Java FX 2.0 - A Developer's Guide

JavaFX 2.0 – A Java Developer's Guide

Stephen Chin Chief Agile Methodologist, GXS http://steveonjava.com @steveonjava

Peter Pilgrim Oracle Java Champion http://www.xenonique.co.uk/blog/ @peter_pilgrim

Meet the Presenters

Stephen Chin @steveonjava

Motorcyclist

Family Man

Peter Pilgrim @peter_pilgrim

Football, Music & Partner

This is a Participatory Session!

>  Every now and then we will say something interesting… and it will go out in a tweet.

>  Follow @steveonjava to watch the tweets and retweet the ones you like to your followers

>  Feel free to create your own tweets using the hash tags "#JavaFX #Devoxx"

>  We have some goodies for folks who play. J

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http://blogs.oracle.com/chrisoliver/entry/epitaph 4

At the end of the day, on the one hand we have computer systems, and on the other, people. Connecting them together, and allowing people to interact with computer systems in a compelling way, requires graphical user interfaces

Chris Oliver, Creator of F3

JavaFX 2.0 Platform

Immersive Desktop Experience Combining the Best of JavaFX and Web Technologies >  Leverage your Java skills with modern

JavaFX APIs

>  Integrate Java, JavaScript, and HTML5 in the same application

>  New graphics stack takes advantage of hardware acceleration for 2D and 3D applications

>  Integrate in Swing applications using JFXPanel

>  User your favorite IDE: NetBeans, Eclipse, IntelliJ, etc.

Demo Video Fracture

Headline News

>  RT @Stephan007: The #JavaOne11 channel on #Parleys passed 51.800 views! Most viewed: "Introduction to #JavaFX 2.0", close to 11,000 - @JavaFX4You, 9th November 2011

>  The most interesting announcement came when Oracle demoed both Java and JavaFX applications running on a Windows tablet, an iPad, and a "Linux-based tablet". - Eric Bruno, Dr Dobbs Journal, 5th October 2011

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Platform Support

>  Windows fully supported l  For 3D you need one of the supported graphics

cards (ATI, NVidia, Intel) >  Mac OS X preview available >  Linux Planned for end of 2012

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Windows OS Requirements

Operating System (32-Bit and 64-Bit) Browsers (32-Bit and 64-Bit) Windows XP Home and Professional with Service Pack 3

Internet Explorer 7 and 8 Chrome

Windows Vista Home Basic, Home Premium, Business, and Ultimate with Service Pack 2

Internet Explorer 7, 8, and 9 Firefox 3.5, 3.6, and 4 Chrome

Windows 7 Home Premium, Professional, and Ultimate

Internet Explorer 8 and 9 Firefox 3.5, 3.6, and 4 Chrome

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Supported Graphics Cards

Graphics Card Supported Graphics Processing Units (GPUs)

NVIDIA Mobile GPUs: GeForce 8M and 100M series or higher, NVS 2100M series or higher, and Mobility Quadro FX 300M series or higher Desktop GPUs: GeForce 8 and 100 series or higher Workstation GPUs: Quadro FX 300 series or higher

ATI Mobile GPUs: Mobility Radeon HD 3000, 4000, and 5000 series Desktop GPUs: Radeon HD 2400, 3000, 4000, 5000, and 6000 series

Intel Mobile GPUs: GMA 4500MHD and GMA HD Desktop GPUs: GMA 4500 and GMA HD

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Building JavaFX Applications

>  Deploys in the browser or on desktop >  Pure Java APIs >  Includes builders for declarative construction >  Alternative languages can also be used for

simpler UI creation l  GroovyFX l  ScalaFX l  Visage

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Hello Devoxx (Java Version)

public class HelloDevoxx extends Application { public static void main(String[] args) { launch(args); } @Override public void start(Stage primaryStage) { primaryStage.setTitle("Hello Devoxx"); Group root = new Group(); Scene scene = new Scene(root, 400, 250, Color.ALICEBLUE); Text text = new Text(); text.setX(105); text.setY(120); text.setFont(new Font(30)); text.setText("Hello Devoxx"); root.getChildren().add(text); primaryStage.setScene(scene); primaryStage.show(); } }

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19 Lines 425 Characters

Hello Devoxx (Builder Version)

public void start(Stage primaryStage) { primaryStage.setTitle("Hello Devoxx"); primaryStage.setScene(SceneBuilder.create() .width(400) .height(250) .fill(Color.ALICEBLUE) .root( GroupBuilder.create().children( TextBuilder.create() .x(105) .y(120) .text("Hello Devoxx") .font(new Font(30)) .build() ).build() ) .build()); primaryStage.show(); }

