| /* |
| * Copyright (C) 2015 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 android.support.v13.view; |
| |
| import android.content.ClipData; |
| import android.support.v4.os.BuildCompat; |
| import android.view.View; |
| |
| /** |
| * Helper for accessing features in {@link View} introduced after API |
| * level 13 in a backwards compatible fashion. |
| */ |
| public class ViewCompat extends android.support.v4.view.ViewCompat { |
| interface ViewCompatImpl { |
| boolean startDragAndDrop(View v, ClipData data, View.DragShadowBuilder shadowBuilder, |
| Object localState, int flags); |
| void cancelDragAndDrop(View v); |
| void updateDragShadow(View v, View.DragShadowBuilder shadowBuilder); |
| } |
| |
| private static class BaseViewCompatImpl implements ViewCompatImpl { |
| @Override |
| public boolean startDragAndDrop(View v, ClipData data, View.DragShadowBuilder shadowBuilder, |
| Object localState, int flags) { |
| return v.startDrag(data, shadowBuilder, localState, flags); |
| } |
| |
| @Override |
| public void cancelDragAndDrop(View v) { |
| // no-op |
| } |
| |
| @Override |
| public void updateDragShadow(View v, View.DragShadowBuilder shadowBuilder) { |
| // no-op |
| } |
| } |
| |
| private static class Api24ViewCompatImpl implements ViewCompatImpl { |
| @Override |
| public boolean startDragAndDrop(View v, ClipData data, View.DragShadowBuilder shadowBuilder, |
| Object localState, int flags) { |
| return ViewCompatApi24.startDragAndDrop( |
| v, data, shadowBuilder, localState, flags); |
| } |
| |
| @Override |
| public void cancelDragAndDrop(View v) { |
| ViewCompatApi24.cancelDragAndDrop(v); |
| } |
| |
| @Override |
| public void updateDragShadow(View v, View.DragShadowBuilder shadowBuilder) { |
| ViewCompatApi24.updateDragShadow(v, shadowBuilder); |
| } |
| } |
| |
| static ViewCompatImpl IMPL; |
| static { |
| if (BuildCompat.isAtLeastN()) { |
| IMPL = new Api24ViewCompatImpl(); |
| } else { |
| IMPL = new BaseViewCompatImpl(); |
| } |
| } |
| |
| /** |
| * Start the drag and drop operation. |
| */ |
| public static boolean startDragAndDrop(View v, ClipData data, |
| View.DragShadowBuilder shadowBuilder, Object localState, int flags) { |
| return IMPL.startDragAndDrop(v, data, shadowBuilder, localState, flags); |
| } |
| |
| /** |
| * Cancel the drag and drop operation. |
| */ |
| public static void cancelDragAndDrop(View v) { |
| IMPL.cancelDragAndDrop(v); |
| } |
| |
| /** |
| * Update the drag shadow while drag and drop is in progress. |
| */ |
| public static void updateDragShadow(View v, View.DragShadowBuilder shadowBuilder) { |
| IMPL.updateDragShadow(v, shadowBuilder); |
| } |
| |
| private ViewCompat() { |
| } |
| } |