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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGUI/BoxLayout.h>
#include <LibGUI/StackWidget.h>
#include <LibGUI/Window.h>
REGISTER_WIDGET(GUI, StackWidget);
namespace GUI {
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 = verify_cast<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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