PDFOffice_Windows_exe/PDF Office/ViewModels/PropertyPanel/PDFEdit/TextEditPropertyViewModel.cs

using ComPDFKitViewer;
using ComPDFKitViewer.AnnotEvent;
using ComPDFKitViewer.PdfViewer;
using Microsoft.Win32;
using PDF_Master.CustomControl.CompositeControl;
using PDF_Master.Helper;
using PDF_Master.Model;
using PDF_Master.Model.AnnotPanel;
using PDF_Master.Model.PropertyPanel.AnnotPanel;
using PDF_Master.ViewModels.Tools.AnnotManager;
using PDFSettings;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;

namespace PDF_Master.ViewModels.PropertyPanel.PDFEdit
{

    public class TextEditPropertyViewModel : PDFEditVM, INavigationAware
    {

        #region 属性
        public event EventHandler ClearCheckedAglin;
        public TextEditPropertyViewModel()
        {
            InitVariable();
            InitCommand();
        }
        private void InitVariable()
        {
            InitBaseVariable();
        }
        private bool isSelectedEmpty;
        public bool IsSelectedEmpty
        {
            get { return isSelectedEmpty; }
            set { SetProperty(ref isSelectedEmpty, value); }
        }
        private string title;

        public string Title
        {
            get { return title; }
            set
            {
                SetProperty(ref title, value);
            }
        }
        private FontBoardVm _fontVm = new FontBoardVm(true);

        public FontBoardVm FontVm
        {
            get { return _fontVm; }
            set { SetProperty(ref _fontVm, value); }
        }


        private ComPDFKit.PDFPage.Edit.TextAlignType _textAlign;
        public ComPDFKit.PDFPage.Edit.TextAlignType TextAlign
        {
            get { return _textAlign; }
            set { _textAlign = value; }
        }
        #endregion
        #region Command

     
        public DelegateCommand AddTextCommand { get; set; }
        public DelegateCommand AddImgCommand { get; set; }

        public DelegateCommand<object> SelectedColorCommand { get; set; }
        public DelegateCommand<object> SelectedFontStyleCommand { get; set; }

        public DelegateCommand<object> FontSizeChangedCommand { get; set; }

        public DelegateCommand<object> TextAlignCheckedCommand { get; set; }
        //进入属性面板编辑
        public DelegateCommand EditTextModeCommand { get; set; }
        public DelegateCommand FontFamilyChangedCommand { get; set; }
        public DelegateCommand CustomFontStyleCommand { get; set; }
        public DelegateCommand FontStyleWeightChangedCommand { get; set; }
        public DelegateCommand SelectedPresetFontCommand { get; set; }

        //重定义
        public DelegateCommand ReDefineFontStyleCommand { get; set; }
        public DelegateCommand RestoreDefaultStyleCommand { get; set; }
        public DelegateCommand<object> LayoutAlignCheckedCommand { get; set; }
        

        #endregion

        #region 初始化
      

        private void InitCommand()
        {
            //预设文本样式
            SelectedPresetFontCommand = new DelegateCommand(SelectedPresetFont);
            //字体
            FontFamilyChangedCommand = new DelegateCommand(FontFamilyChanged);
            //文本字重、字体
            FontStyleWeightChangedCommand = new DelegateCommand(FontStyleWeightChanged);
            //添加文本
            AddTextCommand = new DelegateCommand(AddText);
            //添加图片
            AddImgCommand = new DelegateCommand(AddImg);
            //选择颜色
            SelectedColorCommand = new DelegateCommand<object>(SelectedColor);
            //选择字体样式
            SelectedFontStyleCommand = new DelegateCommand<object>(SelectedFontStyle);
            //大小
            FontSizeChangedCommand = new DelegateCommand<object>(FontSizeChanged);
            //内容对齐
            TextAlignCheckedCommand = new DelegateCommand<object>(TextAlignChecked);
            //编辑模式
            EditTextModeCommand = new DelegateCommand(EditTextMode);
            //自定义
            CustomFontStyleCommand = new DelegateCommand(CustomFontStyle);
            //重新定义
            ReDefineFontStyleCommand = new DelegateCommand(ReDefineFontStyle);
            //恢复默认
            RestoreDefaultStyleCommand = new DelegateCommand(RestoreDefaultStyle);
            //文本对齐
            LayoutAlignCheckedCommand = new DelegateCommand<object>(LayoutAlignChecked);
        }

