-
WPF开发经验-实现Win10虚拟触摸键盘
一 引入
项目有个需求，需要实现纯触控操作进行键盘输入。项目部署在Win10系统上，考虑有两种方案来实现。
- 通过调用Win10自带的触摸键盘来实现；
- 通过WPF实现一个触摸键盘来实现；
二 调用Win10自带的触摸键盘
简单附上一个调用Win10系统的TabTip.exe的操作类。
public class TabTipHelper { private const int WM_SYSCOMMAND = 274; private const uint SC_CLOSE = 61536; private const uint SC_RESTORE = 0xF120; private const uint SC_MAXIMIZE = 0xF030; private const uint SC_MINIMIZE = 0xF020; [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] private static extern bool PostMessage(IntPtr hWnd, int Msg, int wParam, int lParam); [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] private static extern bool PostMessage(IntPtr hWnd, int Msg, uint wParam, uint lParam); [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] private static extern bool PostMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam); [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] private static extern IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern int RegisterWindowMessage(string lpString); public static int ShowTaptip() { try { dynamic file = "C:\\Program Files\\Common Files\\microsoft shared\\ink\\TabTip.exe"; if (!System.IO.File.Exists(file)) return -1; Process.Start(file); return 1; } catch (Exception) { return 255; } } public static async Task ShowTaptipAsync() { await Task.Run(() => ShowTaptip()); } public static void CloseTaptip() { var touchhWnd = new IntPtr(0); touchhWnd = FindWindow("IPTip_Main_Window", null); if (touchhWnd == IntPtr.Zero) return; PostMessage(touchhWnd, WM_SYSCOMMAND, SC_CLOSE, 0); } }
三 通过WPF实现一个触摸键盘
下图为demo效果：
当TextBox获取焦点时，弹出键盘。当TextBox失去焦点时，隐藏键盘。
点击键盘的右上角的关闭键或Esc键隐藏键盘。
因项目不需要全键位，所有针对性地对键位进行了删减和排列。
3.1 SoftKeyboardControl控件
使用WPF的UserControl实现虚拟键盘，下附SoftKeyboardControl的后台代码。
/// <summary>
/// SoftKeyboardControl.xaml 的交互逻辑
/// </summary>
public partial class SoftKeyboardControl : UserControl
{
/// <summary>
/// Windows提供的一个模拟键盘API。
/// Keybd_event()函数能触发一个按键事件，生成一个 WM_KEYDOWN 或 WM_KEYUP 消息。
/// </summary>
/// <param name="bVk" >按键的虚拟键值</param>
/// <param name= "bScan" >扫描码，一般不用设置，用0代替就行</param>
/// <param name= "dwFlags" >选项标志：0：表示按下，2：表示松开</param>
/// <param name= "dwExtraInfo">一般设置为0</param>
[DllImport("User32.dll")]
public static extern void keybd_event(byte bVK, byte bScan, int dwFlags, int dwExtraInfo);
public SoftKeyboardControl()
{
InitializeComponent();
CreateKeys();
KeyCommand = new RoutedCommand();
CommandBinding cmdBinding = new CommandBinding(KeyCommand, KeyCommand_Excuted, KeyCommand_CanExcute);
CommandBindings.Add(cmdBinding);
}
#region 虚拟键值
/// <summary>
/// 键和虚拟键值的字典
/// </summary>
private Dictionary<string, byte> keys;
/// <summary>
/// 初始化虚拟键值的字典
/// </summary>
private void CreateKeys()
{
keys = new Dictionary<string, byte>()
{
#region 数字键盘
{ "0",0x60},
{ "1",0x61},
{ "2",0x62},
{ "3",0x63},
{ "4",0x64},
{ "5",0x65},
{ "6",0x66},
{ "7",0x67},
{ "8",0x68},
{ "9",0x69},
{ "-",0x6d},
{ ".",0x6E},
#endregion
#region Q字母行
{ "q", 0x51},
{ "w", 0x57},
{ "e", 0x45},
{ "r", 0x52},
{ "t", 0x54},
{ "y", 0x59},
{ "u", 0x55},
{ "i", 0x49},
{ "o", 0x4f},
{ "p", 0x50},
{ "Q", 0x51},
{ "W", 0x57},
{ "E", 0x45},
{ "R", 0x52},
{ "T", 0x54},
{ "Y", 0x59},
{ "U", 0x55},
{ "I", 0x49},
{ "O", 0x4f},
{ "P", 0x50},
#endregion
#region A字母行
{ "a", 0x41},
{ "s", 0x53},
{ "d", 0x44},
{ "f", 0x46},
{ "g", 0x47},
{ "h", 0x48},
{ "j", 0x4A},
{ "k", 0x4B},
{ "l", 0x4C},
{ "A", 0x41},
{ "S", 0x53},
{ "D", 0x44},
{ "F", 0x46},
{ "G", 0x47},
{ "H", 0x48},
{ "J", 0x4A},
{ "K", 0x4B},
{ "L", 0x4C},
#endregion
#region Z字母行
{ "z", 0x5A},
{ "x", 0x58},
{ "c", 0x43},
{ "v", 0x56},
{ "b", 0x42},
{ "n", 0x4E},
{ "m", 0x4D},
{ "Z", 0x5A},
{ "X", 0x58},
{ "C", 0x43},
{ "V", 0x56},
{ "B", 0x42},
{ "N", 0x4E},
{ "M", 0x4D},
#endregion
#region other
{"BackSpace",0x08 },
{"Tab",0x09 },
{"Enter",0x0d },
{"Shift",0x10 },
{"Ctrl",0x11 },
{"CapsLock",0x14 },
{"Space",0x20 },
#endregion
};
}
#endregion
#region DependencyProperty
public static readonly DependencyProperty CapsProperty = DependencyProperty.Register(
"Caps", typeof(bool), typeof(SoftKeyboardControl), new PropertyMetadata(default(bool)));
public bool Caps
{
