Vaadin 7: Detect Enter Key in a TextField

Vaadin 7: Detect Enter Key in a TextField

This can be easily achieved just by adding a shortcutlistener whenever the TextField gets the focus and remove it when it blurs. From an IOC perspective wrapping the TextField would most probably result in less rework than extending the TextField:

For example:

TextField myTextField = new TextField("A text field");
myTextField.setImmediate(true);
OnEnterKeyHandler onEnterHandler=new OnEnterKeyHandler(){
            @Override
            public void onEnterKeyPressed() {
                Notification.show("Voight Kampff Test",
                    Notification.Type.HUMANIZED_MESSAGE);
            }
        };
onEnterHandler.installOn(myTextField);

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And the code for OnEnterKeyHandler is:


import com.vaadin.event.FieldEvents;
import com.vaadin.event.ShortcutAction;
import com.vaadin.event.ShortcutListener;
import com.vaadin.ui.TextField;


public abstract class OnEnterKeyHandler {

     final ShortcutListener enterShortCut = new ShortcutListener(
                "EnterOnTextAreaShorcut", ShortcutAction.KeyCode.ENTER, null) {
                    @Override
                    public void handleAction(Object sender, Object target) {
                        onEnterKeyPressed();
                    }
                };

     public void installOn(final TextField component)
     {
        component.addFocusListener(
                new FieldEvents.FocusListener() {

                    @Override
                    public void focus(FieldEvents.FocusEvent event
                    ) {
                        component.addShortcutListener(enterShortCut);
                    }

                }
        );

        component.addBlurListener(
                new FieldEvents.BlurListener() {

                    @Override
                    public void blur(FieldEvents.BlurEvent event
                    ) {
                        component.removeShortcutListener(enterShortCut);
                    }

                }
        );
     }

     public abstract void onEnterKeyPressed();

}

Enjoy at your own risk.