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

   1 /*
   2  * Copyright(c) 2020 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 using Tizen.NUI.Components;
  22
  23 namespace Tizen.NUI.BaseComponents
  24 {
  25     /// <summary>
  26     /// View is the base class for all views.
  27     /// </summary>
  28     /// <since_tizen> 3 </since_tizen>
  29     public partial class View
  30     {
  31         private EventHandler _offWindowEventHandler;
  32         private OffWindowEventCallbackType _offWindowEventCallback;
  33         private EventHandlerWithReturnType<object, WheelEventArgs, bool> _wheelEventHandler;
  34         private WheelEventCallbackType _wheelEventCallback;
  35         private EventHandlerWithReturnType<object, KeyEventArgs, bool> _keyEventHandler;
  36         private KeyCallbackType _keyCallback;
  37         private EventHandlerWithReturnType<object, TouchEventArgs, bool> _interceptTouchDataEventHandler;
  38         private TouchDataCallbackType _interceptTouchDataCallback;
  39         private EventHandlerWithReturnType<object, TouchEventArgs, bool> _touchDataEventHandler;
  40         private TouchDataCallbackType _touchDataCallback;
  41         private EventHandlerWithReturnType<object, HoverEventArgs, bool> _hoverEventHandler;
  42         private HoverEventCallbackType _hoverEventCallback;
  43         private EventHandler<VisibilityChangedEventArgs> _visibilityChangedEventHandler;
  44         private VisibilityChangedEventCallbackType _visibilityChangedEventCallback;
  45         private EventHandler _keyInputFocusGainedEventHandler;
  46         private KeyInputFocusGainedCallbackType _keyInputFocusGainedCallback;
  47         private EventHandler _keyInputFocusLostEventHandler;
  48         private KeyInputFocusLostCallbackType _keyInputFocusLostCallback;
  49         private EventHandler _onRelayoutEventHandler;
  50         private OnRelayoutEventCallbackType _onRelayoutEventCallback;
  51         private EventHandler _onWindowEventHandler;
  52         private OnWindowEventCallbackType _onWindowEventCallback;
  53         private EventHandler<LayoutDirectionChangedEventArgs> _layoutDirectionChangedEventHandler;
  54         private LayoutDirectionChangedEventCallbackType _layoutDirectionChangedEventCallback;
  55         // Resource Ready Signal
  56         private EventHandler _resourcesLoadedEventHandler;
  57         private ResourcesLoadedCallbackType _ResourcesLoadedCallback;
  58         private EventHandler<BackgroundResourceLoadedEventArgs> _backgroundResourceLoadedEventHandler;
  59         private _backgroundResourceLoadedCallbackType _backgroundResourceLoadedCallback;
  60
  61         private OnWindowEventCallbackType _onWindowSendEventCallback;
  62
  63         private void SendViewAddedEventToWindow(IntPtr data)
  64         {
  65             // Unused parameter
  66             _ = data;
  67
  68             NUIApplication.GetDefaultWindow()?.SendViewAdded(this);
  69         }
  70
  71         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  72         private delegate void OffWindowEventCallbackType(IntPtr control);
  73         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  74         private delegate bool WheelEventCallbackType(IntPtr view, IntPtr wheelEvent);
  75         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  76         private delegate bool KeyCallbackType(IntPtr control, IntPtr keyEvent);
  77         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  78         private delegate bool TouchDataCallbackType(IntPtr view, IntPtr touchData);
  79         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  80         private delegate bool HoverEventCallbackType(IntPtr view, IntPtr hoverEvent);
  81         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  82         private delegate void VisibilityChangedEventCallbackType(IntPtr data, bool visibility, VisibilityChangeType type);
  83         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  84         private delegate void ResourcesLoadedCallbackType(IntPtr control);
  85         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  86         private delegate void _backgroundResourceLoadedCallbackType(IntPtr view);
  87         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  88         private delegate void KeyInputFocusGainedCallbackType(IntPtr control);
  89         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  90         private delegate void KeyInputFocusLostCallbackType(IntPtr control);
  91         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  92         private delegate void OnRelayoutEventCallbackType(IntPtr control);
  93         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  94         private delegate void OnWindowEventCallbackType(IntPtr control);
  95         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  96         private delegate void LayoutDirectionChangedEventCallbackType(IntPtr data, ViewLayoutDirectionType type);
  97
  98         /// <summary>
  99         /// Event when a child is removed.
 100         /// </summary>
 101         /// <since_tizen> 5 </since_tizen>
 102         public new event EventHandler<ChildRemovedEventArgs> ChildRemoved;
 103         /// <summary>
 104         /// Event when a child is added.