get { return (bool)GetValue(CapsProperty); }
set { SetValue(CapsProperty, value); }
}
public static readonly DependencyProperty CtrlProperty = DependencyProperty.Register(
"Ctrl", typeof(bool), typeof(SoftKeyboardControl), new PropertyMetadata(default(bool)));
public bool Ctrl
{
get { return (bool)GetValue(CtrlProperty); }
set { SetValue(CtrlProperty, value); }
}
public static readonly DependencyProperty ShiftProperty = DependencyProperty.Register(
"Shift", typeof(bool), typeof(SoftKeyboardControl), new PropertyMetadata(default(bool)));
public bool Shift
{
get { return (bool)GetValue(ShiftProperty); }
set { SetValue(ShiftProperty, value); }
}
#endregion
#region Command
public ICommand KeyCommand { get; set; }
private void KeyCommand_CanExcute(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = true;
}
private void KeyCommand_Excuted(object sender, ExecutedRoutedEventArgs e)
{
if (e.Parameter != null)
{
var code = e.Parameter.ToString();
if (keys.ContainsKey(code))
{
byte b = keys[code];
try
{
keybd_event(b, 0, 0, 0);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
}
public ICommand CloseCommand { get; set; }
#endregion
protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
{
base.OnPropertyChanged(e);
if (e.Property == CapsProperty)
{
keybd_event(0x14, 0, 0, 0);//按下
keybd_event(0x14, 0, 2, 0); //抬起
}
else if (e.Property == ShiftProperty)
{
keybd_event(0x10, 0, 0, 0);
keybd_event(0x10, 0, 2, 0);
}
else if (e.Property == CtrlProperty)
{
keybd_event(0x11, 0, 0, 0);
keybd_event(0x11, 0, 2, 0);
}
}
}
/// <summary>
/// 大小写转换
/// </summary>
public class UpperConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (parameter == null)
{
return "";
}
if (value == null)
{
return parameter.ToString();
}
if ((bool)value)
{
return parameter.ToString().ToUpper();
}
else
{
return parameter.ToString().ToLower();
}
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
下附SoftKeyboardControl的前台代码。
注：其中按钮的样式是自己的控件库中实现的，未贴出。
<UserControl x:Class="UI.View.SoftKeyboardControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:UI.View" mc:Ignorable="d" Background="#E6E6E6"> <UserControl.Resources> <local:UpperConverter x:Key="UpperConverter"/> </UserControl.Resources> <StackPanel Margin="6 0 6 6"> <StackPanel Height="40" Orientation="Horizontal" > <!--关闭按钮--> </StackPanel> <StackPanel Orientation="Horizontal" Margin="0 6 0 0" > <StackPanel> <WrapPanel> <Button Content="Esc" Width="85" Height="Auto" Padding="0" Command="{Binding CloseCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" /> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=q}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=w}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=e}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=r}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=t}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=y}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=u}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=i}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=o}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=p}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> </WrapPanel> <WrapPanel> <ToggleButton Width="100" Content="Caps" IsChecked="{Binding Caps,Mode=TwoWay,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=a}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=s}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=d}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=f}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=g}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=h}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=j}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=k}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=l}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> </WrapPanel> <WrapPanel> <ToggleButton Width="115" Padding="-18 0 0 0 " Content="Shift" IsChecked="{Binding Shift,Mode=TwoWay,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=z}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=x}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=c}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=v}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=b}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=n}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="{Binding