State automata: Allow the creation of transitions to parent states

Issue-Ref: 3973
Issue-Url: https://af3-developer.fortiss.org/issues/3973



Signed-off-by: Tiziano Munaro <munaro@fortiss.org>

org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/fx/controller/.ratings

 ContextMenuUtil.java 405387151d45b09dffb3b6ba44f980313c8edcaf GREEN
-CurvedLinkLayoutedContentAnchorangeController.java 6d2b64c3d6c813ac001b1500ed0529ad6e561aaf GREEN
+CurvedLinkLayoutedContentAnchorangeController.java a206a297cfc51281b31d02c751c3090b49fc7341 YELLOW
+CurvedLinkLayoutedDiagramAnchorangeController.java 47122da96c51bc7517160ff3d9c735f81e0d082b YELLOW
 EObjectDiagramController.java 2b253941592ee25ead95223470f983f23ef9776f GREEN
 EObjectEllipticResizableContentControllerBase.java 7c862a03b97d2f2cfdcc2fcee7434de2e1e257d2 GREEN
 EObjectModelChangeProvider.java f4b60cebb088a5c81ca92a41614e1a5d40030502 GREEN

org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/fx/controller/CurvedLinkLayoutedContentAnchorangeController.java

@@ -17,8 +17,9 @@ package org.fortiss.tooling.base.ui.editor.fx.controller;
 
 import static org.fortiss.tooling.base.ui.utils.LayoutDataUIUtils.addConnectionPoint;
 
-import org.fortiss.tooling.base.model.base.EntryConnectorBase;
-import org.fortiss.tooling.base.model.base.ExitConnectorBase;
+import org.eclipse.emf.common.util.BasicEList;
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.emf.ecore.EObject;
 import org.fortiss.tooling.base.model.base.HierarchicElementBase;
 import org.fortiss.tooling.base.model.element.IConnection;
 import org.fortiss.tooling.base.model.element.IConnector;
@@ -43,7 +44,7 @@ public class CurvedLinkLayoutedContentAnchorangeController<T extends IConnector
 	}
 
 	/** {@inheritDoc} */
-	@SuppressWarnings("unchecked")
+	// TODO(3978): Resolve code duplication in the link-method of link visuals
 	@Override
 	protected void link(IMVCBundle startBundle, DiagramCoordinate startLocation,
 			IMVCBundle endBundle, DiagramCoordinate endLocation) {
@@ -53,18 +54,22 @@ public class CurvedLinkLayoutedContentAnchorangeController<T extends IConnector
 			return;
 		}
 
-		// Create the connection
+		// The call to `super.link` (see next lines) does not return a reference to the
+		// newly created connection. However, as it is needed in order to add the handles
+		// we get it by comparing the root element's connections before and after the
+		// creation of the new link:
+		// 1) Here we get the list of existing connections
+		EList<IConnection> connectionsBefore = new BasicEList<IConnection>(
+				((HierarchicElementBase)(EObject)getViewer().getRootElement()).getConnections());
+		// 2) Here we create the new connection
 		super.link(startBundle, startLocation, endBundle, endLocation);
-
-		// Fetch newly created connection by comparing incoming and outgoing connections of the
-		// given connectors. As only one connection is allowed between a pair of connectors, this
-		// 'findFirst' is safe.
-		T startConnector = (T)(startBundle.getModel() instanceof ExitConnectorBase
-				? startBundle.getModel() : endBundle.getModel());
-		T endConnector = (T)(endBundle.getModel() instanceof EntryConnectorBase
-				? endBundle.getModel() : startBundle.getModel());
-		IConnection connection = startConnector.getOutgoing().stream()
-				.filter(segment -> endConnector.getIncoming().contains(segment)).findFirst().get();
+		// 3) Here we get the updated list of connections
+		EList<IConnection> connectionsAfter = new BasicEList<IConnection>(
+				((HierarchicElementBase)(EObject)getViewer().getRootElement()).getConnections());
+		// 4) We remove all existing ones
+		connectionsAfter.removeAll(connectionsBefore);
+		// 5) And we are left with the newly added one.
+		IConnection connection = connectionsAfter.stream().findFirst().get();
 
 		// Create handles
 		DiagramCoordinate startPosition =

org.fortiss.tooling.base.ui/src/org/fortiss/tooling/base/ui/editor/fx/controller/CurvedLinkLayoutedDiagramAnchorangeController.java

