[BUG] MaskedBehavior mask is not applied right away when entry is right aligned

[lancecontreras]

Is there an existing issue for this?

• I have searched the existing issues

Did you read the "Reporting a bug" section on Contributing file?

• I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

When using a MaskedBehavior on an entry while the entry's HorizontalTextAlignment is to the end (right aligned), the masking is not applied upon reaching the position of the mask.

For example:

Mask = "0000.00"
Entered text = "123"
Masked text = "123"

Expected Behavior

Since the HorizontalTextAlignment is set to the end (right), the expected behavior is that the input to the entry starts from the right. Therefore, when the mask position is hit, it should apply the mask.

Mask="0000.00"
Entered text = "123"
Expected masked text = "1.23"

Steps To Reproduce

1. Create a new MAUI project and add the CommunityToolkit
2. Add an entry to the page
3. Add Masked behavio
4. Set mask to "0000.00"
5. Set UnmaskedCharacter to "0"
6. Run the app
7. Notice that the masking will not apply upon hitting the position of the dot.

     <Entry HorizontalTextAlignment="End" HorizontalOptions="End">
       <Entry.Behaviors>
         <toolkit:MaskedBehavior Mask="0000.00" UnmaskedCharacter="0" />
       </Entry.Behaviors>
     </Entry>

Link to public reproduction project repository

https://github.com/lancecontreras/MaskedEntryExample

Environment

- .NET MAUI CommunityToolkit: 11
- OS: Android
- .NET MAUI: 9

Anything else?

This will probably be the same issue on Windows or ios but I haven't tested those.

[bijington]

The HorizontalTextAlignment property just determines where the text is aligned within the Entry field it doesn't determine the flow of the text. I don't think what you are asking for is possible right now but I don't think the current behaviour is wrong. I suspect you would need some form of additional property on the behaviour to determine this flow - I can't think of how to suggest it right now though