src/Tizen.NUI.Components/Controls/Button.cs

   1 /*
   2  * Copyright(c) 2020 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17 using System;
  18 using System.ComponentModel;
  19 using Tizen.NUI.BaseComponents;
  20 using Tizen.NUI.Binding;
  21 using Tizen.NUI.Components.Extension;
  22
  23 namespace Tizen.NUI.Components
  24 {
  25     /// <summary>
  26     /// Button is one kind of common component, a button clearly describes what action will occur when the user selects it.
  27     /// Button may contain text or an icon.
  28     /// </summary>
  29     /// <since_tizen> 6 </since_tizen>
  30     public class Button : Control
  31     {
  32         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  33         [EditorBrowsable(EditorBrowsableState.Never)]
  34         public static readonly BindableProperty IconRelativeOrientationProperty = BindableProperty.Create(nameof(IconRelativeOrientation), typeof(IconOrientation?), typeof(Button), null, propertyChanged: (bindable, oldValue, newValue) =>
  35         {
  36             var instance = (Button)bindable;
  37             if (newValue != null)
  38             {
  39                 instance.privateIconRelativeOrientation = (IconOrientation?)newValue;
  40             }
  41         },
  42         defaultValueCreator: (bindable) =>
  43         {
  44             var instance = (Button)bindable;
  45             return instance.privateIconRelativeOrientation;
  46         });
  47         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  48         [EditorBrowsable(EditorBrowsableState.Never)]
  49         public static readonly BindableProperty IsEnabledProperty = BindableProperty.Create(nameof(IsEnabled), typeof(bool), typeof(Button), true, propertyChanged: (bindable, oldValue, newValue) =>
  50         {
  51             var instance = (Button)bindable;
  52             if (newValue != null)
  53             {
  54                 instance.privateIsEnabled = (bool)newValue;
  55             }
  56         },
  57         defaultValueCreator: (bindable) =>
  58         {
  59             var instance = (Button)bindable;
  60             return instance.privateIsEnabled;
  61         });
  62         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  63         [EditorBrowsable(EditorBrowsableState.Never)]
  64         public static readonly BindableProperty IsSelectedProperty = BindableProperty.Create(nameof(IsSelected), typeof(bool), typeof(Button), true, propertyChanged: (bindable, oldValue, newValue) =>
  65         {
  66             var instance = (Button)bindable;
  67             if (newValue != null)
  68             {
  69                 instance.privateIsSelected = (bool)newValue;
  70             }
  71         },
  72         defaultValueCreator: (bindable) =>
  73         {
  74             var instance = (Button)bindable;
  75             return instance.privateIsSelected;
  76         });
  77         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  78         [EditorBrowsable(EditorBrowsableState.Never)]
  79         public static readonly BindableProperty IsSelectableProperty = BindableProperty.Create(nameof(IsSelectable), typeof(bool), typeof(Button), true, propertyChanged: (bindable, oldValue, newValue) =>
  80         {
  81             var instance = (Button)bindable;
  82             if (newValue != null)
  83             {
  84                 instance.privateIsSelectable = (bool)newValue;
  85             }
  86         },
  87         defaultValueCreator: (bindable) =>
  88         {
  89             var instance = (Button)bindable;
  90             return instance.privateIsSelectable;
  91         });
  92         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
  93         [EditorBrowsable(EditorBrowsableState.Never)]
  94         public static readonly BindableProperty IconPaddingProperty = BindableProperty.Create(nameof(IconPadding), typeof(Extents), typeof(Button), null, propertyChanged: (bindable, oldValue, newValue) =>
  95         {
  96             var instance = (Button)bindable;
  97             if (null != newValue && null != instance.Style?.IconPadding)
  98             {
  99                 instance.Style.IconPadding.CopyFrom((Extents)newValue);
 100                 instance.UpdateUIContent();
 101             }
 102         },
 103         defaultValueCreator: (bindable) =>
 104         {
 105             var instance = (Button)bindable;
 106             return instance.Style?.IconPadding;
 107         });
 108         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
 109         [EditorBrowsable(EditorBrowsableState.Never)]
 110         public static readonly BindableProperty TextPaddingProperty = BindableProperty.Create(nameof(TextPadding), typeof(Extents), typeof(Button), null, propertyChanged: (bindable, oldValue, newValue) =>
 111         {
 112             var instance = (Button)bindable;
 113             if (null != newValue && null != instance.Style?.TextPadding)
 114             {
 115                 instance.Style.TextPadding.CopyFrom((Extents)newValue);
 116                 instance.UpdateUIContent();
 117             }
 118         },
 119         defaultValueCreator: (bindable) =>
 120         {
 121             var instance = (Button)bindable;
 122             return instance.Style?.TextPadding;
 123         });
 124
 125         private ImageView overlayImage;
 126         private TextLabel buttonText;
 127         private ImageView buttonIcon;
 128
 129         private EventHandler<StateChangedEventArgs> stateChangeHander;
 130
 131         private bool isSelected = false;
 132         private bool isEnabled = true;
 133         private bool isPressed = false;
 134
 135         /// <summary>
 136         /// The last touch information triggering selected state change.
 137         /// </summary>
 138         [EditorBrowsable(EditorBrowsableState.Never)]
 139         protected Touch SelectionChangedByTouch { get; set; }
 140
 141         /// <summary>
 142         /// The ButtonExtension instance that is injected by ButtonStyle.
