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Force syntax highlighting - scrollviewers hidden

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ExpressionEditor

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Philipp asked on 28 Mar 2017, 05:43 AM

expressioneditor.png

Hello,

is it possible to force syntax highlighting, after setting expression in ExpressionEditor via property ExpressionText? (coming from binding)
On VisualStudio2013_Dark u can't read the expression without highlighting.

What i'm doing wrong? The scrollviewers bottom on editor categories and selected category items are hidden?
I'm using Telerik.Windows.Themes.VisualStudio2013 2017.1.313.40. The ExpressionEditor is in a GridRow with height of 300. It should be high enough?!

<telerik:RadExpressionEditor Grid.Row="5"

ExpressionText="{Binding RollenExpression.Expression, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

Item="{Binding Source={x:Static slapz:MainWindowViewModel.Instance}, Path=Users[0]}"

ExpressionChanged="ExpressionEditor_OnExpressionChanged"

x:Name="ExpressionEditor"/>

Thanks for any reply.

Regards
Philipp

4 Answers, 1 is accepted

answered on 30 Mar 2017, 03:16 PM

Hi Philipp,

I have managed to reproduce the issue with variable success. It seems to be a bug in the highlighting when there has been an invalid expression followed by a change in the invalid expression text or another invalid expression. There is no way at the moment to force the highlighting logic to be executed externally. Furthermore, I cannot seem to find a decent workaround in order to set a light foreground color in every case, especially when the value is coming from an external source - like a binding. I have logged a bug report about this issue and you can track its progress here. I have updated your points for reporting that.

One very questionable suggestion could be when the external expression value is changed, first to pass to the RadExpressionEditor a valid expression (might be even - (just a minus sign)) and after that to pass the new value.

As for the ScrollViewers - the border for the info EditorInfoPanel) has a MinHeight of 76 and when there is not enough space it stands on top of the 2 trees. They have a MinHeight of 146. For this theme with the current template, the RadExpressionEditor needs at least 420 available height for the ScrollViewers to fit entirely. You can modify the template of the RadExpressionEditor to change these values to better fit your project.

Regards,
Martin
Telerik by Progress

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answered on 04 Apr 2017, 02:40 PM

Hello Philipp,

We are glad that we solved at least that issue. As for the highlighting - it is executed only when the expression is changed and not when the expression text is changed, most probably that is why it fails even when the expression is valid and is executed again when you add a minus, as it treats the change as a change of the expression and not only its text. In any case, it is a bug and the highlighting should be executed properly.

Regards,
Martin
Telerik by Progress

Want to extend the target reach of your WPF applications, leveraging iOS, Android, and UWP? Try UI for Xamarin, a suite of polished and feature-rich components for the Xamarin framework, which allow you to write beautiful native mobile apps using a single shared C# codebase.