MainThread.java

package uoft.csc207.fishtank;

import android.graphics.Canvas;
import android.view.SurfaceHolder;

/** Hacky way to manage threading and updates. */
public class MainThread extends Thread {

  /** Where the fish tank items are drawn. */
  private FishTankView fishTankView;
  /** The canvas container. */
  private SurfaceHolder surfaceHolder;
  /** Whether the thread is running. */
  private boolean isRunning;
  /** The canvas on which to draw the fish tank. */
  public static Canvas canvas;

  /**
   * Construct the thread.
   *
   * @param surfaceHolder the canvas container.
   * @param view where the fish tank items are drawn.
   */
  public MainThread(SurfaceHolder surfaceHolder, FishTankView view) {
    this.surfaceHolder = surfaceHolder;
    this.fishTankView = view;
  }

  @Override
  public void run() {
    while (isRunning) {
      canvas = null;

      try {
        canvas = this.surfaceHolder.lockCanvas();
        synchronized (surfaceHolder) {
          this.fishTankView.update();
          this.fishTankView.draw(canvas);
        }
      } catch (Exception e) {
        e.printStackTrace();
      } finally {
        if (canvas != null) {
          try {
            surfaceHolder.unlockCanvasAndPost(canvas);
          } catch (Exception e) {
            e.printStackTrace();
          }
        }
      }

      try {
        this.sleep(300);
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }

  public void setRunning(boolean isRunning) {
    this.isRunning = isRunning;
  }
}