+/*-------------------------------------------------------------------------+
+| Copyright 2020 fortiss GmbH                                              |
+|                                                                          |
+| Licensed under the Apache License, Version 2.0 (the "License");          |
+| you may not use this file except in compliance with the License.         |
+| You may obtain a copy of the License at                                  |
+|                                                                          |
+|    http://www.apache.org/licenses/LICENSE-2.0                            |
+|                                                                          |
+| Unless required by applicable law or agreed to in writing, software      |
+| distributed under the License is distributed on an "AS IS" BASIS,        |
+| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
+| See the License for the specific language governing permissions and      |
+| limitations under the License.                                           |
++--------------------------------------------------------------------------*/
+package org.fortiss.tooling.base.ui.editor.fx.controller;
+
+import static org.fortiss.tooling.base.ui.utils.LayoutDataUIUtils.addConnectionPoint;
+
+import org.eclipse.emf.common.util.BasicEList;
+import org.eclipse.emf.common.util.EList;
+import org.eclipse.emf.ecore.EObject;
+import org.fortiss.tooling.base.model.base.HierarchicElementBase;
+import org.fortiss.tooling.base.model.element.IConnection;
+import org.fortiss.tooling.base.model.element.IConnector;
+import org.fortiss.tooling.base.model.layout.ILayoutedModelElement;
+import org.fortiss.tooling.common.ui.javafx.lwfxef.DiagramCoordinate;
+import org.fortiss.tooling.common.ui.javafx.lwfxef.mvc.IMVCBundle;
+
+/**
+ * {@link LayoutedDiagramAnchorageController} for diagrams with curved links.
+ * 
+ * @author munaro
+ */
+public class CurvedLinkLayoutedDiagramAnchorangeController<T extends IConnector & ILayoutedModelElement>
+		extends LayoutedDiagramAnchorageController<T> {
+
+	/** Constructor. */
+	public CurvedLinkLayoutedDiagramAnchorangeController(IMVCBundle mvcb, Class<T> modelType) {
+		super(mvcb, modelType);
+		// TODO Auto-generated constructor stub
+	}
+
+	/** {@inheritDoc} */
+	// TODO(3978): Resolve code duplication in the link-method of link visuals
+	@Override
+	protected void link(IMVCBundle startBundle, DiagramCoordinate startLocation,
+			IMVCBundle endBundle, DiagramCoordinate endLocation) {
+		// Disable direct links between hierarchic element bases
+		if(startBundle.getModel() instanceof HierarchicElementBase ||
+				endBundle.getModel() instanceof HierarchicElementBase) {
+			return;
+		}
+
+		// The call to `super.link` (see next lines) does not return a reference to the
+		// newly created connection. However, as it is needed in order to add the handles
+		// we get it by comparing the root element's connections before and after the
+		// creation of the new link:
+		// 1) Here we get the list of existing connections
+		EList<IConnection> connectionsBefore = new BasicEList<IConnection>(
+				((HierarchicElementBase)(EObject)getViewer().getRootElement()).getConnections());
+		// 2) Here we create the new connection
+		super.link(startBundle, startLocation, endBundle, endLocation);
+		// 3) Here we get the updated list of connections
+		EList<IConnection> connectionsAfter = new BasicEList<IConnection>(
+				((HierarchicElementBase)(EObject)getViewer().getRootElement()).getConnections());
+		// 4) We remove all existing ones
+		connectionsAfter.removeAll(connectionsBefore);
+		// 5) And we are left with the newly added one.
+		IConnection connection = connectionsAfter.stream().findFirst().get();
+
+		// Create handles
+		DiagramCoordinate startPosition =
+				new DiagramCoordinate(startBundle.getVisual().getCurrentBounds().getMaxX(),
+						startBundle.getVisual().getCurrentBounds().getMaxY());
+		DiagramCoordinate endPosition =
+				new DiagramCoordinate(endBundle.getVisual().getCurrentBounds().getMaxX(),
+						endBundle.getVisual().getCurrentBounds().getMaxY());
+		DiagramCoordinate middle =
+				new DiagramCoordinate((startPosition.getX() + endPosition.getX()) / 2,
+						(startPosition.getY() + endPosition.getY()) / 2);
+		addConnectionPoint((ILayoutedModelElement)connection, 0, (int)middle.getX(),
+				(int)middle.getY());
+		addConnectionPoint((ILayoutedModelElement)connection, 1, (int)middle.getX(),
+				(int)middle.getY());
+	}
+}