PDFOffice_Windows_exe/PDF Office/Views/ViewContent.xaml.cs

using ComPDFKitViewer;
using ComPDFKitViewer.PdfViewer;
using PDF_Master.EventAggregators;
using PDF_Master.Helper;
using PDF_Master.Model;
using PDF_Master.ViewModels;
using PDF_Master.ViewModels.PropertyPanel.ViewModular;
using PDF_Master.ViewModels.Tools;
using PDF_Master.Views.Dialog;
using PDF_Master.Views.PropertyPanel.ViewModular;
using PDF_Master.Views.Tools;
using Prism.Events;
using Prism.Regions;
using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Threading;

namespace PDF_Master.Views
{
    /// <summary>
    /// Interaction logic for ViewContent
    /// </summary>
    public partial class ViewContent : UserControl
    {
        private ViewContentViewModel viewModel = null;

        private string unicode = "";

        /// <summary>
        /// 是否是展开工具栏
        /// </summary>
        private bool expandToolRow = true;
        public ViewContent()
        {
            InitializeComponent();
            unicode = App.mainWindowViewModel.SelectedItem.Unicode;
            viewModel = (ViewContentViewModel)this.DataContext;

            viewModel.PropertyChanged += ViewModel_PropertyChanged;
        }

        private void ViewModel_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            if (e.PropertyName == "OpenBOTA")
            {
                if (!viewModel.OpenBOTA)
                {
                    //动态改变BOTA的最小宽度只能在这里设置，VM里绑定会有异常
                    BOTACloumn.MinWidth = 48;
                    viewModel.BOTAWidth = new GridLength(48);
                    BOTASplitter.Visibility = Visibility.Collapsed;
                }
                else
                {
                    BOTACloumn.MinWidth = 260;
                    BOTASplitter.Visibility = Visibility.Visible;
                }
            }
        }

        public ViewContent(IEventAggregator eventAggregator) : this()
        {
            eventAggregator.GetEvent<SplitEvent>().Subscribe(ChangeSplitModeUI, e => e.Unicode == unicode);

            eventAggregator.GetEvent<ReadModeEvent>().Subscribe(ChangeReadModeUI, e => e.Unicode == unicode);

            eventAggregator.GetEvent<ReadModePropertyOpenEvent>().Subscribe(ChangeReadModePropertyOpenUI, e => e.Unicode == unicode);
        }

        private void ChangeReadModePropertyOpenUI(ReadModePropertyOpenArgs obj)
        {
            Grid.SetColumnSpan(GridViewer, 3);
            Grid.SetColumn(GridViewer, 0);
            Grid.SetColumn(Scroller, 4);
        }

        private void ChangeReadModeUI(ReadModeArgs obj)
        {
            if (obj.IsReadMode)
            {
                ReadModeContent.Visibility = Visibility.Visible;
                RectangleReadMode.Visibility = Visibility.Collapsed;
                //因为ispropertyOpen 属性改成了单向控制  因此这里的语句不再适用
                //this.TbtnProperty.IsChecked = false;
                Grid.SetRowSpan(DocumentView, 4);
                Grid.SetRow(DocumentView, 0);
                Grid.SetColumnSpan(GridViewer, 4);
                Grid.SetColumn(GridViewer, 0);
            }
            else
            {
                ReadModeContent.Visibility = Visibility.Collapsed;
                RectangleReadMode.Visibility = Visibility.Collapsed;
                //this.TbtnProperty.IsChecked=true;
                Grid.SetRowSpan(DocumentView, 1);
                Grid.SetRow(DocumentView, 2);
                Grid.SetColumn(GridViewer, 2);
                Grid.SetColumnSpan(GridViewer, 1);

            }
        }

        /// <summary>
        /// 鼠标移动到控件范围时显示控件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void RectangleReadMode_MouseEnter(object sender, MouseEventArgs e)
        {
            //Dispatcher.BeginInvoke(DispatcherPriority.Send, new Action(delegate
            //{
            if (viewModel.mainViewModel.IsBookMode)
            {
                this.ReadModeContent.Visibility = Visibility.Visible;
                this.RectangleReadMode.Visibility = Visibility.Collapsed;
            }
            //}));
        }

