1 files changed, 505 insertions, 0 deletions
diff --git a/java/com/android/incallui/answer/impl/affordance/SwipeButtonView.java b/java/com/android/incallui/answer/impl/affordance/SwipeButtonView.java
new file mode 100644
index 000000000..46879ea3f
--- /dev/null
+++ b/java/com/android/incallui/answer/impl/affordance/SwipeButtonView.java
@@ -0,0 +1,505 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.incallui.answer.impl.affordance;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ArgbEvaluator;
+import android.animation.PropertyValuesHolder;
+import android.animation.ValueAnimator;
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.drawable.Drawable;
+import android.support.annotation.Nullable;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewAnimationUtils;
+import android.view.animation.Interpolator;
+import android.widget.ImageView;
+import com.android.incallui.answer.impl.utils.FlingAnimationUtils;
+import com.android.incallui.answer.impl.utils.Interpolators;
+
+/** Button that allows swiping to trigger */
+public class SwipeButtonView extends ImageView {
+
+  private static final long CIRCLE_APPEAR_DURATION = 80;
+  private static final long CIRCLE_DISAPPEAR_MAX_DURATION = 200;
+  private static final long NORMAL_ANIMATION_DURATION = 200;
+  public static final float MAX_ICON_SCALE_AMOUNT = 1.5f;
+  public static final float MIN_ICON_SCALE_AMOUNT = 0.8f;
+
+  private final int minBackgroundRadius;
+  private final Paint circlePaint;
+  private final int inverseColor;
+  private final int normalColor;
+  private final ArgbEvaluator colorInterpolator;
+  private final FlingAnimationUtils flingAnimationUtils;
+  private float circleRadius;
+  private int centerX;
+  private int centerY;
+  private ValueAnimator circleAnimator;
+  private ValueAnimator alphaAnimator;
+  private ValueAnimator scaleAnimator;
+  private float circleStartValue;
+  private boolean circleWillBeHidden;
+  private int[] tempPoint = new int[2];
+  private float tmageScale = 1f;
+  private int circleColor;
+  private View previewView;
+  private float circleStartRadius;
+  private float maxCircleSize;
+  private Animator previewClipper;
+  private float restingAlpha = SwipeButtonHelper.SWIPE_RESTING_ALPHA_AMOUNT;
+  private boolean finishing;
+  private boolean launchingAffordance;
+
+  private AnimatorListenerAdapter clipEndListener =
+      new AnimatorListenerAdapter() {
+        @Override
+        public void onAnimationEnd(Animator animation) {
+          previewClipper = null;
+        }
+      };
+  private AnimatorListenerAdapter circleEndListener =
+      new AnimatorListenerAdapter() {
+        @Override
+        public void onAnimationEnd(Animator animation) {
+          circleAnimator = null;
+        }
+      };
+  private AnimatorListenerAdapter scaleEndListener =
+      new AnimatorListenerAdapter() {
+        @Override
+        public void onAnimationEnd(Animator animation) {
+          scaleAnimator = null;
+        }
+      };
+  private AnimatorListenerAdapter alphaEndListener =
+      new AnimatorListenerAdapter() {
+        @Override
+        public void onAnimationEnd(Animator animation) {
+          alphaAnimator = null;
+        }
+      };
+
+  public SwipeButtonView(Context context) {
+    this(context, null);
+  }
+
+  public SwipeButtonView(Context context, AttributeSet attrs) {
+    this(context, attrs, 0);
+  }
+
+  public SwipeButtonView(Context context, AttributeSet attrs, int defStyleAttr) {
+    this(context, attrs, defStyleAttr, 0);
+  }
+
+  public SwipeButtonView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+    super(context, attrs, defStyleAttr, defStyleRes);
+    circlePaint = new Paint();
+    circlePaint.setAntiAlias(true);
+    circleColor = 0xffffffff;
+    circlePaint.setColor(circleColor);
+
+    normalColor = 0xffffffff;
+    inverseColor = 0xff000000;
+    minBackgroundRadius =
+        context
+            .getResources()
+            .getDimensionPixelSize(R.dimen.answer_affordance_min_background_radius);
+    colorInterpolator = new ArgbEvaluator();
+    flingAnimationUtils = new FlingAnimationUtils(context, 0.3f);
+  }
+
+  @Override
+  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+    super.onLayout(changed, left, top, right, bottom);
