def __init__(self, iface): GenericTool.__init__(self, iface) self.labelName = "Calculate Area in Region" self.dlg = CalculateRegionDialog() self.dlg.lineEditShapeClip.clear() self.dlg.lineEditFolder.clear() self.dlg.lineEditShapeOut.clear() self.dlg.lineEditCoordRef.clear() self.dlg.pushButtonShape.clicked.connect(self.InputShape) self.dlg.pushButtonFolder.clicked.connect(self.InputFolder) self.dlg.pushButtonShapeOut.clicked.connect(self.OutputShape) self.dlg.pushButtonCoordRef.clicked.connect(self.SelectCoordSystem) self.ListUnits = ['Square meters','Square kilometers','Hectares'] self.dlg.Units.addItems(self.ListUnits)
class CalculateRegion(GenericTool):
"""QGIS Plugin Implementation."""
def __init__(self, iface):
GenericTool.__init__(self, iface)
self.labelName = "Calculate Area in Region"
self.dlg = CalculateRegionDialog()
self.dlg.lineEditShapeClip.clear()
self.dlg.lineEditFolder.clear()
self.dlg.lineEditShapeOut.clear()
self.dlg.lineEditCoordRef.clear()
self.dlg.pushButtonShape.clicked.connect(self.InputShape)
self.dlg.pushButtonFolder.clicked.connect(self.InputFolder)
self.dlg.pushButtonShapeOut.clicked.connect(self.OutputShape)
self.dlg.pushButtonCoordRef.clicked.connect(self.SelectCoordSystem)
self.ListUnits = ['Square meters','Square kilometers','Hectares']
self.dlg.Units.addItems(self.ListUnits)
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
Lista = ['Square meters','Square kilometers','Hectares']
TypeUnits = Lista[self.dlg.Units.currentIndex()]
if result:
ExtrairShape = self.dlg.lineEditFolder.text()
CalcShape = self.dlg.lineEditShapeClip.text()
OutShape = self.dlg.lineEditShapeOut.text()
Ref = self.dlg.lineEditCoordRef.text()
self.startWorker(ExtrairShape, CalcShape, OutShape, Ref, TypeUnits)
#Function input clip shape file
def InputShape(self):
filters = "ShapeFiles (*.shp)"
iShape = QFileDialog.getOpenFileName(self.dlg,'Insert Shapefile','',filters)
self.dlg.lineEditShapeClip.setText(iShape)
#Function input folder shapes
def InputFolder(self):
iFolder = QFileDialog.getExistingDirectory(self.dlg,'Insert Folder','',QFileDialog.ShowDirsOnly)
self.dlg.lineEditFolder.setText(iFolder)
#Function output shape file
def OutputShape(self):
filters = "ShapeFiles (*.shp)"
oShape = QFileDialog.getSaveFileName(self.dlg,'Output Shapefile','',filters)
self.dlg.lineEditShapeOut.setText(oShape)
def SelectCoordSystem(self):
projection = None
projection = qgis.gui.QgsGenericProjectionSelector()
teste = projection.exec_()
EPSG = projection.selectedAuthId()
self.dlg.lineEditCoordRef.setText(EPSG)
#Function Start thread processing
def startWorker(self, ExtrairShape, CalcShape, OutShape, Ref, TypeUnits):
# create a new worker instance
worker = Worker(ExtrairShape, CalcShape, OutShape, Ref, TypeUnits)
# configure the QgsMessageBar
qgis.utils.iface.messageBar().clearWidgets()
progressMessageBar = qgis.utils.iface.messageBar().createMessage('Calculating area...')
progressBar = QProgressBar()
progressBar.setMaximum(100)
progressMessageBar.layout().addWidget(progressBar)
qgis.utils.iface.messageBar().pushWidget(progressMessageBar)
self.progressMessageBar = progressMessageBar
# start the worker in a new thread
thread = QThread()
worker.moveToThread(thread)
worker.finished.connect(self.workerFinished)
worker.error.connect(self.workerError)
worker.progress.connect(progressBar.setValue)
thread.started.connect(worker.runCalc)
thread.start()
self.thread = thread
self.worker = worker
self.output = OutShape
#Function to finished thread processing
def workerFinished(self,value):
# clean up the worker and thread
self.worker.deleteLater()
self.thread.quit()
self.thread.wait()
self.thread.deleteLater()
LayerName = os.path.basename(self.output)[0:len(os.path.basename(self.output))-4]
qgis.utils.iface.addVectorLayer(self.output,LayerName,"ogr")
qgis.utils.iface.messageBar().clearWidgets()
if value > 0:
QMessageBox.warning(qgis.utils.iface.mainWindow(),"Calculate Area in Region",'There '+str(value)+
' geometries not valid. For more information see the log file at:'+os.path.join(os.path.dirname(self.output),"LogErros.txt"))
else:
QMessageBox.information(qgis.utils.iface.mainWindow(),"Calculate Area in Region","Process finished with successfully"+
'\n'+'Layer:'+str(os.path.basename(self.output)[0:len(os.path.basename(self.output))-4])+" map added")
#Function report error in work
def workerError(self, e, exception_string):
QgsMessageLog.logMessage('Worker thread raised an exception:\n'.format(exception_string), level=QgsMessageLog.CRITICAL)