Mars - ESUG 2010
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This document discusses Mars, a framework for building native applications for OSX, iPhone, and iPad using Pharo. It describes Mars' architecture which uses the Objective-C bridge to connect Pharo and Cocoa/CocoaTouch. Views map to Objective-C controls while controllers handle callbacks. The model uses an adaptor to work with different models. Problems with deadlocks are being addressed. The future includes more testing, documentation, and potentially ports to other platforms.
Mars - ESUG 2010
- 1. Mars Just another world jueves 21 de octubre de 2010
- 2. Mars Just another world jueves 21 de octubre de 2010
- 3. Who I am? jueves 21 de octubre de 2010
- 4. Who I am? I really don’t know (yet) jueves 21 de octubre de 2010
- 5. Once upon a time... There was Squeak... jueves 21 de octubre de 2010
- 6. jueves 21 de octubre de 2010
- 7. ...and Squeak had a lot of colors (yes... many people like them... just not me) jueves 21 de octubre de 2010
- 8. ...and other not so good things • no good keybinding and manual handling of tools. • no cool widgets (like trees, etc.) • no native user interface (of course, not Polymorph either) jueves 21 de octubre de 2010
- 9. Then came Pharo! A profesional open-source Smalltalk jueves 21 de octubre de 2010
- 10. jueves 21 de octubre de 2010
- 11. Pharo has good UI improvements • With time, it incorporates • Polymorph! • A good set of key binds (like cmd+w, finally!) • ...and most of this changes are now on Squeak too. jueves 21 de octubre de 2010
- 12. jueves 21 de octubre de 2010
- 13. So, why Mars? • Because native applications rocks • The mac experience matters • We should be able to produce that experience using Pharo. jueves 21 de octubre de 2010
- 14. And what’s Mars? An model, view, controller user interface framework for building native applications for the OSX, iPhone and iPad jueves 21 de octubre de 2010
- 15. Architecture in a slide • Cocoa/CocoaTouch • The ObjectiveCBridge • Model,View, Controller jueves 21 de octubre de 2010
- 16. The bridge jueves 21 de octubre de 2010
- 17. Objective-C bridge • Made by John McIntosh • Present by default in all the latest vm builds • Used on real applications for the iPhone jueves 21 de octubre de 2010
- 18. Objective-C bridge • An object in Pharo forward mesages to Objective-C • A proxy in Objective-C side interacts with a correspondent object in Pharo side. • Everything is handled by semaphores waiting to do something, at both sides • Yes, the coordination of that interaction is tricky, but the bridge does that for us. jueves 21 de octubre de 2010
- 19. The architecture jueves 21 de octubre de 2010
- 20. Architecture:View • As said, any control has it’s corresponding ObjectiveC object. • Everything is inside an Application • Everything is • a Window, • a child of a Window, or • a Dialog • There are lot’s of controls already made, and more to come jueves 21 de octubre de 2010
- 21. Architecture: Controller • Mars handles it’s actions through callbacks installed as a proxy between Pharo and ObjectiveC • Any callback installed is a independent process in Pharo side • Yes, there are lots of processes if you run Mars right now. jueves 21 de octubre de 2010
- 22. Architecture: Model • It uses a standard “model” mechanism • For malleability, we can use MRModelAdaptor • It “borrows” something I saw in Dolphin. • It is an adaptor for any model I need (well... at least any model I needed, but I can grow it later) jueves 21 de octubre de 2010
- 23. Really small demo jueves 21 de octubre de 2010
- 24. Problems jueves 21 de octubre de 2010
- 25. Problems found • The “dead lock” problem • Changed by changing the VM structure • But now there are other problem: no scheduled proccess • Being worked on by John and Eliot. Thanks! jueves 21 de octubre de 2010
- 26. The future Texto jueves 21 de octubre de 2010
- 27. Next steps Make it work, make it right, make it fast • We are still someplace between “make it work” and “make it right”... but we will succeed! (and very soon) • Needs testing (Maybe with FScript) • Needs documentation • Last minute addition: MRNibObject jueves 21 de octubre de 2010
- 28. Far next steps • Mars for Linux and Windows? • There are design issues, and abstraction layers are never a good idea (IMHO) jueves 21 de octubre de 2010
- 29. I would like to see... (1) Modular pharo in a standard (and/or Cog) VM Standard VM MarsPlugin MarsWorld PharoKernel Mars Other packages jueves 21 de octubre de 2010
- 30. I would like to see (2) • The “great and unique and fantastique tool rebuilding call” • Our tools are most of the times old • And our tools are always ugly • Yes, it is an heresy... but a needed one. jueves 21 de octubre de 2010
- 31. Where is Mars? http://www.squeaksource.com/Mars http://code.google.com/p/marsonpharo http://groups.google.com/group/marsonpharo jueves 21 de octubre de 2010
- 32. Where is Mars? http://www.squeaksource.com/Mars (lots of garbage there, so be careful) http://code.google.com/p/marsonpharo http://groups.google.com/group/marsonpharo jueves 21 de octubre de 2010
- 33. Where is Mars? http://www.squeaksource.com/Mars (lots of garbage there, so be careful) http://code.google.com/p/marsonpharo (Nothing right now there, but binaries and oneclicks will be there in the future) http://groups.google.com/group/marsonpharo jueves 21 de octubre de 2010
- 34. Where is Mars? http://www.squeaksource.com/Mars (lots of garbage there, so be careful) http://code.google.com/p/marsonpharo (Nothing right now there, but binaries and oneclicks will be there in the future) http://groups.google.com/group/marsonpharo (No trafic, but specific questions and etc. can be sent there) jueves 21 de octubre de 2010
- 35. Questions? jueves 21 de octubre de 2010