Dynamic change formitem's required

[Isomorphic]

Update: support for modifying formItem.required at runtime has now been fixed in mainline.

[Isomorphic_Paul]

We'll look into why setRequired isn't being reliable offline.
However you should be able to use a RequiredIfValidator to get conditionally required behavior. We have an example of this in the showcase: http://www.smartclient.com/smartgwt/..._conditionally

[levi]

Hi,

I'm setting the required boolean by toggling it a few times on a formitem and call redraw() on the Form. However, the error that the field is required does not come up.

1st item: no setRequired called
2nd item setRequired(false)
3rd item: setRequired(true)


-Press validate (OK)
restart test
-Press toggle, the 2 first ones are bold, the 3rd is not (OK)
-Press Validate, the 2 first ones have no ! icon, the 3rd one is now suddenly bold and does show the ! icon (NOK)
-Press toggle
-Press toggle all 3 are bold (NOK) toggle not working anymore?

	VLayout result = new VLayout();
	
	TextItem item1 = new TextItem();
	item1.setTitle("not set");

TextItem item2 = new TextItem();
item2.setTitle("set not required");
item2.setRequired(false);

TextItem item3 = new TextItem();
item3.setTitle("set required");
item3.setRequired(true);

final DynamicForm form = new DynamicForm();
form.setItems(item1, item2, item3);

Button toggleRequired = new Button("Toggle setRequired");
toggleRequired.addClickHandler(new ClickHandler() {
	
	public void onClick(ClickEvent event) {
		form.clearErrors(true);
		for (FormItem item : form.getFields()) {
			Boolean isRequired = item.getRequired();
			if (isRequired == null) isRequired = false;
			item.setRequired(!isRequired);
		}
		form.redraw(); //tried with mark for redraw as well
	}
});

Button validateValues = new Button("Validate");
validateValues.addClickHandler(new ClickHandler() {
	
	public void onClick(ClickEvent event) {
		form.clearErrors(true);
		if (!form.validate()) {
			Map errors = form.getErrors();
			if (errors != null && !errors.isEmpty()) {
				SC.say("At least one validation error occurred:<br/>" + errors.values().iterator().next().toString());
			} else {
				SC.say("Validation failed without errors");
			}
		}
	}
});


result.addMember(form);
result.addMember(toggleRequired);
result.addMember(validateValues);

return result;

SmartClient Version: SC_SNAPSHOT-2010-09-16/EVAL Deployment (expires 2010.11.15_09.37.00)

[sjivan]

You should use FormItem.setRedrawOnChange(true);

I have added FormItem.redraw() as well for completeness.

Sanjiv

[mihai007]

just a little offtopic: in this way you redraw all the form, souldn't the CheckboxItem have a .redraw() method to avoid refreshing the entire form?

[markao]

Sorry, I found that there isn't the method of check_org.redraw().

But, thank you very much, I use form.redraw() and it works.

Thank you again~

[davidj6]

Have you tried a check_org.redraw() after the setRequired() call in onChanged?

[markao]

Yes, here is my code.

CheckboxItem check_org = new CheckboxItem();
check_org.setRequired(false);
check_org.setShowTitle(false);
check_org.setTitle("Organization:");

check_org.addChangedHandler(new ChangedHandler() {
    public void onChanged(ChangedEvent event) {
	check_org.setRequired(isOrgChecked());
    }
});

private boolean isOrgChecked() {
    Boolean isOrgChecked = (Boolean) check_org.getValue();
    if (isOrgChecked != null && isOrgChecked)
	return true;
    return false;
}

[Isomorphic]

Can you please show your code that isn't working?

[markao]

Hello, I got a problem with the required status of formitem. You know that when a formitem is required non-empty value, its title will be bold.

I got a checkbox, required is false, not checked.
I add a ChangedHandler to it. When it's checked, i set its required true, and when unchecked, i set its required false.
What i want to achieve is that when i check it, it will be bold.

But I get the opposite result. When i check it, it's not bold. When i uncheck it, it becomes bold. I thought the checkbox's required has changed, but need refresh, so I try to redraw the form, but no effects.

So help me plz. Thank you very much.