Expand the navbar dead zone briefly after touches elsewhere.

For now, each time the dead zone captures a touch, it will
flash to let you know that's what happened. We should
probably turn this off before shipping.

Note also that this currently only expands the navbar on
ACTION_DOWN elsewhere in the UI (because this is the only
time ACTION_OUTSIDE is generated); this isn't perfect and
we'll need to do some mucking about with the input system to
get information about ongoing drags or additional pointers
down, but this CL is a good start and introduces the general
mechanism for expanding and contracting the dead zone.

Change-Id: I43e63aed1e541fd07d83fde4d66bcb5be89b69d2

5 files changed, 43 insertions, 5 deletions

diff --git a/packages/SystemUI/res/layout-sw600dp/navigation_bar.xml b/packages/SystemUI/res/layout-sw600dp/navigation_bar.xml
index 67e13eb..fbbd7e5 100644
--- a/packages/SystemUI/res/layout-sw600dp/navigation_bar.xml
+++ b/packages/SystemUI/res/layout-sw600dp/navigation_bar.xml
@@ -143,8 +143,13 @@
 
         <com.android.systemui.statusbar.policy.DeadZone
             android:id="@+id/deadzone"
-            android:layout_height="@dimen/navigation_bar_deadzone_size"
+            android:layout_height="match_parent"
             android:layout_width="match_parent"
+            systemui:minSize="@dimen/navigation_bar_deadzone_size"
+            systemui:maxSize="@dimen/navigation_bar_deadzone_size_max"
+            systemui:holdTime="@integer/navigation_bar_deadzone_hold"
+            systemui:decayTime="@integer/navigation_bar_deadzone_decay"
+            systemui:orientation="horizontal"
             android:layout_gravity="top"
             />
     </FrameLayout>
@@ -269,8 +274,13 @@
 
         <com.android.systemui.statusbar.policy.DeadZone
             android:id="@+id/deadzone"
-            android:layout_height="@dimen/navigation_bar_deadzone_size"
+            android:layout_height="match_parent"
             android:layout_width="match_parent"
+            systemui:minSize="@dimen/navigation_bar_deadzone_size"
+            systemui:maxSize="@dimen/navigation_bar_deadzone_size_max"
+            systemui:holdTime="@integer/navigation_bar_deadzone_hold"
+            systemui:decayTime="@integer/navigation_bar_deadzone_decay"
+            systemui:orientation="vertical"
             android:layout_gravity="top"
             />
     </FrameLayout>
diff --git a/packages/SystemUI/res/layout/navigation_bar.xml b/packages/SystemUI/res/layout/navigation_bar.xml
index d41040d..33b5dbb 100644
--- a/packages/SystemUI/res/layout/navigation_bar.xml
+++ b/packages/SystemUI/res/layout/navigation_bar.xml
@@ -147,8 +147,13 @@
 
         <com.android.systemui.statusbar.policy.DeadZone
             android:id="@+id/deadzone"
-            android:layout_height="@dimen/navigation_bar_deadzone_size"
+            android:layout_height="match_parent"
             android:layout_width="match_parent"
+            systemui:minSize="@dimen/navigation_bar_deadzone_size"
+            systemui:maxSize="@dimen/navigation_bar_deadzone_size_max"
+            systemui:holdTime="@integer/navigation_bar_deadzone_hold"
+            systemui:decayTime="@integer/navigation_bar_deadzone_decay"
+            systemui:orientation="horizontal"
             android:layout_gravity="top"
             />
     </FrameLayout>
@@ -276,9 +281,14 @@
 
         <com.android.systemui.statusbar.policy.DeadZone
             android:id="@+id/deadzone"
-            android:layout_width="@dimen/navigation_bar_deadzone_size"
             android:layout_height="match_parent"
-            android:layout_gravity="left"
+            android:layout_width="match_parent"
+            systemui:minSize="@dimen/navigation_bar_deadzone_size"
+            systemui:maxSize="@dimen/navigation_bar_deadzone_size_max"
+            systemui:holdTime="@integer/navigation_bar_deadzone_hold"
+            systemui:decayTime="@integer/navigation_bar_deadzone_decay"
+            systemui:orientation="vertical"
+            android:layout_gravity="top"
             />
     </FrameLayout>
 
diff --git a/packages/SystemUI/res/values/attrs.xml b/packages/SystemUI/res/values/attrs.xml
index 48fb21f..047570f 100644
--- a/packages/SystemUI/res/values/attrs.xml
+++ b/packages/SystemUI/res/values/attrs.xml
@@ -35,5 +35,17 @@
     <declare-styleable name="RecentsPanelView">
         <attr name="recentItemLayout" format="reference" />
     </declare-styleable>
+    <declare-styleable name="DeadZone">
+        <attr name="minSize" format="dimension" />
+        <attr name="maxSize" format="dimension" />
+        <attr name="holdTime" format="integer" />
+        <attr name="decayTime" format="integer" />
+        <attr name="orientation" />
+    </declare-styleable>
+
+    <attr name="orientation">
+        <enum name="horizontal" value="0" />
+        <enum name="vertical" value="1" />
+    </attr>
 </resources>
 
diff --git a/packages/SystemUI/res/values/config.xml b/packages/SystemUI/res/values/config.xml
index 1cd7904..3337573 100644
--- a/packages/SystemUI/res/values/config.xml
+++ b/packages/SystemUI/res/values/config.xml
@@ -72,5 +72,9 @@
     <!-- Whether we're using the tablet-optimized recents interface (we use this
      value at runtime for some things) -->
     <integer name="status_bar_recents_bg_gradient_degrees">90</integer>
+
+    <!-- decay duration (from size_max -> size), in ms -->
+    <integer name="navigation_bar_deadzone_hold">333</integer>
+    <integer name="navigation_bar_deadzone_decay">333</integer>
 </resources>
 
diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index 94465e2..0d7cdb1 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -63,6 +63,8 @@
     <!-- thickness (height) of the dead zone at the top of the navigation bar,
          reducing false presses on navbar buttons; approx 2mm -->
     <dimen name="navigation_bar_deadzone_size">12dp</dimen>
+    <!-- size of the dead zone when touches have recently occurred elsewhere on screen -->
+    <dimen name="navigation_bar_deadzone_size_max">32dp</dimen>
 
     <!-- Height of notification icons in the status bar -->
     <dimen name="status_bar_icon_size">@*android:dimen/status_bar_icon_size</dimen>