Selecting Custom ObjectListField

Question

Hello Every one

I am using following code for generating custom objectlistfield its working fine, but the problem is , the screen where i am using this custom objectlistfield has 3 buttonfield, but when i click the buttonfield all the time the objectlist field is being selected, i dont no what is going wrong.. please help me out... its urgent...

public CustomObjectListField( String[] detailsStr, String[] nameStr, String [] details, String[] distance){
    this.detailsStr = detailsStr;
    this.nameStr = nameStr;
    this.details = details;
    this.distance = distance;
    screenWidth = Display.getWidth();
    firstrowPostion = (screenWidth) - (screenWidth - 20);
    secondRowPosition = (screenWidth)- (screenWidth - 100);
    try {
        FontFamily alphaSerifFamily = FontFamily.forName("BBAlpha Serif"); 
        titleFont = alphaSerifFamily.getFont(Font.PLAIN,3,Ui.UNITS_mm);
        row1Font = alphaSerifFamily.getFont(Font.PLAIN,2,Ui.UNITS_mm);
        row2Font = alphaSerifFamily.getFont(Font.PLAIN,2,Ui.UNITS_mm);
    }
    catch (Exception e){
        UiApplication.getUiApplication().pushScreen(new CustomDialog("Error in importing Font"));
    }
}

// We are going to take care of drawing the item.
public void drawListRow(ListField listField, Graphics graphics,int index, int y, int width) {
    if(listField.getSelectedIndex() == index) {
        graphics.setColor(Color.CORNSILK);
        graphics.fillRect(0,(index* listField.getRowHeight()),width, listField.getRowHeight());
        graphics.setColor(0x000000);
        invalidate();
    }
    graphics.setColor(Color.BLACK);
    graphics.drawText(index+1+". ", 0,y, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);
    graphics.setColor(Color.GREEN);
    graphics.setFont(titleFont);
    graphics.drawText(nameStr[index],firstrowPostion, y, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);              

    int newY = y + (this.getFont()).getHeight() + 1;  // y start for text
    graphics.setColor(Color.BLACK);
    graphics.setFont(row1Font);
    graphics.drawText(status,firstrowPostion, newY, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);
    graphics.setColor(Color.GREEN);
    graphics.setFont(row2Font);
    graphics.drawText(detailsStr[index],secondRowPosition, newY, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);

    graphics.setColor(Color.BLACK);
    newY = newY + (this.getFont()).getHeight() + 1;
    graphics.setFont(row1Font);
    graphics.drawText(Phase,firstrowPostion, newY, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);
    graphics.setFont(row2Font);
    graphics.drawText(details[index],secondRowPosition, newY, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);

    newY = newY + (this.getFont()).getHeight() + 1;
    graphics.setFont(row1Font);
    graphics.drawText(distanceStr,firstrowPostion, newY, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);
    graphics.setFont(row2Font);
    graphics.drawText(distance[index],secondRowPosition, newY, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);

    newY = newY + (this.getFont()).getHeight() + 1;
    graphics.setFont(row1Font);
    graphics.drawText(contact,firstrowPostion, newY, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);
    graphics.setFont(row2Font);
    graphics.drawText(contactString,secondRowPosition, newY, (DrawStyle.LEFT|DrawStyle.ELLIPSIS|DrawStyle.TOP), width);

     newY = newY + (this.getFont()).getHeight() + 1;
     graphics.drawLine(0,(index* listField.getRowHeight()), GlobalData.SCREEN_WIDTH, (index* listField.getRowHeight()));
}

}