Bug 489116: [Sequence Diagram] Interaction Use and other fix

- Fix Null exception
- Update InteractionUseRectangle Figure 
- Make the Label dimensions protected in RoundedCompartmentFigure
- Update CSS to display the interaction Header with margin
 

Change-Id: I73725f0432340d88af7b7cd1eb01d9296cf418a8
Signed-off-by: Céline Janssens <Celine.Janssens@all4tec.net>

1 files changed, 13 insertions, 11 deletions

diff --git a/plugins/developer/org.eclipse.papyrus.gmf.editpartview/src/org/eclipse/papyrus/gmf/editpartview/view/EditPartLabelProvider.java b/plugins/developer/org.eclipse.papyrus.gmf.editpartview/src/org/eclipse/papyrus/gmf/editpartview/view/EditPartLabelProvider.java
index a87338e7953..263333f60c5 100644
--- a/plugins/developer/org.eclipse.papyrus.gmf.editpartview/src/org/eclipse/papyrus/gmf/editpartview/view/EditPartLabelProvider.java
+++ b/plugins/developer/org.eclipse.papyrus.gmf.editpartview/src/org/eclipse/papyrus/gmf/editpartview/view/EditPartLabelProvider.java
@@ -60,18 +60,20 @@ public class EditPartLabelProvider implements ITableLabelProvider, ITableColorPr
 			GraphicalEditPart editPart = (GraphicalEditPart) element;
 			IFigure figure = editPart.getContentPane();
 			Object model = editPart.getAdapter(EObject.class);
-			switch (columnIndex) {
-			case 0:
-				return editPart.getClass().getSimpleName();
-			case 1:
-				if (model instanceof NamedElement) {
-					return UMLLabelInternationalization.getInstance().getLabel((NamedElement) model);
+			if (null != figure) {
+				switch (columnIndex) {
+				case 0:
+					return editPart.getClass().getSimpleName();
+				case 1:
+					if (model instanceof NamedElement) {
+						return UMLLabelInternationalization.getInstance().getLabel((NamedElement) model);
+					}
+					return "not a named element";
+				case 2:
+					return figure.getClass().getSimpleName();
+				case 3:
+					return figure.getBounds().toString();
 				}
-				return "not a named element";
-			case 2:
-				return figure.getClass().getSimpleName();
-			case 3:
-				return figure.getBounds().toString();
 			}
 		}
 		return "cannot display it: " + element;