Make AbsSeekBar widget adjustable via accessibility actions. (c826b7d8) · Commits · e / os / android_frameworks_base

core/java/android/widget/AbsSeekBar.java

+42 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@ import android.content.res.TypedArray;
		import android.graphics.Canvas;
		import android.graphics.Rect;
		import android.graphics.drawable.Drawable;
		import android.os.Bundle;
		import android.util.AttributeSet;
		import android.view.KeyEvent;
		import android.view.MotionEvent;
		@@ -486,5 +487,46 @@ public abstract class AbsSeekBar extends ProgressBar {
		public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
		super.onInitializeAccessibilityNodeInfo(info);
		info.setClassName(AbsSeekBar.class.getName());

		if (isEnabled()) {
		final int progress = getProgress();
		if (progress > 0) {
		info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD);
		}
		if (progress < getMax()) {
		info.addAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
		}
		}
		}

		@Override
		public boolean performAccessibilityAction(int action, Bundle arguments) {
		if (super.performAccessibilityAction(action, arguments)) {
		return true;
		}
		if (!isEnabled()) {
		return false;
		}
		final int progress = getProgress();
		final int increment = Math.max(1, Math.round((float) getMax() / 5));
		switch (action) {
		case AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD: {
		if (progress <= 0) {
		return false;
		}
		setProgress(progress - increment, true);
		onKeyChange();
		return true;
		}
		case AccessibilityNodeInfo.ACTION_SCROLL_FORWARD: {
		if (progress >= getMax()) {
		return false;
		}
		setProgress(progress + increment, true);
		onKeyChange();
		return true;
		}
		}
		return false;
		}
		}