Thanks Srini.
I don't think the animation is the actual problem here but rather
getting the actual widget's position. the animation just makes it
obvious that widget.pos() is hot the true position of the widget, as it
seems to get offset by parents' frame widths and other stuff (at least
that's what it looks like).
So in other words, I'm just after a 100% reliable way to get a widget's
position on screen no matter what layout/parent widget it is part of.
Sorry for not posting an example snippet, will try to extract a light
weight bit a bit later if required.
Cheers,
frank
On 19/06/12 5:30 PM, Srini Kommoori wrote:
Frank, Pls disregard the previous info then.
I tried doing my own animation but gave up after playing around with
QGraphicsView as it has in-built animation controls.
While trying to do my own custom animation, QPainterPath.cubicTo was
very useful in getting bezier curve implementation for smooth
animations. If you are not using this, it might be useful (
http://goo.gl/0qlBG - PySide docs to QtGui.QPainterPath.cubicTo)
All the best.
thanks,
-Srini
On Mon, Jun 18, 2012 at 9:14 PM, Frank Rueter | OHUfx <[email protected]
<mailto:[email protected]>> wrote:
Hi Srini,
thanks for the details but I'm not using QGraphicsView.
This is a custom Widget with a stacked layout, that slides the old
widgets out of frame and the new ones in.
I'm thinking something like this might be what I need to collect
and add to the widgets' position to get their true positional
values (so the animation won't stutter):
self.style().pixelMetric( QStyle.PM_DefaultFrameWidth )
On 19/06/12 4:08 PM, Srini Kommoori wrote:
As you are asking about animation, I am assuming you are
using QtGui.QGraphicsView.
Working with QGraphicsView, I found following few key things
related to size/coordinates.
1. By default QtGui.QGraphicsView aligns the scene to center. So
all resizes are set wrt center. To change the anchoring back to
top, use following.
setAlignment(QtCore.Qt.AlignTop)
2. If you are trying to get resizable scene, you may want to
use resizeEvent of QtGui.QGraphicsView and adjust your
widgets/layouts.
3. Have a default screen size so that widget reference starting
point is something you can always control. You could also do
relative distances based on the screen size - but it is some more
initialization that you need to take care of.
Hope above is what you are looking for.
thanks
-Srini
On Mon, Jun 18, 2012 at 4:33 PM, Frank Rueter | OHUfx
<[email protected] <mailto:[email protected]>> wrote:
Hi everyone,
I am trying to learn what inherited value may contribute to a
widget's
real screen position.
In my example I have a widget that I am animating out of
frame, so I
need to determine exactly what it's static position is to be
able to set
that as the animation's start value. If I just use
QWidget.pos().x() I
am 5 pixels off. So currently I'm just adding 5 pixels
manually, but
would love to understand where those come from and how to
calculate the
widget's position properly and reliably.
Any ideas anyone?
Cheers,
frank
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