/**
* Adjusts the Y coordinate to prevent node overlap.
*
* <p>Here is a situation where this method is required. <code>EIP_____ EIP 1 ______ edpt
* \____ EIP 2 ______ edpt</code> With the single algorithm, EIP 1 and 2 will overlap
* vertically.
*/
private void adjustYCoordinates() {
// 1st pass: correct the padding and suppress overlap
List<EipNode> zeroNodes = new ArrayList<EipNode>();
Map<AbstractNode, Integer> nodeToNewOffset = new HashMap<AbstractNode, Integer>();
for (ArrayList<AbstractNode> nodes : this.levelToNodes.values()) {
int maxY = 0;
for (AbstractNode node : nodes) {
// Find the original Y
int y = this.nodeToCoY.get(node);
// The initial offset is inherited from the parent
int offset = 0;
if (node.getIncomingConnection() != null)
offset = nodeToNewOffset.get(node.getIncomingConnection().getSource());
// Prevent overlap
if (y <= maxY) offset = maxY - y;
// Make sure there is the minimal vertical padding
if (maxY != 0 && y - maxY < GRID_PADDING_Y) offset += GRID_PADDING_Y - y + maxY;
// Store the new Y
y += offset;
nodeToNewOffset.put(node, offset);
this.nodeToCoY.put(node, y);
// Update the maximal Y for this level
maxY = y + getFigureSize(node).height;
// Something for the next pass?
if (offset == 0 && node instanceof EipNode) zeroNodes.add((EipNode) node);
}
}
// 2nd pass: there may be nodes that were not translated (e.g. the root node).
// This pass moves them at the middle-Y...
for (EipNode eip : zeroNodes) {
int y = computeCenteredYCoordinate(eip, getFigureSize(eip));
this.nodeToCoY.put(eip, y);
}
}
/**
* @param node a node
* @return the size of the figure associated to this node
*/
private Dimension getFigureSize(AbstractNode node) {
IFigure fig = this.nodeToFigure.get(node);
int width, height;
if (fig != null) {
width = fig.getSize().width;
height = fig.getSize().height;
} else {
width = GRID_CELL_DEFAULT_WIDTH;
;
height = GRID_CELL_DEFAULT_HEIGHT;
PetalsEipPlugin.log(
"No figure was found for the node "
+ node.getId()
+ " (EIP chain: "
+ node.getEipChain().getTitle()
+ " ).",
IStatus.ERROR);
}
return new Dimension(width, height);
}