Code behind

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 TestZaMapu
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            TranslationFactorX = 0;
            TranslationFactorY = 0;
            isPanning = false;

        }

        private Point ptOldPosition;
        private bool isPanning;

        public static readonly DependencyProperty TranslateX =
            DependencyProperty.Register("TranslationFactorX", typeof(double), typeof(MainWindow));

        public static readonly DependencyProperty TranslateY =
            DependencyProperty.Register("TranslationFactorY", typeof(double), typeof(MainWindow));

        public double TranslationFactorX
        {
            get { return (double)GetValue(TranslateX); }
            set { SetValue(TranslateX, value); }
        }

        public double TranslationFactorY
        {
            get { return (double)GetValue(TranslateY); }
            set { SetValue(TranslateY, value); }
        }

        private void GlavniProzor_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            base.OnMouseLeftButtonDown(e);
            if (isPanning)
                return;
            isPanning = this.CaptureMouse();
            ptOldPosition = e.GetPosition(this);
        }

        private void GlavniProzor_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            base.OnMouseLeftButtonUp(e);

            if (this.IsMouseCaptured)
            {
                this.ReleaseMouseCapture();
                isPanning = false;
            }
        }

        private void GlavniProzor_MouseMove(object sender, MouseEventArgs e)
        {
            base.OnMouseMove(e);

            if (isPanning)
            {
                Point ptNewPosition = e.GetPosition(this);

                if (ptNewPosition != ptOldPosition)
                {
                    Vector direction = ptOldPosition - ptNewPosition;

                    direction.X = TranslationFactorX - direction.X;
                    direction.Y = TranslationFactorY - direction.Y;

                    TranslationFactorX = direction.X;
                    TranslationFactorY = direction.Y;

                    ptOldPosition = ptNewPosition;
                }
            }
        }

        private void GlavniProzor_LostMouseCapture(object sender, MouseEventArgs e)
        {
            isPanning = false;
            this.OnLostMouseCapture(e);
        }
    }
}