source: trunk/src/widgets/qtoolbutton.cpp@ 94

/****************************************************************************
** $Id: qtoolbutton.cpp 2 2005-11-16 15:49:26Z dmik $
**
** Implementation of QToolButton class
**
** Created : 980320
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the widgets module of the Qt GUI Toolkit.
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** 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.
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** licenses may use this file in accordance with the Qt Commercial License
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**********************************************************************/

#undef QT_NO_COMPAT
#include "qtoolbutton.h"
#ifndef QT_NO_TOOLBUTTON

#include "qdrawutil.h"
#include "qpainter.h"
#include "qpixmap.h"
#include "qwmatrix.h"
#include "qapplication.h"
#include "qstyle.h"
#include "qmainwindow.h"
#include "qtooltip.h"
#include "qtoolbar.h"
#include "qimage.h"
#include "qiconset.h"
#include "qtimer.h"
#include "qpopupmenu.h"
#include "qguardedptr.h"

class QToolButtonPrivate
{
    // ### add tool tip magic here
public:
#ifndef QT_NO_POPUPMENU
    QGuardedPtr<QPopupMenu> popup;
    QTimer* popupTimer;
    int delay;
#endif
    Qt::ArrowType arrow;
    uint instantPopup       : 1;
    uint autoraise          : 1;
    uint repeat             : 1;
    uint discardNextMouseEvent : 1;
    QToolButton::TextPosition textPos;
};


/*!
    \class QToolButton qtoolbutton.h
    \brief The QToolButton class provides a quick-access button to
    commands or options, usually used inside a QToolBar.

    \ingroup basic
    \mainclass

    A tool button is a special button that provides quick-access to
    specific commands or options. As opposed to a normal command
    button, a tool button usually doesn't show a text label, but shows
    an icon instead. Its classic usage is to select tools, for example
    the "pen" tool in a drawing program. This would be implemented
    with a QToolButton as toggle button (see setToggleButton() ).

    QToolButton supports auto-raising. In auto-raise mode, the button
    draws a 3D frame only when the mouse points at it. The feature is
    automatically turned on when a button is used inside a QToolBar.
    Change it with setAutoRaise().

    A tool button's icon is set as QIconSet. This makes it possible to
    specify different pixmaps for the disabled and active state. The
    disabled pixmap is used when the button's functionality is not
    available. The active pixmap is displayed when the button is
    auto-raised because the mouse pointer is hovering over it.

    The button's look and dimension is adjustable with
    setUsesBigPixmap() and setUsesTextLabel(). When used inside a
    QToolBar in a QMainWindow, the button automatically adjusts to
    QMainWindow's settings (see QMainWindow::setUsesTextLabel() and
    QMainWindow::setUsesBigPixmaps()). The pixmap set on a QToolButton
    will be set to 22x22 if it is bigger than this size. If
    usesBigPixmap() is TRUE, then the pixmap will be set to 32x32.

    A tool button can offer additional choices in a popup menu. The
    feature is sometimes used with the "Back" button in a web browser.
    After pressing and holding the button down for a while, a menu
    pops up showing a list of possible pages to jump to. With
    QToolButton you can set a popup menu using setPopup(). The default
    delay is 600ms; you can adjust it with setPopupDelay().

    \img qdockwindow.png Toolbar with Toolbuttons \caption A floating
    QToolbar with QToolbuttons

    \sa QPushButton QToolBar QMainWindow \link guibooks.html#fowler
    GUI Design Handbook: Push Button\endlink
*/

/*!
    \enum QToolButton::TextPosition

    The position of the tool button's textLabel in relation to the
    tool button's icon.

