PDFOffice_Windows_exe/PDF Office/ViewModels/EditTools/Watermark/WatermarkContentViewModel.cs

using PDF_Office.EventAggregators;
using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;

namespace PDF_Office.ViewModels.EditTools.Watermark
{
    public class WatermarkContentViewModel : BindableBase,INavigationAware
    {
        public IEventAggregator eventAggregator;
        public IRegionManager backgroundRegion;

        public string TemplateListName = "WatermarkTemplateListBaseContent";
        public string CreateName = "WatermarkCreateBaseContent";

        private string _watermarkSettingsRegionName;
        public string WatermarkSettingsRegionName
        {
            get { return _watermarkSettingsRegionName; }
            set { _watermarkSettingsRegionName = value; }
        }

        private Visibility _watermarkSettingsVisible = Visibility.Collapsed;
        public Visibility WatermarkSettingsVisible
        {
            get { return _watermarkSettingsVisible; }
            set { _watermarkSettingsVisible = value; }
        }


        public DelegateCommand CloseEditToolCommand { get; set; }

        public DelegateCommand<string> EnterSelectedContentCommand { get; set; }
        public WatermarkContentViewModel(IRegionManager regionManager, IEventAggregator eventAggregator)
        {
            this.eventAggregator = eventAggregator;
            this.backgroundRegion = regionManager;
            WatermarkSettingsVisible = Visibility.Visible;
            WatermarkSettingsRegionName = Guid.NewGuid().ToString();

            CloseEditToolCommand = new DelegateCommand(CloseEditTool);
            EnterSelectedContentCommand = new DelegateCommand<string>(EnterSelectedContent);

            eventAggregator.GetEvent<EnterTemplateListOrCreateEvent>().Subscribe(EnterTemplateListOrCreate);
        }
        public void CloseEditTool()
        {
            this.eventAggregator.GetEvent<CloseEditToolEvent>().Publish();

        }

        public void EnterTemplateListOrCreate(EnumTemplateListOrCreate enumTemplateListOrCreate)
        {
            if (enumTemplateListOrCreate == EnumTemplateListOrCreate.StatusTemplate)
            {
                EnterSelectedContent(TemplateListName);
            }
            else
            {
                EnterSelectedContent(CreateName);
            }
        }

        public void EnterSelectedContent(string SelectedContentName)
        {
            backgroundRegion.RequestNavigate(WatermarkSettingsRegionName, SelectedContentName);
            WatermarkSettingsVisible = Visibility.Visible;
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            EnterSelectedContent(TemplateListName);
        }

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

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
        }
    }
}