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****************************************************************************/

#ifndef QMDISUBWINDOW_P_H

#define QMDISUBWINDOW_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include "qmdisubwindow.h"

#ifndef QT_NO_MDIAREA

#include <QStyle>

#include <QStyleOptionTitleBar>

#include <QMenuBar>

#include <QSizeGrip>

#include <QPointer>

#include <QDebug>

#include <private/qwidget_p.h>

QT_BEGIN_NAMESPACE

class QVBoxLayout;

class QMouseEvent;

namespace QMdi {

template<typename T>

class ControlElement : public T

{

public:

    ControlElement(QMdiSubWindow *child) : T(child, 0)

    {

        Q_ASSERT(child);

        mdiChild = child;

    }

    void *qt_metacast(const char *classname)

    {

        if (classname && strcmp(classname, "ControlElement") == 0)

            return this;

        return 0;

    }

    QPointer<QMdiSubWindow> mdiChild;

};

class ControlContainer : public QObject

{

public:

    ControlContainer(QMdiSubWindow *mdiChild);

    ~ControlContainer();

#ifndef QT_NO_MENUBAR

    void showButtonsInMenuBar(QMenuBar *menuBar);

    void removeButtonsFromMenuBar(QMenuBar *menuBar = 0);

    QMenuBar *menuBar() const { return m_menuBar; }

#endif

    void updateWindowIcon(const QIcon &windowIcon);

    QWidget *controllerWidget() const { return m_controllerWidget; }

    QWidget *systemMenuLabel() const { return m_menuLabel; }

private:

    QPointer<QWidget> previousLeft;

    QPointer<QWidget> previousRight;

#ifndef QT_NO_MENUBAR

    QPointer<QMenuBar> m_menuBar;

#endif

    QPointer<QWidget> m_controllerWidget;

    QPointer<QWidget> m_menuLabel;

    QPointer<QMdiSubWindow> mdiChild;

};

} // namespace QMdi

class QMdiSubWindowPrivate : public QWidgetPrivate

{

    Q_DECLARE_PUBLIC(QMdiSubWindow)

public:

    // Enums and typedefs.

    enum Operation {

        None,

        Move,

        TopResize,

        BottomResize,

        LeftResize,

        RightResize,

        TopLeftResize,

        TopRightResize,

        BottomLeftResize,

        BottomRightResize

    };

    enum ChangeFlag {

        HMove = 0x01,

        VMove = 0x02,

        HResize = 0x04,

        VResize = 0x08,

        HResizeReverse = 0x10,

        VResizeReverse = 0x20

    };

    enum WindowStateAction {

        RestoreAction,

        MoveAction,

        ResizeAction,

        MinimizeAction,

        MaximizeAction,

        StayOnTopAction,

        CloseAction,

        /* Add new states _above_ this line! */

        NumWindowStateActions

    };

    struct OperationInfo {

        uint changeFlags;

        Qt::CursorShape cursorShape;

        QRegion region;

        bool hover;

        OperationInfo(uint changeFlags, Qt::CursorShape cursorShape, bool hover = true)

            : changeFlags(changeFlags),

              cursorShape(cursorShape),

              hover(hover)

        {}

    };

    typedef QMap<Operation, OperationInfo> OperationInfoMap;

    QMdiSubWindowPrivate();

    // Variables.

    QPointer<QWidget> baseWidget;

    QPointer<QWidget> restoreFocusWidget;

    QPointer<QMdi::ControlContainer> controlContainer;

#ifndef QT_NO_SIZEGRIP

    QPointer<QSizeGrip> sizeGrip;

#endif

#ifndef QT_NO_RUBBERBAND

    QRubberBand *rubberBand;

#endif

    QPoint mousePressPosition;

    QRect oldGeometry;

    QSize internalMinimumSize;

    QSize userMinimumSize;

    QSize restoreSize;

    bool resizeEnabled;

    bool moveEnabled;

    bool isInInteractiveMode;

#ifndef QT_NO_RUBBERBAND

    bool isInRubberBandMode;

#endif

    bool isShadeMode;

    bool ignoreWindowTitleChange;

    bool ignoreNextActivationEvent;

    bool activationEnabled;

    bool isShadeRequestFromMinimizeMode;

    bool isMaximizeMode;

    bool isWidgetHiddenByUs;

    bool isActive;

    bool isExplicitlyDeactivated;

    int keyboardSingleStep;

    int keyboardPageStep;

    int resizeTimerId;

    Operation currentOperation;

    QStyle::SubControl hoveredSubControl;

    QStyle::SubControl activeSubControl;

    Qt::FocusReason focusInReason;

    OperationInfoMap operationMap;