    \value BesideIcon The text appears beside the icon.
    \value BelowIcon The text appears below the icon.
*/


/*!
    Constructs an empty tool button called \a name, with parent \a
    parent.
*/

QToolButton::QToolButton( QWidget * parent, const char *name )
    : QButton( parent, name )
{
    init();
#ifndef QT_NO_TOOLBAR
    QToolBar* tb = ::qt_cast<QToolBar*>(parent);
    if ( tb ) {
        setAutoRaise( TRUE );
        if ( tb->mainWindow() ) {
            connect( tb->mainWindow(), SIGNAL(pixmapSizeChanged(bool)),
                     this, SLOT(setUsesBigPixmap(bool)) );
            setUsesBigPixmap( tb->mainWindow()->usesBigPixmaps() );
            connect( tb->mainWindow(), SIGNAL(usesTextLabelChanged(bool)),
                     this, SLOT(setUsesTextLabel(bool)) );
            setUsesTextLabel( tb->mainWindow()->usesTextLabel() );
        } else {
            setUsesBigPixmap( FALSE );
        }
    } else
#endif
    {
        setUsesBigPixmap( FALSE );
    }
}


/*!
    Constructs a tool button as an arrow button. The \c ArrowType \a
    type defines the arrow direction. Possible values are \c
    LeftArrow, \c RightArrow, \c UpArrow and \c DownArrow.

    An arrow button has auto-repeat turned on by default.

    The \a parent and \a name arguments are sent to the QWidget
    constructor.
*/
QToolButton::QToolButton( ArrowType type, QWidget *parent, const char *name )
    : QButton( parent, name )
{
    init();
    setUsesBigPixmap( FALSE );
    setAutoRepeat( TRUE );
    d->arrow = type;
    hasArrow = TRUE;
}


/*  Set-up code common to all the constructors */

void QToolButton::init()
{
    d = new QToolButtonPrivate;
    d->textPos = Under;
#ifndef QT_NO_POPUPMENU
    d->delay = 600;
    d->popup = 0;
    d->popupTimer = 0;
#endif
    d->autoraise = FALSE;
    d->arrow = LeftArrow;
    d->instantPopup = FALSE;
    d->discardNextMouseEvent = FALSE;
    bpID = bp.serialNumber();
    spID = sp.serialNumber();

    utl = FALSE;
    ubp = TRUE;
    hasArrow = FALSE;

    s = 0;

    setFocusPolicy( NoFocus );
    setBackgroundMode( PaletteButton);
    setSizePolicy( QSizePolicy( QSizePolicy::Minimum, QSizePolicy::Minimum ) );
}

#ifndef QT_NO_TOOLBAR

/*!
    Constructs a tool button called \a name, that is a child of \a
    parent (which must be a QToolBar).

    The tool button will display \a iconSet, with its text label and
    tool tip set to \a textLabel and its status bar message set to \a
    grouptext. It will be connected to the \a slot in object \a
    receiver.
*/

QToolButton::QToolButton( const QIconSet& iconSet, const QString &textLabel,
                          const QString& grouptext,
                          QObject * receiver, const char *slot,
                          QToolBar * parent, const char *name )
    : QButton( parent, name )
{
    init();
    setAutoRaise( TRUE );
    setIconSet( iconSet );
    setTextLabel( textLabel );
    if ( receiver && slot )
        connect( this, SIGNAL(clicked()), receiver, slot );
    if ( parent->mainWindow() ) {
        connect( parent->mainWindow(), SIGNAL(pixmapSizeChanged(bool)),
                 this, SLOT(setUsesBigPixmap(bool)) );
        setUsesBigPixmap( parent->mainWindow()->usesBigPixmaps() );
        connect( parent->mainWindow(), SIGNAL(usesTextLabelChanged(bool)),
                 this, SLOT(setUsesTextLabel(bool)) );
        setUsesTextLabel( parent->mainWindow()->usesTextLabel() );
    } else {
        setUsesBigPixmap( FALSE );
    }
#ifndef QT_NO_TOOLTIP
    if ( !textLabel.isEmpty() ) {
        if ( !grouptext.isEmpty() )
            QToolTip::add( this, textLabel,
                           parent->mainWindow()->toolTipGroup(), grouptext );
        else
            QToolTip::add( this, textLabel );
    } else if ( !grouptext.isEmpty() )
        QToolTip::add( this, QString::null,
                parent->mainWindow()->toolTipGroup(), grouptext );
#endif
}

#endif


/*!
    Destroys the object and frees any allocated resources.
*/

QToolButton::~QToolButton()
{
#ifndef QT_NO_POPUPMENU
    d->popupTimer = 0;
    d->popup = 0;
#endif
    delete d;
    delete s;
}


/*!
    \property QToolButton::backgroundMode
    \brief the toolbutton's background mode

    Get this property with backgroundMode().