        /// <summary>
        /// 鼠标移开页面控件，三秒后隐藏该控件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private async void ReadModeContent_MouseLeave(object sender, MouseEventArgs e)
        {
            await System.Threading.Tasks.Task.Delay(3000);
            //Thread.Sleep(3000);
            this.ReadModeContent.Visibility = Visibility.Collapsed;
            this.RectangleReadMode.Visibility = Visibility.Visible;
        }

        /// <summary>
        /// 根据Vm事件通知处理分屏布局的事件
        /// </summary>
        /// <param name="e"></param>
        private void ChangeSplitModeUI(SplitEventArgs e)
        {
            switch (e.Mode)
            {
                case EventAggregators.SplitMode.Horizontal:
                    //水平分屏  上下
                    HorizontalSplitter.Visibility = Visibility.Visible;
                    VerticalSplitter.Visibility = Visibility.Collapsed;

                    RowRight.Height = new GridLength(1, GridUnitType.Star);
                    ColumnBottom.Width = new GridLength(0);

                    Grid.SetColumn(SplitPDFViewer, 0);
                    Grid.SetRow(SplitPDFViewer, 2);
                    break;

                case EventAggregators.SplitMode.Vertical:

                    HorizontalSplitter.Visibility = Visibility.Collapsed;
                    VerticalSplitter.Visibility = Visibility.Visible;
                    RowRight.Height = new GridLength(0);
                    ColumnBottom.Width = new GridLength(1, GridUnitType.Star);
                    Grid.SetColumn(SplitPDFViewer, 2);
                    Grid.SetRow(SplitPDFViewer, 0);
                    break;

                case EventAggregators.SplitMode.Single:
                default:
                    //退出分屏模式
                    HorizontalSplitter.Visibility = Visibility.Collapsed;
                    VerticalSplitter.Visibility = Visibility.Collapsed;
                    RowRight.Height = new GridLength(0, GridUnitType.Star);
                    ColumnBottom.Width = new GridLength(0, GridUnitType.Star);
                    break;
            }
            GridViewer.UpdateLayout();
        }

        /// <summary>
        /// 退出阅读模式
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void UserControl_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
        {
            if (Key.Escape == e.Key)
            {
                if (viewModel != null)
                {
                    if (viewModel.PDFViewer.MouseMode != MouseModes.PanTool)
                    {
                        if (this.ContentToolsBar.Content is AnnotToolContent annotTool)
                        {
                            if (annotTool.BtnSelecttool.IsChecked == true)
                            {
                                AnnotToolContentViewModel model = (AnnotToolContentViewModel)annotTool.DataContext;
                                if (model != null)
                                {
                                    if (model.SnapshotEditMenuViewModel.SnapToolArgs != null)
                                    {
                                        model.SnapshotEditMenuViewModel.SnapToolArgs.ReSnapshot();
                                    }
                                }
                            }
                        }
                        if (viewModel.mainViewModel.IsBookMode == true)
                        {
                            viewModel.Off_ReadModel();
                        }
                    }
                    else
                    {
                        if (viewModel.mainViewModel.IsBookMode == true)
                        {
                            viewModel.Off_ReadModel();
                        }
                    }
                }
            }
        }

        private void BtnFile_Initialized(object sender, EventArgs e)
        {
            BtnFile.ContextMenu = null;
        }

        private void BtnFile_Click(object sender, RoutedEventArgs e)
        {
            FileMenu.PlacementTarget = BtnFile;
            FileMenu.Placement = System.Windows.Controls.Primitives.PlacementMode.Bottom;
            FileMenu.IsOpen = true;
        }

        private void ContentControl_SizeChanged(object sender, SizeChangedEventArgs e)
        {
        }

        private void MenuRecent_Loaded(object sender, RoutedEventArgs e)
        {
            int count = 0;
            MenuRecent.Items.Clear();
            foreach (var file in Properties.Settings.Default.RecentOpenFiles)
            {
                MenuItem item = new MenuItem();
                item.Height = 32;
                item.Header = file.FileName;
                item.Tag = file.FilePath;
                item.ToolTip = file.FilePath;

                item.Click += RecentItem_Click;
                MenuRecent.Items.Insert(MenuRecent.Items.Count, item);

                count++;
                if (count >= 20)
                    break;
            }

            if (Properties.Settings.Default.RecentOpenFiles.Count > 0)
            {
                MenuRecent.Items.Add(Menu_Separator);
                MenuRecent.Items.Add(MenuDeleteAll);
                MenuDeleteAll.IsEnabled = true;
                MenuDeleteAll.Opacity = 1;
            }
            else
            {
                MenuRecent.Items.Add(MenuDeleteAll);
                MenuDeleteAll.IsEnabled = false;
                MenuDeleteAll.Opacity = 0.5;
            }
        }

