Merge "Improve interaction around showing / hiding the gear behind notifications" into nyc-dev

3 files changed, 258 insertions, 92 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/SwipeHelper.java b/packages/SystemUI/src/com/android/systemui/SwipeHelper.java
index 1fe218a885fb..81ba23f27f23 100644
--- a/packages/SystemUI/src/com/android/systemui/SwipeHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/SwipeHelper.java
@@ -517,35 +517,16 @@ public class SwipeHelper implements Gefingerpoken {
                 break;
             case MotionEvent.ACTION_UP:
             case MotionEvent.ACTION_CANCEL:
-                if (mCurrView != null) {
-                    float maxVelocity = MAX_DISMISS_VELOCITY * mDensityScale;
-                    mVelocityTracker.computeCurrentVelocity(1000 /* px/sec */, maxVelocity);
-                    float escapeVelocity = SWIPE_ESCAPE_VELOCITY * mDensityScale;
-                    float velocity = getVelocity(mVelocityTracker);
-                    float perpendicularVelocity = getPerpendicularVelocity(mVelocityTracker);
-
-                    float translation = getTranslation(mCurrView);
-                    // Decide whether to dismiss the current view
-                    boolean childSwipedFarEnough = DISMISS_IF_SWIPED_FAR_ENOUGH &&
-                            Math.abs(translation) > 0.4 * getSize(mCurrView);
-                    boolean childSwipedFastEnough = (Math.abs(velocity) > escapeVelocity) &&
-                            (Math.abs(velocity) > Math.abs(perpendicularVelocity)) &&
-                            (velocity > 0) == (translation > 0);
-                    boolean falsingDetected = mCallback.isAntiFalsingNeeded();
-
-                    if (mFalsingManager.isClassiferEnabled()) {
-                        falsingDetected = falsingDetected && mFalsingManager.isFalseTouch();
-                    } else {
-                        falsingDetected = falsingDetected && !mTouchAboveFalsingThreshold;
-                    }
-
-                    boolean dismissChild = mCallback.canChildBeDismissed(mCurrView)
-                            && !falsingDetected && (childSwipedFastEnough || childSwipedFarEnough)
-                            && ev.getActionMasked() == MotionEvent.ACTION_UP;
+                if (mCurrView == null) {
+                    break;
+                }
+                mVelocityTracker.computeCurrentVelocity(1000 /* px/sec */, getMaxVelocity());
+                float velocity = getVelocity(mVelocityTracker);
 
-                    if (dismissChild) {
+                if (!handleUpEvent(ev, mCurrView, velocity, getTranslation(mCurrView))) {
+                    if (isDismissGesture(ev)) {
                         // flingadingy
-                        dismissChild(mCurrView, childSwipedFastEnough ? velocity : 0f);
+                        dismissChild(mCurrView, swipedFastEnough() ? velocity : 0f);
                     } else {
                         // snappity
                         mCallback.onDragCancelled(mCurrView);
@@ -562,6 +543,46 @@ public class SwipeHelper implements Gefingerpoken {
         return (int) (mFalsingThreshold * factor);
     }
 
