kmpdfkit_demo/Demo/Examples/Compdfkit_Tools/PDFView/RegularViewerControl.xaml.cs

using System;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using Compdfkit_Tools.Annotation.PDFAnnotationPanel.PDFAnnotationUI;
using Compdfkit_Tools.Helper;
using Compdfkit_Tools.PDFControl;
using ComPDFKit.DigitalSign;
using ComPDFKit.PDFAnnotation.Form;
using ComPDFKitViewer;

namespace Compdfkit_Tools.PDFView
{
    public partial class RegularViewerControl : UserControl, INotifyPropertyChanged
    {
        public PDFViewControl PdfViewControl;
        public CPDFAnnotationControl PDFAnnotationControl = new CPDFAnnotationControl();
        private SignatureStatusBarControl signatureStatusBarControl;
        private CPDFDisplaySettingsControl displaySettingsControl = null;
        private PanelState panelState = PanelState.GetInstance();
        private double[] zoomLevelList = { 1f, 8f, 12f, 25, 33f, 50, 66f, 75, 100, 125, 150, 200, 300, 400, 600, 800, 1000 };
        public event PropertyChangedEventHandler PropertyChanged;
        public event EventHandler<bool> OnCanSaveChanged;

        private bool CanSave
        {
            get
            {
                if (PdfViewControl != null && PdfViewControl.PDFViewTool.GetCPDFViewer() != null)
                {
                    if (PdfViewControl.PDFViewTool.GetCPDFViewer().UndoManager.CanRedo ||
                        PdfViewControl.PDFViewTool.GetCPDFViewer().UndoManager.CanUndo)
                    {
                        return true;
                    }
                }

                return false;
            }
        }
        
        public RegularViewerControl()
        {
            InitializeComponent();
            panelState.PropertyChanged -= PanelState_PropertyChanged;
            panelState.PropertyChanged += PanelState_PropertyChanged;
        }
        
        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.PropertyPanel)
                {
                    ExpandRightPropertyPanel(PDFAnnotationControl, Visibility.Visible);
                }
                else if (panelState.RightPanel == PanelState.RightPanelState.ViewSettings)
                {
                    ExpandRightPropertyPanel(displaySettingsControl, 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;
        }
        
        #region Init PDFViewer

        private void InitialControl()
        {
            PdfViewControl.SplitPDFViewToolCreated -= PdfViewControl_SplitPDFViewToolCreated;
            PdfViewControl.SplitPDFViewToolCreated += PdfViewControl_SplitPDFViewToolCreated;
            PdfViewControl.PDFToolManager?.SetToolType(ComPDFKit.Tool.CPDFToolManager.ToolType.Viewer);
            //PdfViewControl.PDFView?.SetShowLink(true);
            PDFGrid.Child = PdfViewControl; 
            PdfViewControl.PDFViewTool.GetCPDFViewer().UndoManager.PropertyChanged -= UndoManager_PropertyChanged;
            PdfViewControl.PDFViewTool.GetCPDFViewer().UndoManager.PropertyChanged += UndoManager_PropertyChanged;
            //PdfViewControl.PDFView.SetFormFieldHighlight(true);
        }

        private void PdfViewControl_SplitPDFViewToolCreated(object sender, EventArgs e)
        {
            PdfViewControl.PDFViewTool.GetCPDFViewer().UndoManager.PropertyChanged -= UndoManager_PropertyChanged;
            PdfViewControl.PDFViewTool.GetCPDFViewer().UndoManager.PropertyChanged += UndoManager_PropertyChanged;
        }

        public void InitWithPDFViewer(PDFViewControl pdfViewer)
        {
            PdfViewControl = pdfViewer;
            PDFGrid.Child = PdfViewControl;
            FloatPageTool.InitWithPDFViewer(pdfViewer);
            InitialControl();
            DataContext = this;
            if(PdfViewControl!=null && PdfViewControl.PDFViewTool.GetCPDFViewer()!=null)
            {
                //PdfViewControl.PDFView.AnnotCommandHandler -= PDFView_AnnotCommandHandler;
                //PdfViewControl.PDFView.AnnotCommandHandler += PDFView_AnnotCommandHandler;
                //PdfViewControl.PDFView.WidgetClickHandler -= PDFView_WidgetClickHandler;
                //PdfViewControl.PDFView.WidgetClickHandler += PDFView_WidgetClickHandler;
            }
        }

