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是否可以在 WPF 中为一系列按键定义键绑定，例如 Visual Studio 中的快捷方式，例如Ctrl+ R、Ctrl+A在当前解决方案中运行所有测试

据我所见，我只能使用元素绑定单个组合键，例如Ctrl+ 。S我可以使用此绑定序列还是必须手动处理按键才能执行此操作？

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3 回答 3

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InputGesture您需要通过覆盖该Matches方法来创建自己的 。

像这样的东西：

public class MultiInputGesture : InputGesture
{
    public MultiInputGesture()
    {
        Gestures = new InputGestureCollection();
    }

    public InputGestureCollection Gestures { get; private set; }

    private int _currentMatchIndex = 0;

    public override bool Matches(object targetElement, InputEventArgs inputEventArgs)
    {
        if (_currentMatchIndex < Gestures.Count)
        {
            if (Gestures[_currentMatchIndex].Matches(targetElement, inputEventArgs))
            {
                _currentMatchIndex++;
                return (_currentMatchIndex == Gestures.Count);
            }
        }
        _currentMatchIndex = 0;
        return false;
    }
}

它可能需要更多一点，比如忽略某些事件（例如KeyUp事件之间的KeyDown事件不应该重置_currentMatchIndex），但你明白了......

于 2010-09-02T10:02:17.540 回答
1

@ThomasLevesque 的答案大部分是正确的，但不涉及重复键。（请注意，按住 Ctrl 键会导致生成键重复事件。）如果用户在序列中停顿，超时也很有用。这是我正在使用的：

public class MultiKeyInputGesture : InputGesture {
    private const int MAX_PAUSE_MILLIS = 1500;

    private InputGestureCollection mGestures = new InputGestureCollection();

    private DateTime mLastWhen = DateTime.Now;
    private int mCheckIdx;

    public MultiKeyInputGesture(KeyGesture[] keys) {
        Debug.Assert(keys.Length > 0);

        // Grab a copy of the array contents.
        foreach (KeyGesture kg in keys) {
            mGestures.Add(kg);
        }
    }

    public override bool Matches(object targetElement, InputEventArgs inputEventArgs) {
        if (!(inputEventArgs is KeyEventArgs)) {
            // does this actually happen?
            return false;
        }

        DateTime now = DateTime.Now;
        if ((now - mLastWhen).TotalMilliseconds > MAX_PAUSE_MILLIS) {
            mCheckIdx = 0;
        }
        mLastWhen = now;

        if (((KeyEventArgs)inputEventArgs).IsRepeat) {
            // ignore key-repeat noise (especially from modifiers)
            return false;
        }

        if (!mGestures[mCheckIdx].Matches(null, inputEventArgs)) {
            mCheckIdx = 0;
            return false;
        }

        mCheckIdx++;
        if (mCheckIdx == mGestures.Count) {
            mCheckIdx = 0;
            inputEventArgs.Handled = true;
            return true;
        }

        return false;
    }
}

我通过RoutedUICommand在 XAML 中定义来使用它：

<Window.Resources>
    <RoutedUICommand x:Key="MyCommand" Text="My Command"/>
</Window.Resources>

这是从<Window.CommandBindings>和<MenuItem>照常引用的。然后，在窗口构造函数中，我这样做：

RoutedUICommand ruic = (RoutedUICommand)FindResource("MyCommand");
ruic.InputGestures.Add(
    new MultiKeyInputGesture(new KeyGesture[] {
          new KeyGesture(Key.H, ModifierKeys.Control, "Ctrl+H"),
          new KeyGesture(Key.C, ModifierKeys.Control, "Ctrl+C")
    }) );

我发现这个论坛帖子很有帮助。

You will need to add an explicit InputGestureText to any MenuItem, unless you want to try the DisplayString hack in the linked forum post.

NOTE: the key gesture handler "eats" the key that completes the gesture. If you have more than one handler, and the user tries to use two multi-key sequences in a row (e.g. Ctrl+H, Ctrl+C followed immediately by Ctrl+H, Ctrl+D), the second handler won't reset when Ctrl+C is hit. Instead, it'll reset when the second Ctrl+H arrives, and will miss the combo. The actual behavior is dependent upon the order in which the handlers are called. I'm currently handling this by defining a static event that fires when a match is found, and subscribing all instances to it.

Update: one other thing to be aware of: the order of items in <Window.CommandBindings> matters. If you have a Copy handler that fires on Ctrl+C, it must appear in the list after the multi-key gesture for Ctrl+H, Ctrl+C.

于 2019-06-04T22:31:37.060 回答
-1 
   <KeyBinding x:Name="mykeybinding" Gesture="CTRL+P" Key="E" 
                 Command="mycommand"/>

这似乎对我有用，我必须按 ctrl+P+E 才能执行“mycommand”

基于 http://msdn.microsoft.com/en-in/library/system.windows.input.keybinding.aspx

于 2013-04-16T08:47:56.103 回答