NavBar: Slippery on the unsecured lock screen.

The NavBar is always non-slippery, except when:
 - the notification shade is showing
 - the 3 buttons (back,home,recents) are disabled

Also fix unrelated bug that ignored the "show panel delay"
before the first config change.

Bug: 6614842
Change-Id: Ib40adaef122b563809398fdebbd8a88d8f0c7ffd

Author: John Spurlock

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

@@ -225,11 +225,28 @@ public void setDisabledFlags(int disabledFlags, boolean force) {
         final boolean disableRecent = ((disabledFlags & View.STATUS_BAR_DISABLE_RECENT) != 0);
         final boolean disableBack = ((disabledFlags & View.STATUS_BAR_DISABLE_BACK) != 0);
 
+        setSlippery(disableHome && disableRecent && disableBack);
+
         getBackButton()   .setVisibility(disableBack       ? View.INVISIBLE : View.VISIBLE);
         getHomeButton()   .setVisibility(disableHome       ? View.INVISIBLE : View.VISIBLE);
         getRecentsButton().setVisibility(disableRecent     ? View.INVISIBLE : View.VISIBLE);
     }
 
+    public void setSlippery(boolean newSlippery) {
+        WindowManager.LayoutParams lp = (WindowManager.LayoutParams) getLayoutParams();
+        if (lp != null) {
+            boolean oldSlippery = (lp.flags & WindowManager.LayoutParams.FLAG_SLIPPERY) != 0;
+            if (!oldSlippery && newSlippery) {
+                lp.flags |= WindowManager.LayoutParams.FLAG_SLIPPERY;
+            } else if (oldSlippery && !newSlippery) {
+                lp.flags &= ~WindowManager.LayoutParams.FLAG_SLIPPERY;
+            } else {
+                return;
+            }
+            WindowManagerImpl.getDefault().updateViewLayout(this, lp);
+        }
+    }
+
     public void setMenuVisibility(final boolean show) {
         setMenuVisibility(show, false);
     }

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

@@ -376,6 +376,8 @@ public boolean onTouch(View v, MotionEvent event) {
             mIntruderAlertView.setBar(this);
         }
 
+        updateShowSearchHoldoff();
+
         mStatusBarView.mService = this;
 
         mChoreographer = Choreographer.getInstance();
@@ -663,7 +665,6 @@ private WindowManager.LayoutParams getNavigationBarLayoutParams() {
 
         lp.setTitle("NavigationBar");
         lp.windowAnimations = 0;
-
         return lp;
     }
 
@@ -808,8 +809,12 @@ public void removeNotification(IBinder key) {
     @Override
     protected void onConfigurationChanged(Configuration newConfig) {
         updateRecentsPanel();
-        mShowSearchHoldoff  = mContext.getResources().getInteger(
-                R.integer.config_show_search_delay);
+        updateShowSearchHoldoff();
+    }
+
+    private void updateShowSearchHoldoff() {
+        mShowSearchHoldoff = mContext.getResources().getInteger(
+            R.integer.config_show_search_delay);
     }
 
     private void loadNotificationShade() {
@@ -1174,7 +1179,8 @@ private void makeExpandedVisible(boolean revealAfterDraw) {
 
         mExpandedVisible = true;
         mPile.setLayoutTransitionsEnabled(true);
-        makeSlippery(mNavigationBarView, true);
+        if (mNavigationBarView != null)
+            mNavigationBarView.setSlippery(true);
 
         updateCarrierLabelVisibility(true);
 
@@ -1198,19 +1204,6 @@ private void makeExpandedVisible(boolean revealAfterDraw) {
         visibilityChanged(true);
     }
 
-    private static void makeSlippery(View view, boolean slippery) {
-        if (view == null) {
-            return;
-        }
-        WindowManager.LayoutParams lp = (WindowManager.LayoutParams) view.getLayoutParams();
-        if (slippery) {
-            lp.flags |= WindowManager.LayoutParams.FLAG_SLIPPERY;
-        } else {
-            lp.flags &= ~WindowManager.LayoutParams.FLAG_SLIPPERY;
-        }
-        WindowManagerImpl.getDefault().updateViewLayout(view, lp);
-    }
-
     public void animateExpand() {
         if (SPEW) Slog.d(TAG, "Animate expand: expanded=" + mExpanded);
         if ((mDisabled & StatusBarManager.DISABLE_EXPAND) != 0) {
@@ -1295,8 +1288,9 @@ void performCollapse() {
         }
         mExpandedVisible = false;
         mPile.setLayoutTransitionsEnabled(false);
+        if (mNavigationBarView != null)
+            mNavigationBarView.setSlippery(false);
         visibilityChanged(false);
-        makeSlippery(mNavigationBarView, false);
 
         // Shrink the window to the size of the status bar only
         WindowManager.LayoutParams lp = (WindowManager.LayoutParams) mStatusBarWindow.getLayoutParams();