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Fixed a bug with the scrollability of notifications

Browse Source 
The accessibility node info wasn't up to date when we
scrolled into the view, so you could never scroll up
anymore.
This is now fixed.

Change-Id: Ic71e5005edf89e7dc8a9129206342ed97820e687
Fixes: 31545848
This commit is contained in:
Selim Cinek
2016-09-29 17:33:13 -07:00
parent bc243a9627
commit ef40606eb9
1 changed files with 41 additions and 20 deletions
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61
packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
View File

@@ -351,6 +351,8 @@ public class NotificationStackScrollLayout extends ViewGroup
}
};
private boolean mQsExpanded;
private boolean mForwardScrollable;
private boolean mBackwardScrollable;
public NotificationStackScrollLayout(Context context) {
this(context, null);
@@ -596,7 +598,7 @@ public class NotificationStackScrollLayout extends ViewGroup
if (startingPosition < mOwnScrollY) {
// This child starts off screen, so let's keep it offscreen to keep the others visible
mOwnScrollY += childHeight;
setOwnScrollY(mOwnScrollY + childHeight);
}
}
}
@@ -619,7 +621,7 @@ public class NotificationStackScrollLayout extends ViewGroup
// Only apply the scroll if we're scrolling the view upwards, or the view is so far up
// that it is not visible anymore.
if (mOwnScrollY < targetScroll || outOfViewScroll < mOwnScrollY) {
mOwnScrollY = targetScroll;
setOwnScrollY(targetScroll);
}
}
}
@@ -639,7 +641,7 @@ public class NotificationStackScrollLayout extends ViewGroup
private void clampScrollPosition() {
int scrollRange = getScrollRange();
if (scrollRange < mOwnScrollY) {
mOwnScrollY = scrollRange;
setOwnScrollY(scrollRange);
}
}
@@ -1406,7 +1408,7 @@ public class NotificationStackScrollLayout extends ViewGroup
false /* onTop */,
false /* animate */);
}
mOwnScrollY = range;
setOwnScrollY(range);
scrollAmount = 0.0f;
}
return scrollAmount;
@@ -1437,7 +1439,7 @@ public class NotificationStackScrollLayout extends ViewGroup
setOverScrolledPixels(currentTopPixels - newScrollY,
true /* onTop */,
false /* animate */);
mOwnScrollY = 0;
setOwnScrollY(0);
scrollAmount = 0.0f;
}
return scrollAmount;
@@ -1652,7 +1654,7 @@ public class NotificationStackScrollLayout extends ViewGroup
}
private void customScrollTo(int y) {
mOwnScrollY = y;
setOwnScrollY(y);
updateChildren();
}
@@ -1663,7 +1665,7 @@ public class NotificationStackScrollLayout extends ViewGroup
final int oldX = mScrollX;
final int oldY = mOwnScrollY;
mScrollX = scrollX;
mOwnScrollY = scrollY;
setOwnScrollY(scrollY);
if (clampedY) {
springBack();
} else {
@@ -1693,12 +1695,12 @@ public class NotificationStackScrollLayout extends ViewGroup
if (overScrolledTop) {
onTop = true;
newAmount = -mOwnScrollY;
mOwnScrollY = 0;
setOwnScrollY(0);
mDontReportNextOverScroll = true;
} else {
onTop = false;
newAmount = mOwnScrollY - scrollRange;
mOwnScrollY = scrollRange;
setOwnScrollY(scrollRange);
}
setOverScrollAmount(newAmount, onTop, false);
setOverScrollAmount(0.0f, onTop, true);
@@ -1826,6 +1828,19 @@ public class NotificationStackScrollLayout extends ViewGroup
if (scrollable != mScrollable) {
mScrollable = scrollable;
setFocusable(scrollable);
updateForwardAndBackwardScrollability();
}
}
private void updateForwardAndBackwardScrollability() {
boolean forwardScrollable = mScrollable && mOwnScrollY < getScrollRange();
boolean backwardsScrollable = mScrollable && mOwnScrollY > 0;
