src/Tizen.NUI/src/public/BaseComponents/ViewEvent.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.ComponentModel;
  20 using System.Runtime.InteropServices;
  21
  22 namespace Tizen.NUI.BaseComponents
  23 {
  24     /// <summary>
  25     /// View is the base class for all views.
  26     /// </summary>
  27     /// <since_tizen> 3 </since_tizen>
  28     public partial class View
  29     {
  30         private EventHandler offWindowEventHandler;
  31         private OffWindowEventCallbackType offWindowEventCallback;
  32         private EventHandlerWithReturnType<object, WheelEventArgs, bool> wheelEventHandler;
  33         private WheelEventCallbackType wheelEventCallback;
  34         private EventHandlerWithReturnType<object, KeyEventArgs, bool> keyEventHandler;
  35         private KeyCallbackType keyCallback;
  36         private EventHandlerWithReturnType<object, TouchEventArgs, bool> interceptTouchDataEventHandler;
  37         private TouchDataCallbackType interceptTouchDataCallback;
  38         private EventHandlerWithReturnType<object, TouchEventArgs, bool> touchDataEventHandler;
  39         private TouchDataCallbackType touchDataCallback;
  40         private EventHandlerWithReturnType<object, HoverEventArgs, bool> hoverEventHandler;
  41         private HoverEventCallbackType hoverEventCallback;
  42         private EventHandler<VisibilityChangedEventArgs> visibilityChangedEventHandler;
  43         private VisibilityChangedEventCallbackType visibilityChangedEventCallback;
  44         private EventHandler keyInputFocusGainedEventHandler;
  45         private KeyInputFocusGainedCallbackType keyInputFocusGainedCallback;
  46         private EventHandler keyInputFocusLostEventHandler;
  47         private KeyInputFocusLostCallbackType keyInputFocusLostCallback;
  48         private EventHandler onRelayoutEventHandler;
  49         private OnRelayoutEventCallbackType onRelayoutEventCallback;
  50         private EventHandler onWindowEventHandler;
  51         private OnWindowEventCallbackType onWindowEventCallback;
  52         private EventHandler<LayoutDirectionChangedEventArgs> layoutDirectionChangedEventHandler;
  53         private LayoutDirectionChangedEventCallbackType layoutDirectionChangedEventCallback;
  54         // Resource Ready Signal
  55         private EventHandler resourcesLoadedEventHandler;
  56         private ResourcesLoadedCallbackType ResourcesLoadedCallback;
  57         private EventHandler<BackgroundResourceLoadedEventArgs> backgroundResourceLoadedEventHandler;
  58         private _backgroundResourceLoadedCallbackType backgroundResourceLoadedCallback;
  59         private OnWindowEventCallbackType onWindowSendEventCallback;
  60         private void SendViewAddedEventToWindow(IntPtr data)
  61         {
  62             // Unused parameter
  63             _ = data;
  64             NUIApplication.GetDefaultWindow()?.SendViewAdded(this);
  65         }
  66
  67         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  68         private delegate void OffWindowEventCallbackType(IntPtr control);
  69         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  70         private delegate bool WheelEventCallbackType(IntPtr view, IntPtr wheelEvent);
  71         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  72         private delegate bool KeyCallbackType(IntPtr control, IntPtr keyEvent);
  73         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  74         private delegate bool TouchDataCallbackType(IntPtr view, IntPtr touchData);
  75         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  76         private delegate bool HoverEventCallbackType(IntPtr view, IntPtr hoverEvent);
  77         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  78         private delegate void VisibilityChangedEventCallbackType(IntPtr data, bool visibility, VisibilityChangeType type);
  79         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  80         private delegate void ResourcesLoadedCallbackType(IntPtr control);
  81         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  82         private delegate void _backgroundResourceLoadedCallbackType(IntPtr view);
  83         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  84         private delegate void KeyInputFocusGainedCallbackType(IntPtr control);
  85         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  86         private delegate void KeyInputFocusLostCallbackType(IntPtr control);
  87         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  88         private delegate void OnRelayoutEventCallbackType(IntPtr control);
  89         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  90         private delegate void OnWindowEventCallbackType(IntPtr control);
  91         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  92         private delegate void LayoutDirectionChangedEventCallbackType(IntPtr data, ViewLayoutDirectionType type);
  93
  94         /// <summary>
  95         /// Event when a child is removed.
  96         /// </summary>
  97         /// <since_tizen> 5 </since_tizen>
  98         public new event EventHandler<ChildRemovedEventArgs> ChildRemoved;
  99         /// <summary>
 100         /// Event when a child is added.
