class FlaechensummeDialogTest(unittest.TestCase):
"""Test dialog works."""
def setUp(self):
"""Runs before each test."""
self.dialog = FlaechensummeDialog(None)
def tearDown(self):
"""Runs after each test."""
self.dialog = None
def test_dialog_ok(self):
"""Test we can click OK."""
button = self.dialog.button_box.button(QDialogButtonBox.Ok)
button.click()
result = self.dialog.result()
self.assertEqual(result, QDialog.Accepted)
def test_dialog_cancel(self):
"""Test we can click cancel."""
button = self.dialog.button_box.button(QDialogButtonBox.Cancel)
button.click()
result = self.dialog.result()
self.assertEqual(result, QDialog.Rejected)
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',
'Flaechensumme_{}.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)
# Create the dialog (after translation) and keep reference
self.dlg = FlaechensummeDialog()
# Declare instance attributes
self.actions = []
self.menu = self.tr(u'&Flaechensumme')
# TODO: We are going to let the user set this up in a future iteration
self.toolbar = self.iface.addToolBar(u'Flaechensumme')
self.toolbar.setObjectName(u'Flaechensumme')
self.layers = self.iface.legendInterface().layers()
self.vLayers = self.initVectorLayers()
def setUp(self):
"""Runs before each test."""
self.dialog = FlaechensummeDialog(None)
class Flaechensumme:
"""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',
'Flaechensumme_{}.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)
# Create the dialog (after translation) and keep reference
self.dlg = FlaechensummeDialog()
# Declare instance attributes
self.actions = []
self.menu = self.tr(u'&Flaechensumme')
# TODO: We are going to let the user set this up in a future iteration
self.toolbar = self.iface.addToolBar(u'Flaechensumme')
self.toolbar.setObjectName(u'Flaechensumme')
self.layers = self.iface.legendInterface().layers()
self.vLayers = self.initVectorLayers()
# 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('Flaechensumme', 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)
icon = QIcon(':/plugins/Flaechensumme/icon.png')
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/Flaechensumme/icon.png'
self.add_action(
icon_path,
text=self.tr(u'Flaechensummen...'),
callback=self.run,
parent=self.iface.mainWindow())
self.initComboBox()
self.initAttributeSelect()
self.initTable()
self.dlg.comboBox.currentIndexChanged.connect(self.currentLayerChanged)
self.dlg.attributeSelect.currentIndexChanged.connect(self.currentClassificationChanged)
self.dlg.button_copyToClip.clicked.connect(self.copyToClipboard)
def unload(self):
"""Removes the plugin menu item and icon from QGIS GUI."""
for action in self.actions:
self.iface.removePluginMenu(
self.tr(u'&Flaechensumme'),
action)
self.iface.removeToolBarIcon(action)
# remove the toolbar
del self.toolbar
def run(self):
"""Run method that performs all the real work"""
self.layers = self.iface.legendInterface().layers()
self.vLayers = self.initVectorLayers()
self.initComboBox()
self.initAttributeSelect()
self.initTable()
# 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
def initTable(self):
"""Initializes a tablewidget-item in order to display the results"""
self.dlg.tableWidget.clear()
self.dlg.tableWidget.setRowCount(6)
self.dlg.tableWidget.setColumnCount(6)
self.dlg.tableWidget.setHorizontalHeaderItem(0, QTableWidgetItem("Jahr"))
self.dlg.tableWidget.setHorizontalHeaderItem(1, QTableWidgetItem("Flaeche [ha]".decode('utf8')))
self.dlg.tableWidget.setHorizontalHeaderItem(2, QTableWidgetItem("kleinste Flaeche [ha]".decode('utf8')))
self.dlg.tableWidget.setHorizontalHeaderItem(3, QTableWidgetItem("größte Flaeche [ha]".decode('utf8')))
self.dlg.tableWidget.setHorizontalHeaderItem(4, QTableWidgetItem("durchschnittl. Flaeche [ha]".decode('utf8')))
self.dlg.tableWidget.setHorizontalHeaderItem(5, QTableWidgetItem("Anzahl bearbeiteter Flaechen".decode('utf8')))
def initComboBox(self):
"""Inserts all available vectorlayers in the comboBox"""
# Test, if there are any vector layers available
self.dlg.comboBox.clear()
if len(self.vLayers) > 0:
self.dlg.comboBox.setEnabled(True)
self.dlg.attributeSelect.setEnabled(True)
