package com.cooliris.media;
import android.util.FloatMath;
public final class FloatAnim {
private float mValue;
private float mDelta;
private float mDuration;
private long mStartTime;
public FloatAnim(float value) {
mValue = value;
mStartTime = 0;
}
public boolean isAnimating() {
return mStartTime != 0;
}
public float getTimeRemaining(long currentTime) {
float duration = (currentTime - mStartTime) * 0.001f;
if (mDuration > duration) // CR: braces
return mDuration - duration;
else
return 0.0f;
}
public float getValue(long currentTime) {
if (mStartTime == 0) {
return mValue;
} else {
return getInterpolatedValue(currentTime);
}
}
public void animateValue(float value, float duration, long currentTime) {
mDelta = getValue(currentTime) - value;
mValue = value;
mDuration = duration;
mStartTime = currentTime;
}
public void setValue(float value) {
mValue = value;
mStartTime = 0;
}
public void skip() {
mStartTime = 0;
}
private float getInterpolatedValue(long currentTime) {
float ratio = (float) (currentTime - mStartTime) * 0.001f / mDuration;
if (ratio >= 1f) { // CR: 1.0f
mStartTime = 0;
return mValue;
} else {
ratio = 0.5f - 0.5f * FloatMath.cos(ratio * 3.14159265f); // CR:
// (float)Math.PI
return mValue + (1f - ratio) * mDelta;
}
}
}