Multimedia Fun with OpenOffice Calc 發表於OSDC.tw 2013 2013/4/19 15:30中研院國際會議室 Get Calc Mosaic at http://sf.net/p/calcmosaic

1. Multimedia Fun with
OpenOffice Calc
imacat
imacat@mail.imacat.div.tw
2013-04-19

2. “Multimedia Fun with OpenOffice Calc” is created by imacat (Yang Shih-Ching),
and licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License

3. Create charts and reports

4. imacat
● Member of the Apache OpenOffice Project
Management Committee
● An OpenOffice committer
● System administrator of OpenOffice forum
and Wiki
● A member of Women in Free and Open
Source Software
● A graduate student from National Taiwan
Normal University

5. Question:
What do you do with a spreadsheet?

6. Counting salaries

7. Counting student scores

8. Creating charts and reports

9. Creating quotations

10. Doing calculation for strategy games

11. Voting machine

12. …

13. This talk is a modification
of my previous talk
in ApacheCon Europe 2012
at Sinsheim, German
on 2012/11/6…

14. …with additions of
some of my interesting works afterwards.

15. And my talk in German
was based on my lightning talk
in COSCUP 2013

16. Has anyone attended to my lightning talk
in COSCUP 2013?
Has anyone remember what I had done?

17. My lightning talk in COSCUP 2013
was about something I did
just one week before COSCUP 2013,
which I had not enough time
to finish and present it completely.

18. And here is the story.

19. Long time ago in the far, far land
when I was still a child…

20. Long time ago in the far, far land
when I was still a child…
Well, actually it was only in last August. :p

21. I saw on my RSS reader...

22. So I followed the story and
watched the video…

23. It’s cool, isn’t it?

24. It’s cool, isn’t it?
Yes, it’s SO COOL!

25. I forwarded it onto our Google Plus,
our Facebook fans page,
our forums, local forum, etc.

26. I forwarded it onto our Google Plus,
our Facebook fans page,
our forums, local forum, etc.
Then I put it away
and return to my textbook.

27. Until I saw Rob talking about this
video the next day…

28. So I watched it again, and also the
“behind the scenes”…

29. Well, I think…

30. Well, I think…
Yeah, I can do it…

31. Well, I think…
Yeah, I can do it…
programmatically!

32. Creating mosaic arts involves
calculating the average colors of image blocks.
Since neither OpenOffice BASIC nor UNO API
has any method
to obtain the colors of individual pixels,
I have use Java to do this.

33. So here it is… ^_^

34. (demonstration)

35. It’s cool, isn’t it?

36. No.

37. No, that’s not cool.
It’s uglier than the original “Stop-Motion Excel”.
It’s not the “eye candy” that I imagined.

38. Why?
The original “Stop-Motion Excel”
was painted manually, cell by cell.
MysteryGuitarMan painted it with a fixed
palette, but not “average colors”.
It looks sharp. It feels like an animation.

39. Comparing Hand-Painted Colors
with Mosaic Average Colors

40. So I need to find something more cool,
something sharp,
something with a high contrast.

41. That is not an easy task.

42. The idea of Calc Mosaic
is not only to create mosaic arts,
but also to create stop-motion animations.

43. But it takes averagely 20 seconds
to create a spreadsheet of mosaic art
with the Java UNO application.
I cannot run the animation
by creating the mosaic art at real-time.

44. So I turn to another method,
to create each frame with a spreadsheet,
and play them in sequence,
as a stop-motion animation.

45. But then a spreadsheet document can only
contain a maximum of 256 spreadsheets.

46. Since I only have 256 frames,
this cannot be long.

47. I remembered there is the iPod Ad

48. The iPod Ad…
● Has only 31 seconds, corresponding to 8
FPS if we are having 256 frames.

49. The iPod Ad…
● Has only 31 seconds, corresponding to 8
FPS if we are having 256 frames.
● Has sharp images, high contrasts.

50. The iPod Ad…
● Has only 31 seconds, corresponding to 8
FPS if we are having 256 frames.
● Has sharp images, high contrasts.
● Is very famous.