 143         /// </summary>
 144         [EditorBrowsable(EditorBrowsableState.Never)]
 145         protected ButtonExtension Extension { get; set; }
 146
 147         /// <summary>
 148         /// Creates Button's text part.
 149         /// </summary>
 150         /// <return>The created Button's text part.</return>
 151         [EditorBrowsable(EditorBrowsableState.Never)]
 152         protected virtual TextLabel CreateText()
 153         {
 154             return new TextLabel();
 155         }
 156
 157         /// <summary>
 158         /// Creates Button's icon part.
 159         /// </summary>
 160         /// <return>The created Button's icon part.</return>
 161         [EditorBrowsable(EditorBrowsableState.Never)]
 162         protected virtual ImageView CreateIcon()
 163         {
 164             return new ImageView();
 165         }
 166
 167         /// <summary>
 168         /// Creates Button's overlay image part.
 169         /// </summary>
 170         /// <return>The created Button's overlay image part.</return>
 171         [EditorBrowsable(EditorBrowsableState.Never)]
 172         protected virtual ImageView CreateOverlayImage()
 173         {
 174             return new ImageView();
 175         }
 176
 177         /// <summary>
 178         /// Called when the Button is Clicked by a user
 179         /// </summary>
 180         /// <param name="eventArgs">The click information.</param>
 181         [EditorBrowsable(EditorBrowsableState.Never)]
 182         protected virtual void OnClick(ClickEventArgs eventArgs)
 183         {
 184         }
 185
 186         static Button() { }
 187
 188         /// <summary>
 189         /// Creates a new instance of a Button.
 190         /// </summary>
 191         /// <since_tizen> 6 </since_tizen>
 192         public Button() : base()
 193         {
 194             Initialize();
 195         }
 196
 197         /// <summary>
 198         /// Creates a new instance of a Button with style.
 199         /// </summary>
 200         /// <param name="style">Create Button by special style defined in UX.</param>
 201         /// <since_tizen> 8 </since_tizen>
 202         public Button(string style) : base(style)
 203         {
 204             Initialize();
 205         }
 206
 207         /// <summary>
 208         /// Creates a new instance of a Button with style.
 209         /// </summary>
 210         /// <param name="buttonStyle">Create Button by style customized by user.</param>
 211         /// <since_tizen> 8 </since_tizen>
 212         public Button(ButtonStyle buttonStyle) : base(buttonStyle)
 213         {
 214             Initialize();
 215         }
 216
 217         /// <summary>
 218         /// An event for the button clicked signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 219         /// </summary>
 220         /// <since_tizen> 6 </since_tizen>
 221         public event EventHandler<ClickEventArgs> ClickEvent;
 222         /// <summary>
 223         /// An event for the button state changed signal which can be used to subscribe or unsubscribe the event handler provided by the user.<br />
 224         /// </summary>
 225         /// <since_tizen> 6 </since_tizen>
 226         public event EventHandler<StateChangedEventArgs> StateChangedEvent
 227         {
 228             add
 229             {
 230                 stateChangeHander += value;
 231             }
 232             remove
 233             {
 234                 stateChangeHander -= value;
 235             }
 236         }
 237         /// <summary>
 238         /// Icon orientation.
 239         /// </summary>
 240         /// <since_tizen> 6 </since_tizen>
 241         public enum IconOrientation
 242         {
 243             /// <summary>
 244             /// Top.
 245             /// </summary>
 246             /// <since_tizen> 6 </since_tizen>
 247             Top,
 248             /// <summary>
 249             /// Bottom.
 250             /// </summary>
 251             /// <since_tizen> 6 </since_tizen>
 252             Bottom,
 253             /// <summary>
 254             /// Left.
 255             /// </summary>
 256             /// <since_tizen> 6 </since_tizen>
 257             Left,
 258             /// <summary>
 259             /// Right.
 260             /// </summary>
 261             /// <since_tizen> 6 </since_tizen>
 262             Right,
 263         }
 264
 265         /// <summary>
 266         /// Button's icon part.
 267         /// </summary>
 268         [EditorBrowsable(EditorBrowsableState.Never)]
 269         public ImageView ButtonIcon
 270         {
 271             get
 272             {
 273                 if (null == buttonIcon)
 274                 {
 275                     buttonIcon = CreateIcon();
 276                     if (null != Extension)
 277                     {
 278                         buttonIcon = Extension.OnCreateIcon(this, buttonIcon);
 279                     }
 280                     Add(buttonIcon);
 281                     buttonIcon.Relayout += OnIconRelayout;
 282                 }
 283                 return buttonIcon;
 284             }
 285             internal set
 286             {
 287                 buttonIcon = value;
 288             }
 289         }
 290
 291         /// <summary>
 292         /// Button's overlay image part.
 293         /// </summary>
 294         [EditorBrowsable(EditorBrowsableState.Never)]
 295         public ImageView ButtonOverlay
 296         {
 297             get
 298             {
 299                 if (null == overlayImage)
 300                 {
 301                     overlayImage = CreateOverlayImage();
 302                     if (null != Extension)
 303                     {
 304                         overlayImage = Extension.OnCreateOverlayImage(this, overlayImage);
 305                     }
 306                     overlayImage.WidthResizePolicy = ResizePolicyType.FillToParent;
 307                     overlayImage.HeightResizePolicy = ResizePolicyType.FillToParent;
 308                     Add(overlayImage);
 309                 }
 310                 return overlayImage;
 311             }
 312             internal set
 313             {
 314                 overlayImage = value;
 315             }
 316         }
 317
 318         /// <summary>
 319         /// Button's text part.
