com.tasktop.c2c.server.common.web.client.view.AbstractComposite.java Source code

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Here is the source code for com.tasktop.c2c.server.common.web.client.view.AbstractComposite.java

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/*******************************************************************************
 * Copyright (c) 2010, 2012 Tasktop Technologies
 * Copyright (c) 2010, 2011 SpringSource, a division of VMware
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Tasktop Technologies - initial API and implementation
 ******************************************************************************/
package com.tasktop.c2c.server.common.web.client.view;

import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyDownEvent;
import com.google.gwt.event.dom.client.KeyDownHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Widget;
import com.tasktop.c2c.server.common.web.client.widgets.FormSectionPanel;

public abstract class AbstractComposite extends Composite {

    protected void hookDefaultButton(final Button button) {
        FormSectionPanel focusPanel = getFormSectionPanel(button);
        if (focusPanel != null) {
            focusPanel.addKeyDownHandler(new KeyDownHandler() {
                @Override
                public void onKeyDown(KeyDownEvent event) {
                    if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) {
                        event.preventDefault();
                        event.stopPropagation();
                        button.click();
                    }
                }
            });
        } // else fail soft
    }

    private FormSectionPanel getFormSectionPanel(Widget w) {
        // Time for some recursion. Check for our two possible end cases - either w is null, or it's an instance of the
        // class we want.
        if (w == null || w instanceof FormSectionPanel) {
            return (FormSectionPanel) w;
        }

        // If it's neither of these, then recurse.
        return getFormSectionPanel(w.getParent());
    }
}