Ensure cross-platform compatibility

build.gradle

@@ -3,7 +3,6 @@ plugins {
     id "application"
     id "checkstyle"
     id "com.github.johnrengelman.shadow" version "5.1.0"
-    id 'org.openjfx.javafxplugin' version '0.0.8'
 }
 
 group "bari"
@@ -14,18 +13,25 @@ repositories {
 }
 
 dependencies {
+    implementation group: "org.openjfx", name: "javafx-base", version: "11", classifier: "win"
+    implementation group: "org.openjfx", name: "javafx-base", version: "11", classifier: "mac"
+    implementation group: "org.openjfx", name: "javafx-base", version: "11", classifier: "linux"
+    implementation group: "org.openjfx", name: "javafx-controls", version: "11", classifier: "win"
+    implementation group: "org.openjfx", name: "javafx-controls", version: "11", classifier: "mac"
+    implementation group: "org.openjfx", name: "javafx-controls", version: "11", classifier: "linux"
+    implementation group: "org.openjfx", name: "javafx-fxml", version: "11", classifier: "win"
+    implementation group: "org.openjfx", name: "javafx-fxml", version: "11", classifier: "mac"
+    implementation group: "org.openjfx", name: "javafx-fxml", version: "11", classifier: "linux"
+    implementation group: "org.openjfx", name: "javafx-graphics", version: "11", classifier: "win"
+    implementation group: "org.openjfx", name: "javafx-graphics", version: "11", classifier: "mac"
+    implementation group: "org.openjfx", name: "javafx-graphics", version: "11", classifier: "linux"
     testImplementation "org.junit.jupiter:junit-jupiter:5.5.1"
 }
 
 checkstyle {
     toolVersion = "8.23"
 }
 
-javafx {
-    version = "12.0.2"
-    modules = [ 'javafx.controls', 'javafx.fxml' ]
-}
-
 shadowJar {
     archiveBaseName = "bari"
     archiveVersion = "1.0.0"

src/main/resources/view/DialogBox.fxml

@@ -7,7 +7,7 @@
 
 <fx:root alignment="CENTER_RIGHT" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308"
          prefWidth="400.0" spacing="10.0" type="javafx.scene.layout.HBox"
-         xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1">
+         xmlns="http://javafx.com/javafx/11" xmlns:fx="http://javafx.com/fxml/1">
     <padding>
         <Insets bottom="15.0" left="5.0" right="5.0" top="15.0"/>
     </padding>

src/main/resources/view/MainWindow.fxml

@@ -7,7 +7,7 @@
 <?import javafx.scene.layout.VBox?>
 
 <AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="600.0"
-            prefWidth="400.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1"
+            prefWidth="400.0" xmlns="http://javafx.com/javafx/11" xmlns:fx="http://javafx.com/fxml/1"
             fx:controller="bari.MainWindow">
     <TextField fx:id="userInput" layoutY="558.0" onAction="#handleUserInput" prefHeight="41.0" prefWidth="324.0"
                AnchorPane.bottomAnchor="1.0"/>