MainWindow animation -- sliding panel

[Noob]

Hi, I want to add sliding panel to my MainWindow, so I am trying to use the QPropertyAnimation;

animation = new QPropertyAnimation(ui->centralWidget, "geometry"); 
    animation->setDuration(10000);
    animation->setStartValue(QRect(0,0,356,330));
    animation->setEndValue(QRect(0,0,450,330));

animation = new QPropertyAnimation(ui->centralWidget, "geometry"); 
    animation->setDuration(10000);
    animation->setStartValue(QRect(0,0,356,330));
    animation->setEndValue(QRect(0,0,450,330));

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and activating it by a PushButton :

void MainWindow::buttonSlideClicked()
{
    animation->start();
}

void MainWindow::buttonSlideClicked()
{
    animation->start();
}

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but it doesn't work. What I have to do to make it.

[wysota]

Please define what "doesn't work" means in this situation. Is ui->centralWidget part of a layout (if it's the central widget of a main window then it is)? Geometry of widgets that are managed by layouts cannot be controlled by the geometry property because the layout will override those values.

[Noob]

dosen't work means, that slideButton clicked dosen't slide the panel.

Yes, centralWidget is a MainWindow widget. If it cannot be controlled this way, how can I acces the geometry properties of this widget? I tried tu constract the animation with the MainWindow object (QMainWindow) but the compiler says, this is an invalid use of the MainWindow.

Thanks for answer, cheers

In a shortcut i want to make the MainWindow bigger on a clickButton.

[wysota]

You can put your panel inside the central widget of the main window (but don't make it part of a layout) and then animate it.

[Noob]

Well, I put a new widget inside the centralWidget. I ve got there one gridLayout and its outside of this. How can I ensure that it dosen't belong to any default layout? Becouse theres still no action by clicking my connected button;

I khnow it's a lot of question, but I am completly new in Qt, I'm reading still but theres a lot of information.

[wysota]

If you don't put it in a layout then it is not part of a layout. If animation doesn't work, it doesn't mean it has to be because of the layout.