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/*
* 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
}
}
}
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