Custom Checkbox Datagrid not center

[chuongmep]

Describe the bug

I tried to center header a checkbox custom but it can't same align with cell value

To Reproduce

Example :

 <DataGrid.Columns>
                        <!-- <DataGridCheckBoxColumn Binding="{Binding IsSelected}" Header="Check" /> -->
                        <DataGridTemplateColumn>
                            <DataGridTemplateColumn.Header>
                                <CheckBox HorizontalAlignment="Center"
                                          HorizontalContentAlignment="Center">
                                    <i:Interaction.Behaviors>
                                        <EventTriggerBehavior EventName="Click">
                                            <InvokeCommandAction Command="{Binding CheckAllCommand}" />
                                        </EventTriggerBehavior>
                                    </i:Interaction.Behaviors>
                                </CheckBox>
                            </DataGridTemplateColumn.Header>
                            <DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <CheckBox
                                        HorizontalAlignment="Center"
                                        Click="CheckList_click"
                                        IsChecked="{Binding IsSelected, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
                                </DataTemplate>
                            </DataGridTemplateColumn.CellTemplate>
                        </DataGridTemplateColumn>
 </DataGrid.Columns>

Expected behavior

I hope align will be same

Avalonia version

11.2.3

OS

macOS

Additional context

No response

[timunie]

Use DevTools F12.to check is CheckBox has a MinWidth or Margin set

[chuongmep]

Hi @timunie , MinWidth = 0 and Margin is 0,0,0,0, any help ?

[timunie]

Ah wait the header has a reserved space for SortIcon. You need to override this. Looking up the Theme for DataGridColumnHeader should help you.