 105         /// </summary>
 106         /// <since_tizen> 5 </since_tizen>
 107         public new event EventHandler<ChildAddedEventArgs> ChildAdded;
 108
 109         /// <summary>
 110         /// An event for the KeyInputFocusGained signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 111         /// The KeyInputFocusGained signal is emitted when the control gets the key input focus.<br />
 112         /// </summary>
 113         /// <since_tizen> 3 </since_tizen>
 114         public event EventHandler FocusGained
 115         {
 116             add
 117             {
 118                 if (_keyInputFocusGainedEventHandler == null)
 119                 {
 120                     _keyInputFocusGainedCallback = OnKeyInputFocusGained;
 121                     this.KeyInputFocusGainedSignal().Connect(_keyInputFocusGainedCallback);
 122                 }
 123
 124                 _keyInputFocusGainedEventHandler += value;
 125             }
 126
 127             remove
 128             {
 129                 _keyInputFocusGainedEventHandler -= value;
 130
 131                 if (_keyInputFocusGainedEventHandler == null && KeyInputFocusGainedSignal().Empty() == false)
 132                 {
 133                     this.KeyInputFocusGainedSignal().Disconnect(_keyInputFocusGainedCallback);
 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                     this.KeyInputFocusLostSignal().Connect(_keyInputFocusLostCallback);
 151                 }
 152
 153                 _keyInputFocusLostEventHandler += value;
 154             }
 155
 156             remove
 157             {
 158                 _keyInputFocusLostEventHandler -= value;
 159
 160                 if (_keyInputFocusLostEventHandler == null && KeyInputFocusLostSignal().Empty() == false)
 161                 {
 162                     this.KeyInputFocusLostSignal().Disconnect(_keyInputFocusLostCallback);
 163                 }
 164             }
 165         }
 166
 167         /// <summary>
 168         /// An event for the KeyPressed signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 169         /// The KeyPressed signal is emitted when the key event is received.<br />
 170         /// </summary>
 171         /// <since_tizen> 3 </since_tizen>
 172         public event EventHandlerWithReturnType<object, KeyEventArgs, bool> KeyEvent
 173         {
 174             add
 175             {
 176                 if (_keyEventHandler == null)
 177                 {
 178                     _keyCallback = OnKeyEvent;
 179                     this.KeyEventSignal().Connect(_keyCallback);
 180                 }
 181
 182                 _keyEventHandler += value;
 183             }
 184
 185             remove
 186             {
 187                 _keyEventHandler -= value;
 188
 189                 if (_keyEventHandler == null && KeyEventSignal().Empty() == false)
 190                 {
 191                     this.KeyEventSignal().Disconnect(_keyCallback);
 192                 }
 193             }
 194         }
 195
 196         /// <summary>
 197         /// An event for the OnRelayout signal which can be used to subscribe or unsubscribe the event handler.<br />
 198         /// The OnRelayout signal is emitted after the size has been set on the view during relayout.<br />
 199         /// </summary>
 200         /// <since_tizen> 3 </since_tizen>
 201         public event EventHandler Relayout
 202         {
 203             add
 204             {
 205                 if (_onRelayoutEventHandler == null)
 206                 {
 207                     _onRelayoutEventCallback = OnRelayout;
 208                     this.OnRelayoutSignal().Connect(_onRelayoutEventCallback);
 209                 }
 210
 211                 _onRelayoutEventHandler += value;
 212             }
 213
 214             remove
 215             {
 216                 _onRelayoutEventHandler -= value;
 217
 218                 if (_onRelayoutEventHandler == null && OnRelayoutSignal().Empty() == false)
 219                 {
 220                     this.OnRelayoutSignal().Disconnect(_onRelayoutEventCallback);
 221                     _onRelayoutEventCallback = null;
 222                 }
 223
 224             }
 225         }
 226
 227         /// <summary>
 228         /// An event for the touched signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 229         /// The touched signal is emitted when the touch input is received.<br />
 230         /// This can receive touch events before child. <br />
 231         /// 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 />
 232         /// </summary>
 233         [EditorBrowsable(EditorBrowsableState.Never)]
 234         public event EventHandlerWithReturnType<object, TouchEventArgs, bool> InterceptTouchEvent
 235         {
 236             add
 237             {
 238                 if (_interceptTouchDataEventHandler == null)
 239                 {
 240                     _interceptTouchDataCallback = OnInterceptTouch;
 241                     this.InterceptTouchSignal().Connect(_interceptTouchDataCallback);
 242                 }
 243
 244                 _interceptTouchDataEventHandler += value;
 245             }
 246
 247             remove
 248             {
 249                 _interceptTouchDataEventHandler -= value;
 250
 251                 if (_interceptTouchDataEventHandler == null && InterceptTouchSignal().Empty() == false)
 252                 {
 253                     this.InterceptTouchSignal().Disconnect(_interceptTouchDataCallback);
 254                 }
 255             }
 256         }
 257
 258         /// <summary>
 259         /// If child view doesn't want the parent's view to intercept the touch, you can set it to true.
 260         /// for example :
 261         ///    parent.Add(child);
 262         ///    parent.InterceptTouchEvent += OnInterceptTouchEvent;
 263         ///    View view = child.GetParent() as View;
 264         ///    view.DisallowInterceptTouchEvent = true;
 265         ///  This prevents the parent from interceping touch.
