Merge "Fix EBT helper initialization in LabeledSeekBar class" into nyc-dev (50528a4e) · Commits · e / os / android_packages_apps_Settings

src/com/android/settings/widget/LabeledSeekBar.java

+82 −124

Original line number	Diff line number	Diff line
		@@ -24,12 +24,10 @@ import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
		import android.support.v4.widget.ExploreByTouchHelper;
		import android.util.AttributeSet;
		import android.view.MotionEvent;
		import android.view.View;
		import android.view.accessibility.AccessibilityEvent;
		import android.widget.RadioButton;
		import android.widget.RadioGroup;
		import android.widget.SeekBar;
		import android.widget.SeekBar.OnSeekBarChangeListener;

		import java.util.List;

		@@ -40,9 +38,90 @@ import java.util.List;
		*/
		public class LabeledSeekBar extends SeekBar {

		private final ExploreByTouchHelper mAccessHelper;

		/** Seek bar change listener set via public method. */
		private OnSeekBarChangeListener mOnSeekBarChangeListener;

		/** Labels for discrete progress values. */
		private String[] mLabels;

		public LabeledSeekBar(Context context, AttributeSet attrs) {
		this(context, attrs, com.android.internal.R.attr.seekBarStyle);
		}

		public LabeledSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
		this(context, attrs, defStyleAttr, 0);
		}

		public LabeledSeekBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
		super(context, attrs, defStyleAttr, defStyleRes);

		mAccessHelper = new LabeledSeekBarExploreByTouchHelper(this);
		ViewCompat.setAccessibilityDelegate(this, mAccessHelper);

		super.setOnSeekBarChangeListener(mProxySeekBarListener);
		}

		@Override
		public synchronized void setProgress(int progress) {
		// This method gets called from the constructor, so mAccessHelper may
		// not have been assigned yet.
		if (mAccessHelper != null) {
		mAccessHelper.invalidateRoot();
		}

		super.setProgress(progress);
		}

		public void setLabels(String[] labels) {
		mLabels = labels;
		}

		@Override
		public void setOnSeekBarChangeListener(OnSeekBarChangeListener l) {
		// The callback set in the constructor will proxy calls to this
		// listener.
		mOnSeekBarChangeListener = l;
		}

		@Override
		protected boolean dispatchHoverEvent(MotionEvent event) {
		return mAccessHelper.dispatchHoverEvent(event) \|\| super.dispatchHoverEvent(event);
		}

		private void sendClickEventForAccessibility(int progress) {
		mAccessHelper.invalidateRoot();
		mAccessHelper.sendEventForVirtualView(progress, AccessibilityEvent.TYPE_VIEW_CLICKED);
		}

		private final OnSeekBarChangeListener mProxySeekBarListener = new OnSeekBarChangeListener() {
		@Override
		public void onStopTrackingTouch(SeekBar seekBar) {
		if (mOnSeekBarChangeListener != null) {
		mOnSeekBarChangeListener.onStopTrackingTouch(seekBar);
		}
		}

		@Override
		public void onStartTrackingTouch(SeekBar seekBar) {
		if (mOnSeekBarChangeListener != null) {
		mOnSeekBarChangeListener.onStartTrackingTouch(seekBar);
		}
		}

		@Override
		public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
		if (mOnSeekBarChangeListener != null) {
		mOnSeekBarChangeListener.onProgressChanged(seekBar, progress, fromUser);
		sendClickEventForAccessibility(progress);
		}
		}
		};

		private class LabeledSeekBarExploreByTouchHelper extends ExploreByTouchHelper {

		public LabeledSeekBarExploreByTouchHelper(View forView) {
		public LabeledSeekBarExploreByTouchHelper(LabeledSeekBar forView) {
		super(forView);
		}

		@@ -134,125 +213,4 @@ public class LabeledSeekBar extends SeekBar {
		return r;
		}
		}

		private String[] mLabels;

		private ExploreByTouchHelper mAccessHelper;

		private boolean mOnMeasureCalled;
		private boolean mOnAttachedWindowCalled;

		public LabeledSeekBar(Context context, AttributeSet attrs) {
		this(context, attrs, com.android.internal.R.attr.seekBarStyle);
		}

		public LabeledSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
		this(context, attrs, defStyleAttr, 0);
		}

		public LabeledSeekBar(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
		super(context, attrs, defStyleAttr, defStyleRes);
		super.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
		@Override
		public void onStopTrackingTouch(SeekBar seekBar) {
		// Do nothing
		}

		@Override
		public void onStartTrackingTouch(SeekBar seekBar) {
		// Do nothing
		}

		@Override
		public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
		sendClickEventForAccessibility(progress);
		}
		});
		}

		@Override
		public synchronized void setProgress(int progress) {
		if (mAccessHelper != null) {
		mAccessHelper.invalidateRoot();
		}

		super.setProgress(progress);
		}

		public void setLabels(String[] labels) {
		mLabels = labels;
		}

		@Override
		public void setOnSeekBarChangeListener(final OnSeekBarChangeListener l) {
		// Tweak the listener to send accessibility event on progress changed.
		OnSeekBarChangeListener l2 = new OnSeekBarChangeListener() {
		@Override
		public void onStopTrackingTouch(SeekBar seekBar) {
		l.onStopTrackingTouch(seekBar);
		}

		@Override
		public void onStartTrackingTouch(SeekBar seekBar) {
		l.onStartTrackingTouch(seekBar);
		}

		@Override
		public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
		l.onProgressChanged(seekBar, progress, fromUser);
		sendClickEventForAccessibility(progress);
		}
		};

		super.setOnSeekBarChangeListener(l2);
		}

		@Override
		protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
		mOnMeasureCalled = true;
		tryInitAccessHelper();
		}

		@Override
		protected void onAttachedToWindow() {
		super.onAttachedToWindow();
		mOnAttachedWindowCalled = true;
		tryInitAccessHelper();
		}

		@Override
		protected void onDetachedFromWindow() {
		ViewCompat.setAccessibilityDelegate(this, null);
		mAccessHelper = null;
		super.onDetachedFromWindow();
		}

		@Override
		protected boolean dispatchHoverEvent(MotionEvent event) {
		if (mAccessHelper != null && mAccessHelper.dispatchHoverEvent(event)) {
		return true;
		}

		return super.dispatchHoverEvent(event);
		}

		/**
		* Initialize accessibility delegation only when both onAttachedWindow and onMeasure
		* has been called.
		*/
		private void tryInitAccessHelper() {
		if (mOnAttachedWindowCalled && mOnMeasureCalled) {
		mAccessHelper = new LabeledSeekBarExploreByTouchHelper(this);
		ViewCompat.setAccessibilityDelegate(this, mAccessHelper);
		mOnAttachedWindowCalled = mOnMeasureCalled = false;
		}
		}

		private void sendClickEventForAccessibility(int progress) {
		if (mAccessHelper != null) {
		mAccessHelper.invalidateRoot();
		mAccessHelper.sendEventForVirtualView(progress, AccessibilityEvent.TYPE_VIEW_CLICKED);
		}
		}
		}