src/Tizen.System.Information/RuntimeInfo/RuntimeInfoEventHandler.cs

   1 /*
   2 * Copyright (c) 2016 - 2017 Samsung Electronics Co., Ltd All Rights Reserved
   3 *
   4 * Licensed under the Apache License, Version 2.0 (the License);
   5 * you may not use this file except in compliance with the License.
   6 * You may obtain a copy of the License at
   7 *
   8 * http://www.apache.org/licenses/LICENSE-2.0
   9 *
  10 * Unless required by applicable law or agreed to in writing, software
  11 * distributed under the License is distributed on an AS IS BASIS,
  12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 * See the License for the specific language governing permissions and
  14 * limitations under the License.
  15 */
  16
  17 using System;
  18
  19 namespace Tizen.System
  20 {
  21     internal class RuntimeInfoEventHandler
  22     {
  23         private RuntimeInfoKey Key;
  24         private event EventHandler<RuntimeFeatureStatusChangedEventArgs> Handler;
  25
  26         internal RuntimeInfoEventHandler(RuntimeInfoKey key)
  27         {
  28             Key = key;
  29             Handler = null;
  30         }
  31
  32         internal event EventHandler<RuntimeFeatureStatusChangedEventArgs> EventHandler
  33         {
  34             add
  35             {
  36                 if (Handler == null)
  37                 {
  38                     InformationError ret = Interop.RuntimeInfo.SetRuntimeInfoChangedCallback(TvProductHelper.ConvertKeyIfTvProduct(Key), RuntimeInformationChangedCallback, IntPtr.Zero);
  39                     if (ret != InformationError.None)
  40                     {
  41                         Log.Error(InformationErrorFactory.LogTag, "Interop failed to add event handler");
  42                         InformationErrorFactory.ThrowException(ret);
  43                     }
  44                 }
  45                 Handler += value;
  46             }
  47             remove
  48             {
  49                 Handler -= value;
  50                 if (Handler == null)
  51                 {
  52                     InformationError ret = Interop.RuntimeInfo.UnsetRuntimeInfoChangedCallback(TvProductHelper.ConvertKeyIfTvProduct(Key));
  53                     if (ret != InformationError.None)
  54                     {
  55                         Log.Error(InformationErrorFactory.LogTag, "Interop failed to add event handler");
  56                         InformationErrorFactory.ThrowException(ret);
  57                     }
  58                 }
  59             }
  60         }
  61
  62         private void RuntimeInformationChangedCallback(RuntimeInfoKey key, IntPtr userData)
  63         {
  64             RuntimeFeatureStatusChangedEventArgs eventArgs = new RuntimeFeatureStatusChangedEventArgs()
  65             {
  66                 Key = Information.HttpPrefix + Information.RuntimeInfoStringKeyPrefix + (Information.EnumStringMapping.ContainsKey(key) ? Information.EnumStringMapping[key] : "Invalid")
  67             };
  68
  69             Handler?.Invoke(null, eventArgs);
  70         }
  71     }
  72 }