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Hello Devoxx (GroovyFX Version)

GroovyFX.start { primaryStage -‐> def sg = new SceneGraphBuilder() sg.stage( title: 'Hello Devoxx', show: true) { scene( fill: aliceblue, width: 400, height: 250) { text( x: 105, y: 120, text: "Hello Devoxx" font: "30pt") } } }

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Hello Devoxx (ScalaFX Version)

object HelloDevoxx extends JFXApp { stage = new Stage { title = "Hello Devoxx" width = 400 height = 250 scene = new Scene { fill = BLUE Text { x = 105 y = 120 text = "Hello Devoxx" font = Font(size: 30) } } } }

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Hello Devoxx (Visage Version)

Stage { title: "Hello Devoxx" width: 400 height: 250 scene: Scene { fill: BLUE content: Text { x: 105 y: 120 text: "Hello Devoxx" font: Font {size: 30pt} } } }

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Architecture of JavaFX 2.0

Java Virtual Machine

Java2D Open GL D3D

Prism Glass WinTk

Media Engine

Web Engine

JavaFX Public API

Quantum Toolkit

Properties, Lists, Binding 18

JavaFX 2.0 Fundamentals

JavaFX 2.0 Properties

>  Primitive Properties >  Object Properties >  FX List Collection Properties

>  Properties are:

l  Observable l  Lazy l  Type Safe

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Properties in Java

public class Person { private StringProperty firstName; public void setFirstName(String val) { firstNameProperty().set(val); } public String getFirstName() { return firstNameProperty().get(); } public StringProperty firstNameProperty() { if (firstName == null) firstName = new SimpleStringProperty(this, "firstName"); return firstName; } }

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Property Declaration

Properties in Java


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Setter Method (Convenience)

Properties in Java


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Getter Method (Convenience)

Properties in Java


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Property Fetcher (Lazy Construction)

Properties in Java

public class Person { private StringProperty firstName; public void setFirstName(String val) { firstNameProperty().set(val); } public String getFirstName() { return firstName == null ? null : firstNameProperty().get(); } public StringProperty firstNameProperty() { if (firstName == null) firstName = new SimpleStringProperty(this, "firstName"); return firstName; } }

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Even Lazier…

Properties in Java

public class Person { private StringProperty firstName; public void setFirstName(String val) { firstNameProperty().set(val); } public String getFirstName() { return firstName == null ? "Peter" : firstNameProperty().get(); } public StringProperty firstNameProperty() { if (firstName == null) firstName = new SimpleStringProperty(this, "firstName", "Peter"); return firstName; } }

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With initial value

Undirectional, Bidirectional and Lazy binding in Java

Demo Properties

Listeners

>  Change Listener l  Observable, old value, new value

>  Invalidation Listeners l  Observable

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Property Listener Example

IntegerProperty temperature = new SimpleIntegerProperty(0); temperature.setOnChangeListener( new ChangeListener<Number>() { public void change( ObservableValue<? Extends Number> ov, Number newValue, Number oldValue) System.out.printf(“%f %f %f”, ov.doubleValue(), oldValue.doubleValue(), newValue.doubleValue() } ); temperature.set(2); temperature.set(4);

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Hey Ho! This is all just to say:

var temperature: Integer = 23 on replace oldValue { println("temperature={temperature}, oldValue={oldValue}"); } // Visage (previously JavaFX Script)

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JavaFX 2.0 Observable Lists

>  Extends java.util.List >  Includes addListener/removeListener

>  For bulk operations use: l  addAll l  removeAll l  setAll

>  Sort with l  FXCollections.sort()

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List Change Listener

list.addListener(new ListChangeListener<Item>() { public void onChanged(Change<Item> c) { while (c.next()) { if (c.wasPermutated()) { for (int i = c.getFrom(); i < c.getTo(); i++) { int newLoc = getPermutation(i); // handle move (a.k.a. sort) } } else { for (Item removed : c.getRemoved()) { // handle removal } for (Item added : c.getAddedSubList()) { // handle addition } }}}});

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JavaFX 2.0 Observable Maps

>  Extends java.util.Map >  Includes addListener() / removeListener()

>  MapChangeListener l  Supports add() / remove() l  Can get associated:

l  Key l  Old Value l  New Value

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Binding in JavaFX 2.0

>  One of the most important features of JavaFX 1.3 and prior

>  Now supported via an API (that works with Observable Properties)

>  Can handle most cases quite elegantly and with full type safety

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Binding in JavaFX 2.0

Infix Addition/Subtraction/Multiplication/Division:

heightProperty().bind(rect1.heightProperty().add(rect2.heightProperty()));

Aggregate Operators:

widthProperty().bind(Bindings.max(rect1.widthProperty(), rect2.widthProperty(), rect3.widthProperty()));

Conditional Expressions:

strokeWidthProperty().bind(Bindings.when(hover).then(4).otherwise(0));

Bidirectional Binding:

heightProperty().bindBidirectional(rect1.heightProperty());

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Life is like a bowl of cherries

Demo Image Fracture

“The Scene-graph is King.”