 266         /// </summary>
 267         [EditorBrowsable(EditorBrowsableState.Never)]
 268         public bool DisallowInterceptTouchEvent { get; set; }
 269
 270
 271         /// <summary>
 272         /// An event for the touched signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 273         /// The touched signal is emitted when the touch input is received.<br />
 274         /// </summary>
 275         /// <since_tizen> 3 </since_tizen>
 276         public event EventHandlerWithReturnType<object, TouchEventArgs, bool> TouchEvent
 277         {
 278             add
 279             {
 280                 if (_touchDataEventHandler == null)
 281                 {
 282                     _touchDataCallback = OnTouch;
 283                     this.TouchSignal().Connect(_touchDataCallback);
 284                 }
 285
 286                 _touchDataEventHandler += value;
 287             }
 288
 289             remove
 290             {
 291                 _touchDataEventHandler -= value;
 292
 293                 if (_touchDataEventHandler == null && TouchSignal().Empty() == false)
 294                 {
 295                     this.TouchSignal().Disconnect(_touchDataCallback);
 296                 }
 297             }
 298         }
 299
 300         /// <summary>
 301         /// An event for the hovered signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 302         /// The hovered signal is emitted when the hover input is received.<br />
 303         /// </summary>
 304         /// <since_tizen> 3 </since_tizen>
 305         public event EventHandlerWithReturnType<object, HoverEventArgs, bool> HoverEvent
 306         {
 307             add
 308             {
 309                 if (_hoverEventHandler == null)
 310                 {
 311                     _hoverEventCallback = OnHoverEvent;
 312                     this.HoveredSignal().Connect(_hoverEventCallback);
 313                 }
 314
 315                 _hoverEventHandler += value;
 316             }
 317
 318             remove
 319             {
 320                 _hoverEventHandler -= value;
 321
 322                 if (_hoverEventHandler == null && HoveredSignal().Empty() == false)
 323                 {
 324                     this.HoveredSignal().Disconnect(_hoverEventCallback);
 325                 }
 326
 327             }
 328         }
 329
 330         /// <summary>
 331         /// An event for the WheelMoved signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 332         /// The WheelMoved signal is emitted when the wheel event is received.<br />
 333         /// </summary>
 334         /// <since_tizen> 3 </since_tizen>
 335         public event EventHandlerWithReturnType<object, WheelEventArgs, bool> WheelEvent
 336         {
 337             add
 338             {
 339                 if (_wheelEventHandler == null)
 340                 {
 341                     _wheelEventCallback = OnWheelEvent;
 342                     this.WheelEventSignal().Connect(_wheelEventCallback);
 343                 }
 344                 _wheelEventHandler += value;
 345
 346                 if (WindowWheelEventHandler == null)
 347                 {
 348                     NUIApplication.GetDefaultWindow().WheelEvent += OnWindowWheelEvent;
 349                 }
 350                 WindowWheelEventHandler += value;
 351             }
 352
 353             remove
 354             {
 355                 _wheelEventHandler -= value;
 356                 if (_wheelEventHandler == null && WheelEventSignal().Empty() == false)
 357                 {
 358                     this.WheelEventSignal().Disconnect(_wheelEventCallback);
 359                 }
 360
 361                 WindowWheelEventHandler -= value;
 362                 if (WindowWheelEventHandler == null)
 363                 {
 364                     NUIApplication.GetDefaultWindow().WheelEvent -= OnWindowWheelEvent;
 365                 }
 366             }
 367         }
 368
 369         /// <summary>
 370         /// An event for the OnWindow signal which can be used to subscribe or unsubscribe the event handler.<br />
 371         /// The OnWindow signal is emitted after the view has been connected to the window.<br />
 372         /// </summary>
 373         /// <since_tizen> 3 </since_tizen>
 374         public event EventHandler AddedToWindow
 375         {
 376             add
 377             {
 378                 if (_onWindowEventHandler == null)
 379                 {
 380                     _onWindowEventCallback = OnWindow;
 381                     this.OnWindowSignal().Connect(_onWindowEventCallback);
 382                 }
 383
 384                 _onWindowEventHandler += value;
 385             }
 386
 387             remove
 388             {
 389                 _onWindowEventHandler -= value;
 390
 391                 if (_onWindowEventHandler == null && OnWindowSignal().Empty() == false)
 392                 {
 393                     this.OnWindowSignal().Disconnect(_onWindowEventCallback);
 394                     _onWindowEventCallback = null;
 395                 }
 396             }
 397         }
 398
 399         /// <summary>
 400         /// An event for the OffWindow signal, which can be used to subscribe or unsubscribe the event handler.<br />
 401         /// OffWindow signal is emitted after the view has been disconnected from the window.<br />
 402         /// </summary>
 403         /// <since_tizen> 3 </since_tizen>
 404         public event EventHandler RemovedFromWindow
 405         {
 406             add
 407             {
 408                 if (_offWindowEventHandler == null)
 409                 {
 410                     _offWindowEventCallback = OffWindow;
 411                     this.OffWindowSignal().Connect(_offWindowEventCallback);
 412                 }
 413
 414                 _offWindowEventHandler += value;
 415             }
 416
 417             remove
 418             {
 419                 _offWindowEventHandler -= value;
 420
 421                 if (_offWindowEventHandler == null && OffWindowSignal().Empty() == false)
 422                 {
 423                     this.OffWindowSignal().Disconnect(_offWindowEventCallback);
 424                     _offWindowEventCallback = null;
 425                 }
