PROGRAMMING
Php
On Action
p 338 Add ActionApp main class with button action listener method.
/**
* FXML on action method is defined in ...
* Scene Builer 'on Action'
*/
package com.minte9.javafx.on_action;
import javafx.fxml.FXML;
public class ActionApp {
public static void main(String[] args) {
ActionAppGui.main(args);
}
@FXML void buttonPressed() { // Look Here
System.out.println("button pressed");
}
}
Launch
Add ActionAppGui class that loads fxml file.
/**
* Gui class with button.xml loader
*/
package com.minte9.javafx.on_action;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class ActionAppGui extends Application {
public static void main(String[] args) {
launch(args);
}
@Override public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("button.fxml"));
stage.setTitle("Button Event FXML");
stage.setScene(new Scene(root));
stage.show();
}
}
Scene Builder
Set controller and button method (buttonPressed).
Containers / Add VBox
Controllers / Add Button
Controller / ControllerClass ... com.minte9.javafx.on_action.ActionApp
Button / Inspector / Code / On Action ... buttonPressed
Preview / Show Preview in Window
View / Show sample Controller Skeleton
Save ... button.fxml
Instance
Each value for a JavaFX object is used to set object's instance variables.
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.VBox?>
<VBox maxHeight="-Infinity" maxWidth="-Infinity"
minHeight="-Infinity" minWidth="-Infinity"
prefHeight="400.0" prefWidth="600.0"
xmlns="http://javafx.com/javafx/17" xmlns:fx="http://javafx.com/fxml/1"
fx:controller="com.minte9.javafx.on_action.ActionApp">
<children>
<Button mnemonicParsing="false" onAction="#buttonPressed" text="Button" />
</children>
</VBox>
➥ Questions github JavaFX
