BottomPanel.java

import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.container.HorizontalFieldManager;
import net.rim.device.api.ui.container.VerticalFieldManager;

import com.hiddenbrains.bbnews.common.PictureBackgroundButtonField;
import com.hiddenbrains.bbnews.screens.AboutScreen;
import com.hiddenbrains.bbnews.screens.NewsScreen;
import com.hiddenbrains.bbnews.screens.SettingsScreen;

public class BottomPanel extends VerticalFieldManager implements FieldChangeListener
{
	private PictureBackgroundButtonField news_pic,settings_pic,about_pic;
	private HorizontalFieldManager hr;
	private int current_index=0;
	public BottomPanel(int index)
	{
		super(FOCUSABLE);
		this.current_index=index;
		VerticalFieldManager ver=new VerticalFieldManager(USE_ALL_WIDTH|USE_ALL_HEIGHT)
		{
			protected void paint(Graphics g)
			{
				g.drawBitmap(0, 0, bottom_bar.getWidth(), bottom_bar.getHeight(), bottom_bar, 0, 0);
				super.paint(g);
			}
			protected void sublayout(int width, int height)
			{
				super.sublayout(width, bottom_bar.getHeight());
				setExtent(width, bottom_bar.getHeight());
			}
		};
		hr=new HorizontalFieldManager(FIELD_HCENTER);
		if(current_index==1)
		{
			news_pic=new PictureBackgroundButtonField(news_bit.getWidth(),news_bit.getHeight(), Field.NON_FOCUSABLE|Field.FIELD_VCENTER, news_bit_hover, news_bit_hover);
		}
		else
		{
			news_pic=new PictureBackgroundButtonField(news_bit.getWidth(),news_bit.getHeight(), Field.FOCUSABLE|Field.FIELD_VCENTER, StaticVariables.news_bit, StaticVariables.news_bit_hover);
		}
		news_pic.setChangeListener(this);
		hr.add(news_pic);

		if(current_index==2)
		{
			settings_pic=new PictureBackgroundButtonField(settings_bit.getWidth(),settings_bit.getHeight(), Field.NON_FOCUSABLE|Field.FIELD_VCENTER, settings_bit_hover, settings_bit_hover);
		}
		else
		{
			settings_pic=new PictureBackgroundButtonField(settings_bit.getWidth(),settings_bit.getHeight(), Field.FOCUSABLE|Field.FIELD_VCENTER, settings_bit, settings_bit_hover);
		}
		settings_pic.setChangeListener(this);
		hr.add(settings_pic);

		if(current_index==3)
		{
			about_pic=new PictureBackgroundButtonField(about_bit.getWidth(),about_bit.getHeight(),Field.NON_FOCUSABLE|Field.FIELD_VCENTER, about_bit_hover, about_bit_hover);
		}
		else
		{
			about_pic=new PictureBackgroundButtonField(about_bit.getWidth(),about_bit.getHeight(), Field.FOCUSABLE|Field.FIELD_VCENTER, about_bit, about_bit_hover);
		}
		about_pic.setChangeListener(this);
		hr.add(about_pic);

		ver.add(hr);
		add(ver);
	}
	protected void paint(Graphics g)
	{
		g.drawBitmap(0, 0, bottom_bar.getHeight(), bottom_bar.getHeight(), bottom_bar, 0, 0);
		super.paint(g);
	}
	public void fieldChanged(Field field, int context)
	{
		if(field==news_pic)
		{
			UiApplication.getUiApplication().pushScreen(new NewsScreen(1));
		}
		else if(field==settings_pic)
		{
			UiApplication.getUiApplication().pushScreen(new SettingsScreen(2));
		}
		else if(field==about_pic)
		{
			UiApplication.getUiApplication().pushScreen(new AboutScreen(3));
		}
	}
}