Buon pomeriggio a tutti. Mi sto cimentando per la prima volta con la
creazione di plugin e finora sono riuscito sempre a risolvere i problemi
"grazie" agli errori segnalati da QGIS al momento dell'avvio o quando vado a
far girare il plugin. Ora invece non mi da nessun errore, ma non il plugin
non elabora. Se vi incollo il codice, potreste aiutarmi e capire dove è il
problema? Fino alla "def search()" sembrava andare tutto come doveva. P.S.:
c'è un modo per fare il debug del codice fino ad un certo punto, oppure
eseguire il codice passo passo (come in VBA)? Grazie in anticipo!
from PyQt4 import QtCore, QtGui
from qgis.core import *
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from qgis.core import *
from qgis.gui import *
from ui_searchparcels2 import Ui_SearchParcels2
# create the dialog for zoom to point
class SearchParcels2Dialog(QtGui.QDialog, Ui_SearchParcels2):
def __init__(self):
QtGui.QDialog.__init__(self)
self.setupUi(self)
QObject.connect(self.uptadeButton, SIGNAL("clicked()"),
self.chooseLayer)
QObject.connect(self.comboBox,
SIGNAL("currentIndexChanged(QString)"), self.chooseField)
QObject.connect(self.comboBox,
SIGNAL("currentIndexChanged(QString)"), self.chooseField2)
QObject.connect(self.selectBox, SIGNAL("stateChanged(int)"),
self.OnSelectBoxClicked)
QObject.connect(self.cancelButton, SIGNAL("clicked()"),
self.cancelSearch)
QObject.connect(self.goButton, SIGNAL("clicked()"), self.search)
self.chooseLayer()
# in first comboBox show the list of layers (list of names)
def chooseLayer(self):
layerList = # crea una lista vuota
self.comboBox.clear() # svuota la lista del combo box
layerList = self.getLayerNames() # a layerList assegna il
risultato della procedura getLayerNames()
self.comboBox.addItems(layerList)
self.FoglioLine.clear()
self.ParticelLine.clear()
self.OnSelectBoxClicked()
return
# Get the list of layers (list of names) in QgsMapLayerRegistry
def getLayerNames(self):
layermap = QgsMapLayerRegistry.instance().mapLayers() # assegna a
layermap l'insieme dei layers caricati
layerLst =
for i, layer in layermap.iteritems():
if layer.type() == QgsMapLayer.VectorLayer: # considera solo
i layers vettoriali
layerLst.append( unicode( layer.name() ) ) # prende il
nome di ogni layer a lo aggiunge alla lista layerLst
return layerLst
# in second comboBox show the list fields (list of names)
def chooseField(self):
fieldList =
self.campo1.clear()
fieldList = self.getFieldNames()
self.campo1.addItems( fieldList )
return
# Get the list fields (list of names) for the selected layer
def getFieldNames(self):
layermap = QgsMapLayerRegistry.instance().mapLayers()
fieldLst =
for i, layer in layermap.iteritems():
if layer.type() == QgsMapLayer.VectorLayer and layer.name() ==
self.comboBox.currentText():
if layer.isValid():
fields = layer.dataProvider().fields()
for i in range(fields.count()):
field = fields[i]
fieldLst.append(field.name())
return fieldLst
# in third comboBox show the list fields (list of names)
def chooseField2(self):
fieldList =
self.campo2.clear()
fieldList = self.getFieldNames()
self.campo2.addItems( fieldList )
return
def OnSelectBoxClicked(self):
layermap = QgsMapLayerRegistry.instance().mapLayers()
for i, layer in layermap.iteritems():
if layer.type() == QgsMapLayer.VectorLayer and layer.name() ==
self.comboBox.currentText():
if layer.isValid():
if not self.selectBox.isChecked():
self.panBox.setEnabled(False)
self.scaleBox.setEnabled(False)
else:
self.panBox.setEnabled(layer.hasGeometryType())
self.scaleBox.setEnabled(layer.hasGeometryType())
return
def cancelSearch(self):
self.continueSearch = False
return
def search(self):
i = self.comboBox.currentIndex()
if i < 0:
return None
layerId = self.comboBox.itemData(i)
layer = QgsMapLayerRegistry.instance().mapLayer(layerId)
if layer is None:
return
toFind = self.FoglioLine.text()
toFind2 = self.ParticelLine.text()
f = QgsFeature()
results =
fieldIndex = self.campo1.currentIndex()
fieldName = self.campo1.itemData(fieldIndex)
fieldIndex2 = self.campo2.currentIndex()
fieldName2 = self.campo2.itemData(fieldIndex2)
if fieldName == "" or fieldName2 == "":
QMessageBox
msgBox.setText("Search Parcels 2: Seleziona un campo.")
msgBox.exec_()
return
try:
float(toFind)
except ValueError:
QMessageBox
msgBox.setText("Search Parcels 2: Inserisci un valore
numerico.")
msgBox.exec_()
return
try:
float(toFind2)
except ValueError:
QMessageBox
msgBox.setText("Search Parcels 2: Inserisci un valore
numerico.")
msgBox.exec_()
return
show progress bar
self.progressBar.setMinimum(0)
self.progressBar.setMaximum(layer.featureCount())
self.progressBar.setValue(0)
self.widget_2.show()
# disable rest of UI
self.layerWidgetGroup.setEnabled(False)
self.SearchWidgetGroup.setEnabled(False)
self.CheckWidgetGroup.setEnabled(False)
# create feature request
featReq = QgsFeatureRequest()
featReq.setFlags(QgsFeatureRequest.NoGeometry)
Req = featReq.setSubsetOfAttributes([fieldIndex])
Re2 = featReq.setSubsetOfAttributes([fieldIndex2])
iter = layer.getFeatures(featReq)
# process
k = 0
n = 0
self.continueSearch = True
while iter.nextFeature(f) and self.continueSearch:
k += 1
if self.evaluate(f[fieldName], toFind):
results.append(f.id())
f2 = QgisFeature(f.id())
while iter.nextFeature(f2) and self.continueSearh:
n += 1
if self.evaluate(f[fieldName2], toFind2):
results2.append(f2.id())
self.progressBar.setValue(n)
QCoreApplication.processEvents()
# reset UI
self.widget_2.hide()
self.layerWidgetGroup.setEnabled(True)
self.SearchWidgetGroup.setEnabled(True)
self.CheckWidgetGroup.setEnabled(True)
# process results
if self.continueSearch:
QMessageBox
msgBox.setText("Search Parcels 2: %u particelle trovate.")
msgBox.exec_()
self.processResults(results2)
return
def evaluate(self, v1, v2):
return float(v1) == float(v2)
def processResults(self, results2):
if layer is None:
return
if self.selectBox.isChecked():
layer.setSelectedFeatures(results2)
if len(results2) == 0:
return
if self.panBox.isEnabled() and self.panBox.isChecked():
canvas = self.iface.mapCanvas()
rect = canvas.mapRenderer().layerExtentToOutputExtent(layer,
layer.boundingBoxOfSelected())
if rect is not None:
if self.scaleBox.isEnabled() and
self.scaleBox.isChecked():
rect.scale(1.5)
canvas.setExtent(rect)
else:
canvas.setExtent(QgsRectangle(rect.center(),
rect.center()))
canvas.refresh()
if self.formBox.isChecked():
f = QgsFeature()
for id in results2:
if
layer.getFeatures(QgsFeatureRequest().setFilterFid(id)).nextFeature(f):
self.IdentifyResult(layer, f)
return
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