1#!/usr/bin/env python 2 3 4############################################################################# 5## 6## Copyright (C) 2013 Riverbank Computing Limited. 7## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). 8## All rights reserved. 9## 10## This file is part of the examples of PyQt. 11## 12## $QT_BEGIN_LICENSE:BSD$ 13## You may use this file under the terms of the BSD license as follows: 14## 15## "Redistribution and use in source and binary forms, with or without 16## modification, are permitted provided that the following conditions are 17## met: 18## * Redistributions of source code must retain the above copyright 19## notice, this list of conditions and the following disclaimer. 20## * Redistributions in binary form must reproduce the above copyright 21## notice, this list of conditions and the following disclaimer in 22## the documentation and/or other materials provided with the 23## distribution. 24## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor 25## the names of its contributors may be used to endorse or promote 26## products derived from this software without specific prior written 27## permission. 28## 29## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." 40## $QT_END_LICENSE$ 41## 42############################################################################# 43 44 45from PyQt5.QtCore import QSizeF, Qt 46from PyQt5.QtWidgets import (QApplication, QGraphicsAnchorLayout, 47 QGraphicsProxyWidget, QGraphicsScene, QGraphicsView, QGraphicsWidget, 48 QPushButton, QSizePolicy) 49 50 51def createItem(minimum, preferred, maximum, name): 52 w = QGraphicsProxyWidget() 53 54 w.setWidget(QPushButton(name)) 55 w.setMinimumSize(minimum) 56 w.setPreferredSize(preferred) 57 w.setMaximumSize(maximum) 58 w.setSizePolicy(QSizePolicy.Preferred, QSizePolicy.Preferred) 59 60 return w 61 62 63if __name__ == '__main__': 64 65 import sys 66 67 app = QApplication(sys.argv) 68 69 scene = QGraphicsScene() 70 scene.setSceneRect(0, 0, 800, 480) 71 72 minSize = QSizeF(30, 100) 73 prefSize = QSizeF(210, 100) 74 maxSize = QSizeF(300, 100) 75 76 a = createItem(minSize, prefSize, maxSize, "A") 77 b = createItem(minSize, prefSize, maxSize, "B") 78 c = createItem(minSize, prefSize, maxSize, "C") 79 d = createItem(minSize, prefSize, maxSize, "D") 80 e = createItem(minSize, prefSize, maxSize, "E") 81 f = createItem(QSizeF(30, 50), QSizeF(150, 50), maxSize, "F") 82 g = createItem(QSizeF(30, 50), QSizeF(30, 100), maxSize, "G") 83 84 l = QGraphicsAnchorLayout() 85 l.setSpacing(0) 86 87 w = QGraphicsWidget(None, Qt.Window) 88 w.setPos(20, 20) 89 w.setLayout(l) 90 91 # Vertical. 92 l.addAnchor(a, Qt.AnchorTop, l, Qt.AnchorTop) 93 l.addAnchor(b, Qt.AnchorTop, l, Qt.AnchorTop) 94 95 l.addAnchor(c, Qt.AnchorTop, a, Qt.AnchorBottom) 96 l.addAnchor(c, Qt.AnchorTop, b, Qt.AnchorBottom) 97 l.addAnchor(c, Qt.AnchorBottom, d, Qt.AnchorTop) 98 l.addAnchor(c, Qt.AnchorBottom, e, Qt.AnchorTop) 99 100 l.addAnchor(d, Qt.AnchorBottom, l, Qt.AnchorBottom) 101 l.addAnchor(e, Qt.AnchorBottom, l, Qt.AnchorBottom) 102 103 l.addAnchor(c, Qt.AnchorTop, f, Qt.AnchorTop) 104 l.addAnchor(c, Qt.AnchorVerticalCenter, f, Qt.AnchorBottom) 105 l.addAnchor(f, Qt.AnchorBottom, g, Qt.AnchorTop) 106 l.addAnchor(c, Qt.AnchorBottom, g, Qt.AnchorBottom) 107 108 # Horizontal. 109 l.addAnchor(l, Qt.AnchorLeft, a, Qt.AnchorLeft) 110 l.addAnchor(l, Qt.AnchorLeft, d, Qt.AnchorLeft) 111 l.addAnchor(a, Qt.AnchorRight, b, Qt.AnchorLeft) 112 113 l.addAnchor(a, Qt.AnchorRight, c, Qt.AnchorLeft) 114 l.addAnchor(c, Qt.AnchorRight, e, Qt.AnchorLeft) 115 116 l.addAnchor(b, Qt.AnchorRight, l, Qt.AnchorRight) 117 l.addAnchor(e, Qt.AnchorRight, l, Qt.AnchorRight) 118 l.addAnchor(d, Qt.AnchorRight, e, Qt.AnchorLeft) 119 120 l.addAnchor(l, Qt.AnchorLeft, f, Qt.AnchorLeft) 121 l.addAnchor(l, Qt.AnchorLeft, g, Qt.AnchorLeft) 122 l.addAnchor(f, Qt.AnchorRight, g, Qt.AnchorRight) 123 124 scene.addItem(w) 125 scene.setBackgroundBrush(Qt.darkGreen) 126 127 view = QGraphicsView(scene) 128 view.show() 129 130 sys.exit(app.exec_()) 131