Source Code (Use browser search to find items of interest.)

qt'QFDProgressAnimation (./qt-2.1.0/src/dialogs/qfiledialog.cpp:657)

class QFDProgressAnimation : public QWidget
{
    Q_OBJECT

public:
    QFDProgressAnimation( QWidget *parent );
    void start();

private slots:
    void next();

protected:
    void paintEvent( QPaintEvent *e );

private:
    int step;
    QTimer *timer;

};

QFDProgressAnimation::QFDProgressAnimation( QWidget *parent )
    : QWidget( parent )
{
    setFixedSize( 300, 50 );
    step = -1;
    next();
    timer = new QTimer( this );
    connect( timer, SIGNAL( timeout() ),
	     this, SLOT( next() ) );
}

void QFDProgressAnimation::start()
{
    timer->start( 150, FALSE );
}

void QFDProgressAnimation::next()
{
    ++step;
    if ( step > 10 )
	step = 0;
    repaint();
}

void QFDProgressAnimation::paintEvent( QPaintEvent * )
{
    erase();

    QPainter p;
    p.begin( this );
    if ( step == 0 ) {
	p.drawPixmap( 5, ( height() - startCopyIcon->height() ) / 2,
		      *startCopyIcon );
	p.drawPixmap( width() - 5 - openFolderIcon->width(),
		      ( height() - openFolderIcon->height() ) / 2 , *openFolderIcon );
    } else if ( step == 10 ) {
	p.drawPixmap( 5, ( height() - openFolderIcon->height() ) / 2,
		      *openFolderIcon );
	p.drawPixmap( width() - 5 - endCopyIcon->width(),
		      ( height() - endCopyIcon->height() ) / 2 , *endCopyIcon );
    } else {
	p.drawPixmap( 5, ( height() - openFolderIcon->height() ) / 2,
		      *openFolderIcon );
	p.drawPixmap( width() - 5 - openFolderIcon->width(),
		      ( height() - openFolderIcon->height() ) / 2 , *openFolderIcon );
	int x = 10 + openFolderIcon->width();
	int w = width() - 2 * x;
	int s = w / 9;
	p.drawPixmap( x + s * step, ( height() - fileIcon->height() ) / 2 - fileIcon->height(),
		      *fileIcon );
    }
}

qt'QFDProgressAnimation::paintEvent() (./qt-2.1.0/src/dialogs/qfiledialog.cpp:701)

void QFDProgressAnimation::paintEvent( QPaintEvent * )
{
    erase();

    QPainter p;
    p.begin( this );
    if ( step == 0 ) {
	p.drawPixmap( 5, ( height() - startCopyIcon->height() ) / 2,
		      *startCopyIcon );
	p.drawPixmap( width() - 5 - openFolderIcon->width(),
		      ( height() - openFolderIcon->height() ) / 2 , *openFolderIcon );
    } else if ( step == 10 ) {
	p.drawPixmap( 5, ( height() - openFolderIcon->height() ) / 2,
		      *openFolderIcon );
	p.drawPixmap( width() - 5 - endCopyIcon->width(),
		      ( height() - endCopyIcon->height() ) / 2 , *endCopyIcon );
    } else {
	p.drawPixmap( 5, ( height() - openFolderIcon->height() ) / 2,
		      *openFolderIcon );
	p.drawPixmap( width() - 5 - openFolderIcon->width(),
		      ( height() - openFolderIcon->height() ) / 2 , *openFolderIcon );
	int x = 10 + openFolderIcon->width();
	int w = width() - 2 * x;
	int s = w / 9;
	p.drawPixmap( x + s * step, ( height() - fileIcon->height() ) / 2 - fileIcon->height(),
		      *fileIcon );
    }
}