PDFOffice_Windows_exe/PDF Office/ViewModels/EditTools/Background/BackgroundContentViewModel.cs

using Dropbox.Api.Sharing;
using PDF_Office.EventAggregators;
using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Windows;
using System.Linq;
using System.Windows.Controls;
using Visibility = System.Windows.Visibility;
using Dropbox.Api.FileProperties;

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

        public string TemplateListName = "BackgroundTemplateListBaseContent";
        public string CreateName = "BackgroundCreateBaseContent";

        private string _backgroundSettingsRegionName;
        public string BackgroundSettingsRegionName
        {
            get { return _backgroundSettingsRegionName; }
            set { _backgroundSettingsRegionName = value;}
        }

        private Visibility _backgroundSettingsVisible = Visibility.Collapsed;
        public Visibility BackgroundSettingsVisible
        {
            get { return _backgroundSettingsVisible; }
            set { _backgroundSettingsVisible = value; }
        }

        /// <summary>
        /// 退出EditTool
        /// </summary>
        public DelegateCommand CloseEditToolCommand { get; set; }

        public DelegateCommand<string> EnterSelectedContentCommand { get; set; }

        public BackgroundContentViewModel( IRegionManager regionManager, IEventAggregator eventAggregator)
        {
            this.eventAggregator = eventAggregator;
            this.backgroundRegion = regionManager;
            BackgroundSettingsVisible = Visibility.Visible;
            BackgroundSettingsRegionName = 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(BackgroundSettingsRegionName, SelectedContentName);
            BackgroundSettingsVisible = Visibility.Visible;
        }

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

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

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
        }
    }
}