Created
April 20, 2017 13:35
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Why does the setter trigger multiple times.
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import sys | |
from PyQt5 import QtCore, QtQml | |
from PyQt5.QtWidgets import QApplication | |
class CustomType(QtCore.QObject): | |
names_changed = QtCore.pyqtSignal() | |
def __init__(self, parent = None): | |
super().__init__(parent) | |
self._names = [] | |
self._times_in_setter = 0 | |
@QtCore.pyqtProperty(QtCore.QVariant, notify = names_changed) | |
def names(self): | |
return self._names | |
@names.setter | |
def names(self, names): | |
names_list = names.toVariant() | |
# if names_list == self._names: | |
# return | |
self._times_in_setter += 1 | |
self._names = names_list | |
print(names) | |
print("objectName: ", self.objectName()) | |
print("names: ", self._names) | |
print("Times in setter: ", self._times_in_setter) | |
print() | |
self.names_changed.emit() | |
QML = b""" | |
import QtQuick 2.7 | |
import QtQuick.Controls 1.4 | |
import CustomType 1.0 | |
ApplicationWindow { | |
visible: true | |
width: 640 | |
height: 480 | |
Column { | |
ComboBox { | |
model: customType.names | |
} | |
ComboBox { | |
model: customType2.names | |
} | |
} | |
CustomType { | |
id: customType | |
objectName: "customType" | |
names: ["one", "two"] | |
} | |
CustomType { | |
id: customType2 | |
objectName: "customType2" | |
names: customType.names | |
} | |
} | |
""" | |
app = QApplication(sys.argv) | |
QtQml.qmlRegisterType(CustomType, 'CustomType', 1, 0, 'CustomType') | |
engine = QtQml.QQmlApplicationEngine() | |
engine.loadData(QML) | |
app.exec_() |
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