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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibGUI/BoxLayout.h>
#include <LibGUI/StackWidget.h>
#include <LibGUI/Window.h>
namespace GUI {
StackWidget::StackWidget()
{
}
StackWidget::~StackWidget()
{
}
void StackWidget::set_active_widget(Widget* widget)
{
if (widget == m_active_widget)
return;
bool active_widget_had_focus = m_active_widget && m_active_widget->has_focus_within();
if (m_active_widget)
m_active_widget->set_visible(false);
m_active_widget = widget;
if (m_active_widget) {
m_active_widget->set_relative_rect(rect());
if (active_widget_had_focus)
m_active_widget->set_focus(true);
m_active_widget->set_visible(true);
}
set_focus_proxy(m_active_widget);
if (on_active_widget_change)
on_active_widget_change(m_active_widget);
}
void StackWidget::resize_event(ResizeEvent& event)
{
if (!m_active_widget)
return;
m_active_widget->set_relative_rect({ {}, event.size() });
}
void StackWidget::child_event(Core::ChildEvent& event)
{
if (!event.child() || !is<Widget>(*event.child()))
return Widget::child_event(event);
auto& child = downcast<Widget>(*event.child());
if (event.type() == Event::ChildAdded) {
if (!m_active_widget)
set_active_widget(&child);
else if (m_active_widget != &child)
child.set_visible(false);
} else if (event.type() == Event::ChildRemoved) {
if (m_active_widget == &child) {
Widget* new_active_widget = nullptr;
for_each_child_widget([&](auto& new_child) {
new_active_widget = &new_child;
return IterationDecision::Break;
});
set_active_widget(new_active_widget);
}
}
Widget::child_event(event);
}
}
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