+    private float getMaxVelocity() {
+        return MAX_DISMISS_VELOCITY * mDensityScale;
+    }
+
+    protected float getEscapeVelocity() {
+        return SWIPE_ESCAPE_VELOCITY * mDensityScale;
+    }
+
+    protected boolean swipedFarEnough() {
+        float translation = getTranslation(mCurrView);
+        return DISMISS_IF_SWIPED_FAR_ENOUGH && Math.abs(translation) > 0.4 * getSize(mCurrView);
+    }
+
+    protected boolean isDismissGesture(MotionEvent ev) {
+        boolean falsingDetected = mCallback.isAntiFalsingNeeded();
+        if (mFalsingManager.isClassiferEnabled()) {
+            falsingDetected = falsingDetected && mFalsingManager.isFalseTouch();
+        } else {
+            falsingDetected = falsingDetected && !mTouchAboveFalsingThreshold;
+        }
+        return !falsingDetected && (swipedFastEnough() || swipedFarEnough())
+                && ev.getActionMasked() == MotionEvent.ACTION_UP
+                && mCallback.canChildBeDismissed(mCurrView);
+    }
+
+    protected boolean swipedFastEnough() {
+        float velocity = getVelocity(mVelocityTracker);
+        float perpendicularVelocity = getPerpendicularVelocity(mVelocityTracker);
+        float translation = getTranslation(mCurrView);
+        boolean ret = (Math.abs(velocity) > getEscapeVelocity()) &&
+                (Math.abs(velocity) > Math.abs(perpendicularVelocity)) &&
+                (velocity > 0) == (translation > 0);
+        return ret;
+    }
+
+    protected boolean handleUpEvent(MotionEvent ev, View animView, float velocity,
+            float translation) {
+        return false;
+    }
+
     public interface Callback {
         View getChildAtPosition(MotionEvent ev);
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationSettingsIconRow.java b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationSettingsIconRow.java
index 375459f0f30c..fcc48bf8d510 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/NotificationSettingsIconRow.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/NotificationSettingsIconRow.java
@@ -29,11 +29,18 @@ import com.android.systemui.R;
 
 public class NotificationSettingsIconRow extends FrameLayout implements View.OnClickListener {
 
+    private static final int GEAR_ALPHA_ANIM_DURATION = 200;
+
     public interface SettingsIconRowListener {
         /**
          * Called when the gear behind a notification is touched.
          */
         public void onGearTouched(ExpandableNotificationRow row, int x, int y);
+
+        /**
+         * Called when a notification is slid back over the gear.
+         */
+        public void onSettingsIconRowReset(NotificationSettingsIconRow row);
     }
 
     private ExpandableNotificationRow mParent;
@@ -45,6 +52,8 @@ public class NotificationSettingsIconRow extends FrameLayout implements View.OnC
     private boolean mSettingsFadedIn = false;
     private boolean mAnimating = false;
     private boolean mOnLeft = true;
+    private boolean mDismissing = false;
+    private boolean mSnapping = false;
     private int[] mGearLocation = new int[2];
     private int[] mParentLocation = new int[2];
 
@@ -78,8 +87,14 @@ public class NotificationSettingsIconRow extends FrameLayout implements View.OnC
 
     public void resetState() {
         setGearAlpha(0f);
+        mSettingsFadedIn = false;
         mAnimating = false;
+        mSnapping = false;
+        mDismissing = false;
         setIconLocation(true /* on left */);
+        if (mListener != null) {
+            mListener.onSettingsIconRowReset(this);
+        }
     }
 
     public void setGearListener(SettingsIconRowListener listener) {
@@ -94,20 +109,24 @@ public class NotificationSettingsIconRow extends FrameLayout implements View.OnC
         return mParent;
     }
 
-    private void setGearAlpha(float alpha) {
+    public void setGearAlpha(float alpha) {
         if (alpha == 0) {
             mSettingsFadedIn = false; // Can fade in again once it's gone.
             setVisibility(View.INVISIBLE);
         } else {
-            if (alpha == 1) {
-                mSettingsFadedIn = true;
-            }
             setVisibility(View.VISIBLE);
         }
         mGearIcon.setAlpha(alpha);
     }
 
     /**
+     * Returns whether the icon is on the left side of the view or not.
+     */
+    public boolean isIconOnLeft() {
+        return mOnLeft;
+    }
+
+    /**
      * Returns the horizontal space in pixels required to display the gear behind a notification.
      */
     public float getSpaceForGear() {
@@ -119,7 +138,7 @@ public class NotificationSettingsIconRow extends FrameLayout implements View.OnC
      * if entire view is visible.
      */
     public boolean isVisible() {
-        return mSettingsFadedIn;
+        return mGearIcon.getAlpha() > 0;
     }
 
     public void cancelFadeAnimator() {
@@ -129,16 +148,18 @@ public class NotificationSettingsIconRow extends FrameLayout implements View.OnC
     }
 
     public void updateSettingsIcons(final float transX, final float size) {
-        if (mAnimating || (mGearIcon.getAlpha() == 0)) {
-            // Don't adjust when animating or settings aren't visible
+        if (mAnimating || !mSettingsFadedIn) {
+            // Don't adjust when animating, or if the gear hasn't been shown yet.
             return;
         }
-        setIconLocation(transX > 0 /* fromLeft */);
+
         final float fadeThreshold = size * 0.3f;
         final float absTrans = Math.abs(transX);
         float desiredAlpha = 0;
 
