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

   1 /*
   2  * Copyright(c) 2021 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 single line editable text field.
  25     /// </summary>
  26     /// <since_tizen> 3 </since_tizen>
  27     public partial class TextField
  28     {
  29         private EventHandler<TextChangedEventArgs> textFieldTextChangedEventHandler;
  30         private TextChangedCallbackDelegate textFieldTextChangedCallbackDelegate;
  31         private EventHandler<MaxLengthReachedEventArgs> textFieldMaxLengthReachedEventHandler;
  32         private MaxLengthReachedCallbackDelegate textFieldMaxLengthReachedCallbackDelegate;
  33
  34         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  35         private delegate void TextChangedCallbackDelegate(IntPtr textField);
  36
  37         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  38         private delegate void MaxLengthReachedCallbackDelegate(IntPtr textField);
  39
  40         /// <summary>
  41         /// The TextChanged event.
  42         /// </summary>
  43         /// <since_tizen> 3 </since_tizen>
  44         public event EventHandler<TextChangedEventArgs> TextChanged
  45         {
  46             add
  47             {
  48                 if (textFieldTextChangedEventHandler == null)
  49                 {
  50                     textFieldTextChangedCallbackDelegate = (OnTextChanged);
  51                     TextChangedSignal().Connect(textFieldTextChangedCallbackDelegate);
  52                 }
  53                 textFieldTextChangedEventHandler += value;
  54             }
  55             remove
  56             {
  57                 textFieldTextChangedEventHandler -= value;
  58                 if (textFieldTextChangedEventHandler == null && TextChangedSignal().Empty() == false)
  59                 {
  60                     TextChangedSignal().Disconnect(textFieldTextChangedCallbackDelegate);
  61                 }
  62             }
  63         }
  64
  65         /// <summary>
  66         /// The MaxLengthReached event.
  67         /// </summary>
  68         /// <since_tizen> 3 </since_tizen>
  69         public event EventHandler<MaxLengthReachedEventArgs> MaxLengthReached
  70         {
  71             add
  72             {
  73                 if (textFieldMaxLengthReachedEventHandler == null)
  74                 {
  75                     textFieldMaxLengthReachedCallbackDelegate = (OnMaxLengthReached);
  76                     MaxLengthReachedSignal().Connect(textFieldMaxLengthReachedCallbackDelegate);
  77                 }
  78                 textFieldMaxLengthReachedEventHandler += value;
  79             }
  80             remove
  81             {
  82                 if (textFieldMaxLengthReachedEventHandler == null && MaxLengthReachedSignal().Empty() == false)
  83                 {
  84                     this.MaxLengthReachedSignal().Disconnect(textFieldMaxLengthReachedCallbackDelegate);
  85                 }
  86                 textFieldMaxLengthReachedEventHandler -= value;
  87             }
  88         }
  89
  90         internal TextFieldSignal TextChangedSignal()
  91         {
  92             TextFieldSignal ret = new TextFieldSignal(Interop.TextField.TextChangedSignal(SwigCPtr), false);
  93             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  94             return ret;
  95         }
  96
  97         internal TextFieldSignal MaxLengthReachedSignal()
  98         {
  99             TextFieldSignal ret = new TextFieldSignal(Interop.TextField.MaxLengthReachedSignal(SwigCPtr), false);
 100             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 101             return ret;
 102         }
 103
 104         private void OnTextChanged(IntPtr textField)
 105         {
 106             if (textFieldTextChangedEventHandler != null)
 107             {
 108                 TextChangedEventArgs e = new TextChangedEventArgs();
 109
 110                 // Populate all members of "e" (TextChangedEventArgs) with real data
 111                 e.TextField = Registry.GetManagedBaseHandleFromNativePtr(textField) as TextField;
 112                 //here we send all data to user event handlers
 113                 textFieldTextChangedEventHandler(this, e);
 114             }
 115         }
 116
 117         private void OnMaxLengthReached(IntPtr textField)
 118         {
 119             if (textFieldMaxLengthReachedEventHandler != null)
 120             {
 121                 MaxLengthReachedEventArgs e = new MaxLengthReachedEventArgs();
 122
 123                 // Populate all members of "e" (MaxLengthReachedEventArgs) with real data
 124                 e.TextField = Registry.GetManagedBaseHandleFromNativePtr(textField) as TextField;
 125                 //here we send all data to user event handlers
 126                 textFieldMaxLengthReachedEventHandler(this, e);
 127             }
 128         }
 129
 130         /// <summary>
 131         /// The TextChanged event arguments.
 132         /// </summary>
 133         /// <since_tizen> 3 </since_tizen>
 134         public class TextChangedEventArgs : EventArgs
 135         {
 136             private TextField textField;
 137
 138             /// <summary>
 139             /// TextField.
 140             /// </summary>
 141             /// <since_tizen> 3 </since_tizen>
 142             public TextField TextField
 143             {
 144                 get
 145                 {
 146                     return textField;
 147                 }
 148                 set
 149                 {
 150                     textField = value;
 151                 }
 152             }
 153         }
 154
 155         /// <summary>
 156         /// The MaxLengthReached event arguments.
 157         /// </summary>
 158         /// <since_tizen> 3 </since_tizen>
 159         public class MaxLengthReachedEventArgs : EventArgs
 160         {
 161             private TextField textField;
 162
 163             /// <summary>
 164             /// TextField.
 165             /// </summary>
 166             /// <since_tizen> 3 </since_tizen>
 167             public TextField TextField
 168             {
 169                 get
 170                 {
 171                     return textField;
 172                 }
 173                 set
 174                 {
 175                     textField = value;
 176                 }
 177             }
 178         }
 179     }
 180 }