    \sa QWidget::setBackgroundMode()
*/

/*!
    \property QToolButton::toggleButton
    \brief whether this tool button is a toggle button.

    Toggle buttons have an on/off state similar to \link QCheckBox
    check boxes. \endlink A tool button is not a toggle button by
    default.

    \sa setOn(), toggle()
*/

void QToolButton::setToggleButton( bool enable )
{
    QButton::setToggleButton( enable );
}


/*!
    \reimp
*/
QSize QToolButton::sizeHint() const
{
    constPolish();

    int w = 0, h = 0;

    if ( iconSet().isNull() && !text().isNull() && !usesTextLabel() ) {
        w = fontMetrics().width( text() );
        h = fontMetrics().height(); // boundingRect()?
    } else if ( usesBigPixmap() ) {
        QPixmap pm = iconSet().pixmap( QIconSet::Large, QIconSet::Normal );
        w = pm.width();
        h = pm.height();
        QSize iconSize = QIconSet::iconSize( QIconSet::Large );
        if ( w < iconSize.width() )
            w = iconSize.width();
        if ( h < iconSize.height() )
            h = iconSize.height();
    } else if ( !iconSet().isNull() ) {
        // ### in 3.1, use QIconSet::iconSize( QIconSet::Small );
        QPixmap pm = iconSet().pixmap( QIconSet::Small, QIconSet::Normal );
        w = pm.width();
        h = pm.height();
        if ( w < 16 )
            w = 16;
        if ( h < 16 )
            h = 16;
    }

    if ( usesTextLabel() ) {
        QSize textSize = fontMetrics().size( Qt::ShowPrefix, textLabel() );
        textSize.setWidth( textSize.width() + fontMetrics().width(' ')*2 );
        if ( d->textPos == Under ) {
            h += 4 + textSize.height();
            if ( textSize.width() > w )
                w = textSize.width();
        } else { // Right
            w += 4 + textSize.width();
            if ( textSize.height() > h )
                h = textSize.height();
        }
    }

#ifndef QT_NO_POPUPMENU
    if ( popup() && ! popupDelay() )
        w += style().pixelMetric(QStyle::PM_MenuButtonIndicator, this);
#endif
    return (style().sizeFromContents(QStyle::CT_ToolButton, this, QSize(w, h)).
            expandedTo(QApplication::globalStrut()));
}

/*!
    \reimp
 */
QSize QToolButton::minimumSizeHint() const
{
    return sizeHint();
}

/*!
    \property QToolButton::usesBigPixmap
    \brief whether this toolbutton uses big pixmaps.

    QToolButton automatically connects this property to the relevant
    signal in the QMainWindow in which it resides. We strongly
    recommend that you use QMainWindow::setUsesBigPixmaps() instead.

    This property's default is TRUE.

    \warning If you set some buttons (in a QMainWindow) to have big
    pixmaps and others to have small pixmaps, QMainWindow may not get
    the geometry right.
*/

void QToolButton::setUsesBigPixmap( bool enable )
{
    if ( (bool)ubp == enable )
        return;

    ubp = enable;
    if ( isVisible() ) {
        update();
        updateGeometry();
    }
}


/*!
    \property QToolButton::usesTextLabel
    \brief whether the toolbutton displays a text label below the button pixmap.

    The default is FALSE.

    QToolButton automatically connects this slot to the relevant
    signal in the QMainWindow in which is resides.
*/

void QToolButton::setUsesTextLabel( bool enable )
{
    if ( (bool)utl == enable )
        return;

    utl = enable;
    if ( isVisible() ) {
        update();
        updateGeometry();
    }
}


/*!
    \property QToolButton::on
    \brief whether this tool button is on.

    This property has no effect on \link isToggleButton() non-toggling
    buttons. \endlink The default is FALSE (i.e. off).