+    centerX = getWidth() / 2;
+    centerY = getHeight() / 2;
+    maxCircleSize = getMaxCircleSize();
+  }
+
+  @Override
+  protected void onDraw(Canvas canvas) {
+    drawBackgroundCircle(canvas);
+    canvas.save();
+    canvas.scale(tmageScale, tmageScale, getWidth() / 2, getHeight() / 2);
+    super.onDraw(canvas);
+    canvas.restore();
+  }
+
+  public void setPreviewView(@Nullable View v) {
+    View oldPreviewView = previewView;
+    previewView = v;
+    if (previewView != null) {
+      previewView.setVisibility(launchingAffordance ? oldPreviewView.getVisibility() : INVISIBLE);
+    }
+  }
+
+  private void updateIconColor() {
+    Drawable drawable = getDrawable().mutate();
+    float alpha = circleRadius / minBackgroundRadius;
+    alpha = Math.min(1.0f, alpha);
+    int color = (int) colorInterpolator.evaluate(alpha, normalColor, inverseColor);
+    drawable.setColorFilter(color, PorterDuff.Mode.SRC_ATOP);
+  }
+
+  private void drawBackgroundCircle(Canvas canvas) {
+    if (circleRadius > 0 || finishing) {
+      updateCircleColor();
+      canvas.drawCircle(centerX, centerY, circleRadius, circlePaint);
+    }
+  }
+
+  private void updateCircleColor() {
+    float fraction =
+        0.5f
+            + 0.5f
+                * Math.max(
+                    0.0f,
+                    Math.min(
+                        1.0f, (circleRadius - minBackgroundRadius) / (0.5f * minBackgroundRadius)));
+    if (previewView != null && previewView.getVisibility() == VISIBLE) {
+      float finishingFraction =
+          1 - Math.max(0, circleRadius - circleStartRadius) / (maxCircleSize - circleStartRadius);
+      fraction *= finishingFraction;
+    }
+    int color =
+        Color.argb(
+            (int) (Color.alpha(circleColor) * fraction),
+            Color.red(circleColor),
+            Color.green(circleColor),
+            Color.blue(circleColor));
+    circlePaint.setColor(color);
+  }
+
+  public void finishAnimation(float velocity, @Nullable final Runnable mAnimationEndRunnable) {
+    cancelAnimator(circleAnimator);
+    cancelAnimator(previewClipper);
+    finishing = true;
+    circleStartRadius = circleRadius;
+    final float maxCircleSize = getMaxCircleSize();
+    Animator animatorToRadius;
+    animatorToRadius = getAnimatorToRadius(maxCircleSize);
+    flingAnimationUtils.applyDismissing(
+        animatorToRadius, circleRadius, maxCircleSize, velocity, maxCircleSize);
+    animatorToRadius.addListener(
+        new AnimatorListenerAdapter() {
+          @Override
+          public void onAnimationEnd(Animator animation) {
+            if (mAnimationEndRunnable != null) {
+              mAnimationEndRunnable.run();
+            }
+            finishing = false;
+            circleRadius = maxCircleSize;
+            invalidate();
+          }
+        });
+    animatorToRadius.start();
+    setImageAlpha(0, true);
+    if (previewView != null) {
+      previewView.setVisibility(View.VISIBLE);
+      previewClipper =
+          ViewAnimationUtils.createCircularReveal(
+              previewView, getLeft() + centerX, getTop() + centerY, circleRadius, maxCircleSize);
+      flingAnimationUtils.applyDismissing(
+          previewClipper, circleRadius, maxCircleSize, velocity, maxCircleSize);
+      previewClipper.addListener(clipEndListener);
+      previewClipper.start();
+    }
+  }
+
+  public void instantFinishAnimation() {
+    cancelAnimator(previewClipper);
+    if (previewView != null) {
+      previewView.setClipBounds(null);
+      previewView.setVisibility(View.VISIBLE);
+    }
+    circleRadius = getMaxCircleSize();
+    setImageAlpha(0, false);
+    invalidate();
+  }
+
+  private float getMaxCircleSize() {
+    getLocationInWindow(tempPoint);
+    float rootWidth = getRootView().getWidth();
+    float width = tempPoint[0] + centerX;
+    width = Math.max(rootWidth - width, width);
+    float height = tempPoint[1] + centerY;
+    return (float) Math.hypot(width, height);
+  }
+
+  public void setCircleRadius(float circleRadius) {
+    setCircleRadius(circleRadius, false, false);
+  }
+
+  public void setCircleRadius(float circleRadius, boolean slowAnimation) {
