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© Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. Tom Schindl – BestSolution.at Lars Vogel – http://www.vogella.de Kai Tödter – Siemens AG
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Theory The e4 Programming Model – Tom Schindl The Workbench Model – Lars Vogel Styling in e4 – Kai Tödter Labs Programming Model (looking a bit behind e4 Dependency Injection) Create an RCP-Application from scratch Work with CSS to retheme the Contacts Demo © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 2
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USB-Sticks with Eclipse-SDK Only copy the version you need for your OS located at SDK-Folder Slides as PDFs located in slides-Folder Examples code located in samples-Folder Solutions code located in solutions-Folder © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 3
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Copy the e4 zip file on your laptop and unzip it. Start e4 with eclipse.exe Use File -> Import -> „Existing Projects into Workspace“ to import the projects from directory „samples“. „Select archive file“ -> *.zip 4 © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Tom Schindl BestSolution.at © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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POJO as the Programming Model Dependency Injection JSR 330 Annotations e4 specific Annotations The IEclipseContext Handlers Lab Tasks © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 6
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All building blocks of e4 are POJO © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 7
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Part UI Component representing an Editor, Table, Tree, … Most likely has a constructor which accepts a Composite Handler Reacts on Commands execute by the user through Button press, KeyBinding, … Has to have a method named execute() with a variable number of Parameters © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 8
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What is DI Inversion of control: Your application doesn’t reach out stuff but gets it provided/injected from the outside framework e4 provides an JSR 330 compatible injection implementation @Inject – Field, Constructor and Method injection @Named – Specify a custom qualifier to context object (default is fully qualified classname of the injected type) © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 9
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Example of an e4-Part © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 10 public class MyPart { @Inject private ECommandService cmdService; @Inject public SampleView(Composite parent) { } @Inject private void setSelection(@Optional @Named( IServiceConstants.SELECTION) Contact contact) { // Handle changed selection } private void execCommand() { // Execute command }
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e4 specific Annotations @Optional: Marking the parameter as optional @PostConstruct: Called after Object created and Fields- and Methods-Injection finished @PreDestroy: Called before the object is destroyed (e.g. the Part shown in the UI is removed) © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 11
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Example Usage of e4 PostConstruct /PreDestroy Annotations © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 12 public class MyPart { @Inject private ITimerService timerService; @PostConstruct private void init() { if(timerService != null) { // Do something } @PreDestroy private void uninit() { if(timerService != null) { // Do something }
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IEclipseContext Stores information of possible Injection Values Hierarchical Datastructure Rootcontext backed up by OSGi-Service Registry (every registered as an OSGi-Service can get injected) Dynamic context information: Possibility to contribute an IContextFunction through DS to construct Objects on the fly © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 13
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Eclipse DI can consumed standalone in OSGi- Applications © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 14 public Object start() { // Get Bundle Information Bundle bundle = FrameworkUtil.getBundle(getClass()); BundleContext bundleContext = bundle.getBundleContext(); IEclipseContext eclipseCtx = EclipseContextFactory.getServiceContext(bundleContext); // Fill Context with information using set(String,Object) // … // Create instance of class ContextInjectionFactory.make(MyPart.class, eclipseCtx); }
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Implement an Execute-Method Can have any number of arguments Use IServiceConstants for general context informations © Tom Schindl and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 15 public class AboutHandler { public void execute(@Named(IServiceConstants.ACTIVE_SHELL) Shell shell){ MessageDialog.openInformation( shell, "About", "e4 Application example."); }
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Create a Headless RCP-Application Add as dependency ▪ org.eclipse.e4.core.services ▪ javax.inject ▪ org.eclipse.swt ▪ org.eclipse.jface Create a class MyPart with a TableViewer Constructor accepts an SWT-Composite 16 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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Import org.eclipse.tutorial.pgm.service Inject org.eclipse.tutorial.pgm.service.ITimeService Register Listener in postconstruction phase and update viewer with Informations Unregister Listener in predestroy 17 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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Use Method-Injection Add method set-method which injects an Object of type String known under the FQN „org.eclipsecon.myObject“ (hint use the @Named and @Optional ) Start a thread before launching the event loop and set a new value in the IEclipseContext for „org.eclipsecon.myObject“ 18 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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Lars Vogel
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The existing Eclipse 3.x UI model e4 workbench model Model to UI -> Renderer „The 20 things“ aka as Services
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Create a new applicaton via File -> New -> Other -> e4 -> e4 Application Project Choose a name, e.g. „org.eclipsecon.e4.first“ Leave all default and go to the last tab and press finish. On the „org.eclipsecon.e4.first.product“ select the overview tab. Press „Launch an Eclipse application“ -> your application should start In case you have problem, please use „de.vogella.e4.rcp.wizard“ from your important workspace as a reference. 21 © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Why a new approach?
