I'm using the plugin builder to develop a plugin QGIS. I want the fields of the selected layer in combobox_1 to appear in combobox_2.

I am new to python and PyQGIS. I do not have the methods defined in initGUI. How can I achieve this?

def initGui(self):
    """Create the menu entries and toolbar icons inside the QGIS GUI."""

    icon_path = ':/plugins/TheWorkflow/icon.png'
    self.add_action(
        icon_path,
        text=self.tr(u'The Workflow'),
        callback=self.run,
        parent=self.iface.mainWindow())

def unload(self):
    """Removes the plugin menu item and icon from QGIS GUI."""
    for action in self.actions:
        self.iface.removePluginVectorMenu(
            self.tr(u'&The Workflow'),
            action)
        self.iface.removeToolBarIcon(action)
    # remove the toolbar
    del self.toolbar

def run(self):
    """Run method that performs all the real work"""
    # show the dialog
    self.dlg.show()
    # Run the dialog event loop
    result = self.dlg.exec_()
    # See if OK was pressed
    if result:
        # Do something useful here - delete the line containing pass and
        # substitute with your code.
        pass
    

I'm using the plugin builder to develop a plugin QGIS. I want the fields of the selected layer in combobox_1 to appear in combobox_5and fields of the selected layer in comboBox_2 to appear in comboBox_3 and comboBox_4.

I am new to python and PyQGIS. I do not have the methods defined in initGUI. How can I achieve this?

def initGui(self):
    """Create the menu entries and toolbar icons inside the QGIS GUI."""

    icon_path = ':/plugins/TheWorkflow/icon.png'
    self.add_action(
        icon_path,
        text=self.tr(u'The Workflow'),
        callback=self.run,
        parent=self.iface.mainWindow())

def unload(self):
    """Removes the plugin menu item and icon from QGIS GUI."""
    for action in self.actions:
        self.iface.removePluginVectorMenu(
            self.tr(u'&The Workflow'),
            action)
        self.iface.removeToolBarIcon(action)
    # remove the toolbar
    del self.toolbar

def run(self):
    """Run method that performs all the real work"""
    # show the dialog
    self.dlg.show()
    # Run the dialog event loop
    result = self.dlg.exec_()
    # See if OK was pressed
    if result:
        # Do something useful here - delete the line containing pass and
        # substitute with your code.
        pass
    

I'm using builer plugin to develop a plug-in qgis.

  I want the fields of the selected layer in combobox_1, appears on combobox_2

I am new to python and pyqqis.

  I do not have the methods defined in initGUI

how do I do?

-- coding: utf-8 --

""" /*************************************************************************** TheWorkflow A QGIS plugin This plugin has the function of generating the network flows between objects ------------------- begin : 2016-10-18 git sha : $Format:%H$ copyright : (C) 2016 by Robson Brandão email : [email protected] ***************************************************************************/

/***************************************************************************

•                                                                     *
  

• This program is free software; you can redistribute it and/or modify *
• it under the terms of the GNU General Public License as published by *
• the Free Software Foundation; either version 2 of the License, or *
• (at your option) any later version. *

•                                                                     *
  

***************************************************************************/ """ from PyQt4.QtCore import QSettings, QTranslator, qVersion, QCoreApplication from PyQt4.QtGui import QAction, QIcon

Initialize Qt resources from file resources.py

import resources

Import the code for the dialog

from the_workflow_dialog import TheWorkflowDialog import os.path

class TheWorkflow: """QGIS Plugin Implementation."""

def __init__(self, iface):
    """Constructor.

    :param iface: An interface instance that will be passed to this class
        which provides the hook by which you can manipulate the QGIS
        application at run time.
    :type iface: QgsInterface
    """
    # Save reference to the QGIS interface
    self.iface = iface
    # initialize plugin directory
    self.plugin_dir = os.path.dirname(__file__)
    # initialize locale
    locale = QSettings().value('locale/userLocale')[0:2]
    locale_path = os.path.join(
        self.plugin_dir,
        'i18n',
        'TheWorkflow_{}.qm'.format(locale))

    if os.path.exists(locale_path):
        self.translator = QTranslator()
        self.translator.load(locale_path)

        if qVersion() > '4.3.3':
            QCoreApplication.installTranslator(self.translator)


    # Declare instance attributes
    self.actions = []
    self.menu = self.tr(u'&The Workflow')
    # TODO: We are going to let the user set this up in a future iteration
    self.toolbar = self.iface.addToolBar(u'TheWorkflow')
    self.toolbar.setObjectName(u'TheWorkflow')

# noinspection PyMethodMayBeStatic
def tr(self, message):
    """Get the translation for a string using Qt translation API.

    We implement this ourselves since we do not inherit QObject.

