package com.marshalchen.common.uimodule.rippleDrawable;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Rect;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
/**
* Draws a Material ripple.
*/
class RippleBackground {
private static final Interpolator LINEAR_INTERPOLATOR = new LinearInterpolator();
private static final float GLOBAL_SPEED = 1.0f;
private static final float WAVE_OPACITY_DECAY_VELOCITY = 3.0f / GLOBAL_SPEED;
private static final float WAVE_OUTER_OPACITY_EXIT_VELOCITY_MAX = 4.5f * GLOBAL_SPEED;
private static final float WAVE_OUTER_OPACITY_EXIT_VELOCITY_MIN = 1.5f * GLOBAL_SPEED;
private static final float WAVE_OUTER_OPACITY_ENTER_VELOCITY = 10.0f * GLOBAL_SPEED;
private static final float WAVE_OUTER_SIZE_INFLUENCE_MAX = 200f;
private static final float WAVE_OUTER_SIZE_INFLUENCE_MIN = 40f;
private final RippleDrawable mOwner;
/** Bounds used for computing max radius. */
private final Rect mBounds;
/** Full-opacity color for drawing this ripple. */
private int mColorOpaque;
/** Maximum alpha value for drawing this ripple. */
private int mColorAlpha;
/** Maximum ripple radius. */
private float mOuterRadius;
/** Screen density used to adjust pixel-based velocities. */
private float mDensity;
// Software animators.
private ObjectAnimator mAnimOuterOpacity;
// Temporary paint used for creating canvas properties.
private Paint mTempPaint;
// Software rendering properties.
private float mOuterOpacity = 0;
private float mOuterX;
private float mOuterY;
/** Whether we should be drawing hardware animations. */
private boolean mHardwareAnimating;
/** Whether we can use hardware acceleration for the exit animation. */
private boolean mCanUseHardware;
/** Whether we have an explicit maximum radius. */
private boolean mHasMaxRadius;
/**
* Creates a new ripple.
*/
public RippleBackground(RippleDrawable owner, Rect bounds) {
mOwner = owner;
mBounds = bounds;
}
public void setup(int maxRadius, int color, float density) {
mColorOpaque = color | 0xFF000000;
mColorAlpha = Color.alpha(color) / 2;
if (maxRadius != RippleDrawable.RADIUS_AUTO) {
mHasMaxRadius = true;
mOuterRadius = maxRadius;
} else {
final float halfWidth = mBounds.width() / 2.0f;
final float halfHeight = mBounds.height() / 2.0f;
mOuterRadius = (float) Math.sqrt(halfWidth * halfWidth + halfHeight * halfHeight);
}
mOuterX = 0;
mOuterY = 0;
mDensity = density;
}
public boolean isHardwareAnimating() {
return mHardwareAnimating;
}
public void onHotspotBoundsChanged() {
if (!mHasMaxRadius) {
final float halfWidth = mBounds.width() / 2.0f;
final float halfHeight = mBounds.height() / 2.0f;
mOuterRadius = (float) Math.sqrt(halfWidth * halfWidth + halfHeight * halfHeight);
}
}
@SuppressWarnings("unused")
public void setOuterOpacity(float a) {
mOuterOpacity = a;
invalidateSelf();
}
@SuppressWarnings("unused")
public float getOuterOpacity() {
return mOuterOpacity;
}
/**
* Draws the ripple centered at (0,0) using the specified paint.
*/
public boolean draw(Canvas c, Paint p) {
return drawSoftware(c, p);
}
public boolean shouldDraw() {
final int outerAlpha = (int) (mColorAlpha * mOuterOpacity + 0.5f);
return mCanUseHardware && mHardwareAnimating || outerAlpha > 0 && mOuterRadius > 0;
}
private boolean drawSoftware(Canvas c, Paint p) {
boolean hasContent = false;
p.setColor(mColorOpaque);
final int outerAlpha = (int) (mColorAlpha * mOuterOpacity + 0.5f);
if (outerAlpha > 0 && mOuterRadius > 0) {
p.setAlpha(outerAlpha);
p.setStyle(Style.FILL);
c.drawCircle(mOuterX, mOuterY, mOuterRadius, p);
hasContent = true;
}
return hasContent;
}
/**
* Returns the maximum bounds of the ripple relative to the ripple center.
*/
public void getBounds(Rect bounds) {
final int outerX = (int) mOuterX;
final int outerY = (int) mOuterY;
final int r = (int) mOuterRadius + 1;
bounds.set(outerX - r, outerY - r, outerX + r, outerY + r);
}
/**
* Starts the enter animation.
