RenderTransform excede tamaño del contenedor (Render Transforma exceed container size)

Cuando estaba utilizando la clase  ScaleTransform para realizar un zoom sobre un control tenia el problema que el control al que hacia zoom sobresalia al tamaño del contenedor.

Ejemplo:

Realizando multiples investigaciones encontre la solucion a este problema :

Utilizar un grid como contenedor del control al que se le hara el zoom , declarando una fila y una columna con Height y Width en auto.

Codigo de ejemplo XAML:

CodeBehind:

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 zoom_user_control
{
    ///

    /// Interaction logic for UserControlToZoom.xaml
    /// 

    public partial class UserControlToZoom : UserControl
    {
        public UserControlToZoom()
        {
            InitializeComponent();
        }

        private void UserControl_MouseWheel(object sender, MouseWheelEventArgs e)
        {
            var delta = (e.Delta / 2000d).ToMultipleOf(0.05d);
            this.MediaElementZoom = Math.Round(this.MediaElementZoom + delta, 2);
        }

        ///

        /// Gets or sets the media element zoom.
        /// 

        ///

        /// Gets or sets the media element zoom.
        /// 

        public double MediaElementZoom
        {
            get
            {
                var m = this.lbl;
                if (m == null) return 1d;

                var transform = m.RenderTransform as ScaleTransform;
                if (transform == null)
                    return 1d;

                return transform.ScaleX == null ? 1d : transform.ScaleX;
            }
            set
            {
                var m = this.lbl;
                if (m == null) return;

                var transform = m.RenderTransform as ScaleTransform;
                if (transform == null)
                {
                    transform = new ScaleTransform(1, 1);

                    m.RenderTransformOrigin = new Point(0.5, 0.5);
                    m.RenderTransform = transform;
                }

                transform.ScaleX = value;
                transform.ScaleY = value;

                if (transform.ScaleX  5)
                {
                    transform.ScaleX = 5;
                    transform.ScaleY = 5;
                }
            }
        }
    }
}

Extentions:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;

namespace zoom_user_control
{
    public static class Extentions
    {
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static double ToMultipleOf(this double value, double multiple)
        {
            var factor = Convert.ToInt32(value / multiple);
            return factor * multiple;
        }
    }
}

Si les sirvio , no olviden comentar 🙂

 

Link de Referencia