1. S.Ducasse 1
QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
Stéphane Ducasse
Stephane.Ducasse@univ-savoie.fr
http://www.listic.univ-savoie.fr/~ducasse/
The Squeak Environment

2. S.Ducasse 2
License: CC-Attribution-ShareAlike 2.0
http://creativecommons.org/licenses/by-sa/2.0/

3. S.Ducasse 3
Smalltalk Run-Time Architecture
• Virtual Machine + Image + Changes and Sources
• Image = bytecodes
• Sources and changes = code (text)
A bytethe vir
IMAGE2IMAGE2StandShar
IMAGE1.IMAGE1.
All the objeat a momen
One per us
+

4. S.Ducasse 4
Runtime Architecture
• The byte-code is in fact translated into native code by a
just-in-time compiler.
• The source and the changes are not necessary for
interpreting the byte-code, this is just for the
development. Normally they are removed for
deployment.
• An application can be delivered as some byte-code files
that will be executed with aVM.The development image
is stripped to remove the unnecessary development
components.

5. S.Ducasse 5
Mouse Semantics
SelectOperatWinRed BlueYellow

6. S.Ducasse 6
World Menu and Open Menu

7. S.Ducasse 7
Browsing a class

8. S.Ducasse 8
Browsing methods

9. S.Ducasse 9
Inspector
• To look inside objects
• Violates encapsulation!!!
• Monster new inspect

10. S.Ducasse 10
Direct Manipulation
• Bring the halo
• Experiment

11. S.Ducasse 11
Debugger?

12. S.Ducasse 12
Debugger !!!

13. S.Ducasse 13
FileList

14. S.Ducasse 14
Message Names Finder

15. S.Ducasse 15

16. S.Ducasse 16
Methods in ChangeSets +Versions

17. S.Ducasse 17
Preferences

18. S.Ducasse 18
SUnit

19. S.Ducasse 19
Transcript is Sloooooooooooow
19

20. S.Ducasse 20
Squeak Map Package Loader

21. S.Ducasse 21
Monticello

22. S.Ducasse 22
Monticello Change Browser

23. S.Ducasse 23
Repository

24. S.Ducasse 24
SqueakSource
24

25. S.Ducasse 25
Changes Menu…Recently logged files
• Everything you do is recorded

26. S.Ducasse 26
ChangeSorter: to sort your changes

27. S.Ducasse 27
Cool Packages to Load
Shout
Refactoring Browser
eCompletion

28. S.Ducasse 28
Change your Mind
Everything you do is recorded !!
So try and learn how to recover your code
You are smart so
Experiment,
Learn for you, browse,
educate your taste (not all Squeak code is good)
Be aggressive, ***all*** the code is there