QML键盘快捷键会干扰按键OnPressed事件

问题描述

我的QML程序有问题.在顶层main.qml文件中，我有一些类似这样的键盘快捷键:

I'm having an issue with my QML program. In the top-level main.qml file, I have some keyboard Shortcuts like so:

Shortcut {
  sequence: "Up"
  onActivated: {
    // yadda yadda
  }
}

在另一个文件中，我有几个Keys.onPressed调用，如下所示:

In another file, I have several Keys.onPressed calls like this:

Keys.onPressed: {
  if (event.key == Qt.Key_Up) {
    // yadda yadda
  }
}

显然，快捷方式会干扰OnPressed调用.当我注释掉快捷方式时，OnPressed的工作正常.但是当它们都处于活动状态时，快捷键似乎会拦截键盘按下并阻止OnPressed激活.

Apparently, the Shortcuts are interfering with the OnPressed calls. When I comment out the Shortcuts, the OnPressed's work fine. But when they're both active, it seems the Shortcut intercepts the keyboard press and prevents the OnPressed from activating.

我知道在发生鼠标事件时，Qt具有"accepted"变量.如果希望事件继续在堆栈中向下传播，则只需在OnActivated函数中设置"accepted = false"即可.但是，我没有在Shortcuts API中看到任何等效的接受"变量.还有其他方法可以确保事件正确传播吗?

I know that with mouse events, Qt has the "accepted" variable. If you want an event to continue propagating down the stack, you can just set "accepted = false" in the OnActivated function in order to accomplish this. However, I am not seeing any equivalent "accepted" variable in the Shortcuts API. Is there some other way I can ensure that the event is propagated correctly?

推荐答案

要像快捷方式一样，Shortcut必须具有比活动焦点项中的键处理程序更高的优先级.否则，它将与普通的密钥处理程序没有什么不同.但是，有时像您一样需要覆盖快捷方式.

In order to act like a shortcut, Shortcut must have a higher priority than key handlers in active focus items. Otherwise it would be no different to a normal key handler. However, sometimes there is a need to override a shortcut, like you do.

在Qt 5.8和更低版本中，您可以禁用 a Shortcut，以防止其在某些情况下处理快捷方式事件.例如:

In Qt 5.8 and earlier, you can disable a Shortcut to prevent it processing shortcut events under certain conditions. For example:

Shortcut {
    enabled: !someItem.activeFocus
}

在Qt 5.9中，为此引入了更好的机制.现在，具有键处理程序的活动焦点项目可以通过使用 Keys.shortcutOverride .例如:

In Qt 5.9, a better mechanism has been introduced for this. Active focus items with key handlers can now override shortcuts by accepting shortcut override events using Keys.shortcutOverride. For example:

Item {
    focus: true
    Keys.onShortcutOverride: {
        if (event.key == Qt.Key_Up)
            event.accepted = true
    }
    Keys.onUpPressed: ...
}

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