    \sa isToggleButton() toggle()
*/

void QToolButton::setOn( bool enable )
{
    if ( !isToggleButton() )
        return;
    QButton::setOn( enable );
}


/*!
    Toggles the state of this tool button.

    This function has no effect on \link isToggleButton() non-toggling
    buttons. \endlink

    \sa isToggleButton() toggled()
*/

void QToolButton::toggle()
{
    if ( !isToggleButton() )
        return;
    QButton::setOn( !isOn() );
}


/*!
    \reimp
*/
void QToolButton::drawButton( QPainter * p )
{
    QStyle::SCFlags controls = QStyle::SC_ToolButton;
    QStyle::SCFlags active = QStyle::SC_None;

    Qt::ArrowType arrowtype = d->arrow;

    if (isDown())
        active |= QStyle::SC_ToolButton;

#ifndef QT_NO_POPUPMENU
    if (d->popup && !d->delay) {
        controls |= QStyle::SC_ToolButtonMenu;
        if (d->instantPopup || isDown())
            active |= QStyle::SC_ToolButtonMenu;
    }
#endif

    QStyle::SFlags flags = QStyle::Style_Default;
    if (isEnabled())
        flags |= QStyle::Style_Enabled;
    if (hasFocus())
        flags |= QStyle::Style_HasFocus;
    if (isDown())
        flags |= QStyle::Style_Down;
    if (isOn())
        flags |= QStyle::Style_On;
    if (autoRaise()) {
        flags |= QStyle::Style_AutoRaise;
        if (uses3D()) {
            flags |= QStyle::Style_MouseOver;
            if (! isOn() && ! isDown())
                flags |= QStyle::Style_Raised;
        }
    } else if (! isOn() && ! isDown())
        flags |= QStyle::Style_Raised;

    style().drawComplexControl(QStyle::CC_ToolButton, p, this, rect(), colorGroup(),
                               flags, controls, active,
                                hasArrow ? QStyleOption(arrowtype) :
                                    QStyleOption());
    drawButtonLabel(p);
}


/*!
    \reimp
*/
void QToolButton::drawButtonLabel(QPainter *p)
{
    QRect r =
        QStyle::visualRect(style().subRect(QStyle::SR_ToolButtonContents, this), this);

    Qt::ArrowType arrowtype = d->arrow;

    QStyle::SFlags flags = QStyle::Style_Default;
    if (isEnabled())
        flags |= QStyle::Style_Enabled;
    if (hasFocus())
        flags |= QStyle::Style_HasFocus;
    if (isDown())
        flags |= QStyle::Style_Down;
    if (isOn())
        flags |= QStyle::Style_On;
    if (autoRaise()) {
        flags |= QStyle::Style_AutoRaise;
        if (uses3D()) {
            flags |= QStyle::Style_MouseOver;
            if (! isOn() && ! isDown())
                flags |= QStyle::Style_Raised;
        }
    } else if (! isOn() && ! isDown())
        flags |= QStyle::Style_Raised;

    style().drawControl(QStyle::CE_ToolButtonLabel, p, this, r,
                        colorGroup(), flags,
                        hasArrow ? QStyleOption(arrowtype) :
                            QStyleOption());
}


/*!
    \reimp
 */
void QToolButton::enterEvent( QEvent * e )
{
    if ( autoRaise() && isEnabled() )
        repaint(FALSE);

    QButton::enterEvent( e );
}


/*!
    \reimp
 */
void QToolButton::leaveEvent( QEvent * e )
{
    if ( autoRaise() && isEnabled() )
        repaint(FALSE);

    QButton::leaveEvent( e );
}

/*!
    \reimp
 */
void QToolButton::moveEvent( QMoveEvent * )
{
    //   Reimplemented to handle pseudo transparency in case the toolbars
    //   has a fancy pixmap background.
    if ( parentWidget() && parentWidget()->backgroundPixmap() &&
         autoRaise() && !uses3D() )
        repaint( FALSE );
}

/*!
    \reimp
*/
void QToolButton::mousePressEvent( QMouseEvent *e )
{
    QRect popupr =
        QStyle::visualRect( style().querySubControlMetrics(QStyle::CC_ToolButton, this,
                                       QStyle::SC_ToolButtonMenu), this );
    d->instantPopup = (popupr.isValid() && popupr.contains(e->pos()));