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Image

Image View 1

Image View 2

Image View 3

Image View 4

Image View Node

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Media Player

Media View 1

Media View 2

Media View 3

Media View 4

Media

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Breaking Glass

1.  Divide a bounded area into four triangles 2.  Are we there yet? 3.  For each triangle

A.  Choose a random side and split it to two rectangles

B.  Recursive descend the two triangles (step 2)

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Controls

10 / 10 Break

Button Control

>  Simple Button Control >  Add and remove click event handler >  Support Cascading Style Sheets

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Button Code

public class ButtonDemo extends AbstractDevoxxApplication { public void initialiseScene(Group root) { VBox vbox = VBoxBuilder.create(). spacing(25).layoutX(25).layoutY(25).build(); root.getChildren().add(vbox); Button red = ButtonBuilder.create() .text("Red").style("-‐fx-‐base: red;").build(); Button yellow = ButtonBuilder.create() .text("Yellow").style("-‐fx-‐base: blue;") .build(); Button green = ButtonBuilder.create() .text("Green").style("-‐fx-‐base: green;") .build(); vbox.getChildren().addAll(red,yellow,green); } /* … */ }

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TextField Control

>  One line entry text field control >  Set OnAction event handler >  Can listen to individual key events >  Support Cascading Style Sheets

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TextField Demo

public class TextDemo extends AbstractDevoxxApplication { public void initialiseScene(Group root) { VBox vbox = VBoxBuilder.create().spacing(25) .layoutX(25).layoutY(25).build(); root.getChildren().add(vbox); TextField red = TextFieldBuilder.create() .text("Red Devoxx") .style("-‐fx-‐base: red; -‐fx-‐font-‐size: 48pt; ") .build(); TextField green = TextFieldBuilder.create() .text("Green Devoxx") .style("-‐fx-‐base: green; -‐fx-‐font-‐size: 24pt; ") .build(); vbox.getChildren().addAll(red,green); } /*…. */ }

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ListView Control

>  Displays a list of items >  Reuses cells for performance >  Default cell renderer can

display Strings >  For other object types

l  Create custom CellFactory

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ListView Code

public void initialiseScene(Group root) { VBox vbox = VBoxBuilder.create()

.spacing(25).layoutX(25).layoutY(25).build(); root.getChildren().add(vbox); final ListView<String> listView =

new ListView<String>(); listView.setItems(FXCollections.observableArrayList( "Manchester City", "Manchester United", "Newcastle United", "Chelsea", "Tottenham Hotspur", "Liverpool", /* … */ ));

listView.getSelectionModel() .setSelectionMode(SelectionMode.MULTIPLE); vbox.getChildren().addAll(listView); } /*…*/ }

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TreeView Control

>  Displays a tree view of items >  Can dynamically populate as

tree is expanded >  Default cell renderer can

display Strings >  For other object types

l  Create custom CellFactory

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TreeView Code

public void initialiseScene(Group root) { /*…*/ TreeView treeView = TreeViewBuilder.<String>create().root( TreeItemBuilder.<String>create().value("JVM Languages").children( TreeItemBuilder.<String>create().value("Static").children( new TreeItem<String>("Scala"), new TreeItem<String>("Java"), new TreeItem<String>("Visage"), /*…*/ ).build(), TreeItemBuilder.<String>create().value("Dynamic").children( new TreeItem<String>("Clojure"), new TreeItem<String>("Groovy"), /*…*/ ).build(), /*…*/ ).build() ).build(); /*…*/ } 48

ToolBar Demo

>  Toolbar displays items horizontally or vertically >  Handles arbitrary number of items >  Can add any node to the toolbar, including

custom nodes >  Automatic adds an overflow hint if cannot display

all toolbar items

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Toolbar Code

public class ToolBarDemo extends AbstractDevoxxApplication { public void initialiseScene(Group root) { /*…*/ ToggleGroup amFm = new ToggleGroup(); ToolBar toolBar = ToolBarBuilder.create().items( new Label("Volume"), new Slider(), new ToggleButton("Loudness"), RadioButtonBuilder.create() .text("AM").toggleGroup(amFm).build(), RadioButtonBuilder.create() .text("FM").toggleGroup(amFm).build(), new Button("Tune") ).build(); vbox.getChildren().addAll(toolBar); }}

