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Ugesedler/Ugeseddel-11-19-11-2025/src/StackPaneDemo.java

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+
+import javafx.application.Application;
+import javafx.collections.ObservableList;
+import javafx.event.ActionEvent;
+import javafx.event.EventHandler;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Node;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.CheckBox;
+import javafx.scene.control.Label;
+import javafx.scene.layout.StackPane;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage;
+ 
+public class StackPaneDemo extends Application {
+ 
+    private StackPane stackPane;
+ 
+    @Override
+    public void start(Stage primaryStage) throws Exception {
+ 
+        VBox root = new VBox();
+ 
+        // StackPane
+        stackPane = new StackPane();
+        
+        // add label to StackPane
+        Label label = new Label("I'm a Label");
+        label.setStyle("-fx-background-color:yellow");
+        label.setPadding(new Insets(5,5,5,5));   
+        stackPane.getChildren().add(label);
+        
+        // add Button to StackPane   
+        Button button = new Button("I'm a Button");       
+        button.setStyle("-fx-background-color: cyan");
+        button.setPadding(new Insets(5,5,5,5));
+        stackPane.getChildren().add(button);
+        
+        // add CheckBox to StackPane
+        CheckBox checkBox = new CheckBox("I'm a CheckBox");
+        checkBox.setOpacity(1);
+        checkBox.setStyle("-fx-background-color:olive");
+        checkBox.setPadding(new Insets(5,5,5,5));
+        stackPane.getChildren().add(checkBox);
+        
+        stackPane.setPrefSize(300, 150);
+        root.getChildren().add(stackPane);
+ 
+        Button controlButton = new Button("Change Top");
+ 
+        root.getChildren().add(controlButton);
+        root.setAlignment(Pos.CENTER);
+        VBox.setMargin(stackPane, new Insets(10, 10, 10, 10));
+        VBox.setMargin(controlButton, new Insets(10, 10, 10, 10));
+     
+        Scene scene = new Scene(root, 550, 250);
+        primaryStage.setTitle("StackPane Layout Demo");
+        primaryStage.setScene(scene);
+ 
+        controlButton.setOnAction(new EventHandler<ActionEvent>() {
+            @Override
+            public void handle(ActionEvent event) {
+                changeTop();
+            }
+        });
+ 
+        primaryStage.show();
+    }
+ 
+    private void changeTop() {
+        ObservableList children = this.stackPane.getChildren();
+ 
+        if (children.size() > 1) {
+            //
+            Node topNode = (Node) (children.get(children.size()-1));
+            topNode.toBack();
+        }
+    }
+ 
+    public static void main(String[] args) {
+        launch(args);
+    }
+ 
+}