mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-21 18:37:58 +03:00
6a78db07f1
Adds a new highlighting effect to the actively selected row in ComboBox ListView. ComboBoxEditor can now be controlled with page up, page down, and the up and down arrow keys. ESC and loss of focus now cause comboboxes to close. Now activates on mouseup as well as return.
404 lines
11 KiB
C++
404 lines
11 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/AbstractView.h>
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#include <LibGUI/DragOperation.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 <LibGUI/TextBox.h>
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namespace GUI {
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AbstractView::AbstractView()
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: m_selection(*this)
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{
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}
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AbstractView::~AbstractView()
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{
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}
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void AbstractView::set_model(RefPtr<Model> model)
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{
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if (model == m_model)
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return;
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if (m_model)
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m_model->unregister_view({}, *this);
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m_model = move(model);
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if (m_model)
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m_model->register_view({}, *this);
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did_update_model(GUI::Model::InvalidateAllIndexes);
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scroll_to_top();
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}
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void AbstractView::did_update_model(unsigned flags)
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{
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// FIXME: It's unfortunate that we lose so much view state when the model updates in any way.
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stop_editing();
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m_edit_index = {};
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m_hovered_index = {};
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if (!model() || (flags & GUI::Model::InvalidateAllIndexes)) {
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clear_selection();
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} else {
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selection().remove_matching([this](auto& index) { return !model()->is_valid(index); });
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}
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}
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void AbstractView::clear_selection()
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{
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m_selection.clear();
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}
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void AbstractView::set_selection(const ModelIndex& new_index)
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{
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m_selection.set(new_index);
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}
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void AbstractView::add_selection(const ModelIndex& new_index)
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{
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m_selection.add(new_index);
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}
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void AbstractView::remove_selection(const ModelIndex& new_index)
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{
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m_selection.remove(new_index);
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}
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void AbstractView::toggle_selection(const ModelIndex& new_index)
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{
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m_selection.toggle(new_index);
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}
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void AbstractView::did_update_selection()
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{
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if (!model() || selection().first() != m_edit_index)
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stop_editing();
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if (model() && on_selection && selection().first().is_valid())
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on_selection(selection().first());
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}
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void AbstractView::did_scroll()
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{
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update_edit_widget_position();
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}
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void AbstractView::update_edit_widget_position()
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{
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if (!m_edit_widget)
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return;
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m_edit_widget->set_relative_rect(m_edit_widget_content_rect.translated(-horizontal_scrollbar().value(), -vertical_scrollbar().value()));
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}
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void AbstractView::begin_editing(const ModelIndex& index)
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{
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ASSERT(is_editable());
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ASSERT(model());
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if (m_edit_index == index)
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return;
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if (!model()->is_editable(index))
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return;
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if (m_edit_widget) {
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remove_child(*m_edit_widget);
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m_edit_widget = nullptr;
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}
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m_edit_index = index;
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ASSERT(aid_create_editing_delegate);
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m_editing_delegate = aid_create_editing_delegate(index);
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m_editing_delegate->bind(*model(), index);
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m_editing_delegate->set_value(model()->data(index, Model::Role::Display));
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m_edit_widget = m_editing_delegate->widget();
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add_child(*m_edit_widget);
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m_edit_widget->move_to_back();
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m_edit_widget_content_rect = content_rect(index).translated(frame_thickness(), frame_thickness());
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update_edit_widget_position();
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m_edit_widget->set_focus(true);
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m_editing_delegate->will_begin_editing();
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m_editing_delegate->on_commit = [this] {
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ASSERT(model());
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model()->set_data(m_edit_index, m_editing_delegate->value());
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stop_editing();
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};
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}
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void AbstractView::stop_editing()
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{
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m_edit_index = {};
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if (m_edit_widget) {
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remove_child(*m_edit_widget);
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m_edit_widget = nullptr;
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}
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}
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void AbstractView::activate(const ModelIndex& index)
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{
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if (on_activation)
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on_activation(index);
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}
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void AbstractView::activate_selected()
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{
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if (!on_activation)
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return;
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selection().for_each_index([this](auto& index) {
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on_activation(index);
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});
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}
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void AbstractView::notify_selection_changed(Badge<ModelSelection>)
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{
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did_update_selection();
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if (on_selection_change)
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on_selection_change();
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update();
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}
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NonnullRefPtr<Gfx::Font> AbstractView::font_for_index(const ModelIndex& index) const
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{
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if (!model())
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return font();
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auto font_data = model()->data(index, Model::Role::Font);
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if (font_data.is_font())
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return font_data.as_font();
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return font();
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}
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void AbstractView::mousedown_event(MouseEvent& event)
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{
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ScrollableWidget::mousedown_event(event);
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if (!model())
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return;
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if (event.button() == MouseButton::Left)
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m_left_mousedown_position = event.position();
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auto index = index_at_event_position(event.position());
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m_might_drag = false;
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if (!index.is_valid()) {
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clear_selection();
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} else if (event.modifiers() & Mod_Ctrl) {
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toggle_selection(index);
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} else if (event.button() == MouseButton::Left && m_selection.contains(index) && !m_model->drag_data_type().is_null()) {
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// We might be starting a drag, so don't throw away other selected items yet.
