拖拽-判空

PDF Office/Views/Dialog/ToolsDialogs/MergeDialog.xaml.cs

@@ -1,238 +1,243 @@
 using ImTools;
-using PDF_Master.CustomControl;
-using PDF_Master.Helper;
-using PDF_Master.Model.Dialog.ToolsDialogs;
-using PDF_Master.ViewModels.Dialog.ToolsDialogs;
-using System;
-using System.Collections.Generic;
+using PDF_Master.CustomControl;
+using PDF_Master.Helper;
+using PDF_Master.Model.Dialog.ToolsDialogs;
+using PDF_Master.ViewModels.Dialog.ToolsDialogs;
+using System;
+using System.Collections.Generic;
 using System.Data;
 using System.Diagnostics;
 using System.IO;
-using System.Linq;
-using System.Text;
-using System.Text.RegularExpressions;
-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 PDF_Master.Views.Dialog.ToolsDialogs
-{
-    /// <summary>
-    /// MergeDialog.xaml 的交互逻辑
-    /// </summary>
-    public partial class MergeDialog : UserControl
-    {
-        /// <summary>
-        /// 当前显示了线段的Item
-        /// </summary>
-        private ListViewItem listViewItem = null;
-        private bool IsFile = false;
-        public MergeDialog()
-        {
-            InitializeComponent();
-        }
-
-        private void Delete_Click(object sender, RoutedEventArgs e)
-        {
-            (DataContext as MergeDialogViewModel).DeleteItem((sender as Button).DataContext as MergeObject);
-        }
-
-        private void MergeView_PreviewMouseMove(object sender, MouseEventArgs e)
-        {
-            if (e.LeftButton == MouseButtonState.Pressed)
-            {
-                var pos = e.GetPosition(MergeView);
-                HitTestResult result = VisualTreeHelper.HitTest(MergeView, pos);
-                if (result == null)
-                {
-                    return;
-                }
-                //点击删除按钮
-                Button Button = CommonHelper.FindVisualParent<Button>(result.VisualHit);
-                if (Button != null)
-                {
-                    return;
-                }
-                //点击下拉框
-                WritableComboBox writableComboBox = CommonHelper.FindVisualParent<WritableComboBox>(result.VisualHit);
-                if (writableComboBox != null)
-                {
-                    return;
-                }
-                var treeViewItem = CommonHelper.FindVisualParent<ListViewItem>(result.VisualHit);
-                if (treeViewItem == null)
-                {
-                    return;
-                }
-                DataObject dataObj = new DataObject(treeViewItem);
-                DragDrop.DoDragDrop(MergeView, dataObj, DragDropEffects.Move);
-                return;
-            }
-
-        }
-
-        private void MergeView_Drop(object sender, DragEventArgs e)
-        {
-            //避免和Grid_Drop事件重复触发，V1.2.0测试完成后可以删除
-            //if (IsFile)
-            //{
-            //    DragDropHelper.Drop(this, e);
-            //    string[] file = (string[])e.Data.GetData(DataFormats.FileDrop);
-            //    (DataContext as MergeDialogViewModel).AddFiles(file);
-            //}
-            ListViewItem souredata = e.Data.GetData(typeof(ListViewItem)) as ListViewItem;
-            if (souredata == null)
-            {
-                return;
-            }
-            MergeObject soureNode = souredata.DataContext as MergeObject;
-            Point pos = e.GetPosition(MergeView);
-            HitTestResult result = VisualTreeHelper.HitTest(MergeView, pos);
-            if (result == null)
-            {
-                HiddenaAllLine();
-                return;
-            }
-            ListViewItem targetitem = CommonHelper.FindVisualParent<ListViewItem>(result.VisualHit);
-            if (targetitem == null)
-            {
-                HiddenaAllLine();
-                return;
-            }
-            MergeObject targetNode = targetitem.DataContext as MergeObject;
-            if (soureNode.Equals(targetNode))
-            {
-                HiddenaAllLine();
-                return;
-            }
-           (DataContext as MergeDialogViewModel).MoveMerge(targetNode, soureNode);
-            HiddenaAllLine();
-        }
-
-        private void MergeView_DragOver(object sender, DragEventArgs e)
-        {
-            if (IsFile)
-            {
-                DragDropHelper.DragOver(this, e);
-            }
