不带编辑菜单的对话框中的Cocoa键盘快捷键 [英] Cocoa Keyboard Shortcuts in Dialog without an Edit Menu

问题描述

我有一个 LSUIElement 应用程序，显示菜单状态项。应用程序可以显示包含文本字段的对话框窗口。

I have an LSUIElement application that displays a menubar status item. The application can display a dialog window that contains a text field.

如果用户右键单击/控制单击文本字段，将出现一个允许剪切，复制，粘贴等。但是，标准的Command-X，Command-C和Command-V键盘快捷键在该字段中不起作用。我假设这是因为我的应用程序不提供一个编辑菜单，其中定义了这些快捷方式。

If the user right-clicks/control-clicks the text field, a menu appears that allows cut, copy, paste, etc. However, the standard Command-X, Command-C, and Command-V keyboard shortcuts do not work in the field. I assume this is because my application does not provide an Edit menu with those shortcuts defined.

我已经尝试添加一个编辑菜单项到我的应用程序的菜单， 发送一些代码博客，但是没有工作。可以使用编辑菜单中的菜单项，但是键盘快捷键仍然不起作用。

I've tried adding an Edit menu item to my application's menu, as suggested in the Ship Some Code blog, but that did not work. The menu items in the Edit menu can be used, but keyboard shortcuts still don't work.

我可以想象几种方法来破解键盘处理，但是

I can imagine a few ways to hack the keyboard handling, but is there a "recommended" way to make this work?

（有关应用程序的详细信息，请参阅 Menubar倒计时。）

(For details about the app, see Menubar Countdown.)

相关问题：

Related question: Copy/Paste Not Working in Modal Window

推荐答案

在模态窗口中复制/粘贴不工作

What worked for me was using The View Solution presented in Copy and Paste Keyboard Shortcuts at CocoaRocket.

基本上，这意味着子类化NSTextField并覆盖 performKeyEquivalent：。

Basically, this means subclassing NSTextField and overriding performKeyEquivalent:.

更新： CocoaRocket网站似乎已不复存在。以下是互联网存档链接： http： //web.archive.org/web/20100126000339/http://www.cocoarocket.com/articles/copypaste.html

Update: The CocoaRocket site is apparently gone. Here's the Internet Archive link: http://web.archive.org/web/20100126000339/http://www.cocoarocket.com/articles/copypaste.html

编辑：Swift代码如下所示

Edit: The Swift code looks like this

class Editing: NSTextField {

  private let commandKey = NSEventModifierFlags.CommandKeyMask.rawValue
  private let commandShiftKey = NSEventModifierFlags.CommandKeyMask.rawValue | NSEventModifierFlags.ShiftKeyMask.rawValue
  override func performKeyEquivalent(event: NSEvent) -> Bool {
    if event.type == NSEventType.KeyDown {
      if (event.modifierFlags.rawValue & NSEventModifierFlags.DeviceIndependentModifierFlagsMask.rawValue) == commandKey {
        switch event.charactersIgnoringModifiers! {
        case "x":
          if NSApp.sendAction(Selector("cut:"), to:nil, from:self) { return true }
        case "c":
          if NSApp.sendAction(Selector("copy:"), to:nil, from:self) { return true }
        case "v":
          if NSApp.sendAction(Selector("paste:"), to:nil, from:self) { return true }
        case "z":
          if NSApp.sendAction(Selector("undo:"), to:nil, from:self) { return true }
        case "a":
          if NSApp.sendAction(Selector("selectAll:"), to:nil, from:self) { return true }
        default:
          break
        }
      }
      else if (event.modifierFlags.rawValue & NSEventModifierFlags.DeviceIndependentModifierFlagsMask.rawValue) == commandShiftKey {
        if event.charactersIgnoringModifiers == "Z" {
          if NSApp.sendAction(Selector("redo:"), to:nil, from:self) { return true }
        }
      }
    }
    return super.performKeyEquivalent(event)
  }
}

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