我有一个最小的示例:控制器,主文件,带有一个按钮和两个textArea的fxml文件,一个输入,另一个输出。按下按钮时,输入将打印在输出中。当我将按钮的动作插入fxml(onaction =“#printOutput”)时,它可以正常工作。 我想知道如何(为什么不可以)在控制器中执行相同的操作而不必处理fxml。注意:我来自Android,我避免在xml中实现相同的功能,因为调试起来非常困难,而且它不提供灵活性。文件如下:
控制器
public class FxFXMLController {
@FXML private TextField inputText;
@FXML private TextArea outputText;
@FXML private Button okBtn;
//Do I connect here an okBtn.setaction() with printOutput? if not,where?
public FxFXMLController() {
// Nothing
}
@FXML
private void printOutput() {
// insert this into outputText in fxml file: onaction="#printOutput"
outputText.setText(inputText.getText());
}
}
主要
public class FxFXMLExample3 extends Application {
public static void main(String[] args) {
Application.launch(args);
}
@Override
public void start(Stage stage) throws IOException {
FXMLLoader loader = new FXMLLoader();
VBox root = (VBox) loader.load((getclass().getResource("FxFXMLExample3.fxml")));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.setTitle("A FXML Example with a Controller");
stage.show();
}
}
FXML
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<VBox fx:id="vbox" layoutX="10.0" layoutY="10.0" prefHeight="250.0" prefWidth="300.0" spacing="10" xmlns="http://javafx.com/javafx/10.0.2-internal" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.FxFXMLController">
<style>
-fx-padding: 10;
-fx-border-style: solid inside;
-fx-border-width: 2;
-fx-border-insets: 5;
-fx-border-radius: 5;
-fx-border-color: blue;
</style>
<Label fx:id="inputLbl" alignment="CENTER_LEFT" cache="true" cacheHint="SCALE" prefHeight="30.0" prefWidth="200.0" text="Please insert Your Input here:" textAlignment="LEFT" />
<TextField fx:id="inputText" prefWidth="100.0" />
<Button fx:id="okBtn" alignment="CENTER_RIGHT" contentDisplay="CENTER" mnemonicParsing="false" text="OK" textAlignment="CENTER" />
<Label fx:id="outputLbl" alignment="CENTER_LEFT" cache="true" cacheHint="SCALE" prefHeight="30.0" prefWidth="200.0" text="Your Input:" textAlignment="LEFT" />
<TextArea fx:id="outputText" prefHeight="100.0" prefWidth="200.0" wraptext="true" />
</VBox>