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

using Compdfkit_Tools.PDFControl;
using ComPDFKitViewer.AnnotEvent;
using ComPDFKitViewer.PdfViewer;
using System;
using System.ComponentModel; 
using System.Runtime.CompilerServices; 
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Media;
using Compdfkit_Tools.Helper;
using ComPDFKit.PDFAnnotation.Form;

namespace Compdfkit_Tools.PDFControl
{ 
    public partial class DigitalSignatureControl : UserControl, INotifyPropertyChanged
    {
        private bool isFirstLoad = true;
        public PDFViewControl PDFViewControl = new PDFViewControl();
        private SignatureStatusBarControl signatureStatusBarControl;
        private PanelState panelState = PanelState.GetInstance();
        private CPDFDisplaySettingsControl displaySettingsControl = null;
        private bool _isActive = false;
        public event EventHandler<bool> OnCanSaveChanged;
        private CPDFSignatureWidget currentSignatureWidget;

        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;
            SignatureStatusBorder.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;
            
            panelState.PropertyChanged -= PanelState_PropertyChanged;
            panelState.PropertyChanged += PanelState_PropertyChanged;

        }

        private void PDFView_WidgetClickHandler(object sender, WidgetArgs e)
        {
            Window parentWindow = Window.GetWindow((DependencyObject)sender);
            AddCertificationDialog addCertificationControl = new AddCertificationDialog
            {
                Owner = parentWindow
            };
            currentSignatureWidget = (e as WidgetSignArgs).Sign;
            addCertificationControl.FillSignatureEvent -= AddCertificationControl_FillSignatureEvent;
            addCertificationControl.FillSignatureEvent += AddCertificationControl_FillSignatureEvent;
            addCertificationControl.ShowDialog(); 
        }

        private void AddCertificationControl_FillSignatureEvent(object sender, CertificateAccess e)
        {
            FillDigitalSignatureDialog fillDigitalSignatureDialog = new FillDigitalSignatureDialog
            {
                FilePath = e.filePath,
                Password = e.password,
                SignatureWidget = currentSignatureWidget,
                Document = PDFViewControl.PDFView.Document
            };
            fillDigitalSignatureDialog.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)
            {
                ToggleButton button = sender as ToggleButton;
                button.IsChecked = false;
            }
        }

        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);
        }
        
        private void PanelState_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            if (e.PropertyName == nameof(PanelState.IsLeftPanelExpand))
            {
                ExpandLeftPanel(panelState.IsLeftPanelExpand);
            }
            else if (e.PropertyName == nameof(PanelState.RightPanel))
            {
                if (panelState.RightPanel == PanelState.RightPanelState.ViewSettings)
                {
                    ExpandRightPropertyPanel((IsActive)?displaySettingsControl:null, Visibility.Visible);
                }
                else
                {
                    ExpandRightPropertyPanel(null, Visibility.Collapsed);

                }
            }
        }

        public void ExpandLeftPanel(bool isExpand)
        {
            BotaContainer.Visibility = isExpand ? Visibility.Visible : Visibility.Collapsed;
            Splitter.Visibility = isExpand ? Visibility.Visible : Visibility.Collapsed;
            if (isExpand)
            {
                BodyGrid.ColumnDefinitions[0].Width = new GridLength(320);
                BodyGrid.ColumnDefinitions[1].Width = new GridLength(15);
            }
            else
            {
                BodyGrid.ColumnDefinitions[0].Width = new GridLength(0);
                BodyGrid.ColumnDefinitions[1].Width = new GridLength(0);
            }
        }
        
        public void ExpandRightPropertyPanel(UIElement propertytPanel, Visibility visible)
        {
            PropertyContainer.Width = 260;
            PropertyContainer.Child = propertytPanel;
            PropertyContainer.Visibility = visible;
        }
        
        public void SetBOTAContainer(CPDFBOTABarControl botaControl)
        {
            this.BotaContainer.Child = botaControl;
        }
        
        public void SetDisplaySettingsControl(CPDFDisplaySettingsControl displaySettingsControl)
        {
            this.displaySettingsControl = displaySettingsControl;
        }
        
        public void SetSignatureStatusBarControl(SignatureStatusBarControl signatureStatusBarControl)
        {
            this.signatureStatusBarControl = signatureStatusBarControl;
            SignatureStatusBorder.Child = this.signatureStatusBarControl;
            if (signatureStatusBarControl.Status != SignatureStatus.None)
            {
                SignatureStatusBorder.Visibility = Visibility.Visible;
            }
            else
            {
                SignatureStatusBorder.Visibility = Visibility.Collapsed;
            }
        }
        
        /// <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();
            }
        }
    }
}