JavaFX

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JavaFX

• Java Platform zur Erstellung Graphischer Applikationen
• nicht in Java SE enthalten

• Nachfolger von AWT und Swing
  ⚠️viele Klassen in mehreren Frameworks
  Beim Importieren aufpassen!

import java.awt.Button;
import javafx.scene.control.Button;

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Maven

• Verwaltet Sourcecode
• Struktur
  
• ProjectObjectModel

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<project xmlns="namespace"
         xmlns:xsi="schemaInstance"
         xsi:schemaLocation="schemaURL">
    <groupId>at.htlstp</groupId>
    <artifactId>MavenProject</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <javaFxVersion>13.0.2</javaFxVersion>
        <maven.compiler.release>14</maven.compiler.release>
    </properties>

    <dependencies>
        <!-- download -->
    </dependencies>
</project>

---

<dependencies>
    <dependency>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-base</artifactId>
        <version>13.0.2</version>
    </dependency>
    <dependency>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-controls</artifactId>
        <version>${javaFxVersion}</version>
    </dependency>
    <dependency>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-graphics</artifactId>
        <version>${javaFxVersion}</version>
    </dependency>
    <dependency>
        <groupId>org.openjfx</groupId>
        <artifactId>javafx-fxml</artifactId>
        <version>${javaFxVersion}</version>
    </dependency>
</dependencies>

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White Screen

public class WhiteStage extends Application {
    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.show();
    }
}

public class Launcher {
    public static void main(String[] args) {
        Application.launch(WhiteStage.class, args);
    }
}

---

Hello World

@Override
public void start(Stage stage) throws Exception {
    Label label = new Label("Hello World");
    Scene scene = new Scene(label, 160, 80);
    stage.setScene(scene);
    stage.show();
}

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Hierarchie

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GridPane

private void setupScene() {
    gridPane.add(textField, 0, 0);
    gridPane.add(button, 1, 0);
    gridPane.add(image, 0, 1, 2, 1);
    gridPane.setHgap(10);
    gridPane.setVgap(10);
    gridPane.setPadding(new Insets(10));
    gridPane.setStyle("-fx-background-color: #c0c0c0");
    gridPane.setGridLinesVisible(true);
}

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Event

• Ausgelöst durch Interaktion mit GUI

• durch element.setOnXXX wird ein Handler definiert

textField.setOnAction(new EventHandler<ActionEvent>() {
    @Override
    public void handle(ActionEvent event) {
        System.out.println(textField.getText());
    }
});
button.setOnAction(new EventHandler<ActionEvent>() {
    @Override
    public void handle(ActionEvent event) {
        System.out.println(event.getSource() + "clicked");
    }
});