src/Tizen.NUI/src/public/FocusManager.cs

   1 /*
   2  * Copyright(c) 2019 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 using System;
  19 using System.Runtime.InteropServices;
  20 using Tizen.NUI.BaseComponents;
  21 using System.ComponentModel;
  22
  23 namespace Tizen.NUI
  24 {
  25     /// <summary>
  26     /// Provides the functionality of handling keyboard navigation and maintaining the two-dimensional keyboard focus chain.<br />
  27     /// It provides functionality of setting the focus and moving the focus in four directions( i.e., left, right, up, and down).<br />
  28     /// It also draws a highlight for the focused view and sends an event when the focus is changed.<br />
  29     /// </summary>
  30     /// <since_tizen> 3 </since_tizen>
  31     public class FocusManager : BaseHandle
  32     {
  33         private static readonly FocusManager instance = FocusManager.Get();
  34         private global::System.Runtime.InteropServices.HandleRef swigCPtr;
  35         private CustomAlgorithmInterfaceWrapper _customAlgorithmInterfaceWrapper;
  36
  37         private EventHandlerWithReturnType<object, PreFocusChangeEventArgs, View> _preFocusChangeEventHandler;
  38         private PreFocusChangeEventCallback _preFocusChangeCallback;
  39
  40         private EventHandler<FocusChangedEventArgs> _focusChangedEventHandler;
  41         private FocusChangedEventCallback _focusChangedEventCallback;
  42
  43         private EventHandler<FocusGroupChangedEventArgs> _focusGroupChangedEventHandler;
  44         private FocusGroupChangedEventCallback _focusGroupChangedEventCallback;
  45
  46         private EventHandler<FocusedViewActivatedEventArgs> _focusedViewEnterKeyEventHandler;
  47         private FocusedViewEnterKeyEventCallback _focusedViewEnterKeyEventCallback;
  48
  49         private EventHandler<FocusedViewActivatedEventArgs> _focusedViewEnterKeyEventHandler2;
  50         private FocusedViewEnterKeyEventCallback2 _focusedViewEnterKeyEventCallback2;
  51
  52         internal FocusManager(global::System.IntPtr cPtr, bool cMemoryOwn) : base(Interop.FocusManager.FocusManager_SWIGUpcast(cPtr), cMemoryOwn)
  53         {
  54             swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
  55         }
  56
  57         internal FocusManager() : this(Interop.FocusManager.new_FocusManager(), true)
  58         {
  59             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
  60         }
  61
  62         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  63         internal delegate IntPtr PreFocusChangeEventCallback(IntPtr current, IntPtr proposed, View.FocusDirection direction);
  64
  65         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  66         internal delegate void FocusChangedEventCallback(IntPtr current, IntPtr next);
  67
  68         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  69         private delegate void FocusGroupChangedEventCallback(IntPtr current, bool forwardDirection);
  70
  71         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  72         private delegate void FocusedViewEnterKeyEventCallback(IntPtr view);
  73
  74         [UnmanagedFunctionPointer(CallingConvention.StdCall)]
  75         private delegate void FocusedViewEnterKeyEventCallback2(IntPtr view);
  76
  77         /// <summary>
  78         /// PreFocusChange will be triggered before the focus is going to be changed.<br />
  79         /// The FocusManager makes the best guess for which view to focus towards the given direction, but applications might want to change that.<br />
  80         /// By connecting with this event, they can check the proposed view to focus and return a different view if they wish.<br />
  81         /// This event is only triggered when the navigation key is pressed and KeyboardFocusManager tries to move the focus automatically.<br />
  82         /// It won't be emitted for focus movement by calling the SetCurrentFocusView directly.<br />
  83         /// </summary>
  84         /// <since_tizen> 3 </since_tizen>
  85         public event EventHandlerWithReturnType<object, PreFocusChangeEventArgs, View> PreFocusChange
  86         {
  87             add
  88             {
  89                 if (_preFocusChangeEventHandler == null)
  90                 {
  91                     _preFocusChangeCallback = OnPreFocusChange;
  92                     PreFocusChangeSignal().Connect(_preFocusChangeCallback);
  93                 }
  94                 _preFocusChangeEventHandler += value;
  95             }
  96             remove
  97             {
  98                 _preFocusChangeEventHandler -= value;
  99                 if (_preFocusChangeEventHandler == null && PreFocusChangeSignal().Empty() == false)
 100                 {
 101                     PreFocusChangeSignal().Disconnect(_preFocusChangeCallback);
 102                 }
 103             }
 104         }
 105
 106         /// <summary>
 107         /// The FocusGroupChanged will be triggered after the current focused view has been changed.
