Java FX Part2


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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.

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Java FX Part2

  1. 1. Introduction of JavaFx Prem Chand Mali
  2. 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 : Facebook : LinkedIn: Twitter: Google+ : Contact Me : Email : / Skype: mfsi_premchandm
  3. 3. Agenda  Event Handling.  Property and Bindings  WebView and MediaPlayer  Shapes  Bind event on shapes  Q&A
  4. 4. Event Handling  What is an event ?  Event types  Event targets  Event delivery process
  5. 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. 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. 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. 8. Event delivery process • Event delivery process contains following four steps – Target Selection – Route construction – Event capturing – Event bublling
  9. 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 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. 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. 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. 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. 13. Media The 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. 14. Media Some of the features supported by the JavaFX media stack include the following  – – – – – – – –  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. 15. Media Media components – MediaView – A Node object to support animation, translucency, and effects
  16. 16. Shapes • JavaFx also provided capability to draw following shapes on scene. – Circle – Rectangle – Ellipse – Line – Polygon – etc
  17. 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. 18. Q&A