[Enhancement] Enum to Boolean Converter

[WebDucer]

Summary

It is often needed to activate / deactivate controls dependent on an Enum value.

Intended Use Case

<conv:EnumToBoolConverter x:Key="EnumConverter" />
...
<Button
  IsEnabled="{Binding WorkflowState, Converter={StaticResource EnumConverter}, ConverterParameter={x:Static enum:WorflowState.Staging}}"
  Text="Deploy" />

<conv:EnumToBoolConverter x:Key="EnumConverter" Invert="True" />
...
<Button
  IsVisible="{Binding WorkflowState, Converter={StaticResource EnumConverter}, ConverterParameter={x:Static enum:WorflowState.Finished}}"
  Text="Next" />

As configuration with multiple states

<conv:EnumsToBoolConverter x:Key="EnumConverter" Invert="True">
  <conv:EnumsToBoolConverter.Values>
    <enum:WorkflowState.Commit />
    <enum:WorkflowState.Build />
    <enum:WorkflowState.Staging />
    <enum:WorkflowState.QA />
  </conv:EnumsToBoolConverter.Values>
</conv:EnumsToBoolConverter>
...
<Button
  IsVisible="{Binding WorkflowState, Converter={StaticResource EnumConverter}}"
  Text="Finish" />

Who Will Do The Work?

• I am willing to take this on myself

[AndreiMisiukevich]

EnumToBoolConverter ?

it's definitely a good idea.

But how about considering to not stick to "Enum" at all?

StringToBoolConverter or "ValueToBoolConverter" (where value can be whatever: enum, string, int etc.)

[WebDucer]

@AndreiMisiukevich I like the idea. Will see, how to do this type safe (I like type safty 😏 ).

[AndreiMisiukevich]

Also, I guess we should avoid the "Invert" property. We can build two converters instead

• MatchValueConverter
• NotMatchValueConverter

But I am not sure about the name for such kind converter

CC @sthewissen @Char0394 @jfversluis

[WebDucer]

@AndreiMisiukevich How about this naming?

• ValueToBoolConverter
• InvertedValueToBoolConverter
• ValuesCollectionToBoolConverter
• InvertedValuesCollectionToBoolConverter

[pictos]

I think this a good candidate for Multi-Binding.

[WebDucer]

@pictos If the binding used only one time, yes, multibinding could match the needs. If you need the same condition(s) multiple times, multi binding is too verbose and not type safe.

Multi binding is more for use cases, where you are dependent on multiple (changable) values.

[jfversluis]

OK so where are we with this? @AndreiMisiukevich @pictos ? You have any more input?

I like the idea, could be useful!

[AndreiMisiukevich]

@WebDucer are you interested in contributing this converter?

[WebDucer]

@AndreiMisiukevich Yes. Wait only for a "GO" 😉

[WebDucer]

@AndreiMisiukevich We use such a converter internally since 3 years. So I have only to cleanup and make a PR (incl. 100% tests).

[pictos]

@WebDucer so go for it! I'll set this issue as in-progress, please us know if something happens and you can't work on it anymore.