PDFOffice_Windows_exe/PDF Office/ViewModels/Dialog/PageEditDialogs/SplitDialogViewModel.cs

using ComPDFKitViewer.PdfViewer;
using PDF_Master.CustomControl;
using PDF_Master.Helper;
using PDF_Master.Model;
using PDF_Master.Model.HomePageToolsDialogs;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PDF_Master.ViewModels.Dialog.PageEditDialogs
{
    public class SplitDialogViewModel : BindableBase, IDialogAware
    {
        public string Title => "";

        private CPDFViewer pdfViewer;
        private int listSelectedIndex;
        private double pageCount;

        //页面总数
        public double PageCount
        {
            get { return pageCount; }
            set
            {
                SetProperty(ref pageCount, value);
            }
        }

        private string customPageText;

        /// <summary>
        /// 自定义的输入内容
        /// </summary>
        public string CustomPageText
        {
            get { return customPageText; }
            set
            {
                SetProperty(ref customPageText, value);
            }
        }

        private HomePageSplitDialogModel model;

        public HomePageSplitDialogModel Model
        {
            get { return model; }
            set
            {
                SetProperty(ref model, value);
            }
        }

        public event Action<IDialogResult> RequestClose;

        public DelegateCommand CancelCommand { get; set; }

        public DelegateCommand SplitCommnad { get; set; }

        public SplitDialogViewModel()
        {
            CancelCommand = new DelegateCommand(cancel);
            SplitCommnad = new DelegateCommand(split);

            Model = new HomePageSplitDialogModel();
        }

        private void cancel()
        {
            RequestClose.Invoke(new DialogResult(ButtonResult.Cancel));
        }

        private void split()
        {
            List<int> pages = new List<int>();
            Model.PageRange = customPageText;
            DialogParameters valuePairs = new DialogParameters();
            valuePairs.Add(ParameterNames.DataModel, Model);
            RequestClose.Invoke(new DialogResult(ButtonResult.OK, valuePairs));
        }

        #region

        public bool CanCloseDialog()
        {
            return true;
        }

        public void OnDialogClosed()
        {
        }

        public void OnDialogOpened(IDialogParameters parameters)
        {
            parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out pdfViewer);
            parameters.TryGetValue<int>(ParameterNames.ListSelectedIndex, out listSelectedIndex);
            if (pdfViewer != null)
            {
                PageCount = pdfViewer.Document.PageCount;
                Model.SourceFileName = System.IO.Path.GetFileName(pdfViewer.Document.FileName);
                //"拆分方式
                //若未选择要拆分的页面，则默认选中【平均每X页拆分为一个PDF文件】，默认参数为 1
                //若先选择了页面再点击【拆分】，则默认选中【按页面范围拆分】，默认参数为当前所选页面范围"
                if (listSelectedIndex == -1)
                {
                    Model.IsAveragePages = true;
                }
                else
                {
                    Model.IsCustomRange = true;
                }
            }
        }

        #endregion
    }
}