AvaloniaUI/Avalonia

A multi-platform .NET UI framework.

Sam6966

@Sam6966

Nick, I will upvote, and look forward to the next installment. Cheers All

Xing Hong

@Xing1985

Nick Polyak

@npolyak

@Xing1985 I think you should NOT set the corresponding width or height and perhaps set the corresponding HorizontalAlignment or VerticalAlignment to Stretch

Xing Hong

@Xing1985

let me check

Nick Polyak

@npolyak

@Xing1985 if you publish your code I'll be able to help more

@Sam6966 Thanks Sam - I plan to write a new installment within a week or 2

Xing Hong

@Xing1985

Nick Polyak

@npolyak

@Xing1985 try setting the first button's VerticalAlignment to Stretch. In the meanwhile let me try to reproduce the problem on my machine

Xing Hong

@Xing1985

yeah, good working now

thx!

Nick Polyak

@npolyak

cool, pleasure - if you like my article, please, upvote :)

thanks

Xing Hong

@Xing1985

and I have an issue when using TabControl on mac os. If I set the SelectedIndex of TabControl in TabControl_SelectionChanged event then it goes to the selected tab and then if I click another TabItem then always go to the previouse TabItem. The Windows version is good working.

this is my code part

Nick Polyak

@npolyak

It is almost midnight here - so I'll have to quit soon, but you should not reset SelectedIndex in the SelectionChanged handler - it can lead to a circular code

Xing Hong

@Xing1985

how do i force select another tab?

Sam6966

@Sam6966

Hi Nick, I'm guessing when you upvote, you rate with the stars?

Nick Polyak

@npolyak

Best of all would be to bind the SelectedIndex property to something on a view model

you can create TheSelectedIndex StyleProperty and

try to change it to whatever you want in your control

@Sam6966 yes, you select the number of the stars

Xing Hong

@Xing1985

ok, thank you for your help

Nick Polyak

@npolyak

I think you might need to register for the codeproject site

pleasure @Xing1985

Xing Hong

@Xing1985

I just did upvote your article. :wink:

Nick Polyak

@npolyak

Then you bind your TabControl.SelectedIndex property to the TheSelectedIndex on your control - it has to be a two way binding

thanks

Sam6966

@Sam6966

Yes already registered and rated 5 stars. First time rating an article. Enjoy your evening.

Nick Polyak

@npolyak

if you want send me the full code for your control or tell me where to download it from and I'll take a look at it tomorrow

Thanks @Xing1985 and @Sam6966

good night!

Xing Hong

@Xing1985

Have a good Dream!

bitbonk

@bitbonk

The XamlControlsGallery on master (.NET Core) has may empty entries, is this expected? (see above screenshot)

Timothy

@timothyparez

Hi All, I just published an AvaloniaUI tutorial on the codeproject - https://www.codeproject.com/Articles/5308645/Multiplatform-UI-Coding-with-AvaloniaUI-in-Easy-Sa. I'd appreciate some feedback. Thanks

will check it out!

Dan Walmsley

@danwalmsley

@bitbonk yes... we need people to help finish it :)

1 reply

Timothy

@timothyparez

I have a UserControl with a StyledProperty<ObservableCollection<SomeType>>
I call AffectsRender<MyUserControl>(SpatialsProperty); which causes the control to render if I change the property but what I actually want its to
render whenever items are added or removed. Do I just use ObservableCollection.CollectionChanged or is there a better way?

Andreas Schauerte

@schauerte

Is there any example for using TreeView (and providing children selector in XAML)?

Andreas Schauerte

@schauerte

Is there any example for using TreeView (and providing children selector in XAML)?

Stupid question - right here: https://github.com/AvaloniaUI/Avalonia/blob/master/samples/ControlCatalog/Pages/TreeViewPage.xaml

Timothy

@timothyparez

If it had been a stupid question there wouldn't be a sample to answer your question :)

boonkerz

@boonkerz

how can i add an close icon to the tabheader?

<TabControl.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="{Binding Header}" />
                        <Button  Command="{Binding CloseTab}">
                            <avalonia:MaterialIcon Kind="Close"></avalonia:MaterialIcon>
                        </Button>
                    </StackPanel>
                </DataTemplate>
            </TabControl.ItemTemplate>

the command is not executed?

Daniel Lukach

@dlukach_gitlab

hey all, trying to make a datagrid to display some data. Having some issues displaying the datagrid, I bound the columns to seperate observable collections. Any pointers?

<DataGrid IsVisible="{Binding IsTableChecked}" Items="{Binding}" HeadersVisibility="All" AutoGenerateColumns="True">
            <DataGrid.Columns>

                <DataGridTextColumn Header="{Binding LoadColumnString}" Binding="{Binding BufferLoad }" IsVisible="True" Width="*"/>
                <DataGridTextColumn Header="{Binding DistanceColumnString}" Binding="{Binding BufferDistance}" IsVisible="True" Width="*"/>
                <DataGridTextColumn Header="{Binding TimeColumnString}" Binding="{Binding BufferTime}" IsVisible="True" Width="*"/>
            </DataGrid.Columns>
        </DataGrid>

Tobias Johansson

@kvalitetskontrollMarkaryd

@dlukach_gitlab You should not define columns if AutoGenerateColumns="True" and Items should bind to a ObservableCollection on the ViewModel. If you define Columns each column should be bound to the correct Property of that Class that defines the Collection.

ShrutiJaiswal1494

@ShrutiJaiswal1494

Hey All, I have High Contrast (Settings->Ease of Access->High Contrast) mode enabled with a High Contrast Black Theme selected on my computer. When I run my Avalonia Application it still shows me the same colors (attached a picture below). Seems like it is not changing based on the high contrast theme that I have selected. However the WPF applications are changing colors by default based on the theme selected. Is there something I need to add to my application to make sure Avalonia responds to the high contrast mode? Any help is much appreciated. Thanks.

Daniusvl

@Daniusvl

2 replies

Hello pls help

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