kmpdfkit_demo/compdfkit_demo_windows/compdfkit/compdfkit-tools/PDFView/PDFPageTurning/PDFPageTurningUI/CPDFPageTurningUI.xaml.cs

using ComPDFKit.NativeMethod;
using ComPDFKitViewer.PdfViewer;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace compdfkit_tools.PDFControlUI
{
    /// <summary>
    /// pdfpageturning.xaml 的交互逻辑
    /// </summary>
    public partial class CPDFPageTurningUI : UserControl, INotifyPropertyChanged
    {
        public Key EnsureKey { get; set; }

        /// <summary>
        /// 跳转指定页事件
        /// </summary>
        public event EventHandler<int> GoToSpecificPageEvent;

        /// <summary>
        /// 跳转下一页事件
        /// </summary>
        public event EventHandler GoToNextPageEvent;

        /// <summary>
        /// 跳转上一页事件
        /// </summary>
        public event EventHandler GoToPreviousPageEvent;

        /// <summary>
        /// 跳转首页
        /// </summary>
        public event EventHandler GoToFirstPageEvent;

        /// <summary>
        /// 跳转末页
        /// </summary>
        public event EventHandler GotoLastPageEvent;

        /// <summary>
        /// 当前页码
        /// </summary>
        private int _pageIndex = 1;
        public int PageIndex
        {
            get { return _pageIndex; }
            set
            {
                if (_pageIndex != value)
                {
                    _pageIndex = value;
                    OnPropertyChanged(nameof(PageIndex));
                }
            }
        }


        public CPDFPageTurningUI()
        {
            InitializeComponent();
            DataContext = this;
        }


        /// <summary>
        /// 回车跳转指定页
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void PageIndexTexBox_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == EnsureKey)
            { 
                GoToSpecificPageEvent?.Invoke(sender, PageIndex);
            }
        }

        private void GoToPreviousPageButton_Click(object sender, RoutedEventArgs e)
        {
            GoToPreviousPageEvent?.Invoke(sender, e);
        }

        private void GoToNextPageButton_Click(object sender, RoutedEventArgs e)
        {
            GoToNextPageEvent?.Invoke(sender, e);
        }

        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}