Problème d'alignement de l'en-tête WPF Groupbox

Question

Comment puis-je aligner l'en-tête Groupbox au centre plutôt que sur le positionnement de gauche par défaut.

J'ai lu dans de nombreux articles que l'on peut utiliser le modèle, mais je n'ai aucune idée de telle chose. Alors s'il vous plaît laissez-moi savoir comment puis-je obtenir l'en-tête au centre.

Merci !!

Answer 1

Oui, vous devrez modifier le modèle.

Pour Alignement central voir Cette réponse par Thomas Levesque
Pour Alignement droit voir Cette réponse par Mihir Gokani

Téléchargé un exemple de projet contenant les deux Alignement central et Alignement droit ici: http://www.mediafire.com/?hd2vbwr97ep7yis

Alignement central utilisant la même approche que Thomas

Utilisable comme ça

<GroupBox Header="Centered Header"
          Style="{StaticResource CenteredHeaderGroupBoxStyle}"
          .../>

Centre

<local:CenterBorderGapMaskConverter x:Key="CenterBorderGapMaskConverter"/>
<Style x:Key="CenteredHeaderGroupBoxStyle" TargetType="{x:Type GroupBox}">
    <Setter Property="BorderBrush" Value="#D5DFE5"/>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type GroupBox}">
                <Grid SnapsToDevicePixels="true">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="6"/>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="6"/>
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="*"/>
                        <RowDefinition Height="6"/>
                    </Grid.RowDefinitions>
                    <Border BorderBrush="Transparent" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.ColumnSpan="4" Grid.Column="0" CornerRadius="4" Grid.Row="1" Grid.RowSpan="3"/>
                    <Border Grid.ZIndex="2" x:Name="Header" Grid.Column="2" HorizontalAlignment="Center" Padding="3,1,3,0" Grid.Row="0" Grid.RowSpan="2">
                        <ContentPresenter ContentSource="Header" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    </Border>
                    <ContentPresenter Grid.ColumnSpan="2" Grid.Column="1" Margin="{TemplateBinding Padding}" Grid.Row="2" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    <Border RenderTransformOrigin="0.5,0.5" BorderBrush="White" BorderThickness="{TemplateBinding BorderThickness}" Grid.ColumnSpan="4" CornerRadius="4" Grid.Row="1" Grid.RowSpan="3">
                        <Border.OpacityMask>
                            <MultiBinding ConverterParameter="7" Converter="{StaticResource CenterBorderGapMaskConverter}">
                                <Binding ElementName="Header" Path="ActualWidth"/>
                                <Binding Path="ActualWidth" RelativeSource="{RelativeSource Self}"/>
                                <Binding Path="ActualHeight" RelativeSource="{RelativeSource Self}"/>
                            </MultiBinding>
                        </Border.OpacityMask>
                        <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="3">
                            <Border BorderBrush="White" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="2"/>
                        </Border>
                    </Border>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

CenterBorderGapmaskConverter

class CenterBorderGapMaskConverter : IMultiValueConverter
{
    // Methods
    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
    {
        Type type = typeof(double);
        if (values == null
            || values.Length != 3
            || values[0] == null
            || values[1] == null
            || values[2] == null
            || !type.IsAssignableFrom(values[0].GetType())
            || !type.IsAssignableFrom(values[1].GetType())
            || !type.IsAssignableFrom(values[2].GetType()))
        {
            return DependencyProperty.UnsetValue;
        }

        double pixels = (double)values[0];
        double width = (double)values[1];
        double height = (double)values[2];
        if ((width == 0.0) || (height == 0.0))
        {
            return null;
        }
        Grid visual = new Grid();
        visual.Width = width;
        visual.Height = height;
        ColumnDefinition colDefinition1 = new ColumnDefinition();
        ColumnDefinition colDefinition2 = new ColumnDefinition();
        ColumnDefinition colDefinition3 = new ColumnDefinition();
        colDefinition1.Width = new GridLength(1.0, GridUnitType.Star);
        colDefinition2.Width = new GridLength(pixels);
        colDefinition3.Width = new GridLength(1.0, GridUnitType.Star);
        visual.ColumnDefinitions.Add(colDefinition1);
        visual.ColumnDefinitions.Add(colDefinition2);
        visual.ColumnDefinitions.Add(colDefinition3);
        RowDefinition rowDefinition1 = new RowDefinition();
        RowDefinition rowDefinition2 = new RowDefinition();
        rowDefinition1.Height = new GridLength(height / 2.0);
        rowDefinition2.Height = new GridLength(1.0, GridUnitType.Star);
        visual.RowDefinitions.Add(rowDefinition1);
        visual.RowDefinitions.Add(rowDefinition2);
        Rectangle rectangle1 = new Rectangle();
        Rectangle rectangle2 = new Rectangle();
        Rectangle rectangle3 = new Rectangle();
        rectangle1.Fill = Brushes.Black;
        rectangle2.Fill = Brushes.Black;
        rectangle3.Fill = Brushes.Black;
        Grid.SetRowSpan(rectangle1, 2);
        Grid.SetRow(rectangle1, 0);
        Grid.SetColumn(rectangle1, 0);
        Grid.SetRow(rectangle2, 1);
        Grid.SetColumn(rectangle2, 1);
        Grid.SetRowSpan(rectangle3, 2);
        Grid.SetRow(rectangle3, 0);
        Grid.SetColumn(rectangle3, 2);
        visual.Children.Add(rectangle1);
        visual.Children.Add(rectangle2);
        visual.Children.Add(rectangle3);
        return new VisualBrush(visual);
    }
    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
    {
        return new object[] { Binding.DoNothing };
    }
}