WPF-MouseDown上的弹出菜单，然后使用MouseUp选择

Question

I am trying to create a UserControl that behaves like so:

• A button to start with, and when a user clicks it and holds, a Radial menu appears
• User keeps holding left mouse, and releases on the menu item they want
• I am using this Radial menu https://github.com/Julien-Marcou/RadialMenu

Here is my attempt:

<UserControl x:Class="NetBoard.RadialButton"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:NetBoard"
             xmlns:radial="clr-namespace:RadialMenu.Controls;assembly=RadialMenu"
             mc:Ignorable="d" >
    <Grid>
        <Button Name="Button"
                PreviewMouseDown="Button_MouseDown" 
                PreviewMouseUp="Button_MouseUp" />

        <radial:RadialMenu Name="RadialMenu" />
    </Grid>
</UserControl>

public partial class RadialButton : UserControl
{
    public RadialButton()
    {
        InitializeComponent();

        // Test menu items
        for (int i = 0; i < 3; i++)
        {
            RadialMenu.Content.Add(new RadialMenuItem { Content = i });
        }

        foreach (RadialMenuItem item in RadialMenu.Content)
        {
            item.PreviewMouseLeftButtonUp += Slice_MouseUp;
        }
    }

    private void Button_MouseDown(object sender, MouseButtonEventArgs e)
    {
        RadialMenu.IsOpen = true;
    }

    private void Button_MouseUp(object sender, MouseButtonEventArgs e)
    {
        RadialMenu.IsOpen = false;
    }

    private void Slice_MouseUp(object sender, MouseButtonEventArgs e)
    {
        MessageBox.Show("It worked!");
    }

The radial menu pops up fine, but the PreviewMouseLeftButtonUp event does not fire on the RadialMenuItems. The Menu Items don't even behave like they are being moused-over (they would change color).

Any ideas on how to accomplish this?

Answer 1

我实际上使用Label而不是按钮来实现这一点。