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c#textboxfocusuwp
Franck E
Franck E

Reputation: 729

UWP - Show textbox text highlight while textbox is out of focus

How do I prevent the textbox from hiding the selected text highlight when the textbox loses focus? The following line worked for WPF

textBox1.IsInactiveSelectionHighlightEnabled = true;

but what is the equivalent for UWP?

Upvotes: 3

Views: 1752

Answers (2)

b.pell
b.pell

Reputation: 4318

You can set the SelectionHighlightColorWhenNotFocused property either in Xaml or via code. You can set it to any color you want, I just used binding to make sure it's the same color as the SelectionHighlightColor to make it easy.

<TextBox Style="{StaticResource TextBoxLightStyle}" Name="TextBoxMain" 
     AcceptsReturn="True"
     SelectionHighlightColorWhenNotFocused="{Binding SelectionHighlightColor, ElementName=TextBoxMain, Mode=OneWay}">
</TextBox>

Upvotes: 1

Konstantin
Konstantin

Reputation: 884

As I know there is no equivalent in UWP for that. One of possible work-around solutions could be to use some image to keep selection highlighted. Here is sample code:

XAML:

<Border BorderThickness="2" BorderBrush="{ThemeResource TextBoxBorderThemeBrush}" Height="164" Width="684">
    <TextBox x:Name="textBox" TextWrapping="Wrap" Text="TextBox" BorderThickness="0,0,0,0"/>
</Border>

C#:

    private async void TextBox_SelectionChanged(object sender, RoutedEventArgs e)
    {
        // clear background            
        textBox.Background = new SolidColorBrush(Windows.UI.Color.FromArgb(255, 255, 255, 255)); ;

        // render image
        RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap();
        await renderTargetBitmap.RenderAsync(textBox);

        // set background
        textBox.Background = new ImageBrush()
        {
            ImageSource = renderTargetBitmap
        };
    }

In focus: enter image description here

Not in focus: enter image description here

p.s. I'm updating background on SelectionChanged event, but actually you can create image on that event and update only on LostFocus event. It should be more efficient.

Upvotes: 0

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