content: /*
   * Copyright (C) 2016 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 com.android.launcher3.dragndrop;
  
  import android.graphics.Point;
  
  import com.android.launcher3.DropTarget;
  
  /**
   * Set of options to control the drag and drop behavior.
   */
  public class DragOptions {
  
      /** Whether or not an accessible drag operation is in progress. */
      public boolean isAccessibleDrag = false;
  
      /** Specifies the start location for the system DnD, null when using internal DnD */
      public Point systemDndStartPoint = null;
  
      /** Determines when a pre-drag should transition to a drag. By default, this is immediate. */
      public PreDragCondition preDragCondition = null;
  
      /**
       * Specifies a condition that must be met before DragListener#onDragStart() is called.
       * By default, there is no condition and onDragStart() is called immediately following
       * DragController#startDrag().
       *
       * This condition can be overridden, and callbacks are provided for the following cases:
       * - The pre-drag starts, but onDragStart() is deferred (onPreDragStart()).
       * - The pre-drag ends before the condition is met (onPreDragEnd(false)).
       * - The actual drag starts when the condition is met (onPreDragEnd(true)).
       */
      public interface PreDragCondition {
  
          public boolean shouldStartDrag(double distanceDragged);
  
          /**
           * The pre-drag has started, but onDragStart() is
           * deferred until shouldStartDrag() returns true.
           */
          void onPreDragStart(DropTarget.DragObject dragObject);
  
          /**
           * The pre-drag has ended. This gets called at the same time as onDragStart()
           * if the condition is met, otherwise at the same time as onDragEnd().
           * @param dragStarted Whether the pre-drag ended because the actual drag started.
           *                    This will be true if the condition was met, otherwise false.
           */
          void onPreDragEnd(DropTarget.DragObject dragObject, boolean dragStarted);
      }
  }
  