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Commit c826b7d8 authored by alanv's avatar alanv
Browse files

Make AbsSeekBar widget adjustable via accessibility actions.

Change-Id: I559da3cea139c2d5a4c82e2854921de173fbfa4f
parent 0763e01c
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+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;
    }
}