Smooth scaling QPixmap

[patrickkidd]

I have a QTableView that has gotten kind of slow to paint when animate-expanding to a pre-set width (see screenshot):

I tried to fake-optimize it by temporarily hiding it and replacing it with a redesign of the widget to a QPixmap shown by a label. The rendering obviously stretches, but fine (see screenshot):

But even that is slow! I've tested with just showing the label as a top-level window and resizing using the mouse.

Can anyone think of a faster way to animate-resize a QPixmap of about that size? Or should my table rendering be reasonably fast when animate-resizing itself?

Thanks!

[SGaist]

Hi,

How are you doing that animation ?

[patrickkidd]

I you are asking about the animation of the container of the QTableView prior to the QPixmap fake-animation fix described, then like this:

self.expandAnimation = QPropertyAnimation(self, b'size')

If you are asking about the QPixmap resize animation, then I am using the same QPropertyAnimation as above but on every valueChanged signal I resize the label with QLabel.resize().

[SGaist]

What are the parameters of the animation ?

[patrickkidd]

@SGaist

@SGaist said in Smooth scaling QPixmap:

What are the parameters of the animation ?

Just this:

        self.expandAnimation = QPropertyAnimation(self, b'size')
        self.expandAnimation.setDuration(util.ANIM_DURATION_MS)
        self.expandAnimation.setEasingCurve(util.ANIM_EASING)

[SGaist]

What are util.ANIM_DURATION_MS and util.ANIM_EASING?

[patrickkidd]

@SGaist said in Smooth scaling QPixmap:

What are util.ANIM_DURATION_MS and util.ANIM_EASING?

ANIM_DURATION_MS = 250
ANIM_EASING = QEasingCurve.OutQuad