| /* |
| * 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; |
| |
| /** |
| * 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 deferred drag should start. By default, drags aren't deferred at all. */ |
| public DeferDragCondition deferDragCondition = new DeferDragCondition(); |
| |
| /** |
| * 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 drag starts, but onDragStart() is deferred (onDeferredDragStart()). |
| * - The drag ends before the condition is met (onDropBeforeDeferredDrag()). |
| * - The condition is met (onDragStart()). |
| */ |
| public static class DeferDragCondition { |
| public boolean shouldStartDeferredDrag(double distanceDragged) { |
| return true; |
| } |
| |
| /** |
| * The drag has started, but onDragStart() is deferred. |
| * This happens when shouldStartDeferredDrag() returns true. |
| */ |
| public void onDeferredDragStart() { |
| // Do nothing. |
| } |
| |
| /** |
| * User dropped before the deferred condition was met, |
| * i.e. before shouldStartDeferredDrag() returned true. |
| */ |
| public void onDropBeforeDeferredDrag() { |
| // Do nothing |
| } |
| |
| /** onDragStart() has been called, now we are in a normal drag. */ |
| public void onDragStart() { |
| // Do nothing |
| } |
| } |
| } |