 108         /// </summary>
 109         /// <since_tizen> 3 </since_tizen>
 110         public event EventHandler<FocusChangedEventArgs> FocusChanged
 111         {
 112             add
 113             {
 114                 if (_focusChangedEventCallback == null)
 115                 {
 116                     _focusChangedEventCallback = OnFocusChanged;
 117                     FocusChangedSignal().Connect(_focusChangedEventCallback);
 118                 }
 119                 _focusChangedEventHandler += value;
 120             }
 121             remove
 122             {
 123                 _focusChangedEventHandler -= value;
 124
 125                 if (_focusChangedEventCallback == null && FocusChangedSignal().Empty() == false)
 126                 {
 127                     FocusChangedSignal().Disconnect(_focusChangedEventCallback);
 128                 }
 129             }
 130         }
 131
 132         /// <summary>
 133         /// The FocusGroupChanged will be triggered when the focus group has been changed.<br />
 134         /// If the current focus group has a parent layout control, the FocusManager will make the best guess for the next focus group to move the focus to in the given direction (forward or backward).<br />
 135         /// If not, the application has to set the new focus.<br />
 136         /// </summary>
 137         /// <since_tizen> 3 </since_tizen>
 138         public event EventHandler<FocusGroupChangedEventArgs> FocusGroupChanged
 139         {
 140             add
 141             {
 142                 if (_focusGroupChangedEventCallback == null)
 143                 {
 144                     _focusGroupChangedEventCallback = OnFocusGroupChanged;
 145                     FocusGroupChangedSignal().Connect(_focusGroupChangedEventCallback);
 146                 }
 147                 _focusGroupChangedEventHandler += value;
 148             }
 149             remove
 150             {
 151                 _focusGroupChangedEventHandler -= value;
 152
 153                 if (_focusGroupChangedEventCallback == null && FocusGroupChangedSignal().Empty() == false)
 154                 {
 155                     FocusGroupChangedSignal().Disconnect(_focusGroupChangedEventCallback);
 156                 }
 157             }
 158         }
 159
 160         /// <summary>
 161         /// The FocusedViewActivated will be triggered when the current focused view has the enter key pressed on it.
 162         /// </summary>
 163         /// <since_tizen> 3 </since_tizen>
 164         public event EventHandler<FocusedViewActivatedEventArgs> FocusedViewActivated
 165         {
 166             add
 167             {
 168                 if (_focusedViewEnterKeyEventCallback == null)
 169                 {
 170                     _focusedViewEnterKeyEventCallback = OnFocusedViewEnterKey;
 171                     FocusedViewEnterKeySignal().Connect(_focusedViewEnterKeyEventCallback);
 172                 }
 173                 _focusedViewEnterKeyEventHandler += value;
 174             }
 175             remove
 176             {
 177                 _focusedViewEnterKeyEventHandler -= value;
 178
 179                 if (_focusedViewEnterKeyEventCallback != null && FocusedViewEnterKeySignal().Empty() == false)
 180                 {
 181                     FocusedViewEnterKeySignal().Disconnect(_focusedViewEnterKeyEventCallback);
 182                 }
 183             }
 184         }
 185
 186         /// <summary>
 187         /// [Obsolete("Please do not use! this will be deprecated")]
 188         /// </summary>
 189         /// <since_tizen> 3 </since_tizen>
 190         /// Please do not use! this will be deprecated!
 191         /// Instead please use FocusedViewActivated.