 101         /// </summary>
 102         /// <since_tizen> 5 </since_tizen>
 103         public new event EventHandler<ChildAddedEventArgs> ChildAdded;
 104
 105         /// <summary>
 106         /// An event for the KeyInputFocusGained signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 107         /// The KeyInputFocusGained signal is emitted when the control gets the key input focus.<br />
 108         /// </summary>
 109         /// <since_tizen> 3 </since_tizen>
 110         public event EventHandler FocusGained
 111         {
 112             add
 113             {
 114                 if (keyInputFocusGainedEventHandler == null)
 115                 {
 116                     keyInputFocusGainedCallback = OnKeyInputFocusGained;
 117                     using KeyInputFocusSignal signal = new KeyInputFocusSignal(Interop.ViewSignal.KeyInputFocusGainedSignal(SwigCPtr), false);
 118                     signal?.Connect(keyInputFocusGainedCallback);
 119                 }
 120                 keyInputFocusGainedEventHandler += value;
 121             }
 122
 123             remove
 124             {
 125                 keyInputFocusGainedEventHandler -= value;
 126                 if (keyInputFocusGainedEventHandler == null)
 127                 {
 128                     using KeyInputFocusSignal signal = new KeyInputFocusSignal(Interop.ViewSignal.KeyInputFocusGainedSignal(SwigCPtr), false);
 129                     if (signal?.Empty() == false)
 130                     {
 131                         signal?.Disconnect(keyInputFocusGainedCallback);
 132                         keyInputFocusGainedCallback = null;
 133                     }
 134                 }
 135             }
 136         }
 137
 138         /// <summary>
 139         /// An event for the KeyInputFocusLost signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 140         /// The KeyInputFocusLost signal is emitted when the control loses the key input focus.<br />
 141         /// </summary>
 142         /// <since_tizen> 3 </since_tizen>
 143         public event EventHandler FocusLost
 144         {
 145             add
 146             {
 147                 if (keyInputFocusLostEventHandler == null)
 148                 {
 149                     keyInputFocusLostCallback = OnKeyInputFocusLost;
 150                     using KeyInputFocusSignal signal = new KeyInputFocusSignal(Interop.ViewSignal.KeyInputFocusLostSignal(SwigCPtr), false);
 151                     signal?.Connect(keyInputFocusLostCallback);
 152                 }
 153                 keyInputFocusLostEventHandler += value;
 154             }
 155
 156             remove
 157             {
 158                 keyInputFocusLostEventHandler -= value;
 159                 if (keyInputFocusLostEventHandler == null)
 160                 {
 161                     using KeyInputFocusSignal signal = new KeyInputFocusSignal(Interop.ViewSignal.KeyInputFocusLostSignal(SwigCPtr), false);
 162                     if (signal?.Empty() == false)
 163                     {
 164                         signal?.Disconnect(keyInputFocusLostCallback);
 165                         keyInputFocusLostCallback = null;
 166                     }
 167                 }
 168             }
 169         }
 170
 171         /// <summary>
 172         /// An event for the KeyPressed signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 173         /// The KeyPressed signal is emitted when the key event is received.<br />
 174         /// </summary>
 175         /// <since_tizen> 3 </since_tizen>
 176         public event EventHandlerWithReturnType<object, KeyEventArgs, bool> KeyEvent
 177         {
 178             add
 179             {
 180                 if (keyEventHandler == null)
 181                 {
 182                     keyCallback = OnKeyEvent;
 183                     using ControlKeySignal signal = new ControlKeySignal(Interop.ViewSignal.KeyEventSignal(SwigCPtr), false);
 184                     signal?.Connect(keyCallback);
 185                 }
 186                 keyEventHandler += value;
 187             }
 188
 189             remove
 190             {
 191                 keyEventHandler -= value;
 192                 if (keyEventHandler == null)
 193                 {
 194                     using ControlKeySignal signal = new ControlKeySignal(Interop.ViewSignal.KeyEventSignal(SwigCPtr), false);
 195                     if (signal?.Empty() == false)
 196                     {
 197                         signal?.Disconnect(keyCallback);
 198                         keyCallback = null;
 199                     }
 200                 }
 201             }
 202         }
 203
 204         /// <summary>
 205         /// An event for the OnRelayout signal which can be used to subscribe or unsubscribe the event handler.<br />
 206         /// The OnRelayout signal is emitted after the size has been set on the view during relayout.<br />
 207         /// </summary>
 208         /// <since_tizen> 3 </since_tizen>
 209         public event EventHandler Relayout
 210         {
 211             add
 212             {
 213                 if (onRelayoutEventHandler == null)
 214                 {
 215                     onRelayoutEventCallback = OnRelayout;
 216                     using ViewSignal signal = new ViewSignal(Interop.ActorSignal.ActorOnRelayoutSignal(SwigCPtr), false);
 217                     signal?.Connect(onRelayoutEventCallback);
 218                 }
 219                 onRelayoutEventHandler += value;
 220             }
 221
 222             remove
 223             {
 224                 onRelayoutEventHandler -= value;
 225                 if (onRelayoutEventHandler == null)
 226                 {
 227                     using ViewSignal signal = new ViewSignal(Interop.ActorSignal.ActorOnRelayoutSignal(SwigCPtr), false);
 228                     if (signal?.Empty() == false)
 229                     {
 230                         signal?.Disconnect(onRelayoutEventCallback);
 231                         onRelayoutEventCallback = null;
 232                     }
 233                 }
 234             }
 235         }
 236
 237         /// <summary>
 238         /// An event for the touched signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 239         /// The touched signal is emitted when the touch input is received.<br />
 240         /// This can receive touch events before child. <br />
 241         /// If it returns false, the child can receive the touch event. If it returns true, the touch event is intercepted. So child cannot receive touch event.<br />
 242         /// </summary>
 243         [EditorBrowsable(EditorBrowsableState.Never)]
 244         public event EventHandlerWithReturnType<object, TouchEventArgs, bool> InterceptTouchEvent
 245         {
 246             add
 247             {
 248                 if (interceptTouchDataEventHandler == null)
 249                 {
 250                     interceptTouchDataCallback = OnInterceptTouch;
 251                     using TouchDataSignal signal = new TouchDataSignal(Interop.ActorSignal.ActorInterceptTouchSignal(SwigCPtr), false);
 252                     signal?.Connect(interceptTouchDataCallback);
 253                 }
 254                 interceptTouchDataEventHandler += value;
 255             }
 256
 257             remove
 258             {
 259                 interceptTouchDataEventHandler -= value;
 260                 if (interceptTouchDataEventHandler == null)
 261                 {
 262                     using TouchDataSignal signal = new TouchDataSignal(Interop.ActorSignal.ActorInterceptTouchSignal(SwigCPtr), false);
 263                     if (signal?.Empty() == false)
 264                     {
 265                         signal?.Disconnect(interceptTouchDataCallback);
 266                         interceptTouchDataCallback = null;
 267                     }
 268                 }
 269             }
 270         }
 271
 272         /// <summary>
 273         /// If child view doesn't want the parent's view to intercept the touch, you can set it to true.
 274         /// for example :
 275         ///    parent.Add(child);
 276         ///    parent.InterceptTouchEvent += OnInterceptTouchEvent;
 277         ///    View view = child.GetParent() as View;
 278         ///    view.DisallowInterceptTouchEvent = true;
 279         ///  This prevents the parent from intercepting touch.
