HexInput

基本思路

PreviewTextInput

OnTextChange

OnLostFocus

PreviewKeyDown

HexInput.xaml

1 <UserControl x:Class="MeterGui_BlendView.HexInput"

2              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

3              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

4              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 

5              xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 

6              mc:Ignorable="d">

7     <TextBox x:Name="TB" PreviewTextInput="TB_PreviewTextInput" TextChanged="TB_TextChanged" PreviewKeyDown="TB_PreviewKeyDown" LostFocus="TB_LostFocus" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>

8 </UserControl>

HexInput.xaml.cs

  1 using System;

  2 using System.Collections.Generic;

  3 using System.Linq;

  4 using System.Text;

  5 using System.Windows;

  6 using System.Windows.Controls;

  7 using System.Windows.Data;

  8 using System.Windows.Documents;

  9 using System.Windows.Input;

 10 using System.Windows.Media;

 11 using System.Windows.Media.Imaging;

 12 using System.Windows.Navigation;

 13 using System.Windows.Shapes;

 14 

 15 namespace MeterGui_BlendView

 16 {

 17     /// <summary>

 18     /// HexInput.xaml 的交互逻辑

 19     /// </summary>

 20     public partial class HexInput : UserControl

 21     {

 22         public HexInput()

 23         {

 24             InitializeComponent();

 25             Binding binding = new Binding();

 26             binding.Source = this;

 27             binding.Path = new PropertyPath("HexText");

 28             binding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;

 29             binding.Mode = BindingMode.TwoWay;

 30             TB.SetBinding(TextBox.TextProperty, binding);

 31         }

 32         #region DependencyProperty        

 33         public static readonly DependencyProperty HexTextProperty = DependencyProperty.Register(

 34         "HexText",//制定属性的名称

 35         typeof(string), //制定属性的类型

 36         typeof(HexInput),//

 37         new FrameworkPropertyMetadata(""));//设定默认值

 38         public string HexText

 39         {

 40             get { return (string)GetValue(HexTextProperty); }

 41             set { SetValue(HexTextProperty, value); }

 42         }

 43 

 44         public static readonly DependencyProperty AutoNumberProperty = DependencyProperty.Register(

 45         "AutoNumber", typeof(long), typeof(HexInput),new FrameworkPropertyMetadata((long)2));

 46         public long AutoNumber

 47         {

 48             get { return (long)GetValue(AutoNumberProperty); }

 49             set { SetValue(AutoNumberProperty, value); }

 50         } 

 51         #endregion

 52 

 53         //private void TB_PreviewTextInput(object sender, TextCompositionEventArgs e)

 54         //{

 55         //    if(!("0123456789ABCDEF".Contains(e.Text.ToUpper())))

 56         //        e.Handled=true;

 57         //}

 58 

 59         //private void TB_TextChanged(object sender, TextChangedEventArgs e)

 60         //{

 61         //    if (!(sender as TextBox).IsFocused)

 62         //    {

 63         //        string s = (sender as TextBox).Text;

 64         //        FormatHex(ref s);

 65         //        (sender as TextBox).Text = s;

 66         //    }

 67         //}

 68 

 69         private void TB_LostFocus(object sender, RoutedEventArgs e)

 70         {

 71             string s = TB.Text;

 72             FormatHex(ref s);

 73             TB.Text = s;

 74         }

 75 

 76         private void TB_PreviewKeyDown(object sender, KeyEventArgs e)

 77         {

 78             if (false

 79                 || e.Key == Key.Space

 80                 )

 81                 e.Handled = true;

 82         }

 83 

 84         private void TB_PreviewTextInput(object sender, TextCompositionEventArgs e)

 85         {

 86             int p = (sender as TextBox).SelectionStart;

 87             int pl = (sender as TextBox).SelectionLength;

 88             string s = (sender as TextBox).Text;

 89             if ("0123456789ABCDEF".Contains(e.Text.ToUpper()))

 90             {

 91                 //s=s.Remove(p+1,pl-1)

 92                 if (p == s.Length)

 93                 {

 94                     s = p == 0 ? s + e.Text + "0" : s + " " + e.Text + "0";

 95                     p = p == 0 ? p : p + 1;

 96                 }

 97                 else

 98                 {

 99                     //如果空格结尾会有索引越界情况

100                     if (s.Substring((sender as TextBox).SelectionStart, 1) == " ")

101                     {

102                         p = p + 1;

103                     }

104                     s = s.Remove(p, 1);

105                     s = s.Insert(p, e.Text);

106                 }

107             }

108             (sender as TextBox).Text = s;

109             (sender as TextBox).SelectionStart = p + 1;

110             e.Handled = true;

111         }

112 

113         private void TB_TextChanged(object sender, TextChangedEventArgs e)

114         {

115             int p = (sender as TextBox).SelectionStart;

116             string s = (sender as TextBox).Text;

117             FormatHex(ref s);

118             (sender as TextBox).Text = s;

119             (sender as TextBox).SelectionStart = p;

120             //HexText = TB.Text.Replace(" ", "");

121         }

122 

123         private void FormatHex(ref string s,bool b=true)

124         {

125             s = s.Replace(" ", "");

126             //s = ((s.Length % AutoNumber) == 0) ? s : (s + "0");

127             if (s.Length >= 128)

128                 s = s.Substring(0, 128);

129             if(b)

130             {

131                 for (int i = ((int)AutoNumber - s.Length % (int)AutoNumber) % (int)AutoNumber; i > 0; i--) 

132                 {

133                     s = s + "0";

134                 }

135             }

136             int l = s.Length;

137             int n = (l-2) / 2;

138             for (int i = n; i > 0; i--)

139             {

140                 s = s.Insert(2 * i, " ");

141             }

142             s = s.ToUpper();

143         }

144 

145 

146     }

147 }

<vi:HexInput 

AutoNumber="8"  

HexText="{Binding Model.P_option, Mode=TwoWay, 

Converter={StaticResource String2HexStringConverter2}}" />