Hi Andreas,
I have been trying to create an example that demostrates the problem -- however
it turns out that it is not easy. I haven't yet been able to create a
simple/synchronous test case that reproduces the bug.
However, I have meanwhile observed in my application that if I click a widget
which fetches a new list from the back-end (via ajax) the resulting list is not
actually drawn until I next move the mouse.
If I wait a few seconds before moving the mouse (and triggering the rendering
of the list) I never see the layout problem.
If I move the mouse constanly after clicking a widget which fetches a new list
from the back-end (via ajax) I will sometimes see the layout problem.
So it seems as thou if a list is drawn as a result of an asynch response, the
layout problem can occur - but it doesn't always.
I have tried to follow the qx source code thru to identify the problem. I can
get as far as CanvasLayoutImpl.layoutChild_sizeX which them attempts to call:
vChild._applyRuntimeWidth(vChild.getBoxWidth());
where vChild is a qx.ui.form.List instance, whose getBoxWidth() returns 431.
However, I can't find the definition of _applyRuntimeWidth() anywhere. Where
could it be hiding?
Simon
p.s. I think I will hold off logging a bug until I have confirmed 100% what the
real problem is.
----- Original Message ----
From: Andreas Ecker <[EMAIL PROTECTED]>
To: qooxdoo Development <qooxdoo-devel@lists.sourceforge.net>
Cc: Simon Bull <[EMAIL PROTECTED]>
Sent: Wednesday, 22 November, 2006 7:44:43 PM
Subject: Re: [qooxdoo-devel] qx.ui.form.List layout problem in 0.6.2-pre (r4822)
Hi Simon,
thanks for the reporting this issue.
Would you be so kind to enter a bug report into bugzilla at
http://bugzilla.qooxdoo.org ? Please attach a test html that is derived
from one of the example/test files so that it can be dropped into the
demo section without modifications.
Thanks,
Andreas
On Sun, 2006-11-19 at 14:51 -0800, Simon Bull wrote:
> Hi All,
>
> I am having a problem laying out a qx.ui.form.List. I first noticed it in
> source version r4343 - but today I updated to r4822 and am having the same
> problem.
>
> The problem occurs intermittently when adding qx.ui.form.List of
> qx.ui.form.ListItems to a CanvasLayout -- the 2nd area of a
> qx.ui.splitpane.HorizontalSplitPane.
>
> It always works fine the first time you add children. However, if you want
> to drop the list completely, and replace it with a new list it occassionally
> (approximately one time in 6 attempts) fails, and you see the following error
> messages on the console.
>
> Has anyone else seen this? Is there are known workaround or a bugfix?
>
> Thanks,
>
> Simon
>
>
>
> 040313 ERROR: qx.ui.basic.Terminator[617]: Modification of property "parent"
> failed with exception: Error - Invalid 040329 WARN:
> qx.ui.core.ClientDocument[29]: Want to render an invisible child: [object
> qx.ui.basic.Terminator] -> omitting!
> 040345 ERROR: qx.ui.layout.CanvasLayout[646]: Could not layout child [object
> qx.ui.form.List] through layout handler: TypeError - 'this._style' is null or
> not an object (#-2146823281)
> 040360 ERROR: qx.ui.form.List[2945]: Could not layout child [object
> qx.ui.form.ListItem] through layout handler: TypeError - 'this._style' is
> null or not an object (#-2146823281)
> 040376 ERROR: qx.ui.form.List[2945]: Could not layout child [object
> qx.ui.form.ListItem] through layout handler: TypeError - 'this._style' is
> null or not an object (#-2146823281)
> 040376 ERROR: qx.ui.form.List[2945]: Could not layout child [object
> qx.ui.form.ListItem] through layout handler: TypeError - 'this._style' is
> null or not an object (#-2146823281)
> 040376 ERROR: qx.ui.form.ListItem[2950]: Could not layout child [object
> qx.ui.basic.Image] through layout handler: TypeError - 'this._style' is null
> or not an object (#-2146823281)
> 040407 ERROR: qx.ui.form.ListItem[2950]: Could not post layout child [object
> qx.ui.basic.Image]: TypeError - 'null' is null or not an object (#-2146823281)
> 040407 ERROR: qx.ui.form.ListItem[2950]: Could not layout child [object
> qx.ui.basic.Label] through layout handler: TypeError - 'this._style' is null
> or not an object (#-2146823281)
> 040407 ERROR: qx.ui.form.ListItem[2950]: Could not post layout child [object
> qx.ui.basic.Label]: TypeError - 'style' is null or not an object
> (#-2146823281)
> 040423 ERROR: qx.ui.form.ListItem[2955]: Could not layout child [object
> qx.ui.basic.Image] through layout handler: TypeError - 'this._style' is null
> or not an object (#-2146823281)
> 040438 ERROR: qx.ui.form.ListItem[2955]: Could not post layout child [object
> qx.ui.basic.Image]: TypeError - 'null' is null or not an object (#-2146823281)
> 040438 ERROR: qx.ui.form.ListItem[2955]: Could not layout child [object
> qx.ui.basic.Label] through layout handler: TypeError - 'this._style' is null
> or not an object (#-2146823281)
> 040454 ERROR: qx.ui.form.ListItem[2955]: Could not post layout child [object
> qx.ui.basic.Label]: TypeError - 'style' is null or not an object
> (#-2146823281)
> 040454 ERROR: qx.ui.form.ListItem[2960]: Could not layout child [object
> qx.ui.basic.Image] through layout handler: TypeError - 'this._style' is null
> or not an object (#-2146823281)
> 040485 ERROR: qx.ui.form.ListItem[2960]: Could not post layout child [object
> qx.ui.basic.Image]: TypeError - 'null' is null or not an object (#-2146823281)
> 040485 ERROR: qx.ui.form.ListItem[2960]: Could not layout child [object
> qx.ui.basic.Label] through layout handler: TypeError - 'this._style' is null
> or not an object (#-2146823281)
> 040485 ERROR: qx.ui.form.ListItem[2960]: Could not post layout child [object
> qx.ui.basic.Label]: TypeError - 'style' is null or not an object
> (#-2146823281)
> 040501 ERROR: qx.event.handler.EventHandler[28]: Failed to handle mouse
> event: TypeError - 'getParent()._getTargetNode()' is null or not an object
> (#-2146823281)
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