 320         /// </summary>
 321         [EditorBrowsable(EditorBrowsableState.Never)]
 322         public TextLabel ButtonText
 323         {
 324             get
 325             {
 326                 if (null == buttonText)
 327                 {
 328                     buttonText = CreateText();
 329                     if (null != Extension)
 330                     {
 331                         buttonText = Extension.OnCreateText(this, buttonText);
 332                     }
 333                     buttonText.HorizontalAlignment = HorizontalAlignment.Center;
 334                     buttonText.VerticalAlignment = VerticalAlignment.Center;
 335                     Add(buttonText);
 336                 }
 337                 return buttonText;
 338             }
 339             internal set
 340             {
 341                 buttonText = value;
 342             }
 343         }
 344
 345         /// <summary>
 346         /// Return a copied Style instance of Button
 347         /// </summary>
 348         /// <remarks>
 349         /// It returns copied Style instance and changing it does not effect to the Button.
 350         /// Style setting is possible by using constructor or the function of ApplyStyle(ViewStyle viewStyle)
 351         /// </remarks>
 352         /// <since_tizen> 8 </since_tizen>
 353         public new ButtonStyle Style => ViewStyle as ButtonStyle;
 354
 355         /// <summary>
 356         /// The text of Button.
 357         /// </summary>
 358         /// <since_tizen> 6 </since_tizen>
 359         public string Text
 360         {
 361             get
 362             {
 363                 return Style?.Text?.Text?.GetValue(ControlState);
 364             }
 365             set
 366             {
 367                 if (null != Style?.Text)
 368                 {
 369                     Style.Text.Text = value;
 370                 }
 371             }
 372         }
 373
 374         /// <summary>
 375         /// Flag to decide Button can be selected or not.
 376         /// </summary>
 377         /// <since_tizen> 6 </since_tizen>
 378         public bool IsSelectable
 379         {
 380             get
 381             {
 382                 return (bool)GetValue(IsSelectableProperty);
 383             }
 384             set
 385             {
 386                 SetValue(IsSelectableProperty, value);
 387             }
 388         }
 389
 390         private bool privateIsSelectable
 391         {
 392             get
 393             {
 394                 return Style?.IsSelectable ?? false;
 395             }
 396             set
 397             {
 398                 Style.IsSelectable = value;
 399             }
 400         }
 401
 402         /// <summary>
 403         /// Translate text string in Button.
 404         /// </summary>
 405         /// <since_tizen> 6 </since_tizen>
 406         public string TranslatableText
 407         {
 408             get
 409             {
 410                 return Style?.Text?.TranslatableText?.All;
 411             }
 412             set
 413             {
 414                 if (null != Style?.Text)
 415                 {
 416                     Style.Text.TranslatableText = value;
 417                 }
 418             }
 419         }
 420
 421         /// <summary>
 422         /// Text point size in Button.
 423         /// </summary>
 424         /// <since_tizen> 6 </since_tizen>
 425         public float PointSize
 426         {
 427             get
 428             {
 429                 return Style?.Text?.PointSize?.All ?? 0;
 430             }
 431             set
 432             {
 433                 if (null != Style?.Text)
 434                 {
 435                     Style.Text.PointSize = value;
 436                 }
 437             }
 438         }
 439
 440         /// <summary>
 441         /// Text font family in Button.
 442         /// </summary>
 443         /// <since_tizen> 6 </since_tizen>
 444         public string FontFamily
 445         {
 446             get
 447             {
 448                 return Style?.Text?.FontFamily.All;
 449             }
 450             set
 451             {
 452                 if (null != Style?.Text)
 453                 {
 454                     Style.Text.FontFamily = value;
 455                 }
 456             }
 457         }
 458         /// <summary>
 459         /// Text color in Button.
 460         /// </summary>
 461         /// <since_tizen> 6 </since_tizen>
 462         public Color TextColor
 463         {
 464             get
 465             {
 466                 return Style?.Text?.TextColor?.All;
 467             }
 468             set
 469             {
 470                 if (null != Style?.Text)
 471                 {
 472                     Style.Text.TextColor = value;
 473                 }
 474             }
 475         }
 476         /// <summary>
 477         /// Text horizontal alignment in Button.
 478         /// </summary>
 479         /// <since_tizen> 6 </since_tizen>
 480         public HorizontalAlignment TextAlignment
 481         {
 482             get
 483             {
 484                 return Style?.Text?.HorizontalAlignment ?? HorizontalAlignment.Center;
 485             }
 486             set
 487             {
 488                 if (null != Style?.Text)
 489                 {
 490                     Style.Text.HorizontalAlignment = value;
 491                 }
 492             }
 493         }
 494         /// <summary>
 495         /// Icon image's resource url in Button.
 496         /// </summary>
 497         /// <since_tizen> 6 </since_tizen>
 498         public string IconURL
 499         {
 500             get
 501             {
 502                 return Style?.Icon?.ResourceUrl?.All;
 503             }
 504             set
 505             {
 506                 if (null != Style?.Icon)
 507                 {
 508                     Style.Icon.ResourceUrl = value;
 509                 }
 510             }
 511         }
 512
 513         private StringSelector textSelector = new StringSelector();
 514         /// <summary>
 515         /// Text string selector in Button.