layer_names = []
for layer in self.vLayers:
layer_names.append(layer.name())
self.dlg.comboBox.addItems(layer_names) # vectorlayers available, set combobox content
else:
self.dlg.comboBox.addItem("keine geeigneten Layer vorhanden!") # no vectorlayer, set user-warning
self.dlg.comboBox.setEnabled(False) # disable combobox
self.dlg.attributeSelect.setEnabled(False) # disable classification selector
def initAttributeSelect(self):
"""Inserts all attributes of the selected Layer into the combobox"""
self.dlg.attributeSelect.clear()
if len(self.vLayers) > 0:
currentLayer = self.vLayers[self.dlg.comboBox.currentIndex()]
currentLayerFieldNames = []
for field in currentLayer.pendingFields():
currentLayerFieldNames.append(field.name())
self.dlg.attributeSelect.addItems(currentLayerFieldNames)
def initVectorLayers(self):
"""Returns all vectorlayers"""
try:
layer_list = []
for layer in self.layers:
if layer.type() == 0: # check if current Layer is a vectorlayer
layer_list.append(layer) # if so, add it to the array
return layer_list
except:
print 'initVectorLayers'
def currentLayerChanged(self):
"""Triggered by the "currentIndexChanged"-event of the layer combobox"""
self.dlg.attributeSelect.clear()
self.initAttributeSelect()
def calculateArea(self):
currentLayer = self.vLayers[self.dlg.comboBox.currentIndex()]
area = 0
for f in currentLayer.getFeatures():
area += f.geometry().area()
return area /100 /100 #in ha
def currentClassificationChanged(self):
"""Handler for changing the classification. Includes calculation of the desired results."""
try:
# Reading current layer and classification out of the comboboxes
currentLayer = self.vLayers[self.dlg.comboBox.currentIndex()]
currentClassification = self.dlg.attributeSelect.currentText()
# clear table widet and initializing it again
self.dlg.tableWidget.clear()
self.initTable()
# saving possible classifications in a set -> Set contains only unique classifications
allClassifications = set()
for feature in currentLayer.getFeatures():
allClassifications.add(feature[currentClassification])
# setting row count
self.dlg.tableWidget.setRowCount(len(allClassifications))
# iterator for rows
rowCount = 0
# initialising filter expression
for classification in allClassifications:
request = QgsFeatureRequest()
request.setFilterExpression(str(currentClassification) + ' = ' + str(classification))
# helper values for storing results
area_total = 0
area_collection = []
for feature in currentLayer.getFeatures(request):
print str(currentClassification) + ' = ' + str(classification) + " --- " + str(feature.geometry().area())
area_total += feature.geometry().area()
area_collection.append(feature.geometry().area())
# write out the results
self.dlg.tableWidget.setItem(rowCount, 0, QTableWidgetItem(str(classification)))
self.dlg.tableWidget.setItem(rowCount, 1, QTableWidgetItem(str(round(area_total / 10000, 3))))
self.dlg.tableWidget.setItem(rowCount, 2, QTableWidgetItem(str(round(min(area_collection) / 10000, 3))))
self.dlg.tableWidget.setItem(rowCount, 3, QTableWidgetItem(str(round(max(area_collection) / 10000, 3))))
self.dlg.tableWidget.setItem(rowCount, 4, QTableWidgetItem(str(round(sum(area_collection) / len(area_collection) / 10000,3))))
self.dlg.tableWidget.setItem(rowCount, 5, QTableWidgetItem(str(len(area_collection))))
rowCount += 1
except:
print 'currentClassificationChanged'
def copyToClipboard(self):
# check if there is anything selected
if len(self.dlg.tableWidget.selectedItems()) == 0:
return
clipboard = QApplication.clipboard()
text = ''
columns = self.dlg.tableWidget.columnCount()
selectionTopEnd = self.dlg.tableWidget.selectedRanges()[0].topRow()
selectionBottomEnd = self.dlg.tableWidget.selectedRanges()[0].bottomRow()
# reading headers
for i in range(columns):
text += self.dlg.tableWidget.horizontalHeaderItem(i).text()
if i != (columns - 1):
text += chr(9)
text += chr(13)
# reading contents
for i in range(selectionTopEnd, selectionBottomEnd + 1):
for j in range(columns):
text += self.dlg.tableWidget.item(i,j).text()
if j != (columns - 1):
text += chr(9)
if i != selectionBottomEnd:
text += chr(13)
# set text
clipboard.setText(text)
