private void createConnector(ITreeElement from, ITreeElement to, int connectorType) {
int xPos1 = from.getX();
int yPos1 = from.getY();
int xPos2 = to.getX();
int yPos2 = to.getY();
Point begin = new Point(0, 0);
Point end = new Point(0, 0);
int mode = Connector.HORIZONTAL;
// connect horizontal if x offset is equal
int sy1 = height / 2, sy2 = height / 2;
if (yPos2 > yPos1) {
sy1 = height;
sy2 = 0;
} else if (yPos2 < yPos1) {
sy1 = 0;
sy2 = height;
}
int sx1 = width / 2, sx2 = width / 2;
if (xPos2 > xPos1) {
sx1 = width;
sx2 = 0;
}
if (xPos2 < xPos1) {
sx1 = 0;
sx2 = width;
}
begin.x = BORDER + xPos1 * (hspacing + width) + sx1;
begin.y = BORDER + yPos1 * (vspacing + height) + sy1;
end.x = BORDER + xPos2 * (hspacing + width) + sx2;
end.y = BORDER + yPos2 * (vspacing + height) + sy2;
int dX = end.x - begin.x;
int dY = end.y - begin.y;
int arrowLength = (int) Math.sqrt((dX * dX) + (dY * dY));
if (arrowLength > 0) {
if (mode == Connector.RIGHT) {
ConnectArrow arrow = new ConnectArrow(begin, end);
connectors.addConnectArrow(arrow);
} else {
ConnectArrow arrow = new ConnectArrow(end, begin);
connectors.addConnectArrow(arrow);
}
} else {
VersionTreePlugin.log(
IStatus.ERROR, "Attempt to draw a line between the same begin and end points.");
return;
}
}
public void drawConnectors(ITreeElement node) {
for (ITreeElement child : node.getChildren()) {
if (child instanceof IRevision) {
createConnector(node, child, MergePoint.INITIAL);
for (MergePoint mergeToPoint : ((IRevision) child).getMergeToRevisions()) {
IRevision mergeToRevision = mergeToPoint.getMergeRevision();
for (String brTo : mergeToRevision.getBranchTags()) {
if (isBranchVisible(brTo)) {
createConnector(child, mergeToRevision, MergePoint.MERGE);
break;
}
}
}
drawConnectors(child);
} else if (child instanceof IBranch) {
IBranch childBranch = (IBranch) child;
if ((!childBranch.isEmpty() || this.getTreeViewConfig().drawEmptyBranches())
&& isBranchVisible(childBranch.getName())) {
// case when parent is dead revision and child element is branch
if (!(node instanceof IRevision && ((IRevision) node).getLogEntry().isDeletion())) {
createConnector(node, child, MergePoint.INITIAL);
}
drawConnectors(child);
}
}
}
}