c# - 列表框控件模板对象忽略大小属性

Question

我几乎是 WPF C# 编程的初学者，对于愚蠢的问题，我深表歉意。

描述：在 ListBox 中，我定义了 ControlTemplate。在其中也有“PieDiagram”对象。“PieDiagram”对象有一个属性“Size”，它总是被忽略 - 例如，当我在值 50 上设置“Size”时，没有任何变化。我还尝试将 ListBox.Template 的任何其他“子项”设置为固定大小，但随后我遇到一个问题，即整个内容已更改/重新缩放（连同用于设置数量的文本和图表行 - 看图片） .

目标：我想要的只是改变“PieDiagram”对象的大小——所以饼必须比线结束和设置的箭头更小。

如果需要了解问题的任何其他问题，请写在评论部分。谢谢！

代码在视图中：

<Grid>
    <!--  Diagram  -->
    <ListBox
        x:Name="LstBox"
        PreviewMouseRightButtonDown="ListBox_PreviewMouseRightButtonDown"
        RenderTransformOrigin="0.5,0.5">

        <ListBox.LayoutTransform>
            <RotateTransform Angle="0" CenterX="0.5" CenterY="0.5" />
        </ListBox.LayoutTransform>
        <ListBox.RenderTransform>
            <ScaleTransform CenterX="0.5" CenterY="0.5" ScaleX="1" ScaleY="1" />
        </ListBox.RenderTransform>

        <ListBox.Template>
            <ControlTemplate>
                <Border>
                    <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
                        <Border>
                            <Border.Background>
                                <VisualBrush>
                                    <VisualBrush.Visual>
                                        <pie:MultiPieChart
                                            x:Name="chart1"
                                            HorizontalAlignment="Center"
                                            VerticalAlignment="Center"
                                            DataBrushes="{Binding DataBrushes, UpdateSourceTrigger=PropertyChanged}"
                                            DataList="{Binding PieDataCol, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
                                            Size="50">
                                            <pie:MultiPieChart.LayoutTransform>
                                                <RotateTransform Angle="180" CenterX="0.5" CenterY="0.5" />
                                            </pie:MultiPieChart.LayoutTransform>
                                            <pie:MultiPieChart.RenderTransform>
                                                <ScaleTransform CenterX="0.5" CenterY="0.5" />
                                            </pie:MultiPieChart.RenderTransform>
                                        </pie:MultiPieChart>
                                    </VisualBrush.Visual>
                                </VisualBrush>
                            </Border.Background>
                            <ItemsPresenter />
                        </Border>
                    </ScrollViewer>
                </Border>
            </ControlTemplate>
        </ListBox.Template>

        <ListBox.ItemsSource>
            <StaticResource ResourceKey="DiagramCol" />
        </ListBox.ItemsSource>

        <ListBox.ItemsPanel>
            <ItemsPanelTemplate>
                <Canvas
                    Width="{Binding AreaWidth}"
                    Height="{Binding AreaHeight}"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    IsItemsHost="True">
                    <Canvas.RenderTransform>
                        <TranslateTransform X="{Binding HalfAreaWidth}" Y="{Binding HalfAreaHeight}" />
                    </Canvas.RenderTransform>
                </Canvas>
            </ItemsPanelTemplate>
        </ListBox.ItemsPanel>

        <ListBox.ItemContainerStyle>
            <Style TargetType="ListBoxItem">
                <Setter Property="Canvas.Left" Value="{Binding X}" />
                <Setter Property="Canvas.Bottom" Value="{Binding Y}" />
                <Setter Property="Canvas.ZIndex" Value="{Binding ZindexBinding}" />

                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="ListBoxItem">
                            <ContentPresenter x:Name="Content" />
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </ListBox.ItemContainerStyle>
    </ListBox>
</Grid>

用户控件“MultiPieChart”中的代码：

<UserControl
    ...>
    <Control.Template>
        <ControlTemplate TargetType="{x:Type pie:MultiPieChart}">
            <Image x:Name="PART_PieChart" RenderOptions.BitmapScalingMode="NearestNeighbor" />
        </ControlTemplate>
    </Control.Template>
</UserControl>

CODE 在 UserControl 后面的代码：

private Image _pieChartImage;

public static readonly DependencyProperty SizeProperty = DependencyProperty.Register("Size", 
typeof(double), typeof(MultiPieChart), new PropertyMetadata(100.0, OnPiePropertyChanged));

public double Size
{
    get { return (double)GetValue(SizeProperty); }
    set { SetValue(SizeProperty, value); }
}

private void CreatePieChart()
{
    if (_pieChartImage != null)
    {
        if (!double.IsNaN(Size) && DataList != null && DataList.Any())
        {
            _pieChartImage.Width = _pieChartImage.Height = Width = Height = Size;
           ...
        }
    }
}