在javaFX中通过KeyCombination触发事件 [英] Triggering an Event by KeyCombination in javaFX

问题描述

我正在尝试设置保存文件的快捷方式。

I am trying to set a shortcut to save a file.

public static final KeyCombination saveShortcut = new KeyCodeCombination(KeyCode.S, KeyCombination.CONTROL_ANY);

我通过以下方式触发行动：

I trigger an action by:

sceneRoot.addEventHandler(KeyEvent.KEY_RELEASED, new EventHandler<KeyEvent>() {
        @Override
        public void handle(KeyEvent event) {
            if (saveShortcut.match(event)) {
                saveProject.fire();
            } 
        }

    });

然而，只需点击 S 键即可触发事件。有关原因的任何想法？

However, the event gets fired by just hitting the S key. Any ideas on why so?

推荐答案

KeyCodeCombination中所有修饰符的默认值构造函数是 RELEASED 。因此，保存快捷方式与 S 键匹配， Shift 已发布， Alt 已发布， Meta 已发布，按下或释放控制（您指定的 ANY 值与按下或释放相匹配）。

The default value for all the modifiers in the KeyCodeCombination constructor is RELEASED. So your save shortcut matches the key S with Shift released, Alt released, Meta released, and Control either pressed or released (the ANY value that you specified matches either pressed or released).

如果您希望这只匹配 Ctrl + S ，您应该使用

If you want this to only match Ctrl+S you should use

public static final KeyCombination saveShortcut = new KeyCodeCombination(KeyCode.S, KeyCombination.CONTROL_DOWN);

更好的是

public static final KeyCombination saveShortcut = new KeyCodeCombination(KeyCode.S, KeyCombination.SHORTCUT_DOWN);

这将匹配适合平台的快捷键（例如 Ctrl + Windows上的 S 和Mac上的 Cmd + S 。

which would match the shortcut key appropriate to the platform (e.g. Ctrl+S on windows and Cmd+S on Mac).

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