JavaFX is a set of graphics and media packages that enables developers to design, create, test, debug, and deploy rich client applications that operate consistently across diverse platforms.This presentation covers event handling and new features of the JavaFx.

1. Introduction of JavaFx
Prem Chand Mali

2. About Me
SCJP/OCJP - Oracle Certified Java Programmer
MCP:70-480 - Specialist certification in HTML5
with JavaScript and CSS3 Exam
Skills : Java, Swings, Springs,
Hibernate, JavaFX, Jquery,
prototypeJS, ExtJS.
Connect Me :
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LinkedIn: http://www.linkedin.com/in/premmali
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Google+ : https://plus.google.com/106150245941317924019/about/p/pub
Contact Me :
Email : premchandm@mindfiresolutions.com / prem.c.mali@gmail.com
Skype: mfsi_premchandm

3. Agenda

Event Handling.

Property and Bindings

WebView and MediaPlayer

Shapes

Bind event on shapes

Q&A

4. Event Handling

What is an event ?

Event types

Event targets

Event delivery process

5. What is an event ?
Event is occurrence which happens in application with or
without participation of human.

JavaFx events are instance of javafx.event.Event or
subclass of Event.


Event has following three properties.
– Event type : Type of event
– Source : Origin of the event, source changes as the
event is passed along the chain.
Target: No on which the action occurred

6. Event Type

An event type is an instance of the EventType class.
Event.Any
WindowEvent.Any
ActionEvent.Action
InputEvent.Any
WindowEvent.Showing
KeyEvent.Any
WindowEvent.Shown
KeyEvent.Key_Pressed
MouseEvent.Mouse_Presse
d
KeyEvent.Key_Release
d
MouseEvent.Mouse_Released
KeyEvent.Any
MouseEvent.Any
...

7. Event Target
• Target can be instance of any class that implements
EventTarget interface.
• Implementation of buildEventDispatchChain creates the
event dispatch chain that the event must travel to reach
target.
• Window, scene, node classes implement the EventTarget
interface and subclasses of those classes inherit the
implementation.
• If custom control is not subclass from Window, Scene, or
Node then you need to implement EventTarget.

8. Event delivery process
• Event delivery process contains following four steps
– Target Selection
– Route construction
– Event capturing
– Event bublling

9. Properties and Binding
• JavaBeans component architecture to represent the
property of an object. JavaFx expended and improved it.
• JavaFX properties are often used in conjunction with
binding, a powerful mechanism for expressing direct
relationships between variables.
• Properties classes is part of javafx.beans.property
package.
• A binding observes its list of dependencies for changes,
and then updates itself automatically after a change has
been detected. It is following two types of API
– High Level
– Low Level

10. Properties and Binding

Fluent API
IntegerProperty num1 = new SimpleIntegerProperty(1);
IntegerProperty num2 = new SimpleIntegerProperty(2);
NumberBinding sum = num1.add(num2);
System.out.println(sum.getValue());
num1.set(2);
System.out.println(sum.getValue());

Binding class
NumberBinding sum = Bindings.add(num1,num2);

Both Approach
Bindings.add(num1.multiply(num2),num3.multiply(num4));

11. Properties and Buinding

Low Level API example
DoubleBinding db = new DoubleBinding() {
{
super.bind(a, b, c, d);
}
@Override
protected double computeValue() {
return (a.get() * b.get()) + (c.get() * d.get());
}
};

12. WebView
The WebView component is based on WebKit, an open
source web browser engine. It supports Cascading Style
Sheets (CSS), JavaScript, Document Object Model (DOM),
and HTML5.

It enables you to perform following tasks.
–
–
–
–
–
–
Render HTML content from local and remote URLs
Obtain Web history
Execute JavaScript commands
Perform upcalls from JavaScript to JavaFX
Manage web pop-up windows
Apply effects to the embedded browser

13. Media
The javafx.scene.media package enables developers to
create media applications that provide media playback in
the desktop window or within a web page on supported
platforms.

Currently supported formats.
– Audio: MP3; AIFF containing uncompressed PCM;
WAV containing uncompressed PCM; MPEG-4
multimedia container with Advanced Audio Coding
(AAC) audio
– Video: FLV containing VP6 video and MP3 audio;
MPEG-4 multimedia container with H.264/AVC
(Advanced Video Coding) video compression.

14. Media
Some of the features supported by the JavaFX media
stack include the following

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–
–
–
–
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
FLV container with MP3 and VP6
MP3 audio
MPEG-4 container with either AAC, H.264, or both
HTTP, FILE protocol support
Progressive download
Seeking
Buffer progress
Playback functions (Play, Pause, Stop, Volume,
Mute, Balance, Equalizer)
Media components
– Media – A media resource, containing information
about the media, such as its source, resolution, and
metadata.
– MediaPlayer – The key component providing the
controls for playing media.

15. Media
Media components
– MediaView – A Node object to support animation,
translucency, and effects

16. Shapes
• JavaFx also provided capability to draw following shapes
on scene.
– Circle
– Rectangle
– Ellipse
– Line
– Polygon
– etc

17. Events on Shapes
• JavaFx Shape API also provide capability to add event on
Shapes.
For example :
rect.setOnMouseClicked(new
EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
Color color = (((Color)
rect.getFill()).equals(Color.RED))
? Color.BROWN : Color.RED;
rect.setFill(color);
}
});

18. Q&A