Bug 2696

Description Randy Giffen 2001-10-10 22:41:42 EDT

From Eclipse Corner

>> I'm adding a PreferenceNode dynamically.  Going to "Window" ->
>> "Preferences", it displays its page fine.  Closing the "Preferences" now
>> will dispose its preference page (the dialog is disposed,
>> PreferenceNode.disposeResources() is called).  Trying "Window" ->
>> "Preferences" again will fail - my PreferenceNode is still there (as I
>> want it to be), but its PreferencePage is gone (BAD)...
>>
>> When can I recreate the node's page??  Or, alternatively, avoid the
>> disposing of its resources until I remove the node?  I'm using R0.9.

> I should mention that I use the PreferenceNode(String id, IPreferencePage
> preferencePage) constructor - therefore PreferenceNode.label is always null
> (so displaying the treeItem when the page is gone fails, as getTextLabel()
> returns null), and createPage() is no good, as there is no
> PreferenceNode.classname.

> The PreferenceNode(String id, String label, ImageDescriptor image, String
> className) constructor doesn't work - in createPage(), page =
> (IPreferencePage)createObject(classname) fails (although it works fine when
> I do it in my code, when extending PreferenceNode!?).  Also, I prefer to use
> the former constructor, i.e., have the PreferencePage instantiated by me
> (with a custom constructor)...

NOTES:
	RG (8/9/01 10:14:03 AM)
	We could consider keeping the pages but allowing them to dispose their widgets.
	Or we could make the preference node class abstract and force subclasses to implement
	a page creation method.