XAML - 如何拥有全局 inputBindings? [英] XAML - How to have global inputBindings?

问题描述

我有一个带有多个窗口的 WPF 应用程序.我想定义 GLOBAL inputBindings.

I have a WPF application with several windows. I would like to define GLOBAL inputBindings.

要定义本地输入绑定，我只需在 Window.InputBindings 或 UserControl.InputBindings 中声明输入.

To define LOCAL inputbindings, i just declare the input in Window.InputBindings or UserControl.InputBindings.

要定义 GLOBAL，我希望我可以对 Application 类做同样的事情...

To define GLOBALs, I wish i could do the same with the Application class...

<Application
....>
<Application.InputBindings>
...
</Application.InputBindings>

如果我在 2 个不同的窗口中有相同的绑定，我必须对其进行两次编码.这不符合 D.R.Y. 的理念，我想有更好的方法......

If i have the same binding in 2 different windows, i have to code it twice. This doesn't meet D.R.Y.'s philosophy and i guess there is a better way...

在他的回答中 Kent Boogaart 建议我使用 Style.不幸的是，我不知道如何定义它.这是代码:

EDIT : in his answer Kent Boogaart advices me to use Style. Unfortunately, i can't figure out how to define it. This is the code :

 <Application.Resources>
    <Style TargetType="Window">
        <Setter Property="InputBindings">
            <Setter.Value>
                <Window.InputBindings>
                    <KeyBinding KeyGesture="Ctrl+M" Command="local:App.MsgCommand />
                </Window.InputBindings>
            </Setter.Value>
        </Setter>
    </Style>
</Application.Resources> 

它引发错误:错误 MC3080:无法设置属性设置器InputBindings"，因为它没有可访问的设置访问器.

It raises an error : error MC3080: The Property Setter 'InputBindings' cannot be set because it does not have an accessible set accessor.

我的风格有问题吗?还有其他解决方案吗?

Is my style wrong? Is there another solution?

有什么想法吗?谢谢！

推荐答案

一种解决方案是使用 附加属性 带有 Style 以在应用程序中给定类型的所有控件上设置 InputBindings.不幸的是，由于您无法制作包罗万象"的 Style(无论如何我都知道)，您必须为每种控件类型创建一个 Style您要在其上设置 InputBindings (但是，这不应是太多控件).下面是一些示例代码，展示了如何执行此操作:

One solution is to use an Attached Property with a Style to set the InputBindings on all the controls of a given type in your application. Unfortunately, since you can't make a "catch-all" Style (that I know of, anyway), you'll have to create a Style for each control type on which you want to set the InputBindings (this shouldn't, however, be too many controls). Below is some sample code that shows how to do this:

using System.Windows;
using System.Windows.Input;

namespace WpfApplication1
{
    public class MyAttached
    {
        public static readonly DependencyProperty InputBindingsProperty =
            DependencyProperty.RegisterAttached("InputBindings", typeof(InputBindingCollection), typeof(MyAttached),
            new FrameworkPropertyMetadata(new InputBindingCollection(),
            (sender, e) =>
            {
                var element = sender as UIElement;
                if (element == null) return;
                element.InputBindings.Clear();
                element.InputBindings.AddRange((InputBindingCollection)e.NewValue);
            }));

        public static InputBindingCollection GetInputBindings(UIElement element)
        {
            return (InputBindingCollection)element.GetValue(InputBindingsProperty);
        }

        public static void SetInputBindings(UIElement element, InputBindingCollection inputBindings)
        {
            element.SetValue(InputBindingsProperty, inputBindings);
        }

    }
}

<小时>

<Application x:Class="WpfApplication1.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:loc="clr-namespace:WpfApplication1"
    StartupUri="Window1.xaml">
    <Application.Resources>
        <Style TargetType="TextBox">
            <Setter Property="loc:MyAttached.InputBindings">
                <Setter.Value>
                    <InputBindingCollection>
                        <KeyBinding Key="A" Modifiers="Ctrl" Command="loc:Window1.MyAction" />
                    </InputBindingCollection>
                </Setter.Value>
            </Setter>
        </Style>
        <Style TargetType="Button">
            <Setter Property="loc:MyAttached.InputBindings">
                <Setter.Value>
                    <InputBindingCollection>
                        <KeyBinding Key="A" Modifiers="Ctrl" Command="loc:Window1.MyAction" />
                    </InputBindingCollection>
                </Setter.Value>
            </Setter>
        </Style>
    </Application.Resources>
</Application>

<小时>

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:loc="clr-namespace:WpfApplication1"
    Title="Window1" Height="300" Width="300">
    <Window.CommandBindings>
        <CommandBinding Command="loc:Window1.MyAction" Executed="MyAction_Executed" />
    </Window.CommandBindings>
    <StackPanel>
        <Button Content="Try Ctrl+A Here!" />
        <TextBox Text="Try Ctrl+A Here!" />
    </StackPanel>
</Window>

<小时>

using System.Windows;
using System.Windows.Input;

namespace WpfApplication1
{
    public partial class Window1
    {
        public static readonly RoutedUICommand MyAction = new RoutedUICommand("MyAction", "MyAction", typeof(Window1));

        public Window1() { InitializeComponent(); }

        private void MyAction_Executed(object sender, ExecutedRoutedEventArgs e) { MessageBox.Show("MyAction!"); }
    }
}

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