-            ListViewItem sourceitem = e.Data.GetData(typeof(ListViewItem)) as ListViewItem;
-            if (sourceitem == null)
-            {
-                return;
-            }
-            Point pos = e.GetPosition(MergeView);
-            HitTestResult result = VisualTreeHelper.HitTest(MergeView, pos);
-            if (result != null)
-            {
-                ListViewItem treeviewitem = CommonHelper.FindVisualParent<ListViewItem>(result.VisualHit);
-                if (treeviewitem != null)
-                {
-                    if (listViewItem == null)
-                    {
-                        listViewItem = treeviewitem;
-                    }
-                    else if (!listViewItem.Equals(treeviewitem))
-                    {
-                        (listViewItem.DataContext as MergeObject).IsBackwards = false;
-                        (listViewItem.DataContext as MergeObject).IsForward = false;
-                        listViewItem = treeviewitem;
-                    }
-                    else
-                    {
-                        (listViewItem.DataContext as MergeObject).IsBackwards = false;
-                        (listViewItem.DataContext as MergeObject).IsForward = false;
-                    }
-                    if (listViewItem.Equals(sourceitem))
-                    {
-                        return;
-                    }
-
-                    //鼠标位于上半部分显示实线，下半部分显示虚线
-                    Point p = treeviewitem.TranslatePoint(new Point(0, 0), MergeView);
-                    if (pos.Y < p.Y + 16)
-                    {
-                        (treeviewitem.DataContext as MergeObject).IsBackwards = true;
-                    }
-                    else
-                    {
-                        (treeviewitem.DataContext as MergeObject).IsForward = true;
-                    }
-                }
-            }
-        }
-
-        private void MergeView_DragLeave(object sender, DragEventArgs e)
-        {
-            if (IsFile)
-            {
-                DragDropHelper.DragLeave();
-            }
-
-            HiddenaAllLine();
-        }
-
-        /// <summary>
-        /// 清理线条显示，以及相关缓存对象
-        /// </summary>
-        private void HiddenaAllLine()
-        {
-            if (listViewItem != null)
-            {
-                (listViewItem.DataContext as MergeObject).IsBackwards = false;
-                (listViewItem.DataContext as MergeObject).IsForward = false;
-                listViewItem = null;
-            }
-        }
-
-        private void TextBox_PreviewTextInput(object sender, TextCompositionEventArgs e)
-        {
-            Regex regex = new Regex("[^0-9.]+");
-            e.Handled = regex.IsMatch(e.Text);
-        }
-
-        private void TextBoxEx_LostFocus(object sender, RoutedEventArgs e)
-        {
-            try
-            {
-                double Tag = Double.Parse((sender as TextBox).Text);
-                if (Tag <= 0)
-                {
-                    (sender as TextBox).Text = "";
-                }
-            }
-            catch (Exception)
-            {
-                (sender as TextBox).Text = "";
-            }
-        }
-
-        private void TextBoxEx_PreviewKeyDown(object sender, KeyEventArgs e)
-        {
-            if (e.Key == Key.Enter)
-            {
-                BtnMerge.Focus();
-                e.Handled = true;
-            }
-        }
-
-        private void MergeView_DragEnter(object sender, DragEventArgs e)
-        {
-            IsFile = false;
-            var file = (System.Array)e.Data.GetData(DataFormats.FileDrop);
-            if (file == null)//为null 表示内部拖动 触发的
-            {
-                return;
-            }
-            foreach (string f in file)
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+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 PDF_Master.Views.Dialog.ToolsDialogs
+{
+    /// <summary>
+    /// MergeDialog.xaml 的交互逻辑
+    /// </summary>
+    public partial class MergeDialog : UserControl
+    {
+        /// <summary>
+        /// 当前显示了线段的Item
+        /// </summary>
+        private ListViewItem listViewItem = null;
+        private bool IsFile = false;
+        public MergeDialog()
+        {
+            InitializeComponent();
+        }
+