 516         /// </summary>
 517         /// <since_tizen> 6 </since_tizen>
 518         public StringSelector TextSelector
 519         {
 520             get
 521             {
 522                 return textSelector;
 523             }
 524             set
 525             {
 526                 if (value == null || textSelector == null)
 527                 {
 528                     Tizen.Log.Fatal("NUI", "[Exception] Button.TextSelector is null");
 529                     throw new NullReferenceException("Button.TextSelector is null");
 530                 }
 531                 else
 532                 {
 533                     textSelector.Clone(value);
 534                 }
 535             }
 536         }
 537
 538         private StringSelector translatableTextSelector = new StringSelector();
 539         /// <summary>
 540         /// Translateable text string selector in Button.
 541         /// </summary>
 542         /// <since_tizen> 6 </since_tizen>
 543         public StringSelector TranslatableTextSelector
 544         {
 545             get
 546             {
 547                 return translatableTextSelector;
 548             }
 549             set
 550             {
 551                 if (value == null || translatableTextSelector == null)
 552                 {
 553                     Tizen.Log.Fatal("NUI", "[Exception] Button.TranslatableTextSelector is null");
 554                     throw new NullReferenceException("Button.TranslatableTextSelector is null");
 555                 }
 556                 else
 557                 {
 558                     translatableTextSelector.Clone(value);
 559                 }
 560             }
 561         }
 562
 563         private ColorSelector textColorSelector = new ColorSelector();
 564         /// <summary>
 565         /// Text color selector in Button.
 566         /// </summary>
 567         /// <since_tizen> 6 </since_tizen>
 568         public ColorSelector TextColorSelector
 569         {
 570             get
 571             {
 572                 return textColorSelector;
 573             }
 574             set
 575             {
 576                 if (value == null || textColorSelector == null)
 577                 {
 578                     Tizen.Log.Fatal("NUI", "[Exception] Button.textColorSelector is null");
 579                     throw new NullReferenceException("Button.textColorSelector is null");
 580                 }
 581                 else
 582                 {
 583                     textColorSelector.Clone(value);
 584                 }
 585             }
 586         }
 587
 588         private FloatSelector pointSizeSelector = new FloatSelector();
 589         /// <summary>
 590         /// Text font size selector in Button.
 591         /// </summary>
 592         /// <since_tizen> 6 </since_tizen>
 593         public FloatSelector PointSizeSelector
 594         {
 595             get
 596             {
 597                 return pointSizeSelector;
 598             }
 599             set
 600             {
 601                 if (value == null || pointSizeSelector == null)
 602                 {
 603                     Tizen.Log.Fatal("NUI", "[Exception] Button.pointSizeSelector is null");
 604                     throw new NullReferenceException("Button.pointSizeSelector is null");
 605                 }
 606                 else
 607                 {
 608                     pointSizeSelector.Clone(value);
 609                 }
 610             }
 611         }
 612
 613         private StringSelector iconURLSelector = new StringSelector();
 614         /// <summary>
 615         /// Icon image's resource url selector in Button.
 616         /// </summary>
 617         /// <since_tizen> 6 </since_tizen>
 618         public StringSelector IconURLSelector
 619         {
 620             get
 621             {
 622                 return iconURLSelector;
 623             }
 624             set
 625             {
 626                 if (value == null || iconURLSelector == null)
 627                 {
 628                     Tizen.Log.Fatal("NUI", "[Exception] Button.iconURLSelector is null");
 629                     throw new NullReferenceException("Button.iconURLSelector is null");
 630                 }
 631                 else
 632                 {
 633                     iconURLSelector.Clone(value);
 634                 }
 635             }
 636         }
 637
 638         /// <summary>
 639         /// Flag to decide selected state in Button.
 640         /// </summary>
 641         /// <since_tizen> 6 </since_tizen>
 642         public bool IsSelected
 643         {
 644             get
 645             {
 646                 return (bool)GetValue(IsSelectedProperty);
 647             }
 648             set
 649             {
 650                 SetValue(IsSelectedProperty, value);
 651             }
 652         }
 653         private bool privateIsSelected
 654         {
 655             get
 656             {
 657                 return isSelected;
 658             }
 659             set
 660             {
 661                 isSelected = value;
 662
 663                 UpdateState();
 664             }
 665         }
 666
 667         /// <summary>
 668         /// Flag to decide enable or disable in Button.
 669         /// </summary>
 670         /// <since_tizen> 6 </since_tizen>
 671         public bool IsEnabled
 672         {
 673             get
 674             {
 675                 return (bool)GetValue(IsEnabledProperty);
 676             }
 677             set
 678             {
 679                 SetValue(IsEnabledProperty, value);
 680             }
 681         }
 682         private bool privateIsEnabled
 683         {
 684             get
 685             {
 686                 return isEnabled;
 687             }
 688             set
 689             {
 690                 isEnabled = value;
 691                 UpdateState();
 692             }
 693         }
 694
 695         /// <summary>
 696         /// Icon relative orientation in Button, work only when show icon and text.
 697         /// </summary>
 698         /// <since_tizen> 6 </since_tizen>
 699         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 700         [EditorBrowsable(EditorBrowsableState.Never)]
 701         public IconOrientation? IconRelativeOrientation
 702         {
 703             get
 704             {
 705                 return (IconOrientation?)GetValue(IconRelativeOrientationProperty);
 706             }
 707             set
 708             {
 709                 SetValue(IconRelativeOrientationProperty, value);
 710             }
 711         }
 712         private IconOrientation? privateIconRelativeOrientation
 713         {
 714             get
 715             {
 716                 return Style?.IconRelativeOrientation;
 717             }
 718             set
 719             {
 720                 if (Style != null && Style.IconRelativeOrientation != value)
 721                 {
 722                     Style.IconRelativeOrientation = value;
 723                     UpdateUIContent();
 724                 }
 725             }
 726         }
 727
 728         /// <summary>
 729         /// Icon padding in Button, work only when show icon and text.
