Mario Bertschler
c06af333cb
- organizing imports - remove redundant modifiers on LauncherCallback interface - fix typos Change-Id: I61eb985cac7c1379b6b804a67d4f234386d3d1b4
66 lines
2.5 KiB
Java
66 lines
2.5 KiB
Java
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.dragndrop;
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import android.graphics.Point;
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import com.android.launcher3.DropTarget;
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/**
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* Set of options to control the drag and drop behavior.
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*/
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public class DragOptions {
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/** Whether or not an accessible drag operation is in progress. */
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public boolean isAccessibleDrag = false;
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/** Specifies the start location for the system DnD, null when using internal DnD */
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public Point systemDndStartPoint = null;
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/** Determines when a pre-drag should transition to a drag. By default, this is immediate. */
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public PreDragCondition preDragCondition = null;
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/**
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* Specifies a condition that must be met before DragListener#onDragStart() is called.
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* By default, there is no condition and onDragStart() is called immediately following
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* DragController#startDrag().
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*
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* This condition can be overridden, and callbacks are provided for the following cases:
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* - The pre-drag starts, but onDragStart() is deferred (onPreDragStart()).
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* - The pre-drag ends before the condition is met (onPreDragEnd(false)).
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* - The actual drag starts when the condition is met (onPreDragEnd(true)).
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*/
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public interface PreDragCondition {
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public boolean shouldStartDrag(double distanceDragged);
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/**
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* The pre-drag has started, but onDragStart() is
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* deferred until shouldStartDrag() returns true.
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*/
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void onPreDragStart(DropTarget.DragObject dragObject);
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/**
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* The pre-drag has ended. This gets called at the same time as onDragStart()
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* if the condition is met, otherwise at the same time as onDragEnd().
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* @param dragStarted Whether the pre-drag ended because the actual drag started.
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* This will be true if the condition was met, otherwise false.
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*/
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void onPreDragEnd(DropTarget.DragObject dragObject, boolean dragStarted);
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}
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}
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