From Jeremy Moles, import of the osgWidget NodeKit, sourced from the original http://osgwidget.googlecode.com/svn/trunk

Notes from Robert Osfield, I've merged osgWidget trunk, and added/changed CMakeLists.txt file to make it suitable for inclusion in the core OSG, and moved imagery/scripts/shaders out into OpenSceneGraph-Data

src/osgWidget/Canvas.cpp

@@ -0,0 +1,32 @@
+// -*-c++-*- osgWidget - Code by: Jeremy Moles (cubicool) 2007-2008
+// $Id: Canvas.cpp 66 2008-07-14 21:54:09Z cubicool $
+
+#include <osgWidget/Canvas>
+
+namespace osgWidget {
+
+Canvas::Canvas(const std::string& name):
+Window(name) {
+}
+
+Canvas::Canvas(const Canvas& canvas, const osg::CopyOp& co):
+Window(canvas, co) {
+}
+
+void Canvas::_resizeImplementation(point_type w, point_type h) {
+	// A Canvas has no layout, so it doesn't really know how to honor a resize
+	// request. :) The best I could do here is store the differences and add them
+	// later to the calls to getWidth/getHeight.
+}
+
+bool Canvas::addWidget(Widget* widget, point_type x, point_type y) {
+	if(Window::addWidget(widget)) {
+		widget->setOrigin(x, y);
+
+		return true;
+	}
+
+	return false;
+}
+
+}