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thrase.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
ThRasE
A powerful and fast thematic raster editor Qgis plugin
-------------------
copyright : (C) 2019-2024 by Xavier Corredor Llano, SMByC
email : xavier.corredor.llano@gmail.com
***************************************************************************/
/***************************************************************************
* *
* 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. *
* *
***************************************************************************/
"""
import os.path
import shutil
from pathlib import Path
from qgis.PyQt.QtCore import QSettings, QTranslator, qVersion, QCoreApplication, Qt
from qgis.PyQt.QtGui import QIcon
from qgis.PyQt.QtWidgets import QAction
from qgis.utils import iface
# Initialize Qt resources from file resources.py
from .resources import *
from ThRasE.gui.main_dialog import ThRasEDialog
from ThRasE.gui.about_dialog import AboutDialog
from ThRasE.utils.qgis_utils import unload_layer
class ThRasE:
"""QGIS Plugin Implementation."""
dialog = None
# tmp dir for all process and intermediate files, only on demand
tmp_dir = None
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', 'ThRasE_{}.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)
self.menu_name_plugin = self.tr("ThRasE - Thematic Raster Editor")
self.pluginIsActive = False
ThRasE.dialog = None
self.about_dialog = AboutDialog()
# 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('ThRasE', message)
def initGui(self):
### Main dialog menu
# Create action that will start plugin configuration
icon_path = ':/plugins/thrase/icons/thrase.svg'
self.dockable_action = QAction(QIcon(icon_path), "ThRasE", self.iface.mainWindow())
# connect the action to the run method
self.dockable_action.triggered.connect(self.run)
# Add toolbar button and menu item
self.iface.addToolBarIcon(self.dockable_action)
self.iface.addPluginToMenu(self.menu_name_plugin, self.dockable_action)
# Plugin info
# Create action that will start plugin configuration
icon_path = ':/plugins/thrase/icons/about.svg'
self.about_action = QAction(QIcon(icon_path), self.tr('About'), self.iface.mainWindow())
# connect the action to the run method
self.about_action.triggered.connect(self.about)
# Add toolbar button and menu item
self.iface.addPluginToMenu(self.menu_name_plugin, self.about_action)
def about(self):
self.about_dialog.show()
#--------------------------------------------------------------------------
def run(self):
"""Run method that loads and starts the plugin"""
if not self.pluginIsActive:
self.pluginIsActive = True
# dialog may not exist if:
# first run of plugin
# removed on close (see self.onClosePlugin method)
if ThRasE.dialog is None:
ThRasE.dialog = ThRasEDialog()
# connect to provide cleanup on closing of dialog
ThRasE.dialog.closingPlugin.connect(self.onClosePlugin)
# setup and show the dialog
if not ThRasE.dialog.setup_gui():
return
ThRasE.dialog.show()
# Run the dialog event loop
result = ThRasE.dialog.exec_()
# See if OK was pressed
if result:
# Do something useful here - delete the line containing pass and
# substitute with your code.
pass
else:
# an instance of ThRasE is already created
# brings that instance to front even if it is minimized
ThRasE.dialog.setWindowState(ThRasE.dialog.windowState() & ~Qt.WindowMinimized | Qt.WindowActive)
ThRasE.dialog.raise_()
ThRasE.dialog.activateWindow()
#--------------------------------------------------------------------------
def onClosePlugin(self):
"""Cleanup necessary items here when plugin is closed"""
from ThRasE.core.edition import LayerToEdit
# restore the recode pixel table to original (if was changed) of the thematic raster to edit
if LayerToEdit.current:
ThRasE.dialog.restore_recode_table()
# restore the opacity of all active layers to 100%
[al.update_layer_opacity(100) for als in [view_widget.active_layers for view_widget in ThRasEDialog.view_widgets]
for al in als if al.opacity < 100]
# close the navigation dialog if is open
if LayerToEdit.current and LayerToEdit.current.navigation_dialog and LayerToEdit.current.navigation_dialog.isVisible():
LayerToEdit.current.navigation_dialog.close()
LayerToEdit.current.navigation_dialog = None
# close the autofill dialog if is open
if hasattr(ThRasE.dialog, "autofill_dialog") and ThRasE.dialog.autofill_dialog and ThRasE.dialog.autofill_dialog.isVisible():
ThRasE.dialog.autofill_dialog.close()
ThRasE.dialog.autofill_dialog = None
self.removes_temporary_files()
# remove this statement if dialog is to remain
# for reuse if plugin is reopened
# Commented next statement since it causes QGIS crashe
# when closing the docked window:
ThRasE.dialog.close()
ThRasE.dialog = None
# reset some variables
self.pluginIsActive = False
ThRasEDialog.view_widgets = []
LayerToEdit.instances = {}
LayerToEdit.current = None
from qgis.utils import reloadPlugin
reloadPlugin("ThRasE - Thematic Raster Editor")
def unload(self):
"""Removes the plugin menu item and icon from QGIS GUI."""
self.removes_temporary_files()
# Remove the plugin menu item and icon
self.iface.removePluginMenu(self.menu_name_plugin, self.dockable_action)
self.iface.removePluginMenu(self.menu_name_plugin, self.about_action)
self.iface.removeToolBarIcon(self.dockable_action)
if ThRasE.dialog:
ThRasE.dialog.close()
@staticmethod
def removes_temporary_files():
if not ThRasE.dialog:
return
# unload all layers instances from Qgis saved in tmp dir
try:
d = ThRasE.tmp_dir
files_in_tmp_dir = [Path(d, f) for f in os.listdir(d)
if Path(d, f).is_file()]
except: files_in_tmp_dir = []
for file_tmp in files_in_tmp_dir:
unload_layer(str(file_tmp))
# clear ThRasE.tmp_dir
if ThRasE.tmp_dir and os.path.isdir(ThRasE.tmp_dir):
shutil.rmtree(ThRasE.tmp_dir, ignore_errors=True)
ThRasE.tmp_dir = None
# clear qgis main canvas
iface.mapCanvas().refreshAllLayers()