cz.zcu.pia.social.network.frontend.handlers.OnEnterKeyHandler.java Source code

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Here is the source code for cz.zcu.pia.social.network.frontend.handlers.OnEnterKeyHandler.java

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package cz.zcu.pia.social.network.frontend.handlers;

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

/**
 * Handles enter key pressed, its added to text field 
 * @author Ramn Talavera
 * @author http://ramontalaverasuarez.blogspot.cz/2014/06/vaadin-7-detect-enter-key-in-textfield.html
 */
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();

}