-        if (absTrans <= fadeThreshold) {
+        if (absTrans == 0) {
+            desiredAlpha = 0;
+        } else if (absTrans <= fadeThreshold) {
             desiredAlpha = 1;
         } else {
             desiredAlpha = 1 - ((absTrans - fadeThreshold) / (size - fadeThreshold));
@@ -148,6 +169,12 @@ public class NotificationSettingsIconRow extends FrameLayout implements View.OnC
 
     public void fadeInSettings(final boolean fromLeft, final float transX,
             final float notiThreshold) {
+        if (mDismissing || mAnimating) {
+            return;
+        }
+        if (isIconLocationChange(transX)) {
+            setGearAlpha(0f);
+        }
         setIconLocation(transX > 0 /* fromLeft */);
         mFadeAnimator = ValueAnimator.ofFloat(mGearIcon.getAlpha(), 1);
         mFadeAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@@ -164,40 +191,53 @@ public class NotificationSettingsIconRow extends FrameLayout implements View.OnC
         });
         mFadeAnimator.addListener(new AnimatorListenerAdapter() {
             @Override
-            public void onAnimationCancel(Animator animation) {
-                super.onAnimationCancel(animation);
-                mAnimating = false;
-                mSettingsFadedIn = false;
+            public void onAnimationStart(Animator animation) {
+                mAnimating = true;
             }
 
             @Override
-            public void onAnimationStart(Animator animation) {
-                super.onAnimationStart(animation);
-                mAnimating = true;
+            public void onAnimationCancel(Animator animation) {
+                // TODO should animate back to 0f from current alpha
+                mGearIcon.setAlpha(0f);
             }
 
             @Override
             public void onAnimationEnd(Animator animation) {
-                super.onAnimationEnd(animation);
                 mAnimating = false;
-                mSettingsFadedIn = true;
+                mSettingsFadedIn = mGearIcon.getAlpha() == 1;
             }
         });
         mFadeAnimator.setInterpolator(Interpolators.ALPHA_IN);
-        mFadeAnimator.setDuration(200);
+        mFadeAnimator.setDuration(GEAR_ALPHA_ANIM_DURATION);
         mFadeAnimator.start();
     }
 
-    private void setIconLocation(boolean onLeft) {
-        if (onLeft == mOnLeft) {
+    public void setIconLocation(boolean onLeft) {
+        if (onLeft == mOnLeft || mSnapping) {
             // Same side? Do nothing.
             return;
         }
-
         setTranslationX(onLeft ? 0 : (mParent.getWidth() - mHorizSpaceForGear));
         mOnLeft = onLeft;
     }
 
+    public boolean isIconLocationChange(float translation) {
+        boolean onLeft = translation > mGearIcon.getPaddingStart();
+        boolean onRight = translation < -mGearIcon.getPaddingStart();
+        if ((mOnLeft && onRight) || (!mOnLeft && onLeft)) {
+            return true;
+        }
+        return false;
+    }
+
+    public void setDismissing() {
+        mDismissing = true;
+    }
+
+    public void setSnapping(boolean snapping) {
+        mSnapping = snapping;
+    }
+
     @Override
     public void onClick(View v) {
         if (v.getId() == R.id.gear_icon) {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
index 2da47874b49b..4cb0dea118ac 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
@@ -372,6 +372,11 @@ public class NotificationStackScrollLayout extends ViewGroup
     }
 
     @Override
+    public void onSettingsIconRowReset(NotificationSettingsIconRow row) {
+        mSwipeHelper.setSnappedToGear(false);
+    }
+
+    @Override
     protected void onDraw(Canvas canvas) {
         canvas.drawRect(0, mCurrentBounds.top, getWidth(), mCurrentBounds.bottom, mBackgroundPaint);
         if (DEBUG) {
@@ -717,11 +722,15 @@ public class NotificationStackScrollLayout extends ViewGroup
             mDragAnimPendingChildren.remove(animView);
         }
 
