JavaFX TabPane禁用按键切换选项卡 [英] JavaFX TabPane disable tab switching by keys

问题描述

我有一个Tab，其中包含一些内容:ScrollBar和其他内容.

I have a Tab with some content: ScrollBar and other.

ScrollBar具有用于键的事件处理程序: left 和 right .

The ScrollBar has event handler for keys: left and right.

但是如果我按这些按钮，则会切换Tabs，因为TabPane也有一个键处理程序.

But if I press these buttons, Tabs are switched, because TabPane also has a key handler.

如何为TabPane禁用默认事件处理程序或更改切换策略?

How to disable default event handler for TabPane or change switching policy?

推荐答案

问题是ScrollBar不是

The problem is that a ScrollBar is not focus traversable by default and key events are only fired for focused Nodes.

您可以设置ScrollBar焦点可遍历:

You can set the ScrollBar focus traversable:

sb.setFocusTraversable(true);

sb.setOnKeyPressed(e -> {
    if ( e.getCode().equals(KeyCode.RIGHT))
        sb.setValue(sb.getValue()+0.01);
    else if(e.getCode().equals(KeyCode.LEFT))
        sb.setValue(sb.getValue()-0.01);
});

在这种情况下，只要将ScrollBar放在焦点上，就会处理关键事件.

In this case whenever the ScrollBar is focused, the key events are handled.

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