    QPointer<QMenu> systemMenu;

#ifndef QT_NO_ACTIONS

    QPointer<QAction> actions[NumWindowStateActions];

#endif

    QMdiSubWindow::SubWindowOptions options;

    QString lastChildWindowTitle;

    QPalette titleBarPalette;

    QString windowTitle;

    QFont font;

    QIcon menuIcon;

    QStyleOptionTitleBar cachedStyleOptions;

    QString originalTitle;

    // Slots.

    void _q_updateStaysOnTopHint();

    void _q_enterInteractiveMode();

    void _q_processFocusChanged(QWidget *old, QWidget *now);

    // Functions.

    void leaveInteractiveMode();

    void removeBaseWidget();

    void initOperationMap();

#ifndef QT_NO_MENU

    void createSystemMenu();

#endif

    void updateCursor();

    void updateDirtyRegions();

    void updateGeometryConstraints();

    void updateMask();

    void setNewGeometry(const QPoint &pos);

    void setMinimizeMode();

    void setNormalMode();

    void setMaximizeMode();

    void setActive(bool activate, bool changeFocus = true);

    void processClickedSubControl();

    QRegion getRegion(Operation operation) const;

    Operation getOperation(const QPoint &pos) const;

    QStyleOptionTitleBar titleBarOptions() const;

    void ensureWindowState(Qt::WindowState state);

    int titleBarHeight(const QStyleOptionTitleBar &options) const;

    void sizeParameters(int *margin, int *minWidth) const;

    bool drawTitleBarWhenMaximized() const;

#ifndef QT_NO_MENUBAR

    QMenuBar *menuBar() const;

    void showButtonsInMenuBar(QMenuBar *menuBar);

    void removeButtonsFromMenuBar();

#endif

    void updateWindowTitle(bool requestFromChild);

#ifndef QT_NO_RUBBERBAND

    void enterRubberBandMode();

    void leaveRubberBandMode();

#endif

    QPalette desktopPalette() const;

    void updateActions();

    void setFocusWidget();

    void restoreFocus();

    void setWindowFlags(Qt::WindowFlags windowFlags);

    void setVisible(WindowStateAction, bool visible = true);

#ifndef QT_NO_ACTION

    void setEnabled(WindowStateAction, bool enable = true);

#ifndef QT_NO_MENU

    void addToSystemMenu(WindowStateAction, const QString &text, const char *slot);

#endif

#endif // QT_NO_ACTION

    QSize iconSize() const;

#ifndef QT_NO_SIZEGRIP

    void setSizeGrip(QSizeGrip *sizeGrip);

    void setSizeGripVisible(bool visible = true) const;

#endif

    void updateInternalWindowTitle();

    QString originalWindowTitle();

    void setNewWindowTitle();

    inline int titleBarHeight() const

    {

        Q_Q(const QMdiSubWindow);

        if (!parent || q->windowFlags() & Qt::FramelessWindowHint

            || (q->isMaximized() && !drawTitleBarWhenMaximized())) {

            return 0;

        }

        QStyleOptionTitleBar options = titleBarOptions();

        int height = options.rect.height();

        if (hasBorder(options))

            height += q->isMinimized() ? 8 : 4;

        return height;

    }

    inline QStyle::SubControl getSubControl(const QPoint &pos) const

    {

        Q_Q(const QMdiSubWindow);

        QStyleOptionTitleBar titleBarOptions = this->titleBarOptions();

        return q->style()->hitTestComplexControl(QStyle::CC_TitleBar, &titleBarOptions, pos, q);

    }

    inline void setNewGeometry(QRect *geometry)

    {

        Q_Q(QMdiSubWindow);

        Q_ASSERT(parent);

        geometry->setSize(geometry->size().expandedTo(internalMinimumSize));

#ifndef QT_NO_RUBBERBAND

        if (isInRubberBandMode)

            rubberBand->setGeometry(*geometry);

        else

#endif

            q->setGeometry(*geometry);

    }

    inline bool hasBorder(const QStyleOptionTitleBar &options) const

    {

        Q_Q(const QMdiSubWindow);

        return !q->style()->styleHint(QStyle::SH_TitleBar_NoBorder, &options, q);

    }

    inline bool autoRaise() const

    {

        Q_Q(const QMdiSubWindow);

        return q->style()->styleHint(QStyle::SH_TitleBar_AutoRaise, 0, q);

    }

    inline bool isResizeOperation() const

    {

        return currentOperation != None && currentOperation != Move;

    }

    inline bool isMoveOperation() const

    {

        return currentOperation == Move;

    }

};

#endif // QT_NO_MDIAREA

QT_END_NAMESPACE

#endif // QMDISUBWINDOW_P_H