 192         [Obsolete("Please do not use! This will be deprecated! Please use FocusManager.FocusedViewActivated instead! " +
 193             "Like: " +
 194             "FocusManager.Instance.FocusedViewActivated = OnFocusedViewActivated; " +
 195             "private void OnFocusedViewActivated(object source, FocusManager.FocusedViewActivatedEventArgs args) {...}")]
 196         [EditorBrowsable(EditorBrowsableState.Never)]
 197         public event EventHandler<FocusedViewActivatedEventArgs> FocusedViewEnterKeyPressed
 198         {
 199             add
 200             {
 201                 if (_focusedViewEnterKeyEventCallback2 == null)
 202                 {
 203                     _focusedViewEnterKeyEventCallback2 = OnFocusedViewEnterKey2;
 204                     FocusedViewEnterKeySignal().Connect(_focusedViewEnterKeyEventCallback2);
 205                 }
 206                 _focusedViewEnterKeyEventHandler2 += value;
 207             }
 208             remove
 209             {
 210                 _focusedViewEnterKeyEventHandler2 -= value;
 211
 212                 if (_focusedViewEnterKeyEventCallback2 != null && FocusedViewEnterKeySignal().Empty() == false)
 213                 {
 214                     FocusedViewEnterKeySignal().Disconnect(_focusedViewEnterKeyEventCallback2);
 215                 }
 216             }
 217         }
 218
 219         /// <summary>
 220         /// ICustomFocusAlgorithm is used to provide the custom keyboard focus algorithm for retrieving the next focusable view.<br />
 221         /// The application can implement the interface and override the keyboard focus behavior.<br />
 222         /// If the focus is changing within a layout container, then the layout container is queried first to provide the next focusable view.<br />
 223         /// If this does not provide a valid view, then the Keyboard FocusManager will check focusable properties to determine the next focusable actor.<br />
 224         /// If focusable properties are not set, then the keyboard FocusManager calls the GetNextFocusableView() method of this interface.<br />
 225         /// </summary>
 226         /// <since_tizen> 3 </since_tizen>
 227         public interface ICustomFocusAlgorithm
 228         {
 229             /// <summary>
 230             /// Get the next focus actor.
 231             /// </summary>
 232             /// <param name="current">The current focus view.</param>
 233             /// <param name="proposed">The proposed focus view</param>
 234             /// <param name="direction">The focus move direction</param>
 235             /// <returns>The next focus actor.</returns>
 236             /// <since_tizen> 3 </since_tizen>
 237             View GetNextFocusableView(View current, View proposed, View.FocusDirection direction);
 238         }
 239
 240         /// <summary>
 241         /// Gets or sets the status of whether the focus movement should be looped within the same focus group.<br />
 242         /// The focus movement is not looped by default.<br />
 243         /// </summary>
 244         /// <since_tizen> 3 </since_tizen>
 245         public bool FocusGroupLoop
 246         {
 247             set
 248             {
 249                 SetFocusGroupLoop(value);
 250             }
 251             get
 252             {
 253                 return GetFocusGroupLoop();
 254             }
 255         }
 256
 257         /// <summary>
 258         /// Gets or sets the focus indicator view.<br />
 259         /// This will replace the default focus indicator view in the FocusManager and will be added to the focused view as a highlight.<br />
 260         /// </summary>
 261         /// <since_tizen> 3 </since_tizen>
 262         public View FocusIndicator
 263         {
 264             set
 265             {
 266                 SetFocusIndicatorView(value);
 267             }
 268             get
 269             {
 270                 return GetFocusIndicatorView();
 271             }
 272         }
 273
 274         /// <summary>
 275         /// Gets the singleton of the FocusManager object.
 276         /// </summary>
 277         /// <since_tizen> 3 </since_tizen>
 278         public static FocusManager Instance
 279         {
 280             get
 281             {
 282                 return instance;
 283             }
 284         }
 285
 286         /// <summary>
 287         /// Moves the keyboard focus to the given view.<br />
 288         /// Only one view can be focused at the same time.<br />
 289         /// The view must be in the stage already and keyboard focusable.<br />
 290         /// </summary>
 291         /// <param name="view">The view to be focused.</param>
 292         /// <returns>Whether the focus is successful or not.</returns>
 293         /// <since_tizen> 3 </since_tizen>
 294         public bool SetCurrentFocusView(View view)
 295         {
 296             if (view == null)
 297             {
 298                 throw new ArgumentNullException("the target view should not be null");
 299             }
 300
 301             bool ret = Interop.FocusManager.FocusManager_SetCurrentFocusActor(swigCPtr, View.getCPtr(view));
 302             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 303             return ret;
 304         }
 305
 306         /// <summary>
 307         /// Gets the current focused view.