 280         /// </summary>
 281         [EditorBrowsable(EditorBrowsableState.Never)]
 282         public bool DisallowInterceptTouchEvent { get; set; }
 283
 284
 285         /// <summary>
 286         /// An event for the touched signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 287         /// The touched signal is emitted when the touch input is received.<br />
 288         /// </summary>
 289         /// <since_tizen> 3 </since_tizen>
 290         public event EventHandlerWithReturnType<object, TouchEventArgs, bool> TouchEvent
 291         {
 292             add
 293             {
 294                 if (touchDataEventHandler == null)
 295                 {
 296                     touchDataCallback = OnTouch;
 297                     using TouchDataSignal signal = new TouchDataSignal(Interop.ActorSignal.ActorTouchSignal(SwigCPtr), false);
 298                     signal.Connect(touchDataCallback);
 299                 }
 300                 touchDataEventHandler += value;
 301             }
 302
 303             remove
 304             {
 305                 touchDataEventHandler -= value;
 306                 if (touchDataEventHandler == null)
 307                 {
 308                     using TouchDataSignal signal = new TouchDataSignal(Interop.ActorSignal.ActorTouchSignal(SwigCPtr), false);
 309                     if (signal.Empty() == false)
 310                     {
 311                         signal.Disconnect(touchDataCallback);
 312                         touchDataCallback = null;
 313                     }
 314                 }
 315             }
 316         }
 317
 318         /// <summary>
 319         /// An event for the hovered signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 320         /// The hovered signal is emitted when the hover input is received.<br />
 321         /// </summary>
 322         /// <since_tizen> 3 </since_tizen>
 323         public event EventHandlerWithReturnType<object, HoverEventArgs, bool> HoverEvent
 324         {
 325             add
 326             {
 327                 if (hoverEventHandler == null)
 328                 {
 329                     hoverEventCallback = OnHoverEvent;
 330                     using HoverSignal signal = new HoverSignal(Interop.ActorSignal.ActorHoveredSignal(SwigCPtr), false);
 331                     signal?.Connect(hoverEventCallback);
 332                 }
 333                 hoverEventHandler += value;
 334             }
 335
 336             remove
 337             {
 338                 hoverEventHandler -= value;
 339                 if (hoverEventHandler == null)
 340                 {
 341                     using HoverSignal signal = new HoverSignal(Interop.ActorSignal.ActorHoveredSignal(SwigCPtr), false);
 342                     if (signal?.Empty() == false)
 343                     {
 344                         signal?.Disconnect(hoverEventCallback);
 345                         hoverEventCallback = null;
 346                     }
 347                 }
 348             }
 349         }
 350
 351         /// <summary>
 352         /// An event for the WheelMoved signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 353         /// The WheelMoved signal is emitted when the wheel event is received.<br />
 354         /// </summary>
 355         /// <since_tizen> 3 </since_tizen>
 356         public event EventHandlerWithReturnType<object, WheelEventArgs, bool> WheelEvent
 357         {
 358             add
 359             {
 360                 if (wheelEventHandler == null)
 361                 {
 362                     wheelEventCallback = OnWheelEvent;
 363                     using WheelSignal signal = new WheelSignal(Interop.ActorSignal.ActorWheelEventSignal(SwigCPtr), false);
 364                     signal?.Connect(wheelEventCallback);
 365                 }
 366                 wheelEventHandler += value;
 367
 368                 if (WindowWheelEventHandler == null)
 369                 {
 370                     NUIApplication.GetDefaultWindow().WheelEvent += OnWindowWheelEvent;
 371                 }
 372                 WindowWheelEventHandler += value;
 373             }
 374
 375             remove
 376             {
 377                 wheelEventHandler -= value;
 378                 if (wheelEventHandler == null)
 379                 {
 380                     using WheelSignal signal = new WheelSignal(Interop.ActorSignal.ActorWheelEventSignal(SwigCPtr), false);
 381                     if (signal?.Empty() == false)
 382                     {
 383                         signal?.Disconnect(wheelEventCallback);
 384                         wheelEventCallback = null;
 385                     }
 386                 }
 387
 388                 WindowWheelEventHandler -= value;
 389                 if (WindowWheelEventHandler == null)
 390                 {
 391                     NUIApplication.GetDefaultWindow().WheelEvent -= OnWindowWheelEvent;
 392                 }
 393             }
 394         }
 395
 396         /// <summary>
 397         /// An event for the OnWindow signal which can be used to subscribe or unsubscribe the event handler.<br />
 398         /// The OnWindow signal is emitted after the view has been connected to the window.<br />
 399         /// </summary>
 400         /// <since_tizen> 3 </since_tizen>
 401         public event EventHandler AddedToWindow
 402         {
 403             add
 404             {
 405                 if (onWindowEventHandler == null)
 406                 {
 407                     onWindowEventCallback = OnWindow;
 408                     using ViewSignal signal = new ViewSignal(Interop.ActorSignal.ActorOnSceneSignal(SwigCPtr), false);
 409                     signal?.Connect(onWindowEventCallback);
 410                 }
 411                 onWindowEventHandler += value;
 412             }
 413
 414             remove
 415             {
 416                 onWindowEventHandler -= value;
 417                 if (onWindowEventHandler == null)
 418                 {
 419                     using ViewSignal signal = new ViewSignal(Interop.ActorSignal.ActorOnSceneSignal(SwigCPtr), false);
 420                     if (signal?.Empty() == false)
 421                     {
 422                         signal?.Disconnect(onWindowEventCallback);
 423                         onWindowEventCallback = null;
 424                     }
 425                 }
 426             }
 427         }
 428
 429         /// <summary>
 430         /// An event for the OffWindow signal, which can be used to subscribe or unsubscribe the event handler.<br />
 431         /// OffWindow signal is emitted after the view has been disconnected from the window.<br />
 432         /// </summary>
 433         /// <since_tizen> 3 </since_tizen>
 434         public event EventHandler RemovedFromWindow
 435         {
 436             add
 437             {
 438                 if (offWindowEventHandler == null)
 439                 {
