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- EventManager(object)
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- ExamineManager
class ExamineManager(EventManager) |
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Interaction EventManager for "Examine" mode
This interaction manager implements an examine mode
similar to that found in VRML97 browsers. Pointing
to an object and dragging up/down left/right causes
the viewpoint to orbit around the object as if the
object were held in the hand and being rotated.
The manager uses the trackball thereby the dragwatcher
to provide screen-relative scaling of the input. In
other words, distances are measured as fractions of
the distance to the edge of the screen.
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- Method resolution order:
- ExamineManager
- EventManager
- object
Methods defined here:
- OnBind(self)
- Bind the events needing binding to run the examine mode
Customisation point for those needing custom controls
- OnBuildTrackball(self, platform, center, event, width, height)
- Build the trackball object
Customisation point for those wanting to use a different
trackball implementation.
- OnUnBind(self)
- UnBind the events for the examine mode
Customisation point for those needing custom controls
- ProcessEvent(self, event)
- Respond to events from the system
Customisation point for those needing custom controls
- __init__(self, context, platform, center, event)
- Initialise the ExamineManager
context -- Context instance
platform -- ViewPlatform instance
center -- object-space coordinates about which to revolve
event -- event which began the examine interaction.
- cancel(self, event)
- Cancel the examine mode, return to original position and orientation
- release(self, event)
- Trigger cleanup of the examine mode
- update(self, event)
- Update the examine trackball with new mouse event
This updates the internal position, then triggers a
redraw of the context.
Data and other attributes defined here:
- type = 'examine'
Class methods inherited from EventManager:
- registerCallback(cls, key, function=None, node=None, capture=0) from type
- Register callback function for the given key (possibly node-specific)
key -- as returned by event.getKey()
function -- callable function taking at least an
event object as it's first parameter, or None
node -- the node to be watched, None to register a
context-level callback ( default )
capture -- if true, capture events before passing to
children, rather than processing during the
bubbling phase. (default false)
Note: this method would normally be called by a sub-
class with the calculated key for the sub-class.
return previous callback function or None
Data descriptors inherited from EventManager:
- __dict__
- dictionary for instance variables (if defined)
- __weakref__
- list of weak references to the object (if defined)
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