first test implementation of an (expandable) list

src/main/java/org/team_pjt/agents/Visualisation.java

@@ -1,15 +1,23 @@
 package org.team_pjt.agents;
 
 import javafx.application.Application;
-import javafx.event.ActionEvent;
-import javafx.event.EventHandler;
 import javafx.scene.Scene;
 import javafx.scene.control.Button;
-import javafx.scene.layout.StackPane;
 import javafx.stage.Stage;
+import javafx.scene.control.TreeCell;
+import javafx.scene.control.TreeItem;
+import javafx.scene.layout.AnchorPane;
+import javafx.scene.control.TreeView;
+import javafx.util.Callback;
+import javafx.scene.layout.VBox;
+import javafx.beans.property.SimpleStringProperty;
+import javafx.scene.paint.Color;
+import javafx.geometry.Insets;
+import javafx.scene.control.Label;
 
-public class Visualisation extends Application {
 
+public class Visualisation extends Application {
+/*
     @Override
     public void start(Stage primaryStage) {
         Button btn = new Button();
@@ -31,4 +39,105 @@ public void handle(ActionEvent event) {
         primaryStage.setScene(scene);
         primaryStage.show();
     }
-    public static void showWindow( ) { launch(new String[] {}); }}
+    public static void showWindow( ) { launch(new String[] {}); }
+
+*/
+
+
+    @Override
+    public void start(Stage stage) {
+        TreeItem<Alert> rootNode = new TreeItem<>(new Alert("dummy", "dummy"));
+        rootNode.setExpanded(true);
+        TreeItem<Alert> groupNode = new TreeItem<>(new Alert("group item", "group item"));
+        groupNode.getChildren().addAll(new TreeItem<>(new Alert("sub item 1", "sub item 1")),
+                new TreeItem<>(new Alert("sub item 2", "sub item 2")),
+                new TreeItem<>(new Alert("sub item 3", "sub item 3")));
+
+        rootNode.getChildren().addAll(new TreeItem<>(new Alert("item 1", "item 1")),
+                groupNode,
+                new TreeItem<>(new Alert("item 2", "item 2")),
+                new TreeItem<>(new Alert("item 3", "item 3")));
+
+        VBox box = new VBox();
+        final Scene scene = new Scene(box, 400, 300);
+        scene.setFill(Color.LIGHTGRAY);
+
+        TreeView<Alert> treeView = new TreeView<>(rootNode);
+        treeView.setShowRoot(false);
+        treeView.setCellFactory(new Callback<TreeView<Alert>, TreeCell<Alert>>() {
+            @Override
+            public TreeCell<Alert> call(TreeView<Alert> p) {
+                return new AlertTreeCell();
+            }
+        });
+
+        box.getChildren().add(treeView);
+        stage.setScene(scene);
+        stage.show();
+    }
+
+    private final class AlertTreeCell extends TreeCell<Alert> {
+
+        private final AnchorPane anchorPane;
+        private final Label label;
+        private final Button button;
+
+        public AlertTreeCell() {
+            anchorPane = new AnchorPane();
+            label = new Label();
+            button = new Button();
+            anchorPane.getChildren().addAll(label, button);
+            anchorPane.setStyle("-fx-border-color: gray");
+            anchorPane.setPadding(new Insets(5));
+            AnchorPane.setRightAnchor(button, 10.0);
+            AnchorPane.setLeftAnchor(label, 15.0);
+        }
+
+        @Override
+        public void updateItem(Alert item, boolean empty) {
+            super.updateItem(item, empty);
+            if (empty) {
+                setText(null);
+                setGraphic(null);
+            } else {
+                setText(null);
+                label.setText(item.getStatus());
+                button.setText(item.getName());
+                setGraphic(anchorPane);
+            }
+        }
+    }
+
+    public static class Alert {
+
+        private final SimpleStringProperty name;
+        private final SimpleStringProperty status;
+
+        private Alert(String name, String department) {
+            this.name = new SimpleStringProperty(name);
+            this.status = new SimpleStringProperty(department);
+        }
+
+        public String getName() {
+            return name.get();
+        }
+
+        public void setName(String fName) {
+            name.set(fName);
+        }
+
+        public String getStatus() {
+            return status.get();
+        }
+
+        public void setStatus(String fName) {
+            status.set(fName);
+        }
+    }
+
+    //public static void main(String[] args) {
+    // Application.launch(args);
+    //}
+    public static void showWindow( ) { launch(new String[] {}); }
+
+}