qpopupmenu.h

/****************************************************************************
** $Id: //depot/qt/main/src/widgets/qpopupmenu.h#71 $
**
** Definition of QPopupMenu class
**
** Created : 941128
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the widgets module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
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**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
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**********************************************************************/

#ifndef QPOPUPMENU_H
#define QPOPUPMENU_H

#ifndef QT_H
#include "qframe.h"
#include "qmenudata.h"
#endif // QT_H

#ifndef QT_NO_POPUPMENU


class Q_EXPORT QPopupMenu : public QFrame, public QMenuData
{
    Q_OBJECT
    Q_PROPERTY( bool checkable READ isCheckable WRITE setCheckable )
public:
    QPopupMenu( QWidget *parent=0, const char *name=0 );
   ~QPopupMenu();

    void        popup( const QPoint & pos, int indexAtPoint = 0 );// open popup
    void        updateItem( int id );

    virtual void        setCheckable( bool );
    bool        isCheckable() const;

    void        setFont( const QFont & );       // reimplemented set font
    void        show();                         // reimplemented show
    void        hide();                         // reimplemented hide

    int         exec();
    int         exec( const QPoint & pos, int indexAtPoint = 0 );// modal popup

    virtual void        setActiveItem( int );
    QSize       sizeHint() const;

    int         idAt( int index ) const { return QMenuData::idAt( index ); }
    int         idAt( const QPoint& pos ) const;

    bool        customWhatsThis() const;

    int insertTearOffHandle( int id=-1, int index=-1 );
    
    void        activateItemAt( int index ); // ### virtual in QMenuData 3.0


signals:
    void        activated( int itemId );
    void        highlighted( int itemId );
    void        activatedRedirect( int itemId );// to parent menu
    void        highlightedRedirect( int itemId );
    void        aboutToShow();
    void        aboutToHide();

protected:
    int         itemHeight( int ) const;
    int         itemHeight( QMenuItem* mi ) const;
    void        drawItem( QPainter* p, int tab, QMenuItem* mi,
                   bool act, int x, int y, int w, int h);

    void        drawContents( QPainter * );

    void        closeEvent( QCloseEvent *e );
    void        paintEvent( QPaintEvent * );
    void        mousePressEvent( QMouseEvent * );
    void        mouseReleaseEvent( QMouseEvent * );
    void        mouseMoveEvent( QMouseEvent * );
    void        keyPressEvent( QKeyEvent * );
    void        focusInEvent( QFocusEvent * );
    void        focusOutEvent( QFocusEvent * );
    void        timerEvent( QTimerEvent * );
    void        styleChange( QStyle& );
    int         columns() const;

    bool focusNextPrevChild( bool next );

private slots:
    void        subActivated( int itemId );
    void        subHighlighted( int itemId );
#ifndef QT_NO_ACCEL
    void        accelActivated( int itemId );
    void        accelDestroyed();
#endif
    void        modalActivation( int );

    void        subMenuTimer();
    void        allowAnimation();
    void     toggleTearOff();

private:
    void        menuContentsChanged();
    void        menuStateChanged();
    void        menuInsPopup( QPopupMenu * );
    void        menuDelPopup( QPopupMenu * );
    void        frameChanged();

    void        actSig( int, bool = FALSE );
    void        hilitSig( int );
    virtual void        setFirstItemActive();
    void        hideAllPopups();
    void        hidePopups();
    bool        tryMenuBar( QMouseEvent * );
    void        byeMenuBar();

    int         itemAtPos( const QPoint & ) const;
    QRect               itemGeometry( int index ); // ## protected in 3.0
    void        updateSize();
    void        updateRow( int row );
#ifndef QT_NO_ACCEL
    void        updateAccel( QWidget * );
    void        enableAccel( bool );
#endif
    QMenuItem  *selfItem;
#ifndef QT_NO_ACCEL
    QAccel     *autoaccel;
#endif
    int popupActive;
    int tab;
    uint accelDisabled : 1;
    uint checkable : 1;
    uint connectModalRecursionSafety : 1;
    uint tornOff : 1;
    int maxPMWidth;
    int ncols;
    bool        snapToMouse;
    bool        tryMouseEvent( QPopupMenu *, QMouseEvent * );

    friend class QMenuData;
    friend class QMenuBar;

    void connectModal(QPopupMenu* receiver, bool doConnect);

private:        // Disabled copy constructor and operator=
#if defined(Q_DISABLE_COPY)
    QPopupMenu( const QPopupMenu & );
    QPopupMenu &operator=( const QPopupMenu & );
#endif
};


#endif // QT_NO_POPUPMENU

#endif // QPOPUPMENU_H