Tree setIsFolderProperty method does not work

[msimun]

Hi,
i use Smartgwt 3.0. Im working on a Tree that shows directory structure. As i know, which node is Folder and which is not i wanted to reduce the requests by setting setIsFolderProperty. This unfortunately doesnt work for me. I've also changed the property defaultIsFolder but also no change. This is how im using it:

private static class FilePickerWindow extends Window {
		private static final RestDataSource directoryDataSource;

		static {
			directoryDataSource = new RestDataSource();
			directoryDataSource.setID("directoryBrowserDataSource");
			directoryDataSource.setDropExtraFields(false);
			directoryDataSource.setDropUnknownCriteria(false);
			directoryDataSource.setDataProtocol(DSProtocol.GETPARAMS);
			directoryDataSource.setDataFormat(DSDataFormat.JSON);
			DataSourceField name = new DataSourceTextField("name");
			DataSourceField parent = new DataSourceTextField("parent");
			DataSourceField path = new DataSourceTextField("path");
			DataSourceField directory = new DataSourceBooleanField("dir");
			parent.setForeignKey("path");
			path.setPrimaryKey(true);
			directoryDataSource.setFields(name, parent, path, directory);
			directoryDataSource.setDataURL(GWT.getHostPageBaseURL() + "directoryBrowser");
		}

		private String openingNodeId;

		private FilePickerWindow() {
			Tree tree = new Tree();
			tree.setModelType(TreeModelType.CHILDREN);
			tree.setIdField("name");
			tree.setNameProperty("name");
			tree.setIsFolderProperty("dir");
			tree.setDefaultIsFolder(false);
			final TreeGrid treeGrid = new TreeGrid();
			treeGrid.setData(tree);
			treeGrid.setDataSource(directoryDataSource);
			treeGrid.setLoadDataOnDemand(true);
			treeGrid.setKeepParentsOnFilter(true);
			treeGrid.setFields(new TreeGridField("name"), new TreeGridField("path"), new TreeGridField("dir"));
			treeGrid.setAutoFetchData(true);
			addItem(treeGrid);
			setWidth(300);
			setHeight(400);
			setCanDragResize(true);
		}
	}

Im sendig data from server in format: {"response":{"size":1,"data":[{"name":"tmp","path":"/tmp","dir":true}]}}

In the TreeGrid i can see the dir property but every node is displayed as a Folder.

Thanks in advance.

[Isomorphic]

Looks like you're customizing a tree then applying it via 'setData()'.
This denotes the client-side tree of data to display and would have no effect on the data retrieved when you then actually perform a fetch.
Instead you'd want to use 'setDataProperties()' - this acts as a template set of properties applied to the special dataSource-aware tree that gets generated when the fetch completes.

Let us know if you still have problems with it after switching to that API.

[msimun]

Thanks, that did the trick. But now im trying to set setSortFoldersBeforeLeaves(true);

I've tried it both on tree and treeGrid but it does not work. The directories are not listed as first. What could be the problem?

Thank you in advance

[Isomorphic]

Have you set separateFolders?