src/XSF/Xamarin.Forms.Core/CheckBox.cs

   1 using System;
   2 using Xamarin.Forms.Platform;
   3
   4 namespace Xamarin.Forms
   5 {
   6         [RenderWith(typeof(_CheckBoxRenderer))]
   7         public class CheckBox : View, IElementConfiguration<CheckBox>, IBorderElement, IColorElement
   8         {
   9                 readonly Lazy<PlatformConfigurationRegistry<CheckBox>> _platformConfigurationRegistry;
  10                 public const string IsCheckedVisualState = "IsChecked";
  11
  12                 public static readonly BindableProperty IsCheckedProperty =
  13                         BindableProperty.Create(nameof(IsChecked), typeof(bool), typeof(CheckBox), false,
  14                                 propertyChanged: (bindable, oldValue, newValue) => {
  15                         ((CheckBox)bindable).CheckedChanged?.Invoke(bindable, new CheckedChangedEventArgs((bool)newValue));
  16                         ((CheckBox)bindable).ChangeVisualState();
  17                 }, defaultBindingMode: BindingMode.TwoWay);
  18
  19                 public static readonly BindableProperty ColorProperty = ColorElement.ColorProperty;
  20
  21                 public Color Color
  22                 {
  23                         get => (Color)GetValue(ColorProperty);
  24                         set => SetValue(ColorProperty, value);
  25                 }
  26
  27
  28                 public CheckBox() => _platformConfigurationRegistry = new Lazy<PlatformConfigurationRegistry<CheckBox>>(() => new PlatformConfigurationRegistry<CheckBox>(this));
  29
  30                 public bool IsChecked
  31                 {
  32                         get => (bool)GetValue(IsCheckedProperty);
  33                         set => SetValue(IsCheckedProperty, value);
  34                 }
  35
  36                 protected internal override void ChangeVisualState()
  37                 {
  38                         if (IsEnabled && IsChecked)
  39                                 VisualStateManager.GoToState(this, IsCheckedVisualState);
  40                         else
  41                                 base.ChangeVisualState();
  42                 }
  43
  44                 public event EventHandler<CheckedChangedEventArgs> CheckedChanged;
  45
  46                 public IPlatformElementConfiguration<T, CheckBox> On<T>() where T : IConfigPlatform
  47                 {
  48                         return _platformConfigurationRegistry.Value.On<T>();
  49                 }
  50
  51                 void IBorderElement.OnBorderColorPropertyChanged(Color oldValue, Color newValue)
  52                 {
  53                 }
  54
  55                 Color IBorderElement.BorderColor => Color.Transparent;
  56                 int IBorderElement.CornerRadius => 0;
  57                 double IBorderElement.BorderWidth => 0;
  58                 int IBorderElement.CornerRadiusDefaultValue => 0;
  59                 Color IBorderElement.BorderColorDefaultValue => Color.Transparent;
  60                 double IBorderElement.BorderWidthDefaultValue => 0;
  61                 bool IBorderElement.IsCornerRadiusSet() => false;
  62                 bool IBorderElement.IsBackgroundColorSet() => IsSet(BackgroundColorProperty);
  63                 bool IBorderElement.IsBorderColorSet() => false;
  64                 bool IBorderElement.IsBorderWidthSet() => false;
  65         }
  66 }