[news.eclipse.tools.gef] Re: Drag and drop an EditPart

["Randy Hudson" <none@xxxxxxxxxx>]

You must use native Drag-and-Drop to drag from one Canvas to another SWT 
control or another application.

See TransferDragSourceListener.

"Prashanto" <prashanto.chatterjee@xxxxxxxxxxxxxx> wrote in message 
news:a8456d407d00397361c54f28d2aca934$1@xxxxxxxxxxxxxxxxxx
> Hi All,
> I am trying to drag an object(ServiceEditPart) with the following edit 
> policy:
>
> ------------------------------------------------------------------------------
> protected void createEditPolicies() {
>    installEditPolicy(EditPolicy.COMPONENT_ROLE, new 
> StandardGUIAppComponentEditPolicy());
> ------------------------------------------------------------------------------
>
> into a different editor altogether.
>
> Now this particular object sits inside a section(ServiceSectionEditPart) 
> that has the following editpolicy:
>
> ------------------------------------------------------------------------------
> protected void createEditPolicies() {
> installEditPolicy(EditPolicy.LAYOUT_ROLE, new LayoutEditPolicy(){
>
> protected EditPolicy createChildEditPolicy(EditPart child) {
> // TODO Auto-generated method stub
> return null;
> }
>
> protected Command getCreateCommand(CreateRequest request) {
> // TODO Auto-generated method stub
> Object newType = request.getNewObjectType();
> if(newType == Service.class){
> ServiceAddCommand singlePageCommand = new 
> ServiceAddCommand((Shape)request.getNewObject(), 
> (ServiceSection)getHost().getModel(), new Rectangle(0, 0, 80, 64));
> return singlePageCommand;
> }else{
> return null;
> }
> }
>
> protected Command getDeleteDependantCommand(Request request) {
> // TODO Auto-generated method stub
> return null;
> }
>
> protected Command getMoveChildrenCommand(Request request) {
> // TODO Auto-generated method stub
> return null;
> }
>
> }); installEditPolicy(EditPolicy.COMPONENT_ROLE, new 
> StandardGUIAppComponentEditPolicy());
> }
> ------------------------------------------------------------------------------
>
> I can assume that I require another policy:
>
> ------------------------------------------------------------------------------
> installEditPolicy(EditPolicy.PRIMARY_DRAG_ROLE, new
> NonResizableEditPolicy());
> ------------------------------------------------------------------------------
>
> to allow drag (Plz correct me if I am wrong).
>
> Now I have the following questions:
> 1. Can I have edit-policies that allow dragging across editors?
> 2. If yes then which editpolicy do I use for the drag-source and the 
> drag-target?
>
> Appreciate any help in this regard,
> Prashanto Chatterjee
>