PDFOffice_Windows_exe/PDF Office/ViewModels/PropertyPanel/ViewModularContentViewModel.cs

using ComPDFKitViewer.PdfViewer;
using PDF_Office.Model;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Regions;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PDF_Office.ViewModels.PropertyPanel
{
    public class ViewModularContentViewModel : BindableBase, INavigationAware
    {
        public IRegionManager region;

        public IDialogService dialogs;
        public CPDFViewer PDFViewer { get; set; }
        public string SplitScreenViewRegionName { get; set; }

        public DelegateCommand<object> VerticalSplitScreenCommand { get; set; }

        public ViewModularContentViewModel(IRegionManager regionManager, IDialogService dialogService)
        {
            region = regionManager;
            dialogs = dialogService;
            SplitScreenViewRegionName = RegionNames.SplitScreenViewRegionName;
            VerticalSplitScreenCommand = new DelegateCommand<object>(VerticalSplitScreenEvent);

            //System.Windows.Application.Current.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Send, new Action(() =>
            //{
            //    NavigationParameters parameters = new NavigationParameters();
            //    parameters.Add(ParameterNames.PDFViewer, PDFViewer);
            //    parameters.Add(ParameterNames.ViewContentViewModel, this);
            //    region.RequestNavigate(RegionNames.SplitScreenViewRegionName, "SplitScreenView", parameters);
            //}
            //));
        }

        private void VerticalSplitScreenEvent(object obj)
        {
            NavigationParameters param = new NavigationParameters();
            param.Add(ParameterNames.PDFViewer, PDFViewer);
            region.RequestNavigate(RegionNames.SplitScreenViewRegionName, "SplitScreenView", param);
        }

        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            var pdfview = navigationContext.Parameters[ParameterNames.PDFViewer] as CPDFViewer;
            if (pdfview != null)
            {
                PDFViewer = pdfview;
            }
        }
    }
}