 426             }
 427         }
 428
 429         /// <summary>
 430         /// An event for visibility change which can be used to subscribe or unsubscribe the event handler.<br />
 431         /// This signal is emitted when the visible property of this or a parent view is changed.<br />
 432         /// </summary>
 433         /// <since_tizen> 3 </since_tizen>
 434         public event EventHandler<VisibilityChangedEventArgs> VisibilityChanged
 435         {
 436             add
 437             {
 438                 if (_visibilityChangedEventHandler == null)
 439                 {
 440                     _visibilityChangedEventCallback = OnVisibilityChanged;
 441                     VisibilityChangedSignal(this).Connect(_visibilityChangedEventCallback);
 442                 }
 443
 444                 _visibilityChangedEventHandler += value;
 445             }
 446
 447             remove
 448             {
 449                 _visibilityChangedEventHandler -= value;
 450
 451                 if (_visibilityChangedEventHandler == null && VisibilityChangedSignal(this).Empty() == false)
 452                 {
 453                     VisibilityChangedSignal(this).Disconnect(_visibilityChangedEventCallback);
 454                 }
 455             }
 456         }
 457
 458         /// <summary>
 459         /// Event for layout direction change which can be used to subscribe/unsubscribe the event handler.<br />
 460         /// This signal is emitted when the layout direction property of this or a parent view is changed.<br />
 461         /// </summary>
 462         /// <since_tizen> 4 </since_tizen>
 463         public event EventHandler<LayoutDirectionChangedEventArgs> LayoutDirectionChanged
 464         {
 465             add
 466             {
 467                 if (_layoutDirectionChangedEventHandler == null)
 468                 {
 469                     _layoutDirectionChangedEventCallback = OnLayoutDirectionChanged;
 470                     LayoutDirectionChangedSignal(this).Connect(_layoutDirectionChangedEventCallback);
 471                 }
 472
 473                 _layoutDirectionChangedEventHandler += value;
 474             }
 475
 476             remove
 477             {
 478                 _layoutDirectionChangedEventHandler -= value;
 479
 480                 if (_layoutDirectionChangedEventHandler == null && LayoutDirectionChangedSignal(this).Empty() == false)
 481                 {
 482                     LayoutDirectionChangedSignal(this).Disconnect(_layoutDirectionChangedEventCallback);
 483                 }
 484             }
 485         }
 486
 487         /// <summary>
 488         /// An event for the ResourcesLoadedSignal signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 489         /// This signal is emitted after all resources required by a view are loaded and ready.<br />
 490         /// </summary>
 491         /// <since_tizen> 3 </since_tizen>
 492         public event EventHandler ResourcesLoaded
 493         {
 494             add
 495             {
 496                 if (_resourcesLoadedEventHandler == null)
 497                 {
 498                     _ResourcesLoadedCallback = OnResourcesLoaded;
 499                     this.ResourcesLoadedSignal().Connect(_ResourcesLoadedCallback);
 500                 }
 501
 502                 _resourcesLoadedEventHandler += value;
 503             }
 504
 505             remove
 506             {
 507                 _resourcesLoadedEventHandler -= value;
 508
 509                 if (_resourcesLoadedEventHandler == null && ResourcesLoadedSignal().Empty() == false)
 510                 {
 511                     this.ResourcesLoadedSignal().Disconnect(_ResourcesLoadedCallback);
 512                     _ResourcesLoadedCallback = null;
 513                 }
 514             }
 515         }
 516
 517         private EventHandler _backKeyPressed;
 518
 519         /// <summary>
 520         /// An event for getting notice when physical back key is pressed.<br />
 521         /// This event is emitted BackKey is up.<br />
 522         /// </summary>
 523         [EditorBrowsable(EditorBrowsableState.Never)]
 524         public event EventHandler BackKeyPressed
 525         {
 526             add
 527             {
 528                 _backKeyPressed += value;
 529                 BackKeyManager.Instance.Subscriber.Add(this);
 530             }
 531
 532             remove
 533             {
 534                 BackKeyManager.Instance.Subscriber.Remove(this);
 535                 _backKeyPressed -= value;
 536             }
 537         }
 538
 539         /// <summary>
 540         /// Function for emitting BackKeyPressed event outside of View instance
 541         /// </summary>
 542         [EditorBrowsable(EditorBrowsableState.Never)]
 543         internal void EmitBackKeyPressed()
 544         {
 545             _backKeyPressed.Invoke(this, null);
 546         }
 547
 548
 549         internal event EventHandler<BackgroundResourceLoadedEventArgs> BackgroundResourceLoaded
 550         {
 551             add
 552             {
 553                 if (_backgroundResourceLoadedEventHandler == null)
 554                 {
 555                     _backgroundResourceLoadedCallback = OnBackgroundResourceLoaded;
 556                     this.ResourcesLoadedSignal().Connect(_backgroundResourceLoadedCallback);
 557                 }
 558
 559                 _backgroundResourceLoadedEventHandler += value;
 560             }
 561             remove
 562             {
 563                 _backgroundResourceLoadedEventHandler -= value;
 564
 565                 if (_backgroundResourceLoadedEventHandler == null && ResourcesLoadedSignal().Empty() == false)
 566                 {
 567                     this.ResourcesLoadedSignal().Disconnect(_backgroundResourceLoadedCallback);
 568                     _backgroundResourceLoadedCallback = null;
 569                 }
 570             }
 571         }
 572
 573         internal TouchDataSignal InterceptTouchSignal()
 574         {
 575             TouchDataSignal ret = new TouchDataSignal(Interop.ActorSignal.Actor_InterceptTouchSignal(swigCPtr), false);
 576             if (NDalicPINVOKE.SWIGPendingException.Pending)