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Progress Bars and Indicators

>  Progress Bars can be laid out vertically and horizontally

>  Progress Indicator is a circular widget

>  Progress Bar and Indicator can be indefinite

>  Double property 0.0 <= x <= 1.0

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Progress Bar/Indicator Code

VBoxBuilder.create().spacing(10) .alignment(Pos.CENTER).children( new ProgressBar(), new ProgressBar(.25), new ProgressIndicator(.75) ).build()

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Accordion Control

>  Accordion is a space saving components

>  Accordian accept only TitledPanes

>  Each TitledPane managed one scenegraph node

>  Can choose the titled pane expanded by default

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Accordion Code

String imageUrl = new Image(ResizableImageViewDemo.class. getResource("images/Squirrel.jpg").toExternalForm(); Accordion accordion = AccordionBuilder.create().panes( new TitledPane("Button", new Button("Regular")), new TitledPane("ToggleButton", new ToggleButton("Toggle")), imagePane = new TitledPane("SquirrelImage", ImageViewBuilder.create().image(imageUrl, 500, 500, true, true, false) ).build() ) ).build()

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TabPane Control

>  Alternative space saving component >  Choose a side for the Tab >  Each manages one component node >  Tab pane has two modes:

l  floating l  recessed

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TabPane Code

Accordion accordion; TitledPane imagePane; TabPane tabPane = TabPaneBuilder.create().tabs( TabBuilder.create().text("Progress").content( /* Progress Tab Here */ ).build(), TabBuilder.create().text("Accordion").content( /* Accordion Tab Here */ ).build() ).build(); accordion.setExpandedPane(imagePane); vbox.getChildren().addAll(tabPane);

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JavaFX Components

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Pens, papers and inks, first!

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A component is an encapsulation that binds a set of nodes with the operations that act on those nodes

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Component Types

>  Non-Resizable l  javafx.scene.shape.Shape l  javafx.scene.Group

>  Resizable l  javafx.scene.layout.Pane l  javafx.scene.layout.Region l  javafx.scene.layout.Control

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Group based

>  Particularly using the JavaFX primitive nodes under javafx.scene.shape.*;

>  Design is not meant to be resized >  Layout is fixed at construction / initialisation time

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Region based

>  Region is the sub class of javafx.scene.Parent >  Adds the ability to resize a node, layout a

particular set of children

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Control based

>  Allows particular subclass of Region that permits skinning of node with a stylesheet

>  You need 3 classes l  The Control java.scene.control.Control

l  The Skinnable java.scene.control.Skinnable

l  The Behaviour com.sun.javafx.scene.control.BehaviorBase

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Control based contd

>  See JFXtras.org for more examples of skinnable components written for JavaFX 2.0

>  Define CSS file referencing a Skin class >  A Skin is a Region (JavaFX 2.0) com.sun.javafx.scene.control.BehaviorBase com.sun.javafx.scene.control.SkinBase

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Skins are StackPanes

>  SkinBase is a type of StackPane >  A StackPane is a Region >  Idea of shuffling a deck of cards and only showing

one

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Layout Children Method

void layoutChildren()

>  Layout all of the children of a Region based component

>  Compute the preferred width and height of the children (first)

>  May cache those values internally as part of the component or use Constraints

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Layout Boundaries

>  SDK will make a request to find the best width and height for your component.

>  Your component must do the same for its children >  Implement at least computePrefWidth and

computePrefHeight methods!

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Layout Methods

protected double computePrefHeight(double w) { return child.prefHeight(w) + 2 *ht; } protected double computePrefWidth(double h) { return child.prefWidth(h) + 2 * wt; }

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Pedantic Complete

Implement the other four methods too >  computeMinWidth(v) >  computeMinHeight(v) >  computeMaxWidth(v) >  computeMaxHeight(v)

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Demo Custom Border Layout

Writing JavaFX Containers

Event Input on Node

>  Mouse Events fall under the pointer iteraction (single) l  Clicked, Entered, Exited, Pressed, Dragged,

Released, Wheel l  Target Entered, Target Exited

>  Key Events l  Clicked, Pressed, Released

Event Input on Node

>  It is possible to consume an event and stop it bubbling further down the scene-graph hierarchy

