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Enabling commands for particular file types only [message #623555] Wed, 16 September 2009 12:26
Patrick Konemann is currently offline Patrick Konemann
Messages: 116
Registered: July 2009
Senior Member
Dear newsgroup,

I am not really sure whether this is the right newsgroup to ask, please tell me then whether there is a more appropriate one.

When defining actions in Eclipse, you can enable them only for particular file types in the extension definition (e.g. nameFilter="*.txt" in the objectContribution).
Following the command framework [1], restrictions can be modeled in the activeWhen clause of the handler, however, I cannot figure out how to restrict the handler to particular file types only.

I could not find any documentation for doing that.
Here is my extension so far:

<extension
point="org.eclipse.ui.handlers">
<handler
class="mypackage.MyHandler"
commandId="myCommand">
<activeWhen>
<with
variable="selection">
<iterate
operator="and">
<instanceof
value="org.eclipse.core.resources.IFile">
</instanceof>
[I guess the file type restriction has to go here]
</iterate>
</with>
</activeWhen>
</handler>
</extension>


Any help appreciated.

Best regards
Patrick


[1] http://wiki.eclipse.org/Platform_Command_Framework
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