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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# |
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# Study of signaling from QML to Python and back to QML. |
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# The third signal "sc" to slot "s3" emits a signal with an url |
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# that the webkit view opens. |
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import sys, signal |
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|
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from PySide import QtGui, QtCore |
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from PySide.QtDeclarative import QDeclarativeView |
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|
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|
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class Po(QtCore.QObject): |
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def __init__(self): |
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QtCore.QObject.__init__(self) |
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|
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@QtCore.Slot() |
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def s1(self): |
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self._echo('S1: This is called without any argument') |
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|
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@QtCore.Slot(int) |
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def s2(self,i): |
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self._echo('S2: This is called with the number "%d"'%i) |
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|
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@QtCore.Slot('QString') |
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def s3(self,s): |
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self._echo('S3: This is called with a string: %s'%s) |
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url = 'http://pyside.org' |
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self.url_to_qml.emit(url) |
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|
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def _echo(self,s): |
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QtGui.QMessageBox.information(None, "Info", s) |
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print s |
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|
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url_to_qml = QtCore.Signal('QVariant') |
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|
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|
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if __name__ == "__main__": |
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# initiate the main QML application |
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app = QtGui.QApplication(sys.argv) |
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view = QDeclarativeView() |
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view.setResizeMode(QDeclarativeView.SizeRootObjectToView) |
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|
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ctx = view.rootContext() |
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# set html content |
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ctx.setContextProperty("htmlContent", "press the button to trigger signals from QML") |
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|
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url = QtCore.QUrl('webview.qml') |
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view.setSource(url) |
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|
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po=Po() |
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root = view.rootObject() |
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|
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QtCore.QObject.connect( |
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root, QtCore.SIGNAL('sa()'), |
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po, QtCore.SLOT('s1()')) |
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QtCore.QObject.connect( |
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root, QtCore.SIGNAL('sb(int)'), |
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po, QtCore.SLOT('s2(int)')) |
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QtCore.QObject.connect( |
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root, QtCore.SIGNAL('sc(QString)'), |
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po, QtCore.SLOT('s3(QString)')) |
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QtCore.QObject.connect( |
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po, QtCore.SIGNAL('url_to_qml(QVariant)'), |
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root, QtCore.SLOT('dataReceived(QVariant)')) |
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|
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view.show() |
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|
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# ensure that the application quits using CTRL-C |
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signal.signal(signal.SIGINT, signal.SIG_DFL) |
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|
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# bring the app up front on OS X |
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view.raise_() |
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|
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# execute |
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sys.exit(app.exec_()) |
