页面编辑-补充删除功能

PDF Office/Helper/CommonHelper.cs

@@ -8,6 +8,12 @@ using System.Windows.Media;
 
 namespace PDF_Office.Helper
 {
+    /// <summary>
+    /// 1 FindVisualParent 查找目标类型的父类控件
+    /// 2 FindVisualChild  查找目标类型的子类控件
+    /// 3 GetPageParmFromList  从页码集合获取页码字符串，如1，2，3 转换成1-3
+    /// 4 GetPagesInRange 校验PageRange 输入是否合法，且可返回List<int> Pages  存放的索引值
+    /// </summary>
     public static class CommonHelper
     {
         /// <summary>
@@ -113,18 +119,18 @@ namespace PDF_Office.Helper
         /// <summary>
         /// 校验PageRange 输入是否合法，且可返回List<int> Pages  存放的索引值
         /// </summary>
-        /// <param name="pageList">返回的页面集合</param>
+        /// <param name="pageIndexList">返回的页面索引集合</param>
         /// <param name="pageRange">需要判断的文本</param>
         /// <param name="count">页面总数</param>
         /// <param name="enumerationSeparator">例 new char[] { ',' }</param>
         /// <param name="rangeSeparator">例 new char[] { '-' }</param>
         /// <param name="inittag"></param>
         /// <returns></returns>
-        public static bool GetPagesInRange(ref List<int> pageList, string pageRange, int count, char[] enumerationSeparator, char[] rangeSeparator, bool inittag = false)
+        public static bool GetPagesInRange(ref List<int> pageIndexList, string pageRange, int count, char[] enumerationSeparator, char[] rangeSeparator, bool inittag = false)
         {
             string[] rangeSplit = pageRange.Split(enumerationSeparator);//根据分隔符 拆分字符串
 
-            pageList.Clear();
+            pageIndexList.Clear();
 
             foreach (string range in rangeSplit)
             {
@@ -150,12 +156,12 @@ namespace PDF_Office.Helper
 
                             for (int i = start; i <= end; ++i)
                             {
-                                if (pageList.Contains(i))
+                                if (pageIndexList.Contains(i))
                                 {
                                     return false;
                                 }
 
-                                pageList.Add(i - 1);
+                                pageIndexList.Add(i - 1);
                             }
                             continue;
                         }
@@ -179,11 +185,11 @@ namespace PDF_Office.Helper
                 {
                     return false;
                 }
-                if (pageList.Contains(pageNr))
+                if (pageIndexList.Contains(pageNr))
                 {
                     return false;
                 }
-                pageList.Add(pageNr - 1);
+                pageIndexList.Add(pageNr - 1);
             }
             return true;
         }

PDF Office/ViewModels/PageEdit/PageEditContentViewModel.cs

@@ -49,6 +49,19 @@ namespace PDF_Office.ViewModels.PageEdit
         public ObservableCollection<string> PageRangeItems { get; set; }
 
         #region 属性
+        private Visibility showTip;
+        /// <summary>
+        /// 是否显示渐隐提示
+        /// </summary>
+        public Visibility ShowTip
+        {
+            get { return showTip; }
+            set
+            {
+                SetProperty(ref showTip, value);
+            }
+        }
+
         private int listSelecedIndex;
         /// <summary>
         /// 缩略图选中项的索引
@@ -94,6 +107,10 @@ namespace PDF_Office.ViewModels.PageEdit
             set
             {
                 SetProperty(ref tbPageRangeVisibility, value);
+                if(value==Visibility.Visible)
+                {
+                    comboxSelectIndex = -1;
+                }
             }
         }
 
@@ -138,25 +155,188 @@ namespace PDF_Office.ViewModels.PageEdit
         /// 响应键盘回车事件
         /// </summary>
         public DelegateCommand<object> KeyDown { get; set; }
+
+        /// <summary>
+        /// 替换文件
+        /// </summary>
+        public DelegateCommand ReplaceCommand { get; set; }
+
+        /// <summary>
+        /// 插入文件命令
+        /// </summary>
+        public DelegateCommand InsertCommand { get; set; }
+
+        /// <summary>
+        /// 拆分文件
+        /// </summary>
+        public DelegateCommand SplitCommand { get; set; }
+
+        /// <summary>
+        /// 提取文件
+        /// </summary>
+        public DelegateCommand ExtractCommand { get; set; }
+
+        /// <summary>
+        /// 逆时针旋转
+        /// </summary>
+        public DelegateCommand LeftRotateCommand { get; set; }
+
+        /// <summary>
+        /// 顺时针旋转
+        /// </summary>
+        public DelegateCommand RightRotateCommand { get; set; }
+
+        /// <summary>
+        /// 删除
+        /// </summary>
+        public DelegateCommand DeleteCommand { get; set; }
+
+        /// <summary>
+        /// 倒序
+        /// </summary>
+        public DelegateCommand ReverseCommand { get; set; }
         #endregion
 
         public PageEditContentViewModel(IDialogService dialogService, IEventAggregator eventAggregator)
         {
+            //变量初始化
             dialogs = dialogService;
             eventor = eventAggregator;
             unicode = App.mainWindowViewModel.SelectedItem.Unicode;
             PageEditItems = new ObservableCollection<PageEditItem>();
             PageRangeItems = new ObservableCollection<string>();
 