 440                     offWindowEventCallback = OffWindow;
 441                     using ViewSignal signal = new ViewSignal(Interop.ActorSignal.ActorOffSceneSignal(SwigCPtr), false);
 442                     signal?.Connect(offWindowEventCallback);
 443                 }
 444                 offWindowEventHandler += value;
 445             }
 446
 447             remove
 448             {
 449                 offWindowEventHandler -= value;
 450                 if (offWindowEventHandler == null)
 451                 {
 452                     using ViewSignal signal = new ViewSignal(Interop.ActorSignal.ActorOffSceneSignal(SwigCPtr), false);
 453                     if (signal?.Empty() == false)
 454                     {
 455                         signal?.Disconnect(offWindowEventCallback);
 456                         offWindowEventCallback = null;
 457                     }
 458                 }
 459             }
 460         }
 461
 462         /// <summary>
 463         /// An event for visibility change which can be used to subscribe or unsubscribe the event handler.<br />
 464         /// This signal is emitted when the visible property of this or a parent view is changed.<br />
 465         /// </summary>
 466         /// <since_tizen> 3 </since_tizen>
 467         public event EventHandler<VisibilityChangedEventArgs> VisibilityChanged
 468         {
 469             add
 470             {
 471                 if (visibilityChangedEventHandler == null)
 472                 {
 473                     visibilityChangedEventCallback = OnVisibilityChanged;
 474                     VisibilityChangedSignal(this).Connect(visibilityChangedEventCallback);
 475                 }
 476
 477                 visibilityChangedEventHandler += value;
 478             }
 479
 480             remove
 481             {
 482                 visibilityChangedEventHandler -= value;
 483
 484                 if (visibilityChangedEventHandler == null && VisibilityChangedSignal(this).Empty() == false)
 485                 {
 486                     VisibilityChangedSignal(this).Disconnect(visibilityChangedEventCallback);
 487                 }
 488             }
 489         }
 490
 491         /// <summary>
 492         /// Event for layout direction change which can be used to subscribe/unsubscribe the event handler.<br />
 493         /// This signal is emitted when the layout direction property of this or a parent view is changed.<br />
 494         /// </summary>
 495         /// <since_tizen> 4 </since_tizen>
 496         public event EventHandler<LayoutDirectionChangedEventArgs> LayoutDirectionChanged
 497         {
 498             add
 499             {
 500                 if (layoutDirectionChangedEventHandler == null)
 501                 {
 502                     layoutDirectionChangedEventCallback = OnLayoutDirectionChanged;
 503                     LayoutDirectionChangedSignal(this).Connect(layoutDirectionChangedEventCallback);
 504                 }
 505
 506                 layoutDirectionChangedEventHandler += value;
 507             }
 508
 509             remove
 510             {
 511                 layoutDirectionChangedEventHandler -= value;
 512
 513                 if (layoutDirectionChangedEventHandler == null && LayoutDirectionChangedSignal(this).Empty() == false)
 514                 {
 515                     LayoutDirectionChangedSignal(this).Disconnect(layoutDirectionChangedEventCallback);
 516                 }
 517             }
 518         }
 519
 520         /// <summary>
 521         /// An event for the ResourcesLoadedSignal signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 522         /// This signal is emitted after all resources required by a view are loaded and ready.<br />
 523         /// </summary>
 524         /// <since_tizen> 3 </since_tizen>
 525         public event EventHandler ResourcesLoaded
 526         {
 527             add
 528             {
 529                 if (resourcesLoadedEventHandler == null)
 530                 {
 531                     ResourcesLoadedCallback = OnResourcesLoaded;
 532                     using ViewSignal signal = new ViewSignal(Interop.View.ResourceReadySignal(SwigCPtr), false);
 533                     signal?.Connect(ResourcesLoadedCallback);
 534                 }
 535                 resourcesLoadedEventHandler += value;
 536             }
 537
 538             remove
 539             {
 540                 resourcesLoadedEventHandler -= value;
 541                 if (resourcesLoadedEventHandler == null)
 542                 {
 543                     using ViewSignal signal = new ViewSignal(Interop.View.ResourceReadySignal(SwigCPtr), false);
 544                     if (signal?.Empty() == false)
 545                     {
 546                         signal?.Disconnect(ResourcesLoadedCallback);
 547                         ResourcesLoadedCallback = null;
 548                     }
 549                 }
 550             }
 551         }
 552
 553         private EventHandler _backKeyPressed;
 554
 555         /// <summary>
 556         /// An event for getting notice when physical back key is pressed.<br />
 557         /// This event is emitted BackKey is up.<br />
 558         /// </summary>
 559         [EditorBrowsable(EditorBrowsableState.Never)]
 560         public event EventHandler BackKeyPressed
 561         {
 562             add
 563             {
 564                 _backKeyPressed += value;
 565                 BackKeyManager.Instance.Subscriber.Add(this);
 566             }
 567
 568             remove
 569             {
 570                 BackKeyManager.Instance.Subscriber.Remove(this);
 571                 _backKeyPressed -= value;
 572             }
 573         }
 574
 575         /// <summary>
 576         /// Function for emitting BackKeyPressed event outside of View instance
 577         /// </summary>
 578         [EditorBrowsable(EditorBrowsableState.Never)]
 579         internal void EmitBackKeyPressed()
 580         {
 581             _backKeyPressed.Invoke(this, null);
 582         }
 583
 584
 585         internal event EventHandler<BackgroundResourceLoadedEventArgs> BackgroundResourceLoaded
 586         {
 587             add
 588             {
 589                 if (backgroundResourceLoadedEventHandler == null)
 590                 {
 591                     backgroundResourceLoadedCallback = OnBackgroundResourceLoaded;
 592                     using ViewSignal signal = new ViewSignal(Interop.View.ResourceReadySignal(SwigCPtr), false);
 593                     signal?.Connect(backgroundResourceLoadedCallback);
 594                 }
 595                 backgroundResourceLoadedEventHandler += value;
 596             }
 597
 598             remove
 599             {
 600                 backgroundResourceLoadedEventHandler -= value;
 601                 if (backgroundResourceLoadedEventHandler == null)
 602                 {
 603                     using ViewSignal signal = new ViewSignal(Interop.View.ResourceReadySignal(SwigCPtr), false);
