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 using System.ComponentModel;
  19
  20 namespace Tizen.System
  21 {
  22     [EditorBrowsable(EditorBrowsableState.Never)]
  23     internal class RuntimeInfoEventHandler
  24     {
  25         private RuntimeInfoKey Key;
  26         private event EventHandler<RuntimeFeatureStatusChangedEventArgs> Handler;
  27
  28         internal RuntimeInfoEventHandler(RuntimeInfoKey key)
  29         {
  30             Key = key;
  31             Handler = null;
  32         }
  33
  34         internal event EventHandler<RuntimeFeatureStatusChangedEventArgs> EventHandler
  35         {
  36             add
  37             {
  38                 if (Handler == null)
  39                 {
  40                     InformationError ret = Interop.RuntimeInfo.SetRuntimeInfoChangedCallback(TvProductHelper.ConvertKeyIfTvProduct(Key), RuntimeInformationChangedCallback, IntPtr.Zero);
  41                     if (ret != InformationError.None)
  42                     {
  43                         Log.Error(InformationErrorFactory.LogTag, "Interop failed to add event handler");
  44                         InformationErrorFactory.ThrowException(ret);
  45                     }
  46                 }
  47                 Handler += value;
  48             }
  49             remove
  50             {
  51                 Handler -= value;
  52                 if (Handler == null)
  53                 {
  54                     InformationError ret = Interop.RuntimeInfo.UnsetRuntimeInfoChangedCallback(TvProductHelper.ConvertKeyIfTvProduct(Key));
  55                     if (ret != InformationError.None)
  56                     {
  57                         Log.Error(InformationErrorFactory.LogTag, "Interop failed to add event handler");
  58                         InformationErrorFactory.ThrowException(ret);
  59                     }
  60                 }
  61             }
  62         }
  63
  64         private void RuntimeInformationChangedCallback(RuntimeInfoKey key, IntPtr userData)
  65         {
  66             RuntimeFeatureStatusChangedEventArgs eventArgs = new RuntimeFeatureStatusChangedEventArgs()
  67             {
  68                 Key = Information.HttpPrefix + Information.RuntimeInfoStringKeyPrefix + (Information.EnumStringMapping.ContainsKey(key) ? Information.EnumStringMapping[key] : "Invalid")
  69             };
  70
  71             Handler?.Invoke(null, eventArgs);
  72         }
  73     }
  74 }