PDFOffice_Windows_exe/PDF Office/ViewModels/PropertyPanel/AnnotPanel/SignatureAnnotPropertyViewModel.cs

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

namespace PDF_Office.ViewModels.PropertyPanel.AnnotPanel
{
    class SignatureAnnotPropertyViewModel : BindableBase, INavigationAware
    {
        private CPDFViewer PDFViewer;
        private IDialogService dialogs;
        public DelegateCommand ShowDialogCommand { get; set; }

        public ObservableCollection<Signature> SignatureList { get; set; }
        public SignatureAnnotPropertyViewModel(IDialogService dialogService)
        {
            dialogs = dialogService;
            ShowDialogCommand = new DelegateCommand(ShowDialog);
            SignatureList = new ObservableCollection<Signature>();
        }
        public void SetSignature(Signature signature)
        {
            switch (signature.Type)
            {
                case SignatureType.TextType:
                case SignatureType.ImageType:

                    StampAnnotArgs stampArgs = new StampAnnotArgs();
                    stampArgs.Opacity = 1;
                    stampArgs.Type = StampType.IMAGE_STAMP;
                    stampArgs.ImagePath = signature.SourcePath;
                    PDFViewer.SetMouseMode(MouseModes.AnnotCreate);
                    PDFViewer.SetToolParam(stampArgs);
                    break;
                case SignatureType.Drawing:
                    break;
                default:
                    break;
            }
        }
        private void ShowDialog()
        {
            bool result = true;
            DialogParameters value = new DialogParameters();
            value.Add(ParameterNames.PDFViewer, PDFViewer);
            dialogs.ShowDialog(DialogNames.SignatureCreateDialog, value, e =>
            {
                if (e.Result != ButtonResult.OK)
                {
                    result = false;
                }
                SignatureCreateDialogViewModel DialogVM = e.Parameters.GetValue<SignatureCreateDialogViewModel>(ParameterNames.DataModel);
                if (DialogVM != null)
                {
                    CreateSignature(DialogVM);
                }
            });
            if (!result)
            {
                return;
            }
        }

        /// <summary>
        /// 创建签名，并保存到APP缓存
        /// </summary>
        /// <param name="viewModel"></param>
        private void CreateSignature(SignatureCreateDialogViewModel viewModel)
        {
            Signature Signature = new Signature();
            Signature.SourcePath = viewModel.SaveToPath;
            Signature.Type = (SignatureType)viewModel.TabItemIndex;
            SignatureList.Add(Signature);
        }
        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            return;
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            if (PDFViewer == null)
            {
                return;
            }
        }
    }
}