 730         /// </summary>
 731         /// <since_tizen> 6 </since_tizen>
 732         public Extents IconPadding
 733         {
 734             get => (Extents)GetValue(IconPaddingProperty);
 735             set => SetValue(IconPaddingProperty, value);
 736         }
 737
 738         /// <summary>
 739         /// Text padding in Button, work only when show icon and text.
 740         /// </summary>
 741         /// <since_tizen> 6 </since_tizen>
 742         public Extents TextPadding
 743         {
 744             get => (Extents)GetValue(TextPaddingProperty);
 745             set => SetValue(TextPaddingProperty, value);
 746         }
 747
 748         /// <summary>
 749         /// Dispose Button and all children on it.
 750         /// </summary>
 751         /// <param name="type">Dispose type.</param>
 752         /// <since_tizen> 6 </since_tizen>
 753         protected override void Dispose(DisposeTypes type)
 754         {
 755             if (disposed)
 756             {
 757                 return;
 758             }
 759
 760             if (type == DisposeTypes.Explicit)
 761             {
 762                 Extension?.OnDispose(this);
 763
 764                 if (ButtonIcon != null)
 765                 {
 766                     Utility.Dispose(ButtonIcon);
 767                 }
 768                 if (ButtonText != null)
 769                 {
 770                     Utility.Dispose(ButtonText);
 771                 }
 772                 if (ButtonOverlay != null)
 773                 {
 774                     Utility.Dispose(ButtonOverlay);
 775                 }
 776             }
 777
 778             base.Dispose(type);
 779         }
 780         /// <summary>
 781         /// Called after a key event is received by the view that has had its focus set.
 782         /// </summary>
 783         /// <param name="key">The key event.</param>
 784         /// <returns>True if the key event should be consumed.</returns>
 785         /// <since_tizen> 6 </since_tizen>
 786         public override bool OnKey(Key key)
 787         {
 788             if (null == key) return false;
 789             if (key.State == Key.StateType.Down)
 790             {
 791                 if (key.KeyPressedName == "Return")
 792                 {
 793                     isPressed = true;
 794                     UpdateState();
 795                 }
 796             }
 797             else if (key.State == Key.StateType.Up)
 798             {
 799                 if (key.KeyPressedName == "Return")
 800                 {
 801                     bool clicked = isPressed && isEnabled;
 802
 803                     isPressed = false;
 804
 805                     if (Style.IsSelectable != null && Style.IsSelectable == true)
 806                     {
 807                         IsSelected = !IsSelected;
 808                     }
 809                     else
 810                     {
 811                         UpdateState();
 812                     }
 813
 814                     if (clicked)
 815                     {
 816                         ClickEventArgs eventArgs = new ClickEventArgs();
 817                         OnClickInternal(eventArgs);
 818                     }
 819                 }
 820             }
 821             return base.OnKey(key);
 822         }
 823
 824         /// <summary>
 825         /// Called when the control gain key input focus. Should be overridden by derived classes if they need to customize what happens when the focus is gained.
 826         /// </summary>
 827         /// <since_tizen> 6 </since_tizen>
 828         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 829         [EditorBrowsable(EditorBrowsableState.Never)]
 830         public override void OnFocusGained()
 831         {
 832             base.OnFocusGained();
 833             UpdateState();
 834         }
 835
 836         /// <summary>
 837         /// Called when the control loses key input focus. Should be overridden by derived classes if they need to customize what happens when the focus is lost.
 838         /// </summary>
 839         /// <since_tizen> 6 </since_tizen>
 840         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 841         [EditorBrowsable(EditorBrowsableState.Never)]
 842         public override void OnFocusLost()
 843         {
 844             base.OnFocusLost();
 845             UpdateState();
 846         }
 847
 848         /// <summary>
 849         /// Called after a touch event is received by the owning view.<br />
 850         /// CustomViewBehaviour.REQUIRES_TOUCH_EVENTS must be enabled during construction. See CustomView(ViewWrapperImpl.CustomViewBehaviour behaviour).<br />
 851         /// </summary>
 852         /// <param name="touch">The touch event.</param>
 853         /// <returns>True if the event should be consumed.</returns>
 854         /// <since_tizen> 6 </since_tizen>
 855         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 856         [EditorBrowsable(EditorBrowsableState.Never)]
 857         public override bool OnTouch(Touch touch)
 858         {
 859             if (null == touch) return false;
 860             PointStateType state = touch.GetState(0);
 861
 862             switch (state)
 863             {
 864                 case PointStateType.Down:
 865                     isPressed = true;
 866                     Extension?.SetTouchInfo(touch);
 867                     UpdateState();
 868                     return true;
 869                 case PointStateType.Interrupted:
 870                     isPressed = false;
 871                     UpdateState();
 872                     return true;
 873                 case PointStateType.Up:
 874                     {
 875                         bool clicked = isPressed && isEnabled;
 876
 877                         isPressed = false;
 878
 879                         if (Style.IsSelectable != null && Style.IsSelectable == true)
 880                         {
 881                             Extension?.SetTouchInfo(touch);
 882                             IsSelected = !IsSelected;
 883                         }
 884                         else
 885                         {
 886                             Extension?.SetTouchInfo(touch);
 887                             UpdateState();
 888                         }
 889
 890                         if (clicked)
 891                         {
 892                             ClickEventArgs eventArgs = new ClickEventArgs();
 893                             OnClickInternal(eventArgs);
 894                         }
 895
 896                         return true;
 897                     }
 898                 default:
 899                     break;
 900             }
 901             return base.OnTouch(touch);
 902         }
 903
 904         /// <summary>
 905         /// Apply style to button.
