PDFOffice_Windows_exe/PDF Office/ViewModels/Tools/ToolsBarContentViewModel.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.Security.Cryptography.X509Certificates;

namespace PDF_Office.ViewModels.Tools
{
    public class ToolsBarContentViewModel : BindableBase,INavigationAware
    {
        private CPDFViewer PDFViewer;

        private ViewContentViewModel viewContentViewModel;

        public IDialogService dialogs;

        /// <summary>
        /// 是否是第一次加载
        /// </summary>
        private bool isFirstLoad = true;

        public DelegateCommand CompressCommand { get; set; }

        public DelegateCommand SetPasswordCommand { get; set; }

        public DelegateCommand CancelPasswordCommand { get; set; }

        public ToolsBarContentViewModel(IDialogService dialogService)
        {
            dialogs= dialogService;

            CompressCommand = new DelegateCommand(OpenCompressDialog);
            SetPasswordCommand = new DelegateCommand(OpenSetPasswordDialog);
            CancelPasswordCommand = new DelegateCommand(OpenCancelPasswordDialog);
        }

        private void OpenCompressDialog()
        {
            DialogParameters value = new DialogParameters();
            value.Add(ParameterNames.PDFDocument, PDFViewer.Document);
            dialogs.ShowDialog(DialogNames.CompressDialog, value, e => {  });
        }

        private void OpenSetPasswordDialog()
        {
            DialogParameters value = new DialogParameters();
            value.Add(ParameterNames.PDFDocument, PDFViewer.Document);
            dialogs.ShowDialog(DialogNames.SetPasswordDialog, value, e => { });
        }

        private void OpenCancelPasswordDialog()
        {
            DialogParameters value = new DialogParameters();
            value.Add(ParameterNames.PDFDocument, PDFViewer.Document);
            dialogs.ShowDialog(DialogNames.DeleteSafetySettingsDialog, value, e => { });
        }

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

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            navigationContext.Parameters.TryGetValue<ViewContentViewModel>(ParameterNames.ViewContentViewModel, out viewContentViewModel);
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            if (PDFViewer != null)
            {
                isFirstLoad = false;
            }
        }
    }
}