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

using Compdfkit_Tools.PDFControl;
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
{
    /// <summary>
    /// DigitalSignatureControl.xaml 的交互逻辑
    /// </summary>
    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();
        }

        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();
            }
        }
    }
}