 906         /// </summary>
 907         /// <param name="viewStyle">The style to apply.</param>
 908         /// <since_tizen> 8 </since_tizen>
 909         public override void ApplyStyle(ViewStyle viewStyle)
 910         {
 911             base.ApplyStyle(viewStyle);
 912
 913             ButtonStyle buttonStyle = viewStyle as ButtonStyle;
 914             if (null != buttonStyle)
 915             {
 916                 Extension = buttonStyle.CreateExtension();
 917                 if (buttonStyle.Overlay != null)
 918                 {
 919                     ButtonOverlay?.ApplyStyle(buttonStyle.Overlay);
 920                 }
 921
 922                 if (buttonStyle.Text != null)
 923                 {
 924                     ButtonText?.ApplyStyle(buttonStyle.Text);
 925                 }
 926
 927                 if (buttonStyle.Icon != null)
 928                 {
 929                     ButtonIcon?.ApplyStyle(buttonStyle.Icon);
 930                 }
 931             }
 932         }
 933
 934         /// <summary>
 935         /// Get Button style.
 936         /// </summary>
 937         /// <returns>The default button style.</returns>
 938         /// <since_tizen> 8 </since_tizen>
 939         protected override ViewStyle CreateViewStyle()
 940         {
 941             return new ButtonStyle();
 942         }
 943
 944         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 945         [EditorBrowsable(EditorBrowsableState.Never)]
 946         protected override void OnUpdate()
 947         {
 948             base.OnUpdate();
 949             UpdateUIContent();
 950
 951             Extension?.OnRelayout(this);
 952         }
 953
 954         /// <summary>
 955         /// Update Button State.
 956         /// </summary>
 957         /// <param name="touchInfo">The touch information in case the state has changed by touching.</param>
 958         /// <since_tizen> 6 </since_tizen>
 959         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
 960         [EditorBrowsable(EditorBrowsableState.Never)]
 961         protected void UpdateState()
 962         {
 963             ControlStates sourceState = ControlState;
 964             ControlStates targetState;
 965
 966             if (isEnabled)
 967             {
 968                 if (isPressed)
 969                 {
 970                     // Pressed
 971                     targetState = ControlStates.Pressed;
 972                 }
 973                 else
 974                 {
 975                     // Normal
 976                     targetState = ControlStates.Normal;
 977
 978                     // Selected
 979                     targetState |= (IsSelected ? ControlStates.Selected : 0);
 980
 981                     // Focused, SelectedFocused
 982                     targetState |= (IsFocused ? ControlStates.Focused : 0);
 983                 }
 984             }
 985             else
 986             {
 987                 // Disabled
 988                 targetState = ControlStates.Disabled;
 989
 990                 // DisabledSelected, DisabledFocused
 991                 targetState |= (IsSelected ? ControlStates.Selected : (IsFocused ? ControlStates.Focused : 0));
 992             }
 993
 994             if (sourceState != targetState)
 995             {
 996                 ControlState = targetState;
 997
 998                 OnUpdate();
 999
1000                 StateChangedEventArgs e = new StateChangedEventArgs
1001                 {
1002                     PreviousState = sourceState,
1003                     CurrentState = targetState
1004                 };
1005                 stateChangeHander?.Invoke(this, e);
1006
1007                 Extension?.OnControlStateChanged(this, new ControlStateChangedEventArgs(sourceState, targetState));
1008             }
1009         }
1010
1011         /// <summary>
1012         /// It is hijack by using protected, style copy problem when class inherited from Button.
1013         /// </summary>
1014         /// <since_tizen> 6 </since_tizen>
1015         private void Initialize()
1016         {
1017             var style = (ButtonStyle)Style;
1018             EnableControlStatePropagation = true;
1019             UpdateState();
1020             LayoutDirectionChanged += OnLayoutDirectionChanged;
1021         }
1022
1023         /// <summary>
1024         /// Measure text, it can be override.
1025         /// </summary>
1026         /// <since_tizen> 6 </since_tizen>
1027         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1028         [EditorBrowsable(EditorBrowsableState.Never)]
1029         protected virtual void MeasureText()
1030         {
1031             if (Style.IconRelativeOrientation == null || ButtonIcon == null || ButtonText == null)
1032             {
1033                 return;
1034             }
1035             ButtonText.WidthResizePolicy = ResizePolicyType.Fixed;
1036             ButtonText.HeightResizePolicy = ResizePolicyType.Fixed;
1037             int textPaddingStart = Style.TextPadding.Start;
1038             int textPaddingEnd = Style.TextPadding.End;
1039             int textPaddingTop = Style.TextPadding.Top;
1040             int textPaddingBottom = Style.TextPadding.Bottom;
1041
1042             int iconPaddingStart = Style.IconPadding.Start;
1043             int iconPaddingEnd = Style.IconPadding.End;
1044             int iconPaddingTop = Style.IconPadding.Top;
1045             int iconPaddingBottom = Style.IconPadding.Bottom;
1046
1047             if (IconRelativeOrientation == IconOrientation.Top || IconRelativeOrientation == IconOrientation.Bottom)
1048             {
1049                 ButtonText.SizeWidth = SizeWidth - textPaddingStart - textPaddingEnd;
1050                 ButtonText.SizeHeight = SizeHeight - textPaddingTop - textPaddingBottom - iconPaddingTop - iconPaddingBottom - ButtonIcon.SizeHeight;
1051             }
1052             else
1053             {
1054                 ButtonText.SizeWidth = SizeWidth - textPaddingStart - textPaddingEnd - iconPaddingStart - iconPaddingEnd - ButtonIcon.SizeWidth;
1055                 ButtonText.SizeHeight = SizeHeight - textPaddingTop - textPaddingBottom;
1056             }
1057         }
1058         /// <summary>
1059         /// Layout child, it can be override.
