Android Open Source - customhellochartdemo Chart Data Animator V8

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License

The source code is released under:

Apache License

Java Source Code

package lecho.lib.hellocharts.animation;
//  w  w  w  .j a  va  2 s  . c o m
import lecho.lib.hellocharts.DummyChartAnimationListener;
import lecho.lib.hellocharts.view.Chart;
import android.os.Handler;
import android.os.SystemClock;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Interpolator;

public class ChartDataAnimatorV8 implements ChartDataAnimator {

  long start;
  boolean isAnimationStarted = false;
  long duration;
  final Chart chart;
  final Handler handler;
  final Interpolator interpolator = new AccelerateDecelerateInterpolator();
  private ChartAnimationListener animationListener = new DummyChartAnimationListener();
  private final Runnable runnable = new Runnable() {

    @Override
    public void run() {
      long elapsed = SystemClock.uptimeMillis() - start;
      if (elapsed > duration) {
        isAnimationStarted = false;
        handler.removeCallbacks(runnable);
        chart.animationDataFinished();
        return;
      }
      float scale = Math.min(interpolator.getInterpolation((float) elapsed / duration), 1);
      chart.animationDataUpdate(scale);
      handler.postDelayed(this, 16);

    }
  };

  public ChartDataAnimatorV8(Chart chart) {
    this.chart = chart;
    this.handler = new Handler();
  }

  @Override
  public void startAnimation(long duration) {
    if (duration >= 0) {
      this.duration = duration;
    } else {
      this.duration = DEFAULT_ANIMATION_DURATION;
    }

    isAnimationStarted = true;
    animationListener.onAnimationStarted();
    start = SystemClock.uptimeMillis();
    handler.post(runnable);
  }

  @Override
  public void cancelAnimation() {
    isAnimationStarted = false;
    handler.removeCallbacks(runnable);
    chart.animationDataFinished();
    animationListener.onAnimationFinished();
  }

  @Override
  public boolean isAnimationStarted() {
    return isAnimationStarted;
  }

  @Override
  public void setChartAnimationListener(ChartAnimationListener animationListener) {
    if (null == animationListener) {
      this.animationListener = new DummyChartAnimationListener();
    } else {
      this.animationListener = animationListener;
    }
  }
}

Java Source Code List

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