private void layoutElements() {
// System.out.println();
for (String id : this.orderedIds) {
// System.out.println(id);
BPMNElement currentElement = (BPMNElement) this.diagram.getElement(id);
List<LayoutingElement> precedingElements = currentElement.getPrecedingElements();
GridContext context = getContextByElement(currentElement);
Cell<BPMNElement> cellOfElement = null;
cellOfElement = placeElement(currentElement, precedingElements, context);
boolean comesFromOtherGrid =
precedingElements.size() == 1
&& precedingElements.get(0).getParent() != currentElement.getParent();
if (!currentElement.isJoin() && !comesFromOtherGrid && cellOfElement.getPrevCell() != null) {
// there is an edge hitting us left, so lets forbid
// interleaving to use the left cell, if it's empty
cellOfElement.getPrevCell().setPackable(false);
}
if (currentElement.isSplit()) {
prelayoutSuccessors(currentElement, context, cellOfElement);
}
if (BPMNType.isAActivity(currentElement.getType())) {
// search for attached events
for (LayoutingElement e : currentElement.getOutgoingLinks()) {
if (BPMNType.isACatchingIntermediateEvent(e.getType())) {
context.grid.setCellOfItem((BPMNElement) e, cellOfElement);
}
}
}
}
}
/**
* @param currentElement
* @param context
* @param cellOfElement
*/
private void prelayoutSuccessors(
BPMNElement currentElement, GridContext context, Cell<BPMNElement> cellOfElement) {
// preLayout following Elements
Cell<BPMNElement> baseCell = cellOfElement.after();
Cell<BPMNElement> topCell = baseCell;
List<LayoutingElement> followingElements = currentElement.getFollowingElements();
if (BPMNType.isAActivity(currentElement.getType())) {
// special case for docked events
List<BPMNElement> dockedEventFollowers = new LinkedList<BPMNElement>();
for (LayoutingElement el : currentElement.getOutgoingLinks()) {
BPMNElement element = (BPMNElement) el;
if (element.isADockedIntermediateEvent()) {
for (LayoutingElement follower : element.getFollowingElements()) {
dockedEventFollowers.add((BPMNElement) follower);
}
}
}
// to avoid crossing edges if there is more than one
// docked event
Collections.reverse(dockedEventFollowers);
// put them under the task
Cell<BPMNElement> insertCell = baseCell;
for (BPMNElement dockedEventFollower : dockedEventFollowers) {
Cell<BPMNElement> oldCell = context.grid.getCellOfItem(dockedEventFollower);
if (oldCell != null) {
if (oldCell.getValue() == dockedEventFollower) {
continue; // Bug-Workaround: Don't prelayout
// layouted elements;
}
}
insertCell.getParent().insertRowBeneath();
insertCell = insertCell.beneath();
context.grid.setCellOfItem(dockedEventFollower, insertCell); // prelayout
}
// remove them from the following processing
followingElements.removeAll(dockedEventFollowers);
}
// heuristic for text- & data-objects: put them to the top
List<BPMNElement> textAnnotations = new LinkedList<BPMNElement>();
List<BPMNElement> dataObjects = new LinkedList<BPMNElement>();
for (LayoutingElement el : followingElements) {
BPMNElement e = (BPMNElement) el;
if (e.getType().equals(BPMNType.TextAnnotation)) {
textAnnotations.add(e);
} else if (e.getType().equals(BPMNType.DataObject)) {
dataObjects.add(e);
}
}
followingElements.removeAll(textAnnotations);
followingElements.removeAll(dataObjects);
// add them at the front
followingElements.addAll(0, dataObjects);
followingElements.addAll(0, textAnnotations);
// heuristic for direct connection to join
BPMNElement directJoin = null;
for (LayoutingElement possibleJoin : followingElements) {
if (possibleJoin.isJoin()) {
directJoin = (BPMNElement) possibleJoin;
}
}
if (directJoin != null) {
// put in the middle
followingElements.remove(directJoin);
int position = (followingElements.size() / 2);
followingElements.add(position, directJoin);
}
// normal preLayout following Elements
int follow = 0;
for (LayoutingElement newElem : followingElements) {
if (newElem.getParent() == currentElement.getParent()) {
follow++;
}
}
for (int i = 0; i < follow / 2; i++) {
topCell.getParent().insertRowAbove();
baseCell.getParent().insertRowBeneath();
topCell = topCell.above();
}
for (LayoutingElement newElem : followingElements) {
if (newElem.getParent() != currentElement.getParent()) {
continue;
}
context.grid.setCellOfItem((BPMNElement) newElem, topCell); // prelayout
topCell = topCell.beneath();
if (topCell == baseCell && follow % 2 == 0) {
// skip baseCell if an even amount of elements is
// following
topCell = topCell.beneath();
}
}
}