#ifndef QT_NO_POPUPMENU
    if ( d->discardNextMouseEvent ) {
        d->discardNextMouseEvent = FALSE;
        d->instantPopup = FALSE;
        d->popup->removeEventFilter( this );
        return;
    }
    if ( e->button() == LeftButton && d->delay <= 0 && d->popup && d->instantPopup && !d->popup->isVisible() ) {
        openPopup();
        return;
    }
#endif

    d->instantPopup = FALSE;
    QButton::mousePressEvent( e );
}

/*!
    \reimp
*/
bool QToolButton::eventFilter( QObject *o, QEvent *e )
{
#ifndef QT_NO_POPUPMENU
    if ( o != d->popup )
        return QButton::eventFilter( o, e );
    switch ( e->type() ) {
    case QEvent::MouseButtonPress:
    case QEvent::MouseButtonDblClick:
        {
            QMouseEvent *me = (QMouseEvent*)e;
            QPoint p = me->globalPos();
            if ( QApplication::widgetAt( p, TRUE ) == this )
                d->discardNextMouseEvent = TRUE;
        }
        break;
    default:
        break;
    }
#endif
    return QButton::eventFilter( o, e );
}

/*!
    Returns TRUE if this button should be drawn using raised edges;
    otherwise returns FALSE.

    \sa drawButton()
*/

bool QToolButton::uses3D() const
{
    return style().styleHint(QStyle::SH_ToolButton_Uses3D)
        && (!autoRaise() || ( hasMouse() && isEnabled() )
#ifndef QT_NO_POPUPMENU
            || ( d->popup && d->popup->isVisible() && d->delay <= 0 ) || d->instantPopup
#endif
            );
}


/*!
    \property QToolButton::textLabel
    \brief the label of this button.

    Setting this property automatically sets the text as a tool tip
    too. There is no default text.
*/

void QToolButton::setTextLabel( const QString &newLabel )
{
    setTextLabel( newLabel, TRUE );
}

/*!
    \overload

    Sets the label of this button to \a newLabel and automatically
    sets it as a tool tip if \a tipToo is TRUE.
*/

void QToolButton::setTextLabel( const QString &newLabel , bool tipToo )
{
    if ( tl == newLabel )
        return;

#ifndef QT_NO_TOOLTIP
    if ( tipToo ) {
        QToolTip::remove( this );
        QToolTip::add( this, newLabel );
    }
#endif

    tl = newLabel;
    if ( usesTextLabel() && isVisible() ) {
        update();
        updateGeometry();
    }

}

#ifndef QT_NO_COMPAT

QIconSet QToolButton::onIconSet() const
{
    return iconSet();
}

QIconSet QToolButton::offIconSet( ) const
{
    return iconSet();
}


/*!
  \property QToolButton::onIconSet
  \brief the icon set that is used when the button is in an "on" state

  \obsolete

  Since Qt 3.0, QIconSet contains both the On and Off icons. There is
  now an \l QToolButton::iconSet property that replaces both \l
  QToolButton::onIconSet and \l QToolButton::offIconSet.

  For ease of porting, this property is a synonym for \l
  QToolButton::iconSet. You probably want to go over your application
  code and use the QIconSet On/Off mechanism.

  \sa iconSet QIconSet::State
*/
void QToolButton::setOnIconSet( const QIconSet& set )
{
    setIconSet( set );
    /*
      ### Get rid of all qWarning in this file in 4.0.
      Also consider inlining the obsolete functions then.
    */
    qWarning( "QToolButton::setOnIconSet(): This function is not supported"
              " anymore" );
}

/*!
  \property QToolButton::offIconSet
  \brief the icon set that is used when the button is in an "off" state

  \obsolete

  Since Qt 3.0, QIconSet contains both the On and Off icons. There is
  now an \l QToolButton::iconSet property that replaces both \l
  QToolButton::onIconSet and \l QToolButton::offIconSet.

