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87 lines
2.9 KiB
C++
87 lines
2.9 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 <LibGUI/BoxLayout.h>
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#include <LibGUI/StackWidget.h>
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namespace GUI {
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StackWidget::StackWidget(Widget* parent)
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: Widget(parent)
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{
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}
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StackWidget::~StackWidget()
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{
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}
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void StackWidget::set_active_widget(Widget* widget)
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{
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if (widget == m_active_widget)
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return;
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if (m_active_widget)
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m_active_widget->set_visible(false);
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m_active_widget = widget;
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if (m_active_widget) {
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m_active_widget->set_relative_rect(rect());
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m_active_widget->set_visible(true);
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}
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if (on_active_widget_change)
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on_active_widget_change(m_active_widget);
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}
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void StackWidget::resize_event(ResizeEvent& event)
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{
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if (!m_active_widget)
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return;
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m_active_widget->set_relative_rect({ {}, event.size() });
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}
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void StackWidget::child_event(Core::ChildEvent& event)
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{
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if (!event.child() || !Core::is<Widget>(*event.child()))
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return Widget::child_event(event);
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auto& child = Core::to<Widget>(*event.child());
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if (event.type() == Event::ChildAdded) {
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if (!m_active_widget)
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set_active_widget(&child);
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else if (m_active_widget != &child)
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child.set_visible(false);
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} else if (event.type() == Event::ChildRemoved) {
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if (m_active_widget == &child) {
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Widget* new_active_widget = nullptr;
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for_each_child_widget([&](auto& new_child) {
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new_active_widget = &new_child;
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return IterationDecision::Break;
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});
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set_active_widget(new_active_widget);
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}
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}
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Widget::child_event(event);
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}
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}
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