1060         /// </summary>
1061         /// <since_tizen> 6 </since_tizen>
1062         /// This will be public opened in tizen_5.5 after ACR done. Before ACR, need to be hidden as inhouse API.
1063         [EditorBrowsable(EditorBrowsableState.Never)]
1064         protected virtual void LayoutChild()
1065         {
1066             if (Style.IconRelativeOrientation == null || ButtonIcon == null || ButtonText == null)
1067             {
1068                 return;
1069             }
1070
1071             var buttonIcon = ButtonIcon;
1072             var buttonText = ButtonText;
1073
1074             int textPaddingStart = Style.TextPadding.Start;
1075             int textPaddingEnd = Style.TextPadding.End;
1076             int textPaddingTop = Style.TextPadding.Top;
1077             int textPaddingBottom = Style.TextPadding.Bottom;
1078
1079             int iconPaddingStart = Style.IconPadding.Start;
1080             int iconPaddingEnd = Style.IconPadding.End;
1081             int iconPaddingTop = Style.IconPadding.Top;
1082             int iconPaddingBottom = Style.IconPadding.Bottom;
1083
1084             switch (IconRelativeOrientation)
1085             {
1086                 case IconOrientation.Top:
1087                     buttonIcon.PositionUsesPivotPoint = true;
1088                     buttonIcon.ParentOrigin = NUI.ParentOrigin.TopCenter;
1089                     buttonIcon.PivotPoint = NUI.PivotPoint.TopCenter;
1090                     buttonIcon.Position2D = new Position2D(0, iconPaddingTop);
1091
1092                     buttonText.PositionUsesPivotPoint = true;
1093                     buttonText.ParentOrigin = NUI.ParentOrigin.BottomCenter;
1094                     buttonText.PivotPoint = NUI.PivotPoint.BottomCenter;
1095                     buttonText.Position2D = new Position2D(0, -textPaddingBottom);
1096                     break;
1097                 case IconOrientation.Bottom:
1098                     buttonIcon.PositionUsesPivotPoint = true;
1099                     buttonIcon.ParentOrigin = NUI.ParentOrigin.BottomCenter;
1100                     buttonIcon.PivotPoint = NUI.PivotPoint.BottomCenter;
1101                     buttonIcon.Position2D = new Position2D(0, -iconPaddingBottom);
1102
1103                     buttonText.PositionUsesPivotPoint = true;
1104                     buttonText.ParentOrigin = NUI.ParentOrigin.TopCenter;
1105                     buttonText.PivotPoint = NUI.PivotPoint.TopCenter;
1106                     buttonText.Position2D = new Position2D(0, textPaddingTop);
1107                     break;
1108                 case IconOrientation.Left:
1109                     if (LayoutDirection == ViewLayoutDirectionType.LTR)
1110                     {
1111                         buttonIcon.PositionUsesPivotPoint = true;
1112                         buttonIcon.ParentOrigin = NUI.ParentOrigin.CenterLeft;
1113                         buttonIcon.PivotPoint = NUI.PivotPoint.CenterLeft;
1114                         buttonIcon.Position2D = new Position2D(iconPaddingStart, 0);
1115
1116                         buttonText.PositionUsesPivotPoint = true;
1117                         buttonText.ParentOrigin = NUI.ParentOrigin.CenterRight;
1118                         buttonText.PivotPoint = NUI.PivotPoint.CenterRight;
1119                         buttonText.Position2D = new Position2D(-textPaddingEnd, 0);
1120                     }
1121                     else
1122                     {
1123                         buttonIcon.PositionUsesPivotPoint = true;
1124                         buttonIcon.ParentOrigin = NUI.ParentOrigin.CenterRight;
1125                         buttonIcon.PivotPoint = NUI.PivotPoint.CenterRight;
1126                         buttonIcon.Position2D = new Position2D(-iconPaddingStart, 0);
1127
1128                         buttonText.PositionUsesPivotPoint = true;
1129                         buttonText.ParentOrigin = NUI.ParentOrigin.CenterLeft;
1130                         buttonText.PivotPoint = NUI.PivotPoint.CenterLeft;
1131                         buttonText.Position2D = new Position2D(textPaddingEnd, 0);
1132                     }
1133
1134                     break;
1135                 case IconOrientation.Right:
1136                     if (LayoutDirection == ViewLayoutDirectionType.RTL)
1137                     {
1138                         buttonIcon.PositionUsesPivotPoint = true;
1139                         buttonIcon.ParentOrigin = NUI.ParentOrigin.CenterLeft;
1140                         buttonIcon.PivotPoint = NUI.PivotPoint.CenterLeft;
1141                         buttonIcon.Position2D = new Position2D(iconPaddingEnd, 0);
1142
1143                         buttonText.PositionUsesPivotPoint = true;
1144                         buttonText.ParentOrigin = NUI.ParentOrigin.CenterRight;
1145                         buttonText.PivotPoint = NUI.PivotPoint.CenterRight;
1146                         buttonText.Position2D = new Position2D(-textPaddingStart, 0);
1147                     }
1148                     else
1149                     {
1150                         buttonIcon.PositionUsesPivotPoint = true;
1151                         buttonIcon.ParentOrigin = NUI.ParentOrigin.CenterRight;
1152                         buttonIcon.PivotPoint = NUI.PivotPoint.CenterRight;
1153                         buttonIcon.Position2D = new Position2D(-iconPaddingEnd, 0);
1154
1155                         buttonText.PositionUsesPivotPoint = true;
1156                         buttonText.ParentOrigin = NUI.ParentOrigin.CenterLeft;
1157                         buttonText.PivotPoint = NUI.PivotPoint.CenterLeft;
1158                         buttonText.Position2D = new Position2D(textPaddingStart, 0);
1159                     }
1160                     break;
1161                 default:
1162                     break;
1163             }
1164             if (string.IsNullOrEmpty(buttonText.Text))
1165             {
1166                 buttonIcon.ParentOrigin = NUI.ParentOrigin.Center;
1167                 buttonIcon.PivotPoint = NUI.PivotPoint.Center;
1168             }
1169         }
1170         /// <summary>
1171         /// Theme change callback when theme is changed, this callback will be trigger.
