[itp]

I am trying to build a simple menu using ButtonFields. I am able to navigate from screen to screen.

Testing on the emulator, if I use the "Enter Button" or Enter key on my beyboard, I can navigate from Screen A to Screen B. However if I use the Pearl trackball, I get I get <Full Menu> and then <Close> menu options.

What technique can I use to skip these menu options in an application. I also tried variations of super(DEFAULT_MENU | DEFAULT_CLOSE), with no success.

Please respond gently, as I am still quite new with this.

thank you

PHP Code:

import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.UiApplication;

class MenuMain extends UiApplication
{
   public static void main(Stringxxx91;xxx93; args)    
   {  
        MenuMain theApp = new MenuMain();
        theApp.enterEventDispatcher();       
   } 
   public MenuMain()   
   {
       pushScreen(new MenuButtonScreenA());   
   }   
}

import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;

public class MenuButtonScreenA extends MainScreen implements FieldChangeListener
{
    private ButtonField b1,b2;
    public MenuButtonScreenA()
    {
        super(DEFAULT_MENU);
        LabelField title = new LabelField("Menu Button Test Screen -A-" ,LabelField.ELLIPSIS |  LabelField.USE_ALL_WIDTH); 
        setTitle(title);           
         
        b1 = new ButtonField("Go To Screen B");    
        b2 = new ButtonField("Go To Screen C");       
        this.add(b1);
        this.add(b2);
        b1.setChangeListener(this);
        b2.setChangeListener(this);
    }
   
    public void fieldChanged(Field field, int context)
    {
         if(field instanceof ButtonField)
         {        
             String lbl = ((ButtonField)field).getLabel();
        
             if(lbl.equals("Go To Screen B"))
             {   
                 MenuButtonScreenB sc = new MenuButtonScreenB();
                 UiApplication.getUiApplication().pushScreen(sc);
             }
             
             if(lbl.equals("Go To Screen C"))
             {
                 Dialog.alert("This will soon take you to Screen C");
                 //MenuButtonScreenC sc = new MenuButtonScreenC();
                 //UiApplication.getUiApplication().pushScreen(sc);
             }
        }   
    }

  //override the onClose() method to display a dialog box to the user with "Goodbye!" when the application is closed
   public boolean onClose()
   {
       Dialog.alert("Goodbye!");
       System.exit(0);
       return true;
   }
}

 import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;

public class MenuButtonScreenB extends MainScreen implements FieldChangeListener
{
    private ButtonField b1,b2;

    public MenuButtonScreenB()
    {
        super(DEFAULT_MENU);
        LabelField title = new LabelField("Menu Button Test Screen -B-" ,LabelField.ELLIPSIS |  LabelField.USE_ALL_WIDTH); 
        setTitle(title);           
         
        b1 = new ButtonField("Go To Screen B-1");    
        b2 = new ButtonField("Go To Screen B-2");       
        this.add(b1);
        this.add(b2);
        b1.setChangeListener(this);
        b2.setChangeListener(this);         
    }
    
    public void fieldChanged(Field field, int context)
    {
         if(field instanceof ButtonField)
         {        
             String lbl = ((ButtonField)field).getLabel();
        
             if(lbl.equals("Go To Screen B-1"))
             {            
                 Dialog.alert("This will soon take you to Screen B-1");
                 //MenButtonScreenB sc = new MenButtonScreenB();
                 //UiApplication.getUiApplication().pushScreen(sc);
             }
             
             if(lbl.equals("Go To Screen B-2"))
             {
                 Dialog.alert("This will soon take you to Screen B-2");
                 //MenButtonScreenC sc = new MenButtonScreenC();
                 //UiApplication.getUiApplication().pushScreen(sc);
             }
        }   
    }    
    
    public boolean onClose()
    {  
       setDirty(false);
       return super.onClose();
   }    
} 


[itp]

I was able to solve this by using a FieldChangeListener like this. But it seems like a cludgy solution. Any better ideas?

