src/Tizen.NUI.Components/Controls/DropDown.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 using System;
  18 using System.Collections.Generic;
  19 using Tizen.NUI.BaseComponents;
  20 using System.ComponentModel;
  21
  22 namespace Tizen.NUI.Components
  23 {
  24     /// <summary>
  25     /// DropDown is one kind of common component, a dropdown allows the user click dropdown button to choose one value from a list.
  26     /// </summary>
  27     /// <since_tizen> 6 </since_tizen>
  28     /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
  29     [EditorBrowsable(EditorBrowsableState.Never)]
  30     public class DropDown : Control
  31     {
  32         #region DropDown
  33         private Button button = null;
  34         private TextLabel headerText = null;
  35         private TextLabel buttonText = null;
  36         private ImageView listBackgroundImage = null;
  37         private FlexibleView list = null;
  38         private DropDownListBridge adapter = new DropDownListBridge();
  39         private DropDownAttributes dropDownAttributes = null;
  40         private DropDownItemView touchedView = null;
  41         private int selectedItemIndex = -1;
  42
  43         private Extents listMargin = null;
  44         private Extents listPadding = null;
  45
  46         /// <summary>
  47         /// Creates a new instance of a DropDown.
  48         /// </summary>
  49         /// <since_tizen> 6 </since_tizen>
  50         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
  51         [EditorBrowsable(EditorBrowsableState.Never)]
  52         public DropDown() : base()
  53         {
  54             Initialize();
  55         }
  56         /// <summary>
  57         /// Creates a new instance of a DropDown with style.
  58         /// </summary>
  59         /// <param name="style">Create DropDown by special style defined in UX.</param>
  60         /// <since_tizen> 6 </since_tizen>
  61         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
  62         [EditorBrowsable(EditorBrowsableState.Never)]
  63         public DropDown(string style) : base(style)
  64         {
  65             Initialize();
  66         }
  67         /// <summary>
  68         /// Creates a new instance of a DropDown with attributes.
  69         /// </summary>
  70         /// <param name="attributes">Create DropDown by attributes customized by user.</param>
  71         /// <since_tizen> 6 </since_tizen>
  72         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
  73         [EditorBrowsable(EditorBrowsableState.Never)]
  74         public DropDown(DropDownAttributes attributes) : base(attributes)
  75         {
  76             Initialize();
  77         }
  78
  79         /// <summary>
  80         /// An event for the button clicked signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
  81         /// </summary>
  82         /// <since_tizen> 6 </since_tizen>
  83         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
  84         [EditorBrowsable(EditorBrowsableState.Never)]
  85         public delegate void ClickEventHandler<ClickEventArgs>(object sender, ClickEventArgs e);
  86
  87         /// <summary>
  88         /// An event for the item clicked signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
  89         /// </summary>
  90         /// <since_tizen> 6 </since_tizen>
  91         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
  92         [EditorBrowsable(EditorBrowsableState.Never)]
  93         public event ClickEventHandler<ItemClickEventArgs> ItemClickEvent;
  94
  95         /// <summary>
  96         /// List orientation.
  97         /// </summary>
  98         /// <since_tizen> 6 </since_tizen>
  99         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 100         [EditorBrowsable(EditorBrowsableState.Never)]
 101         public enum ListOrientation
 102         {
 103             /// <summary>
 104             /// Left.
 105             /// </summary>
 106             /// <since_tizen> 6 </since_tizen>
 107             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 108             [EditorBrowsable(EditorBrowsableState.Never)]
 109             Left,
 110             /// <summary>
 111             /// Right.
 112             /// </summary>
 113             /// <since_tizen> 6 </since_tizen>
 114             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 115             [EditorBrowsable(EditorBrowsableState.Never)]
 116             Right,
 117         }
 118
 119         /// <summary>
 120         /// Header text string in DropDown.
 121         /// </summary>
 122         /// <since_tizen> 6 </since_tizen>
 123         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 124         [EditorBrowsable(EditorBrowsableState.Never)]
 125         public string HeaderText
 126         {
 127             get
 128             {
 129                 return dropDownAttributes.HeaderTextAttributes?.Text.All;
 130             }
 131             set
 132             {
 133                 if (value != null)
 134                 {
 135                     CreateHeaderTextAttributes();
 136                     if (dropDownAttributes.HeaderTextAttributes.Text == null)
 137                     {
 138                         dropDownAttributes.HeaderTextAttributes.Text = new StringSelector();
 139                     }
 140                     dropDownAttributes.HeaderTextAttributes.Text.All = value;
 141                     RelayoutRequest();
 142                 }
 143             }
 144         }
 145
 146         /// <summary>
 147         /// Header text point size in DropDown.
 148         /// </summary>
 149         /// <since_tizen> 6 </since_tizen>
 150         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 151         [EditorBrowsable(EditorBrowsableState.Never)]
 152         public float HeaderTextPointSize
 153         {
 154             get
 155             {
 156                 return dropDownAttributes.HeaderTextAttributes?.PointSize?.All ?? 0;
 157             }
 158             set
 159             {
 160                 CreateHeaderTextAttributes();
 161                 if (dropDownAttributes.HeaderTextAttributes.PointSize == null)
 162                 {
 163                     dropDownAttributes.HeaderTextAttributes.PointSize = new FloatSelector();
 164                 }
 165                 dropDownAttributes.HeaderTextAttributes.PointSize.All = value;
 166                 RelayoutRequest();
 167             }
 168         }
 169
 170         /// <summary>
 171         /// Header text font family in DropDown.
 172         /// </summary>
 173         /// <since_tizen> 6 </since_tizen>
 174         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 175         [EditorBrowsable(EditorBrowsableState.Never)]
 176         public string HeaderTextFontFamily
 177         {
 178             get
 179             {
 180                 return dropDownAttributes.HeaderTextAttributes?.FontFamily;
 181             }
 182             set
 183             {
 184                 CreateHeaderTextAttributes();
 185                 dropDownAttributes.HeaderTextAttributes.FontFamily = value;
 186                 RelayoutRequest();
 187             }
 188         }
 189
 190         /// <summary>
 191         /// Header text color in DropDown.
 192         /// </summary>
 193         /// <since_tizen> 6 </since_tizen>
 194         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 195         [EditorBrowsable(EditorBrowsableState.Never)]
 196         public Color HeaderTextColor
 197         {
 198             get
 199             {
 200                 return dropDownAttributes.HeaderTextAttributes?.TextColor?.All;
 201             }
 202             set
 203             {
 204                 CreateHeaderTextAttributes();
 205                 if (dropDownAttributes.HeaderTextAttributes.TextColor == null)
 206                 {
 207                     dropDownAttributes.HeaderTextAttributes.TextColor = new ColorSelector();
 208                 }
 209                 dropDownAttributes.HeaderTextAttributes.TextColor.All = value;
 210                 RelayoutRequest();
 211             }
 212         }
 213
 214         /// <summary>
 215         /// Header text color selector in DropDown.
 216         /// </summary>
 217         /// <since_tizen> 6 </since_tizen>
 218         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 219         [EditorBrowsable(EditorBrowsableState.Never)]
 220         public ColorSelector HeaderTextColorSelector
 221         {
 222             get
 223             {
 224                 return dropDownAttributes.HeaderTextAttributes?.TextColor;
 225             }
 226             set
 227             {
 228                 CreateHeaderTextAttributes();
 229                 if (value != null)
 230                 {
 231                     dropDownAttributes.HeaderTextAttributes.TextColor = value.Clone() as ColorSelector;
 232                     RelayoutRequest();
 233                 }
 234             }
 235         }
 236
 237         /// <summary>
 238         /// Button text string in DropDown.
 239         /// </summary>
 240         /// <since_tizen> 6 </since_tizen>
 241         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 242         [EditorBrowsable(EditorBrowsableState.Never)]
 243         public string ButtonText
 244         {
 245             get
 246             {
 247                 return dropDownAttributes.ButtonAttributes?.TextAttributes?.Text.All;
 248             }
 249             set
 250             {
 251                 if (value != null)
 252                 {
 253                     CreateButtonTextAttributes();
 254                     if (dropDownAttributes.ButtonAttributes.TextAttributes.Text == null)
 255                     {
 256                         dropDownAttributes.ButtonAttributes.TextAttributes.Text = new StringSelector();
 257                     }
 258                     dropDownAttributes.ButtonAttributes.TextAttributes.Text.All = value;
 259                     RelayoutRequest();
 260                 }
 261             }
 262         }
 263
 264         /// <summary>
 265         /// Button text point size in DropDown.
