1 files changed, 45 insertions, 0 deletions
diff --git a/androidx/widget/recyclerview/selection/OnDragInitiatedListener.java b/androidx/widget/recyclerview/selection/OnDragInitiatedListener.java
new file mode 100644
index 00000000..893832f2
--- /dev/null
+++ b/androidx/widget/recyclerview/selection/OnDragInitiatedListener.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.widget.recyclerview.selection;
+
+import android.support.annotation.NonNull;
+import android.view.MotionEvent;
+
+/**
+ * Register an OnDragInitiatedListener to be notified of potential drag operations,
+ * and to handle them.
+ */
+public interface OnDragInitiatedListener {
+
+    /**
+     * Called when a drag is initiated. Touch input handler only considers
+     * a drag to be initiated on long press on an existing selection,
+     * as normal touch and drag events are strongly associated with scrolling of the view.
+     *
+     * <p>
+     * Drag will only be initiated when the item under the event is already selected.
+     *
+     * <p>
+     * The RecyclerView item at the coordinates of the MotionEvent is not supplied as a parameter
+     * to this method as there may be multiple items selected. Clients can obtain the current
+     * list of selected items from {@link SelectionTracker#copySelection(Selection)}.
+     *
+     * @param e the event associated with the drag.
+     * @return true if the event was handled.
+     */
+    boolean onDragInitiated(@NonNull MotionEvent e);
+}