com.premiumminds.webapp.wicket.behaviours.EnableSubmitOnEnterBehaviour.java Source code

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Here is the source code for com.premiumminds.webapp.wicket.behaviours.EnableSubmitOnEnterBehaviour.java

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/**
 * Copyright (C) 2014 Premium Minds.
 *
 * This file is part of pm-wicket-utils.
 *
 * pm-wicket-utils is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 *
 * pm-wicket-utils is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with pm-wicket-utils. If not, see <http://www.gnu.org/licenses/>.
 */
package com.premiumminds.webapp.wicket.behaviours;

import org.apache.wicket.Component;
import org.apache.wicket.WicketRuntimeException;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.OnDomReadyHeaderItem;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.IFormSubmitter;
import org.apache.wicket.markup.html.form.IFormSubmittingComponent;
import org.apache.wicket.util.visit.IVisit;
import org.apache.wicket.util.visit.IVisitor;

public class EnableSubmitOnEnterBehaviour extends Behavior {
    private static final long serialVersionUID = -7194468587182980219L;

    @Override
    public void bind(Component component) {
        super.bind(component);
        if (!(component instanceof Form<?>))
            throw new WicketRuntimeException("can only add this component to forms");
    }

    @Override
    public void onConfigure(Component component) {
        super.onConfigure(component);
        component.setOutputMarkupId(true);
    }

    @Override
    public void renderHead(Component component, IHeaderResponse response) {
        super.renderHead(component, response);

        Form<?> form = (Form<?>) component;
        Component submitter = (Component) findSubmitButton(form);

        response.render(OnDomReadyHeaderItem
                .forScript("$(\"#" + component.getMarkupId() + "\").keypress(function(e){ if(e.keyCode==13) $(\"#"
                        + submitter.getMarkupId() + "\").click(); });"));
    }

    private static IFormSubmitter findSubmitButton(final Form<?> form) {
        IFormSubmittingComponent submittingComponent = form.visitChildren(IFormSubmittingComponent.class,
                new IVisitor<Component, IFormSubmittingComponent>() {
                    public void component(final Component component, final IVisit<IFormSubmittingComponent> visit) {
                        // Get submitting component
                        final IFormSubmittingComponent submittingComponent = (IFormSubmittingComponent) component;
                        final Form<?> formFromComponent = submittingComponent.getForm();

                        if ((formFromComponent != null) && (formFromComponent == form)) {
                            visit.stop(submittingComponent);
                        }
                    }
                });

        return submittingComponent;
    }

}