JavaFX如何在一个注册表单中结合更多的EventHandlers? [英] JavaFX how to combine more EventHandlers in one registration form?
问题描述
我正在使用JavaFX进行注册。我有按钮提交输入的数据,这是完美的。但我也想允许用户提交数据,当用户按下enter?
如果按下按钮或按下输入时,是否有任何方法合并在一个if语句中? / p>
我知道我可以单独制作它,但接下来我需要将我的代码加倍。
ActionEvent
,然后按键将输入 KeyEvent
。 但是,如果您创建了一个方法数据提交,你只需在两个监听器中调用这个方法,就可以避免代码重复。
submitButton.setOnAction(new EventHandler< ActionEvent>(){
@Override
public void handle(ActionEvent event){
submitData();
}
});
scene.setOnKeyPressed(new EventHandler< KeyEvent>(){
@Override
public void handle(KeyEvent ke){$ b $ switch(ke.getCode()) {
case ENTER:
submitData();
break;
default:
break;
}
}});
或者使用lambda表达式的简短形式:
submitButton.setOnAction(event - > submitData());
scene.setOnKeyPressed(keyEvent - > {
if(keyEvent.getCode()。equals(KeyCode.ENTER))
submitData();
});
I am making registration form in JavaFX. And i have button to submit entered data, which works perfectly. But i also want to allow user to submit data when user press enter ?
Is there any way to combine in one if statement if button is pressed or enter is pressed ?
I know i can make it separately but then i need to double my code.
You have to listen to key press events and button press events separately, there is no way to handle these two events with a single listener: the button press will fire an ActionEvent
and the key press will file a KeyEvent
.
But, if you create a method to make the "data submission" and you simply call this method in the two listeners, you can avoid code duplication.
submitButton.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
submitData();
}
});
scene.setOnKeyPressed(new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent ke) {
switch (ke.getCode()) {
case ENTER:
submitData();
break;
default:
break;
}
}});
Or the same in a short form using lambdas:
submitButton.setOnAction(event -> submitData());
scene.setOnKeyPressed(keyEvent -> {
if(keyEvent.getCode().equals(KeyCode.ENTER))
submitData();
});
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