threshold = 5;
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if (distance_travelled_squared > (drag_distance_threshold)) {
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dbg() << "Initiate drag!";
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auto drag_operation = GDragOperation::construct();
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RefPtr<GraphicsBitmap> bitmap;
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StringBuilder text_builder;
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StringBuilder data_builder;
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int index_iterations = 0;
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selection().for_each_index([&](auto& index) {
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index_iterations++;
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auto text_data = model()->data(index);
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if (index_iterations == 0)
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text_builder.append(" ");
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text_builder.append(text_data.to_string());
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if (!(index_iterations == selection().size()))
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text_builder.append(", ");
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auto drag_data = model()->data(index, GModel::Role::DragData);
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data_builder.append(drag_data.to_string());
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data_builder.append('\n');
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if (!bitmap) {
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GVariant icon_data = model()->data(index, GModel::Role::Icon);
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if (icon_data.is_icon())
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bitmap = icon_data.as_icon().bitmap_for_size(32);
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}
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});
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drag_operation->set_text(text_builder.to_string());
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drag_operation->set_bitmap(bitmap);
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drag_operation->set_data("url-list", data_builder.to_string());
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auto outcome = drag_operation->exec();
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switch (outcome) {
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case GDragOperation::Outcome::Accepted:
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dbg() << "Drag was accepted!";
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break;
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case GDragOperation::Outcome::Cancelled:
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dbg() << "Drag was cancelled!";
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break;
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default:
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ASSERT_NOT_REACHED();
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break;
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}
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}
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}
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GAbstractView::mousemove_event(event);
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}
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void GItemView::context_menu_event(GContextMenuEvent& event)
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{
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if (!model())
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return;
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auto item_index = item_at_event_position(event.position());
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GModelIndex index;
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if (item_index != -1) {
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index = model()->index(item_index, m_model_column);
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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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GAbstractView::context_menu_event(event);
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}
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void GItemView::doubleclick_event(GMouseEvent& event)
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{
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if (!model())
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return;
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if (event.button() == GMouseButton::Left) {
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mousedown_event(event);
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activate_selected();
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}
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}
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void GItemView::get_item_rects(int item_index, const Font& font, const GVariant& item_text, Rect& item_rect, Rect& icon_rect, Rect& text_rect) const
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{
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item_rect = this->item_rect(item_index);
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icon_rect = { 0, 0, 32, 32 };
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icon_rect.center_within(item_rect);
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icon_rect.move_by(0, -font.glyph_height() - 6);
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text_rect = { 0, icon_rect.bottom() + 6 + 1, font.width(item_text.to_string()), font.glyph_height() };
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text_rect.center_horizontally_within(item_rect);
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text_rect.inflate(6, 4);
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text_rect.intersect(item_rect);
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}
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void GItemView::second_paint_event(GPaintEvent& event)
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{
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if (!m_rubber_banding)
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return;
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GPainter painter(*this);
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painter.add_clip_rect(event.rect());
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auto rubber_band_rect = Rect::from_two_points(m_rubber_band_origin, m_rubber_band_current);
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painter.fill_rect(rubber_band_rect, parent_widget()->palette().rubber_band_fill());
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painter.draw_rect(rubber_band_rect, parent_widget()->palette().rubber_band_border());
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}
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void GItemView::paint_event(GPaintEvent& event)
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{
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Color widget_background_color = palette().color(background_role());
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GFrame::paint_event(event);
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GPainter painter(*this);
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painter.add_clip_rect(widget_inner_rect());
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painter.add_clip_rect(event.rect());
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painter.fill_rect(event.rect(), widget_background_color);
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painter.translate(-horizontal_scrollbar().value(), -vertical_scrollbar().value());
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auto column_metadata = model()->column_metadata(m_model_column);
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const Font& font = column_metadata.font ? *column_metadata.font : this->font();
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for (int item_index = 0; item_index < model()->row_count(); ++item_index) {
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auto model_index = model()->index(item_index, m_model_column);
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bool is_selected_item = selection().contains(model_index);
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Color background_color;
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if (is_selected_item) {
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background_color = is_focused() ? palette().selection() : Color::from_rgb(0x606060);
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} else {
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background_color = widget_background_color;
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}
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auto icon = model()->data(model_index, GModel::Role::Icon);
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auto item_text = model()->data(model_index, GModel::Role::Display);
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Rect item_rect;
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Rect icon_rect;
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Rect text_rect;
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get_item_rects(item_index, font, item_text, item_rect, icon_rect, text_rect);
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if (icon.is_icon()) {
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if (auto bitmap = icon.as_icon().bitmap_for_size(icon_rect.width()))
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painter.draw_scaled_bitmap(icon_rect, *bitmap, bitmap->rect());
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}
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Color text_color;
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if (is_selected_item)
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text_color = palette().selection_text();
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else
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text_color = model()->data(model_index, GModel::Role::ForegroundColor).to_color(palette().color(foreground_role()));
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painter.fill_rect(text_rect, background_color);
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painter.draw_text(text_rect, item_text.to_string(), font, TextAlignment::Center, text_color, TextElision::Right);
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};
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}
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int GItemView::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 GItemView::keydown_event(GKeyEvent& event)
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{
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if (!model())
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return;
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if (!m_visual_row_count || !m_visual_column_count)
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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_Home) {
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auto new_index = model.index(0, 0);
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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_End) {
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auto new_index = model.index(model.row_count() - 1, 0);
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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_Up) {
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GModelIndex 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() - m_visual_column_count, old_index.column());
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} else {
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new_index = model.index(0, 0);
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}
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if (model.is_valid(new_index)) {
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selection().set(new_index);
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scroll_into_view(new_index, Orientation::Vertical);
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update();
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}
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return;
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}
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if (event.key() == KeyCode::Key_Down) {
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GModelIndex 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() + m_visual_column_count, old_index.column());
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} else {
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new_index = model.index(0, 0);
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}
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if (model.is_valid(new_index)) {
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selection().set(new_index);
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scroll_into_view(new_index, Orientation::Vertical);
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update();
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}
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return;
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}
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if (event.key() == KeyCode::Key_Left) {
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GModelIndex new_index;
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if (!selection().is_empty()) {
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auto old_index = selection().first();
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new_index = model.index(old_index.row() - 1, old_index.column());
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} else {
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new_index = model.index(0, 0);
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}
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if (model.is_valid(new_index)) {
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selection().set(new_index);
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scroll_into_view(new_index, Orientation::Vertical);
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update();
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}
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return;
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}
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if (event.key() == KeyCode::Key_Right) {
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GModelIndex new_index;
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if (!selection().is_empty()) {
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auto old_index = selection().first();
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new_index = model.index(old_index.row() + 1, old_index.column());
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} else {
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new_index = model.index(0, 0);
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}
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if (model.is_valid(new_index)) {
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selection().set(new_index);
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scroll_into_view(new_index, Orientation::Vertical);
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update();
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}
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return;
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}
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if (event.key() == KeyCode::Key_PageUp) {
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int items_per_page = (visible_content_rect().height() / effective_item_size().height()) * m_visual_column_count;
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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() / effective_item_size().height()) * m_visual_column_count;
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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 GWidget::keydown_event(event);
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|
}
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