Hi Ralf,
calling setAppearance() resets those properties to its defaultValue which are
defined in the original appearance but not in the new appearance.
Let me explain this mechanism with your label example.
The original "label"-appearance in the Classic appearance-theme defines wrap
as "false". Your new "link-ref" appearance does not define the wrap property.
The defaultValue for the "wrap"-property is "true".
In this case the call of "setAppearance" leads to following behaviour:
1. get the property values from the new appearance (->"link-ref")
2. if an original appearance exists, get also the original values (-> "label")
3. reset all properties to their default value which are defined in the
original appearance ("label"), but not defined in the new appearance
("link-ref")
4. set the properties defined in the new appearance
The third step is important in your case. You did not define any value
for "wrap" in your appearance, so the widget gets resetted to its
defaultValue.
I hope this explanation did answer your question ;-)
cheers,
Alex
On Wednesday 04 April 2007 Ralf Sternberg wrote:
> Hi,
>
> I noticed that calling setAppearance on a Label resets its wrap property
> although the appearance theme contains no definition of this property.
> Example code:
>
> label.setWrap( false );
> label.debug( "_____ wrap before: " + label.getWrap() );
> label.setAppearance( "link-ref" );
> label.debug( "_____ wrap after: " + label.getWrap() );
>
> results in
>
> DEBUG: qx.ui.basic.Label[1567]: _____ wrap before: false
> DEBUG: qx.ui.basic.Label[1567]: _____ wrap after: true
>
> The appearance definition looks like this:
>
> "link-ref" : {
> initial : function( vTheme ) {
> return {
> cursor : "pointer"
> }
> }
> }
>
> Does setAppearance() generally resets properties that are not
> explicitely defined in the appearance theme?
>
> Thanks,
> Ralf
>
>
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