        //private void PDFView_WidgetClickHandler(object sender, WidgetArgs e)
        //{
        //    if ((e is WidgetSignArgs args))
        //    {
        //        var signatureWidget = args.Sign;
        //        if(signatureWidget != null)
        //        {
        //            CPDFSignature sig = signatureWidget.GetSignature(PdfViewControl.PDFView.Document);
        //            if (signatureWidget.IsSigned() && sig!=null && sig?.SignerList.Count > 0)
        //            {
        //                return;
        //            }
        //        }
                
        //        if (args.WidgetType == C_WIDGET_TYPE.WIDGET_SIGNATUREFIELDS)
        //        {
        //            panelState.RightPanel = PanelState.RightPanelState.PropertyPanel;
        //            CPDFSignatureUI signatureProperty = new CPDFSignatureUI();
        //            signatureProperty.SetFormProperty(args, PdfViewControl.PDFView);
        //            PropertyContainer.Child = signatureProperty;
        //        }
        //    }
        //}
        
        public void CancelWidgetClickHandler()
        {
            //if (PdfViewControl != null && PdfViewControl.PDFView != null)
            //{
            //    PdfViewControl.PDFView.WidgetClickHandler -= PDFView_WidgetClickHandler;
            //}
        }

        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;
            }
        }

        #endregion

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

        #region PropertyChanged

        /// <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);
            }
        }

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

        #endregion
        
        #region Context Menu

        private void ExtraImage_Click(object sender, RoutedEventArgs e)
        {
            //CommandHelper.ExtraImage_Click(PdfViewControl.PDFView.GetSelectedImages());
        }

        private void CopyImage_Click(object sender, RoutedEventArgs e)
        {
            //CommandHelper.CopyImage_Click(PdfViewControl.PDFView.GetSelectedImages());
        }

        //private void PDFView_AnnotCommandHandler(object sender, AnnotCommandArgs e)
        //{
        //    if (e != null && e.CommandType == CommandType.Context)
        //    {
        //        if (e.PressOnSelectedText)
        //        {
        //            e.Handle = true;
        //            e.PopupMenu = new ContextMenu();
        //            e.PopupMenu.Items.Add(new MenuItem() { Header = "Copy", Command = ApplicationCommands.Copy, CommandTarget = (UIElement)sender });
        //        }
        //        else if (e.CommandTarget == TargetType.ImageSelection)
        //        {
        //            if (PdfViewControl != null && PdfViewControl.PDFView != null && PdfViewControl.PDFView.GetSelectImageCount() > 0)
        //            {
        //                e.Handle = true;
        //                e.PopupMenu = new ContextMenu();

        //                MenuItem imageCopyMenu = new MenuItem();
        //                imageCopyMenu = new MenuItem();
        //                imageCopyMenu.Header = "Copy Images";
        //                WeakEventManager<MenuItem, RoutedEventArgs>.AddHandler(imageCopyMenu, "Click", CopyImage_Click);
        //                imageCopyMenu.CommandParameter = e;
        //                e.PopupMenu.Items.Add(imageCopyMenu);

        //                MenuItem imageExtraMenu = new MenuItem();
        //                imageExtraMenu = new MenuItem();
        //                imageExtraMenu.Header = "Extract Images";
        //                WeakEventManager<MenuItem, RoutedEventArgs>.AddHandler(imageExtraMenu, "Click", ExtraImage_Click);
        //                imageExtraMenu.CommandParameter = e;
        //                e.PopupMenu.Items.Add(imageExtraMenu);
        //            }
        //        }
        //        else
        //        {
        //            e.Handle = true;
        //            e.PopupMenu = new ContextMenu();
        //            //if (PdfViewControl.CheckHasForm())

        //            MenuItem fitWidthMenu = new MenuItem();
        //            fitWidthMenu.Header = "Automatically Resize";
        //            fitWidthMenu.Click += (o, p) =>
        //            {
        //                if (PdfViewControl != null)
        //                {
        //                    PdfViewControl.PDFView?.ChangeFitMode(FitMode.FitWidth);
        //                }
        //            };

        //            e.PopupMenu.Items.Add(fitWidthMenu);

