Add custom textbox validation from java

asked 2016-06-07 22:34:58 +0800

jvilcayp
3 ● 1

updated 2016-06-08 19:23:22 +0800

Hello, i am trying to add a validation in java depending on the values from the back end.

For example, if the field's "type" value is 1, then i want the field "identity" to accept numbers only, otherwise, ot can hold any letter. I've tried to add an attribute to the field in my backend like:

((Textbox) identity).setAttribute("onKeyDown", "/*some js here to allow numbers only*/");

but it does not work.

By the way, this event fires on a "onChange" method from a combobox.

Thanks.

[Edit] Added some sample code

public void onChangeSelect (@ContextParam(ContextType.VIEW) Component view) {
    Component txtNumCI = view.query("#id");
    if (param == 1) {
        ((Textbox) txtNumCI).setMaxlength(8);
    } else {
        ((Textbox) txtNumCI).setMaxlength(11);
    }
}

So, when combobox "type" changes and sets the param value to 1 or 0 (simplified), then maxlength is changed as in sample code, but it should also validate if the value is numbers only (when param = 1) or alphanumeric otherwise.