1. Java FX

2. Graphical Applications
Java apps having graphical components
Called GUI components
GUI component
An object representing a screen element
Some are containers used to hold other components

3. Java FX Java FX New framework for developing GUI-based apps
Replaces AWT and Swing
Enables the development of
RIA (Rich Internet Applications)
Web apps with features similar to those of desktop apps
Provides a multi-touch support
Has built-in
Animation, video and audio playback support

4. Anatomy of a JavaFX Application
Main building blocks
Stage
equivalent to “JFrame”
Scene
equivalent of “JPanel”
Nodes
equivalent to “GUI components of Swing and AWT”
Event handlers
Timelines and transitions for animation purposes

5. Panes, UI controls, and Shapes

6. Layout Management An object Several predefined managers
That determines the way components
Are arranged in a container
Several predefined managers
Are provided by Java FX
Layout managers are called Panes in Java-FX

7. Layout Panes

8. Flow Pane
Example:

9. Grid Pane
Example:

10. Border Pane
Example:

11. HBox
Example:

12. VBox
Example:

13. Event Handling Interfaces
GUI revolves around
Components
Events
Handlers
Event
Represents some activity to which
we may want to respond
May be generated by a graphical component
Event handler
Defines what happens when an event occurs

14. A corresponding listener
Events and Handlers
Event
Component
A component object
may generate an event
Handler
A corresponding listener
object is designed to
respond to the event
When the event occurs, the component calls
the appropriate method of the listener,
passing an object that describes the event

15. Event handlers in Java FX
A handler in JavaFX
Must satisfy the following requirements
It must implement the
EventHandler<T extends Event> interface
It must be registered with the event source

16. Events and Event sources

17. Events Details

18. Case Study1: Push Counter
Application
Displays a push button
Increments a counter each time the button is pushed

19. Case Study2: Control Circle
Application
Uses two buttons to
Control the size of a circle

20. Font
Font is defined by
Name, weight (bold), posture (italic/regular), and size

21. Color Opacity Defines the transparency of a color
With the range 0.0 (completely transparent) to 1.0 (opaque)

22. Drawing Text Text is created using the Text class
The latter is derived from the Shape super-class
In the “ScatteredText” Eclipse project
Text objects with
random colors and positions are scattered about a Scene area

23. Image and ImageView The Image class The ImageView is a node Example:
Represents a graphical image and
Use to load an image from a specified URL
The ImageView is a node
For displaying an image
Example:

24. Property binding A new concept introduced in JAVAFX, whereby
A target object is bound to a source object
Target object is called “binding property” and
Implements “Property” interface
The source object is called “Observable object” and
Implements “ObservableValue” interface
Binding properties are defined
for primitive data types and String
double/…/boolean => DoubleProperty/…/BooleanProperty
String => StringProperty

25. Common Properties and Methods for Nodes
Nodes share
Style and rotate properties
The style properties are similar to CSS
The style is defined with a prefix –fx-
Multiple style properties can be set together
Example: : circle.setStyle(“-fx-stroke:black; -fx-fill: red;”);
The rotate property
Specifies an angle in degrees for rotating the node
Example: button.setRotate(80);