/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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****************************************************************************/

#ifndef QMDIAREA_CONTAINER_H
#define QMDIAREA_CONTAINER_H

#include <QtDesigner/container.h>


#include <qdesigner_propertysheet_p.h>
#include <extensionfactory_p.h>

#include <QtWidgets/qmdiarea.h>

QT_BEGIN_NAMESPACE

namespace qdesigner_internal {

// Container for QMdiArea
class QMdiAreaContainer: public QObject, public QDesignerContainerExtension
{
    Q_OBJECT
    Q_INTERFACES(QDesignerContainerExtension)
public:
    explicit QMdiAreaContainer(QMdiArea *widget, QObject *parent = nullptr);

    int count() const override;
    QWidget *widget(int index) const override;
    int currentIndex() const override;
    void setCurrentIndex(int index) override;
    bool canAddWidget() const override { return true; }
    void addWidget(QWidget *widget) override;
    void insertWidget(int index, QWidget *widget) override;
    bool canRemove(int) const override { return true; }
    void remove(int index) override;

    // Semismart positioning of a new MDI child after cascading
    static void positionNewMdiChild(const QWidget *area, QWidget *mdiChild);

private:
    QMdiArea *m_mdiArea;
};

// PropertySheet for QMdiArea: Fakes window title and name.

class QMdiAreaPropertySheet: public QDesignerPropertySheet
{
    Q_OBJECT
    Q_INTERFACES(QDesignerPropertySheetExtension)
public:
    explicit QMdiAreaPropertySheet(QWidget *mdiArea, QObject *parent = nullptr);

    void setProperty(int index, const QVariant &value) override;
    bool reset(int index) override;
    bool isEnabled(int index) const override;
    bool isChanged(int index) const override;
    QVariant property(int index) const override;

    // Check whether the property is to be saved. Returns false for the page
    // properties (as the property sheet has no concept of 'stored')
    static bool checkProperty(const QString &propertyName);

private:
    const QString m_windowTitleProperty;
    QWidget *currentWindow() const;
    QDesignerPropertySheetExtension *currentWindowSheet() const;

    enum MdiAreaProperty { MdiAreaSubWindowName, MdiAreaSubWindowTitle, MdiAreaNone };
    static MdiAreaProperty mdiAreaProperty(const QString &name);
};

// Factories

using QMdiAreaContainerFactory = ExtensionFactory<QDesignerContainerExtension,  QMdiArea,  QMdiAreaContainer>;
using QMdiAreaPropertySheetFactory = QDesignerPropertySheetFactory<QMdiArea, QMdiAreaPropertySheet>;
}  // namespace qdesigner_internal

QT_END_NAMESPACE

#endif // QMDIAREA_CONTAINER_H