-        if (targetLeft == 0 && mCurrIconRow != null) {
-            mCurrIconRow.resetState();
-            mCurrIconRow = null;
-            if (mGearExposedView != null && mGearExposedView == mTranslatingParentView) {
-                mGearExposedView = null;
+        if (mCurrIconRow != null) {
+            if (targetLeft == 0) {
+                mCurrIconRow.resetState();
+                mCurrIconRow = null;
+                if (mGearExposedView != null && mGearExposedView == mTranslatingParentView) {
+                    mGearExposedView = null;
+                }
+            } else {
+                mSwipeHelper.setSnappedToGear(true);
             }
         }
     }
@@ -3379,15 +3388,11 @@ public class NotificationStackScrollLayout extends ViewGroup
     }
 
     private class NotificationSwipeHelper extends SwipeHelper {
-        private static final int MOVE_STATE_LEFT = -1;
-        private static final int MOVE_STATE_UNDEFINED = 0;
-        private static final int MOVE_STATE_RIGHT = 1;
-
         private static final long GEAR_SHOW_DELAY = 60;
-
         private CheckForDrag mCheckForDrag;
         private Handler mHandler;
-        private int mMoveState = MOVE_STATE_UNDEFINED;
+        private boolean mGearSnappedTo;
+        private boolean mGearSnappedOnLeft;
 
         public NotificationSwipeHelper(int swipeDirection, Callback callback, Context context) {
             super(swipeDirection, callback, context);
@@ -3400,6 +3405,10 @@ public class NotificationStackScrollLayout extends ViewGroup
             mTranslatingParentView = currView;
 
             // Reset check for drag gesture
+            cancelCheckForDrag();
+            if (mCurrIconRow != null) {
+                mCurrIconRow.setSnapping(false);
+            }
             mCheckForDrag = null;
             mCurrIconRow = null;
 
@@ -3411,17 +3420,32 @@ public class NotificationStackScrollLayout extends ViewGroup
                 mCurrIconRow = ((ExpandableNotificationRow) currView).getSettingsRow();
                 mCurrIconRow.setGearListener(NotificationStackScrollLayout.this);
             }
-            mMoveState = MOVE_STATE_UNDEFINED;
         }
 
         @Override
         public void onMoveUpdate(View view, float translation, float delta) {
-            final int newMoveState = (delta < 0) ? MOVE_STATE_RIGHT : MOVE_STATE_LEFT;
-            if (mMoveState != MOVE_STATE_UNDEFINED && mMoveState != newMoveState) {
-                // Changed directions, make sure we check for drag again.
-                mCheckForDrag = null;
+            if (mCurrIconRow != null) {
+                mCurrIconRow.setSnapping(false); // If we're moving, we're not snapping.
+
+                // If the gear is visible and the movement is towards it it's not a location change.
+                boolean onLeft = mGearSnappedTo ? mGearSnappedOnLeft : mCurrIconRow.isIconOnLeft();
+                boolean locationChange = isTowardsGear(translation, onLeft)
+                        ? false : mCurrIconRow.isIconLocationChange(translation);
+                if (locationChange) {
+                    // Don't consider it "snapped" if location has changed.
+                    setSnappedToGear(false);
+
+                    // Changed directions, make sure we check to fade in icon again.
+                    if (!mHandler.hasCallbacks(mCheckForDrag)) {
+                        // No check scheduled, set null to schedule a new one.
+                        mCheckForDrag = null;
+                    } else {
+                        // Check scheduled, reset alpha and update location; check will fade it in
+                        mCurrIconRow.setGearAlpha(0f);
+                        mCurrIconRow.setIconLocation(translation > 0 /* onLeft */);
+                    }
+                }
             }
-            mMoveState = newMoveState;
 
             final boolean gutsExposed = (view instanceof ExpandableNotificationRow)
                     && ((ExpandableNotificationRow) view).areGutsExposed();
@@ -3434,35 +3458,99 @@ public class NotificationStackScrollLayout extends ViewGroup
 