 266         /// </summary>
 267         /// <since_tizen> 6 </since_tizen>
 268         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 269         [EditorBrowsable(EditorBrowsableState.Never)]
 270         public float ButtonTextPointSize
 271         {
 272             get
 273             {
 274                 return dropDownAttributes.ButtonAttributes?.TextAttributes?.PointSize?.All ?? 0;
 275             }
 276             set
 277             {
 278                 CreateButtonTextAttributes();
 279                 if (dropDownAttributes.ButtonAttributes.TextAttributes.PointSize == null)
 280                 {
 281                     dropDownAttributes.ButtonAttributes.TextAttributes.PointSize = new FloatSelector();
 282                 }
 283                 dropDownAttributes.ButtonAttributes.TextAttributes.PointSize.All = value;
 284                 RelayoutRequest();
 285             }
 286         }
 287
 288         /// <summary>
 289         /// Button text font family in DropDown.
 290         /// </summary>
 291         /// <since_tizen> 6 </since_tizen>
 292         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 293         [EditorBrowsable(EditorBrowsableState.Never)]
 294         public string ButtonTextFontFamily
 295         {
 296             get
 297             {
 298                 return dropDownAttributes.ButtonAttributes?.TextAttributes?.FontFamily;
 299             }
 300             set
 301             {
 302                 CreateButtonTextAttributes();
 303                 dropDownAttributes.ButtonAttributes.TextAttributes.FontFamily = value;
 304                 RelayoutRequest();
 305             }
 306         }
 307
 308         /// <summary>
 309         /// Button text color in DropDown.
 310         /// </summary>
 311         /// <since_tizen> 6 </since_tizen>
 312         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 313         [EditorBrowsable(EditorBrowsableState.Never)]
 314         public Color ButtonTextColor
 315         {
 316             get
 317             {
 318                 return dropDownAttributes.ButtonAttributes?.TextAttributes?.TextColor?.All;
 319             }
 320             set
 321             {
 322                 CreateButtonTextAttributes();
 323                 if (dropDownAttributes.ButtonAttributes.TextAttributes.TextColor == null)
 324                 {
 325                     dropDownAttributes.ButtonAttributes.TextAttributes.TextColor = new ColorSelector();
 326                 }
 327                 dropDownAttributes.ButtonAttributes.TextAttributes.TextColor.All = value;
 328                 RelayoutRequest();
 329             }
 330         }
 331
 332         /// <summary>
 333         /// Button text color selector in DropDown.
 334         /// </summary>
 335         /// <since_tizen> 6 </since_tizen>
 336         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 337         [EditorBrowsable(EditorBrowsableState.Never)]
 338         public ColorSelector ButtonTextColorSelector
 339         {
 340             get
 341             {
 342                 return dropDownAttributes.ButtonAttributes?.TextAttributes?.TextColor;
 343             }
 344             set
 345             {
 346                 CreateButtonTextAttributes();
 347                 if (value != null)
 348                 {
 349                     dropDownAttributes.ButtonAttributes.TextAttributes.TextColor = value.Clone() as ColorSelector;
 350                     RelayoutRequest();
 351                 }
 352             }
 353         }
 354
 355         /// <summary>
 356         /// Button icon image's resource url in DropDown.
 357         /// </summary>
 358         /// <since_tizen> 6 </since_tizen>
 359         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 360         [EditorBrowsable(EditorBrowsableState.Never)]
 361         public string ButtonIconImageURL
 362         {
 363             get
 364             {
 365                 return dropDownAttributes.ButtonAttributes?.IconAttributes?.ResourceURL.All;
 366             }
 367             set
 368             {
 369                 if (value != null)
 370                 {
 371                     CreateButtonIconAttributes();
 372                     if (dropDownAttributes.ButtonAttributes.IconAttributes.ResourceURL == null)
 373                     {
 374                         dropDownAttributes.ButtonAttributes.IconAttributes.ResourceURL = new StringSelector();
 375                     }
 376                     dropDownAttributes.ButtonAttributes.IconAttributes.ResourceURL.All = value;
 377                     RelayoutRequest();
 378                 }
 379             }
 380         }
 381
 382         /// <summary>
 383         /// Button icon image's size in DropDown.
 384         /// </summary>
 385         /// <since_tizen> 6 </since_tizen>
 386         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 387         [EditorBrowsable(EditorBrowsableState.Never)]
 388         public Size ButtonIconSize
 389         {
 390             get
 391             {
 392                 return dropDownAttributes.ButtonAttributes?.IconAttributes?.Size;
 393             }
 394             set
 395             {
 396                 if (value != null)
 397                 {
 398                     CreateButtonIconAttributes();
 399                     dropDownAttributes.ButtonAttributes.IconAttributes.Size = value;
 400                     RelayoutRequest();
 401                 }
 402             }
 403         }
 404
 405         /// <summary>
 406         /// Space between button text and button icon in DropDown.
 407         /// </summary>
 408         /// <since_tizen> 6 </since_tizen>
 409         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 410         [EditorBrowsable(EditorBrowsableState.Never)]
 411         public int SpaceBetweenButtonTextAndIcon
 412         {
 413             get
 414             {
 415                 return dropDownAttributes.SpaceBetweenButtonTextAndIcon;
 416             }
 417             set
 418             {
 419                 dropDownAttributes.SpaceBetweenButtonTextAndIcon = value;
 420                 RelayoutRequest();
 421             }
 422         }
 423
 424         /// <summary>
 425         /// Left space in DropDown.
 426         /// </summary>
 427         /// <since_tizen> 6 </since_tizen>
 428         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 429         [EditorBrowsable(EditorBrowsableState.Never)]
 430         public int LeftSpace
 431         {
 432             get
 433             {
 434                 return (int)dropDownAttributes.Space.X;
 435             }
 436             set
 437             {
 438                 dropDownAttributes.Space.X = value;
 439                 RelayoutRequest();
 440             }
 441         }
 442
 443         /// <summary>
 444         /// Right space in DropDown.
 445         /// </summary>
 446         /// <since_tizen> 6 </since_tizen>
 447         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 448         [EditorBrowsable(EditorBrowsableState.Never)]
 449         public int RightSpace
 450         {
 451             get
 452             {
 453                 return (int)dropDownAttributes.Space.Y;
 454             }
 455             set
 456             {
 457                 dropDownAttributes.Space.Y = value;
 458                 RelayoutRequest();
 459             }
 460         }
 461
 462         /// <summary>
 463         /// List background image's resource url in DropDown.
 464         /// </summary>
 465         /// <since_tizen> 6 </since_tizen>
 466         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 467         [EditorBrowsable(EditorBrowsableState.Never)]
 468         public string ListBackgroundImageURL
 469         {
 470             get
 471             {
 472                 return dropDownAttributes.ListBackgroundImageAttributes?.ResourceURL?.All;
 473             }
 474             set
 475             {
 476                 if (value != null)
 477                 {
 478                     CreateListBackgroundAttributes();
 479                     if (dropDownAttributes.ListBackgroundImageAttributes.ResourceURL == null)
 480                     {
 481                         dropDownAttributes.ListBackgroundImageAttributes.ResourceURL = new StringSelector();
 482                     }
 483                     dropDownAttributes.ListBackgroundImageAttributes.ResourceURL.All = value;
 484                     RelayoutRequest();
 485                 }
 486             }
 487         }
 488
 489         /// <summary>
 490         /// List background image's border in DropDown.
