Cfrgtkky

I'm using pyqt5 to make a Qgis 3.4 plugin, this plugin is supposed to load pair o layers and zoom to the selected one, but the code executes too fast and passes the zooming line before the layers are loaded into Qgis.

the code is the following:

def openFileNameDialog(self):



    options = QFileDialog.Options()

    options |= QFileDialog.DontUseNativeDialog

    fileName, _ = QFileDialog.getOpenFileName(self,"QFileDialog.getOpenFileName()", "","All Files (*);;Shapefile's (*.shp)", options=options)

    if fileName:

        shape_name = fileName



    shapelayer = QgsVectorLayer(shape_name, "project's shapefile", "ogr")

    if not shapelayer:

      self.statusBar().showMessage('shapefile is invalid')



    else:





        urlWithParams = 'url=urltoBaseMap'



        rlayer = QgsRasterLayer(urlWithParams, 'BaseMap', 'wms')



        if not rlayer.isValid():

            self.statusBar().showMessage('Layer failed to load!')



        QgsProject.instance().addMapLayer(rlayer)

        QgsProject.instance().addMapLayer(shapelayer)



        self.iface.setActiveLayer(shapelayer)



def layerzoom(self):



    self.iface.zoomToActiveLayer()



def runboth(self):



    self.openFileNameDialog()

    #time.sleep(5)

    self.layerzoom()

how could I call a function to zoom after the function that loads the layers finishes the layers' loading?

I've tried time.sleep() but it doesn't wait for openFileNameFialog() to finish so the problem presist.

Adding these two lines to the code it was possible to wait for the layer load to zoomIn, thanks to eyllanesc and ekhumoro for the guidence

def stop_signal():  self.layeropen()

self.iface.mapCanvas().renderComplete.connect(stop_signal)

the code would look like this:

def openFileNameDialog(self):



    options = QFileDialog.Options()

    options |= QFileDialog.DontUseNativeDialog

    fileName, _ = QFileDialog.getOpenFileName(self,"QFileDialog.getOpenFileName()", "","All Files (*);;Shapefile's (*.shp)", options=options)

    if fileName:

        shape_name = fileName



    shapelayer = QgsVectorLayer(shape_name, "project's shapefile", "ogr")

    if not shapelayer:

      self.statusBar().showMessage('shapefile is invalid')



    else:





        urlWithParams = 'url=urltoBaseMap'



        rlayer = QgsRasterLayer(urlWithParams, 'BaseMap', 'wms')



        if not rlayer.isValid():

            self.statusBar().showMessage('Layer failed to load!')

        def stop_signal():  

            self.layeropen()

            self.istft = 'yes'



        QgsProject.instance().addMapLayer(rlayer)

        QgsProject.instance().addMapLayer(shapelayer)



        self.iface.mapCanvas().renderComplete.connect(stop_signal)



def layerzoom(self):

    if self.istft == 'yes':

        self.iface.zoomToActiveLayer()

    if self.istft != 'yes':

        pass



def mainprocess(self):



    self.istft = None