GWT paste receive test.

ServletMaker.java

package com.akjava.gwt.servletmaker.client;

import com.akjava.gwt.lib.client.LogUtils;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.shared.GWT;
import com.google.gwt.dom.client.DataTransfer;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextArea;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class ServletMaker implements EntryPoint {
  

	private TextArea output;

	/**
	 * This is the entry point method.
	 */
	public void onModuleLoad() {
		 VerticalPanel root=new VerticalPanel();
		 RootPanel.get().add(root);
		 
		 PasteValueReceiveArea test=new PasteValueReceiveArea();
		 test.setText("Focus & Paste Here");
		 root.add(test);
		 test.setSize("400px", "100px");
		 test.setFocus(true);
		 test.addValueChangeHandler(new ValueChangeHandler<String>() {

			@Override
			public void onValueChange(ValueChangeEvent<String> event) {
				output.setText(event.getValue());
			}
			 
		});
		 
		
		 output = new TextArea();
		 output.setSize("400px","400px");
		 root.add(output);
		 
		 
		 
	}
	/**
	 * only work on Chrome(web-kit)
	 * to catch new value add addValueChangeHandler
	 * 
	 * 	addValueChangeHandler(new ValueChangeHandler<String>() {
				
				@Override
				public void onValueChange(ValueChangeEvent<String> event) {
					GWT.log("changed:"+event.getValue());
				}
			});
	 * ref
	 * https://groups.google.com/forum/?fromgroups#!topic/google-web-toolkit/CaNSdwfSK-A
	 * @author aki
	 *
	 */
	public class PasteValueReceiveArea extends TextArea{
		public PasteValueReceiveArea(){
			super();
			sinkEvents(Event.ONPASTE);
			
			setReadOnly(true);
			
			addValueChangeHandler(new ValueChangeHandler<String>() {
				
				@Override
				public void onValueChange(ValueChangeEvent<String> event) {
					GWT.log("changed:"+event.getValue());
				}
			});
		}
		public void onBrowserEvent(Event event) {
		    super.onBrowserEvent(event);
		    switch (event.getTypeInt()) {
		        case Event.ONPASTE: {
		        	LogUtils.log(event);
		        	GWT.log("paste");
		        	ValueChangeEvent.fire(this, getPastedText(event));
		            break;
		        }
		    }
		}
	}
	
	public static native String getPastedText(Event event)
    /*-{

        var text = "";

        if (event.clipboardData) // WebKit/Chrome/Safari
        {
            try
            {
                text = event.clipboardData.getData("Text");
                return text;
            }
            catch (e)
            {
                // Hmm, that didn't work.
            }
        }
        return text;
        }-*/;
}