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[XWT] ToolItem.enabled with MultiBinding [message #637087]

Thu, 04 November 2010 07:09

Erdal Karaca

Messages: 836
Registered: July 2009

Senior Member

I need to enable a tool item only if two independent sources change:

<TableViever x:name="viewer1" >...
<TableViever x:name="viewer2" >...

<ToolItem ...
<ToolItem.enabled>
<MultiBinding updateSourceTrigger="PropertyChanged">
<Binding elementName="viewer1" path="singleSelection" />
<Binding elementName="viewer2" path="singleSelection" />
</MultiBinding>
</ToolItem.enabled>
</ToolItem>

In the log, I can see this message:
SEVERE: Binding expression has a problem with singleSelection

Is this scenario supposed to work? What do I miss?

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Re: [XWT] ToolItem.enabled with MultiBinding [message #637617 is a reply to message #637087]

Sun, 07 November 2010 22:00

Yves YANG

Messages: 688
Registered: July 2009

Senior Member

Hi Erdal ,

By now, the MultiBinding supports only the String type. It can work if you
use a local converter.

<MultiBinding updateSourceTrigger="PropertyChanged"
Converter="MyBooleanMultiConverter">
<Binding elementName="viewer1" path="singleSelection" />
<Binding elementName="viewer2" path="singleSelection" />
</MultiBinding>

MyBooleanMultiConvertershould be an classs that implements the interface
IMultiValueConverter.

Best regards
Yves YANG
"Erdal Karaca" <erdal.karaca.de@googlemail.com> wrote in message
news:iatlvt$ilf$1@news.eclipse.org...
> I need to enable a tool item only if two independent sources change:
>
> <TableViever x:name="viewer1" >...
> <TableViever x:name="viewer2" >...
>
> <ToolItem ...
> <ToolItem.enabled>
> <MultiBinding updateSourceTrigger="PropertyChanged">
> <Binding elementName="viewer1" path="singleSelection" />
> <Binding elementName="viewer2" path="singleSelection" />
> </MultiBinding>
> </ToolItem.enabled>
> </ToolItem>
>
> In the log, I can see this message:
> SEVERE: Binding expression has a problem with singleSelection
>
> Is this scenario supposed to work? What do I miss?

Report message to a moderator

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