 491         /// </summary>
 492         /// <since_tizen> 6 </since_tizen>
 493         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 494         [EditorBrowsable(EditorBrowsableState.Never)]
 495         public Rectangle ListBackgroundImageBorder
 496         {
 497             get
 498             {
 499                 return dropDownAttributes.ListBackgroundImageAttributes?.Border?.All;
 500             }
 501             set
 502             {
 503                 if (value != null)
 504                 {
 505                     CreateListBackgroundAttributes();
 506                     if (dropDownAttributes.ListBackgroundImageAttributes.Border == null)
 507                     {
 508                         dropDownAttributes.ListBackgroundImageAttributes.Border = new RectangleSelector();
 509                     }
 510                     dropDownAttributes.ListBackgroundImageAttributes.Border.All = value;
 511                     RelayoutRequest();
 512                 }
 513             }
 514         }
 515
 516         /// <summary>
 517         /// List relative orientation in DropDown.
 518         /// </summary>
 519         /// <since_tizen> 6 </since_tizen>
 520         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 521         [EditorBrowsable(EditorBrowsableState.Never)]
 522         public ListOrientation ListRelativeOrientation
 523         {
 524             get
 525             {
 526                 return dropDownAttributes.ListRelativeOrientation;
 527             }
 528             set
 529             {
 530                 dropDownAttributes.ListRelativeOrientation = value;
 531                 RelayoutRequest();
 532             }
 533         }
 534
 535         /// <summary>
 536         /// Space in list.
 537         /// </summary>
 538         /// <since_tizen> 6 </since_tizen>
 539         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 540         [EditorBrowsable(EditorBrowsableState.Never)]
 541         public Extents ListMargin
 542         {
 543             get
 544             {
 545                 return listMargin;
 546             }
 547             set
 548             {
 549                 dropDownAttributes.ListMargin.CopyFrom(value);
 550
 551                 if (null == listMargin)
 552                 {
 553                     listMargin = new Extents((ushort start, ushort end, ushort top, ushort bottom) =>
 554                     {
 555                         dropDownAttributes.ListMargin.Start = start;
 556                         dropDownAttributes.ListMargin.End = end;
 557                         dropDownAttributes.ListMargin.Top = top;
 558                         dropDownAttributes.ListMargin.Bottom = bottom;
 559                         RelayoutRequest();
 560                     }, value.Start, value.End, value.Top, value.Bottom);
 561                 }
 562                 else
 563                 {
 564                     listMargin.CopyFrom(value);
 565                 }
 566
 567                 RelayoutRequest();
 568             }
 569         }
 570
 571         /// <summary>
 572         /// Focused item index in list.
 573         /// </summary>
 574         /// <since_tizen> 6 </since_tizen>
 575         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 576         [EditorBrowsable(EditorBrowsableState.Never)]
 577         public int FocusedItemIndex
 578         {
 579             get
 580             {
 581                 return dropDownAttributes.FocusedItemIndex;
 582             }
 583             set
 584             {
 585                 dropDownAttributes.FocusedItemIndex = value;
 586                 RelayoutRequest();
 587             }
 588         }
 589
 590         /// <summary>
 591         /// Selected item index in list.
 592         /// </summary>
 593         /// <since_tizen> 6 </since_tizen>
 594         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 595         [EditorBrowsable(EditorBrowsableState.Never)]
 596         public int SelectedItemIndex
 597         {
 598             get
 599             {
 600                 return selectedItemIndex;
 601             }
 602             set
 603             {
 604                 if (value == selectedItemIndex || adapter == null || value >= adapter.GetItemCount())
 605                 {
 606                     return;
 607                 }
 608                 UpdateSelectedItem(value);
 609             }
 610         }
 611
 612         /// <summary>
 613         /// List size in DropDown.
 614         /// </summary>
 615         /// <since_tizen> 6 </since_tizen>
 616         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 617         [EditorBrowsable(EditorBrowsableState.Never)]
 618         public Size ListSize
 619         {
 620             get
 621             {
 622                 return dropDownAttributes.ListSize;
 623             }
 624             set
 625             {
 626                 dropDownAttributes.ListSize = value;
 627                 RelayoutRequest();
 628             }
 629         }
 630
 631         /// <summary>
 632         /// List padding in DropDown.
 633         /// </summary>
 634         /// <since_tizen> 6 </since_tizen>
 635         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 636         [EditorBrowsable(EditorBrowsableState.Never)]
 637         public Extents ListPadding
 638         {
 639             get
 640             {
 641                 return listPadding;
 642             }
 643             set
 644             {
 645                 dropDownAttributes.ListPadding.CopyFrom(value);
 646
 647                 if (null == listPadding)
 648                 {
 649                     listPadding = new Extents((ushort start, ushort end, ushort top, ushort bottom) =>
 650                     {
 651                         dropDownAttributes.ListPadding.Start = start;
 652                         dropDownAttributes.ListPadding.End = end;
 653                         dropDownAttributes.ListPadding.Top = top;
 654                         dropDownAttributes.ListPadding.Bottom = bottom;
 655                         RelayoutRequest();
 656                     }, value.Start, value.End, value.Top, value.Bottom);
 657                 }
 658                 else
 659                 {
 660                     listMargin.CopyFrom(value);
 661                 }
 662
 663                 RelayoutRequest();
 664             }
 665         }
 666
 667         /// <summary>
 668         /// Add list item by item data. The added item will be added to end of all items automatically.
 669         /// </summary>
 670         /// <param name="itemData">Item data which will apply to tab item view.</param>
 671         /// <since_tizen> 6 </since_tizen>
 672         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 673         [EditorBrowsable(EditorBrowsableState.Never)]
 674         public void AddItem(DropDownItemData itemData)
 675         {
 676             adapter.InsertData(-1, itemData);
 677         }
 678
 679         /// <summary>
 680         /// Delete list item by index.
 681         /// </summary>
 682         /// <param name="index">Position index where will be deleted.</param>
 683         /// <since_tizen> 6 </since_tizen>
 684         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 685         [EditorBrowsable(EditorBrowsableState.Never)]
 686         public void DeleteItem(int index)
 687         {
 688             if(index < 0 || index >= adapter.GetItemCount())
 689             {
 690                 return;
 691             }
 692
 693             if (selectedItemIndex == index)
 694             {
 695                 selectedItemIndex = -1;
 696             }
 697             else if(selectedItemIndex > index)
 698             {
 699                 selectedItemIndex--;
 700             }
 701
 702             adapter.RemoveData(index);
 703         }
 704
 705         /// <summary>
 706         /// Insert list item by item data. The inserted item will be added to the special position by index automatically.
 707         /// </summary>
 708         /// <param name="item">Item data which will apply to tab item view.</param>
 709         /// <param name="index">Position index where will be inserted.</param>
 710         /// <since_tizen> 6 </since_tizen>
 711         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 712         [EditorBrowsable(EditorBrowsableState.Never)]
 713         public void InsertItem(DropDownItemData item, int index)
 714         {
 715             if (index < 0 || index >= adapter.GetItemCount())
 716             {
 717                 return;
 718             }
 719
 720             if (selectedItemIndex >= index)
 721             {
 722                 selectedItemIndex++;
 723             }
 724
 725             adapter.InsertData(index, item);
 726         }
 727
 728         /// <summary>
 729         /// Add scroll bar to list.
 730         /// </summary>
 731         /// <param name="scrollBar">Scroll bar defined by user which will be added to list.</param>
 732         /// <since_tizen> 6 </since_tizen>
 733         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 734         [EditorBrowsable(EditorBrowsableState.Never)]
 735         public void AttachScrollBar(ScrollBar scrollBar)
 736         {
 737             if (list == null)
 738             {
 739                 return;
 740             }
 741             list.AttachScrollBar(scrollBar);
 742         }
 743
 744         /// <summary>
 745         /// Detach scroll bar to list.
 746         /// </summary>
 747         /// <since_tizen> 6 </since_tizen>
 748         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 749         [EditorBrowsable(EditorBrowsableState.Never)]
 750         public void DetachScrollBar()
 751         {
 752             if (list == null)
 753             {
 754                 return;
 755             }
 756             list.DetachScrollBar();
 757         }
 758
 759         /// <summary>
 760         /// Update DropDown by attributes.
