// Copyright (C) 2016 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

#ifndef QMDISUBWINDOW_H
#define QMDISUBWINDOW_H

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

QT_REQUIRE_CONFIG(mdiarea);

QT_BEGIN_NAMESPACE

class QMenu;
class QMdiArea;

namespace QMdi { class ControlContainer; }
class QMdiSubWindowPrivate;
class Q_WIDGETS_EXPORT QMdiSubWindow : public QWidget
{
    Q_OBJECT
    Q_PROPERTY(int keyboardSingleStep READ keyboardSingleStep WRITE setKeyboardSingleStep)
    Q_PROPERTY(int keyboardPageStep READ keyboardPageStep WRITE setKeyboardPageStep)
public:
    enum SubWindowOption {
        AllowOutsideAreaHorizontally = 0x1, // internal
        AllowOutsideAreaVertically = 0x2, // internal
        RubberBandResize = 0x4,
        RubberBandMove = 0x8
    };
    Q_DECLARE_FLAGS(SubWindowOptions, SubWindowOption)

    QMdiSubWindow(QWidget *parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags());
    ~QMdiSubWindow();

    QSize sizeHint() const override;
    QSize minimumSizeHint() const override;

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

    QWidget *maximizedButtonsWidget() const; // internal
    QWidget *maximizedSystemMenuIconWidget() const; // internal

    bool isShaded() const;

    void setOption(SubWindowOption option, bool on = true);
    bool testOption(SubWindowOption) const;

    void setKeyboardSingleStep(int step);
    int keyboardSingleStep() const;

    void setKeyboardPageStep(int step);
    int keyboardPageStep() const;

#if QT_CONFIG(menu)
    void setSystemMenu(QMenu *systemMenu);
    QMenu *systemMenu() const;
#endif

    QMdiArea *mdiArea() const;

Q_SIGNALS:
    void windowStateChanged(Qt::WindowStates oldState, Qt::WindowStates newState);
    void aboutToActivate();

public Q_SLOTS:
#if QT_CONFIG(menu)
    void showSystemMenu();
#endif
    void showShaded();

protected:
    bool eventFilter(QObject *object, QEvent *event) override;
    bool event(QEvent *event) override;
    void showEvent(QShowEvent *showEvent) override;
    void hideEvent(QHideEvent *hideEvent) override;
    void changeEvent(QEvent *changeEvent) override;
    void closeEvent(QCloseEvent *closeEvent) override;
    void leaveEvent(QEvent *leaveEvent) override;
    void resizeEvent(QResizeEvent *resizeEvent) override;
    void timerEvent(QTimerEvent *timerEvent) override;
    void moveEvent(QMoveEvent *moveEvent) override;
    void paintEvent(QPaintEvent *paintEvent) override;
    void mousePressEvent(QMouseEvent *mouseEvent) override;
    void mouseDoubleClickEvent(QMouseEvent *mouseEvent) override;
    void mouseReleaseEvent(QMouseEvent *mouseEvent) override;
    void mouseMoveEvent(QMouseEvent *mouseEvent) override;
    void keyPressEvent(QKeyEvent *keyEvent) override;
#ifndef QT_NO_CONTEXTMENU
    void contextMenuEvent(QContextMenuEvent *contextMenuEvent) override;
#endif
    void focusInEvent(QFocusEvent *focusInEvent) override;
    void focusOutEvent(QFocusEvent *focusOutEvent) override;
    void childEvent(QChildEvent *childEvent) override;

private:
    Q_DISABLE_COPY(QMdiSubWindow)
    Q_DECLARE_PRIVATE(QMdiSubWindow)
    Q_PRIVATE_SLOT(d_func(), void _q_updateStaysOnTopHint())
    Q_PRIVATE_SLOT(d_func(), void _q_enterInteractiveMode())
    Q_PRIVATE_SLOT(d_func(), void _q_processFocusChanged(QWidget *, QWidget *))
    friend class QMdiAreaPrivate;
    friend class QMdiArea;
#if QT_CONFIG(tabbar)
    friend class QMdiAreaTabBar;
#endif
    friend class QMdi::ControlContainer;
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QMdiSubWindow::SubWindowOptions)

QT_END_NAMESPACE

#endif // QMDISUBWINDOW_H