[news.eclipse.tools.gef] Re: implementing cut/copy/paste

["CL [dnoyeb] Gilbert" <Lamont_Gilbert@xxxxxxxxxxxxxxxxx>]

Well lets go over all the steps.

1. Create Cut/Copy/Paste commands based on org.eclipse.gef.commands.Command

2. Create Cut/Copy actions based on 
org.eclipse.gef.ui.actions.SelectionAction
paste probably wont be a selection action since its not based on selection
be sure to properly override calculateEnabled()
be sure in the init method or some other appropriate place to
setID(ActionFactory.PASTE.getId());



3. Override createActions of GraphicalEditor
NOTE: these are not retarget actions but the ones you created in step 2

super.createActions();
action = new CopyAction((IworkbenchPart)this);
registry.registerAction(action)
getSelectionActions().add(action.getId());


4. in your editorContributor override buildActions and add retarget 
actions here

//first create and register the retarget action
IWorkbenchWindow = getPage().getWorkbenchWindow();
addRetargetAction((RetargetAction)ActionFactory.COPY.create(iww));

//then add it to a menu or toolbar
override ContributeToToolBar(IToolBarManager tbm) or wherever you want 
to add the actions

tbm.add(getAction(ActionFactory.COPY.getId()));

or contributeToMenu

Only way off hand I know how to use the editor contributor is by telling 
the xml file to use it if you extend the point org.eclipse.ui.editors add

contributorClass = "MyContributor"

Wish I could be more help with a more direct route, but I think you got 
this part fixed anyway since you are actually seeing the buttons and 
menuitems.







Jesper Eskilson wrote:
> Randy Hudson wrote:
>
> > The registry should hold onto actions maintained by the Editor instance.
> > RetargetActions should only be created by the ActionBarContributor, 
> > not each
> > editor instance.
> >
> > The purpose of retarget actions is to map a single 
> > ActionBarContributor to
> > multiple editor instances within a given WorkbenchWindow.  I think 
> > actionbar
> > contributors were designed as 1-per-window-per-editor-type to reduce 
> > flicker
> > and repainting when changing between multiple java CU editors.  It also
> > reduces the number of native widgets created.
>
>
> Ok, thanks. The mist is clearing a little now.
>
> The problem was (I think) that I added the retarget-actions to the 
> editors registry instead of using addRetargetAction().
>
> So, now I've changed my actionbar-contributor to do the following:
>
> IWorkbenchWindow window = 
> PlatformUI.getWorkbench().getActiveWorkbenchWindow();
>        
> addRetargetAction((RetargetAction) ActionFactory.CUT.create(window));
> addRetargetAction((RetargetAction) ActionFactory.COPY.create(window));
> addRetargetAction((RetargetAction) ActionFactory.PASTE.create(window));
>
> but now I get a ClassCastException() in
>
> org.eclipse.ui.actions.RetargetAction.propagateChange(RetargetAction.java:195) 
>
>
> Apparently this mist didn't clear enough. :-)
>
> /Jesper


--
Respectfully,


CL Gilbert

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the sheepfold{}, but climbeth up some other *way, the same is a thief 
and a robber."

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