/**
* 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
}
}
}
/**
* Builds up the tree showing the layers
*
* @param mapModel The mapModel containing the layerTree
*/
private void buildTree(MapModel mapModel) {
treeGrid.setWidth100();
treeGrid.setHeight100();
treeGrid.setShowHeader(false);
tree = new RefreshableTree();
final TreeNode nodeRoot = new TreeNode("ROOT");
tree.setRoot(nodeRoot); // invisible ROOT node (ROOT node is required)
ClientLayerTreeInfo layerTreeInfo = mapModel.getMapInfo().getLayerTree();
if (layerTreeInfo != null) {
ClientLayerTreeNodeInfo treeNode = layerTreeInfo.getTreeNode();
processNode(treeNode, nodeRoot, tree, mapModel, false);
}
treeGrid.setData(tree);
treeGrid.addLeafClickHandler(this);
treeGrid.addFolderClickHandler(this);
// -- add event listeners to layers
for (Layer<?> layer : mapModel.getLayers()) {
registrations.add(
layer.addLayerChangedHandler(
new LayerChangedHandler() {
public void onLabelChange(LayerLabeledEvent event) {}
public void onVisibleChange(LayerShownEvent event) {
for (TreeNode node : tree.getAllNodes()) {
if (node.getName().equals(event.getLayer().getLabel())) {
if (node instanceof LayerTreeTreeNode) {
((LayerTreeTreeNode) node).updateIcon();
}
}
}
}
}));
}
}