我注意到QML可以使用Connections对象接收Python发出的信号。不幸的是,我无法弄清楚如何让该对象接收该信号的参数。
我创建了一个最小化的测试用例来演示我的意图:
min.py
我创建了一个最小化的测试用例来演示我的意图:
min.py
from PySide import QtCore, QtGui, QtDeclarative
import sys
# init Qt
app = QtGui.QApplication(sys.argv)
# set up the signal
class Signaller(QtCore.QObject):
emitted = QtCore.Signal(str)
signaller = Signaller()
# Load the QML
qt_view = QtDeclarative.QDeclarativeView()
context = qt_view.rootContext()
context.setContextProperty('signaller', signaller)
qt_view.setResizeMode(QtDeclarative.QDeclarativeView.SizeRootObjectToView)
qt_view.setSource('min.qml')
qt_view.show()
# launch the signal
signaller.emitted.emit("Please display THIS text!")
# Run!
app.exec_()
并且 min.qml
import QtQuick 1.0
Rectangle {
width:300; height:100
Text {
id: display
text: "No signal yet detected!"
Connections {
target: signaller
onEmitted: {
display.text = "???" //how to get the argument?
}
}
}
}