 577                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 578             return ret;
 579         }
 580
 581         internal TouchDataSignal TouchSignal()
 582         {
 583             TouchDataSignal ret = new TouchDataSignal(Interop.ActorSignal.Actor_TouchSignal(swigCPtr), false);
 584             if (NDalicPINVOKE.SWIGPendingException.Pending)
 585                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 586             return ret;
 587         }
 588
 589         internal HoverSignal HoveredSignal()
 590         {
 591             HoverSignal ret = new HoverSignal(Interop.ActorSignal.Actor_HoveredSignal(swigCPtr), false);
 592             if (NDalicPINVOKE.SWIGPendingException.Pending)
 593                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 594             return ret;
 595         }
 596
 597         internal WheelSignal WheelEventSignal()
 598         {
 599             WheelSignal ret = new WheelSignal(Interop.ActorSignal.Actor_WheelEventSignal(swigCPtr), false);
 600             if (NDalicPINVOKE.SWIGPendingException.Pending)
 601                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 602             return ret;
 603         }
 604
 605         internal ViewSignal OnWindowSignal()
 606         {
 607             ViewSignal ret = new ViewSignal(Interop.ActorSignal.Actor_OnSceneSignal(swigCPtr), false);
 608             if (NDalicPINVOKE.SWIGPendingException.Pending)
 609                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 610             return ret;
 611         }
 612
 613         internal ViewSignal OffWindowSignal()
 614         {
 615             ViewSignal ret = new ViewSignal(Interop.ActorSignal.Actor_OffSceneSignal(swigCPtr), false);
 616             if (NDalicPINVOKE.SWIGPendingException.Pending)
 617                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 618             return ret;
 619         }
 620
 621         internal ViewSignal OnRelayoutSignal()
 622         {
 623             ViewSignal ret = new ViewSignal(Interop.ActorSignal.Actor_OnRelayoutSignal(swigCPtr), false);
 624             if (NDalicPINVOKE.SWIGPendingException.Pending)
 625                 throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 626             return ret;
 627         }
 628
 629         internal ViewVisibilityChangedSignal VisibilityChangedSignal(View view)
 630         {
 631             ViewVisibilityChangedSignal ret = new ViewVisibilityChangedSignal(Interop.NDalic.VisibilityChangedSignal(View.getCPtr(view)), false);
 632             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 633             return ret;
 634         }
 635
 636         internal ViewLayoutDirectionChangedSignal LayoutDirectionChangedSignal(View view)
 637         {
 638             ViewLayoutDirectionChangedSignal ret = new ViewLayoutDirectionChangedSignal(Interop.Layout.LayoutDirectionChangedSignal(View.getCPtr(view)), false);
 639             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 640             return ret;
 641         }
 642
 643         internal ViewSignal ResourcesLoadedSignal()
 644         {
 645             ViewSignal ret = new ViewSignal(Interop.View.ResourceReadySignal(swigCPtr), false);
 646             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 647             return ret;
 648         }
 649
 650         internal ControlKeySignal KeyEventSignal()
 651         {
 652             ControlKeySignal ret = new ControlKeySignal(Interop.ViewSignal.View_KeyEventSignal(swigCPtr), false);
 653             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 654             return ret;
 655         }
 656
 657         internal KeyInputFocusSignal KeyInputFocusGainedSignal()
 658         {
 659             KeyInputFocusSignal ret = new KeyInputFocusSignal(Interop.ViewSignal.View_KeyInputFocusGainedSignal(swigCPtr), false);
 660             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 661             return ret;
 662         }
 663
 664         internal KeyInputFocusSignal KeyInputFocusLostSignal()
 665         {
 666             KeyInputFocusSignal ret = new KeyInputFocusSignal(Interop.ViewSignal.View_KeyInputFocusLostSignal(swigCPtr), false);
 667             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 668             return ret;
 669         }
 670
 671         private void OnSize2DChanged(int? width, int? height)
 672         {
 673             if (width != null)
 674             {
 675                 Tizen.NUI.Object.SetProperty(this.swigCPtr, View.Property.SIZE_WIDTH, new Tizen.NUI.PropertyValue((float)width));
 676             }
 677             if (height != null)
 678             {
 679                 Tizen.NUI.Object.SetProperty(this.swigCPtr, View.Property.SIZE_HEIGHT, new Tizen.NUI.PropertyValue((float)height));
 680             }
 681         }
 682
 683         private void OnMinimumSizeChanged(int? width, int? height)
 684         {
 685             if (width != null && height != null)
 686             {
 687                 MinimumSize = new Size2D((int)width, (int)height);
 688             }
 689             else if (width != null && height == null)
 690             {
 691                 MinimumSize = new Size2D((int)width, (int)this.GetMinimumSize().Height);
 692             }
 693             else if (width == null && height != null)
 694             {
 695                 MinimumSize = new Size2D((int)this.GetMinimumSize().Width, (int)height);
 696             }
 697             else
 698             {
 699                 //both are null, do nothing.
 700             }
 701         }
 702
 703         private void OnMaximumSizeChanged(int? width, int? height)
 704         {
 705             if (width != null && height != null)
 706             {
 707                 MaximumSize = new Size2D((int)width, (int)height);
 708             }
 709             else if (width != null && height == null)
 710             {
 711                 MaximumSize = new Size2D((int)width, (int)this.GetMaximumSize().Height);
 712             }
 713             else if (width == null && height != null)
 714             {
 715                 MaximumSize = new Size2D((int)this.GetMaximumSize().Width, (int)height);
 716             }
 717             else
 718             {
 719                 //both are null, do nothing.
