Papyrus-Sirius encapsulates Sirius GMF Diagram inside a multi page editor. In a such context, the method org.eclipse.gmf.runtime.diagram.ui.editpolicies.DiagramAssistantEditPolicy.isDiagramPartActive() is not able to find the expected IDiagramWorkbenchPart to activate the popup bar.
Papyrus-Sirius encapsulates Sirius GMF Diagram inside a multi page editor. In a such context, the method org.eclipse.gmf.runtime.diagram.ui.editpolicies.DiagramAssistantEditPolicy.isDiagramPartActive() is not able to find the expected IDiagramWorkbenchPart to activate the popup bar.
This issue will allow to close the Papyrus-Sirius bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=581705.