+        private void Delete_Click(object sender, RoutedEventArgs e)
+        {
+            (DataContext as MergeDialogViewModel).DeleteItem((sender as Button).DataContext as MergeObject);
+        }
+
+        private void MergeView_PreviewMouseMove(object sender, MouseEventArgs e)
+        {
+            if (e.LeftButton == MouseButtonState.Pressed)
+            {
+                var pos = e.GetPosition(MergeView);
+                HitTestResult result = VisualTreeHelper.HitTest(MergeView, pos);
+                if (result == null)
+                {
+                    return;
+                }
+                //点击删除按钮
+                Button Button = CommonHelper.FindVisualParent<Button>(result.VisualHit);
+                if (Button != null)
+                {
+                    return;
+                }
+                //点击下拉框
+                WritableComboBox writableComboBox = CommonHelper.FindVisualParent<WritableComboBox>(result.VisualHit);
+                if (writableComboBox != null)
+                {
+                    return;
+                }
+                var treeViewItem = CommonHelper.FindVisualParent<ListViewItem>(result.VisualHit);
+                if (treeViewItem == null)
+                {
+                    return;
+                }
+                DataObject dataObj = new DataObject(treeViewItem);
+                DragDrop.DoDragDrop(MergeView, dataObj, DragDropEffects.Move);
+                return;
+            }
+
+        }
+
+        private void MergeView_Drop(object sender, DragEventArgs e)
+        {
+            //避免和Grid_Drop事件重复触发，V1.2.0测试完成后可以删除
+            //if (IsFile)
+            //{
+            //    DragDropHelper.Drop(this, e);
+            //    string[] file = (string[])e.Data.GetData(DataFormats.FileDrop);
+            //    (DataContext as MergeDialogViewModel).AddFiles(file);
+            //}
+            ListViewItem souredata = e.Data.GetData(typeof(ListViewItem)) as ListViewItem;
+            if (souredata == null)
+            {
+                return;
+            }
+            MergeObject soureNode = souredata.DataContext as MergeObject;
+            //防止在外部点击拖入异常
+            if (soureNode == null) 
+            {
+                return; 
+            }
+            Point pos = e.GetPosition(MergeView);
+            HitTestResult result = VisualTreeHelper.HitTest(MergeView, pos);
+            if (result == null)
+            {
+                HiddenaAllLine();
+                return;
+            }
+            ListViewItem targetitem = CommonHelper.FindVisualParent<ListViewItem>(result.VisualHit);
+            if (targetitem == null)
+            {
+                HiddenaAllLine();
+                return;
+            }
+            MergeObject targetNode = targetitem.DataContext as MergeObject;
+            if (soureNode.Equals(targetNode))
             {
-                bool isFolder = Directory.Exists(f);
+                HiddenaAllLine();
+                return;
+            }
+           (DataContext as MergeDialogViewModel).MoveMerge(targetNode, soureNode);
+            HiddenaAllLine();
+        }
+
+        private void MergeView_DragOver(object sender, DragEventArgs e)
+        {
+            if (IsFile)
+            {
+                DragDropHelper.DragOver(this, e);
+            }
+            ListViewItem sourceitem = e.Data.GetData(typeof(ListViewItem)) as ListViewItem;
+            if (sourceitem == null)
+            {
+                return;
+            }
+            Point pos = e.GetPosition(MergeView);
+            HitTestResult result = VisualTreeHelper.HitTest(MergeView, pos);
+            if (result != null)
+            {
+                ListViewItem treeviewitem = CommonHelper.FindVisualParent<ListViewItem>(result.VisualHit);
+                if (treeviewitem != null)
+                {
+                    if (listViewItem == null)
+                    {
+                        listViewItem = treeviewitem;
+                    }
+                    else if (!listViewItem.Equals(treeviewitem))
+                    {
+                        (listViewItem.DataContext as MergeObject).IsBackwards = false;
+                        (listViewItem.DataContext as MergeObject).IsForward = false;
+                        listViewItem = treeviewitem;
+                    }