 720             }
 721         }
 722
 723         private void OnPosition2DChanged(int x, int y)
 724         {
 725             Position2D = new Position2D(x, y);
 726         }
 727
 728         private void OnSizeChanged(float? width, float? height, float? depth)
 729         {
 730             if (width != null)
 731             {
 732                 Tizen.NUI.Object.SetProperty(this.swigCPtr, View.Property.SIZE_WIDTH, new Tizen.NUI.PropertyValue((float)width));
 733             }
 734             if (height != null)
 735             {
 736                 Tizen.NUI.Object.SetProperty(this.swigCPtr, View.Property.SIZE_HEIGHT, new Tizen.NUI.PropertyValue((float)height));
 737             }
 738             if (depth != null)
 739             {
 740                 Tizen.NUI.Object.SetProperty(this.swigCPtr, View.Property.SIZE_DEPTH, new Tizen.NUI.PropertyValue((float)depth));
 741             }
 742         }
 743
 744         private void OnPositionChanged(float x, float y, float z)
 745         {
 746             Position = new Position(x, y, z);
 747         }
 748
 749         private void OnParentOriginChanged(float x, float y, float z)
 750         {
 751             ParentOrigin = new Position(x, y, z);
 752         }
 753
 754         private void OnPivotPointChanged(float x, float y, float z)
 755         {
 756             PivotPoint = new Position(x, y, z);
 757         }
 758
 759         private void OnImageShadowChanged(ShadowBase instance)
 760         {
 761             ImageShadow = (ImageShadow)instance;
 762         }
 763
 764         private void OnBoxShadowChanged(ShadowBase instance)
 765         {
 766             BoxShadow = (Shadow)instance;
 767         }
 768
 769         private void OnBackgroundImageBorderChanged(int left, int right, int bottom, int top)
 770         {
 771             BackgroundImageBorder = new Rectangle(left, right, bottom, top);
 772         }
 773
 774         private void OnKeyInputFocusGained(IntPtr view)
 775         {
 776             if (_keyInputFocusGainedEventHandler != null)
 777             {
 778                 _keyInputFocusGainedEventHandler(this, null);
 779             }
 780         }
 781
 782         private void OnKeyInputFocusLost(IntPtr view)
 783         {
 784             if (_keyInputFocusLostEventHandler != null)
 785             {
 786                 _keyInputFocusLostEventHandler(this, null);
 787             }
 788         }
 789
 790         private bool OnKeyEvent(IntPtr view, IntPtr keyEvent)
 791         {
 792             if (keyEvent == global::System.IntPtr.Zero)
 793             {
 794                 NUILog.Error("keyEvent should not be null!");
 795                 return true;
 796             }
 797
 798             KeyEventArgs e = new KeyEventArgs();
 799
 800             bool result = false;
 801
 802             e.Key = Tizen.NUI.Key.GetKeyFromPtr(keyEvent);
 803
 804             if (_keyEventHandler != null)
 805             {
 806                 Delegate[] delegateList = _keyEventHandler.GetInvocationList();
 807
 808                 // Oring the result of each callback.
 809                 foreach (EventHandlerWithReturnType<object, KeyEventArgs, bool> del in delegateList)
 810                 {
 811                     result |= del(this, e);
 812                 }
 813             }
 814
 815             return result;
 816         }
 817
 818         // Callback for View OnRelayout signal
 819         private void OnRelayout(IntPtr data)
 820         {
 821             if (_onRelayoutEventHandler != null)
 822             {
 823                 _onRelayoutEventHandler(this, null);
 824             }
 825         }
 826
 827         // Callback for View TouchSignal
 828         private bool OnInterceptTouch(IntPtr view, IntPtr touchData)
 829         {
 830             if (touchData == global::System.IntPtr.Zero)
 831             {
 832                 NUILog.Error("touchData should not be null!");
 833                 return true;
 834             }
 835
 836             // DisallowInterceptTouchEvent prevents the parent from intercepting touch.
 837             if (DisallowInterceptTouchEvent)
 838             {
 839                 return false;
 840             }
 841
 842             TouchEventArgs e = new TouchEventArgs();
 843
 844             e.Touch = Tizen.NUI.Touch.GetTouchFromPtr(touchData);
 845
 846             bool consumed = false;
 847
 848             if (_interceptTouchDataEventHandler != null)
 849             {
 850                 consumed = _interceptTouchDataEventHandler(this, e);
 851             }
 852
 853             return consumed;
 854         }
 855
 856         // Callback for View TouchSignal
 857         private bool OnTouch(IntPtr view, IntPtr touchData)
 858         {
 859             if (touchData == global::System.IntPtr.Zero)
 860             {
 861                 NUILog.Error("touchData should not be null!");
 862                 return true;
 863             }
 864
 865             TouchEventArgs e = new TouchEventArgs();
 866
 867             e.Touch = Tizen.NUI.Touch.GetTouchFromPtr(touchData);
 868
 869             bool consumed = false;
 870
 871             if (_touchDataEventHandler != null)
 872             {
 873                 consumed = _touchDataEventHandler(this, e);
 874             }
 875
 876             if (enableControlState && !consumed)
 877             {
 878                 consumed = HandleControlStateOnTouch(e.Touch);
 879             }
 880
 881             return consumed;
 882         }
 883
 884         // Callback for View Hover signal
 885         private bool OnHoverEvent(IntPtr view, IntPtr hoverEvent)
 886         {
 887             if (hoverEvent == global::System.IntPtr.Zero)
 888             {
 889                 NUILog.Error("hoverEvent should not be null!");
 890                 return true;
 891             }
 892
 893             HoverEventArgs e = new HoverEventArgs();
 894
 895             e.Hover = Tizen.NUI.Hover.GetHoverFromPtr(hoverEvent);
 896
 897             if (_hoverEventHandler != null)
 898             {
 899                 return _hoverEventHandler(this, e);
 900             }
 901             return false;
 902         }
 903
 904         // Callback for View Wheel signal
 905         private bool OnWheelEvent(IntPtr view, IntPtr wheelEvent)
 906         {
 907             if (wheelEvent == global::System.IntPtr.Zero)
 908             {
 909                 NUILog.Error("wheelEvent should not be null!");
