PDFOffice_Windows_exe/PDF Office/ViewModels/Tools/TextEditToolContentViewModel.cs

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

namespace PDF_Master.ViewModels.Tools
{
    public class TextEditToolContentViewModel: BindableBase, INavigationAware
    {
        #region 变量
        public ViewContentViewModel viewContentViewModel;
        private CPDFViewer PDFViewer;
        private IRegionManager regions;
        private Dictionary<string, string> btnToProperty = new Dictionary<string, string>();
        #endregion

        #region 属性
        private bool _isTextEdit = false;
        public bool IsTextEdit
        {
            get { return _isTextEdit; }
            set { SetProperty(ref _isTextEdit, value); }
        }
        private bool _isImgEdit = false;
        public bool IsImgEdit
        {
            get { return _isImgEdit; }
            set { SetProperty(ref _isImgEdit, value); }
        }
        #endregion

        #region Command
        // 添加文本、图像
        public DelegateCommand<object> AddContentCommand { get; set; }
        public DelegateCommand AddTextCommand { get; set; }
        public DelegateCommand AddImgCommand { get; set; }
        #endregion

        #region 初始化
        public TextEditToolContentViewModel(IRegionManager regionManager)
        {
            regions = regionManager;
            InitCommand();
            InitBtnToProperty();
        }
        private void InitCommand()
        {
            AddContentCommand = new DelegateCommand<object>(AddContent);
            AddTextCommand = new DelegateCommand(AddText);
            AddImgCommand = new DelegateCommand(AddImg);

        }

        private void InitBtnToProperty()
        {
            btnToProperty.Add("Text", "TextEditProperty");
            btnToProperty.Add("Image", "ImageEditProperty");
            btnToProperty.Add("TextAndImage", "ImageTextEditProperty");
            btnToProperty.Add("PropertyPanelContent", "PropertyPanelContent");
        }

        #endregion
        public void AddContent(object obj)
        {
            if (PDFViewer == null || obj == null || obj as CustomIconToggleBtn == null) return;

            var btn = obj as CustomIconToggleBtn;
            EnterEditMode((bool)btn.IsChecked, btn.Tag.ToString());
        }

        private void EnterEditMode(bool isCheckMode,string modeType)
        {
            if (isCheckMode)
            {
                if (modeType == "Text")
                {
                    IsImgEdit = false;
                    IsTextEdit = true;
                    PDFViewer.SetPDFEditCreateType(ComPDFKit.PDFPage.CPDFEditType.EditText);
                }
                else
                {
                    IsImgEdit = true;
                    IsTextEdit = false;
                    PDFViewer.SetPDFEditCreateType(ComPDFKit.PDFPage.CPDFEditType.EditImage);
                }
            }
            else
            {
                IsImgEdit = false;
                IsTextEdit = false;
                PDFViewer.SetPDFEditCreateType(ComPDFKit.PDFPage.CPDFEditType.None);
                PDFViewer.SetMouseMode(MouseModes.PDFEdit);
            }
        }

        #region Command功能

        private void AddText()
        {
            EnterEditMode(true, "Text");
        }

        private void AddImg()
        {
            EnterEditMode(true, "Image");
        }

        #endregion
        private void AddToPropertyPanel(string type,  List<PDFEditEvent> e)
        {
            if (btnToProperty.ContainsKey(type))
            {
                NavigationParameters parameters = new NavigationParameters();
                parameters.Add(ParameterNames.PDFViewer, PDFViewer);
                parameters.Add(ParameterNames.AnnotEvent, e);
                System.Windows.Application.Current.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Send, new Action(() =>
                {
                    regions.RequestNavigate(RegionNames.PropertyRegionName, btnToProperty[type], parameters);
                }));

                ShowPropertyPanel(true);
            }
        }
        private void ShowPropertyPanel(bool show = true)
        {
            viewContentViewModel.IsPropertyOpen = show;
        }

        private void PDFViewer_PDFEditActiveHandler(object sender, List<PDFEditEvent> e)
        {

            if (e != null && e.Count > 0)
            {
                bool isText = false;
                bool isImg = false;
                foreach (var item in e)
                {

                    if (item.EditType == ComPDFKit.PDFPage.CPDFEditType.EditImage)
                    {
                        isImg = true;
                    }

                    if (item.EditType == ComPDFKit.PDFPage.CPDFEditType.EditText)
                    {
                        isText = true;
                    }

                }


                if (isText == true && isImg == false)
                {
                    AddToPropertyPanel("Text", e);
                }
                if (isText == false && isImg == true)
                {
                    AddToPropertyPanel("Image", e);
                }
                if (isText == true && isImg == true)
                {
                    AddToPropertyPanel("TextAndImage", e);
                }
            }
            else
            {
                AddToPropertyPanel("PropertyPanelContent", null);
            }

        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            navigationContext.Parameters.TryGetValue<ViewContentViewModel>(ParameterNames.ViewContentViewModel, out viewContentViewModel);

            if (PDFViewer != null)
            {
                PDFViewer.PDFEditActiveHandler -= PDFViewer_PDFEditActiveHandler;
                PDFViewer.PDFEditActiveHandler += PDFViewer_PDFEditActiveHandler;

                PDFViewer.PDFEditCommandHandler -= PDFViewer_PDFEditCommandHandler;
                PDFViewer.PDFEditCommandHandler += PDFViewer_PDFEditCommandHandler;
            }
        }

        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)//点击空白区域
                    {
                        e.PopupMenu = EmptyStateMenu(sender);

                    }
                    break;
                default:
                    e.DoCommand();
                    break;

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

        //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;
        }

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

      
        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            IsImgEdit = false;
            IsTextEdit = false;
            PDFViewer.PDFEditActiveHandler -= PDFViewer_PDFEditActiveHandler;
            PDFViewer.PDFEditCommandHandler -= PDFViewer_PDFEditCommandHandler;
            ShowPropertyPanel(false);
        }

    }
}