*/
public void enter() {
cancel();
final int outerDuration = (int) (1000 * 1.0f / WAVE_OUTER_OPACITY_ENTER_VELOCITY);
final ObjectAnimator outer = ObjectAnimator.ofFloat(this, "outerOpacity", 0, 1);
outer.setAutoCancel(true);
outer.setDuration(outerDuration);
outer.setInterpolator(LINEAR_INTERPOLATOR);
mAnimOuterOpacity = outer;
// Enter animations always run on the UI thread, since it's unlikely
// that anything interesting is happening until the user lifts their
// finger.
outer.start();
}
/**
* Starts the exit animation.
*/
public void exit() {
cancel();
// Scale the outer max opacity and opacity velocity based
// on the size of the outer radius.
final int opacityDuration = (int) (1000 / WAVE_OPACITY_DECAY_VELOCITY + 0.5f);
final float outerSizeInfluence = constrain(
(mOuterRadius - WAVE_OUTER_SIZE_INFLUENCE_MIN * mDensity)
/ (WAVE_OUTER_SIZE_INFLUENCE_MAX * mDensity), 0, 1);
final float outerOpacityVelocity = Ripple.lerp(WAVE_OUTER_OPACITY_EXIT_VELOCITY_MIN,
WAVE_OUTER_OPACITY_EXIT_VELOCITY_MAX, outerSizeInfluence);
// Determine at what time the inner and outer opacity intersect.
// inner(t) = mOpacity - t * WAVE_OPACITY_DECAY_VELOCITY / 1000
// outer(t) = mOuterOpacity + t * WAVE_OUTER_OPACITY_VELOCITY / 1000
final int inflectionDuration = Math.max(0, (int) (1000 * (1 - mOuterOpacity)
/ (WAVE_OPACITY_DECAY_VELOCITY + outerOpacityVelocity) + 0.5f));
final int inflectionOpacity = (int) (mColorAlpha * (mOuterOpacity
+ inflectionDuration * outerOpacityVelocity * outerSizeInfluence / 1000) + 0.5f);
exitSoftware(opacityDuration, inflectionDuration, inflectionOpacity);
}
public static float constrain(float amount, float low, float high) {
return amount < low ? low : (amount > high ? high : amount);
}
/**
* Jump all animations to their end state. The caller is responsible for
* removing the ripple from the list of animating ripples.
*/
public void jump() {
endSoftwareAnimations();
}
private void endSoftwareAnimations() {
if (mAnimOuterOpacity != null) {
mAnimOuterOpacity.end();
mAnimOuterOpacity = null;
}
}
private Paint getTempPaint() {
if (mTempPaint == null) {
mTempPaint = new Paint();
}
return mTempPaint;
}
private void exitSoftware(int opacityDuration, int inflectionDuration, int inflectionOpacity) {
final ObjectAnimator outerOpacityAnim;
if (inflectionDuration > 0) {
// Outer opacity continues to increase for a bit.
outerOpacityAnim = ObjectAnimator.ofFloat(this,
"outerOpacity", inflectionOpacity / 255.0f);
outerOpacityAnim.setAutoCancel(true);
outerOpacityAnim.setDuration(inflectionDuration);
outerOpacityAnim.setInterpolator(LINEAR_INTERPOLATOR);
// Chain the outer opacity exit animation.
final int outerDuration = opacityDuration - inflectionDuration;
if (outerDuration > 0) {
outerOpacityAnim.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
final ObjectAnimator outerFadeOutAnim = ObjectAnimator.ofFloat(
RippleBackground.this, "outerOpacity", 0);
outerFadeOutAnim.setAutoCancel(true);
outerFadeOutAnim.setDuration(outerDuration);
outerFadeOutAnim.setInterpolator(LINEAR_INTERPOLATOR);
outerFadeOutAnim.addListener(mAnimationListener);
mAnimOuterOpacity = outerFadeOutAnim;
outerFadeOutAnim.start();
}
@Override
public void onAnimationCancel(Animator animation) {
animation.removeListener(this);
}
});
} else {
outerOpacityAnim.addListener(mAnimationListener);
}
} else {
outerOpacityAnim = ObjectAnimator.ofFloat(this, "outerOpacity", 0);
outerOpacityAnim.setAutoCancel(true);
outerOpacityAnim.setDuration(opacityDuration);
outerOpacityAnim.addListener(mAnimationListener);
}
mAnimOuterOpacity = outerOpacityAnim;
outerOpacityAnim.start();
}
/**
* Cancel all animations. The caller is responsible for removing
* the ripple from the list of animating ripples.
*/
public void cancel() {
cancelSoftwareAnimations();
}
private void cancelSoftwareAnimations() {
if (mAnimOuterOpacity != null) {
mAnimOuterOpacity.cancel();
mAnimOuterOpacity = null;
}
}
private void invalidateSelf() {
mOwner.invalidateSelf();
}
private final AnimatorListenerAdapter mAnimationListener = new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mHardwareAnimating = false;
}
};
}