Android Open Source - block-composer Float Value

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Back to project page block-composer.

License

The source code is released under:

MIT License

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Java Source Code

package bwr.blockcomposer.types;
//from w ww .ja va2  s .c  o m
import bwr.blockcomposer.AnimationFinishedListener;

public class FloatValue {

  public final static byte ANIMATION_NONE = 0;
  public final static byte ANIMATION_LINEAR = 1;

  // Cached value
  private float value;
  
  // Linear interpolation variables
  private float initial;
  private float rate = 0;
  
  // Animation variables
  private long time = 0;
  private long duration = 0;
  private byte animationType = ANIMATION_NONE;

  AnimationFinishedListener listener = null;
  
  public FloatValue(float initial) {
    this.value = initial;
  }
  
  public FloatValue() {
    this.value = 0f;
  }

  public void initLinearAnimation(float change, long duration, AnimationFinishedListener listener) {
    this.listener = listener;
    initLinearAnimation(change, duration);
  }
  
  public void initLinearAnimation(float change, long duration) {
    animationType = ANIMATION_LINEAR;
    initial = getValue(); // get result of last interpolation
    time = 0;
    this.duration = duration;
    rate = change/duration;
  }
  
  public void setValueOverTime(float value, long duration) {
    
    
    initLinearAnimation(value - this.value, duration);
  }
  
  public void update(long dt) {
    if(animationType == ANIMATION_NONE) return;
    
    time = Math.min(time + dt, duration);
    
    if(animationType == ANIMATION_LINEAR) {
      value = initial + time * rate;
    }
    
    if(time == duration) {
      animationType = ANIMATION_NONE;
      
      if(listener != null) {
        listener.onAnimationFinished();
        listener = null;
      }
    }
  }
  
  public float getValue() {
    return value;
  }

  public void setValue(float v) {
    this.value = v;
    animationType = ANIMATION_NONE;
  }
  
}

Java Source Code List