Eclipse e4
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This document discusses Eclipse 4.0 and the e4 project. It provides an overview of why e4 was created, including to innovate Eclipse and prepare it for the web. It describes the key aspects of e4, including the modeled workbench, dependency injection, declarative styling using CSS, and a compatibility layer for Eclipse 3.x plugins. The presentation concludes by discussing where to learn more about e4.
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Eclipse e4
- 1. Eclipse 4.0 and e4 Chris Aniszczyk Principal Software Engineer [email protected] http://aniszczyk.org http://twitter.com/caniszczyk
- 2. Howdy! โข Hack Eclipse/OSGi/Git โข Evangelist at Red Hat โข Involved heavily at Eclipse โ Eclipse Foundation Board of Directors โ Co-lead PDE and EGit โข Hacking on open source for a decade โ Gentoo Linux, Eclipse, Fedora... โข I like running (5K @ ~18min)
- 3. Agenda Why e4? Eclipse 3.X and e4 l e4 workbench mode Styling and Services Compatibility Layer Conclusion and Q&A
- 4. Lexicon e4 is an Eclipse.org project for platform-related incubation, itโs not a product! Eclipse 4.0 is a release that contains some technology from the e4 project
- 5. Why e4? โข Innovate or become irrelevant โข Use e4 technologies as a basis for Eclipse 4.X (some will show up in the 3.x stream) โข Engage the open source community โข Build a better Eclipse โ Make it more ๏ฌexible โ Prepare for the web โ Dynamic languages โ Fix our mistakes
- 7. Why change? โWeโve already built all our plug-ins. The most important thing is donโt break us.โ (Yes, there is a compatibility layer.)
- 8. Eclipse is mature and huge... 8
- 9. Foundations need to evolve... Eclipse Competition... Francois Schnell, http://www.flickr.com/photos/frenchy/30217773/
- 10. Eclipse 4.0 SDK Early Adopter Release July 2010
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- 16. So, whatโs wrong with Eclipse 3.X?
- 17. Problems with Eclipse 3.x โข Complex โข Lots of API โข Platform functionality via singletons โข Not easy to test โข Not a consistent way to de๏ฌne the UI โข UI makes assumptions, e.g. Editors / Views โข Easy Skinning โข The browser is more powerful now... RIAs...
- 18. If only Eclipse application development would be easier... 8
- 19. Eclipse e4 โ Building blocks Declarative Styling Rendering Engine Modeled Workbench Dependency Injection IEclipseContext Core Services
- 21. The e4 Workbench Model Each application has its live model... think of the browser DOM... โข Built using EMF โข Workbench window โ Menu with menu items โ Window Trim, e.g. toolbar with toolbar items โ Parts Sash Container โข Parts โ Part Stack (CTabFolder) โข Parts โ Handlers โ Key Bindings โ Commands
- 22. The Model is Flexible No distinction between View/ Editor Perspectives are optional Stack / Sash are optional Several windows easily possible Flexible Toolbars
- 23. Parts in e4 Plain Old Java Objects (POJOโs)
- 24. Before e4... inheritance ruled... OBJECT EVENTMANAGER WORKBENCHPART VIEWPART VIEW
- 25. How is this model translated into UI components?