51. So here it is…

52. (demonstration)

53. At the same time, Villeroy responded to my
Calc Mosaic on the forum, using a different
approach.

54. Villeroy’s Response

55. So here it is…

56. (demonstration)

57. As you can see,
Villeroy places the color values in the cells.
The OpenOffice BASIC macro can read and
update the cell background colors accordingly.
OpenOffice BASIC is a lot faster
than Java UNO.
This makes it possible to animate at real time.

58. Villeroy’s approach still has some
disadvantages…

59. Disadvantages of
Villeroy’s Approach
● You still need to have the color values first.

60. Disadvantages of
Villeroy’s Approach
● You still need to have the color values first.
● The frame rate is still low.

61. Disadvantages of
Villeroy’s Approach
● You still need to have the color values first.
● The frame rate is still low.
● Villeroy updates the colors with styles.
– A lot faster than painting the background
color cell by cell.
– The number of colors to use is limited.
That is why it is gray-scaled.

62. This is a different approach than me.
But I still got greatly inspired.

63. The color values can be saved in the sheets,
and painted with OpenOffice BASIC.
This can make it a lot faster.

64. And I know there is the setDataArray()
in the interface XCellRangeData.
I can populate all the color values at once
instead of hundreds of UNO calls
to set the CellBackColor property
Of SheetCell.

65. The New Process Will Be…
1.Calculates the average colors of mosaic
cells with the Java application.

66. The New Process Will Be…
1.Calculates the average colors of mosaic
cells with the Java application.
2.Passes the color values from Java to
OpenOffice BASIC.

67. The New Process Will Be…
1.Calculates the average colors of mosaic
cells with the Java application.
2.Passes the color values from Java to
OpenOffice BASIC.
3.Paints the background colors of the
spreadsheet cells with the OpenOffice
BASIC macro.

68. So the problem becomes:
Writing an application
both in Java and OpenOffice BASIC.

69. So the problem becomes:
Writing an application
both in Java and OpenOffice BASIC.
Or, simply,
Creating the OpenOffice BASIC macros
through the UNO API with Java.

70. In the unpublished UNO API,
there is a BasicLibraries property
in OfficeDocument
that application developers can
access, insert or delete the BASIC macros.

71. There’s also the XScriptProvider interface
that I can use it to invoke
the existing OpenOffice macros.

72. So I use them to “inject” the BASIC macros
into the newly-created spreadsheet document,
and run these macros.

73. In fact, I don’t even need to use setDataArray()
to paste the color values into the spreadsheets.
I can pass the color values as parameters
to the invoked BASIC macros.

74. This is troublesome,
but the result is amazing.
It is 8 times faster then before!

75. When I prepare for my ApacheCon
presentation,
I became more and more greedy.

76. I want something new,
something hot,
something gets people excited!

77. Then I came across this…

78. Something hot…

79. Well, again, I think…

80. Well, again, I think…
Yeah, I can do it!

81. So here is it.

82. When preparing for OSDC.tw,
Gangnam Style became outdated.
I need a new one.

83. (demonstration)

84. That is the story of Calc Mosaic.
To create your own Mosaic video,
get Calc Mosaic at
http://sf.net/p/calcmosaic.

85. More Than Calc Mosaic

86. Last year after I returned from German,
I attended to a speech in our institute
at the end of November.
It was about new media art.

87. New Media Art

88. Oh, no…

89. Oh, no…
I can do it.

90. I can do it…
● I can play piano notes using the Shell
command “mplayer” in OpenOffice BASIC.

91. I can do it…
● I can play piano notes using the Shell
command “mplayer” in OpenOffice BASIC.
● I can attach click events with picture objects.

92. I can do it…
● I can play piano notes using the Shell
command “mplayer” in OpenOffice BASIC.
● I can attach click events with picture objects.
● I can change the colors of the Calc
spreadsheet cells.

93. I can do it…
● I can play piano notes using the Shell
command “mplayer” in OpenOffice BASIC.
● I can attach click events with picture objects.
● I can change the colors of the Calc
spreadsheet cells.
● It's possible to create an animated,
interactive Piano with Calc.

94. (demonstration)

95. Furthermore,
with a little modification,
I released a piano quest
in the Christmas.

96. (demonstration)

97. Thank you.
Any question?