 604                     if (signal?.Empty() == false)
 605                     {
 606                         signal?.Disconnect(backgroundResourceLoadedCallback);
 607                         backgroundResourceLoadedCallback = null;
 608                     }
 609                 }
 610             }
 611         }
 612
 613         internal TouchDataSignal InterceptTouchSignal()
 614         {
 615             TouchDataSignal ret = new TouchDataSignal(Interop.ActorSignal.ActorInterceptTouchSignal(SwigCPtr), false);
 616             if (NDalicPINVOKE.SWIGPendingException.Pending)
 617                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 618             return ret;
 619         }
 620
 621         internal TouchDataSignal TouchSignal()
 622         {
 623             TouchDataSignal ret = new TouchDataSignal(Interop.ActorSignal.ActorTouchSignal(SwigCPtr), false);
 624             if (NDalicPINVOKE.SWIGPendingException.Pending)
 625                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 626             return ret;
 627         }
 628
 629         internal HoverSignal HoveredSignal()
 630         {
 631             HoverSignal ret = new HoverSignal(Interop.ActorSignal.ActorHoveredSignal(SwigCPtr), false);
 632             if (NDalicPINVOKE.SWIGPendingException.Pending)
 633                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 634             return ret;
 635         }
 636
 637         internal WheelSignal WheelEventSignal()
 638         {
 639             WheelSignal ret = new WheelSignal(Interop.ActorSignal.ActorWheelEventSignal(SwigCPtr), false);
 640             if (NDalicPINVOKE.SWIGPendingException.Pending)
 641                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 642             return ret;
 643         }
 644
 645         internal ViewSignal OnWindowSignal()
 646         {
 647             ViewSignal ret = new ViewSignal(Interop.ActorSignal.ActorOnSceneSignal(SwigCPtr), false);
 648             if (NDalicPINVOKE.SWIGPendingException.Pending)
 649                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 650             return ret;
 651         }
 652
 653         internal ViewSignal OffWindowSignal()
 654         {
 655             ViewSignal ret = new ViewSignal(Interop.ActorSignal.ActorOffSceneSignal(SwigCPtr), false);
 656             if (NDalicPINVOKE.SWIGPendingException.Pending)
 657                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 658             return ret;
 659         }
 660
 661         internal ViewSignal OnRelayoutSignal()
 662         {
 663             ViewSignal ret = new ViewSignal(Interop.ActorSignal.ActorOnRelayoutSignal(SwigCPtr), false);
 664             if (NDalicPINVOKE.SWIGPendingException.Pending)
 665                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 666             return ret;
 667         }
 668
 669         internal ViewVisibilityChangedSignal VisibilityChangedSignal(View view)
 670         {
 671             ViewVisibilityChangedSignal ret = new ViewVisibilityChangedSignal(Interop.NDalic.VisibilityChangedSignal(View.getCPtr(view)), false);
 672             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 673             return ret;
 674         }
 675
 676         internal ViewLayoutDirectionChangedSignal LayoutDirectionChangedSignal(View view)
 677         {
 678             ViewLayoutDirectionChangedSignal ret = new ViewLayoutDirectionChangedSignal(Interop.Layout.LayoutDirectionChangedSignal(View.getCPtr(view)), false);
 679             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 680             return ret;
 681         }
 682
 683         internal ViewSignal ResourcesLoadedSignal()
 684         {
 685             ViewSignal ret = new ViewSignal(Interop.View.ResourceReadySignal(SwigCPtr), false);
 686             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 687             return ret;
 688         }
 689
 690         internal ControlKeySignal KeyEventSignal()
 691         {
 692             ControlKeySignal ret = new ControlKeySignal(Interop.ViewSignal.KeyEventSignal(SwigCPtr), false);
 693             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 694             return ret;
 695         }
 696
 697         internal KeyInputFocusSignal KeyInputFocusGainedSignal()
 698         {
 699             KeyInputFocusSignal ret = new KeyInputFocusSignal(Interop.ViewSignal.KeyInputFocusGainedSignal(SwigCPtr), false);
 700             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 701             return ret;
 702         }
 703
 704         internal KeyInputFocusSignal KeyInputFocusLostSignal()
 705         {
 706             KeyInputFocusSignal ret = new KeyInputFocusSignal(Interop.ViewSignal.KeyInputFocusLostSignal(SwigCPtr), false);
 707             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 708             return ret;
 709         }
 710
 711         private void OnSize2DChanged(int? width, int? height)
 712         {
 713             PropertyValue temp = null;
 714             if (width != null)
 715             {
 716                 temp = new PropertyValue((float)width);
 717                 Object.SetProperty(SwigCPtr, Property.SizeWidth, temp);
 718             }
 719             if (height != null)
 720             {
 721                 temp = new PropertyValue((float)height);
 722                 Object.SetProperty(SwigCPtr, Property.SizeHeight, temp);
 723             }
 724             temp?.Dispose();
 725         }
 726
 727         private void OnMinimumSizeChanged(int? width, int? height)
 728         {
 729             if (width != null && height != null)
 730             {
 731                 MinimumSize = new Size2D((int)width, (int)height);
 732             }
 733             else if (width != null && height == null)
 734             {
 735                 MinimumSize = new Size2D((int)width, (int)this.GetMinimumSize().Height);
 736             }
 737             else if (width == null && height != null)
 738             {
 739                 MinimumSize = new Size2D((int)this.GetMinimumSize().Width, (int)height);
 740             }
 741             else
 742             {
 743                 //both are null, do nothing.
 744             }
 745         }
 746
 747         private void OnMaximumSizeChanged(int? width, int? height)
 748         {
 749             if (width != null && height != null)
 750             {
 751                 MaximumSize = new Size2D((int)width, (int)height);
 752             }
 753             else if (width != null && height == null)
 754             {
 755                 MaximumSize = new Size2D((int)width, (int)this.GetMaximumSize().Height);
 756             }
 757             else if (width == null && height != null)
 758             {
 759                 MaximumSize = new Size2D((int)this.GetMaximumSize().Width, (int)height);
 760             }
 761             else
 762             {
 763                 //both are null, do nothing.
