scene = QtGui.QGraphicsScene()
scene.setSceneRect(0, 0, 800, 480)
minSize = QtCore.QSizeF(30, 100)
prefSize = QtCore.QSizeF(210, 100)
maxSize = QtCore.QSizeF(300, 100)
a = createItem(minSize, prefSize, maxSize, "A")
b = createItem(minSize, prefSize, maxSize, "B")
c = createItem(minSize, prefSize, maxSize, "C")
d = createItem(minSize, prefSize, maxSize, "D")
e = createItem(minSize, prefSize, maxSize, "E")
f = createItem(QtCore.QSizeF(30, 50), QtCore.QSizeF(150, 50), maxSize, "F")
g = createItem(QtCore.QSizeF(30, 50), QtCore.QSizeF(30, 100), maxSize, "G")
l = QtGui.QGraphicsAnchorLayout()
l.setSpacing(0)
w = QtGui.QGraphicsWidget(None, QtCore.Qt.Window)
w.setPos(20, 20)
w.setLayout(l)
# Vertical.
l.addAnchor(a, QtCore.Qt.AnchorTop, l, QtCore.Qt.AnchorTop)
l.addAnchor(b, QtCore.Qt.AnchorTop, l, QtCore.Qt.AnchorTop)
l.addAnchor(c, QtCore.Qt.AnchorTop, a, QtCore.Qt.AnchorBottom)
l.addAnchor(c, QtCore.Qt.AnchorTop, b, QtCore.Qt.AnchorBottom)
l.addAnchor(c, QtCore.Qt.AnchorBottom, d, QtCore.Qt.AnchorTop)
l.addAnchor(c, QtCore.Qt.AnchorBottom, e, QtCore.Qt.AnchorTop)
