[Interest] animation problems

[Nurmi J-P]

On 25 Nov 2013, at 14:57, Graham Labdon <Graham.Labdon at avalonsciences.com> wrote:

> Hi
> I am trying to animate the movement of one of my widgets
> I have a simple Qt app consists of a main window with a label (done in QDesigner)
> The code to move the label is
>         QPropertyAnimation animation(ui.label,"geometry");
>         animation.setDuration(10000);
>         animation.setStartValue(ui.label->rect());
>         QRect end = QRect(ui.label->rect().x() - 10,ui.label->y() - 10,ui.label->rect().width(),ui.label->rect().height());
>         animation.setEndValue(end);
>         animation.start();
>  
> Now this does move the label but it is move instantly whereas I thought that by specifying a duration , this would be how long it took to do the animation.
>  
> I would be grateful if some could explain what I am doing wrong

Hi, try allocating the animation on the heap so that it won’t get immediately destructed according to the normal C++ scoping rules.

    QPropertyAnimation *animation = new QPropertyAnimation(ui.label,"geometry”);
    …
    animation->start(QAbstractAnimation::DeleteWhenStopped);

--
J-P Nurmi