Hi,
This is designed behavior, all event handlers get the event and can
decide whether they are happy to handle already handled events or not.
If GUIEventAdapter::getHandled() returns true then the events is
already handled. The Drive/Flight/Tracball etc manipulators now all
check to see an an event has been handled before handling the event -
have a browse through the osgGA source to see how its done.
Robert.
On 6/29/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
hi , all
I use OSG2.0 in windows XP. The source is downloaded using svn.
I add two GUIEventHandler(GUIEventHandler_A and GUIEventHandler_B) to
viewer's eventhandlers.
viewer.addEventHandler(a);
viewer.addEventHandler(b);
withd same event , for example "PUSH" event, although
GUIEventHandler_A return true, the GUIEventHandler_B
will also receive the "PUSH" event. In OSG1.2, GUIEventHandler_B cannot
receive this event when some
pre GUIEventHandler return true.
Is it a bug or designing behavior?
the source code in Viewer.cpp is about line 2090 to 2013 .
for(EventHandlers::iterator hitr = _eventHandlers.begin();
hitr != _eventHandlers.end();
++hitr)
{
if ((*hitr)->handle( *event, *this, 0, 0)) event->setHandled(true);
}
if (_cameraManipulator.valid())
{
if (_cameraManipulator->handle( *event, *this))
event->setHandled(true);
}
I change it to followint to simluate osg1.2 behavior.
for(EventHandlers::iterator hitr = _eventHandlers.begin();
hitr != _eventHandlers.end();
++hitr)
{
if(!event->getHandled()) //add this line
{
if ((*hitr)->handle( *event, *this, 0, 0))
event->setHandled(true);
}
}
if (_cameraManipulator.valid() && !event->getHandled()) //change this
line
{
if (_cameraManipulator->handle( *event, *this))
event->setHandled(true);
}
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