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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;
using System.Linq;
internal static partial class Interop
{
internal class SmartEvent<TEventArgs> : IDisposable where TEventArgs : EventArgs
{
public delegate TEventArgs SmartEventInfoParser(IntPtr data, IntPtr obj, IntPtr info);
private readonly object _sender;
private readonly string _eventName;
private readonly IntPtr _handle;
private readonly SmartEventInfoParser _parser;
private readonly List<NativeCallback> _nativeCallbacks = new List<NativeCallback>();
public SmartEvent(object sender, IntPtr handle, string eventName, SmartEventInfoParser parser)
{
_sender = sender;
_eventName = eventName;
_handle = handle;
_parser = parser;
}
public SmartEvent(object sender, IntPtr handle, string eventName) : this(sender, handle, eventName, null)
{
}
~SmartEvent()
{
Dispose(false);
}
private struct NativeCallback
{
public Interop.Evas.SmartCallback callback;
public EventHandler<TEventArgs> eventHandler;
}
public event EventHandler<TEventArgs> On
{
add
{
EventHandler<TEventArgs> handler = value;
var cb = new Interop.Evas.SmartCallback((d, o, e) =>
{
TEventArgs ea = _parser == null ? (TEventArgs)EventArgs.Empty : _parser(d, o, e);
handler(_sender, ea);
});
_nativeCallbacks.Add(new NativeCallback { callback = cb, eventHandler = handler });
int i = _nativeCallbacks.Count - 1;
Interop.Evas.evas_object_smart_callback_add(_handle, _eventName, _nativeCallbacks[i].callback, IntPtr.Zero);
}
remove
{
EventHandler<TEventArgs> handler = value;
var callbacks = _nativeCallbacks.Where(cb => cb.eventHandler == handler);
foreach (var cb in callbacks)
{
Interop.Evas.evas_object_smart_callback_del(_handle, _eventName, cb.callback);
}
}
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
// Place holder to dispose managed state (managed objects).
}
foreach (var cb in _nativeCallbacks)
{
Evas.evas_object_smart_callback_del(_handle, _eventName, cb.callback);
}
_nativeCallbacks.Clear();
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
}
internal class SmartEvent : IDisposable
{
private readonly object _sender;
private readonly string _eventName;
private readonly IntPtr _handle;
private readonly List<NativeCallback> _nativeCallbacks = new List<NativeCallback>();
public SmartEvent(object sender, IntPtr handle, string eventName)
{
_sender = sender;
_eventName = eventName;
_handle = handle;
}
~SmartEvent()
{
Dispose(false);
}
private struct NativeCallback
{
public Interop.Evas.SmartCallback callback;
public EventHandler eventHandler;
}
public event EventHandler On
{
add
{
EventHandler handler = value;
var cb = new Interop.Evas.SmartCallback((d, o, e) =>
{
handler(_sender, EventArgs.Empty);
});
_nativeCallbacks.Add(new NativeCallback { callback = cb, eventHandler = handler });
int i = _nativeCallbacks.Count - 1;
Interop.Evas.evas_object_smart_callback_add(_handle, _eventName, _nativeCallbacks[i].callback, IntPtr.Zero);
}
remove
{
EventHandler handler = value;
var callbacks = _nativeCallbacks.Where(cb => cb.eventHandler == handler);
foreach (var cb in callbacks)
{
Interop.Evas.evas_object_smart_callback_del(_handle, _eventName, cb.callback);
}
}
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
// Place holder to dispose managed state (managed objects).
}
foreach (var cb in _nativeCallbacks)
{
Evas.evas_object_smart_callback_del(_handle, _eventName, cb.callback);
}
_nativeCallbacks.Clear();
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
}
}
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