MainThread.java :  » GPS » tripcomputer » pl » tripcomputer » Android Open Source

package pl.tripcomputer;

import pl.tripcomputer.activities.ActivityMain;
import pl.tripcomputer.common.CommonActivity;
import pl.tripcomputer.common.CommonThread;
import android.graphics.Canvas;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.SurfaceHolder;


public class MainThread extends CommonThread
{
  //fields
  private SurfaceHolder mSurfaceHolder = null;
    
  //time elapsed between frames
  private long mLastFrameTime = 0;
    
  //drawing object
  private MainDraw mDraw = null;
    
  
  //methods
  public MainThread(SurfaceHolder holder, CommonActivity parent, Handler handler)
  {
    super(parent, handler);
        
    mSurfaceHolder = holder;
        
    mDraw = new MainDraw(parent);
  }
    
  protected void setSurfaceSize(int width, int height)
  {
    mDraw.surfaceSizeChanged(width, height, this.getScreenOrientation());      
  }
  
  protected boolean onTouchEvent(MotionEvent event)
  {
     return mDraw.onTouchEvent(event);
  }
    
  public void onInitializeData()
  {
    //init layers
    mDraw.initData();    
  }
  
  //run thread
  public void run()
  {
    super.run();
        
    //run animation loop
    while (this.isActive())
    {
      if (this.isRunning())
      {
        Canvas c = null;
        try
        {
          c = mSurfaceHolder.lockCanvas(null);          
          if (isEnabled())
          {
            updateLoop();
            if (c != null)
            {
               mDraw.doDraw(c);
            }
          }
        } finally {
          if (c != null)
            mSurfaceHolder.unlockCanvasAndPost(c);
        }
      } else {
        //sleep thread if not running
        try
        {
          Thread.sleep(50);
        } catch (InterruptedException e) {
        }
      }      
    }    
  }
    
  private void updateLoop()
  {
    //get now time
    final long timeNow = System.currentTimeMillis();

    //start delay by 100ms or whatever
    if (mLastFrameTime > timeNow)
      return;

    //update objects here
     mDraw.updateObjectsState();
    
    //update tracks
    ActivityMain.loader.updateObjectsState();

    //update last frame time
    mLastFrameTime = timeNow;    
  }
    
  public void onStateChanged()
  {
    if (isRunning())
      mLastFrameTime = System.currentTimeMillis() + 100;    
  }
  
  public Bundle saveState(Bundle map)
  {
    if (map != null)
    {        
      //map.put...
    }
    return map;
  }
  
  public void restoreState(Bundle savedState)
  {
    if (savedState != null)
    {      
      //savedState.get...
    }
  }  
  
}