>  You can block a component from event interaction >  Using clever tricks (opaque shape) you can

implement dialog / focus / modal behaviour

Layout Secrets

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Reuse SDK Methods

Some SDK Methods

>  Region#layoutInArea() >  Region#positionInArea() >  Node#resize() >  Node#resizeRelocate()

>  AnchorPane >  BorderPane >  VBox/HBox >  FlowPane >  StackPane >  TilePane >  GridPane

Built-in Layouts


Built-in Layouts


Built-in Layouts


Built-in Layouts


Built-in Layouts

A B

D E

C


Built-in Layouts


Built-in Layouts


Built-in Layouts

Demo Box Container Pane

Tips

>  When Dragging a Node prefer to translate (X,Y) >  When Laying Out a Node prefer to set the position

with layoutX, layoutY >  Given steady state conditions you can swap

layout (X,Y) for translation (X,Y)

Tips 2

>  Use blocking boolean flags to prevent conflict when you animating children in a container

>  If you are unsure about MT concurrency you can always use AtomicBoolean

>  Prefer JavaFX Properties

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Displaying HTML in JavaFX

Displaying HTML in JavaFX

public class WebViewDemo extends Application { public static void main(String[] args) { launch(args); } @Override public void start(Stage stage) { WebView webView = new WebView(); webView.getEngine().load("http://devoxx.com"); Scene scene = new Scene(webView); stage.setScene(scene); stage.setTitle("Web View Demo"); stage.show(); }}

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For more info on Web/HTML5…

Moving to the Client – JavaFX and HTML5 Stephen Chin Kevin Nilson Thursday 10:50 AM, Room 7

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10 / 10 Break

JavaFX With Groovy

Features of Groovy

>  Modern language l  Closures l  AST Transforms l  Strongly typed dynamic language

>  Tight integration with Java l  Very easy to port from Java to Groovy

>  Declarative syntax with GroovyFX Builders l  Familiar to Groovy and JavaFX Script developers

Java vs. GroovyFX DSL

public class HelloStage extends Application { public void start(Stage stage) { stage.setTitle("Hello Stage"); stage.setWidth(600); stage.setHeight(450); Scene scene = new Scene(); scene.setFill(Color.LIGHTGREEN); Rectangle rect = new Rectangle(); rect.setX(25); rect.setY(40); rect.setWidth(100); rect.setHeight(50); rect.setFill(Color.RED); scene.setRoot(new Group(rect)); stage.setScene(scene); stage.show(); } public static void main(String[] args) { launch(HelloStage.class, args); } }

GroovyFX.start { stage -‐> def sg = new SceneGraphBuilder(stage) sg.stage(title: “Hello Stage”, width: 600,

height: 450) { scene(fill: groovyblue) { rectangle(x: 25, y: 40, width: 100,

height: 50, fill: red) } } }

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Disappearing Circles in Groovy

def sg = new SceneGraphBuilder() def hc = { hover -‐> hover ? 4 : 0 } sg.stage(title: 'Vanishing Circles', show: true) { scene(fill: black, width: 800, height: 600) { 50.times { circle(centerX: rand(800), centerY: rand(600), radius: 150, stroke: white, strokeWidth: bind('hover', converter: hc)) { fill rgb(rand(255), rand(255), rand(255), 0.2) effect boxBlur(width: 10, height: 10, iterations: 3) } } } }

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Builder for GroovyFX scene graphs



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Declarative Stage definition



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Inline property definitions



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Bind to properties



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Sequence Creation Via Loop

Properties in Java

public class Person {! private StringProperty firstName;! public void setFirstName(String val) { firstNameProperty().set(val); }! public String getFirstName() { return firstNameProperty().get(); }! public StringProperty firstNameProperty() { ! if (firstName == null) ! firstName = new SimpleStringProperty(this, "firstName");! return firstName; ! }! ! private StringProperty lastName;! public void setLastName(String value)

{ lastNameProperty().set(value); }! public String getLastName() { return lastNameProperty().get(); }! public StringProperty lastNameProperty() { ! if (lastName == null) // etc.! } !}!

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Properties in GroovyFX

public class Person {! @FXBindable String firstName; ! @FXBindable String lastName;!}!

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public class Person {! @FXBindable String firstName; ! @FXBindable String lastName = “Smith”;!}!

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Optional initializers


public class Person {! @FXBindable String firstName; ! @FXBindable String lastName = “Smith”;!}!!def p = new Person()!def last = p.lastName!p.firstName = “Agent”!!

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Get and set values


public class Person {! @FXBindable String firstName; ! @FXBindable String lastName = “Smith”;!}!!def p = new Person()!def last = p.lastName!p.firstName = “Agent”!!textField(text: bind(p.lastNameProperty()))!!

