Show treegrid folder icon but not leaf icon

[jlpuffe]

Browser: Firefox 60.1
Smartgwt : Version 6.1p, Built 2017-09-05
GWT: 2.7

I can't seem to figure out how to show the folder icon as a custom icon but hide the leaf icon. Below is latest attempt. I successfully show the folder icon but I can't figure out how to hide the leaf one.

public class MyTreeGrid extends TreeGrid {

protected TreeGridField nodeId = new TreeGridField("id", "Id");
protected TreeGridField rootNode = new TreeGridField("rootValue", "Root");
protected TreeGridField isFolder = new TreeGridField("isFolder", "isFolder");
protected String context;

public MyTreeGrid(String context) {
this.context = context;
buildComponents();
}

protected void buildComponents() {
setHeight100();
setWidth100();
setDataSource(buildDS());
setAutoFetchData(false);
setFields(nodeId, rootNode, isFolder);
nodeId.setHidden(true);
isFolder.setHidden(true);
setSelectionAppearance(SelectionAppearance.CHECKBOX);
setSelectionType(SelectionStyle.SIMPLE);
setOverflow(Overflow.VISIBLE);
setShowRecordComponents(true);
setShowRecordComponentsByCell(true);
setCustomIconProperty("rootIcon");
}

@Override
protected Canvas createRecordComponent(final ListGridRecord record, Integer colNum) {
String fieldName = this.getFieldName(colNum);
if (fieldName.equals("rootValue")) {
Boolean isFolder = record.getAttribute("isFolder");
if (!isFolder) {
setIconSize(1);
setNodeIcon(null);
} else {
return null;
}
} else {
return null;
}
}

protected MyDataSource buildDS() {
return new MyDataSource(context);
}
}

public class MyDataSource extends RestDataSource() {

private String context;

public MyDataSource(String context) {
this.context = context;
setClientOnly(false);
setDataFormat(DSDataFormat.JSON);
setJsonPrefix(""):
setJsonSuffix("");
init();
}

protected void init() {
DataSourceField id = new DataSourceTextField("id", "ID");
id.setPrimaryKey(true);
id.setRequired(true);
id.setDisplayField("value");

DataSourceField parentId = new DataSourceTextField("id", "ID");
parentId.setRootValue("root");

DataSourceField value = DatasourceTextField("value", "Value");
DataSourceBooleanField isFolder = new DataSourceBooleanField("isFolder", "isFolder");
isFolder.setRequired('true");

setFields(id, value, isFolder);

setDataURL("rest/service/findItems");
}
}

my Rest service creates dummy data as follows:

protected List<MyItem> createDummyItems() {
List<MyItem> attr = new ArrayList<MyItem>();

String[] fruits = new String[] {"apple", "orange", "kiwi"}
String[] veggies = new String[] {"salad", "carrot", "onion"}

String parentId = "Fruits";
MyItem root = new MyItem("root", parentId, parentId, true);
attr.add(root);

for (int i=0; i<3; i++) {
String val = fruits[i];
MyItem child = new MyItem(parentId, parentId+val, val, false);
attr.add(child);
}

parentId = "Veggies";
root = new MyItem("root", parentId, parentId, true);
attr.add(root);

for (int i=0; i<3; i++) {
String val = veggies[i];
MyItem child = new MyItem(parentId, parentId+val, val, false);
attr.add(child);
}

return attr;
}

public class MyItem() {
private String rootIcon;
private String value;
private String id;
private String parentId;
private Boolean isFolder;
private String rootValue;

public MyItem(String parentId, String id, String value, boolean isFolder) {
this.parentId = parentId;
this.id = id;
this.value = value;
this.isFolder = isFolder;
if (isFolder) {
rootIcon = "myicon.gif";
} else {
rootIcon = null;
}

}

}

public class MyProject implements EntryPoint {

MyTreeGrid treeGrid = null;
String context;

public void onModuleLoad() {
context = GWT.getHostPageBaseURL();
HLayout mainContainer = new HLayout();
mainContainer.setWidth(800);
mainContainer.setHeight(500);
treeGrid = new MyTreeGrid(context);
mainContainer.addMember(treeGrid);
treeGrid.fetchData();

}

}

[jlpuffe]

I think I figured it out. I just needed to override the following method to the TreeGrid

@Override
protected String getIcon(Record record, boolean defaultState) {
Boolean isFolder = record.getAttributeAsBoolean("isFolder");
if (isFolder) {
return "myicon.gif";
} else {
return null;
}
}