 764             }
 765         }
 766
 767         private void OnPosition2DChanged(int x, int y)
 768         {
 769             Position2D = new Position2D(x, y);
 770         }
 771
 772         private void OnSizeChanged(float? width, float? height, float? depth)
 773         {
 774             PropertyValue temp;
 775             if (width != null)
 776             {
 777                 temp = new Tizen.NUI.PropertyValue((float)width);
 778                 Tizen.NUI.Object.SetProperty(this.SwigCPtr, View.Property.SizeWidth, temp);
 779                 temp.Dispose();
 780             }
 781             if (height != null)
 782             {
 783                 temp = new Tizen.NUI.PropertyValue((float)height);
 784                 Tizen.NUI.Object.SetProperty(this.SwigCPtr, View.Property.SizeHeight, temp);
 785                 temp.Dispose();
 786             }
 787             if (depth != null)
 788             {
 789                 temp = new Tizen.NUI.PropertyValue((float)depth);
 790                 Tizen.NUI.Object.SetProperty(this.SwigCPtr, View.Property.SizeDepth, temp);
 791                 temp.Dispose();
 792             }
 793         }
 794
 795         private void OnPositionChanged(float x, float y, float z)
 796         {
 797             Position = new Position(x, y, z);
 798         }
 799
 800         private void OnParentOriginChanged(float x, float y, float z)
 801         {
 802             ParentOrigin = new Position(x, y, z);
 803         }
 804
 805         private void OnPivotPointChanged(float x, float y, float z)
 806         {
 807             PivotPoint = new Position(x, y, z);
 808         }
 809
 810         private void OnImageShadowChanged(ShadowBase instance)
 811         {
 812             ImageShadow = (ImageShadow)instance;
 813         }
 814
 815         private void OnBoxShadowChanged(ShadowBase instance)
 816         {
 817             BoxShadow = (Shadow)instance;
 818         }
 819
 820         private void OnBackgroundImageBorderChanged(int left, int right, int bottom, int top)
 821         {
 822             BackgroundImageBorder = new Rectangle(left, right, bottom, top);
 823         }
 824
 825         private void OnKeyInputFocusGained(IntPtr view)
 826         {
 827             if (keyInputFocusGainedEventHandler != null)
 828             {
 829                 keyInputFocusGainedEventHandler(this, null);
 830             }
 831         }
 832
 833         private void OnKeyInputFocusLost(IntPtr view)
 834         {
 835             if (keyInputFocusLostEventHandler != null)
 836             {
 837                 keyInputFocusLostEventHandler(this, null);
 838             }
 839         }
 840
 841         private bool OnKeyEvent(IntPtr view, IntPtr keyEvent)
 842         {
 843             if (keyEvent == global::System.IntPtr.Zero)
 844             {
 845                 NUILog.Error("keyEvent should not be null!");
 846                 return true;
 847             }
 848
 849             KeyEventArgs e = new KeyEventArgs();
 850
 851             bool result = false;
 852
 853             e.Key = Tizen.NUI.Key.GetKeyFromPtr(keyEvent);
 854
 855             if (keyEventHandler != null)
 856             {
 857                 Delegate[] delegateList = keyEventHandler.GetInvocationList();
 858
 859                 // Oring the result of each callback.
 860                 foreach (EventHandlerWithReturnType<object, KeyEventArgs, bool> del in delegateList)
 861                 {
 862                     result |= del(this, e);
 863                 }
 864             }
 865
 866             return result;
 867         }
 868
 869         // Callback for View OnRelayout signal
 870         private void OnRelayout(IntPtr data)
 871         {
 872             if (onRelayoutEventHandler != null)
 873             {
 874                 onRelayoutEventHandler(this, null);
 875             }
 876         }
 877
 878         // Callback for View TouchSignal
 879         private bool OnInterceptTouch(IntPtr view, IntPtr touchData)
 880         {
 881             if (touchData == global::System.IntPtr.Zero)
 882             {
 883                 NUILog.Error("touchData should not be null!");
 884                 return true;
 885             }
 886
 887             // DisallowInterceptTouchEvent prevents the parent from intercepting touch.
 888             if (DisallowInterceptTouchEvent)
 889             {
 890                 return false;
 891             }
 892
 893             TouchEventArgs e = new TouchEventArgs();
 894
 895             e.Touch = Tizen.NUI.Touch.GetTouchFromPtr(touchData);
 896
 897             bool consumed = false;
 898
 899             if (interceptTouchDataEventHandler != null)
 900             {
 901                 consumed = interceptTouchDataEventHandler(this, e);
 902             }
 903
 904             return consumed;
 905         }
 906
 907         // Callback for View TouchSignal
 908         private bool OnTouch(IntPtr view, IntPtr touchData)
 909         {
 910             if (touchData == global::System.IntPtr.Zero)
 911             {
 912                 NUILog.Error("touchData should not be null!");
 913                 return true;
 914             }
 915
 916             TouchEventArgs e = new TouchEventArgs();
 917
 918             e.Touch = Tizen.NUI.Touch.GetTouchFromPtr(touchData);
 919
 920             bool consumed = false;
 921
 922             if (touchDataEventHandler != null)
 923             {
 924                 consumed = touchDataEventHandler(this, e);
 925             }
 926
 927             if (enableControlState && !consumed)
 928             {
 929                 consumed = HandleControlStateOnTouch(e.Touch);
 930             }
 931
 932             return consumed;
 933         }
 934
 935         // Callback for View Hover signal
 936         private bool OnHoverEvent(IntPtr view, IntPtr hoverEvent)
 937         {
 938             if (hoverEvent == global::System.IntPtr.Zero)
 939             {
 940                 NUILog.Error("hoverEvent should not be null!");
 941                 return true;
 942             }
 943
 944             HoverEventArgs e = new HoverEventArgs();
 945
 946             e.Hover = Tizen.NUI.Hover.GetHoverFromPtr(hoverEvent);
 947
 948             if (hoverEventHandler != null)
 949             {
 950                 return hoverEventHandler(this, e);
 951             }
 952             return false;
 953         }
 954
 955         // Callback for View Wheel signal
 956         private bool OnWheelEvent(IntPtr view, IntPtr wheelEvent)
 957         {
 958             if (wheelEvent == global::System.IntPtr.Zero)
 959             {
 960                 NUILog.Error("wheelEvent should not be null!");
 961                 return true;
 962             }
 963
 964             WheelEventArgs e = new WheelEventArgs();
 965
 966             e.Wheel = Tizen.NUI.Wheel.GetWheelFromPtr(wheelEvent);
 967
 968             if (wheelEventHandler != null)
 969             {
 970                 return wheelEventHandler(this, e);
 971             }
 972             return false;
 973         }
 974
 975         // Callback for View OnWindow signal
 976         private void OnWindow(IntPtr data)
 977         {
 978             if (onWindowEventHandler != null)
 979             {
 980                 onWindowEventHandler(this, null);
 981             }
 982         }
 983
 984         // Callback for View OffWindow signal
 985         private void OffWindow(IntPtr data)
 986         {
 987             if (offWindowEventHandler != null)
 988             {
 989                 offWindowEventHandler(this, null);
 990             }
 991         }
 992
 993         // Callback for View visibility change signal
 994         private void OnVisibilityChanged(IntPtr data, bool visibility, VisibilityChangeType type)
 995         {
 996             VisibilityChangedEventArgs e = new VisibilityChangedEventArgs();
 997             if (data != null)
 998             {
 999                 e.View = Registry.GetManagedBaseHandleFromNativePtr(data) as View;
1000             }
1001             e.Visibility = visibility;
1002             e.Type = type;
1003
1004             if (visibilityChangedEventHandler != null)
1005             {
1006                 visibilityChangedEventHandler(this, e);
1007             }
1008         }
1009
1010         // Callback for View layout direction change signal
1011         private void OnLayoutDirectionChanged(IntPtr data, ViewLayoutDirectionType type)
1012         {
1013             LayoutDirectionChangedEventArgs e = new LayoutDirectionChangedEventArgs();
1014             if (data != null)
1015             {
1016                 e.View = Registry.GetManagedBaseHandleFromNativePtr(data) as View;
1017             }
1018             e.Type = type;
1019
1020             if (layoutDirectionChangedEventHandler != null)
1021             {
1022                 layoutDirectionChangedEventHandler(this, e);
1023             }
1024         }
1025
1026         private void OnResourcesLoaded(IntPtr view)
1027         {
1028             if (resourcesLoadedEventHandler != null)
1029             {
1030                 resourcesLoadedEventHandler(this, null);
1031             }
1032         }
1033
1034         private void OnBackgroundResourceLoaded(IntPtr view)
1035         {
1036             BackgroundResourceLoadedEventArgs e = new BackgroundResourceLoadedEventArgs();
1037             e.Status = (ResourceLoadingStatusType)Interop.View.GetVisualResourceStatus(this.SwigCPtr, Property.BACKGROUND);
1038
1039             if (backgroundResourceLoadedEventHandler != null)
1040             {
1041                 backgroundResourceLoadedEventHandler(this, e);
1042             }
1043         }
1044
1045         /// <summary>
1046         /// Event argument passed through the ChildAdded event.