 761         /// </summary>
 762         /// <since_tizen> 6 </since_tizen>
 763         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 764         [EditorBrowsable(EditorBrowsableState.Never)]
 765         protected override void OnUpdate()
 766         {
 767             if (dropDownAttributes.HeaderTextAttributes != null)
 768             {
 769                 if (headerText == null)
 770                 {
 771                     CreateHeaderText();
 772                 }
 773                 ApplyAttributes(headerText, dropDownAttributes.HeaderTextAttributes);
 774             }
 775
 776
 777             if (dropDownAttributes.ButtonAttributes != null)
 778             {
 779                 if (button == null)
 780                 {
 781                     CreateButton();
 782                 }
 783                 if (dropDownAttributes.Space != null)
 784                 {
 785                     button.Position2D.X = (int)dropDownAttributes.Space.X;
 786                 }
 787
 788                 if (dropDownAttributes.ButtonAttributes.TextAttributes != null)
 789                 {
 790                     ApplyAttributes(buttonText, dropDownAttributes.ButtonAttributes.TextAttributes);
 791                     button.TextSelector = dropDownAttributes.ButtonAttributes.TextAttributes.Text;
 792                     if (dropDownAttributes.ButtonAttributes.TextAttributes.PointSize != null)
 793                     {
 794                         button.PointSize = dropDownAttributes.ButtonAttributes.TextAttributes.PointSize.All.Value;
 795                     }
 796                     button.FontFamily = dropDownAttributes.ButtonAttributes.TextAttributes.FontFamily;
 797                     button.TextColorSelector = dropDownAttributes.ButtonAttributes.TextAttributes.TextColor;
 798                 }
 799                 if (dropDownAttributes.ButtonAttributes.IconAttributes != null)
 800                 {
 801                     button.IconURLSelector = dropDownAttributes.ButtonAttributes.IconAttributes.ResourceURL;
 802                     int iconWidth = 0;
 803                     int buttonTextWidth = 0;
 804                     if (dropDownAttributes.ButtonAttributes.IconAttributes.Size != null)
 805                     {
 806                         iconWidth = (int)dropDownAttributes.ButtonAttributes.IconAttributes.Size.Width;
 807                     }
 808                     if (buttonText.NaturalSize2D != null)
 809                     {
 810                         buttonTextWidth = buttonText.NaturalSize2D.Width;
 811                     }
 812                     button.SizeWidth = iconWidth + dropDownAttributes.SpaceBetweenButtonTextAndIcon + buttonTextWidth;
 813                 }
 814             }
 815
 816             if (dropDownAttributes.ListBackgroundImageAttributes != null)
 817             {
 818                 if (listBackgroundImage == null)
 819                 {
 820                     CreateListBackgroundImage();
 821                     CreateList();
 822                 }
 823                 ApplyAttributes(listBackgroundImage, dropDownAttributes.ListBackgroundImageAttributes);
 824                 list.FocusedItemIndex = dropDownAttributes.FocusedItemIndex;
 825                 list.Size = dropDownAttributes.ListSize;
 826                 list.Padding = dropDownAttributes.ListPadding;
 827
 828                 int listBackgroundImageX = 0;
 829                 int listBackgroundImageY = 0;
 830                 if (dropDownAttributes.ListRelativeOrientation == ListOrientation.Left)
 831                 {
 832                     if (dropDownAttributes.ListMargin != null)
 833                     {
 834                         listBackgroundImageX = (int)dropDownAttributes.ListMargin.Start;
 835                         listBackgroundImageY = (int)dropDownAttributes.ListMargin.Top;
 836                     }
 837                 }
 838                 else if (dropDownAttributes.ListRelativeOrientation == ListOrientation.Right)
 839                 {
 840                     if (dropDownAttributes.ListMargin != null)
 841                     {
 842                         int listWidth = 0;
 843                         if (list.Size2D != null)
 844                         {
 845                             listWidth = list.Size2D.Width;
 846                         }
 847                         listBackgroundImageX = Size2D.Width - listWidth - (int)dropDownAttributes.ListMargin.End;
 848                         listBackgroundImageY = (int)dropDownAttributes.ListMargin.Top;
 849                     }
 850                 }
 851                 listBackgroundImage.Position2D = new Position2D(listBackgroundImageX, listBackgroundImageY);
 852             }
 853         }
 854
 855         /// <summary>
 856         /// Dispose DropDown and all children on it.
 857         /// </summary>
 858         /// <param name="type">Dispose type.</param>
 859         /// <since_tizen> 6 </since_tizen>
 860         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 861         [EditorBrowsable(EditorBrowsableState.Never)]
 862         protected override void Dispose(DisposeTypes type)
 863         {
 864             if (disposed)
 865             {
 866                 return;
 867             }
 868
 869             if (type == DisposeTypes.Explicit)
 870             {
 871                 if (headerText != null)
 872                 {
 873                     Utility.Dispose(headerText);
 874                 }
 875
 876                 if (buttonText != null)
 877                 {
 878                     Utility.Dispose(buttonText);
 879                 }
 880
 881                 if (button != null)
 882                 {
 883                     Utility.Dispose(button);
 884                 }
 885
 886                 if (list != null)
 887                 {
 888                     if (listBackgroundImage != null)
 889                     {
 890                         Utility.Dispose(listBackgroundImage);
 891                     }
 892
 893                     Utility.Dispose(list);
 894                 }
 895             }
 896
 897             base.Dispose(type);
 898         }
 899
 900         /// <summary>
 901         /// Get DropDown attribues.
 902         /// </summary>
 903         /// <since_tizen> 6 </since_tizen>
 904         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 905         [EditorBrowsable(EditorBrowsableState.Never)]
 906         protected override Attributes GetAttributes()
 907         {
 908             return new DropDownAttributes();
 909         }
 910
 911         private void Initialize()
 912         {
 913             dropDownAttributes = attributes as DropDownAttributes;
 914             if (dropDownAttributes == null)
 915             {
 916                 throw new Exception("DropDown attribute parse error.");
 917             }
 918             ApplyAttributes(this, dropDownAttributes);
 919         }
 920
 921         private void OnClickEvent(object sender, ItemClickEventArgs e)
 922         {
 923             ItemClickEvent?.Invoke(sender, e);
 924         }
 925
 926         private void CreateHeaderText()
 927         {
 928             headerText = new TextLabel();
 929             headerText.Name = "DropDownHeaderText";
 930             Add(headerText);
 931         }
 932
 933         private void CreateButton()
 934         {
 935             button = new Button()
 936             {
 937                 PositionUsesPivotPoint = true,
 938                 ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
 939                 PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
 940                 HeightResizePolicy = ResizePolicyType.FillToParent,
 941                 IconRelativeOrientation = Button.IconOrientation.Right,
 942             };
 943             button.Name = "DropDownButton";
 944             button.ClickEvent += ButtonClickEvent;
 945             Add(button);
 946
 947             buttonText = new TextLabel()
 948             {
 949                 PositionUsesPivotPoint = true,
 950                 ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
 951                 PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
 952                 WidthResizePolicy = ResizePolicyType.UseNaturalSize,
 953                 HeightResizePolicy = ResizePolicyType.FillToParent,
 954             };
 955             buttonText.Name = "DropDownButtonText";
 956             Add(buttonText);
 957             buttonText.Hide();
 958         }
 959
 960         private void CreateList()
 961         {
 962             list = new FlexibleView();
 963             list.Name = "DropDownList";
 964             LinearLayoutManager layoutManager = new LinearLayoutManager(LinearLayoutManager.VERTICAL);
 965             list.SetLayoutManager(layoutManager);
 966             list.SetAdapter(adapter);
 967             list.Focusable = true;
 968             list.ItemTouchEvent += ListItemTouchEvent;
 969             list.ItemClickEvent += ListItemClickEvent;
 970             listBackgroundImage.Add(list);
 971             listBackgroundImage.Hide();
 972         }
 973
 974         private void ListItemClickEvent(object sender, FlexibleView.ItemClickEventArgs e)
 975         {
 976             if (e.ClickedView != null)
 977             {
 978                 UpdateSelectedItem(e.ClickedView.AdapterPosition);
 979
 980                 ItemClickEventArgs args = new ItemClickEventArgs();
 981                 args.Index = e.ClickedView.AdapterPosition;
 982                 args.Text = (e.ClickedView.ItemView as DropDownItemView)?.Text;
 983                 OnClickEvent(this, args);
 984             }
 985
 986             listBackgroundImage.Hide();
 987         }
 988
 989         private void ListItemTouchEvent(object sender, FlexibleView.ItemTouchEventArgs e)
 990         {
 991             PointStateType state = e.Touch.GetState(0);
