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Diffstat (limited to 'examples/qml/tutorials/extending-qml-advanced/advanced6-Property-value-source/happybirthdaysong.py')
-rw-r--r-- | examples/qml/tutorials/extending-qml-advanced/advanced6-Property-value-source/happybirthdaysong.py | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/examples/qml/tutorials/extending-qml-advanced/advanced6-Property-value-source/happybirthdaysong.py b/examples/qml/tutorials/extending-qml-advanced/advanced6-Property-value-source/happybirthdaysong.py new file mode 100644 index 000000000..c35f9bffa --- /dev/null +++ b/examples/qml/tutorials/extending-qml-advanced/advanced6-Property-value-source/happybirthdaysong.py @@ -0,0 +1,49 @@ +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +from PySide6.QtCore import QTimer, Property, Signal, Slot +from PySide6.QtQml import QmlElement, QPyQmlPropertyValueSource + +# To be used on the @QmlElement decorator +# (QML_IMPORT_MINOR_VERSION is optional) +QML_IMPORT_NAME = "People" +QML_IMPORT_MAJOR_VERSION = 1 + + +@QmlElement +class HappyBirthdaySong(QPyQmlPropertyValueSource): + name_changed = Signal() + + def __init__(self, parent=None): + super().__init__(parent) + + self.m_target = None + self.m_name = "" + self.m_line = -1 + self.m_lyrics = [] + + self.m_timer = QTimer(self) + self.m_timer.timeout.connect(self.advance) + self.m_timer.start(1000) + + def setTarget(self, property): + self.m_target = property + + @Property(str, notify=name_changed, final=True) + def name(self): + return self.m_name + + @name.setter + def name(self, n): + if self.m_name != n: + self.m_name = n + self.m_lyrics = ["Happy birthday to you,", + "Happy birthday to you,", + f"Happy birthday dear {self.m_name},", + "Happy birthday to you!", + ""] + + @Slot() + def advance(self): + self.m_line = (self.m_line + 1) % len(self.m_lyrics) + self.m_target.write(self.m_lyrics[self.m_line]) |