private void selectAndExpandRootNode(DataArrivedEvent event) {
// first event contains parent node that is root node of TreeGrid
// and it is a synthetic node without attributes
TreeNode parentNode = event.getParentNode();
Tree tree = treeSelector.getTree();
TreeNode[] children = tree.getChildren(parentNode);
if (children.length > 0 && children[0].getAttribute(RelationDataSource.FIELD_PARENT) == null) {
// select real root node and expand it
TreeNode realRootNode = children[0];
treeSelector.selectRecord(realRootNode);
tree.openFolder(realRootNode);
}
}
/**
* Processes a treeNode (add it to the TreeGrid)
*
* @param treeNode The treeNode to process
* @param nodeRoot The root node to which the treeNode has te be added
* @param tree The tree to which the node has to be added
* @param mapModel map model
* @param refresh True if the tree is refreshed (causing it to keep its expanded state)
*/
private void processNode(
final ClientLayerTreeNodeInfo treeNode,
final TreeNode nodeRoot,
final Tree tree,
final MapModel mapModel,
final boolean refresh) {
if (null != treeNode) {
String treeNodeLabel = treeNode.getLabel();
final TreeNode node = new TreeNode(treeNodeLabel);
tree.add(node, nodeRoot);
// (final leafs)
for (ClientLayerInfo info : treeNode.getLayers()) {
Layer<?> layer = mapModel.getLayer(info.getId());
tree.add(new LayerTreeTreeNode(this.tree, layer), node);
}
// treeNodes
List<ClientLayerTreeNodeInfo> children = treeNode.getTreeNodes();
for (ClientLayerTreeNodeInfo newNode : children) {
processNode(newNode, node, tree, mapModel, refresh);
}
// expand tree nodes
// when not refreshing expand them like configured
// when refreshing expand them as before the refresh
boolean isTreeNodeExpanded = treeNode.isExpanded();
if (!refresh) {
if (isTreeNodeExpanded) {
tree.openFolder(node);
}
} else {
// TODO close previously opened tree nodes, close others
}
}
}