Help: fieldChanged is not implemented

Hello

Please help me on this bug.

I'm working on BB Storm2 9520, developing on JRE 5.0.0 not JRE (API) 6.0.0

I created a class BaseScreen, which extends the screen and implements FieldChangeListener

public abstract class BaseScreen extends MainScreen implements FieldChangeListener{    protected MToolbarButtonField btn1;    protected MToolbarButtonField btn2;    protected MToolbarButtonField btn3;    protected MToolbarButtonField btn4;    protected MToolbarButtonField btn5;    protected ToolbarManager toolbarManager;

    public BaseScreen() {        toolbarManager = new ToolbarManager();        HorizontalFieldManager hfm = new HorizontalFieldManager();        hfm.add(btn1);        hfm.add(btn2);        hfm.add(btn3);        hfm.add(btn4);        hfm.add(btn5);        toolbarManager.add(hfm);        setStatus(toolbarManager);    }

    public void fieldChanged(Field field, int context)     {        System.out.println("======== Toolbar Button Clicled ========");    }

}

Class MToolbarButtonField extends the ToolbarButtonField class:

public class MToolbarButtonField extends ToolbarButtonField{    private Bitmap bmpIcon;

    public MToolbarButtonField(Bitmap bmp) {        super(Field.FOCUSABLE, bmp);        bmpIcon = bmp;    }

    protected void paint(Graphics g) {        //...    }}

Class ToolbarButtonField extends the class of field:

public class ToolbarButtonField extends Field{    private Bitmap bmpIcon;

    public ToolbarButtonField(long style, Bitmap bmp) {        super(style);        bmpIcon = bmp;    }

    protected void paint(Graphics g) {        //...    }

    protected boolean navigationClick(int status, int time)     {        fieldChangeNotify(1);        return true;    }

}

Then, I created some screens that extends the BaseScreen class and FieldChangeListener tools:

public class Screen1 extends BaseScreen implements FieldChangeListener{    private BitmapButtonField btn1;    private BitmapButtonField btn2;

    public Screen1() {        btn1 = new          BitmapButtonField(Bitmap.getBitmapResource(               "bntmyinfos.png"),              Field.FOCUSABLE| FIELD_LEFT | FIELD_VCENTER);        btn2 = new BitmapButtonField(Bitmap.getBitmapResource(              "bntmycont.png"),              Field.FOCUSABLE| FIELD_LEFT | FIELD_VCENTER);    }

    public void fieldChanged(Field field, int context) {        System.out.println("==== Screen1 buttons clicked");        //...    }}

When I clicked on the btn1, btn2 on Screen1, the Screen1.fieldChanged prints to the Console Windows "= Screen1 buttons clicked.

But when I clicked the btn1 on toolbar, nothing happenned.

I've already put the style buttons toolbarManager are FOCUSABLE so why nothing is there?

What should I do to make the BaseScreen.fieldChanged took place?

Everyone please help.

Thanks in advance.

Hi guys,.

Thank you for your support.

Now, I already solved the problem.

And the solution is the fieldChangeNotify (int context) method.

Add this method in the ToolbarButtonField class, and it works.

Here is my code that worked:

ToolbarButtonField

public class ToolbarButtonField extends Field (    private Bitmap bmpIcon;

    public ToolbarButtonField(Bitmap bmp)    {        super(Field.FOCUSABLE);        bmpIcon = bmp;    }

    protected void fieldChangeNotify(int context) {           this.getChangeListener().fieldChanged(this, context);       }

    protected boolean navigationClick(int status, int time)     {        fieldChangeNotify(1);        return true;    }

    protected void paint(Graphics g)    {        //...    }    //...}

and some changes: in BaseScreen, let the fieldChanged method do nothing, change the MToolbarButtonField of extends from ToolbarButtonField to implements FieldChangeListener, and then implement the fieldChanged here method:

public class MToolbarButtonField implements FieldChangeListener {
    private Bitmap bmpIcon;
    private BaseScreen caller
    private ToolbarButtonField btn1;
    private ToolbarButtonField btn2;
    private ToolbarButtonField btn3;
    private ToolbarButtonField btn4;
    private ToolbarButtonField btn5;
    private VerticalFieldManager toolbarFieldManager;

    public MToolbarButtonField(BaseScreen caller) {
        this.caller = caller;
        toolbarFieldManager = new VerticalFieldManager();

        btn1 = new ToolbarButtonField();
        btn1.setChangeListener(this);
        btn2 = new ToolbarButtonField();
        btn2.setChangeListener(this);
        btn3 = new ToolbarButtonField();
        btn3.setChangeListener(this);
        btn4 = new ToolbarButtonField();
        btn4.setChangeListener(this);
        btn5 = new ToolbarButtonField();
        btn5.setChangeListener(this);

        toolbarFieldManager.add(btn1);
        toolbarFieldManager.add(btn2);
        toolbarFieldManager.add(btn3);
        toolbarFieldManager.add(btn4);
        toolbarFieldManager.add(btn5);
    }

    public void addToolbarToScreen()
    {
        caller.setStatus(toolbarFieldManager);
    }

    public void fieldChanged(Field field, int context)
    {
        if (field == btn1)
        {
            System.out.println("Button 1 clicked !");
        }
        if (field == btn2)
        {
            System.out.println("Button 2 clicked !");
        }
        if (field == btn3)
        {
            System.out.println("Button 3 clicked !");
        }
        if (field == btn4)
        {
            System.out.println("Button 4 clicked !");
        }
        if (field == btn5)
        {
            System.out.println("Button 5 clicked !");
        }
    }
}

BaseScreen:

public abstract class BaseScreen extends MainScreen implements FieldChangeListener
{
    MToolbar toolbarManager;
    /**
     * Creates a new MyScreen object
     */
    public BaseScreen()
    {
        // Set the displayed title of the screen
        setTitle("Toolbar Button display");

        toolbarManager = new MToolbar(this);
        toolbarManager.addToolbarToScreen();
    }
}

MyScreen (Screen1 last time):

public class MyScreen extends BaseScreen {
    private ButtonField btn6;
    private ButtonField btn7;

    VerticalFieldManager vfm;

    public MyScreen()
    {
    vfm = new VerticalFieldManager();
    btn6 = new ButtonField("MyScr button 1", Field.FOCUSABLE);
    btn6.setChangeListener(new FieldChangeListener()
    {
        public void fieldChanged(Field field, int content)
        {
        Dialog.alert("My Screen's button 1 clicked!");
        }
    });
    vfm.add(btn6);

    btn7 = new ButtonField("MyScr button 2", Field.FOCUSABLE);
    btn7.setChangeListener(new FieldChangeListener()
    {
        public void fieldChanged(Field field, int content)
        {
        Dialog.alert("My Screen's button 2 clicked!");
        }
    });
    vfm.add(btn7);

    this.add(vfm);
    }
}

Tags: BlackBerry Developers

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