 308         /// </summary>
 309         /// <returns>A handle to the current focused view or an empty handle if no view is focused.</returns>
 310         /// <since_tizen> 3 </since_tizen>
 311         public View GetCurrentFocusView()
 312         {
 313             //to fix memory leak issue, match the handle count with native side.
 314             IntPtr cPtr = Interop.FocusManager.FocusManager_GetCurrentFocusActor(swigCPtr);
 315             View ret = this.GetInstanceSafely<View>(cPtr);
 316             return ret;
 317         }
 318
 319         /// <summary>
 320         /// Moves the focus to the next focusable view in the focus chain in the given direction (according to the focus traversal order).
 321         /// </summary>
 322         /// <param name="direction">The direction of the focus movement.</param>
 323         /// <returns>True if the movement was successful.</returns>
 324         /// <since_tizen> 3 </since_tizen>
 325         public bool MoveFocus(View.FocusDirection direction)
 326         {
 327             bool ret = Interop.FocusManager.FocusManager_MoveFocus(swigCPtr, (int)direction);
 328             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 329             return ret;
 330         }
 331
 332         /// <summary>
 333         /// Clears the focus from the current focused view if any, so that no view is focused in the focus chain.<br />
 334         /// It will emit the FocusChanged event without the current focused view.<br />
 335         /// </summary>
 336         /// <since_tizen> 3 </since_tizen>
 337         public void ClearFocus()
 338         {
 339             Interop.FocusManager.FocusManager_ClearFocus(swigCPtr);
 340             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 341         }
 342
 343         /// <summary>
 344         /// Move the focus to previous focused view.
 345         /// </summary>
 346         /// <since_tizen> 3 </since_tizen>
 347         public void MoveFocusBackward()
 348         {
 349             Interop.FocusManager.FocusManager_MoveFocusBackward(swigCPtr);
 350             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 351         }
 352
 353         /// <summary>
 354         /// Sets whether the view is a focus group that can limit the scope of the focus movement to its child views in the focus chain.<br />
 355         /// Layout controls set themselves as focus groups by default.<br />
 356         /// </summary>
 357         /// <param name="view">The view to be set as a focus group.</param>
 358         /// <param name="isFocusGroup">Whether to set the view as a focus group or not.</param>
 359         /// <since_tizen> 3 </since_tizen>
 360         public void SetAsFocusGroup(View view, bool isFocusGroup)
 361         {
 362             Interop.FocusManager.FocusManager_SetAsFocusGroup(swigCPtr, View.getCPtr(view), isFocusGroup);
 363             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 364         }
 365
 366         /// <summary>
 367         /// Checks whether the view is set as a focus group or not.
 368         /// </summary>
 369         /// <param name="view">The view to be checked.</param>
 370         /// <returns>Whether the view is set as a focus group.</returns>
 371         /// <since_tizen> 3 </since_tizen>
 372         public bool IsFocusGroup(View view)
 373         {
 374             bool ret = Interop.FocusManager.FocusManager_IsFocusGroup(swigCPtr, View.getCPtr(view));
 375             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 376             return ret;
 377         }
 378
 379         /// <summary>
 380         /// Returns the closest ancestor of the given view that is a focus group.
 381         /// </summary>
 382         /// <param name="view">The view to be checked for its focus group.</param>
 383         /// <returns>The focus group the given view belongs to or an empty handle if the given view.</returns>
 384         /// <since_tizen> 3 </since_tizen>
 385         public View GetFocusGroup(View view)
 386         {
 387             //to fix memory leak issue, match the handle count with native side.