+                    else
+                    {
+                        (listViewItem.DataContext as MergeObject).IsBackwards = false;
+                        (listViewItem.DataContext as MergeObject).IsForward = false;
+                    }
+                    if (listViewItem.Equals(sourceitem))
+                    {
+                        return;
+                    }
+
+                    //鼠标位于上半部分显示实线，下半部分显示虚线
+                    Point p = treeviewitem.TranslatePoint(new Point(0, 0), MergeView);
+                    if (pos.Y < p.Y + 16)
+                    {
+                        (treeviewitem.DataContext as MergeObject).IsBackwards = true;
+                    }
+                    else
+                    {
+                        (treeviewitem.DataContext as MergeObject).IsForward = true;
+                    }
+                }
+            }
+        }
+
+        private void MergeView_DragLeave(object sender, DragEventArgs e)
+        {
+            if (IsFile)
+            {
+                DragDropHelper.DragLeave();
+            }
+
+            HiddenaAllLine();
+        }
+
+        /// <summary>
+        /// 清理线条显示，以及相关缓存对象
+        /// </summary>
+        private void HiddenaAllLine()
+        {
+            if (listViewItem != null)
+            {
+                (listViewItem.DataContext as MergeObject).IsBackwards = false;
+                (listViewItem.DataContext as MergeObject).IsForward = false;
+                listViewItem = null;
+            }
+        }
+
+        private void TextBox_PreviewTextInput(object sender, TextCompositionEventArgs e)
+        {
+            Regex regex = new Regex("[^0-9.]+");
+            e.Handled = regex.IsMatch(e.Text);
+        }
+
+        private void TextBoxEx_LostFocus(object sender, RoutedEventArgs e)
+        {
+            try
+            {
+                double Tag = Double.Parse((sender as TextBox).Text);
+                if (Tag <= 0)
+                {
+                    (sender as TextBox).Text = "";
+                }
+            }
+            catch (Exception)
+            {
+                (sender as TextBox).Text = "";
+            }
+        }
+
+        private void TextBoxEx_PreviewKeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.Key == Key.Enter)
+            {
+                BtnMerge.Focus();
+                e.Handled = true;
+            }
+        }
+
+        private void MergeView_DragEnter(object sender, DragEventArgs e)
+        {
+            IsFile = false;
+            var file = (System.Array)e.Data.GetData(DataFormats.FileDrop);
+            if (file == null)//为null 表示内部拖动 触发的
+            {
+                return;
+            }
+            foreach (string f in file)
+            {
+                bool isFolder = Directory.Exists(f);
                 if (isFolder)
                 {
                     foreach (string fi in Directory.GetFiles(f)) // 这里使用 "*.jpg" 作为搜索模式，可以根据需要修改
@@ -271,17 +276,17 @@ namespace PDF_Master.Views.Dialog.ToolsDialogs
                         DragDropHelper.DragEnter(this, e);
                         IsFile = true;
                     }
-                }
-            }
-        }
-
-        private void Grid_Drop(object sender, DragEventArgs e)
-        {
-            if (IsFile)
-            {
-                DragDropHelper.Drop(this, e);
-                string[] file = (string[])e.Data.GetData(DataFormats.FileDrop);
-                bool isFolder = Directory.Exists(file[0]);
+                }
+            }
+        }
+
+        private void Grid_Drop(object sender, DragEventArgs e)
+        {
+            if (IsFile)
+            {
+                DragDropHelper.Drop(this, e);
+                string[] file = (string[])e.Data.GetData(DataFormats.FileDrop);
+                bool isFolder = Directory.Exists(file[0]);
                 if (isFolder)
                 {
                     string file1 = file[0];
@@ -290,23 +295,23 @@ namespace PDF_Master.Views.Dialog.ToolsDialogs
                     (DataContext as MergeDialogViewModel).AddFiles(names.ToArray());
                 }
                 else {
-                    (DataContext as MergeDialogViewModel).AddFiles(file);
-                }
-                
-            }
-        }
-
