VastPark developer zone

using VastPark.Data;

using System.Threading;

using VastPark.Common;

using Plugin.Dialog.Controllers;

namespace Plugin.Dialog.Model

{

    public abstract class DialogBase : IDialog

    {

        public event Event<object> Closed;

        public string Title { get; set; }        

        public string Description { get; set; }

        public IDialogController DialogController { get; private set; }

        public IParkEngine ParkEngine { get; private set; }

        private Thread _StaThread;

        private object _ThreadLock;

        private double _DialogWidth;

        private double _DialogHeight;

        private System.Windows.Window _Dialog;

        public DialogBase(IDialogController dialogController, IParkEngine parkEngine)

        {

            this.DialogController = dialogController;

            this.ParkEngine = parkEngine;

            _ThreadLock = new object();

            _StaThread = new Thread(new ThreadStart(_WpfThread));

            _StaThread.IsBackground = true;

            _StaThread.SetApartmentState(ApartmentState.STA);

            _StaThread.Start();

        }

        private void _WpfThread()

        {

            _Dialog = this.DialogController.CreateWindow(this.ParkEngine.RenderEngine.Handle);

            _DialogWidth = _Dialog.Width;

            _DialogHeight = _Dialog.Height;

            lock (_ThreadLock)

            {

                Monitor.PulseAll(_ThreadLock);

            }

            System.Windows.Threading.Dispatcher.Run();

        }

        public IDialogResult Show()

        {

            lock (_ThreadLock)

            {

                while (_Dialog == null)

                {

                    Monitor.Wait(_ThreadLock);

                }

            }

            //work out the position of the host control

            var host = System.Windows.Forms.Control.FromHandle(this.ParkEngine.RenderEngine.Handle);

            var location = new System.Drawing.Point();

            host.Invoke((ThreadStart)delegate

            {

                location = host.PointToScreen(host.Location);

            }); 

            var left = location.X + this.ParkEngine.RenderEngine.ViewportWidth / 2 - (_DialogWidth / 2);

            var top = location.Y + this.ParkEngine.RenderEngine.ViewportHeight / 2 - (_DialogHeight / 2);

            IDialogResult result = null;

            System.Windows.Threading.Dispatcher.FromThread(_StaThread).Invoke((System.Threading.ThreadStart)delegate

            {

                result = this.DialogController.ShowDialog(this, left, top);

            });

            this.Closed.Raise(this, result);

            return result;

        }

        public void Dispose()

        {

            System.Windows.Threading.Dispatcher.FromThread(_StaThread).InvokeShutdown();

        }

    }

}