/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWidgets module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QDYNAMICDOCKWIDGET_H
#define QDYNAMICDOCKWIDGET_H

#include <QtWidgets/qtwidgetsglobal.h>
#include <QtWidgets/qwidget.h>

QT_REQUIRE_CONFIG(dockwidget);

QT_BEGIN_NAMESPACE

class QDockAreaLayout;
class QDockWidgetPrivate;
class QMainWindow;
class QStyleOptionDockWidget;

class Q_WIDGETS_EXPORT QDockWidget : public QWidget
{
    Q_OBJECT

    Q_PROPERTY(bool floating READ isFloating WRITE setFloating)
    Q_PROPERTY(DockWidgetFeatures features READ features WRITE setFeatures NOTIFY featuresChanged)
    Q_PROPERTY(Qt::DockWidgetAreas allowedAreas READ allowedAreas
               WRITE setAllowedAreas NOTIFY allowedAreasChanged)
    Q_PROPERTY(QString windowTitle READ windowTitle WRITE setWindowTitle DESIGNABLE true)

public:
    explicit QDockWidget(const QString &title, QWidget *parent = nullptr,
                         Qt::WindowFlags flags = Qt::WindowFlags());
    explicit QDockWidget(QWidget *parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags());
    ~QDockWidget();

    QWidget *widget() const;
    void setWidget(QWidget *widget);

    enum DockWidgetFeature {
        DockWidgetClosable    = 0x01,
        DockWidgetMovable     = 0x02,
        DockWidgetFloatable   = 0x04,
        DockWidgetVerticalTitleBar = 0x08,

        DockWidgetFeatureMask = 0x0f,
#if QT_DEPRECATED_SINCE(5, 15)
        AllDockWidgetFeatures Q_DECL_ENUMERATOR_DEPRECATED =
            DockWidgetClosable|DockWidgetMovable|DockWidgetFloatable, // ### Qt 6: remove
#endif
        NoDockWidgetFeatures  = 0x00,

        Reserved              = 0xff
    };
    Q_DECLARE_FLAGS(DockWidgetFeatures, DockWidgetFeature)
    Q_FLAG(DockWidgetFeatures)

    void setFeatures(DockWidgetFeatures features);
    DockWidgetFeatures features() const;

    void setFloating(bool floating);
    inline bool isFloating() const { return isWindow(); }

    void setAllowedAreas(Qt::DockWidgetAreas areas);
    Qt::DockWidgetAreas allowedAreas() const;

    void setTitleBarWidget(QWidget *widget);
    QWidget *titleBarWidget() const;

    inline bool isAreaAllowed(Qt::DockWidgetArea area) const
    { return (allowedAreas() & area) == area; }

#ifndef QT_NO_ACTION
    QAction *toggleViewAction() const;
#endif

Q_SIGNALS:
    void featuresChanged(QDockWidget::DockWidgetFeatures features);
    void topLevelChanged(bool topLevel);
    void allowedAreasChanged(Qt::DockWidgetAreas allowedAreas);
    void visibilityChanged(bool visible);
    void dockLocationChanged(Qt::DockWidgetArea area);

protected:
    void changeEvent(QEvent *event) override;
    void closeEvent(QCloseEvent *event) override;
    void paintEvent(QPaintEvent *event) override;
    bool event(QEvent *event) override;
    void initStyleOption(QStyleOptionDockWidget *option) const;

private:
    Q_DECLARE_PRIVATE(QDockWidget)
    Q_DISABLE_COPY(QDockWidget)
    Q_PRIVATE_SLOT(d_func(), void _q_toggleView(bool))
    Q_PRIVATE_SLOT(d_func(), void _q_toggleTopLevel())
    friend class QDockAreaLayout;
    friend class QDockWidgetItem;
    friend class QMainWindowLayout;
    friend class QDockWidgetLayout;
    friend class QDockAreaLayoutInfo;
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QDockWidget::DockWidgetFeatures)

QT_END_NAMESPACE

#endif // QDYNAMICDOCKWIDGET_H
