UWP/FooEditEngine.UWP/AutoCompleteBox.cs

   1 using System;
   2 using Windows.System;
   3 using Windows.UI.Xaml.Controls;
   4 using Windows.UI.Xaml.Controls.Primitives;
   5 using Windows.UI.Xaml.Input;
   6
   7 namespace FooEditEngine.UWP
   8 {
   9     public class AutoCompleteBox : AutoCompleteBoxBase
  10     {
  11         private string inputedWord;
  12         private ListBox listBox1 = new ListBox();
  13         private Popup popup = new Popup();
  14         private Document doc;
  15
  16         public const int CompleteListBoxHeight = 200;
  17
  18         public AutoCompleteBox(Document doc) : base(doc)
  19         {
  20             //リストボックスを追加する
  21             this.popup.Child = this.listBox1;
  22             this.listBox1.DoubleTapped += ListBox1_DoubleTapped;
  23             this.listBox1.KeyDown += listBox1_KeyDown;
  24             this.listBox1.Height = CompleteListBoxHeight;
  25             this.doc = doc;
  26         }
  27
  28         /// <summary>
  29         /// オートコンプリートの対象となる単語のリスト
  30         /// </summary>
  31         public override CompleteCollection<ICompleteItem> Items
  32         {
  33             get
  34             {
  35                 return (CompleteCollection<ICompleteItem>)this.listBox1.ItemsSource;
  36             }
  37             set
  38             {
  39                 this.listBox1.ItemsSource = value;
  40                 this.listBox1.DisplayMemberPath = CompleteCollection<ICompleteItem>.ShowMember;
  41             }
  42         }
  43
  44         protected override bool IsCloseCompleteBox
  45         {
  46             get
  47             {
  48                 return !this.popup.IsOpen;
  49             }
  50         }
  51
  52         protected override void RequestShowCompleteBox(ShowingCompleteBoxEventArgs ev)
  53         {
  54             this.inputedWord = ev.inputedWord;
  55             this.listBox1.SelectedIndex = ev.foundIndex;
  56             this.listBox1.ScrollIntoView(this.listBox1.SelectedItem);
  57             this.popup.IsOpen = true;
  58             Canvas.SetLeft(this.popup, ev.CaretPostion.X);
  59             Canvas.SetTop(this.popup, ev.CaretPostion.Y);
  60         }
  61
  62         protected override void RequestCloseCompleteBox()
  63         {
  64             this.popup.IsOpen = false;
  65         }
  66
  67         public bool ProcessKeyDown(FooTextBox textbox, KeyRoutedEventArgs e,bool isCtrl,bool isShift)
  68         {
  69             if (this.popup.IsOpen == false)
  70             {
  71                 if (e.Key == VirtualKey.Space && isCtrl)
  72                 {
  73                     this.OpenCompleteBox(string.Empty);
  74                     e.Handled = true;
  75
  76                     return true;
  77                 }
  78                 return false;
  79             }
  80
  81             switch (e.Key)
  82             {
  83                 case VirtualKey.Escape:
  84                     this.RequestCloseCompleteBox();
  85                     textbox.Focus(Windows.UI.Xaml.FocusState.Programmatic);
  86                     e.Handled = true;
  87                     return true;
  88                 case VirtualKey.Down:
  89                     if (this.listBox1.SelectedIndex + 1 >= this.listBox1.Items.Count)
  90                         this.listBox1.SelectedIndex = this.listBox1.Items.Count - 1;
  91                     else
  92                         this.listBox1.SelectedIndex++;
  93                     this.listBox1.ScrollIntoView(this.listBox1.SelectedItem);
  94                     e.Handled = true;
  95                     return true;
  96                 case VirtualKey.Up:
  97                     if (this.listBox1.SelectedIndex - 1 < 0)
  98                         this.listBox1.SelectedIndex = 0;
  99                     else
 100                         this.listBox1.SelectedIndex--;
 101                     this.listBox1.ScrollIntoView(this.listBox1.SelectedItem);
 102                     e.Handled = true;
 103                     return true;
 104                 case VirtualKey.Tab:
 105                 case VirtualKey.Enter:
 106                     this.RequestCloseCompleteBox();
 107                     CompleteWord selWord = (CompleteWord)this.listBox1.SelectedItem;
 108                     this.SelectItem(this, new SelectItemEventArgs(selWord.word, this.inputedWord, this.Document));
 109                     e.Handled = true;
 110                     return true;
 111             }
 112
 113             return false;
 114         }
 115
 116         private void ListBox1_DoubleTapped(object sender, DoubleTappedRoutedEventArgs e)
 117         {
 118             this.popup.IsOpen = false;
 119             CompleteWord selWord = (CompleteWord)this.listBox1.SelectedItem;
 120             this.SelectItem(this, new SelectItemEventArgs(selWord.word, this.inputedWord, this.Document));
 121         }
 122
 123         void listBox1_KeyDown(object sender, KeyRoutedEventArgs e)
 124         {
 125             if (e.Key == VirtualKey.Enter)
 126             {
 127                 this.popup.IsOpen = false;
 128                 CompleteWord selWord = (CompleteWord)this.listBox1.SelectedItem;
 129                 this.SelectItem(this, new SelectItemEventArgs(selWord.word, this.inputedWord, this.Document));
 130                 e.Handled = true;
 131             }
 132         }
 133     }
 134 }