You make it very complicated :-)
final TextField uname = new TextField("username", ...).add(new
AttributeModifier("class", true, new Model() { public void
getObject(Component c) { return uname.isValid() ? "valid" : "invalid";
} });
uname.add(new AjaxFormComponentUpdateBehavior("onblur") {
public void onUpdate(AjaxRequestTarget target) {
if(!uname.isValid()) {
target.appendJavaScript("document.getElementById('" +
uname.getMarkupId() + "').focus();"); }
target.addComponent(uname);
}
});
Should do the trick. Note that this is from the top of my head, so
things might not compile completely.
Martijn
On 1/14/07, Cliff Pereira <[EMAIL PROTECTED]> wrote:
> Hello Mailinglist again,
>
> I tried to implement a simple input field where you can e.g. enter your
> username. Now I want to let the background of the textfield be red while it
> is not valid. And if it's finally valid it should change to green (during
> the input). My problem is, that I always loose the focus on the input field
> on correct input. I guess it has something to do with the addComponent
> method. Here is my code so far....
>
> final FormComponent usernameField;
> usernameField = new TextField("username", new PropertyModel(this,
> "username"));
> usernameField.add(new AttributeModifier("class", true, new
> PropertyModel(this, "usernamevalid")));
> usernameField.setOutputMarkupId(true);
>
> //this works aswell with AjaxFormSubmitBehavior. I do not see the
> difference yet.
> usernameField.add(new
> AjaxFormComponentUpdatingBehavior("onkeyup"){
>
> @Override
> protected void onUpdate(AjaxRequestTarget target) {
> System.out.println(username);
> if (username.equals("Cliff")) {
> usernameField.add(new AttributeModifier("class", true,
> new Model("valid")));
> target.addComponent(usernameField);
> }else {
> if (usernamevalid.equals ("valid")) {
> usernameField.add(new AttributeModifier("class",
> true, new Model("invalid")));
> target.addComponent(usernameField);
> }
> }
> }
>
> });
> add(usernameField);
>
> Is there a way not to loose the focus?
> Thank in advance!
> Cliff
>
> P.S.: usernamevalid could also be a boolean variable. But somehow I feel it
> is not so nice code I produced here...
>
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