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#!/usr/bin/env python
from PySide2 import QtCore, QtGui
def createItem(minimum, preferred, maximum, name):
w = QtGui.QGraphicsProxyWidget()
w.setWidget(QtGui.QPushButton(name))
w.setMinimumSize(minimum)
w.setPreferredSize(preferred)
w.setMaximumSize(maximum)
w.setSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Preferred)
return w
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
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)
l.addAnchor(d, QtCore.Qt.AnchorBottom, l, QtCore.Qt.AnchorBottom)
l.addAnchor(e, QtCore.Qt.AnchorBottom, l, QtCore.Qt.AnchorBottom)
l.addAnchor(c, QtCore.Qt.AnchorTop, f, QtCore.Qt.AnchorTop)
l.addAnchor(c, QtCore.Qt.AnchorVerticalCenter, f, QtCore.Qt.AnchorBottom)
l.addAnchor(f, QtCore.Qt.AnchorBottom, g, QtCore.Qt.AnchorTop)
l.addAnchor(c, QtCore.Qt.AnchorBottom, g, QtCore.Qt.AnchorBottom)
# Horizontal.
l.addAnchor(l, QtCore.Qt.AnchorLeft, a, QtCore.Qt.AnchorLeft)
l.addAnchor(l, QtCore.Qt.AnchorLeft, d, QtCore.Qt.AnchorLeft)
l.addAnchor(a, QtCore.Qt.AnchorRight, b, QtCore.Qt.AnchorLeft)
l.addAnchor(a, QtCore.Qt.AnchorRight, c, QtCore.Qt.AnchorLeft)
l.addAnchor(c, QtCore.Qt.AnchorRight, e, QtCore.Qt.AnchorLeft)
l.addAnchor(b, QtCore.Qt.AnchorRight, l, QtCore.Qt.AnchorRight)
l.addAnchor(e, QtCore.Qt.AnchorRight, l, QtCore.Qt.AnchorRight)
l.addAnchor(d, QtCore.Qt.AnchorRight, e, QtCore.Qt.AnchorLeft)
l.addAnchor(l, QtCore.Qt.AnchorLeft, f, QtCore.Qt.AnchorLeft)
l.addAnchor(l, QtCore.Qt.AnchorLeft, g, QtCore.Qt.AnchorLeft)
l.addAnchor(f, QtCore.Qt.AnchorRight, g, QtCore.Qt.AnchorRight)
scene.addItem(w)
scene.setBackgroundBrush(QtCore.Qt.darkGreen)
view = QtGui.QGraphicsView(scene)
view.show()
sys.exit(app.exec_())
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