import javax.microedition.midlet.MIDlet;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTError;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ercp.swt.mobile.MobileShell;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.browser.Browser;
import org.eclipse.ercp.swt.mobile.QueryDialog;
import org.eclipse.ercp.swt.mobile.Command;
 
 
public class BrowserMIDlet extends MIDlet implements SelectionListener, Runnable {
    private Command exitCommand;
    private Command backCommand;
    private Command openCommand;
    private Command forwardCommand;
    private Command changeCommand;
    private Display display;
    private MobileShell shell;
    private Thread uiThread;
    private Browser browser = null;
    private boolean exiting = false;
    private int style = 2;  //MobileShell.SMALL_STATUS_PANE
    private String url = "http://www.google.com";
 
    public void startApp() {
        if(uiThread == null) {
            uiThread = new Thread(this);
            uiThread.start();
        }        
    }
 
    public void pauseApp() {
    	//To do
    }
 
    public void destroyApp(boolean unconditional) {
        exitEventLoop();
        try {
            uiThread.join();
        } 
        catch(InterruptedException e) {
        	//To do
        }        
    }
 
    void exitEventLoop() {
        exiting = true;
        Display.getDefault().wake();
    }
 
    public void run() {
        display = new Display();
        shell = new MobileShell(display, SWT.NONE, style);
        shell.setLayout(new FillLayout());        
        exitCommand = new Command(shell, Command.EXIT, 0);
        exitCommand.setText("Exit");
        exitCommand.addSelectionListener(this);        
        backCommand = new Command(shell, Command.BACK, 0);
        backCommand.setText("Back");
        backCommand.addSelectionListener(this);
        forwardCommand = new Command(shell, Command.OK, 0);
        forwardCommand.setText("Forward");
        forwardCommand.addSelectionListener(this);
        openCommand = new Command(shell, Command.OK, 1);
        openCommand.setText("Enter URL");
        openCommand.addSelectionListener(this);
        changeCommand = new Command(shell, Command.OK, 2);
        changeCommand.setText("Change status pane");
        changeCommand.addSelectionListener(this);
        try {
            browser = new Browser(shell, SWT.NONE);
        } catch (SWTError e) {
            MessageBox message = new MessageBox(shell, SWT.NONE);
            message.setText("SWTError: " + e.getMessage());
            message.open();
        }
        if (browser != null) {
            browser.setUrl(url);
        }
        shell.open();
        while(!exiting) {
            if(!display.readAndDispatch()) {
                display.sleep();
            }
        }
        browser.dispose();  // dispose objects
        shell.dispose();
        display.dispose();
        notifyDestroyed();  // exit MIDlet
    }
 
    public void widgetSelected(SelectionEvent e) {
        if (e.widget.equals(exitCommand)) {
            exitEventLoop();
        }
        if (e.widget.equals(backCommand)) {
            if (browser.isBackEnabled()) browser.back();
        }
        if (e.widget.equals(forwardCommand)) {
            if (browser.isForwardEnabled()) browser.forward();
        }
        if (e.widget.equals(openCommand)) {
            QueryDialog dialog = new QueryDialog(shell, SWT.NONE, QueryDialog.STANDARD);
            dialog.setPromptText("Enter URL:", "http://");
            url = dialog.open();
            if (url != null) {
                browser.setUrl(url);                
                shell.redraw();
            } else {}
        }
        if (e.widget.equals(changeCommand)) {
            if (style < 3) style = style + 1;
            else if (style == 3) style = 1;
            shell.changeTrim(SWT.SHELL_TRIM, style);
        }
    }
 
    public void widgetDefaultSelected(SelectionEvent arg0) {
    	//To do
    }    
}