 992             switch (state)
 993             {
 994                 case PointStateType.Down:
 995                     if (e.TouchedView != null)
 996                     {
 997                         touchedView = e.TouchedView.ItemView as DropDownItemView;
 998                         if (touchedView != null && touchedView.BackgroundColorSelector != null)
 999                         {
1000                             touchedView.BackgroundColor = touchedView.BackgroundColorSelector.GetValue(ControlStates.Pressed);
1001                         }
1002                     }
1003                     break;
1004                 case PointStateType.Motion:
1005                     if (touchedView != null && touchedView.BackgroundColorSelector != null)
1006                     {
1007                         touchedView.BackgroundColor = touchedView.BackgroundColorSelector.GetValue(ControlStates.Normal);
1008                     }
1009                     break;
1010                 case PointStateType.Up:
1011                     if (touchedView != null && touchedView.BackgroundColorSelector != null)
1012                     {
1013                         touchedView.BackgroundColor = touchedView.BackgroundColorSelector.GetValue(ControlStates.Selected);
1014                     }
1015                     break;
1016                 default:
1017                     break;
1018             }
1019         }
1020
1021         private void UpdateSelectedItem(int index)
1022         {
1023             if (selectedItemIndex != -1)
1024             {
1025                 DropDownItemData data = adapter.GetData(selectedItemIndex);
1026                 if(data != null)
1027                 {
1028                     data.IsSelected = false;
1029                 }
1030                 DropDownItemView view = list?.FindViewHolderForAdapterPosition(selectedItemIndex)?.ItemView as DropDownItemView;
1031                 if (view != null)
1032                 {
1033                     view.IsSelected = false;
1034                 }
1035             }
1036
1037             if (index != -1)
1038             {
1039                 DropDownItemData data = adapter.GetData(index);
1040                 if (data != null)
1041                 {
1042                     data.IsSelected = true;
1043                 }
1044                 DropDownItemView view = list?.FindViewHolderForAdapterPosition(index)?.ItemView as DropDownItemView;
1045                 if (view != null)
1046                 {
1047                     view.IsSelected = true;
1048                     button.Text = view.Text;
1049                 }
1050             }
1051
1052             selectedItemIndex = index;
1053         }
1054
1055         private void CreateListBackgroundImage()
1056         {
1057             listBackgroundImage = new ImageView
1058             {
1059                 Name = "ListBackgroundImage",
1060                 PositionUsesPivotPoint = true,
1061                 ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1062                 PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1063                 WidthResizePolicy = ResizePolicyType.FitToChildren,
1064                 HeightResizePolicy = ResizePolicyType.FitToChildren,
1065             };
1066             Add(listBackgroundImage);
1067         }
1068
1069         private void ButtonClickEvent(object sender, Button.ClickEventArgs e)
1070         {
1071             listBackgroundImage.Show();
1072         }
1073
1074         private void CreateHeaderTextAttributes()
1075         {
1076             if (dropDownAttributes.HeaderTextAttributes == null)
1077             {
1078                 dropDownAttributes.HeaderTextAttributes = new TextAttributes()
1079                 {
1080                     PositionUsesPivotPoint = true,
1081                     ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1082                     PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1083                     WidthResizePolicy = ResizePolicyType.FillToParent,
1084                     HeightResizePolicy = ResizePolicyType.FillToParent,
1085                     HorizontalAlignment = HorizontalAlignment.Center,
1086                     VerticalAlignment = VerticalAlignment.Center,
1087                 };
1088             }
1089         }
1090
1091         private void CreateButtonAttributes()
1092         {
1093             if (dropDownAttributes.ButtonAttributes == null)
1094             {
1095                 dropDownAttributes.ButtonAttributes = new ButtonAttributes();
1096             }
1097         }
1098
1099         private void CreateButtonTextAttributes()
1100         {
1101             CreateButtonAttributes();
1102
1103             if (dropDownAttributes.ButtonAttributes.TextAttributes == null)
1104             {
1105                 dropDownAttributes.ButtonAttributes.TextAttributes = new TextAttributes
1106                 {
1107                     PositionUsesPivotPoint = true,
1108                     ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1109                     PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1110                     WidthResizePolicy = ResizePolicyType.UseNaturalSize,
1111                     HeightResizePolicy = ResizePolicyType.FillToParent,
1112                     Position = new Position(0, 0),
1113                     HorizontalAlignment = HorizontalAlignment.Begin,
1114                     VerticalAlignment = VerticalAlignment.Center,
1115                 };
1116             }
1117         }
1118
1119         private void CreateButtonIconAttributes()
1120         {
1121             CreateButtonAttributes();
1122
1123             if (dropDownAttributes.ButtonAttributes.IconAttributes == null)
1124             {
1125                 dropDownAttributes.ButtonAttributes.IconAttributes = new ImageAttributes
1126                 {
1127                     PositionUsesPivotPoint = true,
1128                     ParentOrigin = Tizen.NUI.ParentOrigin.CenterRight,
1129                     PivotPoint = Tizen.NUI.PivotPoint.CenterRight,
1130                 };
1131             }
1132         }
1133
1134         private void CreateListBackgroundAttributes()
1135         {
1136             if (dropDownAttributes.ListBackgroundImageAttributes == null)
1137             {
1138                 dropDownAttributes.ListBackgroundImageAttributes = new ImageAttributes
1139                 {
1140                     PositionUsesPivotPoint = true,
1141                     ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1142                     PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1143                 };
1144             }
1145         }
1146         #endregion
1147
1148         #region ItemClickEventArgs
1149         /// <summary>
1150         /// ItemClickEventArgs is a class to record item click event arguments which will sent to user.
1151         /// </summary>
1152         /// <since_tizen> 6 </since_tizen>
1153         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1154         [EditorBrowsable(EditorBrowsableState.Never)]
1155         public class ItemClickEventArgs : EventArgs
1156         {
1157             /// <summary> Clicked item index of DropDown's list </summary>
1158             /// <since_tizen> 6 </since_tizen>
1159             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1160             [EditorBrowsable(EditorBrowsableState.Never)]
1161             public int Index;
1162             /// <summary> Clicked item text string of DropDown's list </summary>
1163             /// <since_tizen> 6 </since_tizen>
1164             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1165             [EditorBrowsable(EditorBrowsableState.Never)]
1166             public string Text;
1167         }
1168         #endregion
1169
1170         #region DropDownItemData
1171         /// <summary>
1172         /// DropDownItemData is a class to record all data which will be applied to DropDown item.
1173         /// </summary>
1174         /// <since_tizen> 6 </since_tizen>
1175         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1176         [EditorBrowsable(EditorBrowsableState.Never)]
1177         public class DropDownItemData
1178         {
1179             private DropDownItemAttributes itemDataAttributes = new DropDownItemAttributes();
1180
1181             /// <summary>
1182             /// Creates a new instance of a DropDownItemData.
1183             /// </summary>
1184             /// <since_tizen> 6 </since_tizen>
1185             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1186             [EditorBrowsable(EditorBrowsableState.Never)]
1187             public DropDownItemData()
1188             {
1189                 Initalize();
1190             }
1191
1192             /// <summary>
1193             /// Creates a new instance of a DropDownItemData with style.
1194             /// </summary>
1195             /// <param name="style">Create DropDownItemData by special style defined in UX.</param>
1196             /// <since_tizen> 6 </since_tizen>
1197             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1198             [EditorBrowsable(EditorBrowsableState.Never)]
1199             public DropDownItemData(string style)
1200             {
1201                 if(style != null)
1202                 {
1203                     Attributes attributes = StyleManager.Instance.GetAttributes(style);
1204                     if(attributes == null)
1205                     {
1206                         throw new InvalidOperationException($"There is no style {style}");
1207                     }
1208                     itemDataAttributes = attributes as DropDownItemAttributes;
1209                 }
1210                 Initalize();
1211             }
1212
1213             /// <summary>
1214             /// Creates a new instance of a DropDownItemData with attributes.
