/** Navigates to the source or target of the currently focused ConnectionEditPart. */
void navigateOutOfConnection(KeyEvent event) {
GraphicalEditPart cached = getCachedNode();
ConnectionEditPart conn = (ConnectionEditPart) getFocusEntityPart();
if (cached != null && (cached == conn.getSource() || cached == conn.getTarget()))
navigateTo(cached, event);
else navigateTo(conn.getSource(), event);
}
@Override
public ConnectionAnchor getTargetConnectionAnchor(ConnectionEditPart connection) {
// handle reconnections
if (connection != null) {
if (connection.getSource() != null && connection.getTarget() != null) {
if (connection.getSource().equals(connection.getTarget())) {
return new ReconnectionTargetAnchor(getFigure());
}
}
}
if (((WorkflowNode) getModel())
.getComponentDescription()
.getComponentInstallation()
.getComponentRevision()
.getComponentInterface()
.getShape()
== ComponentShape.CIRCLE) {
return new EllipseAnchor(getFigure());
} else {
return new ChopboxAnchor(getFigure());
}
}
/**
* Figure out if a cyclic dependency will arise if target connection edit part is connected to the
* source connection edit part.
*
* @param targetCEP the target connection edit part
* @param sourceCEP the source connection edit part
* @param checkSourceAndTargetEditParts check both the source and taret edit parts for cyclic
* dependencies
* @param doNotCheckSourceEditPart (if checkSourceAndTargetEditParts is false) check only the
* target edit part if true, otherwise check only the source edit part
* @return true if a cyclic dependency would be create when targetCEP and sourceCEP were to be
* connected, false otherwise.
*/
private boolean isCyclicConnectionRequest(
org.eclipse.gef.ConnectionEditPart targetCEP,
org.eclipse.gef.ConnectionEditPart sourceCEP,
boolean checkSourceAndTargetEditParts,
boolean doNotCheckSourceEditPart) {
if (targetCEP == null || sourceCEP == null) return false;
if (sourceCEP == targetCEP) return true;
// first, do a cyclic check on source and target connections
// of the source connection itself.
// (as every connection is also a node).
HashSet set = new HashSet();
getSourceAndTargetConnections(set, sourceCEP);
if (set.contains(targetCEP.getFigure())) return true;
// now do the cyclic check on the source and target of the source connection...
EditPart sourceEP = sourceCEP.getSource(), targetEP = sourceCEP.getTarget();
if ((sourceEP == targetCEP) || (targetEP == targetCEP)) {
return true;
} else {
if (!checkSourceAndTargetEditParts && doNotCheckSourceEditPart) {
// .
} else if (sourceEP instanceof org.eclipse.gef.ConnectionEditPart
&& isCyclicConnectionRequest(
targetCEP,
(org.eclipse.gef.ConnectionEditPart) sourceEP,
true,
doNotCheckSourceEditPart)) return true;
if (!checkSourceAndTargetEditParts && !doNotCheckSourceEditPart) {
// .
} else if (targetEP instanceof org.eclipse.gef.ConnectionEditPart
&& isCyclicConnectionRequest(
targetCEP,
(org.eclipse.gef.ConnectionEditPart) targetEP,
true,
doNotCheckSourceEditPart)) return true;
}
return false;
}
/** This method navigates through connections based on the keys pressed. */
void navigateConnections(KeyEvent event) {
GraphicalEditPart focus = (GraphicalEditPart) getFocusEntityPart();
ConnectionEditPart current = null;
GraphicalEditPart node = getCachedNode();
if (focus instanceof ConnectionEditPart) {
current = (ConnectionEditPart) focus;
if (node == null || (node != current.getSource() && node != current.getTarget())) {
node = (GraphicalEditPart) current.getSource();
counter = 0;
}
} else {
node = focus;
}
setCachedNode(node);
boolean forward = event.character == '/' || event.character == '?';
ConnectionEditPart next = findConnection(node, current, forward);
navigateTo(next, event);
}
/** Gets the remote figure. */
private void updateRemoteFig() {
// CreateConnectionRequest needs to refresh fRemoteFig each time
switch (fAnchorType) {
case CRCONREQ_SRC:
fRemoteFig =
(((CreateConnectionRequest) fRequest).getTargetEditPart() != null)
? ((GraphicalEditPart) ((CreateConnectionRequest) fRequest).getTargetEditPart())
.getFigure()
: null;
break;
case CRCONREQ_TGT:
fRemoteFig =
(((CreateConnectionRequest) fRequest).getSourceEditPart() != null)
? ((GraphicalEditPart) ((CreateConnectionRequest) fRequest).getSourceEditPart())
.getFigure()
: null;
break;
}
// The other cases can be cached
if (fRemoteFig != null) {
return;
}
switch (fAnchorType) {
case CONNECTION_SRC:
fRemoteFig = ((GraphicalEditPart) fAnchorConnection.getTarget()).getFigure();
break;
case CONNECTION_TGT:
fRemoteFig = ((GraphicalEditPart) fAnchorConnection.getSource()).getFigure();
break;
case RECONREQ_SRC:
fRemoteFig =
(((ReconnectRequest) fRequest).getConnectionEditPart().getTarget() != null)
? ((GraphicalEditPart)
((ReconnectRequest) fRequest).getConnectionEditPart().getTarget())
.getFigure()
: null;
if (((Connection) ((ReconnectRequest) fRequest).getConnectionEditPart().getFigure())
.getTargetAnchor()
instanceof OrthogonalAnchor)
((OrthogonalAnchor)
((Connection) ((ReconnectRequest) fRequest).getConnectionEditPart().getFigure())
.getTargetAnchor())
.setAlternateRemoteFig(getOwner());
break;
case RECONREQ_TGT:
fRemoteFig =
(((ReconnectRequest) fRequest).getConnectionEditPart().getSource() != null)
? ((GraphicalEditPart)
((ReconnectRequest) fRequest).getConnectionEditPart().getSource())
.getFigure()
: null;
if (((Connection) ((ReconnectRequest) fRequest).getConnectionEditPart().getFigure())
.getSourceAnchor()
instanceof OrthogonalAnchor)
((OrthogonalAnchor)
((Connection) ((ReconnectRequest) fRequest).getConnectionEditPart().getFigure())
.getSourceAnchor())
.setAlternateRemoteFig(getOwner());
break;
}
}
