package org.sample.client;

import com.google.gwt.core.client.*;
import com.google.gwt.event.dom.client.*;
import com.google.gwt.user.client.rpc.*;
import com.google.gwt.user.client.ui.*;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class MyGwtApplication implements EntryPoint
{
    protected DialogBox mDialogBox;
    protected MyServiceAsync mSvc;
    protected AsyncCallback<String> mCallback;

    /**
     * This is the entry point method.
     */
    public void onModuleLoad()
    {
        // define the service you want to call
        mSvc = (MyServiceAsync) GWT.create( MyService.class );
        ServiceDefTarget endpoint = (ServiceDefTarget) mSvc;
        endpoint.setServiceEntryPoint( "MyService" );

        // define a handler for what to do when the
        // service returns a result
        mCallback = new AsyncCallback<String>()
        {
            public void onSuccess( String result )
            {
                serverAnswered( result );
            }

            public void onFailure( Throwable ex )
            {
                RootPanel.get().add( new HTML( ex.toString() ) );
            }
        };

        Image img = new Image( "http://code.google.com/webtoolkit/logo-185x175.png" );
        Button button = new Button( "Click me" );

        // We can add style names
        button.addStyleName( "pc-template-btn" );
        // or we can set an id on a specific element for styling
        img.getElement().setId( "pc-template-img" );

        VerticalPanel vPanel = new VerticalPanel();
        vPanel.setWidth( "100%" );
        vPanel.setHorizontalAlignment( VerticalPanel.ALIGN_CENTER );
        vPanel.add( img );
        vPanel.add( button );

        // Add image and button to the RootPanel
        RootPanel.get().add( vPanel );

        // Create the dialog box
        mDialogBox = new DialogBox();
//    dialogBox.setText("Welcome to GWT!");
        mDialogBox.setAnimationEnabled( true );
        Button closeButton = new Button( "close" );
        VerticalPanel dialogVPanel = new VerticalPanel();
        dialogVPanel.setWidth( "100%" );
        dialogVPanel.setHorizontalAlignment( VerticalPanel.ALIGN_CENTER );
        dialogVPanel.add( closeButton );

        closeButton.addClickHandler( new ClickHandler()
        {
            public void onClick( ClickEvent event )
            {
                mDialogBox.hide();
            }
        } );

        // Set the contents of the Widget
        mDialogBox.setWidget( dialogVPanel );

        button.addClickHandler( new ClickHandler()
        {
            public void onClick( ClickEvent event )
            {
                mSvc.myMethod( "Do Stuff", mCallback );
            }
        } );
    }

    private void serverAnswered( String pText )
    {
        mDialogBox.setText( pText );
        mDialogBox.center();
        mDialogBox.show();
    }
}