Merge "Updated entrance animation for assistant handles." into qt-dev

import static com.android.systemui.tuner.TunablePadding.FLAG_END;

import static com.android.systemui.tuner.TunablePadding.FLAG_START;

import android.animation.Animator;

import android.animation.AnimatorSet;

import android.animation.ObjectAnimator;

import android.annotation.Dimension;

import android.app.ActivityManager;

import android.app.Fragment;

import android.provider.Settings.Secure;

import android.util.DisplayMetrics;

import android.util.Log;

import android.util.MathUtils;

import android.view.DisplayCutout;

import android.view.DisplayInfo;

import android.view.Gravity;

import android.view.ViewGroup.LayoutParams;

import android.view.ViewTreeObserver;

import android.view.WindowManager;

import android.view.animation.Animation;

import android.view.animation.AnimationSet;

import android.view.animation.OvershootInterpolator;

import android.view.animation.Interpolator;

import android.view.animation.PathInterpolator;

import android.view.animation.ScaleAnimation;

import android.view.animation.TranslateAnimation;

import android.widget.FrameLayout;

import android.widget.ImageView;

        }

    }

    /**

     * Returns an animator that animates the given view from start to end over durationMs. Start and

     * end represent total animation progress: 0 is the start, 1 is the end, 1.1 would be an

     * overshoot.

     */

    Animator getHandleAnimator(View view, float start, float end, boolean isLeft, long durationMs,

            Interpolator interpolator) {

        // Note that lerp does allow overshoot, in cases where start and end are outside of [0,1].

        float scaleStart = MathUtils.lerp(2f, 1f, start);

        float scaleEnd = MathUtils.lerp(2f, 1f, end);

        Animator scaleX = ObjectAnimator.ofFloat(view, View.SCALE_X, scaleStart, scaleEnd);

        Animator scaleY = ObjectAnimator.ofFloat(view, View.SCALE_Y, scaleStart, scaleEnd);

        float translationStart = MathUtils.lerp(0.2f, 0f, start);

        float translationEnd = MathUtils.lerp(0.2f, 0f, end);

        int xDirection = isLeft ? -1 : 1;

        Animator translateX = ObjectAnimator.ofFloat(view, View.TRANSLATION_X,

                xDirection * translationStart * view.getWidth(),

                xDirection * translationEnd * view.getWidth());

        Animator translateY = ObjectAnimator.ofFloat(view, View.TRANSLATION_Y,

                translationStart * view.getHeight(), translationEnd * view.getHeight());

        AnimatorSet set = new AnimatorSet();

        set.play(scaleX).with(scaleY);

        set.play(scaleX).with(translateX);

        set.play(scaleX).with(translateY);

        set.setDuration(durationMs);

        set.setInterpolator(interpolator);

        return set;

    }

    private void fade(View view, boolean fadeIn, boolean isLeft) {

        if (fadeIn) {

            view.animate().cancel();

            view.setAlpha(1f);

            view.setVisibility(View.VISIBLE);

            AnimationSet anim = new AnimationSet(true);

            anim.setDuration(900);

            Animation scaleAnimation = new ScaleAnimation(2f, 1f, 2f, 1f,

                    ScaleAnimation.RELATIVE_TO_SELF, 0.5f, ScaleAnimation.RELATIVE_TO_SELF, 0.5f);

            anim.addAnimation(scaleAnimation);

            anim.setInterpolator(new PathInterpolator(0.02f, 0.44f, 0.67f, 1.00f));

            Animation translateAnimation = new TranslateAnimation(

                    TranslateAnimation.RELATIVE_TO_SELF, isLeft ? -0.2f : 0.2f,

                    TranslateAnimation.RELATIVE_TO_SELF,

                    0f,

                    TranslateAnimation.RELATIVE_TO_SELF, 0.2f, TranslateAnimation.RELATIVE_TO_SELF,

                    0f);

            anim.addAnimation(translateAnimation);

            anim.setInterpolator(new OvershootInterpolator());

            view.startAnimation(anim);

            // A piecewise spring-like interpolation.

            // End value in one animator call must match the start value in the next, otherwise

            // there will be a discontinuity.

            AnimatorSet anim = new AnimatorSet();

            Animator first = getHandleAnimator(view, 0, 1.1f, isLeft, 750,

                    new PathInterpolator(0, 0.45f, .67f, 1f));

            Interpolator secondInterpolator = new PathInterpolator(0.33f, 0, 0.67f, 1f);

            Animator second = getHandleAnimator(view, 1.1f, 0.97f, isLeft, 400,

                    secondInterpolator);

            Animator third = getHandleAnimator(view, 0.97f, 1.02f, isLeft, 400,

                    secondInterpolator);

            Animator fourth = getHandleAnimator(view, 1.02f, 1f, isLeft, 400,

                    secondInterpolator);

            anim.play(first).before(second);

            anim.play(second).before(third);

            anim.play(third).before(fourth);

            anim.start();

        } else {

            view.animate().cancel();

            view.animate().setDuration(400).alpha(0f);