  For ease of porting, this property is a synonym for \l
  QToolButton::iconSet. You probably want to go over your application
  code and use the QIconSet On/Off mechanism.

  \sa iconSet QIconSet::State
*/
void QToolButton::setOffIconSet( const QIconSet& set )
{
    setIconSet( set );
}

#endif

/*! \property QToolButton::pixmap
    \brief the pixmap of the button

    The pixmap property has no meaning for tool buttons. Use the
    iconSet property instead.
*/

/*!
    \property QToolButton::iconSet
    \brief the icon set providing the icon shown on the button

    Setting this property sets \l QToolButton::pixmap to a null
    pixmap. There is no default iconset.

    \sa pixmap(), setToggleButton(), isOn()
*/
void QToolButton::setIconSet( const QIconSet & set )
{
    if ( s )
        delete s;
    setPixmap( QPixmap() );
    s = new QIconSet( set );
    if ( isVisible() )
        update();
}

/*! \overload
    \obsolete

  Since Qt 3.0, QIconSet contains both the On and Off icons.

  For ease of porting, this function ignores the \a on parameter and
  sets the \l iconSet property. If you relied on the \a on parameter,
  you probably want to update your code to use the QIconSet On/Off
  mechanism.

  \sa iconSet QIconSet::State
*/

#ifndef QT_NO_COMPAT

void QToolButton::setIconSet( const QIconSet & set, bool /* on */ )
{
    setIconSet( set );
    qWarning( "QToolButton::setIconSet(): 'on' parameter ignored" );
}

#endif

QIconSet QToolButton::iconSet() const
{
    QToolButton *that = (QToolButton *) this;

    if ( pixmap() && !pixmap()->isNull() &&
         (!that->s || (that->s->pixmap().serialNumber() !=
         pixmap()->serialNumber())) ) {
        if ( that->s )
            delete that->s;
        that->s = new QIconSet( *pixmap() );
    }
    if ( that->s )
        return *that->s;
    /*
      In 2.x, we used to return a temporary nonnull QIconSet. If you
      revert to the old behavior, you will break calls to
      QIconSet::isNull() in this file.
    */
    return QIconSet();
}

#ifndef QT_NO_COMPAT
/*! \overload
    \obsolete

  Since Qt 3.0, QIconSet contains both the On and Off icons.

  For ease of porting, this function ignores the \a on parameter and
  returns the \l iconSet property. If you relied on the \a on
  parameter, you probably want to update your code to use the QIconSet
  On/Off mechanism.
*/
QIconSet QToolButton::iconSet( bool /* on */ ) const
{
    return iconSet();
}

#endif

#ifndef QT_NO_POPUPMENU
/*!
    Associates the popup menu \a popup with this tool button.

    The popup will be shown each time the tool button has been pressed
    down for a certain amount of time. A typical application example
    is the "back" button in some web browsers's tool bars. If the user
    clicks it, the browser simply browses back to the previous page.
    If the user presses and holds the button down for a while, the
    tool button shows a menu containing the current history list.

    Ownership of the popup menu is not transferred to the tool button.

    \sa popup()
*/
void QToolButton::setPopup( QPopupMenu* popup )
{
    if ( popup && !d->popupTimer ) {
        connect( this, SIGNAL( pressed() ), this, SLOT( popupPressed() ) );
        d->popupTimer = new QTimer( this );
        connect( d->popupTimer, SIGNAL( timeout() ), this, SLOT( popupTimerDone() ) );
    }
    d->popup = popup;

    update();
}

/*!
    Returns the associated popup menu, or 0 if no popup menu has been
    defined.

