1#!/usr/bin/env python
2
3
4#############################################################################
5##
6## Copyright (C) 2013 Riverbank Computing Limited.
7## Copyright (C) 2013 Digia Plc 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
45import sys
46
47from PyQt5.QtCore import (pyqtProperty, Q_CLASSINFO, QCoreApplication, QObject,
48        QUrl)
49from PyQt5.QtQml import (qmlRegisterType, QQmlComponent, QQmlEngine,
50        QQmlListProperty)
51
52
53QML = b'''
54import People 1.0
55
56BirthdayParty {
57    host: Boy {
58        name: "Bob Jones"
59        shoeSize: 12
60    }
61
62    Boy { name: "Leo Hodges" }
63    Boy { name: "Jack Smith" }
64    Girl { name: "Anne Brown" }
65}
66'''
67
68
69class Person(QObject):
70    def __init__(self, parent=None):
71        super(Person, self).__init__(parent)
72
73        self._name = ''
74        self._shoeSize = 0
75
76    @pyqtProperty(str)
77    def name(self):
78        return self._name
79
80    @name.setter
81    def name(self, name):
82        self._name = name
83
84    @pyqtProperty(int)
85    def shoeSize(self):
86        return self._shoeSize
87
88    @shoeSize.setter
89    def shoeSize(self, shoeSize):
90        self._shoeSize = shoeSize
91
92
93class Boy(Person):
94    pass
95
96
97class Girl(Person):
98    pass
99
100
101class BirthdayParty(QObject):
102    Q_CLASSINFO('DefaultProperty', 'guests')
103
104    def __init__(self, parent=None):
105        super(BirthdayParty, self).__init__(parent)
106
107        self._host = None
108        self._guests = []
109
110    @pyqtProperty(Person)
111    def host(self):
112        return self._host
113
114    @host.setter
115    def host(self, host):
116        self._host = host
117
118    @pyqtProperty(QQmlListProperty)
119    def guests(self):
120        return QQmlListProperty(Person, self, self._guests)
121
122
123app = QCoreApplication(sys.argv)
124
125qmlRegisterType(BirthdayParty, "People", 1, 0, "BirthdayParty")
126qmlRegisterType(Person)
127qmlRegisterType(Boy, "People", 1, 0, "Boy")
128qmlRegisterType(Girl, "People", 1, 0, "Girl")
129
130engine = QQmlEngine()
131
132component = QQmlComponent(engine)
133component.setData(QML, QUrl())
134
135party = component.create()
136
137if party is not None and party.host is not None:
138    print("\"%s\" is having a birthday!" % party.host.name)
139
140    if isinstance(party.host, Boy):
141        print("He is inviting:")
142    else:
143        print("She is inviting:")
144
145    for guest in party.guests:
146        print("    \"%s\"" % guest.name)
147else:
148    for e in component.errors():
149        print("Error:", e.toString());
150