using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Tango.Touch.Controls
{
    public class TouchRingProgress : ProgressBar
    {
        private SharedUI.Shapes.Arc _arc;

        public double RingThickness
        {
            get { return (double)GetValue(RingThicknessProperty); }
            set { SetValue(RingThicknessProperty, value); }
        }
        public static readonly DependencyProperty RingThicknessProperty =
            DependencyProperty.Register("RingThickness", typeof(double), typeof(TouchRingProgress), new PropertyMetadata(3.0));

        static TouchRingProgress()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(TouchRingProgress), new FrameworkPropertyMetadata(typeof(TouchRingProgress)));
        }

        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
            _arc = GetTemplateChild("PART_Arc") as SharedUI.Shapes.Arc;
            SetArc();
        }

        protected override void OnValueChanged(double oldValue, double newValue)
        {
            base.OnValueChanged(oldValue, newValue);
            SetArc();
        }

        protected override void OnMaximumChanged(double oldMaximum, double newMaximum)
        {
            base.OnMaximumChanged(oldMaximum, newMaximum);
            SetArc();
        }

        private void SetArc()
        {
            if (_arc != null)
            {
                _arc.StartAngle = 359.999 * (Minimum / (Maximum - Minimum));
                _arc.EndAngle = 359.999 * (Value / (Maximum - Minimum));
            }
        }
    }
}