1215             /// </summary>
1216             /// <param name="attributes">Create DropDownItemData by attributes customized by user.</param>
1217             /// <since_tizen> 6 </since_tizen>
1218             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1219             [EditorBrowsable(EditorBrowsableState.Never)]
1220             public DropDownItemData(DropDownItemAttributes attributes)
1221             {
1222                 itemDataAttributes = attributes.Clone() as DropDownItemAttributes;
1223                 Initalize();
1224             }
1225
1226             /// <summary>
1227             /// DropDown item size.
1228             /// </summary>
1229             /// <since_tizen> 6 </since_tizen>
1230             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1231             [EditorBrowsable(EditorBrowsableState.Never)]
1232             public Size Size
1233             {
1234                 get
1235                 {
1236                     return itemDataAttributes.Size;
1237                 }
1238                 set
1239                 {
1240                     itemDataAttributes.Size = value;
1241                 }
1242             }
1243
1244             /// <summary>
1245             /// DropDown item background color selector.
1246             /// </summary>
1247             /// <since_tizen> 6 </since_tizen>
1248             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1249             [EditorBrowsable(EditorBrowsableState.Never)]
1250             public ColorSelector BackgroundColorSelector
1251             {
1252                 get
1253                 {
1254                     return itemDataAttributes.BackgroundColor;
1255                 }
1256                 set
1257                 {
1258                     if (itemDataAttributes.BackgroundColor == null)
1259                     {
1260                         itemDataAttributes.BackgroundColor = value.Clone() as ColorSelector;
1261                     }
1262                     else
1263                     {
1264                         itemDataAttributes.BackgroundColor = value.Clone();
1265                     }
1266
1267                 }
1268             }
1269
1270             /// <summary>
1271             /// DropDown item text string.
1272             /// </summary>
1273             /// <since_tizen> 6 </since_tizen>
1274             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1275             [EditorBrowsable(EditorBrowsableState.Never)]
1276             public string Text
1277             {
1278                 get
1279                 {
1280                     return itemDataAttributes.TextAttributes?.Text?.All;
1281                 }
1282                 set
1283                 {
1284                     CreateTextAttributes();
1285                     if (itemDataAttributes.TextAttributes.Text == null)
1286                     {
1287                         itemDataAttributes.TextAttributes.Text = new StringSelector { All = value };
1288                     }
1289                     else
1290                     {
1291                         itemDataAttributes.TextAttributes.Text.All = value;
1292                     }
1293                 }
1294             }
1295
1296             /// <summary>
1297             /// DropDown item text's point size.
1298             /// </summary>
1299             /// <since_tizen> 6 </since_tizen>
1300             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1301             [EditorBrowsable(EditorBrowsableState.Never)]
1302             public float PointSize
1303             {
1304                 get
1305                 {
1306                     return itemDataAttributes.TextAttributes?.PointSize?.All ?? 0;
1307                 }
1308                 set
1309                 {
1310                     CreateTextAttributes();
1311                     if (itemDataAttributes.TextAttributes.PointSize == null)
1312                     {
1313                         itemDataAttributes.TextAttributes.PointSize = new FloatSelector { All = value };
1314                     }
1315                     else
1316                     {
1317                         itemDataAttributes.TextAttributes.PointSize.All = value;
1318                     }
1319                 }
1320             }
1321
1322             /// <summary>
1323             /// DropDown item text's font family.
1324             /// </summary>
1325             /// <since_tizen> 6 </since_tizen>
1326             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1327             [EditorBrowsable(EditorBrowsableState.Never)]
1328             public string FontFamily
1329             {
1330                 get
1331                 {
1332                     return itemDataAttributes.TextAttributes?.FontFamily;
1333                 }
1334                 set
1335                 {
1336                     CreateTextAttributes();
1337                     itemDataAttributes.TextAttributes.FontFamily = value;
1338                 }
1339             }
1340
1341             /// <summary>
1342             /// DropDown item text's position.
1343             /// </summary>
1344             /// <since_tizen> 6 </since_tizen>
1345             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1346             [EditorBrowsable(EditorBrowsableState.Never)]
1347             public Position TextPosition
1348             {
1349                 get
1350                 {
1351                     return itemDataAttributes.TextAttributes?.Position;
1352                 }
1353                 set
1354                 {
1355                     CreateTextAttributes();
1356                     itemDataAttributes.TextAttributes.Position = value;
1357                 }
1358             }
1359
1360             /// <summary>
1361             /// DropDown item's icon's resource url.
1362             /// </summary>
1363             /// <since_tizen> 6 </since_tizen>
1364             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1365             [EditorBrowsable(EditorBrowsableState.Never)]
1366             public string IconResourceUrl
1367             {
1368                 get
1369                 {
1370                     return itemDataAttributes.IconAttributes?.ResourceURL?.All;
1371                 }
1372                 set
1373                 {
1374                     CreateIconAttributes();
1375                     if (itemDataAttributes.IconAttributes.ResourceURL == null)
1376                     {
1377                         itemDataAttributes.IconAttributes.ResourceURL = new StringSelector { All = value };
1378                     }
1379                     else
1380                     {
1381                         itemDataAttributes.IconAttributes.ResourceURL.All = value;
1382                     }
1383                 }
1384             }
1385
1386             /// <summary>
1387             /// DropDown item's icon's size.
1388             /// </summary>
1389             /// <since_tizen> 6 </since_tizen>
1390             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1391             [EditorBrowsable(EditorBrowsableState.Never)]
1392             public Size IconSize
1393             {
1394                 get
1395                 {
1396                     return itemDataAttributes.IconAttributes?.Size;
1397                 }
1398                 set
1399                 {
1400                     CreateIconAttributes();
1401                     itemDataAttributes.IconAttributes.Size = value;
1402                 }
1403             }
1404
1405             /// <summary>
1406             /// DropDown item's icon's position.
1407             /// </summary>
1408             /// <since_tizen> 6 </since_tizen>
1409             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1410             [EditorBrowsable(EditorBrowsableState.Never)]
1411             public Position IconPosition
1412             {
1413                 get
1414                 {
1415                     return itemDataAttributes.IconAttributes.Position;
1416                 }
1417                 set
1418                 {
1419                     CreateIconAttributes();
1420                     itemDataAttributes.IconAttributes.Position = value;
1421                 }
1422             }
1423
1424             /// <summary>
1425             /// DropDown item's check image's resource url.
1426             /// </summary>
1427             /// <since_tizen> 6 </since_tizen>
1428             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1429             [EditorBrowsable(EditorBrowsableState.Never)]
1430             public string CheckImageResourceUrl
1431             {
1432                 get
1433                 {
1434                     return itemDataAttributes.CheckImageAttributes?.ResourceURL?.All;
1435                 }
1436                 set
1437                 {
1438                     CreateCheckImageAttributes();
1439                     if (itemDataAttributes.CheckImageAttributes.ResourceURL == null)
1440                     {
1441                         itemDataAttributes.CheckImageAttributes.ResourceURL = new StringSelector { All = value };
1442                     }
1443                     else
1444                     {
1445                         itemDataAttributes.CheckImageAttributes.ResourceURL.All = value;
1446                     }
1447                 }
1448             }
1449
1450             /// <summary>
1451             /// DropDown item's check image's size.
1452             /// </summary>
1453             /// <since_tizen> 6 </since_tizen>
1454             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1455             [EditorBrowsable(EditorBrowsableState.Never)]
1456             public Size CheckImageSize
1457             {
1458                 get
1459                 {
1460                     return itemDataAttributes.CheckImageAttributes?.Size;
1461                 }
1462                 set
1463                 {
1464                     CreateCheckImageAttributes();
1465                     itemDataAttributes.CheckImageAttributes.Size = value;
1466                 }
1467             }
1468
1469             /// <summary>
1470             /// DropDown item's check image's right space.
1471             /// </summary>
1472             /// <since_tizen> 6 </since_tizen>
1473             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1474             [EditorBrowsable(EditorBrowsableState.Never)]
1475             public int CheckImageRightSpace
1476             {
1477                 get
1478                 {
1479                     return itemDataAttributes.CheckImageGapToBoundary;
1480                 }
1481                 set
1482                 {
1483                     itemDataAttributes.CheckImageGapToBoundary = value;
1484                 }
1485             }
1486
1487             /// <summary>
1488             /// Flag to decide DropDown item is selected or not.