 388             IntPtr cPtr = Interop.FocusManager.FocusManager_GetFocusGroup(swigCPtr, View.getCPtr(view));
 389             View ret = this.GetInstanceSafely<View>(cPtr);
 390             return ret;
 391         }
 392
 393         /// <summary>
 394         /// Provides the implementation of a custom focus algorithm interface to allow the application to define the focus logic.<br />
 395         /// </summary>
 396         /// <param name="arg0">The user's implementation of ICustomFocusAlgorithm.</param>
 397         /// <since_tizen> 3 </since_tizen>
 398         public void SetCustomAlgorithm(ICustomFocusAlgorithm arg0)
 399         {
 400             if(arg0 != null)
 401             {
 402                 _customAlgorithmInterfaceWrapper = new CustomAlgorithmInterfaceWrapper();
 403                 _customAlgorithmInterfaceWrapper.SetFocusAlgorithm(arg0);
 404
 405                 Interop.NDalic.SetCustomAlgorithm(swigCPtr, CustomAlgorithmInterface.getCPtr(_customAlgorithmInterfaceWrapper));
 406                 if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 407             }
 408             else
 409             {
 410                 Interop.NDalic.SetCustomAlgorithm(swigCPtr, new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero));
 411                 if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 412             }
 413         }
 414
 415         internal static global::System.Runtime.InteropServices.HandleRef getCPtr(FocusManager obj)
 416         {
 417             return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr;
 418         }
 419
 420         internal static FocusManager Get()
 421         {
 422             FocusManager ret = new FocusManager(Interop.FocusManager.FocusManager_Get(), true);
 423             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 424             return ret;
 425         }
 426
 427         internal void SetFocusGroupLoop(bool enabled)
 428         {
 429             Interop.FocusManager.FocusManager_SetFocusGroupLoop(swigCPtr, enabled);
 430             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 431         }
 432
 433         internal bool GetFocusGroupLoop()
 434         {
 435             bool ret = Interop.FocusManager.FocusManager_GetFocusGroupLoop(swigCPtr);
 436             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 437             return ret;
 438         }
 439
 440         internal void SetFocusIndicatorView(View indicator)
 441         {
 442             Interop.FocusManager.FocusManager_SetFocusIndicatorActor(swigCPtr, View.getCPtr(indicator));
 443             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 444         }
 445
 446         internal View GetFocusIndicatorView()
 447         {
 448             //to fix memory leak issue, match the handle count with native side.
 449             IntPtr cPtr = Interop.FocusManager.FocusManager_GetFocusIndicatorActor(swigCPtr);
 450             View ret = this.GetInstanceSafely<View>(cPtr);
 451             return ret;
 452         }
 453
 454         internal PreFocusChangeSignal PreFocusChangeSignal()
 455         {
 456             PreFocusChangeSignal ret = new PreFocusChangeSignal(Interop.FocusManager.FocusManager_PreFocusChangeSignal(swigCPtr), false);
 457             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 458             return ret;
 459         }
 460
 461         internal FocusChangedSignal FocusChangedSignal()
 462         {
 463             FocusChangedSignal ret = new FocusChangedSignal(Interop.FocusManager.FocusManager_FocusChangedSignal(swigCPtr), false);
 464             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 465             return ret;
 466         }
 467
 468         internal FocusGroupChangedSignal FocusGroupChangedSignal()
 469         {
 470             FocusGroupChangedSignal ret = new FocusGroupChangedSignal(Interop.FocusManager.FocusManager_FocusGroupChangedSignal(swigCPtr), false);
 471             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 472             return ret;
 473         }
 474
 475         internal ViewSignal FocusedViewEnterKeySignal()
 476         {
 477             ViewSignal ret = new ViewSignal(Interop.FocusManager.FocusManager_FocusedActorEnterKeySignal(swigCPtr), false);
 478             if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
 479             return ret;
 480         }
 481
 482         private IntPtr OnPreFocusChange(IntPtr current, IntPtr proposed, View.FocusDirection direction)
 483         {
 484             View view = null;
 485             PreFocusChangeEventArgs e = new PreFocusChangeEventArgs();
 486
 487             if (current != global::System.IntPtr.Zero)
 488             {
 489                 e.CurrentView = Registry.GetManagedBaseHandleFromNativePtr(current) as View;
 490             }
 491             if (proposed != global::System.IntPtr.Zero)
 492             {
 493                 e.ProposedView = Registry.GetManagedBaseHandleFromNativePtr(proposed) as View;
 494             }
 495             e.Direction = direction;
