I'm creating a plugin in which I use spinboxes. The value set by the user on the spinboxes is meant to define precision in which the result will be printed. Even though my spinbox has different values each time I'm debugging it with print(QSpinBox().value) it always returns 0. I suppose that 0 is a default value to be printed, but I can't get to find any solution to my problem.
I'm a beginner in Python.
This is my code:
class ALCalculatorDialog(QtWidgets.QDialog, FORM_CLASS):
def __init__(self, parent=None):
"""Constructor."""
super(ALCalculatorDialog, self).__init__(parent)
self.setupUi(self)
self.stackedWidget.setCurrentWidget(self.home)
self.pbAreaPage.clicked.connect(self.gotoArea)
self.pbLengthPage.clicked.connect(self.gotoLength)
self.pbJumpArea.clicked.connect(self.gotoArea)
self.pbJumpLength.clicked.connect(self.gotoLength)
self.cbLengthLayerList.setFilters(QgsMapLayerProxyModel.LineLayer)
self.cbAreaLayerList.setFilters(QgsMapLayerProxyModel.PolygonLayer)
self.pbLengthCalc.clicked.connect(self.onPbLengthCalcClicked)
self.pbAreaCalc.clicked.connect(self.onPbAreaCalcClicked)
def onPbLengthCalcClicked(self):
self.sb = QSpinBox()
precision_value = self.sb.value()
self.cb = QgsMapLayerComboBox(self)
layer = self.cb.currentLayer()
miles_conv = 0.621371192
yard_conv = 1093.6132983377
meters_conv = 1000
if self.rbLengthMeters.isChecked():
total_length = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_length += geometry.length()
total_length = total_length * meters_conv
self.lblLengthResult.setText('%.*f' % (precision_value, total_length))
elif self.rbLengthKilometers.isChecked():
total_length = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_length += geometry.length()
self.lblLengthResult.setText('%.*f' % (precision_value, total_length))
elif self.rbLengthMiles.isChecked():
total_length = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_length += geometry.length()
total_length = total_length * miles_conv
self.lblLengthResult.setText('%.*f' % (precision_value, total_length))
elif self.rbLengthYards.isChecked():
total_length = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_length += geometry.length()
total_length = total_length * yard_conv
self.lblLengthResult.setText('%.*f' % (precision_value, total_length))
def onPbAreaCalcClicked(self):
self.sb = QSpinBox()
precision_value = self.sb.value()
self.cb = QgsMapLayerComboBox(self)
layer = self.cb.currentLayer()
sqmiles_conv = 0.386102159
sqyards_conv = 1195990.05
sqmeters_conv = 1000000
hectares_conv = 100
acres_conv = 10000
if self.rbAreaMeters.isChecked():
total_area = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_area += geometry.area()
total_area = total_area * sqmeters_conv
self.lblAreaResult.setText('%.*f' % (precision_value, total_area))
elif self.rbAreaKilometers.isChecked():
total_area = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_area += geometry.area()
self.lblAreaResult.setText('%.*f' % (precision_value, total_area))
elif self.rbAreaAres.isChecked():
total_area = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_area += geometry.area()
total_area = total_area * acres_conv
self.lblAreaResult.setText('%.*f' % (precision_value, total_area))
elif self.rbAreaHectares.isChecked():
total_area = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_area += geometry.area()
total_area = total_area * hectares_conv
self.lblAreaResult.setText('%.*f' % (precision_value, total_area))
elif self.rbAreaMiles.isChecked():
total_area = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_area += geometry.area()
total_area = total_area * sqmiles_conv
self.lblAreaResult.setText('%.*f' % (precision_value, total_area))
elif self.rbAreaYards.isChecked():
total_area = 0
for feat in layer.getFeatures():
geometry = feat.geometry()
total_area += geometry.area()
total_area = total_area * sqyards_conv
self.lblAreaResult.setText('%.*f' % (precision_value, total_area))
#debug
print(precision_value)
def gotoArea(self):
self.stackedWidget.setCurrentWidget(self.area)
def gotoLength(self):
self.stackedWidget.setCurrentWidget(self.length)
QSpinBox(andQgsMapLayerComboBox) classes every time your slot methods are called, when area/ length calc buttons are clicked. Even when you callprint(QSpinBox().value())you are simply printing the default value of a newQSpinBoxinstance. You should have a spin box and map layer combo boxes in your dialog which you should retrieve and reference via their object names. E.g. I think your combo boxes areself.cbLengthLayerListandself.cbAreaLayerListso reference those objects- don't create new ones! Same with spin box.