Title: Event Touch / Gestures Description First Name: Merwan Last Name: Ouddane Type: Talk Video: https://www.youtube.com/watch?v=BWHSaeDXw8I Abstract: Merwan is implement gestures in Pharo for touch devices. In this talk, he’ll present what has been accomplished with some examples. He will also demonstrate how to use gestures in applications using OSWindow and how to add new gestures. Bio: Merwan is a 3rd year student in computer engineering who started to use Pharo this year. He is currently doing an internship with the RMoD team at Inria Lille.

1. Modern Event Touch
and Gestures for Pharo
Merwan Ouddane
University Lille 1
RMoD Team
ESUG 2015
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2. Where are touch devices present ?
Library
Meeting room
Museum
Schools
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3. What do we need ?
Receive touch events
Recognize a gesture from a sequence of events
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4. Pharo’s windowing system before
Event are generated by the VM
It’s old…
Incosmplete (Mouse, Keyboard, Complex)
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5. OSWindow
API created to handle system window + their events
At image side instead of VM side
Cross-platform
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6. OSWindow
OSWindow
SDL TUIO VM ...
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7. SDL
 https://www.libsdl.org/
 Development library
 Cross-platform
 Allows a low level access to
hardware
 Large list of events
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Syberia II, game made with SDL

8. Existing gestures
Scroll
Rotation
Pinch
Swipe
Hold
Double tap
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Demo time !

9. Event path
 Generated event by the driver
 The event is converted into an OSWindow event
 The event is send to the window
 Event handled
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SDL Event
OSWindow
Event
OSWindow
Event
Handler
SDL Events do not creep into Pharo !

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11. Interactions between handler and gesture detector
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12. Create and compose gestures
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13. Where can it used ?
 Interactive table like the TUIO table
 Infra-red table, sending events by web socket
 Phones, tablets, computers with touch screen
 Computers with touchpad
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14. Where it has been used ?
3D modelisation with Woden
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15. Where it has been used ?
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16. How to play ?
Everything will be on CI (as soon as I can) :
https://ci.inria.fr/gestures
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17. Thanks to Thales for the sponsor
For any information: merwan.ouddane@inria.fr
Videos on Pharo Project’s youtube account ! 17