public boolean step() throws SyntaxError {
Note note = diagram.getDataProvider().getNote();
if (note != null) {
freeNoteNumber = Math.max(freeNoteNumber, note.getNumber() + 1);
diagram.getPaintDevice().addSequenceElement(note);
notes.add(note);
closeNote(note.getLocation().getName());
diagram.getFragmentManager().openFragments();
diagram.getPaintDevice().announce(note.getHeight());
note.setTop(diagram.getVerticalPosition());
if (note.isConsuming()) {
diagram.extendLifelines(note.getHeight());
} else {
pendingNotes.put(note.getLocation().getName(), note);
}
if (diagram.getDataProvider().getState() != null) {
diagram.addToStateMap(note, diagram.getDataProvider().getState());
}
diagram.getFragmentManager().clearLabels();
return true;
}
Pair<Lifeline, Integer> eventAssoc = diagram.getDataProvider().getEventAssociation();
if (eventAssoc != null) {
associateEvent(eventAssoc.getFirst(), eventAssoc.getSecond());
return true;
}
return false;
}
public void computeArrowAssociations() {
for (Note description : notes) {
List<Message> msgs = messageAssociation.get(description.getNumber());
if (msgs != null) {
for (Message msg : msgs) {
// This can be a pseudo-message ("_") that returns
// the control flow to an object.
// We just ignore the attempt to uselessly associate a
// note to this.
if (msg.getArrow() != null) {
description.addTarget(msg.getArrow().getAnchor());
}
}
}
List<Pair<Lifeline, Integer>> pairs = eventAssociation.get(description.getNumber());
if (pairs != null) {
for (Pair<Lifeline, Integer> pair : pairs) {
int x = pair.getFirst().getView().getLeft() + pair.getFirst().getView().getWidth() / 2;
Point p = new Point(x, pair.getSecond());
description.addTarget(p);
}
}
}
}