        #endregion

        #region 文本处理逻辑

        private void AddText()
        {
            //设置对应创建模式
            PDFViewer.SetPDFEditCreateType(ComPDFKit.PDFPage.CPDFEditType.EditText);
        }

        private void AddImg()
        {
            PDFViewer.SetPDFEditCreateType(ComPDFKit.PDFPage.CPDFEditType.EditImage);
        }

        private void EditTextMode()
        {

        }
        /// <summary>
        /// 从预设样式设置文本
        /// </summary>
        private void SelectedPresetFont()
        {
            if (CurrentPresetFont != null)
            {
                var itemComboxItem = CurrentPresetFont;

                var item = PresetFontList.FirstOrDefault(temp => temp.mTag == itemComboxItem.ValueStr);
                if (item != null)
                {
                    if (item.mTag != "Custom")
                    {
                        GetCurrentFontSize(item.mFontSize);

                        if (item.mFontFamily != null)
                        {
                            GetCurrentFontFamily(item.mFontFamily.ToString(), item.mFontFamily.ToString());
                        }
                        GetFontWeights_Style(item.mFontStyle, item.mFontWeight);
                        CurrentFontSize = new ComboDataItem(TextEditEvent.FontSize);
                        CurrentFontFamily = new ComboDataItem(TextEditEvent.FontName, TextEditEvent.FontName);
                        FontStyleItem = TextEditEvent.IsItalic ? FontStyles.Italic : FontStyles.Normal;
                        FontWeightItem = TextEditEvent.IsBold ? FontWeights.Bold : FontWeights.Normal;
                    }
                }
            }
        }

        /// <summary>
        /// 自定义文字样式
        /// </summary>
        private void CustomFontStyle()
        {

            if (CurrentPresetFont != null)
            {
                ContextMenu menu;
                if (CurrentPresetFont.ValueStr == "Custom")
                {
                    menu = SelectAnnotContextMenu(false);
                }
                else
                {
                    menu = SelectAnnotContextMenu(false);

                    var currentItem = PresetFontList.FirstOrDefault(temp => temp.mTag == CurrentPresetFont.ValueStr);
                    if (currentItem.mTag != "Custom")
                    {
                        if (FontWeightItem != currentItem.mFontWeight ||
                            FontStyleItem != currentItem.mFontStyle ||
                            CurrentFontSize.Value != currentItem.mFontSize ||
                            CurrentFontFamily.ValueStr != currentItem.mFontFamily.Source)
                        {
                            menu = SelectAnnotContextMenu(true);
                        }
                    }
                }

                if (menu != null)
                {
                    menu.IsOpen = true;
                }
            }


        }

        //设置字体样式
        private void FontFamilyChanged()
        {
            if (CurrentPresetFont != null)
            {
                var currentItem = PresetFontList.FirstOrDefault(temp => temp.mTag == CurrentPresetFont.ValueStr);
                if (currentItem.mTag != "Custom")
                {
                    foreach (var item in PresetFontList)
                    {
                        if (item.mTag == currentItem.mTag)
                        {
                            if (CurrentFontFamily.ValueStr != item.mFontFamily.Source)
                            {
                                string txt = string.Format($" * {currentItem.mTagContent}");

