kmpdfkit_demo/Demo/Examples/Compdfkit_Tools/DigitalSignature/DigitalSignatureControl/DigitalSignatureControl.xaml.cs

using Compdfkit_Tools.DigitalSignature.AddCertificationControl;
using Compdfkit_Tools.PDFControl;
using ComPDFKitViewer.AnnotEvent;
using ComPDFKitViewer.PdfViewer;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Compdfkit_Tools.PDFControl
{ 
    public partial class DigitalSignatureControl : UserControl, INotifyPropertyChanged
    {
        private bool isFirstLoad = true;
        public PDFViewControl PDFViewControl = new PDFViewControl();
        private bool _isActive = false;
        public event EventHandler<bool> OnCanSaveChanged;

        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged([CallerMemberName] string name = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
        }

        public bool IsActive
        {
            get => _isActive;

            set
            {
                _isActive = value;
                OnPropertyChanged();
            }
        }

        public bool CanUndo
        {
            get
            {
                if (PDFViewControl != null && PDFViewControl.PDFView != null)
                {
                    return PDFViewControl.PDFView.UndoManager.CanUndo;
                }
                return false;
            }
        }

        public bool CanRedo
        {
            get
            {
                if (PDFViewControl != null && PDFViewControl.PDFView != null)
                {
                    return PDFViewControl.PDFView.UndoManager.CanRedo;
                }

                return false;
            }
        }

        private bool CanSave
        {
            get
            {
                if (PDFViewControl != null && PDFViewControl.PDFView != null)
                {
                    return PDFViewControl.PDFView.UndoManager.CanSave;
                }

                return false;
            }
        }
        public DigitalSignatureControl()
        {
            InitializeComponent();
            DataContext = this;
        }

        public void ClearViewerControl()
        {
            PDFGrid.Child = null;
            BotaContainer.Child = null;
            PropertyContainer.Child = null;
        }

        public void InitWithPDFViewer(CPDFViewer pdfViewer)
        {
            PDFViewControl.PDFView = pdfViewer;
            PDFGrid.Child = PDFViewControl;
            FloatPageTool.InitWithPDFViewer(pdfViewer);
            InitialControl();
            DigitalSignatureBarControl.DigitalSignatureActionChanged -= DigitalSignatureBarControl_DigitalSignatureActionChanged;
            DigitalSignatureBarControl.DigitalSignatureActionChanged += DigitalSignatureBarControl_DigitalSignatureActionChanged;

            PDFViewControl.PDFView.WidgetClickHandler -= PDFView_WidgetClickHandler;
            PDFViewControl.PDFView.WidgetClickHandler += PDFView_WidgetClickHandler; ;

        }

        private void PDFView_WidgetClickHandler(object sender, WidgetArgs e)
        {
            Window parentWindow = Window.GetWindow((DependencyObject)sender);
            AddCertificationDialog addCertificationControl = new AddCertificationDialog();
            addCertificationControl.Owner = parentWindow;
            addCertificationControl.ShowDialog();
        }


        private void DigitalSignatureBarControl_DigitalSignatureActionChanged(object sender, Common.CPDFDigitalSignatureBarControl.DigitalSignatureAction e)
        {
            if (e == Common.CPDFDigitalSignatureBarControl.DigitalSignatureAction.AddSignatrueField)
            {
                CreateSign();
            }
            else if (e == Common.CPDFDigitalSignatureBarControl.DigitalSignatureAction.Signing)
            {
                PDFViewControl.PDFView.SetMouseMode(MouseModes.Viewer);
            }
            else if (e == Common.CPDFDigitalSignatureBarControl.DigitalSignatureAction.VerifySignature)
            {

            }
        }

        private string GetTime()
        {
            DateTime dateTime = DateTime.Now;
            return " " + dateTime.ToString("yyyy-MM-dd HH:mm:ss.fff");
        }

        private void CreateSign()
        {
            PDFViewControl.PDFView.SetMouseMode(MouseModes.FormEditTool);
            WidgetSignArgs signArgs = new WidgetSignArgs
            {
                LineWidth = 1,
                LineColor = Colors.Black,
                FieldName = "Signature" + GetTime()
            };
            PDFViewControl.PDFView.SetToolParam(signArgs);
        }

        private void InitialControl()
        {
            PDFViewControl.PDFView?.SetMouseMode(MouseModes.Viewer);
            //PDFViewControl.PDFView?.Load();
            PDFViewControl.PDFView?.SetShowLink(true);
            PDFGrid.Child = PDFViewControl;
            PDFViewControl.PDFView.UndoManager.PropertyChanged -= UndoManager_PropertyChanged;
            PDFViewControl.PDFView.UndoManager.PropertyChanged += UndoManager_PropertyChanged;
            PDFViewControl.PDFView.SetFormFieldHighlight(true);
        }

        /// <summary>
        /// Undo Redo Event Noitfy
        /// </summary>
        private void UndoManager_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            OnPropertyChanged(e.PropertyName);
            if (e.PropertyName == "CanSave")
            {
                OnCanSaveChanged?.Invoke(this, CanSave);
            }
        }

        private void CommandBinding_Executed_Undo(object sender, ExecutedRoutedEventArgs e)
        {
            if (PDFViewControl != null && PDFViewControl.PDFView != null && CanUndo)
            {
                PDFViewControl.PDFView.UndoManager?.Undo();
            }
        }

        private void CommandBinding_Executed_Redo(object sender, ExecutedRoutedEventArgs e)
        {
            if (PDFViewControl != null && PDFViewControl.PDFView != null && CanUndo)
            {
                PDFViewControl.PDFView.UndoManager?.Redo();
            }
        }

        private void UndoButton_Click(object sender, RoutedEventArgs e)
        {
            if (PDFViewControl != null && PDFViewControl.PDFView != null && CanUndo)
            {
                PDFViewControl.PDFView.UndoManager?.Undo();
            }
        }

        private void RedoButton_Click(object sender, RoutedEventArgs e)
        {
            if (PDFViewControl != null && PDFViewControl.PDFView != null && CanUndo)
            {
                PDFViewControl.PDFView.UndoManager?.Redo();
            }
        }
    }
}