I have been trying to call a method by BOTH a key shortcut (as described here http://www.qgis.org/en/docs/pyqgis_developer_cookbook/snippets.html) and a button I created on the toolbar.

The button works but when I add the code for the shortcut, nothing happens.

def initGui(self):
  # Code for the button
  self.my_action = QAction(QIcon(":/path/to/the/icon.png"), u"toolName", self.iface.mainWindow())

  # Code for the shortcut
  self.iface.registerMainWindowAction(self.my_action, "Ctrl+1")
  QObject.connect(self.my_action, SIGNAL("triggered()"),self.myFunction)

def unload(self):
  # Unload the button

  # Unload the shortcut

def myFunction(self):

Can anybody tell me where (and how) to put the code explained in the link?




I don't know about my system (if other shortcuts work, I don't see why those set on my tools shouldn't) and as far as my code it is pretty straightforward: in the initGui method I set up the buttons (what I shared is a "place holder" for the real path of the icons. However, I can see them on both the toolbar and the settings form and everything works fine when clicking the buttons) add them to the toolbar; the unload method, unloads them (see the code above WITHOUT the redundant signal/slot connection as dakcarto pointed out in the comment); the run method sets up the environment (it points at the table -- I am editing a PostGIS table -- and starts an editing session + some tuning)

def run(self):
        # Reference to the layer
        active_layer = self.iface.activeLayer()
        # If vector type load a qml file from plugin dir
        if active_layer.type() == QgsMapLayer.VectorLayer:
              dirPlug = os.path.dirname(os.path.abspath(__file__))
        # Start editing session
        # Set CRS and zoom to extent
        canvas = self.iface.mapCanvas()
        # Refresh          
        QMessageBox.warning(self.iface.mainWindow(),'WARNING','Please, make sure to select a valid shapefile in the TOC')

Then I have four buttons calling four identical methods that change values in three different fields of selected features (they differ from each other only for the values they are writing into the DB). Everything works fine when using buttons! I just can't connect a shortcut to them! One of these methods:

def oneOfThem(self):
        # Reference to the layer
        active_layer = self.iface.activeLayer()
        # selected features
        sel = active_layer.selectedFeatures()
        # datetime now
        now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M %S")
        # username
        user = getpass.getuser()
        # if something is selected
        if sel:
            # Change values for selected features
            for s in sel:
                selID = s.id()
                selUser = s.fieldNameIndex('user_lbl')
                selRat = s.fieldNameIndex('rating')
                selTime = s.fieldNameIndex('tile_done_')

                active_layer.changeAttributeValue(selID, selUser, user)
                active_layer.changeAttributeValue(selID, selRat, 1)
                active_layer.changeAttributeValue(selID, selTime, now)

            self.iface.messageBar().pushMessage("Info","Message.", QgsMessageBar.INFO, 3)
            self.iface.messageBar().pushMessage("WARNING","No features selected", QgsMessageBar.WARNING, 3)
        QMessageBox.warning(self.iface.mainWindow(),'WARNING','Please, make sure to select a valid shapefile in the TOC')

That's pretty much it! I didn't touch the _init_ method and I only added my code to the one coming from the Plugin Builder Plugin.


1 Answer 1


You have a redundant signal/slot connection:

def initGui(self):
  # Code for the button
  self.my_action = QAction(QIcon(":/path/to/the/icon.png"), u"toolName", self.iface.mainWindow())
  # Code for the shortcut
  self.iface.registerMainWindowAction(self.my_action, "Ctrl+1")
  self.my_action.triggered.connect(self.myFunction)  # only need this new-style connection

  # duplicate old-style connection
  # QObject.connect(self.my_action, SIGNAL("triggered()"),self.myFunction)

See if removing the duplicate helps. Also, try a different, unique key sequence in case there is a conflict with the "Ctrl+1" sequence.

Also, check Settings -> Configure shortcuts dialog to see if your registered QAction and key sequence are showing up.

  • Thanks @dakcarto! I check this page for finding conflicts Features at a Glance and, yes, Settings->Configure shortcuts shows the registered QAction with the associated key sequence but it still not working (is that possible? The tool works when clicking the icon on the toolbar and the chosen key sequence doesn't seem to conflict with any other sequence)
    – mic
    Mar 7, 2014 at 9:13
  • Hmm. I don't have any issue here using this code. Shortcut just works for me. Try editing an existing plugin (one without a shortcut), and add a shortcut to it. Then see if it functions correctly. If not, try overriding the shortcut in Configure shortcuts and see if the new shortcut works. What version of QGIS are you using?
    – dakcarto
    Mar 9, 2014 at 17:13
  • Adding a shortcut to an existing plugin works but overriding the shortcut of mine from Settings did not! I'm using Valmiera (2.2.0). I honestly don't know what's wrong with the code. What else could cause this malfunction?
    – mic
    Mar 10, 2014 at 8:25
  • Other than something installed on your system that is interrupting shortcuts, I can only surmise that your plugin code has some other issue not displayed here. Can you share the plugin code? Maybe as a link in a comment. Also, is the icon's resource path really ':/path/to/the/icon.png', or is that just sample code?
    – dakcarto
    Mar 10, 2014 at 16:48
  • Please, see EDIT#1 above
    – mic
    Mar 11, 2014 at 9:45

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