        private void RecentItem_Click(object sender, RoutedEventArgs e)
        {
            var item = sender as MenuItem;
            string[] filePath = new string[1];
            filePath[0] = item.Tag.ToString();
            if (App.OpenedFileList.Contains(filePath[0]))
            {
                (this.DataContext as ViewContentViewModel).mainViewModel.mainWindowViewModel.SelectItem(filePath[0]);
            }
            else
            {
                (this.DataContext as ViewContentViewModel).mainViewModel.mainWindowViewModel.AddTabItem(filePath[0]);
            }
        }

        private void MenuDeleteAll_Click(object sender, RoutedEventArgs e)
        {
            SettingHelper.RemoveAllRecentOpenFiles();
        }

        private void UserControl_DragEnter(object sender, DragEventArgs e)
        {
            DragDropHelper.DragEnter(this, e);
        }

        private void UserControl_DragOver(object sender, DragEventArgs e)
        {
            DragDropHelper.DragOver(this, e);
        }

        private void UserControl_DragLeave(object sender, DragEventArgs e)
        {
            DragDropHelper.DragLeave();
        }

        private void UserControl_Drop(object sender, DragEventArgs e)
        {
            try
            {
                DragDropHelper.Drop(this, e);

                string[] file = (string[])e.Data.GetData(DataFormats.FileDrop);
                //页面编辑模式下 不响应拖拽打开文件
                if (file != null && file.Length > 0 && !(this.DataContext as ViewContentViewModel).isInPageEdit)
                {
                    App.mainWindowViewModel.AddTab.Execute();
                    (App.mainWindowViewModel.SelectedItem.DataContext as MainContentViewModel).homeContentViewModel.AddFileFromDrag(file.ToList());
                }
            }
            catch { }
        }

        private void CloseLeftCommand_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            BOTASplitter.Visibility = Visibility.Collapsed;
        }

        private void CloseRightCommand_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            viewModel.ClosePropertyCommand.Execute();
        }

        private void UserControl_Unloaded(object sender, RoutedEventArgs e)
        {
            viewModel.CloseAutoSave();
        }

        private void ToolTabControl_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            var visual = VisualTreeHelper.HitTest(ToolTabControl, e.GetPosition(ToolTabControl));
            if (visual == null)
            {
                return;
            }
            var item = CommonHelper.FindVisualParent<TabItem>(visual.VisualHit);
            if (item == null)
            {
                return;
            }

            //默认展开子工具栏
            //单击工具栏工具展开子工具栏；再次单击工具栏工具则收起子工具栏
            if (item.IsSelected)
            {
                expandToolRow = !expandToolRow;
                ToolRow.Height = expandToolRow ? new GridLength(40) : new GridLength(0);
            }
            else
            {
                if (ToolRow.Height == new GridLength(0))
                {
                    //点击其他菜单栏时,之前为折叠状态时，自动展开
                    expandToolRow = !expandToolRow;
                    ToolRow.Height = new GridLength(40);
                }
            }
        }

        private void UserControl_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            if((bool)e.NewValue)
            {
                //显示后自动聚焦，解决切换页签或者刚打开后直接按快捷键没响应的问题
                System.Windows.Application.Current.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Send, new Action(() =>
                {
                    ToolTabControl.Focus();
                }));
            }
        }

        private void AddTabCommand_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            viewModel.mainViewModel.mainWindowViewModel.AddTab.Execute();
        }

        private void CloseTabCommand_Executed(object sender, ExecutedRoutedEventArgs e)
        {
            viewModel.mainViewModel.CloseTab.Execute(null);
        }

        private void UserControl_MouseDown(object sender, MouseButtonEventArgs e)
        {
            //鼠标侧键无法在Xaml里绑定  因此写在后台代码里
            if(e.ChangedButton == MouseButton.XButton2)
            {
                if(GlobalCommands.PreViewCommand.CanExecute(null))
                {
                    GlobalCommands.PreViewCommand.Execute(null);
                }
            }
            else if(e.ChangedButton == MouseButton.XButton1)
            {
                if (GlobalCommands.NextViewCommand.CanExecute(null))
                {
                    GlobalCommands.NextViewCommand.Execute(null);
                }
            }
        }
    }
}