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UI Contributions via plugin.xml Stored in separate registries (ViewRegistry, EditorRegistry) Several advisers, e.g Actions created by ActionBarAdvicers UI model is pre-defined © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Not easy to test No single place to look for the workbench model © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Editor
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PlatformUI.getWorkbench() Platform.getExtensionRegistry() ResourcePlugin.getWorkspace() Dependencies make UI difficult to test and hard to re-use © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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27 If I only had a consistent view of the Eclipse workbench
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e4 Workbench Model EMF inside © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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If I only had a consistent view and behavior of the Eclipse workbench 5 reasons why using EMF is fantastic: Proven domain model technology Runtime small (1.5 MB) and highly optimized Tooling available Easy to build visual tools on top Tap in to the EMF ecosystem (EMF-Compare, CDO, …) © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Model „ UIElements.ecore“ is contained in plugin „org.eclipse.e4.ui.model.workbench“
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Application Part (aka View / Editor)
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Each application has it‘s live model Workbench window Menu with menu items Window Trim, e.g. toolbar with toolbar items Parts Sash Container ▪ Parts Part Stack ▪ Parts Handlers Key Bindings Commands © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Perspectives are options Stack / Slash Forms are optional Extend it to get your own functionality (more on renderes later) © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Application.e4xmi Base Model provided by xmi file (Application.e4xmi) Model Components are contribution of extension point „ org.eclipse.e4.workbench.model” Model can be dynamically changed by Code User model changes are stored as (intelligent) deltas and applied during startup. © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de) Application.e4xmi Model Components User changes
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Only models the Application (frame) Modeled Workbench Content of the view not part of the e4 model
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The Part in the Model The Part’s URI © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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public class ListView { @Inject private IEclipseContext context; @Inject public ListView(Composite parent) { //... © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de) Parts are POJO’s Services are injected via the the framework Defined Lifecycle via annotioans ( @PostConstruct, @Predestroy) Re-usable Easier to test
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© Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de) Eclipse e4 Eclipse 3.x
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Handlers have and id and a command have an URI for the implementing class, e.g. platform:/plugin/...SaveHandler Commands have and id and a name can be inserted in menus and toolbars Menus / Toolbar Use commands or DirectItems © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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How is this model translated into UI components?
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The Workbench model is independent of a specific UI toolkit Each UI elements gets are renderer Renderer manage Lifecycle of the UI-Element Creation Model to widget binding Rendering Disposal © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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During startup, the app context is asks for an IPresentationEngine service The default is an SWT based presentation engine The presentation engine asks the RenderFactory for the Renderers of the individual UI components © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de) org.eclipse.e4.workbench.ui.renderers.swt.WorkbenchRendererFactory returns org.eclipse.e4.workbench.ui.renderers.swt.SWTPartRenderer for the model components e.g. org.eclipse.e4.workbench.ui.renderers.swt.SashRenderer
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public class WorkbenchRendererFactory implements IRendererFactory { public AbstractPartRenderer getRenderer(MUIElement uiElement, Object parent) { if (uiElement instanceof MPart) { if (contributedPartRenderer == null) { contributedPartRenderer = new ContributedPartRenderer(); initRenderer(contributedPartRenderer); } return contributedPartRenderer; } //... © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Long-running operations Progress reporting Error handling Navigation model Resource management Status line Drag and drop Undo/Redo Accessing preferences Editor lifecycle Receiving input Producing selection Standard dialogs Persisting UI state Logging Interface to help system Menu contributions Authentication Authorization
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© Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de) Other services are for example Logger IShellProvider OSGi services is also available via dependency injection Workbench Services follow usually with E*Service pattern, e.g. EPartService ESelectionService EModelService
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Load the project „de.vogella.e4.rcp.first“. Start the application via the.product file and validate that the application is working. Select the Application.e4xmi file, right click and select Open- with „E4 WorkbenchModel Editor “. Rename the menu entry „Hello“ Rename the title of the „View1“ Change the order of the Views in the stack. 48 © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Load the project „de.vogella.e4.rcp.modelcontributions“. Open plugin.xml and check the extension point „ org.eclipse.e4.workbench.model” Review the files „components.e4xmi“ and „components2.e4xmi“ Create a new class „ org.eclipse.e4.modelcomponets.parts.Part4“ as a copy of an existing part and add it via model contribution to your UI. Remember that all ID‘s must be unique!! Remember to use the correct ID for the parent!! 49 © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Load the project „ de.vogella.e4.rcp.first“. Open class „ org.eclipse.e4.modelcomponets.parts.View1“ Add private member @Inject Logger logger Write some log messages in the method init(), for example logger.info("UI will start to build"); 50 © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)