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Access underlying property for binding

Binding in GroovyFX

@FXBindable class Time { Integer hours Integer minutes Integer seconds Double hourAngle Double minuteAngle Double secondAngle public Time() { // bind the angle properties to the clock time hourAngleProperty().bind((hoursProperty() * 30.0) +

(minutesProperty() * 0.5)) minuteAngleProperty().bind(minutesProperty() * 6.0) secondAngleProperty().bind(secondsProperty() * 6.0) } }

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Animation in GroovyFX

timeline(cycleCount: Timeline.INDEFINITE, autoReverse: true) {

at (1000.ms) { change(rect1, 'x') to 200 tween ease_both change rect2.yProperty() to 200 tween linear } }.play()

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Easy animation syntax: at (duration) {keyframes}



at (1000.ms) { change(rect1, 'x') to 200 change rect2.yProperty() to 200 } }.play()

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Key frame DSL




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Optional easing

Event Listeners in GroovyFX

>  Supported using the built-in Closure syntax >  Optional arguments for event objects

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onMouseClicked { e -‐> timeline { at(3.s) { change e.source.radiusProperty() to 0 }

}.play() }


Supported using the built-‐in Closure syntax Optional arguments for event objects

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Compact syntax {body}

onMouseClicked { MouseEvent e -‐> timeline { at(3.s) { change e.source.radiusProperty() to 0 }

}.play() }


Supported using the built-‐in Closure syntax Optional arguments for event objects

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Optional event parameter {event -> body}

onMouseClicked { MouseEvent e -‐> timeline { at(3.s) { change e.source.radiusProperty() to 0 }

}.play() }

TableView in Java

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ObservableList<Person> items = ... TableView<Person> tableView = new TableView<Person>(items); TableColumn<Person,String> firstNameCol = new TableColumn<Person,String>("First Name"); firstNameCol.setCellValueFactory( new Callback<CellDataFeatures<Person, String>, ObservableValue<String>>() { public ObservableValue<String> call(CellDataFeatures<Person, String> p) { return p.getValue().firstNameProperty(); } }); tableView.getColumns().add(firstNameCol);

TableView in GroovyFX

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def dateFormat = new SimpleDateFormat("yyyy-‐MM-‐dd"); tableView(items: persons) { tableColumn(property: "name", text: "Name", prefWidth: 150) tableColumn(property: "age", text: "Age", prefWidth: 50) tableColumn(property: "gender", text: "Gender", prefWidth: 150) tableColumn(property: "dob", text: "Birth", prefWidth: 150, type: Date, converter: { from -‐> return dateFormat.format(from) }) }

Layout in Java

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TextField urlField = new TextField(“h_p://www.google.com”); HBox.setHgrow(urlField, Priority.ALWAYS); HBox hbox = new HBox(); hbox.getChildren().add(urlField); WebView webView = new WebView(); VBox.setVgrow(webView, Priority.ALWAYS); VBox vbox = new VBox(); vbox.getChildren().addAll(hbox, webView);

Layout in GroovyFX

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sg.stage(title: "GroovyFX WebView Demo", show: true) { scene(fill: groovyblue, width: 1024, height: 800) { vbox { hbox(padding: 10, spacing: 5) { textField(“http://www.yahoo.com”, hgrow: "always") button("Go”) } webView(vgrow: "always") } } }

Layout in GroovyFX

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Layout in GroovyFX

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gridPane(hgap: 5, vgap: 10, padding: 25) {! columnConstraints(minWidth: 50, halignment: "right")! columnConstraints(prefWidth: 250)! label("Send Us Your Feedback", font: "24pt sanserif", ! row: 0, columnSpan: GridPane.REMAINING, halignment: "center",! margin: [0, 0, 10])!! label("Name: ", row: 1, column: 0)! textField(promptText: "Your name", row: 1, column: 1, hgrow: 'always')!! label("Email:", row: 2, column: 0)! textField(promptText: "Your email", row: 2, column: 1, hgrow: 'always')!! label("Message:", row: 3, column: 0, valignment: "baseline")! textArea(row: 3, column: 1, hgrow: "always", vgrow: "always")!! button("Send Message", row: 4, column: 1, halignment: "right")!}!

Layout in GroovyFX

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GroovyFX Supports…

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GroovyFX Supports…

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JavaFX With Scala

What is Scala

>  Started in 2001 by Martin Odersky >  Compiles to Java bytecodes >  Pure object-oriented language >  Also a functional programming language

2001 •  Scala Started

2003/2004 •  Scala v1.0

2006 •  Scala v2.0

2011 •  Scala 2.9.0 (latest)

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Why Scala?

