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Bug 508987

Summary:	Support creation and deletion of root content via CreationPolicy and DeletionPolicy.
Product:	[Tools] GEF	Reporter:	Matthias Wienand <matthias.wienand>
Component:	GEF MVC	Assignee:	Alexander Nyßen <nyssen>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	nyssen
Version:	1.0.0
Target Milestone:	5.0.0 (Oxygen) M5
Hardware:	All
OS:	All
Whiteboard:

Description Matthias Wienand

2016-12-09 08:27:27 EST

Currently, the CreationPolicy and DeletionPolicy only support the creation and deletion of nested content, but do not support the creation and deletion of root content, i.e. changes to the IViewer#contentsProperty() cannot be performed using CreationPolicy and DeletionPolicy.

We should allow the creation and deletion of root content using the CreationPolicy and DeletionPolicy. Therefore, the CreationPolicy should be extended to allow the creation of content for an IRootPart as the parent, and the DeletionPolicy should be extended to allow the deletion of a part whose parent is an IRootPart.

Comment 1 Alexander Nyßen

2016-12-09 09:08:36 EST

I generalized the contract of CreationPolicy and DeletionPolicy to properly handle root content. We should change the logo example to no longer use model part, so this functionality gets used in the example code (up to now I have only roughly tested it with a modified palette example).

Comment 2 Alexander Nyßen

2017-01-02 09:07:18 EST

I pushed the following changes to origin/master:

- Removed GeometricModelPart from logo example so that content creation and deletion is performed using the root part.
- Exposed layers of LayeredRootPart, so content creation can obtain the content layer.

The example thus now makes use of this functionality. Resolving as fixed in 5.0.0 M5.