b1 = new ButtonField("Goto Screen B",ButtonField.CONSUME_CLICK);
b1.setChangeListener(new FieldChangeListener()
{
public void fieldChanged(Field field, int context)
{
MenuButtonScreenB sc = new MenuButtonScreenB();
UiApplication.getUiApplication().pushScreen(sc);
}
});
this.add(b1);

PHP Code:

import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.UiApplication;

class MenuMain extends UiApplication
{
   public static void main(Stringxxx91;xxx93; args)    
   {  
        MenuMain theApp = new MenuMain();
        theApp.enterEventDispatcher();       
   } 
   public MenuMain()   
   {
       pushScreen(new MenuButtonScreenA());   
   }   
}

import net.rim.device.api.ui.*;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.*;

public class MenuButtonScreenA extends MainScreen 
{
    private ButtonField b1,b2;
    private ButtonField buttonSel;
    
    public MenuButtonScreenA()
    {
        super(DEFAULT_MENU);
        LabelField title = new LabelField("Menu Button Test Screen -A-" ,LabelField.ELLIPSIS |  LabelField.USE_ALL_WIDTH); 
        setTitle(title);           
        
        //--------------
        b1 = new ButtonField("Goto Screen B",ButtonField.CONSUME_CLICK);
        b1.setChangeListener(new FieldChangeListener()
        {
            public void fieldChanged(Field field, int context)
            {
                MenuButtonScreenB sc = new MenuButtonScreenB();
                UiApplication.getUiApplication().pushScreen(sc);
            }
        });
        this.add(b1);
        //--------------        
        b2 = new ButtonField("Goto Screen C",ButtonField.CONSUME_CLICK);
        b2.setChangeListener(new FieldChangeListener()
        {
            public void fieldChanged(Field field, int context)
            {
                MenuButtonScreenC sc = new MenuButtonScreenC();
                UiApplication.getUiApplication().pushScreen(sc);
            }
        });
        this.add(b2);
        //--------------
        
    }
    

  //override the onClose() method to display a dialog box to the user with "Goodbye!" when the application is closed
   public boolean onClose()
   {       
       boolean retval = false;
       int response = Dialog.ask(Dialog.D_YES_NO, "Are you sure you want to Exit now?", Dialog.NO);     
       if(response==Dialog.YES)
       {                
           System.exit(0);
           retval = true;       
       }       
       return retval;
   }   
}

import net.rim.device.api.ui.*;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.*;


public class MenuButtonScreenB extends MainScreen 
{
    private ButtonField b1,b2;

    public MenuButtonScreenB()
    {
        super(DEFAULT_MENU);
        LabelField title = new LabelField("Menu Button Test Screen -B1-" ,LabelField.ELLIPSIS |  LabelField.USE_ALL_WIDTH); 
        setTitle(title);           
         
        //--------------
        b1 = new ButtonField("Goto Screen B-1",ButtonField.CONSUME_CLICK);
        b1.setChangeListener(new FieldChangeListener()
        {
            public void fieldChanged(Field field, int context)
            {
                Dialog.alert("This will soon take you to Screen B-1");
            }
        });
        this.add(b1);
    }
    
    public boolean onClose()
    {  
       setDirty(false);
       return super.onClose();
   }       
}

import net.rim.device.api.ui.*;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;

public class MenuButtonScreenC extends MainScreen
{
    private ButtonField b1,b2;

    public MenuButtonScreenC()
    {
        super(DEFAULT_MENU);                                
        LabelField title = new LabelField("Menu Button Test Screen -C1-" ,LabelField.ELLIPSIS |  LabelField.USE_ALL_WIDTH); 
        setTitle(title);           
         
        //--------------
        b1 = new ButtonField("Goto Screen C-1",ButtonField.CONSUME_CLICK);
        b1.setChangeListener(new FieldChangeListener()
        {
            public void fieldChanged(Field field, int context)
            {
                Dialog.alert("This will soon take you to Screen C-1");
            }
        });
        this.add(b1);
    }
    
    public boolean onClose()
    {  
       setDirty(false);
       return super.onClose();
   }       
} 


[Dougsg38p]

You could have added the CONSUME_CLICK style to your button field - this would keep the menu from poppin up.