[automerger] Enable accessibility of Clear All button. am: a3e48d8035 (6ad288f9) · Commits · e / os / android_packages_apps_Trebuchet

quickstep/src/com/android/quickstep/views/ClearAllButton.java

+4 −9

Original line number	Diff line number	Diff line
		@@ -16,13 +16,11 @@

		package com.android.quickstep.views;

		import static android.view.accessibility.AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS;

		import android.content.Context;
		import android.graphics.Rect;
		import android.os.Bundle;
		import android.support.annotation.Nullable;
		import android.util.AttributeSet;
		import android.view.accessibility.AccessibilityNodeInfo;
		import android.widget.Button;

		public class ClearAllButton extends Button {
		@@ -37,12 +35,9 @@ public class ClearAllButton extends Button {
		}

		@Override
		public boolean performAccessibilityAction(int action, Bundle arguments) {
		final boolean res = super.performAccessibilityAction(action, arguments);
		if (action == ACTION_ACCESSIBILITY_FOCUS) {
		mRecentsView.revealClearAllButton();
		}
		return res;
		public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
		super.onInitializeAccessibilityNodeInfo(info);
		info.setParent(mRecentsView); // Pretend we are a part of the task carousel.
		}

		@Override

quickstep/src/com/android/quickstep/views/RecentsView.java

+42 −2

Original line number	Diff line number	Diff line
		@@ -39,6 +39,7 @@ import android.graphics.Point;
		import android.graphics.Rect;
		import android.graphics.drawable.Drawable;
		import android.os.Build;
		import android.os.Bundle;
		import android.os.Handler;
		import android.os.UserHandle;
		import android.support.annotation.Nullable;
		@@ -386,7 +387,13 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
		private void updateClearAllButtonAlpha() {
		if (mClearAllButton != null) {
		final float alpha = calculateClearAllButtonAlpha();
		mIsClearAllButtonFullyRevealed = alpha == 1;
		final boolean revealed = alpha == 1;
		if (mIsClearAllButtonFullyRevealed != revealed) {
		mIsClearAllButtonFullyRevealed = revealed;
		mClearAllButton.setImportantForAccessibility(revealed ?
		IMPORTANT_FOR_ACCESSIBILITY_YES :
		IMPORTANT_FOR_ACCESSIBILITY_NO);
		}
		mClearAllButton.setAlpha(alpha * mContentAlpha);
		}
		}
		@@ -1284,8 +1291,31 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
		scrollTo(mIsRtl ? 0 : computeMaxScrollX(), 0);
		}

		@Override
		public boolean performAccessibilityAction(int action, Bundle arguments) {
		if (getChildCount() > 0) {
		switch (action) {
		case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: {
		if (!mIsClearAllButtonFullyRevealed && getCurrentPage() == getPageCount() - 1) {
		revealClearAllButton();
		return true;
		}
		}
		case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: {
		if (mIsClearAllButtonFullyRevealed) {
		setCurrentPage(getChildCount() - 1);
		return true;
		}
		}
		break;
		}
		}
		return super.performAccessibilityAction(action, arguments);
		}

		@Override
		public void addChildrenForAccessibility(ArrayList<View> outChildren) {
		outChildren.add(mClearAllButton);
		for (int i = getChildCount() - 1; i >= 0; --i) {
		outChildren.add(getChildAt(i));
		}
		@@ -1295,6 +1325,13 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
		public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
		super.onInitializeAccessibilityNodeInfo(info);

		if (getChildCount() > 0) {
		info.addAction(mIsClearAllButtonFullyRevealed ?
		AccessibilityNodeInfo.ACTION_SCROLL_FORWARD :
		AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD);
		info.setScrollable(true);
		}

		final AccessibilityNodeInfo.CollectionInfo
		collectionInfo = AccessibilityNodeInfo.CollectionInfo.obtain(
		1, getChildCount(), false,
		@@ -1306,7 +1343,10 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
		public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
		super.onInitializeAccessibilityEvent(event);

		if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
		event.setScrollable(getPageCount() > 0);

		if (!mIsClearAllButtonFullyRevealed
		&& event.getEventType() == AccessibilityEvent.TYPE_VIEW_SCROLLED) {
		final int childCount = getChildCount();
		final int[] visibleTasks = getVisibleChildrenRange();
		event.setFromIndex(childCount - visibleTasks[1] - 1);

quickstep/src/com/android/quickstep/views/RecentsViewContainer.java

+5 −0

Original line number	Diff line number	Diff line
		@@ -124,4 +124,9 @@ public class RecentsViewContainer extends InsettableFrameLayout {
		return mRecentsView.requestFocus(direction, previouslyFocusedRect) \|\|
		super.requestFocus(direction, previouslyFocusedRect);
		}

		@Override
		public void addChildrenForAccessibility(ArrayList<View> outChildren) {
		outChildren.add(mRecentsView);
		}
		}
		No newline at end of file