1489             /// </summary>
1490             /// <since_tizen> 6 </since_tizen>
1491             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1492             [EditorBrowsable(EditorBrowsableState.Never)]
1493             public bool IsSelected
1494             {
1495                 get
1496                 {
1497                     return itemDataAttributes.IsSelected;
1498                 }
1499                 set
1500                 {
1501                     itemDataAttributes.IsSelected = value;
1502                 }
1503             }
1504
1505             private void Initalize()
1506             {
1507                 if (itemDataAttributes == null)
1508                 {
1509                     throw new Exception("Button attribute parse error.");
1510                 }
1511             }
1512
1513             private void CreateTextAttributes()
1514             {
1515                 if(itemDataAttributes.TextAttributes == null)
1516                 {
1517                     itemDataAttributes.TextAttributes = new TextAttributes
1518                     {
1519                         PositionUsesPivotPoint = true,
1520                         ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1521                         PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1522                         WidthResizePolicy = ResizePolicyType.UseNaturalSize,
1523                         HeightResizePolicy = ResizePolicyType.FillToParent,
1524                         VerticalAlignment = VerticalAlignment.Center,
1525                         HorizontalAlignment = HorizontalAlignment.Begin,
1526                     };
1527                 }
1528             }
1529
1530             private void CreateIconAttributes()
1531             {
1532                 if (itemDataAttributes.IconAttributes == null)
1533                 {
1534                     itemDataAttributes.IconAttributes = new ImageAttributes
1535                     {
1536                         PositionUsesPivotPoint = true,
1537                         ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1538                         PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1539                     };
1540                 }
1541             }
1542
1543             private void CreateCheckImageAttributes()
1544             {
1545                 if (itemDataAttributes.CheckImageAttributes == null)
1546                 {
1547                     itemDataAttributes.CheckImageAttributes = new ImageAttributes
1548                     {
1549                         PositionUsesPivotPoint = true,
1550                         ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1551                         PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1552                     };
1553                 }
1554             }
1555         }
1556         #endregion
1557
1558         #region DropDownItemView
1559         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1560         [EditorBrowsable(EditorBrowsableState.Never)]
1561         internal class DropDownItemView : Control
1562         {
1563             private TextLabel mText = null;
1564             private ImageView mIcon = null;
1565             private ImageView mCheck = null;
1566
1567             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1568             [EditorBrowsable(EditorBrowsableState.Never)]
1569             public DropDownItemView() : base()
1570             {
1571             }
1572
1573             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1574             [EditorBrowsable(EditorBrowsableState.Never)]
1575             public ColorSelector BackgroundColorSelector
1576             {
1577                 get;
1578                 set;
1579             }
1580
1581             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1582             [EditorBrowsable(EditorBrowsableState.Never)]
1583             public string Text
1584             {
1585                 get
1586                 {
1587                     if(mText == null)
1588                     {
1589                         return null;
1590                     }
1591                     return mText.Text;
1592                 }
1593                 set
1594                 {
1595                     CreateText();
1596                     mText.Text = value;
1597                 }
1598             }
1599
1600             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1601             [EditorBrowsable(EditorBrowsableState.Never)]
1602             public string FontFamily
1603             {
1604                 get
1605                 {
1606                     if (mText == null)
1607                     {
1608                         return null;
1609                     }
1610                     return mText.FontFamily;
1611                 }
1612                 set
1613                 {
1614                     CreateText();
1615                     mText.FontFamily = value;
1616                 }
1617             }
1618
1619             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1620             [EditorBrowsable(EditorBrowsableState.Never)]
1621             public float PointSize
1622             {
1623                 get
1624                 {
1625                     if (mText == null)
1626                     {
1627                         return 0;
1628                     }
1629                     return mText.PointSize;
1630                 }
1631                 set
1632                 {
1633                     CreateText();
1634                     mText.PointSize = value;
1635                 }
1636             }
1637
1638             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1639             [EditorBrowsable(EditorBrowsableState.Never)]
1640             public Color TextColor
1641             {
1642                 get
1643                 {
1644                     if (mText == null)
1645                     {
1646                         return null;
1647                     }
1648                     return mText.TextColor;
1649                 }
1650                 set
1651                 {
1652                     CreateText();
1653                     mText.TextColor = value;
1654                 }
1655             }
1656
1657             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1658             [EditorBrowsable(EditorBrowsableState.Never)]
1659             public Position TextPosition
1660             {
1661                 get
1662                 {
1663                     if (mText == null)
1664                     {
1665                         return null;
1666                     }
1667                     return mText.Position;
1668                 }
1669                 set
1670                 {
1671                     CreateText();
1672                     mText.Position = value;
1673                 }
1674             }
1675
1676             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1677             [EditorBrowsable(EditorBrowsableState.Never)]
1678             public string IconResourceUrl
1679             {
1680                 get
1681                 {
1682                     if (mIcon == null)
1683                     {
1684                         return null;
1685                     }
1686                     return mIcon.ResourceUrl;
1687                 }
1688                 set
1689                 {
1690                     CreateIcon();
1691                     mIcon.ResourceUrl = value;
1692                 }
1693             }
1694
1695             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1696             [EditorBrowsable(EditorBrowsableState.Never)]
1697             public Size IconSize
1698             {
1699                 get
1700                 {
1701                     if (mIcon == null)
1702                     {
1703                         return null;
1704                     }
1705                     return mIcon.Size;
1706                 }
1707                 set
1708                 {
1709                     CreateIcon();
1710                     mIcon.Size = value;
1711                 }
1712             }
1713
1714             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1715             [EditorBrowsable(EditorBrowsableState.Never)]
1716             public Position IconPosition
1717             {
1718                 get
1719                 {
1720                     if (mIcon == null)
1721                     {
1722                         return null;
1723                     }
1724                     return mIcon.Position;
1725                 }
1726                 set
1727                 {
1728                     CreateIcon();
1729                     mIcon.Position = value;
1730                 }
1731             }
1732
1733             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1734             [EditorBrowsable(EditorBrowsableState.Never)]
1735             public string CheckResourceUrl
1736             {
1737                 get
1738                 {
1739                     if (mCheck == null)
1740                     {
1741                         return null;
1742                     }
1743                     return mCheck.ResourceUrl;
1744                 }
1745                 set
1746                 {
1747                     CreateCheckImage();
1748                     mCheck.ResourceUrl = value;
1749                 }
1750             }
1751
1752             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1753             [EditorBrowsable(EditorBrowsableState.Never)]
1754             public Position CheckPosition
1755             {
1756                 get
1757                 {
1758                     if (mCheck == null)
1759                     {
1760                         return null;
1761                     }
1762                     return mCheck.Position;
1763                 }
1764                 set
1765                 {
1766                     CreateCheckImage();
1767                     mCheck.Position = value;
1768                 }
1769             }
1770
1771             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1772             [EditorBrowsable(EditorBrowsableState.Never)]
1773             public Size CheckImageSize
1774             {
1775                 get
1776                 {
1777                     if (mCheck == null)
1778                     {
1779                         return null;
1780                     }
1781                     return mCheck.Size;
1782                 }
1783                 set
1784                 {
1785                     CreateCheckImage();
1786                     mCheck.Size = value;
1787                 }
1788             }
1789
1790             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1791             [EditorBrowsable(EditorBrowsableState.Never)]
1792             public bool IsSelected
1793             {
1794                 get
1795                 {
1796                     if (mCheck == null)
1797                     {
1798                         return false;
1799                     }
1800                     return mCheck.Visibility;
1801                 }
1802                 set
1803                 {
1804                     CreateCheckImage();
1805                     if(value)
1806                     {
1807                         mCheck.Show();
1808                     }
1809                     else
1810                     {
1811                         mCheck.Hide();
1812                     }
1813                 }
1814             }
1815
1816             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1817             [EditorBrowsable(EditorBrowsableState.Never)]
1818             protected override void Dispose(DisposeTypes type)
1819             {
1820                 if (disposed)
1821                 {
1822                     return;
1823                 }
1824
1825                 if (type == DisposeTypes.Explicit)
1826                 {
1827                     if (mText != null)
1828                     {
1829                         Remove(mText);
1830                         mText.Dispose();
1831                         mText = null;
1832                     }
1833
1834                     if (mIcon != null)
1835                     {
1836                         Remove(mIcon);
1837                         mIcon.Dispose();
1838                         mIcon = null;
1839                     }
1840
1841                     if (mCheck != null)
1842                     {
1843                         Remove(mCheck);
1844                         mCheck.Dispose();
1845                         mCheck = null;
1846                     }
1847                 }
1848                 base.Dispose(type);
1849             }
1850
1851             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1852             [EditorBrowsable(EditorBrowsableState.Never)]
1853             protected override Attributes GetAttributes()
1854             {
1855                 return null;
1856             }
1857
1858             private void CreateIcon()
1859             {
1860                 if(mIcon == null)
1861                 {
1862                     mIcon = new ImageView()
1863                     {
1864                         PositionUsesPivotPoint = true,
1865                         ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1866                         PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1867                     };
1868                     Add(mIcon);
1869                 }
1870             }
1871
1872             private void CreateText()
1873             {
1874                 if (mText == null)
1875                 {
1876                     mText = new TextLabel()
1877                     {
1878                         PositionUsesPivotPoint = true,
1879                         ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1880                         PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1881                         WidthResizePolicy = ResizePolicyType.UseNaturalSize,
1882                         HeightResizePolicy = ResizePolicyType.FillToParent,
1883                         VerticalAlignment = VerticalAlignment.Center,
1884                         HorizontalAlignment = HorizontalAlignment.Begin,
1885                     };
1886                     Add(mText);
1887                 }
1888             }
1889
1890             private void CreateCheckImage()
1891             {
1892                 if (mCheck == null)
1893                 {
1894                     mCheck = new ImageView()
1895                     {
1896                         PositionUsesPivotPoint = true,
1897                         ParentOrigin = Tizen.NUI.ParentOrigin.TopLeft,
1898                         PivotPoint = Tizen.NUI.PivotPoint.TopLeft,
1899                     };
1900                     Add(mCheck);
1901                 }
1902                 mCheck.Hide();
1903             }
1904         }
1905         #endregion
1906
1907         #region DropDownListBridge
1908
1909         /// <summary>
1910         /// DropDownListBridge is bridge to contact item data and item view.
