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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* 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.
*/
using System;
using System.Collections.Generic;
namespace ElmSharp
{
/// <summary>
/// EcoreAnimator is a helper class, it provides functions to manager animations.
/// </summary>
public static class EcoreAnimator
{
static readonly Dictionary<int, Func<bool>> _taskMap = new Dictionary<int, Func<bool>>();
static readonly Object _taskLock = new Object();
static int _newTaskId = 0;
static Interop.Ecore.EcoreTaskCallback _nativeHandler;
static EcoreAnimator()
{
_nativeHandler = NativeHandler;
}
/// <summary>
/// Gets current system time as a floating point value in seconds.
/// </summary>
/// <returns>Current system time</returns>
public static double GetCurrentTime()
{
return Interop.Ecore.ecore_time_get();
}
/// <summary>
/// Adds an animator to call <paramref name="handler"/> at every animation tick during main loop execution.
/// </summary>
/// <param name="handler">The function to call when it ticks off</param>
/// <returns>A handle to the new animator</returns>
public static IntPtr AddAnimator(Func<bool> handler)
{
int id = RegistHandler(handler);
return Interop.Ecore.ecore_animator_add(_nativeHandler, (IntPtr)id);
}
/// <summary>
/// Removes the specified animator from the animator list.
/// </summary>
/// <param name="anim">The specified animator handle</param>
public static void RemoveAnimator(IntPtr anim)
{
int taskId = (int)Interop.Ecore.ecore_animator_del(anim);
_taskMap.Remove(taskId);
}
static int RegistHandler(Func<bool> task)
{
int taskId;
lock (_taskLock)
{
taskId = _newTaskId++;
}
_taskMap[taskId] = task;
return taskId;
}
static bool NativeHandler(IntPtr userData)
{
int task_id = (int)userData;
Func<bool> userAction = null;
_taskMap.TryGetValue(task_id, out userAction);
return (userAction != null) ? userAction() : false;
}
}
}
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