[regression/7.0.81] Grid can't use star and auto together in version 7.0.81

[tom-b-iodigital]

Discussed in #14519

Description

When you make a grid with a column(row)definition that is set to auto and another one that is set to *, and the grid is a child of a stacklayout the grid measurement calculations are wrong

Steps to Reproduce

1. create a new MAUI project following the default template
2. Replace the label with

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="auto"></ColumnDefinition>
        <ColumnDefinition Width="*"></ColumnDefinition>
    </Grid.ColumnDefinitions>

    <BoxView Color="Red" WidthRequest="20"></BoxView>
    
    <Label
        Grid.Column="1"
        Text="Welcome to .NET Multi-platform App UI"
        SemanticProperties.HeadingLevel="Level2"
        SemanticProperties.Description="Welcome to dot net Multi platform App U I"
        FontSize="18"
        HorizontalOptions="Center" />
</Grid>

3. run the app and notice the label is not being shown at all
4. change "auto" to 20 and run again, the label and boxview are shown correctly

These steps seems simple and clear enough, so I didn't provide a repro project yet. If needed I can upload one later

Link to public reproduction project repository

https://github.com/tom-b-iodigital/maui-gridbug

Version with bug

7.0.81

Last version that worked well

7.0.59

Affected platforms

iOS, Android, I was not able test on other platforms

Affected platform versions

All versions

Did you find any workaround?

Setting the column defined with auto to a fixed width fixes the problem, however this is not always possible in complex layouts

Relevant log output

No response

[espenrl]

I can confirm the same happens with ColumnDefinitions="*,Auto" on Windows. The Auto column is not visible. Also the entire Grid is cut off height wise.

[tom-b-iodigital]

After some more testing it really seems like the changes to grid calculations should be reverted, all the heights and widths are off.

On a somewhat related note: does anybody know how to rollback the workloads to the previous version of Maui 🙄

[tom-b-iodigital]

Update: this issue only occurs when the grid is a child of a stacklayout.

This seems to have been already known and tested

• [regression/7.0.0] Elements in ColumnDefinition with star width are not displayed when the Grid is in a StackLayout #13993
• Ensure that Grid is treating star rows/columns as Auto when unconstrained #13999

which makes it even stranger that this slipped through in an official release

[espenrl]

It is actually the initial calculations that are wrong. When resizing the window (not applicable for iPhone/Android) everything is recalculated roughly OK. I say rougly as my uniform margin Grid.Margin="15" is not uniform at all.

[espenrl]

On a somewhat related note: does anybody know how to rollback the workloads to the previous version of Maui 🙄

Visual Studio Installer has rollback to previous version.

[tom-b-iodigital]

On a somewhat related note: does anybody know how to rollback the workloads to the previous version of Maui 🙄

Visual Studio Installer has rollback to previous version.

yes, and it rolled back visual studio to 17.5.3 but left the workloads at 7.0.81

[espenrl]

On a somewhat related note: does anybody know how to rollback the workloads to the previous version of Maui 🙄

Visual Studio Installer has rollback to previous version.

yes, and it rolled back visual studio to 17.5.3 but left the workloads at 7.0.81

I got the workload back to 7.0.59 after downgrading both stable and preview VS. Although there seems to be other ways

#12998 (comment)

Hi @tom-b-iodigital. We have added the "s/needs-repro" label to this issue, which indicates that we require steps and sample code to reproduce the issue before we can take further action. Please try to create a minimal sample project/solution or code samples which reproduce the issue, ideally as a GitHub repo that we can clone. See more details about creating repros here: https://github.com/dotnet/maui/blob/main/.github/repro.md

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[drasticactions]

The repros projects are helpful so we can all have a shared understanding of the issue, as you see it, so if we try to fix it we have a baseline to check against. Even if it is an "It's so simple to take the template and replace it with X" type of issue, it makes it clear for anyone wanting to help to just check out your example and run it to see for themselves, and for you to verify that the issue is fixed against a clear example you've created.

[tom-b-iodigital]

Update with a repro project https://github.com/tom-b-iodigital/maui-gridbug