+    setCircleRadius(circleRadius, slowAnimation, false);
+  }
+
+  public void setCircleRadiusWithoutAnimation(float circleRadius) {
+    cancelAnimator(circleAnimator);
+    setCircleRadius(circleRadius, false, true);
+  }
+
+  private void setCircleRadius(float circleRadius, boolean slowAnimation, boolean noAnimation) {
+
+    // Check if we need a new animation
+    boolean radiusHidden =
+        (circleAnimator != null && circleWillBeHidden)
+            || (circleAnimator == null && this.circleRadius == 0.0f);
+    boolean nowHidden = circleRadius == 0.0f;
+    boolean radiusNeedsAnimation = (radiusHidden != nowHidden) && !noAnimation;
+    if (!radiusNeedsAnimation) {
+      if (circleAnimator == null) {
+        this.circleRadius = circleRadius;
+        updateIconColor();
+        invalidate();
+        if (nowHidden) {
+          if (previewView != null) {
+            previewView.setVisibility(View.INVISIBLE);
+          }
+        }
+      } else if (!circleWillBeHidden) {
+
+        // We just update the end value
+        float diff = circleRadius - minBackgroundRadius;
+        PropertyValuesHolder[] values = circleAnimator.getValues();
+        values[0].setFloatValues(circleStartValue + diff, circleRadius);
+        circleAnimator.setCurrentPlayTime(circleAnimator.getCurrentPlayTime());
+      }
+    } else {
+      cancelAnimator(circleAnimator);
+      cancelAnimator(previewClipper);
+      ValueAnimator animator = getAnimatorToRadius(circleRadius);
+      Interpolator interpolator =
+          circleRadius == 0.0f
+              ? Interpolators.FAST_OUT_LINEAR_IN
+              : Interpolators.LINEAR_OUT_SLOW_IN;
+      animator.setInterpolator(interpolator);
+      long duration = 250;
+      if (!slowAnimation) {
+        float durationFactor =
+            Math.abs(this.circleRadius - circleRadius) / (float) minBackgroundRadius;
+        duration = (long) (CIRCLE_APPEAR_DURATION * durationFactor);
+        duration = Math.min(duration, CIRCLE_DISAPPEAR_MAX_DURATION);
+      }
+      animator.setDuration(duration);
+      animator.start();
+      if (previewView != null && previewView.getVisibility() == View.VISIBLE) {
+        previewView.setVisibility(View.VISIBLE);
+        previewClipper =
+            ViewAnimationUtils.createCircularReveal(
+                previewView,
+                getLeft() + centerX,
+                getTop() + centerY,
+                this.circleRadius,
+                circleRadius);
+        previewClipper.setInterpolator(interpolator);
+        previewClipper.setDuration(duration);
+        previewClipper.addListener(clipEndListener);
+        previewClipper.addListener(
+            new AnimatorListenerAdapter() {
+              @Override
+              public void onAnimationEnd(Animator animation) {
+                previewView.setVisibility(View.INVISIBLE);
+              }
+            });
+        previewClipper.start();
+      }
+    }
+  }
+
+  private ValueAnimator getAnimatorToRadius(float circleRadius) {
+    ValueAnimator animator = ValueAnimator.ofFloat(this.circleRadius, circleRadius);
+    circleAnimator = animator;
+    circleStartValue = this.circleRadius;
+    circleWillBeHidden = circleRadius == 0.0f;
+    animator.addUpdateListener(
+        new ValueAnimator.AnimatorUpdateListener() {
+          @Override
+          public void onAnimationUpdate(ValueAnimator animation) {
+            SwipeButtonView.this.circleRadius = (float) animation.getAnimatedValue();
+            updateIconColor();
+            invalidate();
+          }
+        });
+    animator.addListener(circleEndListener);
+    return animator;
+  }
+
+  private void cancelAnimator(Animator animator) {
+    if (animator != null) {
+      animator.cancel();
+    }
+  }
+
+  public void setImageScale(float imageScale, boolean animate) {
+    setImageScale(imageScale, animate, -1, null);
+  }
+
+  /**
+   * Sets the scale of the containing image
+   *
+   * @param imageScale The new Scale.
+   * @param animate Should an animation be performed
+   * @param duration If animate, whats the duration? When -1 we take the default duration
+   * @param interpolator If animate, whats the interpolator? When null we take the default
+   *     interpolator.
