Unwrapper: PreviewScreen

using System;
using System.Collections.Generic;
using System.ComponentModel;
using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.CommandWpf;
using Unwrapper.Elements;
using Unwrapper.PreviewScreen;
using Unwrapper.View;

namespace Unwrapper.ViewModel
{
    public class PreviewScreenViewModel : ViewModelBase
    {

        private double _renderSize=double.NaN;

        public double RenderSize
        {
            get { return _renderSize; }
            set
            {
                   _renderSize = value;
                   RaisePropertyChanged(() => RenderSize);
            }
        }

        public RelayCommand ChangeRenderSizeCommand { get; set; }
        public RelayCommand RenderCommand { get; set; }
        public RelayCommand ResetRenderSizeCommand { get; set; }
        public RelayCommand OpenTextureCommand { get; set; }

        public RelayCommand<CancelEventArgs> ClosingCommand { get; set; }

        public PreviewScreenViewModel()
        {
            ChangeRenderSizeCommand=new RelayCommand(ChangeRenderSize);
            RenderCommand=new RelayCommand(Render);
            ResetRenderSizeCommand=new RelayCommand(ResetRenderSize);
            OpenTextureCommand= new RelayCommand(LoadTexture);

            ClosingCommand=new RelayCommand<CancelEventArgs>(Window_Closing);
        }

        public DX10Viewport TheViewport { get; set; }


        public void LoadModel(List<PolygonUW> polygons)
        {
            if (TheViewport == null) return;
            TheViewport.LoadModel(polygons);
        }

        private void ChangeRenderSize()
        {
            var window=new ChangeSizeWindow();
            var locator = window.DataContext as ViewModelLocator;
            if (locator != null) locator.ChangeSizeScreen.ParentWindow = this;
            window.ShowDialog();
        }

        private void Render()
        {
            if (TheViewport == null) return;
            // Configure save file dialog box
            Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog();
            dlg.DefaultExt = ".dds"; // Default file extension
            dlg.Filter = "(dds)|*.dds"; // Filter files by extension

            // Show save file dialog box
            Nullable<bool> result = dlg.ShowDialog();

            // Process save file dialog box results
            if (result == true)
            {
                // Save document
                string filename = dlg.FileName;

                TheViewport.RenderToImage(filename);
            }

        }

        private void ResetRenderSize()
        {
            RenderSize = double.NaN;
        }

        private void Window_Closing(CancelEventArgs e)
        {
            e.Cancel = true;
        }

        private void LoadTexture()
        {
            if (TheViewport == null) return;
            // Configure open file dialog box
            Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();
            dlg.DefaultExt = ".png"; // Default file extension
            dlg.Filter = "(png)|*.png|(jpeg)|*.jpg|(tga)|*.tga|(dds)|*.dds"; // Filter files by extension

            // Show save file dialog box
            Nullable<bool> result = dlg.ShowDialog();

            // Process save file dialog box results
            if (result == true)
            {
                // Save document
                string filename = dlg.FileName;

                TheViewport.LoadImage(filename);
            }
        }

        public void ChangeSizeRenderer(double size)
        {
            RenderSize = size;
        }
    }
}