button.setOnAction(new EventHandler<ActionEvent>() {
@Override public void handle(ActionEvent e) {
label.setText("Accepted");
}
});
In the code above we are defining what will happen when we press the button. This is all good but I wanna create new ActionListener and then add it to my button. Normally in JButton I can just add ActionListener like this:
button.addActionListener(someControllerClass.createButtonListener());
In code above createButtonListener() returns ActionListener.
My question is: What is the equivalent of JButton addActionListener ?
If you want to eg reuse an EventHandler
, define it like described in JavaFX Documentation as:
EventHandler<ActionEvent> buttonHandler = new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
label.setText("Accepted");
event.consume();
}
};
You can now add your defined buttonHandler
to the onAction
of your button via:
button.setOnAction(buttonHandler);
And citing from the documentation providing the remove option for completeness:
To remove an event handler that was registered by a convenience method, pass null to the convenience method, for example,
node1.setOnMouseDragged(null).
Resulting for you in:
button.setOnAction(null)
The documentation furthermore provides some examples how to add handler for specific events - it's a good read.
相同的方法,但使用 lamda 表达式更容易:
buttonSave.setOnAction(event -> buttonSaveClicked());
I think this is how I should do. Creating the handler:
public EventHandler<Event> createSolButtonHandler()
{
btnSolHandler = new EventHandler<Event>() {
@Override
public void handle(Event event) {
System.out.println("Pressed!");
biddingHelperFrame.getBtnSag().setVisible(false);
}
};
return btnSolHandler;
}
Adding Handler to button:
btnSol.addEventHandler(MouseEvent.MOUSE_CLICKED, biddingHelperFrameController.createSolButtonHandler());
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