dxe:TextEdit 在单击控件后失去焦点并且无法键入

Question

我在 WPF 应用程序的 UserControl 中有一个 <dxe:TextEdit/> 控件。 TextEdit 控件有一个包含 TextBlock 的模板。

  <dxe:TextEdit Name="WaterMarkTextEdit"
                              NullText="Type something..."
                              EditValue=""
                              Style="{StaticResource TextEditStyle}"
                              MaxWidth="230" 
                              Margin="0,30"/>

   <Style x:Key="CustomTextBoxEditStyle" TargetType="TextBox"  
           BasedOn="{StaticResource {themes:TextEditThemeKey ResourceKey=TextStyle}}">
        <Style.Triggers>
            <DataTrigger Binding="{Binding IsKeyboardFocusWithin, RelativeSource={RelativeSource Self}}"  
                         Value="False">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="TextBox">
                            <TextBlock Text="{TemplateBinding Text}"  
                                       Style="{StaticResource TextTrimmedStyle}"
                                       Margin="3,0,0,0"  
                                       VerticalAlignment="Center" 
                                       IsHitTestVisible="False"/>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </DataTrigger>
        </Style.Triggers>
    </Style>

<Style x:Key="TextEditStyle" TargetType="dxe:TextEdit">
    <Style.Resources>
        <Style TargetType="ToolTip" BasedOn="{StaticResource ToolTipStyle}"/>
    </Style.Resources>
    <Setter Property="FontStyle" Value="Italic"/>
    <Setter Property="FontWeight" Value="Normal"/>
    <Setter Property="FontSize" Value="{StaticResource GlobalNormalTextFontSize}"/>
    <Setter Property="FontFamily" Value="{StaticResource GlobalFontFamily}"/>
    <Setter Property="Foreground" Value="{StaticResource PrimaryBrush}" />
    <Setter Property="BorderBrush" Value="{StaticResource PrimaryBrush}"/>
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="ShowError" Value="False"/>
    <Setter Property="UseLayoutRounding" Value="True"/>
    <Setter Property="EditTemplate">
        <Setter.Value>
            <ControlTemplate>
                <TextBox x:Name="PART_Editor"  
               TextWrapping="NoWrap"  
               helpers:EditorMarginHelper.Margin="3,3,3,3,0,3,3,3"
               Style="{StaticResource CustomTextBoxEditStyle}"/>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

所以当 TextEdit 不是 clicked/focused 时，它出于某种目的处于只读模式。当聚焦时，用户可以输入 TextEdit。因此，我在 TextEdit 样式的数据触发器中使用 IsKeyboardFocusWithin 布尔值属性。如果属性值为 false，则 TextEdit 处于只读模式，否则处于编辑模式。但即使我专注于控件，它也不会进入编辑模式。

Answer 1

键盘焦点以某种方式被任何其他控件覆盖并且焦点从 TextEdit 移开。为了有效地集中注意力，我创建了一个额外的事件，以便它始终集中在 TextEdit 上。

在 usercontrol.xaml 文件中：

 <dxe:TextEdit Name="WaterMarkTextEdit" 
                              NullText="Type something..."
                              EditValue="Text edit box with water mark and drop shadow"
                              Style="{StaticResource TextEditWithWaterMarkAndDropShadowStyle}"
                              IsKeyboardFocusWithinChanged="WaterMarkTextEdit_OnIsKeyboardFocusWithinChanged"
                              MaxWidth="230" 
                              Height="60"
                              Margin="0,30"/>

在usercontrol.xaml.cs 文件中：

//-----------------------------------------------------------------------------------------
            /// <summary>
            /// The event handler to force the keyboard focus; because somehow focus is moving away
            /// and keyboard is losing it's focus for the current control
            /// </summary>
            private void WaterMarkTextEdit_OnIsKeyboardFocusWithinChanged(object sender, DependencyPropertyChangedEventArgs e)
            {
                if ((bool)e.NewValue)
                {
                    Dispatcher.BeginInvoke(DispatcherPriority.Input,
                        new Action(delegate () {
                            Keyboard.Focus(WaterMarkTextEdit); // Set Keyboard Focus
                        }));
                }
            }

dxe:TextEdit 在单击控件后失去焦点并且无法键入

dxe:TextEdit is losing focus after clicking on the control and is not possible to type

c#

.net

wpf

devexpress