// NOTE: THIS IS JUST A TEMPORARY HACK! :) This functionality will all eventually be
// encapsulate into another class in osgWidget proper.
bool scrollWindow(osgWidget::Event& ev) {
// The first thing we need to do is make sure we have a Frame object...
osgWidget::Frame* frame = dynamic_cast<osgWidget::Frame*>(ev.getWindow());
if(!frame) return false;
// And now we need to make sure our Frame has a valid internal EmbeddedWindow widget.
osgWidget::Window::EmbeddedWindow* ew =
dynamic_cast<osgWidget::Window::EmbeddedWindow*>(frame->getEmbeddedWindow())
;
if(!ew) return false;
// Lets get the visible area so that we can use it to make sure our scrolling action
// is necessary in the first place.
const osgWidget::Quad& va = ew->getWindow()->getVisibleArea();
// The user wants to scroll up; make sure that the visible area's Y origin isn't already
// at 0.0f, 0.0f.
if(ev.getWindowManager()->isMouseScrollingUp() && va[1] != 0.0f)
ew->getWindow()->addVisibleArea(0, -20)
;
else if(va[1] <= (ew->getWindow()->getHeight() - ew->getHeight()))
ew->getWindow()->addVisibleArea(0, 20)
;
// We need to manually call update to make sure the visible area scissoring is done
// properly.
frame->update();
return true;
}
bool windowScrolled(osgWidget::Event& ev) {
osgWidget::warn()
<< "scrolling up? " << ev.getWindowManager()->isMouseScrollingUp()
<< std::endl
;
return true;
}