DataTemplate adaptation is wrong in ItemsRepeater about avalonia.controls.itemsrepeater HOT 5 OPEN

As a workaround: would a Converter help you instead of two DataTemplates?

from avalonia.controls.itemsrepeater.

@timuenie
Thank you for your reply.

The sample I presented is a minimally reproducible code.
In production, the two DataTemplates are different in structure form each other.

For example. Here's another one I made up artificially

        <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled">
            <ItemsRepeater Items="{Binding Items}">
                <ItemsRepeater.Layout>
                    <UniformGridLayout MinItemWidth="60" MinItemHeight="30" Orientation="Vertical" />
                </ItemsRepeater.Layout>

                <ItemsRepeater.ItemTemplate>
                    <views:DataTemplateSelector>
                        <views:DataTemplateSelector.Under100DataTemplate>
                            <DataTemplate DataType="viewModels:DataViewModel">
                                <StackPanel Width="60" Orientation="Horizontal">
                                    <Rectangle
                                        Width="16"
                                        Height="16"
                                        Fill="Red" />
                                    <TextBlock Foreground="Red" Text="{Binding Index}" />
                                </StackPanel>
                            </DataTemplate>
                        </views:DataTemplateSelector.Under100DataTemplate>

                        <views:DataTemplateSelector.Over100DataTemplate>
                            <DataTemplate DataType="viewModels:DataViewModel">
                                <Button
                                    Content="{Binding Index}"
                                    Foreground="Green" />
                            </DataTemplate>
                        </views:DataTemplateSelector.Over100DataTemplate>
                    </views:DataTemplateSelector>
                </ItemsRepeater.ItemTemplate>
            </ItemsRepeater>
        </ScrollViewer>

Does your workaround still work in this situation?

from avalonia.controls.itemsrepeater.

I also have a workaround for this situation.

Just to be clear: I didn't say here you have a workaround, so this issue doesn't need to be fixed. But at the moment there are lots of efforts going on to prepare 11.0, so I don't know when this issue gets addressed. If you know a solution, PRs are welcome 🤗

My other workaround only works if you have two different DataTemplates: place both different controls into one DataTemplate and bind their IsVisible to the bool property you have.

And I have a third option: Use Avalonia.Behaviors

Happy coding

from avalonia.controls.itemsrepeater.

Related? #6

from avalonia.controls.itemsrepeater.

@timuenie
Thank you for your reply.

I was able to isolate whether this problem was on the Avalonia side or my implementation.

Thanks for the workaround suggestion.
I have confirmed that the problem is only reproduced with ItemsRepeater. I will work on using ItemsControl.

ItemsControl does not work with virtualization, but the rest of the operation is as desired. I will consider the ItemsRepeater issue after I have more knowledge of Avalonia myself. Or I will implement a panel that virtualization works.

Avalonia.Behaviors was my first attempt at using Avalonia. I myself am an experienced WPF user and tried to handle this with DataTriggerBehavior, but had the same problem.

Thank you again for your help.

from avalonia.controls.itemsrepeater.