PDFOffice_Windows_exe/PDF Office/ViewModels/PropertyPanel/AnnotPanel/StickyNotePopupViewModel.cs

using ComPDFKitViewer.AnnotEvent;
using ComPDFKitViewer.PdfViewer;
using PDF_Office.Model;
using PDF_Office.Properties;
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;

namespace PDF_Office.ViewModels.PropertyPanel.AnnotPanel
{
    internal class StickyNotePopupViewModel : BindableBase, INavigationAware
    {
        private string authorText;

        public string AuthorText
        {
            get { return authorText; }
            set
            {
                SetProperty(ref authorText, value);
            }
        }

        private string dateText;

        public string DateText
        {
            get { return dateText; }
            set
            {
                SetProperty(ref dateText, value);
            }
        }

        private string contentText;

        public string ContentText
        {
            get { return contentText; }
            set
            {
                SetProperty(ref contentText, value);
            }
        }

        private ViewContentViewModel ViewContentViewModel;
        private StickyAnnotArgs StickyAnnotArgs;
        private AnnotCommandArgs AnnotCommandArgs;
        private CPDFViewer PDFViewer;
        public DelegateCommand<object> ContentTextLostFocus { get; set; }

        public StickyNotePopupViewModel()
        {
            ContentTextLostFocus = new DelegateCommand<object>(ContentText_LostFocus);
        }

        private void ContentText_LostFocus(object obj)
        {
            if (ViewContentViewModel == null || StickyAnnotArgs == null || PDFViewer == null || AnnotCommandArgs == null)
            {
                return;
            }
            if (string.IsNullOrEmpty(ContentText))
            {
                ViewContentViewModel.IsNoteAdd = false;
                return;
            }
            StickyAnnotArgs.StickyNote = ContentText;
            PDFViewer.CreatePageAnnot(AnnotCommandArgs.PageIndex, StickyAnnotArgs);
            ViewContentViewModel.IsNoteAdd = false;
        }

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

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            if(StickyAnnotArgs != null && string.IsNullOrEmpty(StickyAnnotArgs.Content))
            {
                PDFViewer.RemovePageAnnot(StickyAnnotArgs.PageIndex, StickyAnnotArgs.AnnotIndex);
            }
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            navigationContext.Parameters.TryGetValue<ViewContentViewModel>(ParameterNames.ViewContentViewModel, out ViewContentViewModel);
            navigationContext.Parameters.TryGetValue<StickyAnnotArgs>(ParameterNames.StickyAnnotArgs, out StickyAnnotArgs);
            navigationContext.Parameters.TryGetValue<AnnotCommandArgs>(ParameterNames.AnnotCommandArgs, out AnnotCommandArgs);
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            SetToolParam();
            AuthorText = Settings.Default.AppProperties.Description.Author;
            DateText = DateTime.Now.ToString("MM/dd/yyyy  hh:mm:ss");
        }

        private void SetToolParam()
        {
            if(PDFViewer != null && StickyAnnotArgs != null && string.IsNullOrEmpty(StickyAnnotArgs.Content))
            {
                PDFViewer.SetToolParam(StickyAnnotArgs);
            }
        }
    }
}