如何让菜单子菜单项保持打开状态? [英] How can I keep a menu submenu item open?

问题描述

我正在尝试创建一个有点复杂的菜单项，它允许用户创建一个新类.我遇到的问题是，当我单击数字上下(来自 xceed 工具包)菜单项关闭时，即使属性 StaysOpenOnClick 设置为 true.

I'm trying to create a somewhat complex menu item that would allow a user to create a new class. The problem into which I am running is that when I click on a numeric up-down ( from the xceed toolkit ) that the menu item closes, even with the property StaysOpenOnClick set to true.

用户不会喜欢那样的.

要重现，请创建一个 WPF 项目并通过 NuGet 添加扩展 WPF 工具包，然后将以下代码放入您的主窗口类中:

To reproduce, create a WPF project and add the Extended WPF Toolkit through NuGet, then drop the following code into your mainwindow class :

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local="clr-namespace:WhyDoesMyMenuItemCloseWhenClicked"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
    mc:Ignorable="d"
    x:Class="WhyDoesMyMenuItemCloseWhenClicked.MainWindow"
    Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="21"/>
            <RowDefinition />
        </Grid.RowDefinitions>
        <Menu FontWeight="Bold">
            <MenuItem Header="_File">
                <MenuItem StaysOpenOnClick="True">
                    <Grid Height="50" Width="50">
                        <xctk:IntegerUpDown/>
                    </Grid>
                </MenuItem>
            </MenuItem>
        </Menu>
    </Grid>
</Window> 

当我上下单击整数的文本字段时，菜单关闭.

When I click the text field of the integer up-down, the menu closes.

为什么会一直这样?我怎样才能让它不发生?

Why does that keep happening? How can I make it NOT happen?

推荐答案

我想出了一个解决方案.这是一种非常糟糕的解决方法，但它可以很好地完成工作:

I have figured out a solution. It is sort of a terribly hacky workaround, but it does the job quite well :

变化是您在 MenuItem 中创建了一个 MenuItem.然后您在子 MenuItem 的 MenuItem.Header 属性中定义您的控件，并设置该 MenuItem 的 StaysOpenOnClick 属性为 true.

The change is that you create a MenuItem within the MenuItem. Then you define your control within the sub MenuItem's MenuItem.Header property, and set that MenuItem's StaysOpenOnClick property to true.

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local="clr-namespace:WhyDoesMyMenuItemCloseWhenClicked"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
    mc:Ignorable="d"
    x:Class="WhyDoesMyMenuItemCloseWhenClicked.MainWindow"
    Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="21"/>
            <RowDefinition />
        </Grid.RowDefinitions>
        <Menu FontWeight="Bold">
            <MenuItem Header="_File" StaysOpenOnClick="True">
                <MenuItem Header="_StaysOpenOnClick">
                    <MenuItem StaysOpenOnClick="True">
                        <MenuItem.Header>
                            <xctk:IntegerUpDown/>
                        </MenuItem.Header>
                    </MenuItem>
                </MenuItem>
            </MenuItem>
        </Menu>
    </Grid>
</Window>

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