        //            MenuItem fitSizeMenu = new MenuItem();
        //            fitSizeMenu.Header = "Actual Size";
        //            fitSizeMenu.Click += (o, p) =>
        //            {
        //                if (PdfViewControl != null)
        //                {
        //                    PdfViewControl.PDFView?.ChangeFitMode(FitMode.FitSize);
        //                }
        //            };

        //            e.PopupMenu.Items.Add(fitSizeMenu);

        //            MenuItem zoomInMenu = new MenuItem();
        //            zoomInMenu.Header = "Zoom In";
        //            zoomInMenu.Click += (o, p) =>
        //            {
        //                if (PdfViewControl != null)
        //                {
        //                    double newZoom = CommandHelper.CheckZoomLevel(zoomLevelList,PdfViewControl.PDFView.ZoomFactor + 0.01, true);
        //                    PdfViewControl.PDFView?.Zoom(newZoom);
        //                }
        //            };

        //            e.PopupMenu.Items.Add(zoomInMenu);

        //            MenuItem zoomOutMenu = new MenuItem();
        //            zoomOutMenu.Header = "Zoom Out";
        //            zoomOutMenu.Click += (o, p) =>
        //            {
        //                if (PdfViewControl != null)
        //                {
        //                    double newZoom = CommandHelper.CheckZoomLevel(zoomLevelList,PdfViewControl.PDFView.ZoomFactor - 0.01, false);
        //                    PdfViewControl.PDFView?.Zoom(newZoom);
        //                }
        //            };

        //            e.PopupMenu.Items.Add(zoomOutMenu);
        //            e.PopupMenu.Items.Add(new Separator());

        //            MenuItem singleView = new MenuItem();
        //            singleView.Header = "Single Page";
        //            singleView.Click += (o, p) =>
        //            {
        //                if (PdfViewControl != null)
        //                {
        //                    PdfViewControl.PDFView?.ChangeViewMode(ViewMode.Single);
        //                }
        //            };

        //            e.PopupMenu.Items.Add(singleView);

        //            MenuItem singleContinuousView = new MenuItem();
        //            singleContinuousView.Header = "Single Page Continuous";
        //            singleContinuousView.Click += (o, p) =>
        //            {
        //                if (PdfViewControl != null)
        //                {
        //                    PdfViewControl.PDFView?.ChangeViewMode(ViewMode.SingleContinuous);
        //                }
        //            };

        //            e.PopupMenu.Items.Add(singleContinuousView);

        //            MenuItem doubleView = new MenuItem();
        //            doubleView.Header = "Two Pages";
        //            doubleView.Click += (o, p) =>
        //            {
        //                if (PdfViewControl != null)
        //                {
        //                    PdfViewControl.PDFView?.ChangeViewMode(ViewMode.Double);
        //                }
        //            };

        //            e.PopupMenu.Items.Add(doubleView);

        //            MenuItem doubleContinuousView = new MenuItem();
        //            doubleContinuousView.Header = "Two Pages Continuous";
        //            doubleContinuousView.Click += (o, p) =>
        //            {
        //                if (PdfViewControl != null)
        //                {
        //                    PdfViewControl.PDFView?.ChangeViewMode(ViewMode.DoubleContinuous);
        //                }
        //            };
        //            e.PopupMenu.Items.Add(doubleContinuousView);

        //            {
        //                MenuItem resetForms = new MenuItem();
        //                resetForms.Header = "Reset Forms";
        //                resetForms.Click += (o, p) =>
        //                {
        //                    if (PdfViewControl != null)
        //                    {
        //                        PdfViewControl.PDFView?.ResetForm(null);
        //                    }
        //                };
        //                e.PopupMenu.Items.Add(new Separator());
        //                e.PopupMenu.Items.Add(resetForms);
        //            }
        //        }
        //    }

        //    if (e != null && e.CommandType == CommandType.Copy)
        //    {
        //        e.DoCommand();
        //    }
        //}

        #endregion

        private void UserControl_Unloaded(object sender, RoutedEventArgs e)
        {
            //PdfViewControl.PDFView.AnnotCommandHandler -= PDFView_AnnotCommandHandler;
            //PdfViewControl.PDFView.WidgetClickHandler -= PDFView_WidgetClickHandler;
        }
    }
}