Kickstart Kotlin Open JavaFX 14

Submitted by Dickens A S on Fri, 09/18/2020 - 17:14

Easily create Kotlin based JavaFX using boilerplate Gradle DSL

GitHub https://github.com/dickensas/kotlin-gradle-templates/tree/master/kotlin-javafx

Kotlin Code

import javafx.application.Application
import javafx.fxml.FXMLLoader
import javafx.scene.Parent
import javafx.scene.Scene
import javafx.stage.Stage


class App : Application() {
    public override fun start(primaryStage:Stage) {
        try {
            var root:Parent = FXMLLoader.load(App::class.java.getResource("App.fxml"));
            var scene:Scene = Scene(root)
            scene.getStylesheets().add(App::class.java.getResource("App.css").toExternalForm())
            primaryStage.setTitle("Example")
            primaryStage.setScene(scene)
            primaryStage.show()
        } catch (e:Exception) {
            e.printStackTrace()
        }
    }
    companion object {
        fun main(args: Array<String>) {
        }
    }
}

FXML Code

<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.web.*?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.Pane?>

<AnchorPane prefHeight="400.0" prefWidth="600.0"
	xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1"
	fx:controller="com.zigma.Controller">
	<children>
		<VBox AnchorPane.bottomAnchor="50.0" AnchorPane.leftAnchor="0.0"
			AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
			<children>
				<HBox VBox.vgrow="ALWAYS">
					<children>
						<TextArea fx:id="box1" HBox.hgrow="ALWAYS" />
						<TextArea fx:id="box2" HBox.hgrow="ALWAYS" />
					</children>
				</HBox>
			</children>
		</VBox>
		<BorderPane maxHeight="50.0" minHeight="50.0"
			AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0"
			AnchorPane.rightAnchor="0.0">
			<center>
				<Button fx:id="mybutton" maxHeight="50"
					mnemonicParsing="false" prefHeight="50.0"
					prefWidth="200.0" text="Button" visible="false" />
			</center>
		</BorderPane>
	</children>
</AnchorPane>

run the gradle command

gradlew run

That's All!!

Gradle dependency named configuration

val openjfx by configurations.creating

 Gradle Dependency

    implementation("org.openjfx:javafx-base:14:${platform}")
    implementation("org.openjfx:javafx-graphics:14:${platform}")
    implementation("org.openjfx:javafx-controls:14:${platform}")
    implementation("org.openjfx:javafx-fxml:14:${platform}")
    implementation("org.openjfx:javafx-media:14:${platform}")
    implementation("org.openjfx:javafx-web:14:${platform}")
    
    openjfx("org.openjfx:javafx-base:14:${platform}")
    openjfx("org.openjfx:javafx-graphics:14:${platform}")
    openjfx("org.openjfx:javafx-controls:14:${platform}")
    openjfx("org.openjfx:javafx-fxml:14:${platform}")
    openjfx("org.openjfx:javafx-media:14:${platform}")
    openjfx("org.openjfx:javafx-web:14:${platform}")

Get the OpenJFX to local directory before invoking java command

tasks.withType<JavaExec> {
    main  = "com.zigma.App"
    dependsOn("copyFXLibs")
}
    register("copyFXLibs", Copy::class) {
        from(openjfx)
        into("fxlib")
    }

JVM arguments

application {
    mainClassName = "com.zigma.App"
    applicationDefaultJvmArgs = listOf(
        "--module-path=fxlib",
        "--add-modules=javafx.controls,javafx.fxml,javafx.web"
    )
}

 

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