Android Open Source - RadaeePDF-B4A P D F Grid Thread

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Back to project page RadaeePDF-B4A.

License

The source code is released under:

Apache License

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Java Source Code

package com.radaee.util;
//from   www.  j  ava2  s.co  m
import com.radaee.pdf.Document;
import com.radaee.pdf.Matrix;
import com.radaee.pdf.Page;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;

/**
Inner class.<br/>
developer should not use this.
*/
public class PDFGridThread extends Thread
{
  private Handler m_hand = null;
  private Handler m_handUI = null;
  private boolean is_notified = false;
  private boolean is_waitting = false;
  private synchronized void wait_init()
  {
    try
    {
      if( is_notified )
        is_notified = false;
      else
      {
        is_waitting = true;
        wait();
        is_waitting = false;
      }
    }
    catch(Exception e)
    {
    }
  }
  private synchronized void notify_init()
  {
    if( is_waitting )
      notify();
    else
      is_notified = true;
  }
  protected PDFGridThread(Handler hand_ui)
  {
    super();
    m_handUI = hand_ui;
  }
  @Override
    public void start()
  {
    super.start();
    wait_init();
  }
  @Override
    public void run()
  {
    Looper.prepare();
    m_hand = new Handler(Looper.myLooper())
    {
      public void handleMessage(Message msg)
      {
        if( msg != null )
        {
          if( msg.what == 0 )//render function
          {
            PDFGridItem item = (PDFGridItem)msg.obj;
            if( item.render() ) m_handUI.sendMessage(m_handUI.obtainMessage(0, item));
            super.handleMessage(msg);
          }
          else//quit
          {
            super.handleMessage(msg);
            getLooper().quit();
          }
        }
        else
          getLooper().quit();
      }
    };
    notify_init();
    Looper.loop();
  }
  protected synchronized void start_render( PDFGridItem item )
  {
    m_hand.sendMessage(m_hand.obtainMessage(0, item));
  }
  public synchronized void destroy()
  {
    try
    {
      m_hand.sendEmptyMessage(100);
      join();
      m_hand = null;
      m_handUI = null;
    }
    catch(InterruptedException e)
    {
    }
  }
}

Java Source Code List