diff --git a/src/com/android/launcher3/LauncherState.java b/src/com/android/launcher3/LauncherState.java
index 54d8f0d..e2b867e 100644
--- a/src/com/android/launcher3/LauncherState.java
+++ b/src/com/android/launcher3/LauncherState.java
@@ -36,6 +36,7 @@
 import static com.android.launcher3.testing.TestProtocol.BACKGROUND_APP_STATE_ORDINAL;
 import static com.android.launcher3.testing.TestProtocol.HINT_STATE_ORDINAL;
 import static com.android.launcher3.testing.TestProtocol.NORMAL_STATE_ORDINAL;
+import static com.android.launcher3.testing.TestProtocol.OVERVIEW_MODAL_TASK_STATE_ORDINAL;
 import static com.android.launcher3.testing.TestProtocol.OVERVIEW_PEEK_STATE_ORDINAL;
 import static com.android.launcher3.testing.TestProtocol.OVERVIEW_STATE_ORDINAL;
 import static com.android.launcher3.testing.TestProtocol.QUICK_SWITCH_STATE_ORDINAL;
@@ -101,7 +102,7 @@
                 }
             };
 
-    private static final LauncherState[] sAllStates = new LauncherState[8];
+    private static final LauncherState[] sAllStates = new LauncherState[9];
 
     /**
      * TODO: Create a separate class for NORMAL state.
@@ -128,6 +129,8 @@
     public static final LauncherState OVERVIEW = new OverviewState(OVERVIEW_STATE_ORDINAL);
     public static final LauncherState OVERVIEW_PEEK =
             OverviewState.newPeekState(OVERVIEW_PEEK_STATE_ORDINAL);
+    public static final LauncherState OVERVIEW_MODAL_TASK = OverviewState.newModalTaskState(
+            OVERVIEW_MODAL_TASK_STATE_ORDINAL);
     public static final LauncherState QUICK_SWITCH =
             OverviewState.newSwitchState(QUICK_SWITCH_STATE_ORDINAL);
     public static final LauncherState BACKGROUND_APP =
@@ -280,6 +283,14 @@
     }
 
     /**
+     * For this state, how modal should over view been shown. 0 modalness means all tasks drawn,
+     * 1 modalness means the current task is show on its own.
+     */
+    public float getOverviewModalness() {
+        return 0;
+    }
+
+    /**
      * The amount of blur and wallpaper zoom to apply to the background of either the app
      * or Launcher surface in this state. Should be a number between 0 and 1, inclusive.
      *
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 3c3ab6c..d95ccb4 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -340,6 +340,30 @@
     }
 
     /**
+     * Bounds parameter to the range [0, 1]
+     */
+    public static float saturate(float a) {
+        return boundToRange(a, 0, 1.0f);
+    }
+
+    /**
+     * Returns the compliment (1 - a) of the parameter.
+     */
+    public static float comp(float a) {
+        return 1 - a;
+    }
+
+    /**
+     * Returns the "probabilistic or" of a and b. (a + b - ab).
+     * Useful beyond probability, can be used to combine two unit progresses for example.
+     */
+    public static float or(float a, float b) {
+        float satA = saturate(a);
+        float satB = saturate(b);
+        return satA + satB - (satA * satB);
+    }
+
+    /**
      * Trims the string, removing all whitespace at the beginning and end of the string.
      * Non-breaking whitespaces are also removed.
      */
diff --git a/src/com/android/launcher3/states/StateAnimationConfig.java b/src/com/android/launcher3/states/StateAnimationConfig.java
index 8dccbd3..1c49867 100644
--- a/src/com/android/launcher3/states/StateAnimationConfig.java
+++ b/src/com/android/launcher3/states/StateAnimationConfig.java
@@ -69,6 +69,7 @@
             ANIM_ALL_APPS_FADE,
             ANIM_OVERVIEW_SCRIM_FADE,
             ANIM_ALL_APPS_HEADER_FADE,
+            ANIM_OVERVIEW_MODAL
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface AnimType {}
@@ -85,8 +86,9 @@
     public static final int ANIM_ALL_APPS_FADE = 10;
     public static final int ANIM_OVERVIEW_SCRIM_FADE = 11;
     public static final int ANIM_ALL_APPS_HEADER_FADE = 12; // e.g. predictions
+    public static final int ANIM_OVERVIEW_MODAL = 13;
 
-    private static final int ANIM_TYPES_COUNT = 13;
+    private static final int ANIM_TYPES_COUNT = 14;
 
     private final Interpolator[] mInterpolators = new Interpolator[ANIM_TYPES_COUNT];
 
diff --git a/src/com/android/launcher3/testing/TestProtocol.java b/src/com/android/launcher3/testing/TestProtocol.java
index a5a06b4..fba6269 100644
--- a/src/com/android/launcher3/testing/TestProtocol.java
+++ b/src/com/android/launcher3/testing/TestProtocol.java
@@ -28,10 +28,11 @@
     public static final int SPRING_LOADED_STATE_ORDINAL = 1;
     public static final int OVERVIEW_STATE_ORDINAL = 2;
     public static final int OVERVIEW_PEEK_STATE_ORDINAL = 3;
-    public static final int QUICK_SWITCH_STATE_ORDINAL = 4;
-    public static final int ALL_APPS_STATE_ORDINAL = 5;
-    public static final int BACKGROUND_APP_STATE_ORDINAL = 6;
-    public static final int HINT_STATE_ORDINAL = 7;
+    public static final int OVERVIEW_MODAL_TASK_STATE_ORDINAL = 4;
+    public static final int QUICK_SWITCH_STATE_ORDINAL = 5;
+    public static final int ALL_APPS_STATE_ORDINAL = 6;
+    public static final int BACKGROUND_APP_STATE_ORDINAL = 7;
+    public static final int HINT_STATE_ORDINAL = 8;
     public static final String TAPL_EVENTS_TAG = "TaplEvents";
     public static final String SEQUENCE_MAIN = "Main";
     public static final String SEQUENCE_TIS = "TIS";
@@ -47,6 +48,8 @@
                 return "Overview";
             case OVERVIEW_PEEK_STATE_ORDINAL:
                 return "OverviewPeek";
+            case OVERVIEW_MODAL_TASK_STATE_ORDINAL:
+                return "OverviewModalState";
             case QUICK_SWITCH_STATE_ORDINAL:
                 return "QuickSwitch";
             case ALL_APPS_STATE_ORDINAL: