Web and WebWorks Development

[chicoxml]

Hello,

I am trying to make an extension to make a screen of load, Everything works very well, I can show the screen, but I cannot close it by means of a method automatically.

This it is the code of the extension:

Extensions.java

package AppExt;

import org.w3c.dom.Document;

import net.rim.device.api.browser.field2.BrowserField;
import net.rim.device.api.script.ScriptEngine;
import net.rim.device.api.web.WidgetConfig;
import net.rim.device.api.web.WidgetExtension;

public final class Extensions implements WidgetExtension {

	public String[] getFeatureList() {
		// TODO Auto-generated method stub
		String[] result = new String[1];
		result[0] = "AppExt.box";
		return result;
	}

	public void loadFeature(String feature, String version,
			Document doc, ScriptEngine scriptEngine) throws Exception {
		
		if (feature == "AppExt.box") {
	         scriptEngine.addExtension("AppExt.box", new BoxNamespace());
	      }
		// TODO Auto-generated method stub

	}

	public void register(WidgetConfig arg0, BrowserField arg1) {
		// TODO Auto-generated method stub

	}

	public void unloadFeatures(Document arg0) {
		// TODO Auto-generated method stub

	}

}

BoxNamespace.java

package AppExt;

import net.rim.device.api.script.ScriptableFunction;

public final class BoxNamespace extends ScriptableFunction {

	public static final String FIELD_SHOW = "show";
	public static final String FIELD_HTML = "html";
	public static final String FIELD_CLOSE = "close";

	private   String _html = "";
	private BoxFunction Boxfn;

	public BoxNamespace() {
		this.Boxfn = new BoxFunction(this);
	}

	// The getField() function is called when the
	// dot '.' extender is used on your JavaScript object.
	public Object getField(String name) throws Exception {

		if (name.equals(FIELD_SHOW)) {
			return this.Boxfn;
		} else if (name.equals(FIELD_HTML)) {
			return new String(_html);
		}else if(name.equals(FIELD_CLOSE)){
		
			 this.Boxfn.vbox.close();
		
		}
		return super.getField(name);
	}
	
	public boolean putField(String name, Object value) throws Exception {
		
		if (name.equals(FIELD_HTML)) {
			if (value != null && value != UNDEFINED) {
				this._html = (String)value;
				return true;
			}
		}
		return false;
	}
	
	public String getHtml() {
		return this._html;
	}
}

 BoxFunction.java

package AppExt;

import net.rim.device.api.script.ScriptableFunction;
import net.rim.device.api.ui.UiApplication;

public final class BoxFunction extends ScriptableFunction  {
	private  BoxNamespace _boxNspace =null; 
	public 	popup vbox ;
	public BoxFunction(BoxNamespace boxNamespace) {
		_boxNspace =boxNamespace;
	}
	public Object invoke(Object obj, Object[] args) throws Exception {
		
		final UiApplication uiApp = UiApplication.getUiApplication();
	  	uiApp.invokeLater (new Runnable() {
		    public void run()
		    {
		    	vbox = new popup( _boxNspace.getHtml()); //
		    	uiApp.pushModalScreen(vbox);
		    }
		});	
		return UNDEFINED;
	}
	
	public ScriptableFunction closewindow = new ScriptableFunction() 
	{
	   public Object invoke(Object obj, Object[] args) throws Exception
	   {
		   vbox.close();
	      return UNDEFINED;
	   }
	};  
	
}

 popup.java

package AppExt;

import net.rim.device.api.browser.field2.BrowserField;
import net.rim.device.api.browser.field2.BrowserFieldConfig;
import net.rim.device.api.ui.container.PopupScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;

public class popup extends PopupScreen {

	public popup(String html) {
		super(new VerticalFieldManager());
		BrowserFieldConfig config = new BrowserFieldConfig();
		config.setProperty(BrowserFieldConfig.NAVIGATION_MODE, BrowserFieldConfig.NAVIGATION_MODE_CARET);
		config.setProperty("Content-Type", "text/plain; charset=utf-8"); 
		config.setProperty(BrowserFieldConfig.JAVASCRIPT_ENABLED, Boolean.TRUE);
		BrowserField bw = new BrowserField(config);
		bw.displayContent(html, "http://localhost/");
		add(bw);
		// TODO Auto-generated constructor stub
	}

}

in javascript:

loading();

function loading()
		{
			AppExt.box.html ="<h4>loading..</h4>";
			AppExt.box.show();
			 setTimeout(function(){
				   
					AppExt.box.close();
					 alert("closing");
		     }, 3000)	

			
		}

I am supposing that the problem this in this line, but that I am making bad.

AppExt.box.close();

[chicoxml]

java.lang.illegalStateException: UI engine accessed without holding the event lock

library.xml

<?xml version="1.0" encoding="UTF-8"?>
<library>
    <extension>
        <entryClass>AppExt.Extensions</entryClass>
    </extension>
    <features>
        <feature id="AppExt.box" version="1.0.0" ></feature>
    </features>
</library>

[ibarrera · Accepted solution]

I think you should catch the event lock when you close your screen... so instead of only vbox.close() try this...

final UiApplication uiApp = UiApplication.getUiApplication();
	  	uiApp.invokeLater (new Runnable() {
		    public void run() {
		    	 vbox.close();
		    }
		});