    :param message: String for translation.
    :type message: str, QString

    :returns: Translated version of message.
    :rtype: QString
    """
    # noinspection PyTypeChecker,PyArgumentList,PyCallByClass
    return QCoreApplication.translate('TheWorkflow', message)


def add_action(
    self,
    icon_path,
    text,
    callback,
    enabled_flag=True,
    add_to_menu=True,
    add_to_toolbar=True,
    status_tip=None,
    whats_this=None,
    parent=None):
    """Add a toolbar icon to the toolbar.

    :param icon_path: Path to the icon for this action. Can be a resource
        path (e.g. ':/plugins/foo/bar.png') or a normal file system path.
    :type icon_path: str

    :param text: Text that should be shown in menu items for this action.
    :type text: str

    :param callback: Function to be called when the action is triggered.
    :type callback: function

    :param enabled_flag: A flag indicating if the action should be enabled
        by default. Defaults to True.
    :type enabled_flag: bool

    :param add_to_menu: Flag indicating whether the action should also
        be added to the menu. Defaults to True.
    :type add_to_menu: bool

    :param add_to_toolbar: Flag indicating whether the action should also
        be added to the toolbar. Defaults to True.
    :type add_to_toolbar: bool

    :param status_tip: Optional text to show in a popup when mouse pointer
        hovers over the action.
    :type status_tip: str

    :param parent: Parent widget for the new action. Defaults None.
    :type parent: QWidget

    :param whats_this: Optional text to show in the status bar when the
        mouse pointer hovers over the action.

    :returns: The action that was created. Note that the action is also
        added to self.actions list.
    :rtype: QAction
    """

    # Create the dialog (after translation) and keep reference
    self.dlg = TheWorkflowDialog()

    icon = QIcon(icon_path)
    action = QAction(icon, text, parent)
    action.triggered.connect(callback)
    action.setEnabled(enabled_flag)

    if status_tip is not None:
        action.setStatusTip(status_tip)

    if whats_this is not None:
        action.setWhatsThis(whats_this)

    if add_to_toolbar:
        self.toolbar.addAction(action)

    if add_to_menu:
        self.iface.addPluginToVectorMenu(
            self.menu,
            action)

    self.actions.append(action)

    return action

def initGui(self):
    """Create the menu entries and toolbar icons inside the QGIS GUI."""

    icon_path = ':/plugins/TheWorkflow/icon.png'
    self.add_action(
        icon_path,
        text=self.tr(u'The Workflow'),
        callback=self.run,
        parent=self.iface.mainWindow())
 

def unload(self):
    """Removes the plugin menu item and icon from QGIS GUI."""
    for action in self.actions:
        self.iface.removePluginVectorMenu(
            self.tr(u'&The Workflow'),
            action)
        self.iface.removeToolBarIcon(action)
    # remove the toolbar
    del self.toolbar
 

def run(self):
    """Run method that performs all the real work"""
    # show the dialog
    self.dlg.show()
    # Run the dialog event loop
    result = self.dlg.exec_()
    # See if OK was pressed
    if result:
        # Do something useful here - delete the line containing pass and
        # substitute with your code.
        pass

I'm using the plugin builder to develop a plugin QGIS. I want the fields of the selected layer in combobox_1 to appear in combobox_2.

I am new to python and PyQGIS. I do not have the methods defined in initGUI. How can I achieve this?

def initGui(self):
    """Create the menu entries and toolbar icons inside the QGIS GUI."""

    icon_path = ':/plugins/TheWorkflow/icon.png'
    self.add_action(
        icon_path,
        text=self.tr(u'The Workflow'),
        callback=self.run,
        parent=self.iface.mainWindow())

def unload(self):
    """Removes the plugin menu item and icon from QGIS GUI."""
    for action in self.actions:
        self.iface.removePluginVectorMenu(
            self.tr(u'&The Workflow'),
            action)
        self.iface.removeToolBarIcon(action)
    # remove the toolbar
    del self.toolbar

def run(self):
    """Run method that performs all the real work"""
    # show the dialog
    self.dlg.show()
    # Run the dialog event loop
    result = self.dlg.exec_()
    # See if OK was pressed
    if result:
        # Do something useful here - delete the line containing pass and
        # substitute with your code.
        pass
    

tks!

-- coding: utf-8 --

""" /*************************************************************************** TheWorkflow A QGIS plugin This plugin has the function of generating the network flows between objects ------------------- begin : 2016-10-18 git sha : $Format:%H$ copyright : (C) 2016 by Robson Brandão email : [email protected] ***************************************************************************/

/***************************************************************************

•                                                                     *
  

• This program is free software; you can redistribute it and/or modify *
• it under the terms of the GNU General Public License as published by *
• the Free Software Foundation; either version 2 of the License, or *
• (at your option) any later version. *

•                                                                     *
  

***************************************************************************/ """ from PyQt4.QtCore import QSettings, QTranslator, qVersion, QCoreApplication from PyQt4.QtGui import QAction, QIcon

Initialize Qt resources from file resources.py

import resources

Import the code for the dialog

from the_workflow_dialog import TheWorkflowDialog import os.path

class TheWorkflow: """QGIS Plugin Implementation."""

def __init__(self, iface):
    """Constructor.

