// if there is a scene and it's the outmost scene, get current 3D range const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(mpScene->GetViewContact()); const basegfx::B3DRange aAllContentRange(rVCScene.getAllContentRange3D());
if(aAllContentRange.isEmpty())
{ // no content, nothing to do
mpScene = nullptr;
} else
{ // secure current 3D transformation stack
mpViewInformation3D = rVCScene.getViewInformation3D(aAllContentRange);
}
}
// after changing parts of the scene, use the secured last 3d transformation stack and the new content // range to calculate a new, eventually expanded or shrunk, 2D geometry for the scene and apply it. // Get new content range const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(mpScene->GetViewContact());
basegfx::B3DRange aAllContentRange(rVCScene.getAllContentRange3D());
// only change when there is still content; else let scene stay at old SnapRect if(aAllContentRange.isEmpty()) return;
// check if object transform of scene has changed if(mpViewInformation3D->getObjectTransformation() != mpScene->GetTransform())
{ // If Yes, it needs to be updated since it's - for historical reasons - // part of the basic 3d transformation stack of the scene
mpViewInformation3D = drawinglayer::geometry::ViewInformation3D(
mpScene->GetTransform(), // replace object transformation with new local transform
mpViewInformation3D->getOrientation(),
mpViewInformation3D->getProjection(),
mpViewInformation3D->getDeviceToView(),
mpViewInformation3D->getViewTime(),
mpViewInformation3D->getExtendedInformationSequence());
}
// transform content range to scene-relative coordinates using old 3d transformation stack
aAllContentRange.transform(mpViewInformation3D->getObjectToView());
// set as new SnapRect and invalidate bound volume if(mpScene->GetSnapRect() != aNewSnapRect)
{
mpScene->SetSnapRect(aNewSnapRect);
mpScene->InvalidateBoundVolume();
}
}
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