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From Stephan Huber, "attached you'll find a proposal for handling multi-touch-events with

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osgGA. My approach is to bundle all touchpoints into one custom data
structure which is attached to an GUIEventAdapter.

The current approach simulates a moving mouse for the first touch-point,
so basic manipulators do work, sort of.

I created a MultiTouchTrackballManipulator-class, one touch-point does
rotate the view, two touch-points pan and zoom the view as known from
the iphone or other similar multi-touch-devices. A double-tap (similar
to a double-click) resets the manipulator to its home-position.

The multi-touch-trackball-implementation is not the best, see it as a
first starting point. (there's a demo-video at http://vimeo.com/15017377 )"
This commit is contained in:
Robert Osfield
2010-11-22 17:30:44 +00:00
parent 27afe58f77
commit e36c4d3a3b
7 changed files with 325 additions and 4 deletions
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16
include/osgGA/EventQueue
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@@ -157,6 +157,22 @@ class OSGGA_EXPORT EventQueue : public osg::Referenced
/** Method for adapting keyboard press events. Note, special keys such as Ctrl/Function keys should be adapted to GUIEventAdapter::KeySymbol mappings, with specified time.*/
void keyRelease(int key, double time);
GUIEventAdapter* touchBegan(unsigned int id, GUIEventAdapter::TouchPhase phase, float x, float y, double time);
GUIEventAdapter* touchBegan(unsigned int id, GUIEventAdapter::TouchPhase phase, float x, float y) {
return touchBegan(id, phase, x, y, getTime());
}
GUIEventAdapter* touchMoved(unsigned int id, GUIEventAdapter::TouchPhase phase, float x, float y, double time);
GUIEventAdapter* touchMoved(unsigned int id, GUIEventAdapter::TouchPhase phase, float x, float y) {
return touchMoved(id, phase, x, y, getTime());
}
GUIEventAdapter* touchEnded(unsigned int id, GUIEventAdapter::TouchPhase phase, float x, float y, unsigned int tap_count, double time);
GUIEventAdapter* touchEnded(unsigned int id, GUIEventAdapter::TouchPhase phase, float x, float y, unsigned int tap_count) {
return touchEnded(id, phase, x, y, tap_count, getTime());
}
/** Method for adapting close window events.*/