 910                 return true;
 911             }
 912
 913             WheelEventArgs e = new WheelEventArgs();
 914
 915             e.Wheel = Tizen.NUI.Wheel.GetWheelFromPtr(wheelEvent);
 916
 917             if (_wheelEventHandler != null)
 918             {
 919                 return _wheelEventHandler(this, e);
 920             }
 921             return false;
 922         }
 923
 924         // Callback for View OnWindow signal
 925         private void OnWindow(IntPtr data)
 926         {
 927             if (_onWindowEventHandler != null)
 928             {
 929                 _onWindowEventHandler(this, null);
 930             }
 931         }
 932
 933         // Callback for View OffWindow signal
 934         private void OffWindow(IntPtr data)
 935         {
 936             if (_offWindowEventHandler != null)
 937             {
 938                 _offWindowEventHandler(this, null);
 939             }
 940         }
 941
 942         // Callback for View visibility change signal
 943         private void OnVisibilityChanged(IntPtr data, bool visibility, VisibilityChangeType type)
 944         {
 945             VisibilityChangedEventArgs e = new VisibilityChangedEventArgs();
 946             if (data != null)
 947             {
 948                 e.View = Registry.GetManagedBaseHandleFromNativePtr(data) as View;
 949             }
 950             e.Visibility = visibility;
 951             e.Type = type;
 952
 953             if (_visibilityChangedEventHandler != null)
 954             {
 955                 _visibilityChangedEventHandler(this, e);
 956             }
 957         }
 958
 959         // Callback for View layout direction change signal
 960         private void OnLayoutDirectionChanged(IntPtr data, ViewLayoutDirectionType type)
 961         {
 962             LayoutDirectionChangedEventArgs e = new LayoutDirectionChangedEventArgs();
 963             if (data != null)
 964             {
 965                 e.View = Registry.GetManagedBaseHandleFromNativePtr(data) as View;
 966             }
 967             e.Type = type;
 968
 969             if (_layoutDirectionChangedEventHandler != null)
 970             {
 971                 _layoutDirectionChangedEventHandler(this, e);
 972             }
 973         }
 974
 975         private void OnResourcesLoaded(IntPtr view)
 976         {
 977             if (_resourcesLoadedEventHandler != null)
 978             {
 979                 _resourcesLoadedEventHandler(this, null);
 980             }
 981         }
 982
 983         private void OnBackgroundResourceLoaded(IntPtr view)
 984         {
 985             BackgroundResourceLoadedEventArgs e = new BackgroundResourceLoadedEventArgs();
 986             e.Status = (ResourceLoadingStatusType)Interop.View.View_GetVisualResourceStatus(this.swigCPtr, Property.BACKGROUND);
 987
 988             if (_backgroundResourceLoadedEventHandler != null)
 989             {
 990                 _backgroundResourceLoadedEventHandler(this, e);
 991             }
 992         }
 993
 994         /// <summary>
 995         /// Event argument passed through the ChildAdded event.
 996         /// </summary>
 997         /// <since_tizen> 5 </since_tizen>
 998         public class ChildAddedEventArgs : EventArgs
 999         {
1000             /// <summary>
1001             /// Added child view at moment.
1002             /// </summary>
1003             /// <since_tizen> 5 </since_tizen>
1004             public View Added { get; set; }
1005         }
1006
1007         /// <summary>
1008         /// Event argument passed through the ChildRemoved event.
1009         /// </summary>
1010         /// <since_tizen> 5 </since_tizen>
1011         public class ChildRemovedEventArgs : EventArgs
1012         {
1013             /// <summary>
1014             /// Removed child view at moment.
1015             /// </summary>
1016             /// <since_tizen> 5 </since_tizen>
1017             public View Removed { get; set; }
1018         }
1019
1020         /// <summary>
1021         /// Event arguments that passed via the KeyEvent signal.
1022         /// </summary>
1023         /// <since_tizen> 3 </since_tizen>
1024         public class KeyEventArgs : EventArgs
1025         {
1026             private Key _key;
1027
1028             /// <summary>
1029             /// Key - is the key sent to the view.
1030             /// </summary>
1031             /// <since_tizen> 3 </since_tizen>
1032             public Key Key
1033             {
1034                 get
1035                 {
1036                     return _key;
1037                 }
1038                 set
1039                 {
1040                     _key = value;
1041                 }
1042             }
1043         }
1044
1045         /// <summary>
1046         /// Event arguments that passed via the touch signal.
1047         /// </summary>
1048         /// <since_tizen> 3 </since_tizen>
1049         public class TouchEventArgs : EventArgs
1050         {
1051             private Touch _touch;
1052
1053             /// <summary>
1054             /// Touch - contains the information of touch points.
1055             /// </summary>
1056             /// <since_tizen> 3 </since_tizen>
1057             public Touch Touch
1058             {
1059                 get
1060                 {
1061                     return _touch;
1062                 }
1063                 set
1064                 {
1065                     _touch = value;
1066                 }
1067             }
1068         }
1069
1070         /// <summary>
1071         /// Event arguments that passed via the hover signal.
1072         /// </summary>
1073         /// <since_tizen> 3 </since_tizen>
1074         public class HoverEventArgs : EventArgs
1075         {
1076             private Hover _hover;
1077
1078             /// <summary>
1079             /// Hover - contains touch points that represent the points that are currently being hovered or the points where a hover has stopped.
1080             /// </summary>
1081             /// <since_tizen> 3 </since_tizen>
1082             public Hover Hover
1083             {
1084                 get
1085                 {
1086                     return _hover;
1087                 }
1088                 set
1089                 {
1090                     _hover = value;
1091                 }
1092             }
1093         }
1094
1095         /// <summary>
1096         /// Event arguments that passed via the wheel signal.