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m_might_drag = true;
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} else {
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set_selection(index);
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}
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update();
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}
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void AbstractView::set_hovered_index(const ModelIndex& index)
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{
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if (m_hovered_index == index)
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return;
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m_hovered_index = index;
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if (m_hovered_index.is_valid())
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m_last_valid_hovered_index = m_hovered_index;
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update();
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}
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void AbstractView::set_last_valid_hovered_index(const ModelIndex& index)
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{
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if (m_last_valid_hovered_index == index)
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return;
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m_last_valid_hovered_index = index;
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update();
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}
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void AbstractView::leave_event(Core::Event& event)
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{
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ScrollableWidget::leave_event(event);
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set_hovered_index({});
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}
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void AbstractView::mousemove_event(MouseEvent& event)
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{
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if (!model())
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return ScrollableWidget::mousemove_event(event);
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auto hovered_index = index_at_event_position(event.position());
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set_hovered_index(hovered_index);
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if (!m_might_drag)
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return ScrollableWidget::mousemove_event(event);
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if (!(event.buttons() & MouseButton::Left) || m_selection.is_empty()) {
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m_might_drag = false;
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return ScrollableWidget::mousemove_event(event);
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}
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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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return ScrollableWidget::mousemove_event(event);
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auto data_type = m_model->drag_data_type();
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ASSERT(!data_type.is_null());
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dbg() << "Initiate drag!";
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auto drag_operation = DragOperation::construct();
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RefPtr<Gfx::Bitmap> bitmap;
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StringBuilder text_builder;
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StringBuilder data_builder;
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bool first = true;
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m_selection.for_each_index([&](auto& index) {
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auto text_data = m_model->data(index);
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if (!first)
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text_builder.append(", ");
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text_builder.append(text_data.to_string());
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auto drag_data = m_model->data(index, Model::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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first = false;
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if (!bitmap) {
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Variant icon_data = model()->data(index, Model::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(data_type, data_builder.to_string());
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auto outcome = drag_operation->exec();
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switch (outcome) {
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case DragOperation::Outcome::Accepted:
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dbg() << "Drag was accepted!";
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break;
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case DragOperation::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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void AbstractView::mouseup_event(MouseEvent& event)
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{
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ScrollableWidget::mouseup_event(event);
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if (!model())
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return;
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if (m_might_drag) {
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// We were unsure about unselecting items other than the current one
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// in mousedown_event(), because we could be seeing a start of a drag.
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// Since we're here, it was not that; so fix up the selection now.
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auto index = index_at_event_position(event.position());
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if (index.is_valid())
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set_selection(index);
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else
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clear_selection();
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m_might_drag = false;
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update();
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}
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if (activates_on_selection())
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activate_selected();
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}
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void AbstractView::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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return;
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m_might_drag = false;
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auto index = index_at_event_position(event.position());
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if (!index.is_valid())
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clear_selection();
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else if (!m_selection.contains(index))
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set_selection(index);
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activate_selected();
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}
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void AbstractView::context_menu_event(ContextMenuEvent& event)
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{
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if (!model())
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return;
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auto index = index_at_event_position(event.position());
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if (index.is_valid())
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add_selection(index);
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else
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clear_selection();
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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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void AbstractView::drop_event(DropEvent& event)
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{
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event.accept();
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if (!model())
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return;
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auto index = index_at_event_position(event.position());
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if (on_drop)
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on_drop(index, event);
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}
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void AbstractView::set_multi_select(bool multi_select)
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{
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if (m_multi_select == multi_select)
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return;
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m_multi_select = multi_select;
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if (!multi_select && m_selection.size() > 1) {
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auto first_selected = m_selection.first();
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m_selection.clear();
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m_selection.set(first_selected);
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}
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}
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}
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