                                if (Title == txt)
                                {
                                    Title = "";
                                }
                                Title = txt;
                                break;
                            }
                            else
                            {
                                if (FontWeightItem == item.mFontWeight && FontStyleItem == item.mFontStyle && CurrentFontSize.Value == item.mFontSize && CurrentFontFamily.ValueStr == item.mFontFamily.Source)
                                {
                                    string txt = currentItem.mTagContent;

                                    if (Title == txt)
                                    {
                                        Title = "";
                                    }
                                    Title = txt;
                                }
                            }
                        }
                    }
                }
            }
        }

        /// <summary>
        /// 设置文本字重、样式
        /// </summary>
        private void FontStyleWeightChanged()
        {
            if (CurrrentFontWeightStyle != null)
            {
                UpdateFontWeight_Style();
                FontStyleItem = TextEditEvent.IsItalic ? FontStyles.Italic : FontStyles.Normal;
                FontWeightItem = TextEditEvent.IsBold ? FontWeights.Bold : FontWeights.Normal;

                if (CurrentPresetFont != null)
                {
                    var currentItem = PresetFontList.FirstOrDefault(temp => temp.mTag == CurrentPresetFont.ValueStr);
                    if (currentItem.mTag != "Custom")
                    {
                        foreach (var item in PresetFontList)
                        {
                            if (item.mTag == currentItem.mTag)
                            {
                                if (FontWeightItem != item.mFontWeight || FontStyleItem != item.mFontStyle)
                                {
                                    string txt = string.Format($" * {currentItem.mTagContent}");

                                    if (Title == txt)
                                    {
                                        Title = "";
                                    }
                                    Title = txt;
                                    break;
                                }
                                else
                                {
                                    if (FontWeightItem == item.mFontWeight && FontStyleItem == item.mFontStyle && CurrentFontSize.Value == item.mFontSize && CurrentFontFamily.ValueStr == item.mFontFamily.Source)
                                    {
                                        string txt = currentItem.mTagContent;

                                        if (Title == txt)
                                        {
                                            Title = "";
                                        }
                                        Title = txt;
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }

        /// <summary>
        /// 用所选部分重新定义
        /// </summary>
        private void ReDefineFontStyle()
        {

            var item = PresetFontList.FirstOrDefault(temp => temp.mTag == CurrentPresetFont.ValueStr);
            if (item == null) return;

            item.mFontFamily = new FontFamily(CurrentFontFamily.ValueStr);

            if (CurrrentFontWeightStyle.ValueStr == "Bold")
            {
                item.mFontStyle = FontStyles.Normal;
                item.mFontWeight = FontWeights.Bold;
            }
            else if (CurrrentFontWeightStyle.ValueStr == "Regular")
            {
                item.mFontStyle = FontStyles.Normal;
                item.mFontWeight = FontWeights.Normal;
            }
            else if (CurrrentFontWeightStyle.ValueStr == "Italic")
            {
                item.mFontStyle = FontStyles.Italic;
                item.mFontWeight = FontWeights.Normal;
            }
            else
            {
                item.mFontStyle = FontStyles.Italic;
                item.mFontWeight = FontWeights.Bold;
            }

            item.mFontSize = (int)CurrentFontSize.Value;

            CurrentPresetFont = new ComboDataItem(item.mTag, item.mTagContent);
            SelectedPresetFont();
          

        }

        //重置定义
        private void RestoreDefaultStyle()
        {
            var defaultlists = TextFont.GetPresetFontStyle();
            if (CurrentPresetFont.ValueStr != "Custom")
            {
                var defaulItem = defaultlists.FirstOrDefault(temp => temp.mTag ==CurrentPresetFont.ValueStr);
                if (defaulItem != null)
                {
                    var currentItem = PresetFontList.FirstOrDefault(temp => temp.mTag == CurrentPresetFont.ValueStr);
                    if (currentItem != null)
                    {
                        currentItem.mTagContent = defaulItem.mTagContent;
                        currentItem.mFontStyle = defaulItem.mFontStyle;
                        currentItem.mFontWeight = defaulItem.mFontWeight;
                        currentItem.mFontFamily = defaulItem.mFontFamily;
                        currentItem.mFontSize = defaulItem.mFontSize;
                        GetCurrentFontFamily(currentItem.mFontFamily.ToString(), currentItem.mFontFamily.ToString());
                       GetCurrentFontSize(currentItem.mFontSize);
                        GetFontWeights_Style(currentItem.mFontStyle, currentItem.mFontWeight);
                        CurrentPresetFont = new ComboDataItem(defaulItem.mTag, defaulItem.mTagContent);
                        SelectedPresetFont();
                    }
                }
            }

