Example usage for com.google.gwt.user.client.ui ValueListBox addValueChangeHandler

Introduction

In this page you can find the example usage for com.google.gwt.user.client.ui ValueListBox addValueChangeHandler.

Prototype

public HandlerRegistration addValueChangeHandler(ValueChangeHandler<T> handler) 

Source Link

Usage

From source file:jdramaix.client.ScrollListSample.java

License:Apache License

private Widget createEffectSelector() {
    ValueListBox<Effect> listBox = new ValueListBox<Effect>(new AbstractRenderer<Effect>() {
        @Override/*from   w  ww . java 2  s  .  c  o  m*/
        public String render(Effect object) {
            return object != null ? object.name().toLowerCase() : "";
        }
    });

    listBox.setValue(currentEffect);
    listBox.setAcceptableValues(Arrays.asList(Effect.values()));
    listBox.addValueChangeHandler(new ValueChangeHandler<Effect>() {
        @Override
        public void onValueChange(ValueChangeEvent<Effect> event) {
            Effect effect = event.getValue();

            if (currentEffect != Effect.NONE) {
                effectContainer.removeClassName(currentEffect.getEffectStyle());
            }

            if (effect != Effect.NONE) {
                effectContainer.addClassName(effect.getEffectStyle());
            }

            currentEffect = effect;
        }
    });
    return listBox;
}

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