HandyControl/HandyControl/Controls/Loading/LoadingBase.cs

using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using HandyControl.Data;

// ReSharper disable once CheckNamespace
namespace HandyControl.Controls
{
    public abstract class LoadingBase : ContentControl
    {
        protected Storyboard Storyboard;

        public static readonly DependencyProperty IsRunningProperty = DependencyProperty.Register(
            "IsRunning", typeof(bool), typeof(LoadingBase), new PropertyMetadata(ValueBoxes.TrueBox, (o, args) =>
            {
                var ctl = (LoadingBase) o;
                var v = (bool) args.NewValue;
                if (v)
                {
                    ctl.Storyboard?.Resume();
                }
                else
                {
                    ctl.Storyboard?.Pause();
                }
            }));

        public bool IsRunning
        {
            get => (bool) GetValue(IsRunningProperty);
            set => SetValue(IsRunningProperty, value);
        }

        public static readonly DependencyProperty DotCountProperty = DependencyProperty.Register(
            "DotCount", typeof(int), typeof(LoadingBase),
            new FrameworkPropertyMetadata(5, FrameworkPropertyMetadataOptions.AffectsRender));

        public static readonly DependencyProperty DotIntervalProperty = DependencyProperty.Register(
            "DotInterval", typeof(double), typeof(LoadingBase),
            new FrameworkPropertyMetadata(10.0, FrameworkPropertyMetadataOptions.AffectsRender));

        public static readonly DependencyProperty DotBorderBrushProperty = DependencyProperty.Register(
            "DotBorderBrush", typeof(Brush), typeof(LoadingBase),
            new FrameworkPropertyMetadata(default(Brush), FrameworkPropertyMetadataOptions.AffectsRender));

        public static readonly DependencyProperty DotBorderThicknessProperty = DependencyProperty.Register(
            "DotBorderThickness", typeof(double), typeof(LoadingBase),
            new FrameworkPropertyMetadata(ValueBoxes.Double0Box, FrameworkPropertyMetadataOptions.AffectsRender));

        public static readonly DependencyProperty DotDiameterProperty = DependencyProperty.Register(
            "DotDiameter", typeof(double), typeof(LoadingBase),
            new FrameworkPropertyMetadata(6.0, FrameworkPropertyMetadataOptions.AffectsRender));

        public static readonly DependencyProperty DotSpeedProperty = DependencyProperty.Register(
            "DotSpeed", typeof(double), typeof(LoadingBase),
            new FrameworkPropertyMetadata(4.0, FrameworkPropertyMetadataOptions.AffectsRender));

        public static readonly DependencyProperty DotDelayTimeProperty = DependencyProperty.Register(
            "DotDelayTime", typeof(double), typeof(LoadingBase),
            new FrameworkPropertyMetadata(80.0, FrameworkPropertyMetadataOptions.AffectsRender));

        protected readonly Canvas PrivateCanvas = new Canvas
        {
            ClipToBounds = true
        };

        protected LoadingBase()
        {
            Content = PrivateCanvas;
        }

        public int DotCount
        {
            get => (int) GetValue(DotCountProperty);
            set => SetValue(DotCountProperty, value);
        }

        public double DotInterval
        {
            get => (double) GetValue(DotIntervalProperty);
            set => SetValue(DotIntervalProperty, value);
        }

        public Brush DotBorderBrush
        {
            get => (Brush) GetValue(DotBorderBrushProperty);
            set => SetValue(DotBorderBrushProperty, value);
        }

        public double DotBorderThickness
        {
            get => (double) GetValue(DotBorderThicknessProperty);
            set => SetValue(DotBorderThicknessProperty, value);
        }

        public double DotDiameter
        {
            get => (double) GetValue(DotDiameterProperty);
            set => SetValue(DotDiameterProperty, value);
        }

        public double DotSpeed
        {
            get => (double) GetValue(DotSpeedProperty);
            set => SetValue(DotSpeedProperty, value);
        }

        public double DotDelayTime
        {
            get => (double) GetValue(DotDelayTimeProperty);
            set => SetValue(DotDelayTimeProperty, value);
        }

        protected abstract void UpdateDots();

        protected override void OnRender(DrawingContext drawingContext)
        {
            base.OnRender(drawingContext);
            UpdateDots();
        }

        protected Ellipse CreateEllipse(int index)
        {
            var ellipse = new Ellipse();
            ellipse.SetBinding(WidthProperty, new Binding(DotDiameterProperty.Name) {Source = this});
            ellipse.SetBinding(HeightProperty, new Binding(DotDiameterProperty.Name) {Source = this});
            ellipse.SetBinding(Shape.FillProperty, new Binding(ForegroundProperty.Name) {Source = this});
            ellipse.SetBinding(Shape.StrokeThicknessProperty, new Binding(DotBorderThicknessProperty.Name) {Source = this});
            ellipse.SetBinding(Shape.StrokeProperty, new Binding(DotBorderBrushProperty.Name) {Source = this});
            return ellipse;
        }
    }
}