        }

        //设置多选对齐方式
        private void LayoutAlignChecked(object obj)
        {
            if (obj != null)
            {
                if (obj != null)
                {
                    switch ((string)obj)
                    {
                        case "AlignLeft":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignLeft);
                            break;
                        case "AlignHorizonCenter":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignHorizonCenter);
                            break;
                        case "AlignRight":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignRight);
                            break;
                        case "DistributeHorizontal":
                            PDFViewer.SetPDFEditAligment(AlignModes.DistributeHorizontal);
                            break;
                        case "AlignTop":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignTop);
                            break;
                        case "AlignVerticalCenter":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignVerticalCenter);
                            break;
                        case "AlignBottom":
                            PDFViewer.SetPDFEditAligment(AlignModes.AlignBottom);
                            break;
                        case "DistributeVertical":
                            PDFViewer.SetPDFEditAligment(AlignModes.DistributeVertical);
                            break;
                    }

                }
            }
        }


        //设置文本框内对齐方式
        private void TextAlignChecked(object obj)
        {
            if ((string)obj != null && TextEditEvent != null)
            {
                switch ((string)obj)
                {
                    case "AlignLeft":
                        GetAnnotAlign(TextAlignment.Left);
                        TextEditEvent.TextAlign = ComPDFKit.PDFPage.Edit.TextAlignType.AlignLeft;
                        break;

                    case "AlignCenter":
                        GetAnnotAlign(TextAlignment.Center);
                        TextEditEvent.TextAlign = ComPDFKit.PDFPage.Edit.TextAlignType.AlignMiddle;
                        break;

                    case "AlignRight":
                        GetAnnotAlign(TextAlignment.Right);
                        TextEditEvent.TextAlign = ComPDFKit.PDFPage.Edit.TextAlignType.AlignRight;
                        break;

                    case "Align":
                        GetAnnotAlign(TextAlignment.Justify);
                        TextEditEvent.TextAlign = ComPDFKit.PDFPage.Edit.TextAlignType.AlignNone;
                        break;
                }
                TextAlign = TextEditEvent.TextAlign;
                TextEditEvent.UpdatePDFEditByEventArgs();
            }
        }

        //设置文本内容对齐属性面板显示
        private void GetAnnotAlign(TextAlignment align)
        {
            switch (align)
            {
                case TextAlignment.Left:
                    StrTextAlign = "Left";
                    break;

                case TextAlignment.Center:
                    StrTextAlign = "Center";
                    break;

                case TextAlignment.Right:
                    StrTextAlign = "Right";
                    break;

                case TextAlignment.Justify:
                    StrTextAlign = "Justify";
                    break;

                default:
                    StrTextAlign = "None";
                    break;
            }
        }

        //设置文本颜色
        private void SelectedColor(object obj)
        {
            if (obj != null)
            {
                var colorValue = (Color)obj;
                if (colorValue != null)
                {
                    SelectColor = new SolidColorBrush(colorValue);

                }
            }
        }

        //设置文本样式
        private void SelectedFontStyle(object obj)
        {
            if (obj != null && (PresetFontItem)obj != null)
            {
                var item = (PresetFontItem)obj;

