Android Open Source - adventure.datetime Tree View

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License

The source code is released under:

MIT License

Java Source Code

package ca.cmput301f13t03.adventure_datetime.view.treeView;
/*  ww w  .  j  av  a  2  s . com*/
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import ca.cmput301f13t03.adventure_datetime.model.Choice;
import ca.cmput301f13t03.adventure_datetime.model.Interfaces.IAllFragmentsListener;
import ca.cmput301f13t03.adventure_datetime.model.Interfaces.ICurrentFragmentListener;
import ca.cmput301f13t03.adventure_datetime.model.Interfaces.ICurrentStoryListener;
import ca.cmput301f13t03.adventure_datetime.model.Story;
import ca.cmput301f13t03.adventure_datetime.model.StoryFragment;
import ca.cmput301f13t03.adventure_datetime.serviceLocator.Locator;
import ca.cmput301f13t03.adventure_datetime.view.IFragmentSelected;

import java.util.Map;
import java.util.UUID;

public class TreeView extends SurfaceView 
  implements   IAllFragmentsListener, 
        ICurrentFragmentListener,
        ICurrentStoryListener,
        SurfaceHolder.Callback, 
        Runnable
{
  private static final float FPS = 120.0f; // strictly speaking this isn't being calculated quite right...
  private static final String TAG = "TreeView";
  
  private Thread m_drawingThread = null;
  private volatile boolean m_isDrawing = false;
  private SurfaceHolder m_surface = null;
  private Camera m_camera = null;
  
  private NodeGrid m_grid = null;
  private Map<UUID, StoryFragment> m_fragments = null;
  private Story m_currentStory = null;
  
  private InputHandler m_touchHandler = null;
  
  
  // must have all constructors or it doesn't work
  public TreeView(Context context) 
  {
    super(context);
    Setup();
  }
  
  public TreeView(Context context, AttributeSet attrs)
  {
    super(context, attrs);
    Setup();
  }
  
  public TreeView(Context context,AttributeSet attrs, int defStyle)
  {
    super(context, attrs, defStyle);
    Setup();
  }
  
  private void Setup()
  {
    this.getHolder().addCallback(this);
    
    m_grid = new NodeGrid(this.getResources());
    m_camera = new Camera();
    m_touchHandler = new InputHandler(m_camera, m_grid);
  }
  
  public void OnAllFragmentsChange(Map<UUID, StoryFragment> newFragments) 
  {
    m_fragments = newFragments;
    
    // due to the async nature of the callbacks we may not have all the data we need
    // at this point, we have most, but not all
    if(m_currentStory != null)
    {
      AfterDataAvailable();
    }
  }
  
  public void OnCurrentStoryChange(Story newStory) 
  {
    m_currentStory = newStory;
    
    if(m_fragments != null)
    {
      AfterDataAvailable();
    }
  }
  
  public void OnCurrentFragmentChange(StoryFragment newFragment) 
  {
    m_grid.SelectFragment(newFragment);
  }
  
  public void SetFragmentCallback(IFragmentSelected selectionCallback)
  {
    m_touchHandler.SetSelectionCallback(selectionCallback);
  }
  
  public IFragmentSelected GetFragmentCallback()
  {
    return m_touchHandler.GetSelectionCallback();
  }
  
  public void AddChoice(StoryFragment origin, Choice choice)
  {
    m_grid.AddChoice(origin, choice);
  }
  
  public void RemoveChoice(StoryFragment origin, Choice choice)
  {
    m_grid.RemoveChoice(origin, choice);
  }
  
  public void RefreshView()
  {
    m_grid.RefreshView();
  }
  
  private void AfterDataAvailable()
  {
    if(m_grid != null)
    {
      m_grid.SetFragments(m_fragments, m_currentStory.getHeadFragmentId());
    }
  }

  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) 
  {
    m_camera.ResizeView(width, height);
    m_camera.LookAt(0, 0);
  }

  @Override
  public void surfaceCreated(SurfaceHolder surface) 
  {
    Locator.getPresenter().Subscribe((ICurrentStoryListener)(this));
    Locator.getPresenter().Subscribe((IAllFragmentsListener)(this));
    Locator.getPresenter().Subscribe((ICurrentFragmentListener)(this));
    
    m_isDrawing = true;
    m_surface = surface;
    m_drawingThread = new Thread(this);
    m_drawingThread.start();
  }

  @Override
  public void surfaceDestroyed(SurfaceHolder surface) 
  {
    Locator.getPresenter().Unsubscribe((ICurrentStoryListener)(this));
    Locator.getPresenter().Unsubscribe((IAllFragmentsListener)(this));
    Locator.getPresenter().Unsubscribe((ICurrentFragmentListener)(this));
    
    m_isDrawing = false;
    if(m_drawingThread != null)
    {
      try 
      {
        // allow it to finish drawing the current frame
        m_drawingThread.join();
      } 
      catch (InterruptedException e) 
      {
        Log.w(TAG, "Interrupted while Joining! " + e.getMessage());
      }
      m_drawingThread = null;
    }
  }
  
  /**
   * Main thread for drawing
   */
  public void run() 
  {
    while(m_isDrawing)
    {
      Canvas canvas = m_surface.lockCanvas();
      
      if(canvas != null)
      {
        try
        {
          // clear canvas
          canvas.drawColor(Color.WHITE);
          
          // draw stuffs
          m_grid.Draw(canvas, m_camera);
        }
        finally
        {
          m_surface.unlockCanvasAndPost(canvas);
        }
      }
      
      // then sleep for a bit
      try 
      {
        Thread.sleep((long) (1000.0f / FPS));
      } 
      catch (InterruptedException e) 
      {
        // Don't care, just log it and move on
        Log.w(TAG, "Interrupted while sleeping!");
      }
    }
  }

  public boolean onTouchEvent(MotionEvent event)
  {
    if(m_touchHandler != null)
    {
      m_touchHandler.OnTouchAction(event);
    }
    
    //Must return true or we stop receiving input events!
    return true;
  }
  
}

Java Source Code List

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