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LibGUI: Add a GStackWidget for many widgets sharing a single location.

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Call set_active_widget(GWidget*) to put a new widget on top.
This commit is contained in:
Andreas Kling 2019-03-15 16:12:06 +01:00
parent ab92252ee6
commit 497300c492
10 changed files with 157 additions and 5 deletions
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62
LibGUI/GStackWidget.cpp Normal file
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#include <LibGUI/GStackWidget.h>
#include <LibGUI/GBoxLayout.h>
GStackWidget::GStackWidget(GWidget* parent)
: GWidget(parent)
{
set_fill_with_background_color(true);
set_background_color(Color::Red);
}
GStackWidget::~GStackWidget()
{
}
void GStackWidget::set_active_widget(GWidget* widget)
{
dbgprintf("XXX: GStackWidget: set_active_widget %p\n", widget);
if (widget == m_active_widget)
return;
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());
m_active_widget->set_visible(true);
}
}
void GStackWidget::resize_event(GResizeEvent& event)
{
if (!m_active_widget)
return;
m_active_widget->set_relative_rect({ { }, event.size() });
}
void GStackWidget::child_event(GChildEvent& event)
{
if (!event.child() || !event.child()->is_widget())
return;
auto& child = static_cast<GWidget&>(*event.child());
if (event.type() == GEvent::ChildAdded) {
dbgprintf("XXX: GStackWidget: did_add_child %p\n", &child);
if (!m_active_widget) {
set_active_widget(&child);
} else {
child.set_visible(false);
}
} else if (event.type() == GEvent::ChildRemoved) {
dbgprintf("XXX: GStackWidget: did_remove_child %p\n", &child);
if (m_active_widget == &child) {
GWidget* new_active_widget = nullptr;
for (auto* new_child : children()) {
if (new_child->is_widget()) {
new_active_widget = static_cast<GWidget*>(new_child);
break;
}
}
set_active_widget(new_active_widget);
}
}
}