default_layoutdecoration.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
#include "default_layoutdecoration.h"
#include "qlayout_widget_p.h"
 
#include <layoutinfo_p.h>
 
#include <QtDesigner/abstractmetadatabase.h>
#include <QtDesigner/abstractformwindow.h>
#include <QtDesigner/abstractformeditor.h>
 
QT_BEGIN_NAMESPACE
 
namespace qdesigner_internal {
 
// ---- QDesignerLayoutDecorationFactory ----
QDesignerLayoutDecorationFactory::QDesignerLayoutDecorationFactory(QExtensionManager *parent)
    : QExtensionFactory(parent)
{
}
 
QObject *QDesignerLayoutDecorationFactory::createExtension(QObject *object, const QString &iid, QObject *parent) const
{
    if (!object->isWidgetType() || iid != Q_TYPEID(QDesignerLayoutDecorationExtension))
        return nullptr;
 
    QWidget *widget = qobject_cast<QWidget*>(object);
 
    if (const QLayoutWidget *layoutWidget = qobject_cast<const QLayoutWidget*>(widget))
        return QLayoutSupport::createLayoutSupport(layoutWidget->formWindow(), widget, parent);
 
    if (QDesignerFormWindowInterface *fw = QDesignerFormWindowInterface::findFormWindow(widget))
        if (LayoutInfo::managedLayout(fw->core(), widget))
            return QLayoutSupport::createLayoutSupport(fw, widget, parent);
 
    return nullptr;
}
}
 
QT_END_NAMESPACE