1047         /// </summary>
1048         /// <since_tizen> 5 </since_tizen>
1049         public class ChildAddedEventArgs : EventArgs
1050         {
1051             /// <summary>
1052             /// Added child view at moment.
1053             /// </summary>
1054             /// <since_tizen> 5 </since_tizen>
1055             public View Added { get; set; }
1056         }
1057
1058         /// <summary>
1059         /// Event argument passed through the ChildRemoved event.
1060         /// </summary>
1061         /// <since_tizen> 5 </since_tizen>
1062         public class ChildRemovedEventArgs : EventArgs
1063         {
1064             /// <summary>
1065             /// Removed child view at moment.
1066             /// </summary>
1067             /// <since_tizen> 5 </since_tizen>
1068             public View Removed { get; set; }
1069         }
1070
1071         /// <summary>
1072         /// Event arguments that passed via the KeyEvent signal.
1073         /// </summary>
1074         /// <since_tizen> 3 </since_tizen>
1075         public class KeyEventArgs : EventArgs
1076         {
1077             private Key _key;
1078
1079             /// <summary>
1080             /// Key - is the key sent to the view.
1081             /// </summary>
1082             /// <since_tizen> 3 </since_tizen>
1083             public Key Key
1084             {
1085                 get
1086                 {
1087                     return _key;
1088                 }
1089                 set
1090                 {
1091                     _key = value;
1092                 }
1093             }
1094         }
1095
1096         /// <summary>
1097         /// Event arguments that passed via the touch signal.
1098         /// </summary>
1099         /// <since_tizen> 3 </since_tizen>
1100         public class TouchEventArgs : EventArgs
1101         {
1102             private Touch _touch;
1103
1104             /// <summary>
1105             /// Touch - contains the information of touch points.
1106             /// </summary>
1107             /// <since_tizen> 3 </since_tizen>
1108             public Touch Touch
1109             {
1110                 get
1111                 {
1112                     return _touch;
1113                 }
1114                 set
1115                 {
1116                     _touch = value;
1117                 }
1118             }
1119         }
1120
1121         /// <summary>
1122         /// Event arguments that passed via the hover signal.
1123         /// </summary>
1124         /// <since_tizen> 3 </since_tizen>
1125         public class HoverEventArgs : EventArgs
1126         {
1127             private Hover _hover;
1128
1129             /// <summary>
1130             /// Hover - contains touch points that represent the points that are currently being hovered or the points where a hover has stopped.
1131             /// </summary>
1132             /// <since_tizen> 3 </since_tizen>
1133             public Hover Hover
1134             {
1135                 get
1136                 {
1137                     return _hover;
1138                 }
1139                 set
1140                 {
1141                     _hover = value;
1142                 }
1143             }
1144         }
1145
1146         /// <summary>
1147         /// Event arguments that passed via the wheel signal.
1148         /// </summary>
1149         /// <since_tizen> 3 </since_tizen>
1150         public class WheelEventArgs : EventArgs
1151         {
1152             private Wheel _wheel;
1153
1154             /// <summary>
1155             /// WheelEvent - store a wheel rolling type: MOUSE_WHEEL or CUSTOM_WHEEL.
1156             /// </summary>
1157             /// <since_tizen> 3 </since_tizen>
1158             public Wheel Wheel
1159             {
1160                 get
1161                 {
1162                     return _wheel;
1163                 }
1164                 set
1165                 {
1166                     _wheel = value;
1167                 }
1168             }
1169         }
1170
1171         /// <summary>
1172         /// Event arguments of visibility changed.
1173         /// </summary>
1174         /// <since_tizen> 3 </since_tizen>
1175         public class VisibilityChangedEventArgs : EventArgs
1176         {
1177             private View _view;
1178             private bool _visibility;
1179             private VisibilityChangeType _type;
1180
1181             /// <summary>
1182             /// The view, or child of view, whose visibility has changed.
1183             /// </summary>
1184             /// <since_tizen> 3 </since_tizen>
1185             public View View
1186             {
1187                 get
1188                 {
1189                     return _view;
1190                 }
1191                 set
1192                 {
1193                     _view = value;
1194                 }
1195             }
1196
1197             /// <summary>
1198             /// Whether the view is now visible or not.
1199             /// </summary>
1200             /// <since_tizen> 3 </since_tizen>
1201             public bool Visibility
1202             {
1203                 get
1204                 {
1205                     return _visibility;
1206                 }
1207                 set
1208                 {
1209                     _visibility = value;
1210                 }
1211             }
1212
1213             /// <summary>
1214             /// Whether the view's visible property has changed or a parent's.
