packages/MaterialDesignThemes.2.5.0.1205/src/net45/RatingBar.cs

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using System.Collections.ObjectModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;

namespace MaterialDesignThemes.Wpf
{
    /// <summary>
    /// A custom control implementing a rating bar.
    /// The icon aka content may be set as a DataTemplate via the ButtonContentTemplate property.
    /// </summary>
    public class RatingBar : Control
    {
        public static RoutedCommand SelectRatingCommand = new RoutedCommand();

        static RatingBar()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(RatingBar), new FrameworkPropertyMetadata(typeof(RatingBar)));
        }
                
        private readonly ObservableCollection<RatingBarButton> _ratingButtonsInternal = new ObservableCollection<RatingBarButton>();
        private readonly ReadOnlyObservableCollection<RatingBarButton> _ratingButtons;

        public RatingBar()
        {
            CommandBindings.Add(new CommandBinding(SelectRatingCommand, SelectItemHandler));
            _ratingButtons = new ReadOnlyObservableCollection<RatingBarButton>(_ratingButtonsInternal);
        }

        private void SelectItemHandler(object sender, ExecutedRoutedEventArgs executedRoutedEventArgs)
        {
            if (executedRoutedEventArgs.Parameter is int)
                Value = (int) executedRoutedEventArgs.Parameter;
        }

        public static readonly DependencyProperty MinProperty = DependencyProperty.Register(
            nameof(Min), typeof (int), typeof (RatingBar), new PropertyMetadata(1, MinPropertyChangedCallback));

        public int Min
        {
            get { return (int) GetValue(MinProperty); }
            set { SetValue(MinProperty, value); }
        }

        public static readonly DependencyProperty MaxProperty = DependencyProperty.Register(
            nameof(Max), typeof (int), typeof (RatingBar), new PropertyMetadata(5, MaxPropertyChangedCallback));

        public int Max
        {
            get { return (int) GetValue(MaxProperty); }
            set { SetValue(MaxProperty, value); }
        }

        public static readonly DependencyProperty ValueProperty = DependencyProperty.Register(
            nameof(Value), typeof (int), typeof (RatingBar), new PropertyMetadata(0, ValuePropertyChangedCallback));

        private static void ValuePropertyChangedCallback(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
        {
            var ratingBar = (RatingBar)dependencyObject;
            foreach (var button in ratingBar.RatingButtons)