-        private void Grid_DragEnter(object sender, DragEventArgs e)
-        {
-            IsFile = false;
-            var file = (System.Array)e.Data.GetData(DataFormats.FileDrop);
-            if (file == null)//为null 表示内部拖动 触发的
-            {
-                return;
-            }
-            foreach (string f in file)
-            {
-                bool isFolder = Directory.Exists(f);
+                    (DataContext as MergeDialogViewModel).AddFiles(file);
+                }
+                
+            }
+        }
+
+        private void Grid_DragEnter(object sender, DragEventArgs e)
+        {
+            IsFile = false;
+            var file = (System.Array)e.Data.GetData(DataFormats.FileDrop);
+            if (file == null)//为null 表示内部拖动 触发的
+            {
+                return;
+            }
+            foreach (string f in file)
+            {
+                bool isFolder = Directory.Exists(f);
                 if (isFolder)
                 {
                     foreach (string fi in Directory.GetFiles(f)) // 这里使用 "*.jpg" 作为搜索模式，可以根据需要修改
@@ -345,42 +350,42 @@ namespace PDF_Master.Views.Dialog.ToolsDialogs
                         DragDropHelper.DragEnter(this, e);
                         IsFile = true;
                     }
-                }
-                
-            }
-        }
-
-        private void Grid_DragOver(object sender, DragEventArgs e)
-        {
-            if (IsFile)
-            {
-                DragDropHelper.DragOver(this, e);
-            }
-        }
-
-        private void Grid_DragLeave(object sender, DragEventArgs e)
-        {
-            if (IsFile)
-            {
-                DragDropHelper.DragLeave();
-            }
-        }
-
-        private void UserControl_Loaded(object sender, RoutedEventArgs e)
-        {
-            NoFileText.Text = App.MainPageLoader.GetString("Merge_Hint");
-
-            TitleFileName.Text = App.MainPageLoader.GetString("Merge_TitleFileName");
-            TitlePageRange.Text = App.MainPageLoader.GetString("Merge_TitlePageRange");
-            TitleSize.Text = App.MainPageLoader.GetString("Merge_TitleSize");
-
-            TxbAddFileText.Text = App.MainPageLoader.GetString("Merge_AddFiles");
-            MenuAddComboBoxItem.Header = App.MainPageLoader.GetString("Merge_AddFiles");
-            MenuAddFolderComboBoxItem.Header = App.MainPageLoader.GetString("Merge_AddFolder");
-            MenuAddOpenFileComboBoxItem.Header = App.MainPageLoader.GetString("Merge_AddOpenFile");
-
-            BtnMerge.Content = App.MainPageLoader.GetString("Merge_Yes");
-            BtnCancel.Content = App.MainPageLoader.GetString("Merge_No");
+                }
+                
+            }
+        }
+
+        private void Grid_DragOver(object sender, DragEventArgs e)
+        {
+            if (IsFile)
+            {
+                DragDropHelper.DragOver(this, e);
+            }
+        }
+
+        private void Grid_DragLeave(object sender, DragEventArgs e)
+        {
+            if (IsFile)
+            {
+                DragDropHelper.DragLeave();
+            }
+        }
+
+        private void UserControl_Loaded(object sender, RoutedEventArgs e)
+        {
+            NoFileText.Text = App.MainPageLoader.GetString("Merge_Hint");
+
+            TitleFileName.Text = App.MainPageLoader.GetString("Merge_TitleFileName");
+            TitlePageRange.Text = App.MainPageLoader.GetString("Merge_TitlePageRange");
+            TitleSize.Text = App.MainPageLoader.GetString("Merge_TitleSize");
+
+            TxbAddFileText.Text = App.MainPageLoader.GetString("Merge_AddFiles");
+            MenuAddComboBoxItem.Header = App.MainPageLoader.GetString("Merge_AddFiles");
+            MenuAddFolderComboBoxItem.Header = App.MainPageLoader.GetString("Merge_AddFolder");
+            MenuAddOpenFileComboBoxItem.Header = App.MainPageLoader.GetString("Merge_AddOpenFile");
+
+            BtnMerge.Content = App.MainPageLoader.GetString("Merge_Yes");
+            BtnCancel.Content = App.MainPageLoader.GetString("Merge_No");
         }
 
         private void PageRangeWritableComboBox_LostFocus(object sender, RoutedEventArgs e)
@@ -436,5 +441,5 @@ namespace PDF_Master.Views.Dialog.ToolsDialogs
                 TraverseFiles(subFolder, names);
             }
         }
-    }
-}
+    }
+}