1215             /// </summary>
1216             /// <since_tizen> 3 </since_tizen>
1217             public VisibilityChangeType Type
1218             {
1219                 get
1220                 {
1221                     return _type;
1222                 }
1223                 set
1224                 {
1225                     _type = value;
1226                 }
1227             }
1228         }
1229
1230         /// <summary>
1231         /// Event arguments of layout direction changed.
1232         /// </summary>
1233         /// <since_tizen> 4 </since_tizen>
1234         public class LayoutDirectionChangedEventArgs : EventArgs
1235         {
1236             private View _view;
1237             private ViewLayoutDirectionType _type;
1238
1239             /// <summary>
1240             /// The view, or child of view, whose layout direction has changed.
1241             /// </summary>
1242             /// <since_tizen> 4 </since_tizen>
1243             public View View
1244             {
1245                 get
1246                 {
1247                     return _view;
1248                 }
1249                 set
1250                 {
1251                     _view = value;
1252                 }
1253             }
1254
1255             /// <summary>
1256             /// Whether the view's layout direction property has changed or a parent's.
1257             /// </summary>
1258             /// <since_tizen> 4 </since_tizen>
1259             public ViewLayoutDirectionType Type
1260             {
1261                 get
1262                 {
1263                     return _type;
1264                 }
1265                 set
1266                 {
1267                     _type = value;
1268                 }
1269             }
1270         }
1271
1272         internal class BackgroundResourceLoadedEventArgs : EventArgs
1273         {
1274             private ResourceLoadingStatusType status = ResourceLoadingStatusType.Invalid;
1275             public ResourceLoadingStatusType Status
1276             {
1277                 get
1278                 {
1279                     return status;
1280                 }
1281                 set
1282                 {
1283                     status = value;
1284                 }
1285             }
1286         }
1287
1288         /// <summary>
1289         /// The class represents the information of the situation where the View's control state changes.
1290         /// </summary>
1291         [EditorBrowsable(EditorBrowsableState.Never)]
1292         public class ControlStateChangedEventArgs : EventArgs
1293         {
1294             /// <summary>
1295             /// Create an instance with mandatory fields.
1296             /// </summary>
1297             /// <param name="previousState">The previous control state.</param>
1298             /// <param name="currentState">The current control state.</param>
1299             [EditorBrowsable(EditorBrowsableState.Never)]
1300             public ControlStateChangedEventArgs(ControlState previousState, ControlState currentState)
1301             {
1302                 PreviousState = previousState;
1303                 CurrentState = currentState;
1304             }
1305
1306             /// <summary>
1307             /// The previous control state.
1308             /// </summary>
1309             [EditorBrowsable(EditorBrowsableState.Never)]
1310             public ControlState PreviousState { get; }
1311
1312             /// <summary>
1313             /// The current control state.
1314             /// </summary>
1315             [EditorBrowsable(EditorBrowsableState.Never)]
1316             public ControlState CurrentState { get; }
1317         }
1318
1319         private EventHandlerWithReturnType<object, WheelEventArgs, bool> WindowWheelEventHandler;
1320         private void OnWindowWheelEvent(object sender, Window.WheelEventArgs e)
1321         {
1322             if (e != null)
1323             {
1324                 if (e.Wheel.Type == Wheel.WheelType.CustomWheel)
1325                 {
1326                     var arg = new WheelEventArgs()
1327                     {
1328                         Wheel = e.Wheel,
1329                     };
1330                     WindowWheelEventHandler?.Invoke(this, arg);
1331                 }
1332             }
1333         }
1334
1335         /// <summary>
1336         /// The expanded touch area.
1337         /// TouchArea can expand the view's touchable area.<br/>
1338         /// If you set the TouchAreaOffset on an view, when you touch the view, the touch area is used rather than the size of the view.<br/>
1339         /// </summary>
1340         /// <remarks>
1341         /// This is based on the top left x, y coordinates.<br/>
1342         /// For example) <br/>
1343         /// <code>
1344         ///  view.Size = new Size(100, 100);
1345         ///  view.TouchAreaOffset = new Offset(-10, 20, 30, -40); // left, right, bottom, top
1346         /// </code>
1347         /// Then, touch area is 130x170.<br/>
1348         /// This is view.width + TouchAreaOffset.right - TouchAreaOffset.left and view.height + TouchAreaOffset.bottom - TouchAreaOffset.top <br/>
1349         /// +---------------------+ <br/>
1350         /// |         ^           | <br/>
1351         /// |         |           | <br/>
1352         /// |         | -40       | <br/>
1353         /// |         |           | <br/>
1354         /// |         |           | <br/>
1355         /// |    +----+----+      | <br/>
1356         /// |    |         |      | <br/>
1357         /// | -10|         | 20   | <br/>
1358         /// |&lt;---+         +-----&gt;| <br/>
1359         /// |    |         |      | <br/>
1360         /// |    |         |      | <br/>
1361         /// |    +----+----+      | <br/>
1362         /// |         |           | <br/>
1363         /// |         | 30        | <br/>
1364         /// |         |           | <br/>
1365         /// |         v           | <br/>
1366         /// +---------------------+ <br/>
1367         /// </remarks>
1368         [EditorBrowsable(EditorBrowsableState.Never)]
1369         public Offset TouchAreaOffset
1370         {
1371             get
1372             {
1373                 return (Offset)GetValue(TouchAreaOffsetProperty);
1374             }
1375             set
1376             {
1377                 SetValue(TouchAreaOffsetProperty, value);
1378                 NotifyPropertyChanged();
1379             }
1380         }
1381
1382         private Offset InternalTouchAreaOffset
1383         {
1384             get
1385             {
1386                 Interop.ActorInternal.GetTouchAreaOffset(SwigCPtr, out int left, out int right, out int bottom, out int top);
1387                 if (NDalicPINVOKE.SWIGPendingException.Pending)
1388                     throw NDalicPINVOKE.SWIGPendingException.Retrieve();
1389                 return new Offset(left, right, bottom, top);
1390             }
1391             set
1392             {
1393                 Interop.ActorInternal.SetTouchAreaOffset(SwigCPtr, value.Left, value.Right, value.Bottom, value.Top);
1394                 if (NDalicPINVOKE.SWIGPendingException.Pending)
1395                     throw NDalicPINVOKE.SWIGPendingException.Retrieve();
1396             }
1397         }
1398
1399     }
1400 }