QPropertyAnimation menubar

Yacinoben

Hello,
I have a QMainWindow class, i want to show/hide the menubar with an slow animation, because she's shown and hidden immediately. There is a QPropertyAnimation class, but i dont how to use this with a menubar
Thanks

mostefa

Hi @Yacinoben

I think that you need to use the QPropertyAnimation with QGraphicsOpacityEffect:

Here is a simple animation example with QPushButton:

#include "mainwindow.h"

#include <QApplication>
#include <QGraphicsOpacityEffect>
#include <QPropertyAnimation>
#include <QPushButton>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    QGraphicsOpacityEffect *opacity = new QGraphicsOpacityEffect;
    QPropertyAnimation *anim = new QPropertyAnimation( opacity, "opacity" );

    QPushButton *animatedButton = new QPushButton( "Animation", &w );
    animatedButton->setGraphicsEffect( opacity );

    anim->setDuration( 2000 );
    anim->setStartValue( 0.1 );
    anim->setEndValue( 1.0 );
    anim->setEasingCurve( QEasingCurve::InCubic );
    anim->start();

    w.show();

    return a.exec();
}

You can get inspired from this example to achieve your animation.

To go further i advise you to read the Qt Animation overview