c# - 功能区 ApplicationMenu AuxilaryPane Size

Question

如何更改 WPF 功能区 ApplicationMenu 中 AuxilaryPane 的大小？我已将最近的文件列表添加到该区域，但它被截断了。理想情况下，我希望辅助 Pane 像 Word/Excel 一样填满屏幕。

我的代码:

<r:Ribbon.ApplicationMenu>
    <r:RibbonApplicationMenu>
        <r:RibbonApplicationMenu.AuxiliaryPaneContent>
            <StackPanel>
                <TextBlock Text="Recent Files" />
                <Separator />
                <ItemsControl ItemsSource="{Binding RecentFiles}">
                    <ItemsControl.ItemTemplate>
                        <DataTemplate>
                            <r:RibbonApplicationMenuItem Header="{Binding ShortPath}" 
                                                         Command="{Binding DataContext.OpenRecentFileCommand, RelativeSource={RelativeSource AncestorType=ItemsControl}}"
                                                         CommandParameter="{Binding LongPath}"/>
                        </DataTemplate>
                    </ItemsControl.ItemTemplate>
                </ItemsControl>
            </StackPanel>
        </r:RibbonApplicationMenu.AuxiliaryPaneContent>
    </r:RibbonApplicationMenu>                
</r:Ribbon.ApplicationMenu>

Answer 1

根据此线程中的答案，我发现最简单的方法是将 RibbonApplicationMenu 子类化并将第三列的宽度设置为自动。

 public class CustomRibbonApplicationMenu : System.Windows.Controls.Ribbon.RibbonApplicationMenu
    {
        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();

            System.Windows.DependencyObject obj = this.GetTemplateChild("PART_AuxiliaryPaneContentPresenter");

            System.Windows.Controls.ContentPresenter c = obj as System.Windows.Controls.ContentPresenter;

            ((System.Windows.Controls.Grid)((System.Windows.Controls.Border)c.Parent).Parent).ColumnDefinitions[2].Width = System.Windows.GridLength.Auto;
        }
    }

现在你只需要改变你的Ribbon xaml

<Ribbon.ApplicationMenu>
                <RibbonApplicationMenu>

到

<Ribbon.ApplicationMenu>
                <ctrl:CustomRibbonApplicationMenu>