-            eventAggregator.GetEvent<PageEditRefreshEvent>().Subscribe(OnPageEditRefreshEvent, e => e.Unicode == unicode);
-
+            //绑定命令
             SelectionChangedCommand = new DelegateCommand<object>(SelectionChangedEvent);
+            PreviewKeyDown = new DelegateCommand<object>(PreviewKeyDownEvent);
+            KeyDown = new DelegateCommand<object>(KeyDownEvent);
+            
+            SplitCommand = new DelegateCommand(SplitCommandEvent);
+            InsertCommand = new DelegateCommand(InsertCommandEvent);
+            ReplaceCommand = new DelegateCommand(ReplaceCommandEvent,CanFileCommandExcute).ObservesProperty(() => ListSelectedIndex);
+            ExtractCommand = new DelegateCommand(ExtractCommandEvent,CanFileCommandExcute).ObservesProperty(() => ListSelectedIndex);
+            DeleteCommand = new DelegateCommand(DeleteCommandEvent, CanFileCommandExcute).ObservesProperty(() => ListSelectedIndex);
+            LeftRotateCommand = new DelegateCommand(LeftRotateCommandEvent, CanFileCommandExcute).ObservesProperty(() => ListSelectedIndex);
+            RightRotateCommand = new DelegateCommand(RightRotateCommandEvent, CanFileCommandExcute).ObservesProperty(() => ListSelectedIndex);
+            ReverseCommand = new DelegateCommand(ReverseCommandEvent,CanFileCommandExcute).ObservesProperty(() => ListSelectedIndex);
+
+            //订阅页面刷新事件
+            eventAggregator.GetEvent<PageEditRefreshEvent>().Subscribe(OnPageEditRefreshEvent, e => e.Unicode == unicode);
 
             RefreshPageRangeItem();
         }
 
 
         #region 事件
+        /// <summary>
+        /// 替换功能的逻辑
+        /// </summary>
+        private void ReplaceCommandEvent()
+        {
+
+        }
+
+        /// <summary>
+        /// 拆分功能的逻辑
+        /// </summary>
+        private void SplitCommandEvent()
+        {
+
+        }
+
+        /// <summary>
+        /// 提取功能的逻辑
+        /// </summary>
+        private void ExtractCommandEvent()
+        {
+
+        }
+
+        /// <summary>
+        /// 插入功能的逻辑
+        /// </summary>
+        private void InsertCommandEvent()
+        {
+
+        }
+
+        /// <summary>
+        /// 删除选中页面
+        /// </summary>
+        private void DeleteCommandEvent()
+        {
+            List<int> indexList = new List<int>();
+            for(int i=0;i<PageEditItems.Count;i++)
+            {
+                if(PageEditItems[i].Selected)
+                {
+                    indexList.Add(i);
+                }
+            }
+
+            var result = PDFViewer.Document.RemovePages(indexList.ToArray());
+            if(!result)
+            {
+                ShowTip = Visibility.Visible;
+                return;
+            }
+
+            //文档层操作成功后再删除UI层
+            for(int i= indexList.Count-1; i>=0;i--)
+            {
+                PageEditItems.RemoveAt(indexList[i]);
+            }
+
+            RefreshPageNum();
+
+            PDFViewer.ReloadDocument();
+            
+            //清空undo栈，标记为可保存状态
+            PDFViewer.UndoManager.ClearHistory();
+            PDFViewer.UndoManager.CanSave = true;
+        }
+
+        /// <summary>
+        /// 左旋转页面的逻辑
+        /// </summary>
+        private void LeftRotateCommandEvent()
+        {
+
+        }
+
+        /// <summary>
+        /// 右旋转页面的逻辑
+        /// </summary>
+        private void RightRotateCommandEvent()
+        {
+
+        }
+
+        /// <summary>
+        /// 页面倒序的逻辑
+        /// </summary>
+        private void ReverseCommandEvent()
+        {
+
+        }
+
+        /// <summary>
+        /// 是否可以执行文件操作命令  除插入、拆分外
+        /// </summary>
+        /// <returns></returns>
+        private bool CanFileCommandExcute()
+        {
+            if(ListSelectedIndex<0)
+            {
+                return false;
+            }    
+            else
+            {
+                return true;
+            }
+        }
+
+
         /// <summary>
         /// 响应UI发送刷新图片的事件
         /// </summary>
@@ -165,19 +345,20 @@ namespace PDF_Office.ViewModels.PageEdit
         {
             //UI发送事件过来通知刷新图片时
             //调整逻辑,前后预加载5页
-            RefreshItemImage(e.PageRange.Item1 - 5, e.PageRange.Item2 + 5);
+            RefreshItemImage(e.PageRange.Item1 - 2, e.PageRange.Item2 + 2);
         }
 