>  Shares many language features with JavaFX Script that make GUI programming easier: l  Static Type Checking – Catch your errors at compile

time l  Closures – Wrap behavior and pass it by reference l  Declarative – Express the UI by describing what it

should look like

>  Scala also supports Type Safe DSLs! l  Implicit Conversions – type safe class extension l  Operator Overloading – with standard precedence rules l  DelayedInit / @specialized – advanced language

features

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Java vs. Scala DSL

public class HelloStage extends Application { public void start(Stage stage) { stage.setTitle("Hello Stage"); stage.setWidth(600); stage.setHeight(450); Scene scene = new Scene(); scene.setFill(Color.LIGHTGREEN); Rectangle rect = new Rectangle(); rect.setX(25); rect.setY(40); rect.setWidth(100); rect.setHeight(50); rect.setFill(Color.RED); scene.setRoot(new Group(rect)); stage.setScene(scene); stage.show(); } public static void main(String[] args) { launch(HelloStage.class, args); } }

object HelloJavaFX extends JFXApp { stage = new Stage { title = "Hello Stage" width = 600 height = 450 scene = new Scene { fill = LIGHTGREEN content = Seq(new Rectangle { x = 25 y = 40 width = 100 height = 50 fill = RED }) } } }

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Disappearing Circles in ScalaFX

object DisappearingCircles extends JFXApp { stage = new Stage { title = "Disappearing Circles" width = 800 height = 600 scene = new Scene { fill = BLACK content = for (i <-‐ 0 until 50) yield new Circle { centerX = random * 800 centerY = random * 600 radius = 150 fill = color(random, random, random, 0.2) effect = new BoxBlur(10, 10, 3) } } } }



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Base class for JavaFX applications



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Declarative Stage definition



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Inline property definitions



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Sequence Creation Via Loop

Binding in Scala

Infix Addition/Subtraction/Multiplication/Division:

height <== rect1.height + rect2.height Aggregate Operators:

width <== max(rect1.width, rect2.width, rect3.width) Conditional Expressions:

strokeWidth <== when (hover) then 4 otherwise 0 Compound Expressions:

text <== when (rect.hover || circle.hover && !disabled) then textField.text + " is enabled" otherwise "disabled"

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Animation in Scala

val timeline = new Timeline { cycleCount = INDEFINITE autoReverse = true keyFrames = for (circle <-‐ circles) yield at (40 s) { Set( circle.centerX -‐> random * stage.width, circle.centerY -‐> random * stage.height ) } } timeline.play();

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Animation in Scala


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JavaFX Script-like animation syntax: at (duration) {keyframes}

Animation in Scala


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Operator overloading for animation syntax

Animation in Scala

val timeline = new Timeline { cycleCount = INDEFINITE autoReverse = true keyFrames = for (circle <-‐ circles) yield at (40 s) { Set( circle.centerX -‐> random * stage.width tween EASE_BOTH, circle.centerY -‐> random * stage.height tween EASE_IN ) } } timeline.play();

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Optional tween syntax

Event Listeners in Scala

>  Supported using the built-in Closure syntax >  Optional arguments for event objects >  100% type-safe

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onMouseClicked = { Timeline(at(3 s){radius-‐>0}).play() }


Supported using the built-‐in Closure syntax Optional arguments for event objects 100% type-‐safe

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Compact syntax {body}

onMouseClicked = { Timeline(at(3 s){radius-‐>0}).play() }


Supported using the built-‐in Closure syntax Optional arguments for event objects 100% type-‐safe

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Optional event parameter {(event) => body}

onMouseClicked = { (e: MouseEvent) => Timeline(at(3 s){radius-‐>0}).play() }

About Project Visage

>  Visage project goals: l  Compile to JavaFX Java APIs l  Evolve the Language (Annotations, Maps, etc.) l  Support Other Toolkits

>  Come join the team! >  For more info: http://visage-lang.org/

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>  “Visage is a domain specific language (DSL) designed for the express purpose of writing user interfaces.”

