class PolygonSimplifierDialog(QtGui.QDialog, FORM_CLASS):
def __init__(self, iface, parent=None):
"""Constructor."""
super(PolygonSimplifierDialog, self).__init__(parent)
# Set up the user interface from Designer.
# After setupUI you can access any designer object by doing
# self.<objectname>, and you can use autoconnect slots - see
# http://qt-project.org/doc/qt-4.8/designer-using-a-ui-file.html
# #widgets-and-dialogs-with-auto-connect
self.setupUi(self)
# Connecting slots.
self.browseButton.clicked.connect(self.showBrowserDialog)
self.preserveTopology.stateChanged['int'].connect(
self.enableMinimumPolygonSize)
self.algorithms.currentIndexChanged['QString'].connect(
self.changeToleranceLabelText)
def showBrowserDialog(self):
"""Shows a file browser dialog to enter the output path."""
fileName = QFileDialog.getSaveFileName(None, 'Save output shapefile',
'', 'Shapefiles (*.shp *.SHP)')
self.outputPath.setText(fileName)
def enableMinimumPolygonSize(self, state):
"""Enables the Minimum polygon size checkbox according to the specified state."""
if state == 2:
self.minimumPolygonSize.setEnabled(False)
else:
self.minimumPolygonSize.setEnabled(True)
def changeToleranceLabelText(self, algorithmName):
if algorithmName == "Ramer-Douglas-Peucker":
self.toleranceLabel.setText("Epsilon value:")
if algorithmName == "Visvalingam-Whyatt":
self.toleranceLabel.setText("Area threshold:")
if algorithmName == "Whirlpool":
self.toleranceLabel.setText("Neighbour distance:")
def loadLayers(self, iface):
"""Reads currently loaded layers from QGIS"""
self.iface = iface
self.layerCollectionReader = LayerCollectionReader(self.iface)
self.layers.clear()
self.layers.addItems(self.layerCollectionReader.getLayerNames())
# Return true if any layer is loaded.
if self.layers.count() > 0:
return True
else:
return False
def getSelectedLayer(self):
"""Returns the layer object according to the selected layer name on the dialog."""
layerName = self.layers.currentText()
selectedLayer = self.layerCollectionReader.getLayerByName(layerName)
return selectedLayer
def loadLayers(self, iface):
"""Reads currently loaded layers from QGIS"""
self.iface = iface
self.layerCollectionReader = LayerCollectionReader(self.iface)
self.layers.clear()
self.layers.addItems(self.layerCollectionReader.getLayerNames())
# Return true if any layer is loaded.
if self.layers.count() > 0:
return True
else:
return False
class PolygonSimplifierDialog(QtGui.QDialog, FORM_CLASS):
def __init__(self, iface, parent=None):
"""Constructor."""
super(PolygonSimplifierDialog, self).__init__(parent)
# Set up the user interface from Designer.
# After setupUI you can access any designer object by doing
# self.<objectname>, and you can use autoconnect slots - see
# http://qt-project.org/doc/qt-4.8/designer-using-a-ui-file.html
# #widgets-and-dialogs-with-auto-connect
self.setupUi(self)
# Connecting slots.
self.browseButton.clicked.connect(self.showBrowserDialog)
self.preserveTopology.stateChanged['int'].connect(self.enableMinimumPolygonSize)
self.algorithms.currentIndexChanged['QString'].connect(self.changeToleranceLabelText)
def showBrowserDialog(self):
"""Shows a file browser dialog to enter the output path."""
fileName = QFileDialog.getSaveFileName(None, 'Save output shapefile','','Shapefiles (*.shp *.SHP)')
self.outputPath.setText(fileName)
def enableMinimumPolygonSize(self, state):
"""Enables the Minimum polygon size checkbox according to the specified state."""
if state == 2:
self.minimumPolygonSize.setEnabled(False)
else:
self.minimumPolygonSize.setEnabled(True)
def changeToleranceLabelText(self, algorithmName):
if algorithmName == "Ramer-Douglas-Peucker":
self.toleranceLabel.setText("Epsilon value:")
if algorithmName == "Visvalingam-Whyatt":
self.toleranceLabel.setText("Area threshold:")
if algorithmName == "Whirlpool":
self.toleranceLabel.setText("Neighbour distance:")
def loadLayers(self, iface):
"""Reads currently loaded layers from QGIS"""
self.iface = iface
self.layerCollectionReader = LayerCollectionReader(self.iface)
self.layers.clear()
self.layers.addItems(self.layerCollectionReader.getLayerNames())
# Return true if any layer is loaded.
if self.layers.count() > 0:
return True
else:
return False
def getSelectedLayer(self):
"""Returns the layer object according to the selected layer name on the dialog."""
layerName = self.layers.currentText()
selectedLayer = self.layerCollectionReader.getLayerByName(layerName)
return selectedLayer
def loadLayers(self, iface):
"""Reads currently loaded layers from QGIS"""
self.iface = iface
self.layerCollectionReader = LayerCollectionReader(self.iface)
self.layers.clear()
self.layers.addItems(self.layerCollectionReader.getLayerNames())
# Return true if any layer is loaded.
if self.layers.count() > 0:
return True
else:
return False