         /// <summary>
-        /// 选项改变事件
+        /// 选项改变事件  
+        /// 虚拟化的时候不会触发选中事件
         /// </summary>
         /// <param name="e"></param>
         private void SelectionChangedEvent(object e)
         {
             var args = e as SelectionChangedEventArgs;
+            var listbox = args.OriginalSource as ListBox;
             if (TbPageRangeVisibility == Visibility.Visible&&args!=null)
             {
-                var listbox = args.OriginalSource as ListBox;
                 List<int> pagelist = new List<int>();
                 for(int i=0;i< listbox.SelectedItems.Count;i++)
                 {
@@ -202,6 +383,12 @@ namespace PDF_Office.ViewModels.PageEdit
 
                 string pageparm = CommonHelper.GetPageParmFromList(pagelist);
                 TbPageRange = pageparm;
+
+              
+            }
+            if (listbox.SelectedItem != null)
+            {
+                listbox.ScrollIntoView(listbox.SelectedItem);
             }
         }
 
@@ -217,7 +404,7 @@ namespace PDF_Office.ViewModels.PageEdit
                 return;
             }
 
-            if (args.Key !=Key.OemComma && args.Key !=Key.Subtract && !((args.Key>Key.D0&&args.Key<Key.D9)||(args.Key>Key.NumPad0&&args.Key<Key.NumPad9)))
+            if (args.Key!=Key.Enter&&args.Key!=Key.Back&&args.Key !=Key.OemComma && args.Key !=Key.Subtract && !((args.Key>=Key.D0&&args.Key<=Key.D9)||(args.Key>=Key.NumPad0&&args.Key<=Key.NumPad9)))
             {
                 args.Handled = true;
             }
@@ -229,29 +416,31 @@ namespace PDF_Office.ViewModels.PageEdit
         /// <param name="e"></param>
         private void KeyDownEvent(object e)
         {
-
             var args = e as KeyEventArgs;
             if(args==null)
             {
                 return;
             }
-            List<int> TargetPages = new List<int>();
-            var result = CommonHelper.GetPagesInRange(ref TargetPages, (args.OriginalSource as TextBox).Text, PDFViewer.Document.PageCount, new char[] { ',', '，' }, new char[] { '-' });
-            if(!result)
-            {
-                MessageBox.Show("请输入有效范围");
-            }
-
-            //选中输入的页面范围
-            for(int i=0;i<PageEditItems.Count;i++)
+            if (args.Key == Key.Enter)
             {
-                if(TargetPages.Contains(PageEditItems[i].PageNumber))
+                List<int> TargetPageIndexs = new List<int>();
+                var result = CommonHelper.GetPagesInRange(ref TargetPageIndexs, (args.OriginalSource as TextBox).Text, PDFViewer.Document.PageCount, new char[] { ',', '，' }, new char[] { '-' });
+                if (!result)
                 {
-                    PageEditItems[i].Selected = true;
+                    MessageBox.Show("请输入有效范围");
                 }
-                else
+
+                //选中输入的页面范围
+                for (int i = 0; i < PageEditItems.Count; i++)
                 {
-                    PageEditItems[i].Selected = false;
+                    if (TargetPageIndexs.Contains(PageEditItems[i].PageNumber-1))
+                    {
+                        PageEditItems[i].Selected = true;
+                    }
+                    else
+                    {
+                        PageEditItems[i].Selected = false;
+                    }
                 }
             }
         }
@@ -260,6 +449,17 @@ namespace PDF_Office.ViewModels.PageEdit
 
         #region 方法
 
+        /// <summary>
+        /// 刷新页码
+        /// </summary>
+        private void RefreshPageNum()
+        {
+            for(int i=0;i<PageEditItems.Count;i++)
+            {
+                PageEditItems[i].PageNumber = i + 1;
+            }
+        }
+
         /// <summary>
         /// 刷新页面范围下拉框
         /// </summary>
@@ -489,7 +689,5 @@ namespace PDF_Office.ViewModels.PageEdit
             }
         }
         #endregion
-
-
     }
 }

PDF Office/Views/PageEdit/PageEditContent.xaml.cs

@@ -83,7 +83,10 @@ namespace PDF_Office.Views.PageEdit
         {
             if((bool)e.NewValue)
             {
+                //当前页面没有发生变化时，刷新图片 这种情况下会拿两次图，需要留意
                 PulishEvent();
+                //当前页面发生变化时通过ScrollChanged事件来刷新图片
+                isFirstScrollChange = true;
             }
         }