How about JavaFX on… Visage

Stage { title: "Hello Stage" width: 600 height: 450 scene: Scene { fill: Color.LIGHTGREEN content: Rectangle { x: 25 y: 40 width: 100 height: 50 fill: Color.RED } } }

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Stage { title: "Hello Stage" width: 600 height: 450 scene: Scene { fill: Color.LIGHTGREEN content: Rectangle { x: 25 y: 40 width: 100 height: 50 fill: Color.RED } } }

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Stage { title: "Hello Stage" width: 600 height: 450 Scene { fill: Color.LIGHTGREEN Rectangle { x: 25 y: 40 width: 100 height: 50 fill: Color.RED } } }

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Visage is JavaFX Script++

>  Default Parameters >  New Literal Syntax For:

l  Angles – 35deg, 4rad, 1turn l  Colors – #DDCCBB, #AA33AA|CC l  Lengths – 5px, 2pt, 3in, 4sp

>  Null-check Dereference l  var width = rect!.width

>  Built-in Bindable Maps (coming soon!) l  var fruitMap = ["red" : apple, "yellow" : banana] l  var fruit = bind fruitMap["red"]

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Visage and JavaFX 2.0 are made for each other…

>  Enhanced Binding l  Retains lazy evaluation properties with additional

expressive power >  Integrated Collections

l  Sequences and Maps automatically convert between JavaFX Observable Lists/Maps

>  Built-in Animation Syntax l  Ties into JavaFX animation subsystem l  Provides consistent, clean APIs

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Conclusion

>  You can write JavaFX applications in pure Java

>  JavaFX is also usable in alternate languages

>  You can get improved support using DSL libraries l  GroovyFX l  ScalaFX

>  Or a dedicated UI JVM Language l  Visage

Pro JavaFX 2 Platform Coming Soon!

>  Coming 1st Quarter 2012 >  All examples rewritten in

Java >  Covers the new JavaFX 2.0

APIs >  Will includes ScalaFX,

GroovyFX, and Visage

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Professional Services

[email protected] JavaFX 2.0 in Enterprises Financial Services in London Training with Consultancy Technical Leadership

JavaFX 2.0 – A Java Developer's Guide

Stephen Chin Chief Agile Methodologist, GXS http://steveonjava.com @steveonjava

Peter Pilgrim Oracle Java Champion http://www.xenonique.co.uk/blog/ @peter_pilgrim

Thank You

Attributions

All images are Creative Commons (CC) License from Flickr.com – “You must attribute the source and you cannot change the content” Tim Ellis http://www.flickr.com/photos/tim_ellis/ Lego Basics http://www.flickr.com/photos/tim_ellis/338755101/sizes/l/ *PaysImaginaire* http://www.flickr.com/photos/nevrlndtink/ Variable Plastic Bag http://www.flickr.com/photos/nevrlndtink/232906118/sizes/m/ ~Deiby http://www.flickr.com/photos/deiby/ Expression http://www.flickr.com/photos/deiby/5489382677/sizes/l/ Lisa Sinclair http://www.flickr.com/photos/plumandjello/ fruit http://www.flickr.com/photos/plumandjello/2333263539/sizes/l/ Nerovivo http://www.flickr.com/photos/dominik99/ http://www.flickr.com/photos/dominik99/407716865/sizes/z/in/photostream/

Attributions

All images are Creative Commons (CC) License from Flickr.com – “You must attribute the source and you cannot change the content” .Guilty http://www.flickr.com/photos/roll_initiative/ Arbitrary Function Generator http://www.flickr.com/photos/roll_initiative/3278642272/ Loop Oh Rupert Grazer http://www.flickr.com/photos/loop_oh/ Pattern at the Senckenberg Museum in Frankfurt am Main / Germany. http://www.flickr.com/photos/loop_oh/4571485915/ Lili Vieira de Carvalho, Vancouver, Canada http://www.flickr.com/people/lilivc/ Composition of Bowls http://www.flickr.com/photos/lilivc/367582911/sizes/l/ Mykl Roventine http://www.flickr.com/people/myklroventine/ 19/365 Game Over http://www.flickr.com/photos/myklroventine/3210068573/sizes/l/ superciliousness / Bentley Smith http://www.flickr.com/people/superciliousness/ 200510 carpenter's tools - inside the workman's shed - all his old tools

http://www.flickr.com/photos/superciliousness/57486288/

Attributions

All images are Creative Commons (CC) License from Flickr.com – “You must attribute the source and you cannot change the content” You’ve got a fast car http://www.flickr.com/photos/coreforce/5910961411/ Core Force http://www.flickr.com/photos/coreforce/ GAME AT MARBLES http://www.flickr.com/photos/9619972@N08/928099769/sizes/l/in/photostream/ (Author unknown, from an antique children's boo Lucs Game http://www.flickr.com/photos/9619972@N08/928099769/ just.Luc http://www.flickr.com/people/9619972@N08/ DIY Easel http://www.flickr.com/photos/68888883@N00/2744696593/in/photostream/ Judy of the Woods http://www.flickr.com/people/68888883@N00/

Technology

Java FX 2.0 - A Developer's Guide