javafx 8 fxml negation

问题

Using FXML with JavaFx 8.

I have few ToggleButtons in toggleGroup, defined as:

<ToggleGroup fx:id="operater" />

I want to disable OK button, when no operater is selected. Actually, I want to negate the disable expression in ok button:

<Button disable="${operater.selectedToggle.selected}" fx:id="ok" text="OK" mnemonicParsing="false" onAction="#okClick"  >

I have tried with ! and with not(), but no success.

Thanks.

回答1:

You can use an expression binding:

disable="${!operater.selectedToggle.selected}"

operater is spelt operator.

来源：https://stackoverflow.com/questions/26539934/javafx-8-fxml-negation