            }
        }


        //设置字体大小
        private void FontSizeChanged(object obj)
        {
            if (CurrentFontSize != null)
            {
                CurrentFontSize = new ComboDataItem(TextEditEvent.FontSize);
            }
            if (CurrentPresetFont != null)
            {
                var currentItem = PresetFontList.FirstOrDefault(temp => temp.mTag == CurrentPresetFont.ValueStr);
                if (currentItem.mTag != "Custom")
                {
                    foreach (var item in PresetFontList)
                    {
                        if (item.mTag == currentItem.mTag)
                        {
                            if (CurrentFontSize.Value != item.mFontSize)
                            {
                                string txt = string.Format($" * {currentItem.mTagContent}");

                                if (Title == txt)
                                {
                                    Title = "";
                                }
                                Title = txt;
                                break;
                            }
                            else
                            {
                                if (FontWeightItem == item.mFontWeight && FontStyleItem == item.mFontStyle && CurrentFontSize.Value == item.mFontSize && CurrentFontFamily.ValueStr == item.mFontFamily.Source)
                                {
                                    string txt = currentItem.mTagContent;

                                    if (Title == txt)
                                    {
                                        Title = "";
                                    }
                                    Title = txt;
                                }
                            }
                        }
                    }
                }
            }
        }


        #endregion

        #region 右键菜单

        //点击空白处时
        private ContextMenu EmptyStateMenu(object sender)
        {
            var popMenu = App.Current.FindResource("NoneMenu") as ContextMenu;
            CustomPopMenu customMenu = new CustomPopMenu(popMenu, sender);
            //粘贴
            customMenu.SetMenuBinding(0, ApplicationCommands.Paste);
            //添加文本
            customMenu.SetMenuBinding(1, AddTextCommand);
            //添加图像
            customMenu.SetMenuBinding(2, AddImgCommand);

            return popMenu;
        }


        #endregion


        #region 编辑PDF内容触发的事件

        /// <summary>
        /// 右键菜单的事件
        /// </summary>
        private void PDFViewer_PDFEditCommandHandler(object sender, PDFEditCommand e)
        {

            if (e == null)
                return;

            switch (e.CommandType)
            {
                case CommandType.Context:
                    if (e.EditType == ComPDFKit.PDFPage.CPDFEditType.None)
                    {
                        e.PopupMenu = EmptyStateMenu(sender);

                    }
                    break;

                default:
                    e.DoCommand();
                    break;

            }
            if (e.PopupMenu != null)
            {
                e.Handle = true;
            }
        }

        /// <summary>
        /// 更多菜单
        /// </summary>
        /// <param name="isEnable"></param>
        /// <returns></returns>
        private ContextMenu SelectAnnotContextMenu(bool isEnable)
        {
            var popMenu = App.Current.FindResource("CustomFontStyleFlyoutMenu") as ContextMenu;
            if (popMenu != null && popMenu.Items.Count == 2)
            {
                //用所选部分重新定义
                MenuItem menuItem = popMenu.Items[0] as MenuItem;
                menuItem.IsEnabled = isEnable;
                menuItem.Command = ReDefineFontStyleCommand;
                //恢复默认预设样式
                menuItem = popMenu.Items[1] as MenuItem;
                menuItem.IsEnabled = isEnable;
                menuItem.Command = RestoreDefaultStyleCommand;
            }
            return popMenu;
        }
        #endregion

        protected List<PDFEditEvent> TextEditEventList;
        public void OnNavigatedTo(NavigationContext navigationContext)
        {

            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            navigationContext.Parameters.TryGetValue<List<PDFEditEvent>>(ParameterNames.AnnotEvent, out TextEditEventList);
            if (PDFViewer != null)
            {
               
                if (TextEditEventList != null && TextEditEventList.Count > 0)
                {
                    TextEditEvent = TextEditEventList[0];
                    GetPDFEdit();
                    if (TextEditEventList.Count > 1)
                        IsSelectedEmpty = true;
                    else
                        IsSelectedEmpty = false;

                    if (TextEditEventList.Count == 2)
                    {
                        IsLayoutAlign = true;
                        IsLayoutAvgAlign = false;
                    }
                    else if (TextEditEventList.Count > 2)
                    {
                        IsLayoutAlign = true;
                        IsLayoutAvgAlign = true;
                    }
                    else
                    {
                        IsLayoutAlign = false;
                        IsLayoutAvgAlign = false;
                    }
                }