 496
 497             if (_preFocusChangeEventHandler != null)
 498             {
 499                 view = _preFocusChangeEventHandler(this, e);
 500             }
 501
 502             if (view)
 503             {
 504                 return view.GetPtrfromView();
 505             }
 506             else
 507             {
 508                 if (e.ProposedView) return proposed;
 509                 else return current;
 510             }
 511         }
 512
 513         private void OnFocusChanged(IntPtr current, IntPtr next)
 514         {
 515             FocusChangedEventArgs e = new FocusChangedEventArgs();
 516
 517             e.CurrentView = Registry.GetManagedBaseHandleFromNativePtr(current) as View;
 518             e.NextView = Registry.GetManagedBaseHandleFromNativePtr(next) as View;
 519
 520             if (_focusChangedEventHandler != null)
 521             {
 522                 _focusChangedEventHandler(this, e);
 523             }
 524         }
 525
 526         private void OnFocusGroupChanged(IntPtr current, bool forwardDirection)
 527         {
 528             FocusGroupChangedEventArgs e = new FocusGroupChangedEventArgs();
 529
 530             e.CurrentView = Registry.GetManagedBaseHandleFromNativePtr(current) as View;
 531             e.ForwardDirection = forwardDirection;
 532
 533             if (_focusGroupChangedEventHandler != null)
 534             {
 535                 _focusGroupChangedEventHandler(this, e);
 536             }
 537         }
 538
 539         private void OnFocusedViewEnterKey(IntPtr view)
 540         {
 541             FocusedViewActivatedEventArgs e = new FocusedViewActivatedEventArgs();
 542
 543             e.View = Registry.GetManagedBaseHandleFromNativePtr(view) as View;
 544
 545             if (_focusedViewEnterKeyEventHandler != null)
 546             {
 547                 _focusedViewEnterKeyEventHandler(this, e);
 548             }
 549         }
 550
 551         /// <summary>
 552         /// Please do not use! this will be deprecated!
 553         /// </summary>
 554         /// Please do not use! this will be deprecated!
 555         /// Instead please use OnFocusedViewEnterKey.
 556         [Obsolete("Please do not use! This will be deprecated! Please use FocusManager.OnFocusedViewEnterKey instead!")]
 557         [EditorBrowsable(EditorBrowsableState.Never)]
 558         private void OnFocusedViewEnterKey2(IntPtr view)
 559         {
 560             FocusedViewActivatedEventArgs e = new FocusedViewActivatedEventArgs();
 561
 562             e.View = Registry.GetManagedBaseHandleFromNativePtr(view) as View;
 563
 564             if (_focusedViewEnterKeyEventHandler != null)
 565             {
 566                 _focusedViewEnterKeyEventHandler(this, e);
 567             }
 568         }
 569
 570         ///<summary>
 571         /// Event arguments that passed via the PreFocusChange signal.
 572         /// </summary>
 573         /// <since_tizen> 3 </since_tizen>
 574         public class PreFocusChangeEventArgs : EventArgs
 575         {
 576             private View _current;
 577             private View _proposed;
 578             private View.FocusDirection _direction;
 579
 580             /// <summary>
 581             /// The current focus view.
 582             /// </summary>
 583             /// <since_tizen> 3 </since_tizen>
 584             public View CurrentView
 585             {
 586                 get
 587                 {
 588                     return _current;
 589                 }
 590                 set
 591                 {
 592                     _current = value;
 593                 }
 594             }
 595
 596             /// <summary>
 597             /// The  proposed view.
 598             /// </summary>
 599             /// <since_tizen> 3 </since_tizen>
 600             public View ProposedView
 601             {
 602                 get
 603                 {
 604                     return _proposed;
 605                 }
 606                 set
 607                 {
 608                     _proposed = value;
 609                 }
 610             }
 611
 612             /// <summary>
 613             /// The focus move direction.
 614             /// </summary>
 615             /// <since_tizen> 3 </since_tizen>
 616             public View.FocusDirection Direction
 617             {
 618                 get
 619                 {
 620                     return _direction;
 621                 }
 622                 set
 623                 {
 624                     _direction = value;
 625                 }
 626             }
 627         }
 628
 629         ///<summary>
 630         /// Event arguments that passed via the FocusChanged signal.
 631         /// </summary>
 632         /// <since_tizen> 3 </since_tizen>
 633         public class FocusChangedEventArgs : EventArgs
 634         {
 635             private View _current;
 636             private View _next;
 637
 638             /// <summary>
 639             /// The current focus view.
