Merge changes I7b9e6e7f,I9729cd40 into sc-dev am: 51b35256d2 am: ae054d8584

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14800258

Change-Id: I775c0edcfe403c854a7c87104fa9aba78761f18d

src/com/android/launcher3/Launcher.java

@@ -575,6 +575,14 @@ public class Launcher extends StatefulActivity<LauncherState> implements Launche
         mHotseat.getQsb().setAlpha(1f - visibility);
     }
 
+    /**
+     * Called when one handed mode activated and deactivated.
+     * @param activated true if one handed mode activated, false otherwise.
+     */
+    public void onOneHandedStateChanged(boolean activated) {
+        mDragLayer.onOneHandedModeStateChanged(activated);
+    }
+
     private void initDeviceProfile(InvariantDeviceProfile idp) {
         // Load configuration-specific DeviceProfile
         mDeviceProfile = idp.getDeviceProfile(this);

src/com/android/launcher3/dragndrop/DragLayer.java

@@ -48,6 +48,7 @@ import com.android.launcher3.folder.Folder;
 import com.android.launcher3.graphics.Scrim;
 import com.android.launcher3.keyboard.ViewGroupFocusHelper;
 import com.android.launcher3.util.Thunk;
+import com.android.launcher3.util.TouchController;
 import com.android.launcher3.views.BaseDragLayer;
 
 import java.util.ArrayList;
@@ -519,4 +520,14 @@ public class DragLayer extends BaseDragLayer<Launcher> {
     public Scrim getWorkspaceDragScrim() {
         return mWorkspaceDragScrim;
     }
+
+    /**
+     * Called when one handed mode state changed.
+     * @param activated true if one handed mode activated, false otherwise.
+     */
+    public void onOneHandedModeStateChanged(boolean activated) {
+        for (TouchController controller : mControllers) {
+            controller.onOneHandedModeStateChanged(activated);
+        }
+    }
 }

src/com/android/launcher3/touch/SingleAxisSwipeDetector.java

@@ -102,6 +102,8 @@ public class SingleAxisSwipeDetector extends BaseSwipeDetector {
 
     private int mScrollDirections;
 
+    private float mTouchSlopMultiplier = 1f;
+
     public SingleAxisSwipeDetector(@NonNull Context context, @NonNull Listener l,
             @NonNull Direction dir) {
         this(ViewConfiguration.get(context), l, dir, Utilities.isRtl(context.getResources()));
@@ -115,6 +117,19 @@ public class SingleAxisSwipeDetector extends BaseSwipeDetector {
         mDir = dir;
     }
 
+    /**
+     * Provides feasibility to adjust touch slop when visible window size changed. When visible
+     * bounds translate become smaller, multiply a larger multiplier could ensure the UX
+     * more consistent.
+     *
+     * @see #shouldScrollStart(PointF)
+     *
+     * @param touchSlopMultiplier the value to multiply original touch slop.
+     */
+    public void setTouchSlopMultiplier(float touchSlopMultiplier) {
+        mTouchSlopMultiplier = touchSlopMultiplier;
+    }
+
     public void setDetectableScrollConditions(int scrollDirectionFlags, boolean ignoreSlop) {
         mScrollDirections = scrollDirectionFlags;
         mIgnoreSlopWhenSettling = ignoreSlop;
@@ -133,7 +148,7 @@ public class SingleAxisSwipeDetector extends BaseSwipeDetector {
     @Override
     protected boolean shouldScrollStart(PointF displacement) {
         // Reject cases where the angle or slop condition is not met.
-        float minDisplacement = Math.max(mTouchSlop,
+        float minDisplacement = Math.max(mTouchSlop * mTouchSlopMultiplier,
                 Math.abs(mDir.extractOrthogonalDirection(displacement)));
         if (Math.abs(mDir.extractDirection(displacement)) < minDisplacement) {
             return false;

src/com/android/launcher3/util/TouchController.java

@@ -32,5 +32,10 @@ public interface TouchController {
      */
     boolean onControllerInterceptTouchEvent(MotionEvent ev);
 
+    /**
+     * Called when one handed mode state changed
+     */
+    default void onOneHandedModeStateChanged(boolean activated) { }
+
     default void dump(String prefix, PrintWriter writer) { }
 }