CtrEditor/ObjetosSim/UserControls/ThreeLinesControl.xaml.cs

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

namespace CtrEditor.ObjetosSim.UserControls
{
    /// <summary>
    /// Interaction logic for ThreeLinesControl.xaml
    /// </summary>
    public partial class ThreeLinesControl : UserControl
    {
        public ThreeLinesControl()
        {
            InitializeComponent();
            this.Loaded += ThreeLinesControl_Loaded;
        }

        private void ThreeLinesControl_Loaded(object sender, RoutedEventArgs e)
        {
            CreateRectangles();
        }

        public double AnchoRecto
        {
            get { return (double)GetValue(AnchoRectoProperty); }
            set { SetValue(AnchoRectoProperty, value); }
        }

        public static readonly DependencyProperty AnchoRectoProperty =
            DependencyProperty.Register("AnchoRecto", typeof(double), typeof(ThreeLinesControl), new PropertyMetadata(100.0, OnDimensionsChanged));

        public double AnchoCentro
        {
            get { return (double)GetValue(AnchoCentroProperty); }
            set { SetValue(AnchoCentroProperty, value); }
        }

        public static readonly DependencyProperty AnchoCentroProperty =
            DependencyProperty.Register("AnchoCentro", typeof(double), typeof(ThreeLinesControl), new PropertyMetadata(100.0, OnDimensionsChanged));

        public double Altura
        {
            get { return (double)GetValue(AlturaProperty); }
            set { SetValue(AlturaProperty, value); }
        }

        public static readonly DependencyProperty AlturaProperty =
            DependencyProperty.Register("Altura", typeof(double), typeof(ThreeLinesControl), new PropertyMetadata(100.0, OnDimensionsChanged));

        public double AltoGuia
        {
            get { return (double)GetValue(AltoGuiaProperty); }
            set { SetValue(AltoGuiaProperty, value); }
        }

        public static readonly DependencyProperty AltoGuiaProperty =
            DependencyProperty.Register("AltoGuia", typeof(double), typeof(ThreeLinesControl), new PropertyMetadata(10.0, OnDimensionsChanged));

        private static void OnDimensionsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var control = d as ThreeLinesControl;
            control?.CreateRectangles();
        }

        private void CreateRectangles()
        {
            Canvas.Children.Clear();

            // Crear Liz
            var liz = new Rectangle
            {
                Width = AnchoRecto,
                Height = AltoGuia,
                Fill = Brushes.Blue
            };
            Canvas.SetLeft(liz, 0);
            Canvas.SetTop(liz, -AltoGuia / 2);
            Canvas.Children.Add(liz);

            // Calcular la hipotenusa para Lc
            double lcWidth = Math.Sqrt(Math.Pow(AnchoCentro, 2) + Math.Pow(Altura, 2));

            // Crear Lc
            var lc = new Rectangle
            {
                Width = lcWidth,
                Height = AltoGuia,
                Fill = Brushes.Red,
                RenderTransformOrigin = new Point(0, 0.5)
            };
            lc.RenderTransform = new RotateTransform(GetRotationAngle(AnchoCentro, Altura));
            Canvas.SetLeft(lc, AnchoRecto);
            Canvas.SetTop(lc, -AltoGuia / 2);
            Canvas.Children.Add(lc);

            // Crear Lde
            var lde = new Rectangle
            {
                Width = AnchoRecto,
                Height = AltoGuia,
                Fill = Brushes.Green
            };
            Canvas.SetLeft(lde, AnchoRecto + AnchoCentro);
            Canvas.SetTop(lde, Altura - AltoGuia / 2);
            Canvas.Children.Add(lde);
        }


        private double GetRotationAngle(double anchoCentro, double altura)
        {
            return Math.Atan2(altura, anchoCentro) * 180 / Math.PI;
        }
    }
}