"""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',

'ReanalysisVisualization_{}.qm'.format(locale))

if os.path.exists(locale_path):

self.translator = QTranslator()

self.translator.load(locale_path)

QCoreApplication.installTranslator(self.translator)

# Declare instance attributes

self.actions = []

self.menu = self.tr(u'&ReanalysisVisualization')

# Check if plugin was started the first time in current QGIS session

# Must be set in initGui() to survive plugin reloads

self.first_start = 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('ReanalysisVisualization', 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:

# Adds plugin icon to Plugins toolbar

self.iface.addToolBarIcon(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/reanalysis_visualization/icon.png'

self.add_action(

icon_path,

text=self.tr(u'Reanalysis visualization'),

callback=self.run,

parent=self.iface.mainWindow())

# will be set False in run()

self.first_start = True

def unload(self):

"""Removes the plugin menu item and icon from QGIS GUI."""

for action in self.actions:

self.iface.removePluginMenu(

self.tr(u'&ReanalysisVisualization'),

action)

self.iface.removeToolBarIcon(action)

def __change_active_layer(self, group):

for i in range(len(group.findLayerIds())):

msg = QMessageBox()

msg.setText(str(i)+' / ' + str(len(group.findLayerIds())))

msg.show()

group.setIsMutuallyExclusive(True, i)

time.sleep(5)

def run(self):

"""Run method that performs all the real work"""

# Create the dialog with elements (after translation) and keep reference

# Only create GUI ONCE in callback, so that it will only load when the plugin is started

if self.first_start == True:

self.first_start = False

self.dlg = ReanalysisVisualizationDialog()

project = QgsProject.instance()

if not project.mapLayersByName('back'):

layer = QgsVectorLayer(

'./background/ne_110m_admin_0_countries.shp', "back", "ogr")

project.addMapLayer(layer)

# show the dialog

self.dlg.show()

# Run the dialog event loop

result = self.dlg.exec_()

# See if OK was pressed

if result:

params, variables, drawStyle, need_slideshow = self.dlg.prepare_form_data()

try:

root = QgsProject.instance().layerTreeRoot()

group = root.findGroup('contours')

if group:

group.removeAllChildren()

else:

group = root.addGroup("contours")

root.insertChildNode(-1,

QgsLayerTreeLayer(project.mapLayersByName('back')[0]))

root.removeLayer(project.mapLayersByName('back')[0])

data_grid = DataGrid(params, variables)

geojsons = Isolines(data_grid, drawStyle).get_geojsons()

for geojson in geojsons:

layer = QgsVectorLayer(

geojson['geojson'], "leadTime = " + str(geojson['leadTime']), "ogr")

layer.setOpacity(0.87)

# apply contour style properties

symbol_layer = layer.renderer().symbol().symbolLayers()[0]

symbol_layer.setDataDefinedProperty(

QgsSymbolLayer.PropertyStrokeColor, QgsProperty.fromField("stroke"))

symbol_layer.setDataDefinedProperty(

QgsSymbolLayer.PropertyFillColor, QgsProperty.fromField("fill"))

symbol_layer.setDataDefinedProperty(

QgsSymbolLayer.PropertyStrokeWidth, QgsProperty.fromField("stroke-width"))

# add labels

pal_layer = QgsPalLayerSettings()

pal_layer.fieldName = 'title'

pal_layer.enabled = True

pal_layer.placement = QgsPalLayerSettings.PerimeterCurved

pal_layer.placementFlags = QgsPalLayerSettings.OnLine

labeler = QgsVectorLayerSimpleLabeling(pal_layer)

layer.setLabeling(labeler)

layer.setLabelsEnabled(True)

# add vector layer with isolines

QgsProject.instance().addMapLayer(layer, False)

group.insertChildNode(-1, QgsLayerTreeLayer(layer))

group.setIsMutuallyExclusive(True, 0)

if need_slideshow:

slideshow = threading.Thread(

target=self.__change_active_layer, args=(group,))

slideshow.start()

except Exception as e:

error_text = ''

if (params['east'] > 180 or params['east'] < -180 or params['west'] > 180 or params['west'] < -180 or params['south'] > 90 or params['south'] < -90 or params['north'] > 90 or params['north'] < -90):

error_text += "Ошибка: Некорректно заданы координаты области"

else:

error_text += "Ошибка: \n" + str(e)

error_dialog = QErrorMessage()

error_dialog.showMessage(error_text)