C++ QBitmap::mask方法代码示例

ListBoxDevice::ListBoxDevice(const QPixmap & pixmap, const QString & title, const QString & url, const QString & name, const QString & mountPoint, bool mounted, bool ejectable, bool removable, int id) : ListBoxLink(pixmap, title, url), name_(name), mountPoint_(mountPoint), mounted_(mounted), ejectable_(ejectable), removable_(removable),id_(id)
{
   if (!eject.mask())
      eject.setMask(eject);
   if (!locked.mask())
      locked.setMask(locked);
}

void QPixmap::setMask( const QBitmap &newmask )
{
    const QPixmap *tmp = &newmask;		// dec cxx bug
    if ( (data == tmp->data) ||
	 ( newmask.handle() && newmask.handle() == handle() ) ) {
	QPixmap m = tmp->copy( TRUE );
	setMask( *((QBitmap*)&m) );
	data->selfmask = TRUE;			// mask == pixmap
	return;
    }

    if ( newmask.isNull() ) {			// reset the mask
	if (data->mask) {
	    detach();
	    data->selfmask = FALSE;

	    delete data->mask;
	    data->mask = 0;
	}
	return;
    }

    detach();
    data->selfmask = FALSE;

    if ( newmask.width() != width() || newmask.height() != height() ) {
#if defined(QT_CHECK_RANGE)
	qWarning( "QPixmap::setMask: The pixmap and the mask must have "
		  "the same size" );
#endif
	return;
    }
#if defined(Q_WS_MAC) || (defined(Q_WS_X11) && !defined(QT_NO_XFTFREETYPE))
    // when setting the mask, we get rid of the alpha channel completely
    delete data->alphapm;
    data->alphapm = 0;
#endif // Q_WS_X11 && !QT_NO_XFTFREETYPE

    delete data->mask;
    QBitmap* newmaskcopy;
    if ( newmask.mask() )
	newmaskcopy = (QBitmap*)new QPixmap( tmp->copy( TRUE ) );
    else
	newmaskcopy = new QBitmap( newmask );
#ifdef Q_WS_X11
    newmaskcopy->x11SetScreen( x11Screen() );
#endif
    data->mask = newmaskcopy;
}

/*!
  Returns a pixmap with size \a s and mode \a m, generating one if
  needed. Generated pixmaps are cached.
*/
QPixmap QIconSet::pixmap( Size s, Mode m ) const
{
    if ( !d ) {
	QPixmap r;
	return r;
    }

    QImage i;
    QIconSetPrivate * p = ((QIconSet *)this)->d;
    QPixmap * pm = 0;
    if ( s == Large ) {
	switch( m ) {
	case Normal:
	    if ( !p->large.pm ) {
		ASSERT( p->small.pm );
		i = p->small.pm->convertToImage();
		i = i.smoothScale( i.width() * 3 / 2, i.height() * 3 / 2 );
		p->large.pm = new QPixmap;
		p->large.generated = TRUE;
		p->large.pm->convertFromImage( i );
		if ( !p->large.pm->mask() ) {
		    i = i.createHeuristicMask();
		    QBitmap tmp;
		    tmp.convertFromImage( i, Qt::MonoOnly + Qt::ThresholdDither );
		    p->large.pm->setMask( tmp );
		}
	    }
	    pm = p->large.pm;
	    break;
	case Active:
	    if ( !p->largeActive.pm ) {
		p->largeActive.pm = new QPixmap( pixmap( Large, Normal ) );
		p->largeActive.generated = TRUE;
	    }
	    pm = p->largeActive.pm;
	    break;
	case Disabled:
	    if ( !p->largeDisabled.pm ) {
#if defined(_WS_QWS_) && !defined(QT_NO_DEPTH_32)
		p->largeDisabled.pm = newDisablePixmap(pixmap(Large,Normal));
#else
		QBitmap tmp;
		if ( p->large.generated && !p->smallDisabled.generated &&
		     p->smallDisabled.pm && !p->smallDisabled.pm->isNull() ) {
		    // if there's a hand-drawn disabled small image,
		    // but the normal big one is generated, use the
		    // hand-drawn one to generate this one.
		    i = p->smallDisabled.pm->convertToImage();
		    i = i.smoothScale( i.width() * 3 / 2, i.height() * 3 / 2 );
		    p->largeDisabled.pm = new QPixmap;
		    p->largeDisabled.pm->convertFromImage( i );
		    if ( !p->largeDisabled.pm->mask() ) {
			i = i.createHeuristicMask();
			tmp.convertFromImage( i, Qt::MonoOnly + Qt::ThresholdDither );
		    }
		} else {
		    if (pixmap( Large, Normal).mask())
			tmp = *pixmap( Large, Normal).mask();
		    else {
			QPixmap conv = pixmap( Large, Normal );
			if ( !conv.isNull() ) {
			    i = conv.convertToImage();
			    i = i.createHeuristicMask();
			    tmp.convertFromImage( i, Qt::MonoOnly + Qt::ThresholdDither );
			}
		    }
		    p->largeDisabled.pm
			= new QPixmap( p->large.pm->width()+1,
				       p->large.pm->height()+1);
		    QColorGroup dis( QApplication::palette().disabled() );
		    p->largeDisabled.pm->fill( dis.background() );
		    QPainter painter( p->largeDisabled.pm );
		    painter.setPen( dis.base() );
		    painter.drawPixmap( 1, 1, tmp );
		    painter.setPen( dis.foreground() );
		    painter.drawPixmap( 0, 0, tmp );
		}
		if ( !p->largeDisabled.pm->mask() ) {
		    if ( !tmp.mask() )
			tmp.setMask( tmp );
		    QBitmap mask( d->largeDisabled.pm->size() );
		    mask.fill( Qt::color0 );
		    QPainter painter( &mask );
		    painter.drawPixmap( 0, 0, tmp );
		    painter.drawPixmap( 1, 1, tmp );
		    painter.end();
		    p->largeDisabled.pm->setMask( mask );
		}
#endif
		p->largeDisabled.generated = TRUE;
	    }
	    pm = p->largeDisabled.pm;
	    break;
	}
    } else {
	switch( m ) {
//.........这里部分代码省略.........