Path=Caps,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}, Converter={StaticResource UpperConverter},ConverterParameter=m}" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Width="125" Content="Enter" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> </WrapPanel> <WrapPanel> <ToggleButton Width="115" Padding="-28 0 0 0 " Content="Ctrl" IsChecked="{Binding Ctrl,Mode=TwoWay,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}"/> <Button Content="Space" Width="185" Margin="50 0 0 0" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="BackSpace" Width="170" Margin="50 0 0 0" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> </WrapPanel> </StackPanel> <Grid Width="auto" Height="auto"> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition/> </Grid.ColumnDefinitions> <Button Content="7" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="8" Grid.Column="1" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="9" Grid.Column="2" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="4" Grid.Row="1" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="5" Grid.Row="1" Grid.Column="1" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="6" Grid.Row="1" Grid.Column="2" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="1" Grid.Row="2" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="2" Grid.Row="2" Grid.Column="1" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="3" Grid.Row="2" Grid.Column="2" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="-" Grid.Row="3" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="0" Grid.Row="3" Grid.Column="1" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="." Grid.Row="3" Grid.Column="2" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> <Button Content="Esc" Grid.Row="0" Grid.Column="3" Grid.RowSpan="2" Margin="0,0,0,5" Width="56" Height="Auto" Padding="0" Command="{Binding CloseCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" /> <Button Grid.Row="2" Grid.Column="3" Grid.RowSpan="2" Height="auto" Width="56" Margin="0 0 0 4" Padding="0" Content="Enter" Command="{Binding KeyCommand,RelativeSource={RelativeSource AncestorType={x:Type local:SoftKeyboardControl}}}" CommandParameter="{Binding Path=Content,RelativeSource={RelativeSource Self}}"/> </Grid> </StackPanel> </StackPanel> </UserControl>
3.2 Demo界面的代码
下附Demo界面后台代码。
/// <summary> /// TestWindow.xaml 的交互逻辑 /// </summary> public partial class TestWindow : Window { public TestWindow() { InitializeComponent(); softKeyboard.CloseCommand = new RoutedCommand(); CommandBinding cmdBinding = new CommandBinding(softKeyboard.CloseCommand, CloseCommand_Excuted, CloseCommand_CanExcute); CommandBindings.Add(cmdBinding); } private void CloseCommand_CanExcute(object sender, CanExecuteRoutedEventArgs e) { e.CanExecute = popup.IsOpen; } private void CloseCommand_Excuted(object sender, ExecutedRoutedEventArgs e) { popup.IsOpen = false; textBox.Focus(); } private void TextBox_GotFocus(object sender, RoutedEventArgs e) { popup.IsOpen = true; } private void TextBox_LostFocus(object sender, RoutedEventArgs e) { popup.IsOpen = false; } }
下附Demo界面的前台代码。
<Window x:Class="UI.View.TestWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" xmlns:view="clr-namespace:UI.View" Title="TestWindow" Height="800" Width="1400"> <Grid x:Name="grid"> <TextBox Margin="415,233,447,0" FontSize="30" Height="62" VerticalContentAlignment="Center" VerticalAlignment="Top" GotFocus="TextBox_GotFocus" LostFocus="TextBox_LostFocus" /> <TextBox x:Name="textBox" Margin="470,343,503,364" /> <Popup x:Name="popup" StaysOpen="True" AllowsTransparency="True" PopupAnimation="Fade" PlacementTarget="{Binding ElementName = grid}" Placement="Bottom" HorizontalOffset="250" VerticalOffset="-280"> <view:SoftKeyboardControl x:Name="softKeyboard"/> </Popup> </Grid> </Window>
出处：https://www.cnblogs.com/wwwen/p/16017480.html
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