    :param iface: An interface instance that will be passed to this class
        which provides the hook by which you can manipulate the QGIS
        application at run time.
    :type iface: QgsInterface
    """
    # Save reference to the QGIS interface
    self.iface = iface
    # initialize plugin directory
    self.plugin_dir = os.path.dirname(__file__)
    # initialize locale
    locale = QSettings().value('locale/userLocale')[0:2]
    locale_path = os.path.join(
        self.plugin_dir,
        'i18n',
        'TheWorkflow_{}.qm'.format(locale))

    if os.path.exists(locale_path):
        self.translator = QTranslator()
        self.translator.load(locale_path)

        if qVersion() > '4.3.3':
            QCoreApplication.installTranslator(self.translator)


    # Declare instance attributes
    self.actions = []
    self.menu = self.tr(u'&The Workflow')
    # TODO: We are going to let the user set this up in a future iteration
    self.toolbar = self.iface.addToolBar(u'TheWorkflow')
    self.toolbar.setObjectName(u'TheWorkflow')

# noinspection PyMethodMayBeStatic
def tr(self, message):
    """Get the translation for a string using Qt translation API.

    We implement this ourselves since we do not inherit QObject.

    :param message: String for translation.
    :type message: str, QString

    :returns: Translated version of message.
    :rtype: QString
    """
    # noinspection PyTypeChecker,PyArgumentList,PyCallByClass
    return QCoreApplication.translate('TheWorkflow', message)


def add_action(
    self,
    icon_path,
    text,
    callback,
    enabled_flag=True,
    add_to_menu=True,
    add_to_toolbar=True,
    status_tip=None,
    whats_this=None,
    parent=None):
    """Add a toolbar icon to the toolbar.

    :param icon_path: Path to the icon for this action. Can be a resource
        path (e.g. ':/plugins/foo/bar.png') or a normal file system path.
    :type icon_path: str

    :param text: Text that should be shown in menu items for this action.
    :type text: str

    :param callback: Function to be called when the action is triggered.
    :type callback: function

    :param enabled_flag: A flag indicating if the action should be enabled
        by default. Defaults to True.
    :type enabled_flag: bool

    :param add_to_menu: Flag indicating whether the action should also
        be added to the menu. Defaults to True.
    :type add_to_menu: bool

    :param add_to_toolbar: Flag indicating whether the action should also
        be added to the toolbar. Defaults to True.
    :type add_to_toolbar: bool

    :param status_tip: Optional text to show in a popup when mouse pointer
        hovers over the action.
    :type status_tip: str

    :param parent: Parent widget for the new action. Defaults None.
    :type parent: QWidget

    :param whats_this: Optional text to show in the status bar when the
        mouse pointer hovers over the action.

    :returns: The action that was created. Note that the action is also
        added to self.actions list.
    :rtype: QAction
    """

    # Create the dialog (after translation) and keep reference
    self.dlg = TheWorkflowDialog()

    icon = QIcon(icon_path)
    action = QAction(icon, text, parent)
    action.triggered.connect(callback)
    action.setEnabled(enabled_flag)

    if status_tip is not None:
        action.setStatusTip(status_tip)

    if whats_this is not None:
        action.setWhatsThis(whats_this)

    if add_to_toolbar:
        self.toolbar.addAction(action)

    if add_to_menu:
        self.iface.addPluginToVectorMenu(
            self.menu,
            action)

    self.actions.append(action)

    return action

def initGui(self):
    """Create the menu entries and toolbar icons inside the QGIS GUI."""

    icon_path = ':/plugins/TheWorkflow/icon.png'
    self.add_action(
        icon_path,
        text=self.tr(u'The Workflow'),
        callback=self.run,
        parent=self.iface.mainWindow())


def unload(self):
    """Removes the plugin menu item and icon from QGIS GUI."""
    for action in self.actions:
        self.iface.removePluginVectorMenu(
            self.tr(u'&The Workflow'),
            action)
        self.iface.removeToolBarIcon(action)
    # remove the toolbar
    del self.toolbar


def run(self):
    """Run method that performs all the real work"""
    # show the dialog
    self.dlg.show()
    # Run the dialog event loop
    result = self.dlg.exec_()
    # See if OK was pressed
    if result:
        # Do something useful here - delete the line containing pass and
        # substitute with your code.
        pass