Re: [osg-users] Use the mouse scroll button?
Hi,
no need to go into this hassle here is a snippet how to use the scroll info
from the mouse.
A modified example from Leandro Motta Barros.
Good luck
Dimi
#include iostream
#include string
#include sstream
#include osg/Geometry
#include osgGA/GUIEventHandler
#include osgViewer/Viewer
#include osgGA/TrackballManipulator
// - TranslateScrollData ---
std::string TranslateScrollData (const osgGA::GUIEventAdapter ea)
{
std::string ret;
switch (ea.getScrollingMotion())
{
case osgGA::GUIEventAdapter::SCROLL_NONE:
ret += SCROLL_NONE;
break;
case osgGA::GUIEventAdapter::SCROLL_LEFT:
ret += SCROLL_LEFT;
break;
case osgGA::GUIEventAdapter::SCROLL_RIGHT:
ret += SCROLL_RIGHT;
break;
case osgGA::GUIEventAdapter::SCROLL_UP:
ret += SCROLL_UP;
break;
case osgGA::GUIEventAdapter::SCROLL_DOWN:
ret += SCROLL_DOWN;
break;
case osgGA::GUIEventAdapter::SCROLL_2D:
ret += SCROLL_2D;
break;
}
std::stringstream sstr;
sstr ea.getScrollingDeltaX() ea.getScrollingDeltaY());
ret += Delta = ( + sstr.str();
return ret;
}
// - MyEventHandler
class MyEventHandler: public osgGA::GUIEventHandler
{
public:
virtual bool handle (const osgGA::GUIEventAdapter ea,
osgGA::GUIActionAdapter)
{
switch (ea.getEventType())
{
case osgGA::GUIEventAdapter::NONE:
{
std::cout NONE\n\n;
break;
}
case osgGA::GUIEventAdapter::SCROLL:
{
std::cout SCROLL\n
Event data: TranslateScrollData (ea) '\n';
break;
}
default:
{
return false;
}
} // switch (...)
// Time in seconds since the program started
std::cout Time = ea.time() \n\n;
return true;
}
};
// - main --
int main (int argc, char* argv[])
{
// Create a Producer-based viewer
osgViewer::Viewer viewer;
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
viewer.setUpViewInWindow (10, 10, 640, 480);
// A geode is a geometry node. It is-a 'Node' and contains 'Drawable's.
osg::ref_ptrosg::Geode geode (new osg::Geode());
// Set scene graph root (the geode, since it is the only 'osg::Node' around)
viewer.setSceneData (geode.get());
osg::ref_ptrosgGA::GUIEventHandler eh (new MyEventHandler);
viewer.addEventHandler (eh.get());
// Enter rendering loop
viewer.realize();
while (!viewer.done())
{
viewer.frame();
}
}
- Original Message
From: Robert Osfield robert.osfi...@gmail.com
To: OpenSceneGraph Users osg-users@lists.openscenegraph.org
Sent: Monday, April 27, 2009 5:51:04 PM
Subject: Re: [osg-users] Use the mouse scroll button?
Hi Julio,
The TrackballManipulator now has support for mouse wheel, but as it
was added in March you'll need to grab one of the 2.9.x dev release
series or svn/trunk to get access to it. Potentially you could
backport it to the version of the OSG you are using if it's not one of
the above.
Robert.
On Mon, Apr 27, 2009 at 3:14 PM, Julio Campos Alvarez
julio.campos.alva...@gmail.com wrote:
Hello,
I'm trying to use the mouse scroll button as if it was the right mouse
button. All I want to do is move the camera closer and further with the
mouse scroll button...
The problem is that I don't receive the events by just moving the
scroll. In order to get the event I need to press a button (either
keyboard or mouse), once a button is pressed I will get all the events
in the queue.
Has anyone done something like this?
Here is the code from my modified trackball manipulator:
bool handle(const osgGA::GUIEventAdapter ea,osgGA::GUIActionAdapter us)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::FRAME):
if (_thrown)
{
if (calcMovement()) us.requestRedraw();
}
return false;
default:
break;
}
if (ea.getHandled()) return false;
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::PUSH):
{
flushMouseEventStack();
addMouseEvent(ea);
if (calcMovement()) us.requestRedraw();
us.requestContinuousUpdate(false);
_thrown = false;
return true;
}
case(osgGA::GUIEventAdapter::SCROLL
[osg-users] Use the mouse scroll button?
Hello,
I'm trying to use the mouse scroll button as if it was the right mouse
button. All I want to do is move the camera closer and further with the
mouse scroll button...
The problem is that I don't receive the events by just moving the
scroll. In order to get the event I need to press a button (either
keyboard or mouse), once a button is pressed I will get all the events
in the queue.
Has anyone done something like this?
Here is the code from my modified trackball manipulator:
bool handle(const osgGA::GUIEventAdapter ea,osgGA::GUIActionAdapter us)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::FRAME):
if (_thrown)
{
if (calcMovement())
us.requestRedraw();
}
return false;
default:
break;
}
if (ea.getHandled()) return false;
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::PUSH):
{
flushMouseEventStack();
addMouseEvent(ea);
if (calcMovement()) us.requestRedraw();
us.requestContinuousUpdate(false);
_thrown = false;
return true;
}
case(osgGA::GUIEventAdapter::SCROLL):
{
int x = 0;
//Here I have a brakpoint :)
//_distance += 100.0f;
return true;
}
//
case(osgGA::GUIEventAdapter::KEYDOWN):
if (ea.getKey()==
osgGA::GUIEventAdapter::KEY_Space)
{
flushMouseEventStack();
_thrown = false;
home(ea,us);
return true;
}
return false;
Thank you very much
___
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Re: [osg-users] Use the mouse scroll button?
Hi Julio,
The TrackballManipulator now has support for mouse wheel, but as it
was added in March you'll need to grab one of the 2.9.x dev release
series or svn/trunk to get access to it. Potentially you could
backport it to the version of the OSG you are using if it's not one of
the above.
Robert.
On Mon, Apr 27, 2009 at 3:14 PM, Julio Campos Alvarez
julio.campos.alva...@gmail.com wrote:
Hello,
I'm trying to use the mouse scroll button as if it was the right mouse
button. All I want to do is move the camera closer and further with the
mouse scroll button...
The problem is that I don't receive the events by just moving the
scroll. In order to get the event I need to press a button (either
keyboard or mouse), once a button is pressed I will get all the events
in the queue.
Has anyone done something like this?
Here is the code from my modified trackball manipulator:
bool handle(const osgGA::GUIEventAdapter ea,osgGA::GUIActionAdapter us)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::FRAME):
if (_thrown)
{
if (calcMovement())
us.requestRedraw();
}
return false;
default:
break;
}
if (ea.getHandled()) return false;
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::PUSH):
{
flushMouseEventStack();
addMouseEvent(ea);
if (calcMovement()) us.requestRedraw();
us.requestContinuousUpdate(false);
_thrown = false;
return true;
}
case(osgGA::GUIEventAdapter::SCROLL):
{
int x = 0;
//Here I have a brakpoint :)
//_distance += 100.0f;
return true;
}
//
case(osgGA::GUIEventAdapter::KEYDOWN):
if (ea.getKey()==
osgGA::GUIEventAdapter::KEY_Space)
{
flushMouseEventStack();
_thrown = false;
home(ea,us);
return true;
}
return false;
Thank you very much
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