Keep QS brightness slider icon in sync.

It now reflects auto-on or auto-off as it changes.

Bug:7303599
Change-Id: I1b1bd6a0545950795f83449c3778e91afa9d04a5

packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettings.java

@@ -754,6 +754,7 @@ class QuickSettings {
             mBrightnessDialog.setCanceledOnTouchOutside(true);
 
             mBrightnessController = new BrightnessController(mContext,
+                    (ImageView) mBrightnessDialog.findViewById(R.id.brightness_icon),
                     (ToggleSlider) mBrightnessDialog.findViewById(R.id.brightness_slider));
             mBrightnessController.addStateChangedCallback(mModel);
             mBrightnessDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {

packages/SystemUI/src/com/android/systemui/statusbar/policy/BrightnessController.java

@@ -28,6 +28,7 @@ import android.provider.Settings.SettingNotFoundException;
 import android.util.Slog;
 import android.view.IWindowManager;
 import android.widget.CompoundButton;
+import android.widget.ImageView;
 
 import com.android.systemui.statusbar.policy.BatteryController.BatteryStateChangeCallback;
 
@@ -40,6 +41,7 @@ public class BrightnessController implements ToggleSlider.Listener {
     private final int mMaximumBacklight;
 
     private final Context mContext;
+    private final ImageView mIcon;
     private final ToggleSlider mControl;
     private final boolean mAutomaticAvailable;
     private final IPowerManager mPower;
@@ -52,8 +54,9 @@ public class BrightnessController implements ToggleSlider.Listener {
         public void onBrightnessLevelChanged();
     }
 
-    public BrightnessController(Context context, ToggleSlider control) {
+    public BrightnessController(Context context, ImageView icon, ToggleSlider control) {
         mContext = context;
+        mIcon = icon;
         mControl = control;
         mUserTracker = new CurrentUserTracker(mContext);
 
@@ -84,8 +87,10 @@ public class BrightnessController implements ToggleSlider.Listener {
                 automatic = 0;
             }
             control.setChecked(automatic != 0);
+            updateIcon(automatic != 0);
         } else {
             control.setChecked(false);
+            updateIcon(false /*automatic*/);
             //control.hideToggle();
         }
         
@@ -105,6 +110,7 @@ public class BrightnessController implements ToggleSlider.Listener {
     public void onChanged(ToggleSlider view, boolean tracking, boolean automatic, int value) {
         setMode(automatic ? Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC
                 : Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
+        updateIcon(automatic);
         if (!automatic) {
             final int val = value + mMinimumBacklight;
             setBrightness(val);
@@ -136,4 +142,12 @@ public class BrightnessController implements ToggleSlider.Listener {
         } catch (RemoteException ex) {
         }        
     }
+
+    private void updateIcon(boolean automatic) {
+        if (mIcon != null) {
+            mIcon.setImageResource(automatic ?
+                    com.android.systemui.R.drawable.ic_qs_brightness_auto_on :
+                    com.android.systemui.R.drawable.ic_qs_brightness_auto_off);
+        }
+    }
 }

packages/SystemUI/src/com/android/systemui/statusbar/tablet/SettingsView.java

@@ -78,6 +78,7 @@ public class SettingsView extends LinearLayout implements View.OnClickListener {
                 });
 
         mBrightness = new BrightnessController(context,
+                (ImageView)findViewById(R.id.brightness_icon),
                 (ToggleSlider)findViewById(R.id.brightness));
         mDoNotDisturb = new DoNotDisturbController(context,
                 (CompoundButton)findViewById(R.id.do_not_disturb_checkbox));