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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qquickitemgroup_p.h"
#include <QtQuick/private/qquickimplicitsizeitem_p_p.h>
QT_BEGIN_NAMESPACE
QQuickItemGroup::QQuickItemGroup(QQuickItem *parent)
: QQuickImplicitSizeItem(*(new QQuickImplicitSizeItemPrivate), parent)
{
}
QQuickItemGroup::~QQuickItemGroup()
{
const auto children = childItems();
for (QQuickItem *child : children)
unwatch(child);
}
void QQuickItemGroup::watch(QQuickItem *item)
{
QQuickItemPrivate::get(item)->addItemChangeListener(this, QQuickItemPrivate::ImplicitWidth | QQuickItemPrivate::ImplicitHeight);
}
void QQuickItemGroup::unwatch(QQuickItem *item)
{
QQuickItemPrivate::get(item)->removeItemChangeListener(this, QQuickItemPrivate::ImplicitWidth | QQuickItemPrivate::ImplicitHeight);
}
QSizeF QQuickItemGroup::calculateImplicitSize() const
{
qreal width = 0;
qreal height = 0;
const auto children = childItems();
for (QQuickItem *child : children) {
width = qMax(width, child->implicitWidth());
height = qMax(height, child->implicitHeight());
}
return QSizeF(width, height);
}
void QQuickItemGroup::updateImplicitSize()
{
QSizeF size = calculateImplicitSize();
setImplicitSize(size.width(), size.height());
}
void QQuickItemGroup::itemChange(ItemChange change, const ItemChangeData &data)
{
QQuickImplicitSizeItem::itemChange(change, data);
switch (change) {
case ItemChildAddedChange:
watch(data.item);
data.item->setSize(QSizeF(width(), height()));
updateImplicitSize();
break;
case ItemChildRemovedChange:
unwatch(data.item);
updateImplicitSize();
break;
default:
break;
}
}
void QQuickItemGroup::geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry)
{
QQuickImplicitSizeItem::geometryChange(newGeometry, oldGeometry);
if (newGeometry.size() != oldGeometry.size()) {
const auto children = childItems();
for (QQuickItem *child : children)
child->setSize(newGeometry.size());
}
}
void QQuickItemGroup::itemImplicitWidthChanged(QQuickItem *)
{
setImplicitWidth(calculateImplicitSize().width());
}
void QQuickItemGroup::itemImplicitHeightChanged(QQuickItem *)
{
setImplicitHeight(calculateImplicitSize().height());
}
QT_END_NAMESPACE
#include "moc_qquickitemgroup_p.cpp"
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