    \sa setPopup()
*/
QPopupMenu* QToolButton::popup() const
{
    return d->popup;
}

/*!
    Opens (pops up) the associated popup menu. If there is no such
    menu, this function does nothing. This function does not return
    until the popup menu has been closed by the user.
*/
void QToolButton::openPopup()
{
    if ( !d->popup )
        return;

    d->instantPopup = TRUE;
    repaint( FALSE );
    if ( d->popupTimer )
        d->popupTimer->stop();
    QGuardedPtr<QToolButton> that = this;
    popupTimerDone();
    if ( !that )
        return;
    d->instantPopup = FALSE;
    repaint( FALSE );
}

void QToolButton::popupPressed()
{
    if ( d->popupTimer && d->delay > 0 )
        d->popupTimer->start( d->delay, TRUE );
}

void QToolButton::popupTimerDone()
{
    if ( (!isDown() && d->delay > 0 ) || !d->popup )
        return;

    d->popup->installEventFilter( this );
    d->repeat = autoRepeat();
    setAutoRepeat( FALSE );
    bool horizontal = TRUE;
#ifndef QT_NO_TOOLBAR
    QToolBar *tb = ::qt_cast<QToolBar*>(parentWidget());
    if ( tb && tb->orientation() == Vertical )
        horizontal = FALSE;
#endif
    QPoint p;
    QRect screen = qApp->desktop()->availableGeometry( this );
    if ( horizontal ) {
        if ( QApplication::reverseLayout() ) {
            if ( mapToGlobal( QPoint( 0, rect().bottom() ) ).y() + d->popup->sizeHint().height() <= screen.height() ) {
                p = mapToGlobal( rect().bottomRight() );
            } else {
                p = mapToGlobal( rect().topRight() - QPoint( 0, d->popup->sizeHint().height() ) );
            }
            p.rx() -= d->popup->sizeHint().width();
        } else {
            if ( mapToGlobal( QPoint( 0, rect().bottom() ) ).y() + d->popup->sizeHint().height() <= screen.height() ) {
                p = mapToGlobal( rect().bottomLeft() );
            } else {
                p = mapToGlobal( rect().topLeft() - QPoint( 0, d->popup->sizeHint().height() ) );
            }
        }
    } else {
        if ( QApplication::reverseLayout() ) {
            if ( mapToGlobal( QPoint( rect().left(), 0 ) ).x() - d->popup->sizeHint().width() <= screen.x() ) {
                p = mapToGlobal( rect().topRight() );
            } else {
                p = mapToGlobal( rect().topLeft() );
                p.rx() -= d->popup->sizeHint().width();
            }
        } else {
            if ( mapToGlobal( QPoint( rect().right(), 0 ) ).x() + d->popup->sizeHint().width() <= screen.width() ) {
                p = mapToGlobal( rect().topRight() );
            } else {
                p = mapToGlobal( rect().topLeft() - QPoint( d->popup->sizeHint().width(), 0 ) );
            }
        }
    }
    QGuardedPtr<QToolButton> that = this;
    d->popup->exec( p, -1 );
    if ( !that )
        return;

    setDown( FALSE );
    if ( d->repeat )
        setAutoRepeat( TRUE );
}

/*!
    \property QToolButton::popupDelay
    \brief the time delay between pressing the button and the appearance of the associated popup menu in milliseconds.

    Usually this is around half a second. A value of 0 draws the down
    arrow button to the side of the button which can be used to open
    up the popup menu.

    \sa setPopup()
*/
void QToolButton::setPopupDelay( int delay )
{
    d->delay = delay;

    update();
}

int QToolButton::popupDelay() const
{
    return d->delay;
}
#endif


/*!
    \property QToolButton::autoRaise
    \brief whether auto-raising is enabled or not.

    The default is disabled (i.e. FALSE).
*/
void QToolButton::setAutoRaise( bool enable )
{
    d->autoraise = enable;

    update();
}

bool QToolButton::autoRaise() const
{
    return d->autoraise;
}

/*!
    \property QToolButton::textPosition
    \brief the position of the text label of this button.
*/

QToolButton::TextPosition QToolButton::textPosition() const
{
    return d->textPos;
}

void QToolButton::setTextPosition( TextPosition pos )
{
    d->textPos = pos;
    updateGeometry();
    update();
}

/*! \reimp */

void QToolButton::setText( const QString &txt )
{
    QButton::setText( txt );
    if ( !text().isEmpty() ) {
        delete s;
        s = 0;
    }
}

#ifndef QT_NO_PALETTE
/*!
    \reimp
*/
void QToolButton::paletteChange( const QPalette & )
{
    if ( s )
        s->clearGenerated();
}
#endif

#endif