Reset rollo to page 0 when it's fully zoomed out.

res/raw/rollo.c

@@ -92,6 +92,10 @@ void fling() {
     //g_Zoom += (maxf(fabsf(g_PosVelocity), 3) - 3) / 2.f;
 }
 
+void touchUp() {
+    g_LastTouchDown = 0;
+}
+
 void setZoomTarget() {
     g_ZoomTarget = state->zoomTarget;
     //debugF("zoom target", g_ZoomTarget);
@@ -320,8 +324,10 @@ main(int launchID)
     // Set clear value to dim the background based on the zoom position.
     if (g_Zoom < 0.001f) {
         pfClearColor(0.0f, 0.0f, 0.0f, 0.0f);
-        // Nothing else to do if fully zoomed out.
-        g_PosPage = roundf(g_PosPage);
+        // When we're zoomed out and not tracking motion events, reset the pos to 0.
+        if (!g_LastTouchDown) {
+            g_PosPage = 0;
+        }
         return 1; // 0;
     } else if (g_Zoom < 0.8f) {
         pfClearColor(0.0f, 0.0f, 0.0f, g_Zoom);
@@ -329,8 +335,6 @@ main(int launchID)
         pfClearColor(0.0f, 0.0f, 0.0f, 0.80f);
     }
 
-
-
     // icons & labels
     int iconCount = state->iconCount;
     g_PageCount = count_pages(iconCount);

src/com/android/launcher2/AllAppsView.java

@@ -87,6 +87,7 @@ public class AllAppsView extends RSSurfaceView
     private int mMotionDownRawY;
     private int mScrollHandleTop;
     private long mTouchTime;
+    private boolean mZoomSwipeInProgress;
 
     static class Defines {
         private static float farSize(float sizeAt0) {
@@ -236,16 +237,17 @@ public class AllAppsView extends RSSurfaceView
             break;
         case MotionEvent.ACTION_UP:
         case MotionEvent.ACTION_CANCEL:
+            if (!mZoomSwipeInProgress) {
+                mRollo.mState.newPositionX = ev.getRawX() / Defines.SCREEN_WIDTH_PX;
+                mRollo.mState.newTouchDown = 0;
 
-            mRollo.mState.newPositionX = ev.getRawX() / Defines.SCREEN_WIDTH_PX;
-            mRollo.mState.newTouchDown = 0;
-
-            mVelocity.computeCurrentVelocity(1000 /* px/sec */,
-                    mConfig.getScaledMaximumFlingVelocity());
-            mRollo.mState.flingVelocityX = mVelocity.getXVelocity() / Defines.SCREEN_WIDTH_PX;
-            mRollo.clearSelectedIcon();
-            mRollo.mState.save();
-            mRollo.mInvokeFling.execute();
+                mVelocity.computeCurrentVelocity(1000 /* px/sec */,
+                        mConfig.getScaledMaximumFlingVelocity());
+                mRollo.mState.flingVelocityX = mVelocity.getXVelocity() / Defines.SCREEN_WIDTH_PX;
+                mRollo.clearSelectedIcon();
+                mRollo.mState.save();
+                mRollo.mInvokeFling.execute();
+            }
             mLastMotionX = -10000;
             mVelocity.recycle();
             mVelocity = null;
@@ -297,6 +299,15 @@ public class AllAppsView extends RSSurfaceView
     public void onDropCompleted(View target, boolean success) {
     }
 
+    public void setZoomSwipeInProgress(boolean swiping, boolean touchStillDown) {
+        mZoomSwipeInProgress = swiping;
+        if (!touchStillDown) {
+            mRollo.mState.newTouchDown = 0;
+            mRollo.mState.save();
+            mRollo.mInvokeTouchUp.execute();
+        }
+    }
+
     public void setZoomTarget(float amount) {
         zoom(amount, true);
     }
@@ -403,6 +414,7 @@ public class AllAppsView extends RSSurfaceView
         private Script.Invokable mInvokeFling;
         private Script.Invokable mInvokeSetZoomTarget;
         private Script.Invokable mInvokeSetZoom;
+        private Script.Invokable mInvokeTouchUp;
 
         private Sampler mSampler;
         private Sampler mSamplerText;
@@ -631,6 +643,7 @@ public class AllAppsView extends RSSurfaceView
             mInvokeFling = sb.addInvokable("fling");
             mInvokeSetZoomTarget = sb.addInvokable("setZoomTarget");
             mInvokeSetZoom = sb.addInvokable("setZoom");
+            mInvokeTouchUp = sb.addInvokable("touchUp");
             mScript = sb.create();
             mScript.setClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 

src/com/android/launcher2/SwipeController.java

@@ -125,6 +125,7 @@ public class SwipeController {
             mTracking = false;
             mDownX = screenX;
             mDownY = screenY;
+            mAllAppsView.setZoomSwipeInProgress(true, true);
             break;
 
         case MotionEvent.ACTION_MOVE:
@@ -132,6 +133,7 @@ public class SwipeController {
                 if (Math.abs(deltaX) > mSlop) {
                     mCanceled = true;
                     mTracking = false;
+                    mAllAppsView.setZoomSwipeInProgress(false, true);
                 }
                 if (Math.abs(deltaY) > mSlop) {
                     mTracking = true;
@@ -146,6 +148,7 @@ public class SwipeController {
         case MotionEvent.ACTION_UP:
             if (mTracking && !mCanceled) {
                 fling(screenY);
+                mAllAppsView.setZoomSwipeInProgress(false, false);
             }
             mVelocityTracker.recycle();
             mVelocityTracker = null;