SimpleType with custom editor problem

[pones]

I created a simple type to use in my application.
my custom type:

public class TestST extends SimpleType{
  public TestST(){
    this.setName("testType");
    this.setValidators(new IsIntegerValidator());
    //next line breaks the code
    this.setEditorType(new TextItem());
  }
}

creating form from datasource with as field that has our custom type:

//following line is needed to find the type string
new TestST().create();

//datasource with one field that is set to our custom type
DataSource ds = new DataSource();
DataSourceField dsf = new DataSourceField();
dsf.setName("name");
dsf.setTitle("Title");
dsf.setAttribute("type", "testType"); // smartgwt does not have a method for this
ds.setFields(dsf);

//form generated from the DataSource
final DynamicForm df = new DynamicForm();
df.setDataSource(ds);

When i set the editor from inside my SimpleType, i get a runtime error (com.google.gwt.core.client.JavaScriptException: (TypeError): Object expected) when i add the form to the main canvas. Is this a bug or did i do something wrong?
I have the problem with SmartGWT 1.1 and SmartGWT 1.2 SNAPSHOT.
Setting the editor type from inside the datasource works ok but would like to do it from my type.

I also go an other related question:
I want to format the displayed value, in the SmartClient API I'm finding http://www.smartclient.com/docs/6.5.1/a/b/c/go.html#method..SimpleType.normalDisplayFormatter, but it seems that for SmartGWT I will have to work with maskvalidator. Is that true?

[pones]

I got seteditortype to work by setting the Attribute right away to the class name of a form item.

setAttribute("editorType", "SelectItem", false);

but this still doesn't want to work if i use the classname of a custom element. any tips on how to do this?

[levi]

Wow thanks a bunch for that line
//following line is needed to find the type string
new TestST().create();

It finally let the ZipCodeUS example work which is in SmartClient showcase but not in SmartGWT showcase.

Can you explain what it does? Or will I always refer to it as 'the magic code' :)

public void onModuleLoad() {
	RootPanel.get().add(getCanvas());
}


private class ZipCodeUS extends SimpleType {
	public ZipCodeUS() {
		setName("ZipCodeUS");
		RegExpValidator validator = new RegExpValidator();
		validator.setExpression("^\\d{5}(-\\d{4})?$");
		setValidators(validator);
		setInheritsFrom("text");
	}
}

public Canvas getCanvas() {
	
	VLayout layout = new VLayout();
	
	DataSource ds = new DataSource();
	ds.setClientOnly(true);
	
	DataSourceField field = new DataSourceField();
	field.setName("zipCode");
	field.setTitle("Zip Code");
	
	JavaScriptObject jsobject = new ZipCodeUS().create();
	field.setAttribute("type", "ZipCodeUS");
	ds.addField(field);
	
	
	
	field = new DataSourceTextField("tester", "Framework field");
	RegExpValidator validator = new RegExpValidator();
	validator.setExpression("^\\d{5}(-\\d{4})?$");
	field.setValidators(validator);
	ds.addField(field);
	
	
	final DynamicForm form = new DynamicForm();
	form.setDataSource(ds);
	//form.setValidateOnChange(true);
	
	
	Button button = new Button("validate");
	button.addClickHandler(new ClickHandler() {
		
		public void onClick(ClickEvent event) {
			form.validate();
		}
	});
	
	layout.addMember(form);
	layout.addMember(button);
			
	
	return layout;
}