javascript in ds.xml

[jay.l.fisher]

I seem to remember seeing a way to embed javascript in the data source ds.xml files but can't seem to find it any longer. In my particular case, I have a field that I would like to set a ShowIfCondition on. But rather than do that in code I want to put the condition in the ds.xml file itself. I'm using a reusable component with the data source and don't want to have to put custom code in it to deal with this field. The ShowIfCondition is pretty simple. In SmartGWT code I would do something like

FormItem fi = new FormItem();
fi.setShowIfCondition(new FormItemIfFunction() {

  @Override
  public boolean execute(FormItem item, Object value, DynamicForm form)   
  {
    return IPGui.isFinanceSystemInstalled;
  }

});

Can I put the same sort of thing in the datasource.ds.xml file.

[Isomorphic]

You can put JavaScript expressions for showIf into the DataSource XML file, but not Java. It doesn't go through the GWT compiler.

[jay.l.fisher]

Thanks. But how? Can you provide an example of a ds.xml that has a simple showIf condition?

[Isomorphic]

<field name="discount" showIf="values.quantity > 4"/>

Just to clarify, it's a bit of a hack to do this in SGWT, and you'd basically be referring to the SmartClient Reference for what's available to you in the showIf expression.

[jay.l.fisher]

Is there a better way to do it in SGWT? Since I'm using a generic UI component and just passing it a different datasource each time, I'm trying to avoid coding something specific for this one field.

[Isomorphic]

Subclass the UI components in question and make it aware of this field's special behavior.

[csillag]

<field name="discount" showIf="values.quantity > 4"/>

Just to clarify, it's a bit of a hack to do this in SGWT, and you'd basically be referring to the SmartClient Reference for what's available to you in the showIf expression.

I am trying to do this (ie. selectively hide some fields in a form), but I get "(ReferenceError): values is not defined" when binding the same DataSource to a ListGrid.

This (kind of) makes sense, since according to the SmartClient Reference, ListGrid.showIf does not have a 'values' parameter; only formItem.showIf has it.

Is there a way apply a showIf condition that only applies for DynamicForms, but does not apply to ListGrids?

Thank you for your help:

Csillag

[csillag]

Is there a way apply a showIf condition that only applies for DynamicForms, but does not apply to ListGrids?

For now, I just started using a new attribute "formShowIf", add when I find one of these on the client side (in my subclass of DynamicForm), I automatically apply it to the form items.

So it works all right now.