                PDFViewer.PDFEditCommandHandler -= PDFViewer_PDFEditCommandHandler;
                PDFViewer.PDFEditCommandHandler += PDFViewer_PDFEditCommandHandler;
                ChangedValue -= FontMode_ChangedValue;
                ChangedValue += FontMode_ChangedValue;
                IsCanSave = true;
            }
        }

        //文本内容改变触发
        private void FontMode_ChangedValue(object sender, FontSetModeType e)
        {
            if (sender != null)
            {
                switch (e)
                {
                    case FontSetModeType.PresetFontStyes:
                        if (PresetFontList != null && sender is string == true)
                        {
                            var item = PresetFontList.FirstOrDefault(temp => temp.mTag == (string)sender);
                            if (item != null && TextEditEvent != null)
                            {
                                if (TextEditEventList.Count == 1 && IsSelectedEmpty == false)
                                {
                                    TextEditEvent.FontName = item.mFontFamily != null ? item.mFontFamily.Source : string.Empty;
                                    TextEditEvent.FontSize = item.mFontSize;
                                    TextEditEvent.IsBold = item.mFontWeight == FontWeights.Bold;
                                    TextEditEvent.IsItalic = item.mFontStyle == FontStyles.Italic;
                                    TextEditEvent.UpdatePDFEditByEventArgs();
                                }
                                else
                                {
                                    foreach (var itemlist in TextEditEventList)
                                    {
                                        itemlist.FontName = item.mFontFamily != null ? item.mFontFamily.Source : string.Empty;
                                        itemlist.FontSize = item.mFontSize;
                                        itemlist.IsBold = item.mFontWeight == FontWeights.Bold;
                                        itemlist.IsItalic = item.mFontStyle == FontStyles.Italic;
                                        itemlist.UpdatePDFEditByEventArgs();
                                    }
                                }

                            }
                        }
                        break;
                    case FontSetModeType.FontFamilys:
                        if (sender is string == true)
                        {
                            TextEditEvent.FontName = (string)sender;
                            TextEditEvent.UpdatePDFEditByEventArgs();
                        }
                        break;
                    case FontSetModeType.FontSizes:
                        if (sender is double == true && (double)sender > 0 && TextEditEvent.FontSize > 0)
                        {
                            TextEditEvent.FontSize = (double)sender;
                            TextEditEvent.UpdatePDFEditByEventArgs();
                        }
                        break;
                    case FontSetModeType.FontWeight_Style:
                        UpdateFontWeight_Style();
                        TextEditEvent.IsBold = FontWeightItem == FontWeights.Bold;
                        TextEditEvent.IsItalic = FontStyleItem == FontStyles.Italic;
                        TextEditEvent.UpdatePDFEditByEventArgs();
                        break;
                    case FontSetModeType.FontColor:
                        if (sender is Color == true)
                        {
                            var setColor = (Color)sender;
                            var eventColor = TextEditEvent.FontColor;

                            bool isok = eventColor.A != setColor.A || eventColor.B != setColor.B ||
                                 eventColor.G != setColor.G || eventColor.R != setColor.R;

                            if (isok)
                            {
                                TextEditEvent.FontColor = setColor;
                                TextEditEvent.UpdatePDFEditByEventArgs();
                            }
                        }

                        break;

                    case FontSetModeType.TextAlignment:
                        break;
                }
            }
        }