1172         /// </summary>
1173         /// <param name="sender">The sender</param>
1174         /// <param name="e">The event data</param>
1175         /// <since_tizen> 8 </since_tizen>
1176         protected override void OnThemeChangedEvent(object sender, StyleManager.ThemeChangeEventArgs e)
1177         {
1178             ButtonStyle buttonStyle = StyleManager.Instance.GetViewStyle(style) as ButtonStyle;
1179             if (buttonStyle != null)
1180             {
1181                 Style.CopyFrom(buttonStyle);
1182                 UpdateUIContent();
1183             }
1184         }
1185
1186         private void UpdateUIContent()
1187         {
1188             MeasureText();
1189             LayoutChild();
1190
1191             Sensitive = isEnabled;
1192         }
1193
1194         private void OnLayoutDirectionChanged(object sender, LayoutDirectionChangedEventArgs e)
1195         {
1196             MeasureText();
1197             LayoutChild();
1198         }
1199
1200         private void OnClickInternal(ClickEventArgs eventArgs)
1201         {
1202             OnClick(eventArgs);
1203             Extension?.OnClick(this, eventArgs);
1204             ClickEvent?.Invoke(this, eventArgs);
1205         }
1206
1207         private void OnIconRelayout(object sender, EventArgs e)
1208         {
1209             MeasureText();
1210             LayoutChild();
1211         }
1212
1213         /// <summary>
1214         /// ClickEventArgs is a class to record button click event arguments which will sent to user.
1215         /// </summary>
1216         /// <since_tizen> 6 </since_tizen>
1217         public class ClickEventArgs : EventArgs
1218         {
1219         }
1220         /// <summary>
1221         /// StateChangeEventArgs is a class to record button state change event arguments which will sent to user.
1222         /// </summary>
1223         /// <since_tizen> 6 </since_tizen>
1224         public class StateChangedEventArgs : EventArgs
1225         {
1226             /// <summary> previous state of Button </summary>
1227             /// <since_tizen> 6 </since_tizen>
1228             public ControlStates PreviousState;
1229             /// <summary> current state of Button </summary>
1230             /// <since_tizen> 6 </since_tizen>
1231             public ControlStates CurrentState;
1232         }
1233
1234         /// <summary>
1235         /// Get current text part to the attached ButtonExtension.
1236         /// </summary>
1237         /// <remarks>
1238         /// It returns null if the passed extension is invaild.
1239         /// </remarks>
1240         /// <param name="extension">The extension instance that is currently attached to this Button.</param>
1241         /// <return>The button's text part.</return>
1242         [EditorBrowsable(EditorBrowsableState.Never)]
1243         public TextLabel GetCurrentText(ButtonExtension extension)
1244         {
1245             return (extension == Extension) ? ButtonText : null;
1246         }
1247
1248         /// <summary>
1249         /// Get current icon part to the attached ButtonExtension.
1250         /// </summary>
1251         /// <remarks>
1252         /// It returns null if the passed extension is invaild.
1253         /// </remarks>
1254         /// <param name="extension">The extension instance that is currently attached to this Button.</param>
1255         /// <return>The button's icon part.</return>
1256         [EditorBrowsable(EditorBrowsableState.Never)]
1257         public ImageView GetCurrentIcon(ButtonExtension extension)
1258         {
1259             return (extension == Extension) ? ButtonIcon : null;
1260         }
1261
1262         /// <summary>
1263         /// Get current overlay image part to the attached ButtonExtension.
1264         /// </summary>
1265         /// <remarks>
1266         /// It returns null if the passed extension is invaild.
1267         /// </remarks>
1268         /// <param name="extension">The extension instance that is currently attached to this Button.</param>
1269         /// <return>The button's overlay image part.</return>
1270         [EditorBrowsable(EditorBrowsableState.Never)]
1271         public ImageView GetCurrentOverlayImage(ButtonExtension extension)
1272         {
1273             return (extension == Extension) ? ButtonOverlay : null;
1274         }
1275     }
1276 }