+   */
+  public void setImageScale(
+      float imageScale, boolean animate, long duration, @Nullable Interpolator interpolator) {
+    cancelAnimator(scaleAnimator);
+    if (!animate) {
+      tmageScale = imageScale;
+      invalidate();
+    } else {
+      ValueAnimator animator = ValueAnimator.ofFloat(tmageScale, imageScale);
+      scaleAnimator = animator;
+      animator.addUpdateListener(
+          new ValueAnimator.AnimatorUpdateListener() {
+            @Override
+            public void onAnimationUpdate(ValueAnimator animation) {
+              tmageScale = (float) animation.getAnimatedValue();
+              invalidate();
+            }
+          });
+      animator.addListener(scaleEndListener);
+      if (interpolator == null) {
+        interpolator =
+            imageScale == 0.0f
+                ? Interpolators.FAST_OUT_LINEAR_IN
+                : Interpolators.LINEAR_OUT_SLOW_IN;
+      }
+      animator.setInterpolator(interpolator);
+      if (duration == -1) {
+        float durationFactor = Math.abs(tmageScale - imageScale) / (1.0f - MIN_ICON_SCALE_AMOUNT);
+        durationFactor = Math.min(1.0f, durationFactor);
+        duration = (long) (NORMAL_ANIMATION_DURATION * durationFactor);
+      }
+      animator.setDuration(duration);
+      animator.start();
+    }
+  }
+
+  public void setRestingAlpha(float alpha) {
+    restingAlpha = alpha;
+
+    // TODO: Handle the case an animation is playing.
+    setImageAlpha(alpha, false);
+  }
+
+  public float getRestingAlpha() {
+    return restingAlpha;
+  }
+
+  public void setImageAlpha(float alpha, boolean animate) {
+    setImageAlpha(alpha, animate, -1, null, null);
+  }
+
+  /**
+   * Sets the alpha of the containing image
+   *
+   * @param alpha The new alpha.
+   * @param animate Should an animation be performed
+   * @param duration If animate, whats the duration? When -1 we take the default duration
+   * @param interpolator If animate, whats the interpolator? When null we take the default
+   *     interpolator.
+   */
+  public void setImageAlpha(
+      float alpha,
+      boolean animate,
+      long duration,
+      @Nullable Interpolator interpolator,
+      @Nullable Runnable runnable) {
+    cancelAnimator(alphaAnimator);
+    alpha = launchingAffordance ? 0 : alpha;
+    int endAlpha = (int) (alpha * 255);
+    final Drawable background = getBackground();
+    if (!animate) {
+      if (background != null) {
+        background.mutate().setAlpha(endAlpha);
+      }
+      setImageAlpha(endAlpha);
+    } else {
+      int currentAlpha = getImageAlpha();
+      ValueAnimator animator = ValueAnimator.ofInt(currentAlpha, endAlpha);
+      alphaAnimator = animator;
+      animator.addUpdateListener(
+          new ValueAnimator.AnimatorUpdateListener() {
+            @Override
+            public void onAnimationUpdate(ValueAnimator animation) {
+              int alpha = (int) animation.getAnimatedValue();
+              if (background != null) {
+                background.mutate().setAlpha(alpha);
+              }
+              setImageAlpha(alpha);
+            }
+          });
+      animator.addListener(alphaEndListener);
+      if (interpolator == null) {
+        interpolator =
+            alpha == 0.0f ? Interpolators.FAST_OUT_LINEAR_IN : Interpolators.LINEAR_OUT_SLOW_IN;
+      }
+      animator.setInterpolator(interpolator);
+      if (duration == -1) {
+        float durationFactor = Math.abs(currentAlpha - endAlpha) / 255f;
+        durationFactor = Math.min(1.0f, durationFactor);
+        duration = (long) (NORMAL_ANIMATION_DURATION * durationFactor);
+      }
+      animator.setDuration(duration);
+      if (runnable != null) {
+        animator.addListener(getEndListener(runnable));
+      }
+      animator.start();
+    }
+  }
+
+  private Animator.AnimatorListener getEndListener(final Runnable runnable) {
+    return new AnimatorListenerAdapter() {
+      boolean mCancelled;
+
+      @Override
+      public void onAnimationCancel(Animator animation) {
+        mCancelled = true;
+      }
+
+      @Override
+      public void onAnimationEnd(Animator animation) {
+        if (!mCancelled) {
+          runnable.run();
+        }
+      }
+    };
+  }
+
+  public float getCircleRadius() {
+    return circleRadius;
+  }
+
+  @Override
+  public boolean performClick() {
+    return isClickable() && super.performClick();
+  }
+
+  public void setLaunchingAffordance(boolean launchingAffordance) {
+    this.launchingAffordance = launchingAffordance;
+  }
+}