        //获取文本参数
        private void GetPDFEdit()
        {

            SelectColor = new SolidColorBrush(TextEditEvent.FontColor);
            CurrentFontSize =new ComboDataItem(TextEditEvent.FontSize);
            
            CurrentFontFamily = new ComboDataItem(TextEditEvent.FontName, TextEditEvent.FontName);
            FontStyleItem = TextEditEvent.IsItalic ? FontStyles.Italic : FontStyles.Normal;
            FontWeightItem = TextEditEvent.IsBold ? FontWeights.Bold : FontWeights.Normal;
            GetFontWeights_Style(FontStyleItem, FontWeightItem);
         
            //判断样式列表中是否存在对应样式
            bool isExist = false;
            foreach (var item in PresetFontList)
            {
                if (TextEditEvent.FontSize == item.mFontSize && TextEditEvent.IsBold == (item.mFontWeight == FontWeights.Bold) && TextEditEvent.IsItalic == (item.mFontStyle == FontStyles.Italic)
                    && (TextEditEvent.FontName == item.mFontFamily.Source || TextEditEvent.FontName == "Arial" && item.mFontFamily.Source == "Helvetica")
                    )
                {
                    if (item.mTag != "Custom")
                    {
                        CurrentPresetFont = new ComboDataItem(item.mTag, item.mTagContent);
                        isExist = true;
                    }

                    break;
                }
            }
            if (isExist == false)
            {
                FontVm.CurrentPresetFont = new ComboDataItem("Custom", "Custom");

                CurrentPresetFont = new ComboDataItem("Custom", "Custom");
                GetCurrentFontSize((int)TextEditEvent.FontSize);

                if (TextEditEvent.FontName == ""|| TextEditEvent.FontName == null)
                {
                    GetCurrentFontFamily("Helvetica", "Helvetica");
                }
                else
                {
                    GetCurrentFontFamily(TextEditEvent.FontName, TextEditEvent.FontName);
                }
                GetFontWeights_Style(TextEditEvent.IsItalic ? FontStyles.Italic : FontStyles.Normal, TextEditEvent.IsBold ? FontWeights.Bold : FontWeights.Normal);
            }
            else
            {
                if (CurrentPresetFont != null)
                {
                    var itemComboxItem = CurrentPresetFont;

                    var item = PresetFontList.FirstOrDefault(temp => temp.mTag == itemComboxItem.ValueStr);
                    if (item != null)
                    {
                        if (item.mTag != "Custom")
                        {
                            GetCurrentFontSize(item.mFontSize);
                            if (item.mFontFamily != null)
                            {
                                GetCurrentFontFamily(item.mFontFamily.ToString(), item.mFontFamily.ToString());
                            }
                            GetFontWeights_Style(TextEditEvent.IsItalic ? FontStyles.Italic : FontStyles.Normal, TextEditEvent.IsBold ? FontWeights.Bold : FontWeights.Normal);
                        }
                      
                    }
                }
            }
            //初始化传入的对齐方式
            switch (TextEditEvent.TextAlign.ToString())
            {
                case "AlignLeft":
                    GetAnnotAlign(TextAlignment.Left);
                    break;

                case "AlignCenter":
                    GetAnnotAlign(TextAlignment.Center);
                    break;

                case "AlignRight":
                    GetAnnotAlign(TextAlignment.Right);
                    break;

                case "Align":
                    GetAnnotAlign(TextAlignment.Justify);
                    break;
            }
            TextAlign = TextEditEvent.TextAlign;
            TextEditEvent.UpdatePDFEditByEventArgs();
        
    }

        public bool IsNavigationTarget(NavigationContext navigationContext) { return true; }


        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            IsCanSave = false;
            TextEditEvent = null;
            IsSelectedEmpty = false;
            ClearCheckedAglin?.Invoke(null, null);
            PDFViewer.PDFEditCommandHandler -= PDFViewer_PDFEditCommandHandler;
            ChangedValue -= FontMode_ChangedValue;
        }

    }
}