Android Open Source - customhellochartdemo Chart Viewport Animator V14

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Back to project page customhellochartdemo.

License

The source code is released under:

Apache License

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Java Source Code

package lecho.lib.hellocharts.animation;
/*from   ww w. j av a2  s. c  o  m*/
import lecho.lib.hellocharts.DummyChartAnimationListener;
import lecho.lib.hellocharts.model.Viewport;
import lecho.lib.hellocharts.view.Chart;
import android.animation.Animator;
import android.animation.Animator.AnimatorListener;
import android.animation.ValueAnimator;
import android.animation.ValueAnimator.AnimatorUpdateListener;
import android.annotation.SuppressLint;

@SuppressLint("NewApi")
public class ChartViewportAnimatorV14 implements ChartViewportAnimator, AnimatorListener, AnimatorUpdateListener {
  private ValueAnimator animator;
  private final Chart chart;
  private Viewport startViewport = new Viewport();
  private Viewport targetViewport = new Viewport();
  private Viewport newViewport = new Viewport();
  private ChartAnimationListener animationListener = new DummyChartAnimationListener();

  public ChartViewportAnimatorV14(Chart chart) {
    this(chart, FAST_ANIMATION_DURATION);
  }

  public ChartViewportAnimatorV14(Chart chart, long duration) {
    this.chart = chart;
    animator = ValueAnimator.ofFloat(0.0f, 1.0f);
    animator.setDuration(duration);
    animator.addListener(this);
    animator.addUpdateListener(this);
  }

  @Override
  public void startAnimation(Viewport startViewport, Viewport targetViewport) {
    this.startViewport.set(startViewport);
    this.targetViewport.set(targetViewport);
    animator.start();
  }

  @Override
  public void cancelAnimation() {
    animator.cancel();
  }

  @Override
  public void onAnimationUpdate(ValueAnimator animation) {
    float scale = animation.getAnimatedFraction();
    float diffLeft = (targetViewport.left - startViewport.left) * scale;
    float diffTop = (targetViewport.top - startViewport.top) * scale;
    float diffRight = (targetViewport.right - startViewport.right) * scale;
    float diffBottom = (targetViewport.bottom - startViewport.bottom) * scale;
    newViewport.set(startViewport.left + diffLeft, startViewport.top + diffTop, startViewport.right + diffRight,
        startViewport.bottom + diffBottom);
    chart.setCurrentViewport(newViewport, false);
  }

  @Override
  public void onAnimationCancel(Animator animation) {
  }

  @Override
  public void onAnimationEnd(Animator animation) {
    chart.setCurrentViewport(targetViewport, false);
    animationListener.onAnimationFinished();
  }

  @Override
  public void onAnimationRepeat(Animator animation) {
  }

  @Override
  public void onAnimationStart(Animator animation) {
    animationListener.onAnimationStarted();
  }

  @Override
  public boolean isAnimationStarted() {
    return animator.isStarted();
  }

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

}

Java Source Code List