src/Tizen.NUI/src/public/BaseComponents/TextEditorEvent.cs

   1 /*
   2  * Copyright(c) 2019 Samsung Electronics Co., Ltd.
   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
  18 using System;
  19 using System.Runtime.InteropServices;
  20
  21 namespace Tizen.NUI.BaseComponents
  22 {
  23     /// <summary>
  24     /// A control which provides a multi-line editable text editor.
  25     /// </summary>
  26     /// <since_tizen> 3 </since_tizen>
  27     public partial class TextEditor
  28     {
  29         private EventHandler<TextChangedEventArgs> _textEditorTextChangedEventHandler;
  30         private TextChangedCallbackDelegate _textEditorTextChangedCallbackDelegate;
  31
  32         private EventHandler<ScrollStateChangedEventArgs> _textEditorScrollStateChangedEventHandler;
  33         private ScrollStateChangedCallbackDelegate _textEditorScrollStateChangedCallbackDelegate;
  34
  35         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  36         private delegate void TextChangedCallbackDelegate(IntPtr textEditor);
  37
  38         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  39         private delegate void ScrollStateChangedCallbackDelegate(IntPtr textEditor, ScrollState state);
  40
  41         /// <summary>
  42         /// An event for the TextChanged signal which can be used to subscribe or unsubscribe the event handler
  43         /// provided by the user. The TextChanged signal is emitted when the text changes.<br />
  44         /// </summary>
  45         /// <since_tizen> 3 </since_tizen>
  46         public event EventHandler<TextChangedEventArgs> TextChanged
  47         {
  48             add
  49             {
  50                 if (_textEditorTextChangedEventHandler == null)
  51                 {
  52                     _textEditorTextChangedCallbackDelegate = (OnTextChanged);
  53                     TextChangedSignal().Connect(_textEditorTextChangedCallbackDelegate);
  54                 }
  55                 _textEditorTextChangedEventHandler += value;
  56             }
  57             remove
  58             {
  59                 _textEditorTextChangedEventHandler -= value;
  60                 if (_textEditorTextChangedEventHandler == null && TextChangedSignal().Empty() == false)
  61                 {
  62                     TextChangedSignal().Disconnect(_textEditorTextChangedCallbackDelegate);
  63                 }
  64             }
  65         }
  66
  67         /// <summary>
  68         /// Event for the ScrollStateChanged signal which can be used to subscribe or unsubscribe the event handler
  69         /// provided by the user. The ScrollStateChanged signal is emitted when the scroll state changes.<br />
  70         /// </summary>
  71         /// <since_tizen> 3 </since_tizen>
  72         public event EventHandler<ScrollStateChangedEventArgs> ScrollStateChanged
  73         {
  74             add
  75             {
  76                 if (_textEditorScrollStateChangedEventHandler == null)
  77                 {
  78                     _textEditorScrollStateChangedCallbackDelegate = OnScrollStateChanged;
  79                     ScrollStateChangedSignal(this).Connect(_textEditorScrollStateChangedCallbackDelegate);
  80                 }
  81                 _textEditorScrollStateChangedEventHandler += value;
  82             }
  83             remove
  84             {
  85                 _textEditorScrollStateChangedEventHandler -= value;
  86                 if (_textEditorScrollStateChangedEventHandler == null && ScrollStateChangedSignal(this).Empty() == false)
  87                 {
  88                     ScrollStateChangedSignal(this).Disconnect(_textEditorScrollStateChangedCallbackDelegate);
  89                 }
  90             }
  91         }
  92
  93         internal TextEditorSignal TextChangedSignal()
  94         {
  95             TextEditorSignal ret = new TextEditorSignal(Interop.TextEditor.TextEditor_TextChangedSignal(swigCPtr), false);
  96             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  97             return ret;
  98         }
  99
 100         internal ScrollStateChangedSignal ScrollStateChangedSignal(TextEditor textEditor)
 101         {
 102             ScrollStateChangedSignal ret = new ScrollStateChangedSignal(Interop.TextEditor.TextEditor_ScrollStateChangedSignal(TextEditor.getCPtr(textEditor)), false);
 103             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 104             return ret;
 105         }
 106
 107         private void OnTextChanged(IntPtr textEditor)
 108         {
 109             TextChangedEventArgs e = new TextChangedEventArgs();
 110
 111             // Populate all members of "e" (TextChangedEventArgs) with real data
 112             e.TextEditor = Registry.GetManagedBaseHandleFromNativePtr(textEditor) as TextEditor;
 113
 114             if (_textEditorTextChangedEventHandler != null)
 115             {
 116                 //here we send all data to user event handlers
 117                 _textEditorTextChangedEventHandler(this, e);
 118             }
 119         }
 120
 121         private void OnScrollStateChanged(IntPtr textEditor, ScrollState state)
 122         {
 123             ScrollStateChangedEventArgs e = new ScrollStateChangedEventArgs();
 124
 125             if (textEditor != global::System.IntPtr.Zero)
 126             {
 127                 // Populate all members of "e" (ScrollStateChangedEventArgs) with real data
 128                 e.TextEditor = Registry.GetManagedBaseHandleFromNativePtr(textEditor) as TextEditor;
 129                 e.ScrollState = state;
 130             }
 131
 132             if (_textEditorScrollStateChangedEventHandler != null)
 133             {
 134                 //here we send all data to user event handlers
 135                 _textEditorScrollStateChangedEventHandler(this, e);
 136             }
 137         }
 138
 139         /// <summary>
 140         /// Event arguments that passed via the TextChanged signal.
 141         /// </summary>
 142         /// <since_tizen> 3 </since_tizen>
 143         public class TextChangedEventArgs : EventArgs
 144         {
 145             private TextEditor _textEditor;
 146
 147             /// <summary>
 148             /// TextEditor - is the texteditor control which has the text contents changed.
 149             /// </summary>
 150             /// <since_tizen> 3 </since_tizen>
 151             public TextEditor TextEditor
 152             {
 153                 get
 154                 {
 155                     return _textEditor;
 156                 }
 157                 set
 158                 {
 159                     _textEditor = value;
 160                 }
 161             }
 162         }
 163
 164         /// <summary>
 165         /// Event arguments that passed via the ScrollStateChanged signal.
 166         /// </summary>
 167         /// <since_tizen> 3 </since_tizen>
 168         public class ScrollStateChangedEventArgs : EventArgs
 169         {
 170             private TextEditor _textEditor;
 171             private ScrollState _scrollState;
 172
 173             /// <summary>
 174             /// TextEditor - is the texteditor control which has the scroll state changed.
 175             /// </summary>
 176             /// <since_tizen> 3 </since_tizen>
 177             public TextEditor TextEditor
 178             {
 179                 get
 180                 {
 181                     return _textEditor;
 182                 }
 183                 set
 184                 {
 185                     _textEditor = value;
 186                 }
 187             }
 188
 189             /// <summary>
 190             /// ScrollState - is the texteditor control scroll state.
 191             /// </summary>
 192             /// <since_tizen> 3 </since_tizen>
 193             public ScrollState ScrollState
 194             {
 195                 get
 196                 {
 197                     return _scrollState;
 198                 }
 199                 set
 200                 {
 201                     _scrollState = value;
 202                 }
 203             }
 204         }
 205     }
 206 }