XAML - 如何拥有全局inputBindings？

Question

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

要定义LOCAL inputbindings,我只需在Window.InputBindings或UserControl.InputBindings中声明输入.

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

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

如果我在2个不同的窗口中有相同的绑定,我必须编码两次.这不符合DRY的理念,我猜有更好的方法......

编辑:在他的回答中,Kent Boogaart建议我使用Style.不幸的是,我无法弄清楚如何定义它.这是代码:

 <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> 

它引发了一个错误:错误MC3080:无法设置Property Setter'InputBindings',因为它没有可访问的set访问器.

我的风格错了吗？还有其他解决方案吗？

有任何想法吗？谢谢!

Answer 1

一种解决方案是使用带有a 的附加属性Style来设置InputBindings应用程序中给定类型的所有控件.不幸的是,既然你不能制作一个"全能" Style(我知道,无论如何),你将不得不为Style你想要设置的每种控件类型创建一个InputBindings(但是,这不应该是太多的控制).下面是一些示例代码,说明如何执行此操作:

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);
        }

    }
}

<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>

<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>

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!"); }
    }
}