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Examples.st 1.1 KB

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  1. Smalltalk createPackage: 'Examples'!
  2. Widget subclass: #Counter
  3. slots: {#count. #header}
  4. package: 'Examples'!
  5. !Counter commentStamp!
  6. This is a trivial Widget example mimicking the classic Counter example in Seaside.
  7. In order to play with it, just evaluate the doit below in a workspace.
  8. Then take a look in the HTML document above the IDE.
  9. Counter tryExample!
  10. !Counter methodsFor: 'actions'!
  11. decrease
  12. count := count - 1.
  13. header contents: [ :html | html with: count asString ]
  14. !
  15. increase
  16. count := count + 1.
  17. header contents: [ :html | html with: count asString ]
  18. ! !
  19. !Counter methodsFor: 'initialization'!
  20. initialize
  21. super initialize.
  22. count := 0
  23. ! !
  24. !Counter methodsFor: 'rendering'!
  25. renderOn: html
  26. header := html h1
  27. with: count asString;
  28. yourself.
  29. html button
  30. with: '++';
  31. onClick: [ self increase ].
  32. html button
  33. with: '--';
  34. onClick: [ self decrease ]
  35. ! !
  36. !Counter class methodsFor: 'example'!
  37. tryExample
  38. "In order to play with the Counter, just select the
  39. doit below and press the Do it button. Then take a
  40. look in the HTML document above the IDE."
  41. "Counter tryExample"
  42. self new appendToBrush: 'body' asBrush
  43. ! !