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<p class=MsoNormal><span style='color:#1F497D'>I found a solution too. I simply
changed the name of graph method to graphblah.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>It’s a weird solution but </span>QObject.connect(self.PostGISdialog,
SIGNAL("Graph"), self.graphblah) works perfectly now. Perhaps it was
the length of the method name??<o:p></o:p></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>- Elizabeth</span><span style='font-size:12.0pt;font-family:
"Times New Roman","serif";color:#1F497D'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:#1F497D'> </span><span style='color:#1F497D'><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
qgis-developer-bounces@lists.osgeo.org
[mailto:qgis-developer-bounces@lists.osgeo.org] <b>On Behalf Of </b>Chang,
Elizabeth<br>
<b>Sent:</b> Wednesday, August 12, 2009 9:53 AM<br>
<b>To:</b> qgis-developer@lists.osgeo.org<br>
<b>Subject:</b> [Qgis-developer] problem restarting plugin<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hi,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have a plugin that works fine the first time you run it.
Then, when you try to restart the plugin, I get this error: <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Traceback (most recent call last):<o:p></o:p></p>
<p class=MsoNormal> File "C:/Documents and
Settings/m29308/.qgis//python/plugins\NoblisPostGISGraphs\NoblisPostGISGraphs.py",
line 42, in run<o:p></o:p></p>
<p class=MsoNormal> QObject.connect(self.PostGISdialog,
SIGNAL("Graph"), self.graph)<o:p></o:p></p>
<p class=MsoNormal>TypeError: argument 3 of QObject.connect() has an invalid
type<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Python version:<o:p></o:p></p>
<p class=MsoNormal>2.5.2 (r252:60911, Feb 21 2008, 13:11:45) [MSC v.1310 32 bit
(Intel)]<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I can’t figure out why it is complaining about
argument 3—self.graph is a method name and not only does it work the
first time around, other connections are also fine. The only difference is that
self.graph takes in a list.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>In PostGISdialog<o:p></o:p></p>
<p class=MsoNormal>
@pyqtSignature("on_GraphButton_clicked()")<o:p></o:p></p>
<p class=MsoNormal>
def on_GraphButton_clicked(self):<o:p></o:p></p>
<p class=MsoNormal>
tables=[]<o:p></o:p></p>
<p class=MsoNormal>
for index in xrange(self.GraphListWidget.count()):<o:p></o:p></p>
<p class=MsoNormal>
tables.append(str(self.GraphListWidget.item(index).text()))<o:p></o:p></p>
<p class=MsoNormal>
self.emit(SIGNAL("Graph(QStringList)"), QStringList(tables))<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>in PostGISGraphs<o:p></o:p></p>
<p class=MsoNormal>
def run(self): <o:p></o:p></p>
<p class=MsoNormal>
QObject.connect(self.canvas,
SIGNAL("selectionChanged(QgsMapLayer*)"), self.selectionchanged)<o:p></o:p></p>
<p class=MsoNormal>
flags = Qt.WindowTitleHint | Qt.WindowSystemMenuHint | Qt.WindowMaximizeButtonHint
# QgisGui.ModalDialogFlags<o:p></o:p></p>
<p class=MsoNormal>
self.PostGISdialog= PostGISdialog(self.iface.mainWindow(), flags)<o:p></o:p></p>
<p class=MsoNormal>
QObject.connect(self.PostGISdialog, SIGNAL("LoadScript(QString)"),
self.loadscript)<o:p></o:p></p>
<p class=MsoNormal>
QObject.connect(self.PostGISdialog, SIGNAL("ExportScript(QString,
QString)"), self.exportscript)<o:p></o:p></p>
<p class=MsoNormal>
QObject.connect(self.PostGISdialog, SIGNAL("Graph(QStringList)"),self.graph)<o:p></o:p></p>
<p class=MsoNormal>
QObject.connect(self.PostGISdialog, SIGNAL("Execute(QString)"),
self.execute)<o:p></o:p></p>
<p class=MsoNormal>
QObject.connect(self.PostGISdialog, SIGNAL("SaveConn(QString)"),
self.saveConnection)<o:p></o:p></p>
<p class=MsoNormal>
QObject.connect(self.PostGISdialog, SIGNAL("Connect(QString)"),
self.establishConnection)<o:p></o:p></p>
<p class=MsoNormal>
QObject.connect(self.PostGISdialog, SIGNAL("Disconnect(QString)"),
self.disconnectdb)<o:p></o:p></p>
<p class=MsoNormal>
QObject.connect(self.PostGISdialog, SIGNAL("GetTablesFromSchema(QString)"),
self.populateTables)<o:p></o:p></p>
<p class=MsoNormal>
self.PostGISdialog.show()<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>
def graph(self, tablesToGraph):<o:p></o:p></p>
<p class=MsoNormal>
self.tablesToGraph=list(tablesToGraph)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Does anyone have any ideas? Thanks in advance.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Elizabeth
Chang</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Lead</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Noblis</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>3150
Fairview Park Drive Sourth</span><span style='font-size:12.0pt;font-family:
"Times New Roman","serif"'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Falls
Church, VA 22042</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>703-610-2321
(office)</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>elizabeth.chang@noblis.org</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>*************************************</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Noblis</span></b><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>For
the best of reasons</span></i><o:p></o:p></p>
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