 640             /// </summary>
 641             /// <since_tizen> 3 </since_tizen>
 642             public View CurrentView
 643             {
 644                 get
 645                 {
 646                     return _current;
 647                 }
 648                 set
 649                 {
 650                     _current = value;
 651                 }
 652             }
 653             /// <summary>
 654             /// The next focus view.
 655             /// </summary>
 656             /// <since_tizen> 3 </since_tizen>
 657             public View NextView
 658             {
 659                 get
 660                 {
 661                     return _next;
 662                 }
 663                 set
 664                 {
 665                     _next = value;
 666                 }
 667             }
 668         }
 669
 670         ///<summary>
 671         /// Event arguments that passed via the FocusGroupChanged signal.
 672         /// </summary>
 673         /// <since_tizen> 3 </since_tizen>
 674         public class FocusGroupChangedEventArgs : EventArgs
 675         {
 676             private View _current;
 677             private bool _forwardDirection;
 678
 679             /// <summary>
 680             /// The current focus view.
 681             /// </summary>
 682             /// <since_tizen> 3 </since_tizen>
 683             public View CurrentView
 684             {
 685                 get
 686                 {
 687                     return _current;
 688                 }
 689                 set
 690                 {
 691                     _current = value;
 692                 }
 693             }
 694
 695             /// <summary>
 696             /// The forward direction.
 697             /// </summary>
 698             /// <since_tizen> 3 </since_tizen>
 699             public bool ForwardDirection
 700             {
 701                 get
 702                 {
 703                     return _forwardDirection;
 704                 }
 705                 set
 706                 {
 707                     _forwardDirection = value;
 708                 }
 709             }
 710         }
 711
 712         ///<summary>
 713         /// Event arguments that passed via the FocusedViewEnterKey signal.
 714         /// </summary>
 715         /// <since_tizen> 3 </since_tizen>
 716         public class FocusedViewActivatedEventArgs : EventArgs
 717         {
 718             private View _view;
 719
 720             /// <summary>
 721             /// View.
 722             /// </summary>
 723             /// <since_tizen> 3 </since_tizen>
 724             public View View
 725             {
 726                 get
 727                 {
 728                     return _view;
 729                 }
 730                 set
 731                 {
 732                     _view = value;
 733                 }
 734             }
 735         }
 736
 737         /// <summary>
 738         /// Please do not use! this will be deprecated
 739         /// </summary>
 740         /// <since_tizen> 3 </since_tizen>
 741         /// Please do not use! this will be deprecated.
 742         /// Instead please use FocusedViewActivatedEventArgs.
 743         [Obsolete("Please do not use! This will be deprecated! Please use FocusedViewActivatedEventArgs instead! " +
 744             "Like: " +
 745             "FocusManager.Instance.FocusedViewActivated = OnFocusedViewActivated; " +
 746             "private void OnFocusedViewActivated(object source, FocusManager.FocusedViewActivatedEventArgs arg)" +
 747             "{...}")]
 748         [EditorBrowsable(EditorBrowsableState.Never)]
 749         public class FocusedViewEnterKeyEventArgs : EventArgs
 750         {
 751             private View _view;
 752
 753             /// <summary>
 754             /// View.
 755             /// </summary>
 756             /// <since_tizen> 3 </since_tizen>
 757             public View View
 758             {
 759                 get
 760                 {
 761                     return _view;
 762                 }
 763                 set
 764                 {
 765                     _view = value;
 766                 }
 767             }
 768         }
 769
 770         private class CustomAlgorithmInterfaceWrapper : CustomAlgorithmInterface
 771         {
 772             private FocusManager.ICustomFocusAlgorithm _customFocusAlgorithm;
 773
 774             public CustomAlgorithmInterfaceWrapper()
 775             {
 776             }
 777
 778             public void SetFocusAlgorithm(FocusManager.ICustomFocusAlgorithm customFocusAlgorithm)
 779             {
 780                 _customFocusAlgorithm = customFocusAlgorithm;
 781             }
 782
 783             public override View GetNextFocusableView(View current, View proposed, View.FocusDirection direction)
 784             {
 785                 return _customFocusAlgorithm.GetNextFocusableView(current, proposed, direction);
 786             }
 787         }
 788
 789
 790     }
 791 }