robertosfield wrote:
>
> The osgViewer classes are built around not having any event handlers
> by default and it's the application developers responsibility to add
> these to their applications, so it's not a case of working out how to
> block events but rather just adding the event handlers you need. The
> only exceptions to this rule is the escape key handling setting done -
> which is on by default but can be switched off, and the
> TrackballManipulator that is added as fallback if no other camera
> manipulator is attached when you call Viewer::run().
>
> Robert.
>
I thought so too, but even as I did not add any key event handlers, my Qt
elements jump around the screen as I press anything! Could it be something
about Qt? The thing is Qt is all fine while it's in screen mode, I mean, when I
use Qt forms etc -- but when I put it inside OSG scene as 3d-model, things
start to happen.
Here is code, how I create button and put it on scene:
Code:
QWidget* widget = 0;
widget = new QWidget;
widget->setLayout(new QVBoxLayout);
QPushButton* button = new MyButton(buttonText);
button->setFixedSize(width-30,height-10);
widget->layout()->addWidget(button);
// widget->setGeometry(0, 0, 800,600);
QGraphicsScene* graphicsScene = 0;
osg::ref_ptr<osgQt::QWidgetImage> widgetImage = new
osgQt::QWidgetImage(widget);
#if (QT_VERSION >= QT_VERSION_CHECK(4, 5, 0))
widgetImage->getQWidget()->setAttribute(Qt::WA_TranslucentBackground);
#endif
widgetImage->getQGraphicsViewAdapter()->setBackgroundColor(QColor(0, 0,
0, 0));
graphicsScene = widgetImage->getQGraphicsViewAdapter()->getQGraphicsScene();
osg::Camera* camera = 0;
osg::Geometry* quad = osg::createTexturedQuadGeometry(osg::Vec3(0,0,0),
osg::Vec3(1,0,0), osg::Vec3(0,1,0), 1, 1);
osg::StateSet* stateset = quad->getOrCreateStateSet();
stateset->setMode(GL_BLEND,osg::StateAttribute::ON);
osg::Geode* geode = new osg::Geode;
geode->addDrawable(quad);
osg::MatrixTransform* mt = new osg::MatrixTransform;
osg::Texture2D* texture = new osg::Texture2D(widgetImage.get());
texture->setResizeNonPowerOfTwoHint(false);
texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR);
texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
texture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
mt->getOrCreateStateSet()->setTextureAttributeAndModes(0, texture,
osg::StateAttribute::ON);
osgViewer::InteractiveImageHandler* handler;
camera = new osg::Camera;
camera->setProjectionResizePolicy(osg::Camera::FIXED);
camera->setProjectionMatrix(osg::Matrix::ortho2D(0,1,0,1));
//camera->setProjectionMatrixAsOrtho2D(0,1280,0,1024);
camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera->setViewMatrix(osg::Matrix::identity());
camera->setClearMask(GL_DEPTH_BUFFER_BIT);
camera->setRenderOrder(osg::Camera::POST_RENDER);
camera->addChild(geode);
camera->setViewport(x,y,width,height);
mt->addChild(camera);
handler = new osgViewer::InteractiveImageHandler(widgetImage.get(),
texture, camera);
mt->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
mt->getOrCreateStateSet()->setMode(GL_BLEND, osg::StateAttribute::ON);
mt->getOrCreateStateSet()->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
mt->getOrCreateStateSet()->setAttribute(new osg::Program);
osg::Group* overlay = new osg::Group;
overlay->addChild(mt);
quad->setEventCallback(handler);
quad->setCullCallback(handler);
scene->addChild(overlay);
Anyway, the thing I was looking for is some blocker for any keyboard press,
maybe even not through OSG but in whole C++ windows application? Like, you
know, a firewall for key events so I could "open ports" only for those I need?
Thanks for your time![/code]
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=50354#50354
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