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.accessibility;
  
  import android.view.ViewGroup;
  
  import com.android.launcher3.CellLayout;
  import com.android.launcher3.DropTarget.DragObject;
  import com.android.launcher3.Launcher;
  import com.android.launcher3.dragndrop.DragController.DragListener;
  import com.android.launcher3.dragndrop.DragOptions;
  
  /**
   * Utility listener to enable/disable accessibility drag flags for a ViewGroup
   * containing CellLayouts
   */
  public class AccessibleDragListenerAdapter implements DragListener {
  
      private final ViewGroup mViewGroup;
      private final int mDragType;
  
      /**
       * @param parent
       * @param dragType either {@link CellLayout#WORKSPACE_ACCESSIBILITY_DRAG} or
       *                 {@link CellLayout#FOLDER_ACCESSIBILITY_DRAG}
       */
      public AccessibleDragListenerAdapter(ViewGroup parent, int dragType) {
          mViewGroup = parent;
          mDragType = dragType;
      }
  
      @Override
      public void onDragStart(DragObject dragObject, DragOptions options) {
          enableAccessibleDrag(true);
      }
  
      @Override
      public void onDragEnd() {
          enableAccessibleDrag(false);
          Launcher.getLauncher(mViewGroup.getContext()).getDragController().removeDragListener(this);
      }
  
      protected void enableAccessibleDrag(boolean enable) {
          for (int i = 0; i < mViewGroup.getChildCount(); i++) {
              setEnableForLayout((CellLayout) mViewGroup.getChildAt(i), enable);
          }
      }
  
      protected final void setEnableForLayout(CellLayout layout, boolean enable) {
          layout.enableAccessibleDrag(enable, mDragType);
      }
  }
  