Add settled/unsettled state information to launcher

Bug: 10789736
Bug: 10785435
Change-Id: I876707103d495f4a8e55909af63c75da210fefde

2 files changed, 24 insertions, 0 deletions

diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index f8692c0ad..ca1074b5f 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -2305,6 +2305,23 @@ public class Launcher extends Activity
         }
     }
 
+    /**
+     * Called when the user stops interacting with the launcher.
+     * This implies that the user is now on the homescreen and is not doing housekeeping.
+     */
+    protected void onInteractionEnd() {}
+
+    /**
+     * Called when the user starts interacting with the launcher.
+     * The possible interactions are:
+     *  - open all apps
+     *  - reorder an app shortcut, or a widget
+     *  - open the overview mode.
+     * This is a good time to stop doing things that only make sense
+     * when the user is on the homescreen and not doing housekeeping.
+     */
+    protected void onInteractionBegin() {}
+
     void startApplicationDetailsActivity(ComponentName componentName) {
         String packageName = componentName.getPackageName();
         Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
@@ -3071,6 +3088,7 @@ public class Launcher extends Activity
                 .sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
 
         onWorkspaceShown(animated);
+        onInteractionEnd();
     }
 
     public void onWorkspaceShown(boolean animated) {
@@ -3085,6 +3103,7 @@ public class Launcher extends Activity
 
         // Change the state *after* we've called all the transition code
         mState = State.APPS_CUSTOMIZE;
+        onInteractionBegin();
 
         // Pause the auto-advance of widgets until we are out of AllApps
         mUserPresent = false;
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index e7ea221be..2758b8743 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -361,6 +361,7 @@ public class Workspace extends SmoothPagedView
         mIsDragOccuring = true;
         updateChildrenLayersEnabled(false);
         mLauncher.lockScreenOrientation();
+        mLauncher.onInteractionBegin();
         setChildrenBackgroundAlphaMultipliers(1f);
         // Prevent any Un/InstallShortcutReceivers from updating the db while we are dragging
         InstallShortcutReceiver.enableInstallQueue();
@@ -386,6 +387,7 @@ public class Workspace extends SmoothPagedView
 
         removeExtraEmptyScreen();
         mDragSourceInternal = null;
+        mLauncher.onInteractionEnd();
     }
 
     /**
@@ -1737,15 +1739,18 @@ public class Workspace extends SmoothPagedView
     }
 
     public void enterOverviewMode() {
+        mLauncher.onInteractionBegin();
         enableOverviewMode(true, -1, true);
     }
 
     public void exitOverviewMode(boolean animated) {
         exitOverviewMode(-1, animated);
+        mLauncher.onInteractionEnd();
     }
 
     public void exitOverviewMode(int snapPage, boolean animated) {
         enableOverviewMode(false, snapPage, animated);
+        mLauncher.onInteractionEnd();
     }
 
     private void enableOverviewMode(boolean enable, int snapPage, boolean animated) {