         @Override
         public void dismissChild(final View view, float velocity) {
-            cancelCheckForDrag();
             super.dismissChild(view, velocity);
+            cancelCheckForDrag();
+            setSnappedToGear(false);
         }
 
         @Override
         public void snapChild(final View animView, final float targetLeft, float velocity) {
+            super.snapChild(animView, targetLeft, velocity);
+            if (targetLeft == 0) {
+                cancelCheckForDrag();
+                setSnappedToGear(false);
+            }
+        }
+
+
+        @Override
+        public boolean handleUpEvent(MotionEvent ev, View animView, float velocity,
+                float translation) {
+            if (mCurrIconRow == null) {
+                cancelCheckForDrag();
+                return false; // Let SwipeHelper handle it.
+            }
+
+            boolean gestureTowardsGear = isTowardsGear(velocity, mCurrIconRow.isIconOnLeft());
+            boolean gestureFastEnough = Math.abs(velocity) > getEscapeVelocity();
+
+            if (mGearSnappedTo && mCurrIconRow.isVisible()) {
+                if (mGearSnappedOnLeft == mCurrIconRow.isIconOnLeft()) {
+                    boolean coveringGear =
+                            Math.abs(getTranslation(animView)) <= getSpaceForGear(animView) * 0.6f;
+                    if (gestureTowardsGear || coveringGear) {
+                        // Gesture is towards or covering the gear
+                        snapChild(animView, 0 /* leftTarget */, velocity);
+                    } else if (isDismissGesture(ev)) {
+                        // Gesture is a dismiss that's not towards the gear
+                        dismissChild(animView, swipedFastEnough() ? velocity : 0f);
+                    } else {
+                        // Didn't move enough to dismiss or cover, snap to the gear
+                        snapToGear(animView, velocity);
+                    }
+                } else if ((!gestureFastEnough && swipedEnoughToShowGear(animView))
+                        || (gestureTowardsGear && !swipedFarEnough())) {
+                    // The gear has been snapped to previously, however, the gear is now on the
+                    // other side. If gesture is towards gear and not too far snap to the gear.
+                    snapToGear(animView, velocity);
+                } else {
+                    dismissOrSnapBack(animView, velocity, ev);
+                }
+            } else if ((!gestureFastEnough && swipedEnoughToShowGear(animView))
+                    || gestureTowardsGear) {
+                // Gear has not been snapped to previously and this is gear revealing gesture
+                snapToGear(animView, velocity);
+            } else {
+                dismissOrSnapBack(animView, velocity, ev);
+            }
+            return true;
+        }
+
+        private void dismissOrSnapBack(View animView, float velocity, MotionEvent ev) {
+            if (isDismissGesture(ev)) {
+                dismissChild(animView, swipedFastEnough() ? velocity : 0f);
+            } else {
+                snapChild(animView, 0 /* leftTarget */, velocity);
+            }
+        }
+
+        private void snapToGear(View animView, float velocity) {
+            final float snapBackThreshold = getSpaceForGear(animView);
+            final float target = mCurrIconRow.isIconOnLeft() ? snapBackThreshold
+                    : -snapBackThreshold;
+            mGearExposedView = mTranslatingParentView;
+            if (mGearDisplayedListener != null
+                    && (animView instanceof ExpandableNotificationRow)) {
+                mGearDisplayedListener.onGearDisplayed((ExpandableNotificationRow) animView);
+            }
+            if (mCurrIconRow != null) {
+                mCurrIconRow.setSnapping(true);
+                setSnappedToGear(true);
+            }
+            super.snapChild(animView, target, velocity);
+        }
+
+        private boolean swipedEnoughToShowGear(View animView) {
             final float snapBackThreshold = getSpaceForGear(animView);
             final float translation = getTranslation(animView);
             final boolean fromLeft = translation > 0;
             final float absTrans = Math.abs(translation);
             final float notiThreshold = getSize(mTranslatingParentView) * 0.4f;
 
-            boolean pastGear = (fromLeft && translation >= snapBackThreshold * 0.4f
-                    && translation <= notiThreshold) ||
-                    (!fromLeft && absTrans >= snapBackThreshold * 0.4f
-                            && absTrans <= notiThreshold);
-
-            if (pastGear && !isPinnedHeadsUp(animView)
-                    && (animView instanceof ExpandableNotificationRow)) {
-                // bouncity
-                final float target = fromLeft ? snapBackThreshold : -snapBackThreshold;
-                mGearExposedView = mTranslatingParentView;
-                if (mGearDisplayedListener != null) {
-                    mGearDisplayedListener.onGearDisplayed((ExpandableNotificationRow) animView);
-                }
-                super.snapChild(animView, target, velocity);
-            } else {
-                super.snapChild(animView, 0, velocity);
-            }
+            // If the notification can't be dismissed then how far it can move is
+            // restricted -- reduce the distance it needs to move in this case.
+            final float multiplier = canChildBeDismissed(animView) ? 0.4f : 0.2f;
+            return absTrans >= snapBackThreshold * 0.4f && absTrans <= notiThreshold;
         }
 
         @Override
@@ -3499,6 +3587,25 @@ public class NotificationStackScrollLayout extends ViewGroup
         }
 
         /**
+         * Returns whether the gesture is towards the gear location or not.
+         */
+        private boolean isTowardsGear(float velocity, boolean onLeft) {
+            if (mCurrIconRow == null) {
+                return false;
+            }
+            return mCurrIconRow.isVisible()
+                    && ((onLeft && velocity <= 0) || (!onLeft && velocity >= 0));
+        }
+
+        /**
+         * Indicates the the gear has been snapped to.
+         */
+        private void setSnappedToGear(boolean snapped) {
+            mGearSnappedOnLeft = (mCurrIconRow != null) ? mCurrIconRow.isIconOnLeft() : false;
+            mGearSnappedTo = snapped && mCurrIconRow != null;
+        }
+
+        /**
          * Returns the horizontal space in pixels required to display the gear behind a
          * notification.
          */
@@ -3510,7 +3617,7 @@ public class NotificationStackScrollLayout extends ViewGroup
         }
 
         private void checkForDrag() {
-            if (mCheckForDrag == null) {
+            if (mCheckForDrag == null || !mHandler.hasCallbacks(mCheckForDrag)) {
                 mCheckForDrag = new CheckForDrag();
                 mHandler.postDelayed(mCheckForDrag, GEAR_SHOW_DELAY);
             }
@@ -3521,7 +3628,6 @@ public class NotificationStackScrollLayout extends ViewGroup
                 mCurrIconRow.cancelFadeAnimator();
             }
             mHandler.removeCallbacks(mCheckForDrag);
-            mCheckForDrag = null;
         }
 
         private final class CheckForDrag implements Runnable {
@@ -3531,14 +3637,13 @@ public class NotificationStackScrollLayout extends ViewGroup
                 final float absTransX = Math.abs(translation);
                 final float bounceBackToGearWidth = getSpaceForGear(mTranslatingParentView);
                 final float notiThreshold = getSize(mTranslatingParentView) * 0.4f;
-                if (mCurrIconRow != null && absTransX >= bounceBackToGearWidth * 0.4
+                if ((mCurrIconRow != null && (!mCurrIconRow.isVisible()
+                        || mCurrIconRow.isIconLocationChange(translation)))
+                        && absTransX >= bounceBackToGearWidth * 0.4
                         && absTransX < notiThreshold) {
-                    // Show icon
+                    // Fade in the gear
                     mCurrIconRow.fadeInSettings(translation > 0 /* fromLeft */, translation,
                             notiThreshold);
-                } else {
-                    // Allow more to be posted if this wasn't a drag.
-                    mCheckForDrag = null;
                 }
             }
         }
@@ -3551,7 +3656,7 @@ public class NotificationStackScrollLayout extends ViewGroup
 
             final View prevGearExposedView = mGearExposedView;
             mGearExposedView = null;
-
+            mGearSnappedTo = false;
             Animator anim = getViewTranslationAnimator(prevGearExposedView,
                     0 /* leftTarget */, null /* updateListener */);
             if (anim != null) {