PlayMediaScreen.java example

Explorer
LEADT-master
// #ifdef includeMusic
// [NC] Added in the scenario 07
package lancs.mobilemedia.core.ui.screens;

import java.io.InputStream;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Gauge;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.ItemStateListener;
import javax.microedition.media.Manager;
import javax.microedition.media.Player;
import javax.microedition.media.control.PitchControl;
import javax.microedition.media.control.TempoControl;
import javax.microedition.media.control.VolumeControl;

import lancs.mobilemedia.core.ui.MainUIMidlet;
import lancs.mobilemedia.core.ui.controller.AbstractController;


public class PlayMediaScreen extends Canvas implements ItemStateListener{
	
	public static final Command start = new Command("Start", Command.BACK, 0);
	public static final Command back = new Command("Back", Command.ITEM, 1);
	public static final Command stop = new Command("Stop", Command.ITEM, 1);	
	// #ifdef includeCopyPhoto
	// [NC] Added in the scenario 07
	public static final Command copy = new Command("Copy", Command.ITEM, 1);
	//#endif
	
	  // the midi player
	  Player midiPlayer = null;
	  
	  // the controls
	  VolumeControl volControl = null;
	  PitchControl pitchControl = null;
	  TempoControl tempoControl = null;
	  
	  // the visual elements
	  Form form = null;
	  Gauge volGauge = null;
	  Gauge pitchGauge = null;
	  Gauge tempoGauge = null;
	
	public PlayMediaScreen(MainUIMidlet midlet, InputStream storedMusic, String type, AbstractController controller) {
			    try {
			      
			      midiPlayer = Manager.createPlayer(storedMusic, type);
			      midiPlayer.prefetch();
			      volControl = (VolumeControl) midiPlayer.getControl(
			        "javax.microedition.media.control.VolumeControl");
			      pitchControl = (PitchControl) midiPlayer.getControl(
			        "javax.microedition.media.control.PitchControl");
			      tempoControl = (TempoControl) midiPlayer.getControl(
			        "javax.microedition.media.control.TempoControl");
			      form = new Form("MIDI Player", null);
			      
			      form.addCommand(back);
			      form.addCommand(start);
			      form.addCommand(stop);
			      
			      // #ifdef includeCopyPhoto
			  	  // [NC] Added in the scenario 07
			      form.addCommand(copy);
			      //#endif
			      
			      form.setCommandListener(controller);
	     
			      volGauge = new Gauge("Volume: 50", true, 100, 50);
 			      tempoGauge = new Gauge("Tempo: 120", true, 30, 12);
 			      pitchGauge = new Gauge("Pitch: 0", true, 10, 5);
			     
			      form.append(volGauge);
			      form.append(tempoGauge);
			      form.append(pitchGauge);
			      
			      form.setItemStateListener(this);     
			      Display.getDisplay(midlet).setCurrent(form);
			      
			    } catch(Exception e) {
			      System.err.println(e);
			    }
			  }
	  
	  public void itemStateChanged(final Item item) {
		    
		    if(!(item instanceof Gauge)) return;

		    Gauge gauge = (Gauge)item;
		    int val = gauge.getValue();
		   

		    if(item == volGauge) { 
		      volControl.setLevel(val); 
		      volGauge.setLabel("Volume: " + val);
		    }
		    if(item == tempoGauge && tempoControl != null) {
		      tempoControl.setTempo((val) * 10 * 1000);
		      tempoGauge.setLabel("Tempo: " + (val * 10));
		    }
		    

		    if(item == pitchGauge && pitchControl != null) {
		      pitchControl.setPitch((val - 5) * 12 * 1000);
		      pitchGauge.setLabel("Pitch: " + (val - 5));
		    }
		  }
	

	  public void startPlay() {
		    try {
		      // start the MIDI player if it was created
		      if(midiPlayer != null) {
		        midiPlayer.start();
		      }      
		    } catch(Exception e) {
		      System.err.println(e);
		    }
		  }
	  
	  public void pausePlay() {
		    try {
		      if(midiPlayer != null) {
		        midiPlayer.stop();
		      }
		    } catch(Exception e) {
		      System.err.println(e);
		    }
		  }

	protected void paint(Graphics arg0) {
		
	}

}
//#endif