GUI2 Flashcards
What is an event in JavaFX?
An event occurs when a user interacts with the application, such as clicking a button or moving the mouse.
What is the default style sheet for JavaFX applications?
The default style sheet is modena.css, located in the jfxrt.jar file.
How can you extract the modena.css file from the JAR file?
Use the command: jar xf jfxrt.jar com/sun/javafx/scene/control/skin/modena/modena.css
What does a style sheet in JavaFX control?
It controls the look of user interface elements.
True or False: JavaFX CSS is based on the W3C CSS version 2.1 specification.
True
List some layout panes provided by the JavaFX SDK.
- BorderPane
- HBox
- VBox
- StackPane
- GridPane
- FlowPane
- TilePane
- AnchorPane
What is an EventHandler in JavaFX?
An EventHandler contains application logic to process an event.
What are the two broad classifications of events in JavaFX?
- Foreground Events
- Background Events
What is the base class for an event in JavaFX?
The class named Event in the javafx.event package.
What type of event is represented by the class MouseEvent?
Mouse input events such as mouse clicked, mouse pressed, mouse released.
What does the KeyEvent class represent?
It indicates the key stroke occurred on a node.
Fill in the blank: The event handling mechanism in JavaFX controls the event and decides what should happen when an event occurs, and the code that is executed is known as an _______.
[event handler]
What are the phases of event handling in JavaFX?
- Route Construction
- Event Capturing Phase
- Event Bubbling Phase
Describe the Event Capturing Phase.
The event travels from the root node down to the target node, executing any registered filters.
Describe the Event Bubbling Phase.
The event travels from the target node back up to the root node, executing any registered handlers.
What is the purpose of the Scene in a JavaFX application?
It holds all the physical contents (nodes) of the application.
What is the structure of a JavaFX application?
It consists of three main components: Stage, Scene, and nodes.
What class must be imported to create a JavaFX application?
javafx.application.Application
What method must be overridden to start a JavaFX application?
The start() method.
What is the role of the Stage in a JavaFX application?
It acts as a container for all JavaFX objects.
True or False: The primary stage in a JavaFX application is created by the application itself.
False
What is FXML in JavaFX?
FXML is an XML vocabulary for defining and arranging JavaFX GUI controls without writing Java code.
What does JavaFX Scene Builder allow you to do?
Create GUIs by dragging and dropping GUI components.
Fill in the blank: JavaFX enables you to change the look-and-feel of your GUI using _______.
[Cascading Style Sheets (CSS)]
What is the primary purpose of creating style sheets in JavaFX?
To override the styles in the default style sheet and to add custom styles.
What is the first step in creating a JavaFX application?
Extend the Application class and override the start() method.
What happens when the show() method is called on the primary stage object?
It displays the primary stage.
What is the significance of the root node in the scene graph?
It acts as a parent node for all other nodes present in the scene graph.
What are leaf nodes in the context of a scene graph?
Nodes that exist at the lowest level in the tree hierarchy.
True or False: You need to know FXML or XML to study JavaFX.
False
