getForm is null inside FormItem

[levi]

Hi,

I'm trying to do what's described in this post, that is setting the Form's value on a custom FormItem so I can call this value via Form.getValues().

However, the reference to getForm() inside the FormItem is null.

Repro case:
SmartGWT 1.3

private class MyCanvasItem extends CanvasItem {
	private int timesClicked = 0;
	public MyCanvasItem() {
		super();
		Button b = new Button("Click me");
		b.addClickHandler(new ClickHandler() {
			public void onClick(ClickEvent event) {
				timesClicked++;
				DynamicForm form = MyCanvasItem.this.getForm();
				if (form == null) {
					SC.say("Form reference is null :(");
				} else {
					form.setValue(MyCanvasItem.this.getName(), timesClicked);
				}	
			}
		});
		setCanvas(b);
	}
}

private Canvas getFormRefTest() {
	VLayout result = new VLayout();
	
	final DynamicForm form = new DynamicForm();
	TextItem field1 = new TextItem("field1");
	MyCanvasItem field2 = new MyCanvasItem();
	field2.setName("field2");
	field2.setTitle("Field 2");
	
	form.setFields(field1, field2);
	
	Button getValueMap = new Button("Show values");
	getValueMap.addClickHandler(new ClickHandler() {
		public void onClick(ClickEvent event) {
			Map<String, String> map = form.getValues();
			StringBuffer string = new StringBuffer("Form Value Map:<br/>");
			for (String key : map.keySet()) {
				string.append(key).append(": ").append(map.get(key)).append("<br/>");
			}
			SC.say(string.toString());
		}
	});
	
	
	result.setMembers(form, getValueMap);
	return result;
}

[levi]

So what would be the best way to get a reference to the form inside the formitem?
I see there are some ways to do it in SmartClient, but not with SmartGWT.

[justinmiller621]

I'm using SmartGWT 2.0 and having the exact same problem.

I have some FormItem's that I assign to a form via the setFields method, and later, when I try to get their associated form via getForm(), null is returned.

Any help here?

[hsm]

It's too late for guys but may help somebody.
You can get the form in case you've got an event from FormItem like com.smartgwt.client.widgets.form.fields.events.ClickEvent
it has getForm() method which works.

[thebravedave]

Im having the same problem. I want to get the DynamicForm info without having to set up datasource (just get the values and read them client side).
I keep getting null values too when i try to get the values from the form->formitem->value.

Any help?

dave

[sjivan]

This is fixed in SVN.

[levi]

I still get this a lot in FormItems.
both this.getContainerWidget() == null and this.getForm() == null

What works is this (workaround, I feel):
I'm interested in those pointers when I do something.
So when I act on the event and use event.getItem(), then
event.getItem().getContainerWidget()
and event.getItem().getForm() do give me the expected pointers.

E.g:

addDoubleClickHandler(new DoubleClickHandler() {

  public void onDoubleClick(com.smartgwt.client.widgets.form.fields.events.DoubleClickEvent event) {
    FormItem item = event.getItem();
    Canvas notNull1 = item.getContainerWidget();
    DynamicForm notNull2 = item.getForm();
    Canvas isNull1 = MyEditor.this.getContainerWidget();
    DynamicForm isNull2 = MyEditor.this.getForm();

I guess using the event is not that bad, as it should contain the right widgets when using this item in a DynamicForm or when used in a ListGrid.
Still, it's a bit strange that getForm returns null.

[Isomorphic]

If this involves setEditorType, there are special rules (explained in the doc just linked) because the editorType you apply is used to create multiple FormItem instances (it's like a template).