1097         /// </summary>
1098         /// <since_tizen> 3 </since_tizen>
1099         public class WheelEventArgs : EventArgs
1100         {
1101             private Wheel _wheel;
1102
1103             /// <summary>
1104             /// WheelEvent - store a wheel rolling type: MOUSE_WHEEL or CUSTOM_WHEEL.
1105             /// </summary>
1106             /// <since_tizen> 3 </since_tizen>
1107             public Wheel Wheel
1108             {
1109                 get
1110                 {
1111                     return _wheel;
1112                 }
1113                 set
1114                 {
1115                     _wheel = value;
1116                 }
1117             }
1118         }
1119
1120         /// <summary>
1121         /// Event arguments of visibility changed.
1122         /// </summary>
1123         /// <since_tizen> 3 </since_tizen>
1124         public class VisibilityChangedEventArgs : EventArgs
1125         {
1126             private View _view;
1127             private bool _visibility;
1128             private VisibilityChangeType _type;
1129
1130             /// <summary>
1131             /// The view, or child of view, whose visibility has changed.
1132             /// </summary>
1133             /// <since_tizen> 3 </since_tizen>
1134             public View View
1135             {
1136                 get
1137                 {
1138                     return _view;
1139                 }
1140                 set
1141                 {
1142                     _view = value;
1143                 }
1144             }
1145
1146             /// <summary>
1147             /// Whether the view is now visible or not.
1148             /// </summary>
1149             /// <since_tizen> 3 </since_tizen>
1150             public bool Visibility
1151             {
1152                 get
1153                 {
1154                     return _visibility;
1155                 }
1156                 set
1157                 {
1158                     _visibility = value;
1159                 }
1160             }
1161
1162             /// <summary>
1163             /// Whether the view's visible property has changed or a parent's.
1164             /// </summary>
1165             /// <since_tizen> 3 </since_tizen>
1166             public VisibilityChangeType Type
1167             {
1168                 get
1169                 {
1170                     return _type;
1171                 }
1172                 set
1173                 {
1174                     _type = value;
1175                 }
1176             }
1177         }
1178
1179         /// <summary>
1180         /// Event arguments of layout direction changed.
1181         /// </summary>
1182         /// <since_tizen> 4 </since_tizen>
1183         public class LayoutDirectionChangedEventArgs : EventArgs
1184         {
1185             private View _view;
1186             private ViewLayoutDirectionType _type;
1187
1188             /// <summary>
1189             /// The view, or child of view, whose layout direction has changed.
1190             /// </summary>
1191             /// <since_tizen> 4 </since_tizen>
1192             public View View
1193             {
1194                 get
1195                 {
1196                     return _view;
1197                 }
1198                 set
1199                 {
1200                     _view = value;
1201                 }
1202             }
1203
1204             /// <summary>
1205             /// Whether the view's layout direction property has changed or a parent's.
1206             /// </summary>
1207             /// <since_tizen> 4 </since_tizen>
1208             public ViewLayoutDirectionType Type
1209             {
1210                 get
1211                 {
1212                     return _type;
1213                 }
1214                 set
1215                 {
1216                     _type = value;
1217                 }
1218             }
1219         }
1220
1221         internal class BackgroundResourceLoadedEventArgs : EventArgs
1222         {
1223             private ResourceLoadingStatusType status = ResourceLoadingStatusType.Invalid;
1224             public ResourceLoadingStatusType Status
1225             {
1226                 get
1227                 {
1228                     return status;
1229                 }
1230                 set
1231                 {
1232                     status = value;
1233                 }
1234             }
1235         }
1236
1237         /// <summary>
1238         /// The class represents the information of the situation where the View's control state changes.
1239         /// </summary>
1240         [EditorBrowsable(EditorBrowsableState.Never)]
1241         public class ControlStateChangedEventArgs : EventArgs
1242         {
1243             /// <summary>
1244             /// Create an instance with mandatory fields.
1245             /// </summary>
1246             /// <param name="previousState">The previous control state.</param>
1247             /// <param name="currentState">The current control state.</param>
1248             [EditorBrowsable(EditorBrowsableState.Never)]
1249             public ControlStateChangedEventArgs(ControlState previousState, ControlState currentState)
1250             {
1251                 PreviousState = previousState;
1252                 CurrentState = currentState;
1253             }
1254
1255             /// <summary>
1256             /// The previous control state.
1257             /// </summary>
1258             [EditorBrowsable(EditorBrowsableState.Never)]
1259             public ControlState PreviousState { get; }
1260
1261             /// <summary>
1262             /// The current control state.
1263             /// </summary>
1264             [EditorBrowsable(EditorBrowsableState.Never)]
1265             public ControlState CurrentState { get; }
1266         }
1267
1268         private EventHandlerWithReturnType<object, WheelEventArgs, bool> WindowWheelEventHandler;
1269         private void OnWindowWheelEvent(object sender, Window.WheelEventArgs e)
1270         {
1271             if (e != null)
1272             {
1273                 if (e.Wheel.Type == Wheel.WheelType.CustomWheel)
1274                 {
1275                     var arg = new WheelEventArgs()
1276                     {
1277                         Wheel = e.Wheel,
1278                     };
1279                     WindowWheelEventHandler?.Invoke(this, arg);
1280                 }
1281             }
1282         }
1283
1284     }
1285 }