1911         /// </summary>
1912         /// <since_tizen> 6 </since_tizen>
1913         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1914         [EditorBrowsable(EditorBrowsableState.Never)]
1915         public class DropDownListBridge : FlexibleView.Adapter
1916         {
1917             private List<DropDownItemData> mDatas = new List<DropDownItemData>();
1918
1919             /// <summary>
1920             /// Creates a new instance of a DropDownListBridge.
1921             /// </summary>
1922             /// <since_tizen> 6 </since_tizen>
1923             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1924             [EditorBrowsable(EditorBrowsableState.Never)]
1925             public DropDownListBridge()
1926             {
1927             }
1928
1929             /// <summary>
1930             /// Insert data. The inserted data will be added to the special position by index automatically.
1931             /// </summary>
1932             /// <param name="position">Position index where will be inserted.</param>
1933             /// <param name="data">Item data which will apply to tab item view.</param>
1934             /// <since_tizen> 6 </since_tizen>
1935             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1936             [EditorBrowsable(EditorBrowsableState.Never)]
1937             public void InsertData(int position, DropDownItemData data)
1938             {
1939                 if(position == -1)
1940                 {
1941                     position = mDatas.Count;
1942                 }
1943                 mDatas.Insert(position, data);
1944                 NotifyItemInserted(position);
1945             }
1946
1947             /// <summary>
1948             /// Remove data by position.
1949             /// </summary>
1950             /// <param name="position">Position index where will be removed.</param>
1951             /// <since_tizen> 6 </since_tizen>
1952             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1953             [EditorBrowsable(EditorBrowsableState.Never)]
1954             public void RemoveData(int position)
1955             {
1956                 mDatas.RemoveAt(position);
1957                 NotifyItemRemoved(position);
1958             }
1959
1960             /// <summary>
1961             /// Get data by position.
1962             /// </summary>
1963             /// <param name="position">Position index where will be gotten.</param>
1964             /// <since_tizen> 6 </since_tizen>
1965             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1966             [EditorBrowsable(EditorBrowsableState.Never)]
1967             public DropDownItemData GetData(int position)
1968             {
1969                 return mDatas[position];
1970             }
1971
1972             /// <summary>
1973             /// Get view holder by view type.
1974             /// </summary>
1975             /// <param name="viewType">Create item view.</param>
1976             /// <since_tizen> 6 </since_tizen>
1977             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1978             [EditorBrowsable(EditorBrowsableState.Never)]
1979             public override FlexibleView.ViewHolder OnCreateViewHolder(int viewType)
1980             {
1981                 FlexibleView.ViewHolder viewHolder = new FlexibleView.ViewHolder(new DropDownItemView());
1982
1983                 return viewHolder;
1984             }
1985
1986             /// <summary>
1987             /// Binder view holder, it can be override.
1988             /// </summary>
1989             /// <param name="holder">View holder.</param>
1990             /// <param name="position">Position index where will be gotten.</param>
1991             /// <since_tizen> 6 </since_tizen>
1992             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1993             [EditorBrowsable(EditorBrowsableState.Never)]
1994             public override void OnBindViewHolder(FlexibleView.ViewHolder holder, int position)
1995             {
1996                 DropDownItemData listItemData = mDatas[position];
1997                 if(listItemData == null)
1998                 {
1999                     return;
2000                 }
2001                 DropDownItemView listItemView = holder.ItemView as DropDownItemView;
2002                 listItemView.Name = "Item" + position;
2003                 if (listItemData.Size != null)
2004                 {
2005                     holder.ItemView.Size = listItemData.Size;
2006                 }
2007
2008                 if (listItemView != null)
2009                 {
2010                     listItemView.BackgroundColorSelector = listItemData.BackgroundColorSelector;
2011                     if (listItemData.Text != null)
2012                     {
2013                         listItemView.Text = listItemData.Text;
2014                         listItemView.PointSize = listItemData.PointSize;
2015                         listItemView.FontFamily = listItemData.FontFamily;
2016                         listItemView.TextPosition = listItemData.TextPosition;
2017                     }
2018
2019                     if (listItemData.IconResourceUrl != null)
2020                     {
2021                         listItemView.IconResourceUrl = listItemData.IconResourceUrl;
2022                         listItemView.IconSize = listItemData.IconSize;
2023                         if (listItemView.IconSize != null)
2024                         {
2025                             listItemView.IconPosition = new Position(listItemData.IconPosition.X, (listItemView.Size2D.Height - listItemView.IconSize.Height) / 2);
2026                         }
2027                     }
2028
2029                     if (listItemData.CheckImageResourceUrl != null)
2030                     {
2031                         listItemView.CheckResourceUrl = listItemData.CheckImageResourceUrl;
2032                         listItemView.CheckImageSize = listItemData.CheckImageSize;
2033                         if (listItemView.CheckImageSize != null)
2034                         {
2035                             listItemView.CheckPosition = new Position(listItemView.Size2D.Width - listItemData.CheckImageRightSpace - listItemView.CheckImageSize.Width, (listItemView.Size2D.Height - listItemView.CheckImageSize.Height) / 2);
2036                         }
2037                     }
2038
2039                     listItemView.IsSelected = listItemData.IsSelected;
2040                 }
2041             }
2042
2043             /// <summary>
2044             /// Destroy view holder, it can be override.
2045             /// </summary>
2046             /// <param name="holder">View holder.</param>
2047             /// <since_tizen> 6 </since_tizen>
2048             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
2049             [EditorBrowsable(EditorBrowsableState.Never)]
2050             public override void OnDestroyViewHolder(FlexibleView.ViewHolder holder)
2051             {
2052                 if (holder.ItemView != null)
2053                 {
2054                     holder.ItemView.Dispose();
2055                 }
2056             }
2057
2058             /// <summary>
2059             /// Get item count, it can be override.
2060             /// </summary>
2061             /// <since_tizen> 6 </since_tizen>
2062             /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
2063             [EditorBrowsable(EditorBrowsableState.Never)]
2064             public override int GetItemCount()
2065             {
2066                 return mDatas.Count;
2067             }
2068         }
2069         #endregion
2070     }
2071 }