JavaOne 2011 Progressive JavaFX 2.0 Custom Components
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Peter Pilgrim Oracle Java Champion 10/15/2011 XeNoNiQUe.co.uk (c) 2011 1
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Transcript of JavaOne 2011 Progressive JavaFX 2.0 Custom Components
Peter Pilgrim Oracle Java Champion
10/15/2011 XeNoNiQUe.co.uk (c) 2011 1
10/15/2011 XeNoNiQUe.co.uk (c) 2011 2
Blog: www.XeNoNiQUe.co.uk/blog/
Industry: Financial Services, London, UK
Education: London South Bank University
Languages: Scala, Java, Groovy, Clojure
Conferences: JavaOne, ACCU, QCon, Devoxx
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“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
http://blogs.oracle.com/chrisoliver/entry/epitaph
Headline News
“Something that no one has mentioned and surprises me very much is that JavaFX 2.0 will only be supported on Windows...” - Max Katz, March 2011
“The major difference in the new version is that it provides Java APIs for JavaFX, allowing you to use JavaFX from within your normal Java applications” - James Sugrue, JavaLobby, May 2011
“You can write Pivot applications in Java or any other JVM language (you are not limited to JavaFX Script). ” – Greg Brown, Apache Pivot, Mailing List, Sept 2010
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Demo
The Plan
What is a component?
What types of component?
How does binding work?
Design Adaptive Process
Future Work
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JavaFX
2.0
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The Basics
The Scene-graph is King.
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Customers want applications
that work like today’s popular
mobile devices.
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JavaFX forms, controls and
layouts provide reinvestment .
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The Java platform is proven
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We know how to make Java
run fast and it will get faster.
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Demo
How much work must we do
to reinvigorate a platform?
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Java Virtual Machine is the
crown jewels
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JavaFX is written in Java,
Java runs on the JVM
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Every Node …
Every Node can have a clip node
Effectively generate a bitmap mask
Easy to create a “PortHole” widget
Invert the selection of the clip node, you
can create a “Punch” out widget
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Media
Image View
1
Image View
2
Image View
3
Image View
4
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Media Player
Media View
1
Media View
2
Media View
3
Media View
4
Media
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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Express Yourself
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JavaFX Properties.
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Properties
Primitive Properties
Object Properties
FX List Collection Properties
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Listeners
Change Listener
Observable, old value, new value
Invalidation Listeners
Observable
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Property Listener Example
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Properties of Component
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Code Generate JavaFX
Properties
e.g. Groovy
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Hey Ho! This is all just to say:
var temparature: Integer = 23 on replace oldValue {
println(“temperature={temperarture},
oldValue={oldValue}”
}
// JavaFX Script 1.3
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JavaFX
Components
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A pad, a paper and a pen,
first!
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A JavaFX component is an
encapsulation that binds a
particular tree set of nodes with
the operations that act on those
nodes
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Component Types
Non-Resizable
javafx.scene.shape.Shape
javafx.scene.Group
Resizable
javafx.scene.layout.Pane
javafx.scene.layout.Region
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
The Control
java.scene.control.Control type
The Skinnable
java.scene.control.Skinnable
The Behaviour
com.sun.javafx.scene.control.BehaviorBase
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Control based
Allows particular subclass of Region that permits skinning of node with a stylesheet
Control is a direct type of Parent
You need 3 classes The Control
java.scene.control.Control type
The Skin
java.scene.control.Skin
java.scene.control.Skinnable
The Behaviour
com.sun.javafx.scene.control.Behavior
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Control based contd
See JFXtras.org for more examples of
skinnable components written for
JavaFX 2.0 beta 45
A Skin can be a Region (?)
com.sun.javafx.scene.control.BehaviorBase
com.sun.javafx.scene.control.SkinBase
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Layout Children Method
void layoutChildren()
Layout all of the children of a Region
based component
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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 out the
best width and height of your
component.
Your component must do the same for
its children
Implement at least compute pref width
and pref height methods!
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Layout Methods
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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
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Writing JavaFX
Containers
Event Input on Node
Mouse Events fall under the pointer
iteraction (single)
Clicked, Entered, Exited, Pressed, Dragged,
Released, Wheel
Target Entered, Target Exited
Key Events
Clicked, Pressed, Released
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Event Input on Node
It is possible to consume an event and
stop it bubbling further down the
scenegraph hierarchy
You can block a component from event
interaction
Using clever tricks (opaque shape) you
can implement dialog / focus / modal
behaviour
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Layout Secrets
Reuse SDK Methods
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Some SDK Methods
Region#layoutInArea()
Region#positionInArea()
Node#resize()
Node#resizeRelocate()
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Demo
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)
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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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Tools
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Tools
We badly need a JavaFX Property plug-
in for various IDE
Otherwise the Groovy script will do for
now
Scene Builder is coming
FXML is always
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Alternative JVM Languages
Still new to comment on the best
practice for writing component in other
languages other than Java
Consider using a Java interface
Prefer to use and expose JavaFX
Properties
Learn JavaFX against Java, First!
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Six Months, 2012 … Okay!
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Design
Think of JavaFX as a sophisticated
composition engine
á la PhotoShop without the pixel access
Learn U/I/X design from elsewhere
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Boagworld.com
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Books
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End Game
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Blow your toe off now!
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However, we are behind the
wave! Let us learn from the web
technologists and the mobile
app leaders and ran past them!
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Test JavaFX 2.0 User
Interface against your target
users BEFORE and AFTER
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Learn more
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http://xenonique.co.uk/blog/
http://javafx.com/
twitter:peter_pilgrim
Professional Services
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JavaFX 2.0 in Enterprises
Contracting
Training with Consultancy
Technical Leadership
Can I have a HIRES JavaFX logo
please?
A work in Progress
Source Code to be added
Demos to be completed in September
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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/
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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/
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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/
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Beyond Java Today
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Beyond Java Future 2016?
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