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Kai Tödter Siemens Corporate Technology © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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CSS Styling Demo Lab Task Discussion © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 52
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In Eclipse 3.x, UI styling can be done using The Presentation API Custom Widgets These mechanisms are very limited It is not possible to implement a specific UI design, created by a designer e4 provides a CSS based UI styling that addresses all the above issues 53 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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54 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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55 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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56 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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57 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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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; } 58 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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Menu bar background Table headers Partly implemented: Gradients Planned: Having similar capabilities compared with WebKit’s gradients 59 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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Create a contribution to the 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"> 60 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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Java Label label = new Label(parent, SWT.NONE); label.setData("org.eclipse.e4.ui.css.id", "SeparatorLabel"); CSS #SeparatorLabel { color: #f08d00; } 61 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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CSS has a well known syntax But which UI elements can be styled? Which CSS attributes does a specific element support? The first approach for the above questions might be an Xtext-based editor, with content assist for both elements and attributes A project is already set up, stay tuned… 62 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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63 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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It is possible to change the CSS based styling at runtime Good for accessibility Good for user preferences 64 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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Getting the styling engine: Display display = shell.getDisplay(); final CSSEngine engine = (CSSEngine) display.getData( "org.eclipse.e4.ui.css.core.engine"); This is a current workaround The engine should be a service accessible through the EclipseContext 65 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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URL url = FileLocator.resolve(new URL( "platform:/plugin/org.eclipse.e4.demo.contacts/css/new.css")); InputStreamReader streamReader = new InputStreamReader( url.openStream();); engine.reset(); engine.parseStyleSheet(streamReader); streamReader.close(); try { shell.setRedraw(false); shell.reskin(SWT.ALL); } finally { shell.setRedraw(true); } 66 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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67 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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Designers are working on a new e4 workbench look Watch bug 293481 for mockups Windows XP Windows 7 Mac Cocoa https://bugs.eclipse.org/bugs/show_bug.cgi?i d=293481 https://bugs.eclipse.org/bugs/show_bug.cgi?i d=293481 68 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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69 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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70 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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Install the Contacts Demo sources form the USB stick Start the demo Edit both css/dark-gradient.css and css/bright-gradient.css Play around switching the css styles at runtime and watch the differences you made Optional: Create a new colorful psychedelic look for the Contacts Demo. Send screen shots to kai@toedter.com 71 © Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License.
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72 © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de) Eclipse e4 Wiki http://wiki.eclipse.org/E4 http://wiki.eclipse.org/E4 Eclipse e4 Tutorial http://www.vogella.de/articles/EclipseE4/article.html http://www.vogella.de/articles/EclipseE4/article.html Eclipse e4 Whitepaper http://www.eclipse.org/e4/resources/e4-whitepaper.php http://www.eclipse.org/e4/resources/e4-whitepaper.php Tom Schindl‘s Blog http://tomsondev.bestsolution.at/ http://tomsondev.bestsolution.at/ Kai Toeder http://www.toedter.com/blog/ http://www.toedter.com/blog/ Lars Vogel‘s Blog http://www.vogella.de/blog http://www.vogella.de/blog
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Target http://www.sxc.hu/photo/1078182 Rusty stuff http://www.sxc.hu/photo/450663 Binder: http://www.sxc.hu/photo/443042 Something is different http://www.sxc.hu/photo/944284 Praying Girl http://www.sxc.hu/photo/646227 Pin http://www.sxc.hu/photo/771409 Box: http://www.sxc.hu/photo/502457 Screws http://www.sxc.hu/photo/1148064 House with compartments http://www.sxc.hu/photo/494103 Stacked stones http://www.sxc.hu/photo/998524 Thinking Guy http://www.sxc.hu/photo/130484 Drawing Hand http://www.sxc.hu/photo/264208 Waiter http://www.sxc.hu/photo/157966
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© Kai Tödter and others, Licensed under Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License. 74
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This work is licensed under the Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Germany License See http://creativecommons.org/licenses/by-nc- nd/3.0/de/deed.en_UShttp://creativecommons.org/licenses/by-nc- nd/3.0/de/deed.en_US Many slides are based on the work of: Tom Schindl and Kai Tödter Tom Schindl, BestSolution, see http://www.bestsolution.athttp://www.bestsolution.at Kai Tödter, Siemens AG 75
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