Added an "About" dialog.

ui/src/main/java/edu/wpi/grip/ui/Main.java

@@ -43,6 +43,8 @@ public class Main extends Application {
     private final Object dialogLock = new Object();
     private Parent root;
 
+    private static Main instance;
+
     public static void main(String[] args) {
         launch(args);
     }
@@ -77,6 +79,7 @@ public void start(Stage stage) throws Exception {
         stage.setScene(new Scene(root));
         stage.show();
 
+        instance = this;
     }
 
     public void stop() {
@@ -118,4 +121,8 @@ public final void onUnexpectedThrowableEvent(UnexpectedThrowableEvent event) {
             }
         });
     }
+
+    public static Main getInstance() {
+        return instance;
+    }
 }

ui/src/main/java/edu/wpi/grip/ui/MainWindowController.java

@@ -206,6 +206,12 @@ public void showProjectSettingsEditor() {
         });
     }
 
+    @FXML
+    public void showProjectAboutDialog() {
+        ProjectAboutDialog projectAboutDialog = new ProjectAboutDialog(root);
+        projectAboutDialog.showAndWait();
+    }
+
     @FXML
     public void quit() {
         if (showConfirmationDialogAndWait()) {

ui/src/main/java/edu/wpi/grip/ui/ProjectAboutDialog.java

@@ -0,0 +1,82 @@
+package edu.wpi.grip.ui;
+
+import com.sun.deploy.uitoolkit.impl.fx.HostServicesFactory;
+import edu.wpi.grip.ui.util.DPIUtility;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Parent;
+import javafx.scene.control.*;
+import javafx.scene.control.Dialog;
+import javafx.scene.control.Label;
+import javafx.scene.image.*;
+import javafx.scene.image.Image;
+import javafx.scene.layout.GridPane;
+import javafx.scene.text.Font;
+
+/**
+ * A JavaFX dialog that displays information about the application (such as the version number)
+ */
+public class ProjectAboutDialog extends Dialog<ButtonType> {
+
+    public ProjectAboutDialog(Parent root) {
+        super();
+
+        GridPane grid = new GridPane();
+        grid.setVgap(10);
+        grid.setAlignment(Pos.TOP_LEFT);
+
+        ImageView img = new ImageView(new Image("edu/wpi/grip/ui/icons/grip-title.png"));
+
+        grid.add(img, 0, 0);
+
+        Label versionLabel = new Label("Version " + edu.wpi.grip.core.Main.class.getPackage().getImplementationVersion());
+        // makes the version label look a little bit better aligned (looks too far to the left otherwise)
+        versionLabel.setPadding(new Insets(0, 0, 0, 1));
+        Font versionLabelFont = new Font(16.0);
+        versionLabel.setFont(versionLabelFont);
+        grid.add(versionLabel, 0, 1, 3, 1);
+
+        Hyperlink githubLink = new Hyperlink();
+        githubLink.setText("GRIP on Github");
+        githubLink.setPadding(new Insets(0, 0, 0, 0));
+        githubLink.setOnAction(event -> {
+            HostServicesFactory.getInstance(Main.getInstance()).showDocument("https://github.com/WPIRoboticsProjects/GRIP");
+        });
+        grid.add(githubLink, 0, 2);
+
+        Hyperlink issuesLink = new Hyperlink();
+        issuesLink.setText("Issues List");
+        issuesLink.setPadding(new Insets(0, 0, 0, 0));
+        issuesLink.setOnAction(event -> {
+            HostServicesFactory.getInstance(Main.getInstance()).showDocument("https://github.com/WPIRoboticsProjects/GRIP/issues");
+        });
+        grid.add(issuesLink, 0, 3);
+
+        Hyperlink wikiLink = new Hyperlink();
+        wikiLink.setText("Wiki");
+        wikiLink.setPadding(new Insets(0, 0, 0, 0));
+        wikiLink.setOnAction(event -> {
+            HostServicesFactory.getInstance(Main.getInstance()).showDocument("https://github.com/WPIRoboticsProjects/GRIP/wiki");
+        });
+        grid.add(wikiLink, 0, 4);
+
+        Hyperlink operationsLink = new Hyperlink();
+        operationsLink.setText("Operation Reference");
+        operationsLink.setPadding(new Insets(0, 0, 0, 0));
+        operationsLink.setOnAction(event -> {
+            HostServicesFactory.getInstance(Main.getInstance()).showDocument("https://github.com/WPIRoboticsProjects/GRIP/wiki/Operation-Reference-Table");
+        });
+        grid.add(operationsLink, 0, 5);
+
+        DialogPane pane = getDialogPane();
+        pane.getButtonTypes().setAll(ButtonType.OK);
+        pane.setContent(grid);
+        pane.styleProperty().bind(root.styleProperty());
+        pane.getStylesheets().addAll(root.getStylesheets());
+        pane.setPrefSize(DPIUtility.ABOUT_DIALOG_WIDTH, DPIUtility.ABOUT_DIALOG_HEIGHT );
+
+        setTitle("About GRIP");
+        setHeaderText("About GRIP");
+        setResizable(true);
+    }
+}

ui/src/main/java/edu/wpi/grip/ui/util/DPIUtility.java

@@ -16,6 +16,8 @@ public class DPIUtility {
     public final static double LARGE_ICON_SIZE = 48.0 * (isManualHiDPI() ? HIDPI_SCALE : 1.0);
     public final static double STROKE_WIDTH = 2.0 * (isManualHiDPI() ? HIDPI_SCALE : 1.0);
     public final static double SETTINGS_DIALOG_SIZE = 400.0 * (isManualHiDPI() ? HIDPI_SCALE : 1.0);
+    public final static double ABOUT_DIALOG_WIDTH = 400.0 * (isManualHiDPI() ? HIDPI_SCALE : 1.0);
+    public final static double ABOUT_DIALOG_HEIGHT = 200.0 * (isManualHiDPI() ? HIDPI_SCALE : 1.0);
 
     private static boolean isManualHiDPI() {
         // We need to do manual size adjustments for HiDPI on Linux.  JavaFX automatically does this on Windows and OSX

ui/src/main/resources/edu/wpi/grip/ui/MainWindow.fxml

@@ -132,6 +132,9 @@
                     </graphic>
                 </MenuItem>
             </Menu>
+            <Menu text="Help">
+                <MenuItem text="About" onAction="#showProjectAboutDialog" />
+            </Menu>
         </MenuBar>
         <SplitPane dividerPositions="0.6" orientation="VERTICAL" VBox.vgrow="ALWAYS">
             <items>