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ee3a73ddbb
This makes it much clearer what this cast actually does: it will VERIFY that the thing we're casting is a T (using is<T>()).
77 lines
1.9 KiB
C++
77 lines
1.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGUI/BoxLayout.h>
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#include <LibGUI/StackWidget.h>
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#include <LibGUI/Window.h>
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REGISTER_WIDGET(GUI, StackWidget);
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namespace GUI {
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StackWidget::StackWidget()
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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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bool active_widget_had_focus = m_active_widget && m_active_widget->has_focus_within();
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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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if (active_widget_had_focus)
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m_active_widget->set_focus(true);
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m_active_widget->set_visible(true);
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}
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set_focus_proxy(m_active_widget);
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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() || !is<Widget>(*event.child()))
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return Widget::child_event(event);
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auto& child = verify_cast<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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