- 26. Model and UI Renderers Model I donโt care who draws me โข The Workbench model is independent of a speci๏ฌc UI toolkit
- 27. Renderers Renderer Factory Eclipse default is the SWT Renderer Can be selected at Startup via parameter
- 28. Renderers Renderer Factory Widget Renderer Returns for every model element
- 29. Widget Renderer โข Each UI elements gets a renderer โข Renderer manage Lifecycle of the UI- Element โ Creation โ Model to widget binding โ Rendering โ Disposal
- 30. e4 and Styling
- 31. Styling in Eclipse 3.x โข UI styling via โ The Presentation API โ Custom Widgets โข Very limited
- 32. In reality all RCP apps look like the an IDE
- 33. Eclipse 3.X - IDE Eclipse e4 โ CSS Styling feeling Example from Kai Toedter Some elements cannot currently not be styled: โข Menu bar background โข Table headers e4 supports theme switching during runtime
- 34. How to enable CSS Styling Property "applicationCSSโ in extension point org.eclipse.core.runtime.products <extension id="product" point="org.eclipse.core.runtime.products"> <product application="org.eclipse.e4.ui.workbench.swt.application" name="E4 Contacs Demo"> <property name="applicationCSS" value="platform:/plugin/contacts/css/dark.css"> </property> </product> </extension>
- 35. Example CSS Label { font: Verdana 8px; color: rgb(240, 240, 240); } Table { background-color: gradient radial #575757 #101010 100%; color: rgb(240, 240, 240); font: Verdana 8px; } ToolBar { background-color: #777777 #373737 #202020 50% 50%; color: white; font: Verdana 8px; }
- 36. Assign custom attributes โข Java Label label = new Label(parent, SWT.NONE); label.setData("org.eclipse.e4.ui.css.id", "SeparatorLabel"); โข CSS #SeparatorLabel { color: #f08d00; }
- 37. The e4 Programming Model
- 38. Dependency Injection โข Inversion of control: The necessary functionality is injected into the class s va Clas Ja
- 39. Dependency Injection in e4 โข JSR 330 compatible injection implementation (think Google Guice) โ @javax.inject.Inject โ Field, Constructor and Method injection โ @javax.inject.Named โ Specify a custom quali๏ฌer to context object (default is fully quali๏ฌed classname of the injected type) โข e4 speci๏ฌc annotations... @Optional
- 40. s va Clas Ja Services are injected via the the e4 framework public class ListView { @Inject private IEclipseContext context; @Inject private Logger logger; @Inject public ListView(Composite parent) { // ...
- 41. CODE EXAMPLES rs-photo, http://www.flickr.com/photos/rs-foto/2129343084/sizes/l/
- 42. Access preference values IPreferenceStore store = IDEWorkbenchPlugin.getDefault() .getPreferenceStore(); boolean saveBeforeBuild = store 3.x .getBoolean(SAVE_BEFORE_BUILD); @Inject @Preference(SAVE_BEFORE_BUILD) boolean saveBeforeBuild; 4.x
- 43. Associate help context with control getSite() .getWorkbenchWindow() .getWorkbench() .getHelpSystem().setHelp( 3.x viewer.getControl(), some_id); @Inject IWorkbenchHelpSystem helpSystem; ... 4.x helpSystem.setHelp( viewer.getControl(), some_id);
- 44. Services
- 45. Eclipse Application Services (โTwenty Thingsโ) ๏ก Editor lifecycle ๏ก Long-running ๏ก Receiving input operations ๏ก Producing selection ๏ก Progress reporting ๏ก Standard dialogs ๏ก Error handling ๏ก Persisting UI state ๏ก Navigation model ๏ก Logging ๏ก Resource management ๏ก Interface to help ๏ก Status line system ๏ก Drag and drop ๏ก Menu contributions ๏ก Undo/Redo ๏ก Authentication ๏ก Accessing preferences ๏ก Authorization ๏ก Donโt forget: OSGi services are also available via dependency injection
- 47. Compatibility Layer โข Compatibility layer centers around org.eclipse.ui.workbench โ Contains code to host 3.x API on e4 โข Note: The 3.x workbench API with some exceptions... โ org.eclipse.ui.presentations โ org.eclipse.ui.themes โ Activities and Capabilities โข API clean plug-ins will run ๏ฌne
- 48. Eclipse 4.0 SDK
- 49. Thanks for listening! For further questions: [email protected] http://aniszczyk.org http://twitter.com/caniszczyk
- 50. Where to go from here Eclipse e4 Website http://www.eclipse.org/e4 Eclipse e4 Wiki http://wiki.eclipse.org/E4 Eclipse e4 Whitepaper http://www.eclipse.org/e4/resources/e4-whitepaper.php Eclipse 4.1 will most likely ship as part of the Indigo release...
- 51. License & Acknowledgements โข This work is licensed under: โ http://creativecommons.org/licenses/by-nc-nd/3.0/de/deed.en_US โข Thank you... โ Boris Bokowski, IBM โ Tom Schindl, BestSolution โ Kai Tรถdter, Siemens AG โ Lars Vogel, SAP AG