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layer_style_loader.py
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layer_style_loader.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
LayerStyleLoader
A QGIS plugin
Load multiple layer styles based on layer names
-------------------
begin : 2016-09-16
git sha : $Format:%H$
copyright : (C) 2016 by Bernd Loigge
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 __future__ import absolute_import
from builtins import str
from builtins import object
from qgis.core import QgsProject
from qgis.PyQt.QtCore import QSettings, QTranslator, qVersion, QCoreApplication, Qt
from qgis.PyQt.QtWidgets import QAction, QFileDialog
from qgis.PyQt.QtGui import QIcon
# Initialize Qt resources from file resources.py
from . import resources
# Import the code for the DockWidget
from .layer_style_loader_dockwidget import LayerStyleLoaderDockWidget
import os.path
project = QgsProject.instance()
class LayerStyleLoader(object):
"""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',
'LayerStyleLoader_{}.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'&Layer Style Loader')
# TODO: We are going to let the user set this up in a future iteration
self.toolbar = self.iface.addToolBar(u'LayerStyleLoader')
self.toolbar.setObjectName(u'LayerStyleLoader')
#print "** INITIALIZING LayerStyleLoader"
self.pluginIsActive = False
self.dockwidget = None
# 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('LayerStyleLoader', 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
"""
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.addPluginToMenu(
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/LayerStyleLoader/icon.png'
self.add_action(
icon_path,
text=self.tr(u'Load Layer Styles'),
callback=self.run,
parent=self.iface.mainWindow())
#--------------------------------------------------------------------------
def onClosePlugin(self):
"""Cleanup necessary items here when plugin dockwidget is closed"""
#print "** CLOSING LayerStyleLoader"
# disconnects
self.dockwidget.closingPlugin.disconnect(self.onClosePlugin)
self.iface.newProjectCreated.disconnect(self.loadFolderPathInProject)
self.iface.projectRead.disconnect(self.loadFolderPathInProject)
# remove this statement if dockwidget is to remain
# for reuse if plugin is reopened
# Commented next statement since it causes QGIS crashe
# when closing the docked window:
self.dockwidget = None
self.pluginIsActive = False
def unload(self):
"""Removes the plugin menu item and icon from QGIS GUI."""
#print "** UNLOAD LayerStyleLoader"
for action in self.actions:
self.iface.removePluginMenu(
self.tr(u'&Layer Style Loader'),
action)
self.iface.removeToolBarIcon(action)
# remove the toolbar
del self.toolbar
#--------------------------------------------------------------------------
def run(self):
"""Run method that loads and starts the plugin"""
if not self.pluginIsActive:
self.pluginIsActive = True
#print "** STARTING LayerStyleLoader"
# dockwidget may not exist if:
# first run of plugin
# removed on close (see self.onClosePlugin method)
if self.dockwidget == None:
# Create the dockwidget (after translation) and keep reference
self.dockwidget = LayerStyleLoaderDockWidget()
# connect to provide cleanup on closing of dockwidget
self.dockwidget.closingPlugin.connect(self.onClosePlugin)
# show the dockwidget
# TODO: fix to allow choice of dock location
self.iface.addDockWidget(Qt.LeftDockWidgetArea, self.dockwidget)
self.dockwidget.show()
# Check if new project gets opend or file loaded
self.iface.newProjectCreated.connect(self.loadFolderPathInProject)
self.iface.projectRead.connect(self.loadFolderPathInProject)
# Load Init Stuff
# Load Folder Path if exists
self.loadFolderPathInProject()
self.dockwidget.pushButton.clicked.connect(self.selectParentFolder)
self.dockwidget.pushButton_2.clicked.connect(self.loadLayerStyles)
#--------------------------------------------------------------------------
def selectParentFolder(self):
global project
cPath = project.readEntry("styles", "styleLayerPath", "nothing")[0]
naming = "Select Parent Style Folder"
if cPath != "nothing":
if cPath.startswith('.'):
cPath = project.homePath() + cPath[1:]
folderpath = QFileDialog.getExistingDirectory(self.dockwidget, naming, cPath)
else:
folderpath = QFileDialog.getExistingDirectory(self.dockwidget, naming, os.path.expanduser("~"))
if folderpath != "":
self.saveFolderPathInProject(folderpath)
self.loadFolderPathInProject()
self.updateStyleListComboBox()
def saveFolderPathInProject(self, folderpath):
global project
project.writeEntry("styles", "styleLayerPath", project.writePath(folderpath))
def loadFolderPathInProject(self):
global project
folderpath = project.readEntry("styles", "styleLayerPath", "nothing")[0]
if folderpath != "nothing":
self.dockwidget.lineEdit.setText(folderpath)
self.updateStyleListComboBox()
else:
self.dockwidget.lineEdit.setText("")
def updateStyleListComboBox(self):
global project
folderpath = project.readEntry("styles", "styleLayerPath", "nothing")[0]
if folderpath != "":
comboBox = self.dockwidget.comboBox
comboBox.clear()
if folderpath.startswith('.'):
folderpath = project.homePath() + folderpath[1:]
data = os.listdir(folderpath)
folder = []
for content in data:
if os.path.isdir(folderpath + os.path.normcase("/") + str(content)):
folder.append(content)
comboBox.addItems(folder)
def loadLayerStyles(self):
global project
folderpath = project.readEntry("styles", "styleLayerPath", "nothing")[0]
if folderpath.startswith('.'):
folderpath = project.homePath() + folderpath[1:]
styling = folderpath + os.path.normcase("/") + self.dockwidget.comboBox.currentText()
# Check if any QML File in Folder
for myFile in (os.listdir(styling)):
layer = self.getLayerByName(os.path.splitext(myFile)[0])
if layer != False:
layer.loadNamedStyle(styling + os.path.normcase("/") + myFile)
self.iface.mapCanvas().refresh()
self.iface.mapCanvas().refreshAllLayers()
def getLayerByName(self, name):
global project
myLegendLayers = layers = [tree_layer.layer() for tree_layer in QgsProject.instance().layerTreeRoot().findLayers()]
for myLayer in myLegendLayers:
if name == myLayer.name():
return myLayer
return False