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;
using ComPDFKitViewer.PdfViewer;
using PDF_Office.Model;

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

        private CPDFViewer PDFViewer;

        private ViewContentViewModel viewContentViewModel;

        public string TemplateListName = "BackgroundTemplateListBaseContent";
        public string CreateName = "BackgroundCreateBaseContent";
        public string CreateModColorName = "BackgroundCreateColorContent";
        public string CreateModFileName = "BackgroundCreateFileContent";

        public string BackgroundDocumentName = "BackgroundDocumentContent";

        private string _backgroundSettingsRegionName;
        /// <summary>
        /// 属性设置Region
        /// </summary>
        public string BackgroundSettingsRegionName
        {
            get { return _backgroundSettingsRegionName; }
            set { _backgroundSettingsRegionName = value; }
        }

        private Visibility _backgroundSettingsVisible = Visibility.Collapsed;
        /// <summary>
        /// 属性设置Region可见
        /// </summary>
        public Visibility BackgroundSettingsVisible
        {
            get { return _backgroundSettingsVisible; }
            set { _backgroundSettingsVisible = value; }
        }

        private string _backgroundDocumentRegionName;
        /// <summary>
        /// 持有Document的Region，负责渲染和保存
        /// </summary>
        public string BackgroundDocumentRegionName
        {
            get { return _backgroundDocumentRegionName; }
            set { _backgroundDocumentRegionName = value; }
        }

        private Visibility _backgroundDocumentVisible = Visibility.Visible;
        /// <summary>
        /// 持有Document的Region可见
        /// </summary>
        public Visibility BackgroundDocumentVisible
        {
            get { return _backgroundDocumentVisible; }
            set { _backgroundDocumentVisible = value; }
        }

        private EnumColorOrFile _currentCreateMod;
        public EnumColorOrFile CurrentCreateMod
        {
            get { return _currentCreateMod; }
            set { _currentCreateMod = value; }
        }

        /// <summary>
        /// 退出EditTool
        /// </summary>
        public DelegateCommand CloseEditToolCommand { get; set; }
        public DelegateCommand ConfirmEditToolCommand { 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();
            BackgroundDocumentRegionName = Guid.NewGuid().ToString();

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

            eventAggregator.GetEvent<EnterTemplateListOrCreateEvent>().Subscribe(EnterTemplateListOrCreate);
            eventAggregator.GetEvent<SetCurrentCreateModEvent>().Subscribe(SetCurrentCreateMod);
        }

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

        public void ConfirmEditTool()
        {
            this.eventAggregator.GetEvent<ConfirmEditToolsBackgroundEvent>().Publish(CurrentCreateMod);
        }

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

        public void SetCurrentCreateMod(string currentCreateModName)
        {
            if (currentCreateModName == CreateModColorName)
            {
                CurrentCreateMod = EnumColorOrFile.StatusColor;
            }
            else if (currentCreateModName == CreateModFileName)
            {
                CurrentCreateMod = EnumColorOrFile.StatusFile;
            }
        }

        public void EnterSelectedContent(string SelectedContentName)
        {
            NavigationParameters param = new NavigationParameters();
            param.Add(ParameterNames.PDFViewer, PDFViewer);
            backgroundRegion.RequestNavigate(BackgroundSettingsRegionName, SelectedContentName, param);
            BackgroundSettingsVisible = Visibility.Visible;
        }

        public void EnterDocumentContent()
        {
            NavigationParameters param = new NavigationParameters();
            param.Add(ParameterNames.PDFViewer, PDFViewer);
            backgroundRegion.RequestNavigate(BackgroundDocumentRegionName, BackgroundDocumentName, param);
            BackgroundDocumentVisible = Visibility.Visible;
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            navigationContext.Parameters.TryGetValue<ViewContentViewModel>(ParameterNames.ViewContentViewModel, out viewContentViewModel);
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            EnterSelectedContent(TemplateListName);
            EnterDocumentContent();
        }

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

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
        }
    }
}