boolean changed = forwardScrollable != mForwardScrollable
|| backwardsScrollable != mBackwardScrollable;
mForwardScrollable = forwardScrollable;
mBackwardScrollable = backwardsScrollable;
if (changed) {
sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
}
}
@@ -2084,13 +2099,13 @@ public class NotificationStackScrollLayout extends ViewGroup
float topAmount = getCurrentOverScrollAmount(true);
float bottomAmount = getCurrentOverScrollAmount(false);
if (velocityY < 0 && topAmount > 0) {
mOwnScrollY -= (int) topAmount;
setOwnScrollY(mOwnScrollY - (int) topAmount);
mDontReportNextOverScroll = true;
setOverScrollAmount(0, true, false);
mMaxOverScroll = Math.abs(velocityY) / 1000f * getRubberBandFactor(true /* onTop */)
* mOverflingDistance + topAmount;
} else if (velocityY > 0 && bottomAmount > 0) {
mOwnScrollY += bottomAmount;
setOwnScrollY((int) (mOwnScrollY + bottomAmount));
setOverScrollAmount(0, false, false);
mMaxOverScroll = Math.abs(velocityY) / 1000f
* getRubberBandFactor(false /* onTop */) * mOverflingDistance
@@ -2441,11 +2456,11 @@ public class NotificationStackScrollLayout extends ViewGroup
if (endPosition <= mOwnScrollY) {
// This child is fully scrolled of the top, so we have to deduct its height from the
// scrollPosition
mOwnScrollY -= childHeight;
setOwnScrollY(mOwnScrollY - childHeight);
} else if (startingPosition < mOwnScrollY) {
// This child is currently being scrolled into, set the scroll position to the start of
// this child
mOwnScrollY = startingPosition;
setOwnScrollY(startingPosition);
}
}
@@ -3026,7 +3041,7 @@ public class NotificationStackScrollLayout extends ViewGroup
public void onExpansionStopped() {
mIsExpansionChanging = false;
if (!mIsExpanded) {
mOwnScrollY = 0;
setOwnScrollY(0);
mPhoneStatusBar.resetUserExpandedStates();
// lets make sure nothing is in the overlay / transient anymore
@@ -3059,7 +3074,7 @@ public class NotificationStackScrollLayout extends ViewGroup
public void resetScrollPosition() {
mScroller.abortAnimation();
mOwnScrollY = 0;
setOwnScrollY(0);
}
private void setIsExpanded(boolean isExpanded) {
@@ -3128,7 +3143,7 @@ public class NotificationStackScrollLayout extends ViewGroup
}
int stackEnd = getStackEndPosition();
if (endPosition > stackEnd) {
mOwnScrollY += endPosition - stackEnd;
setOwnScrollY((int) (mOwnScrollY + endPosition - stackEnd));
mDisallowScrollingInThisMotion = true;
}
}
@@ -3690,15 +3705,14 @@ public class NotificationStackScrollLayout extends ViewGroup
@Override
public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) {
super.onInitializeAccessibilityNodeInfoInternal(info);
final int scrollRange = getScrollRange();
if (scrollRange > 0) {
if (mScrollable) {
info.setScrollable(true);
if (mScrollY > 0) {
if (mBackwardScrollable) {
info.addAction(
AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_BACKWARD);
info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_UP);
}
if (mScrollY < scrollRange) {
if (mForwardScrollable) {
info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_FORWARD);
info.addAction(AccessibilityNodeInfo.AccessibilityAction.ACTION_SCROLL_DOWN);
}
@@ -3874,6 +3888,13 @@ public class NotificationStackScrollLayout extends ViewGroup
updateAlgorithmLayoutMinHeight();
}
public void setOwnScrollY(int ownScrollY) {
if (ownScrollY != mOwnScrollY) {
mOwnScrollY = ownScrollY;
updateForwardAndBackwardScrollability();
}
}
/**
* A listener that is notified when some child locations might have changed.
*/