class ParallelOffset:
def __init__(self, iface):
# Save reference to the QGIS interface
self.iface = iface
# initialize plugin directory
self.plugin_dir = QFileInfo(QgsApplication.qgisUserDbFilePath()).path(
) + "/python/plugins/paralleloffset"
# initialize locale
localePath = ""
locale = QSettings().value("locale/userLocale")[0:2]
if QFileInfo(self.plugin_dir).exists():
localePath = self.plugin_dir + "/i18n/paralleloffset_" + locale + ".qm"
if QFileInfo(localePath).exists():
self.translator = QTranslator()
self.translator.load(localePath)
if qVersion() > '4.3.3':
QCoreApplication.installTranslator(self.translator)
# Create the dialog (after translation) and keep reference
self.dlg = ParallelOffsetDialog()
def initGui(self):
# Create action that will start plugin configuration
self.action = QAction(QIcon(":/plugins/paralleloffset/icon.png"),
u"Line Offset", self.iface.mainWindow())
# connect the action to the run method
QObject.connect(self.action, SIGNAL("triggered()"), self.run)
# Add toolbar button and menu item
self.iface.addToolBarIcon(self.action)
self.iface.addPluginToMenu(u"&Line Offset", self.action)
def unload(self):
# Remove the plugin menu item and icon
self.iface.removePluginMenu(u"&Line Offset", self.action)
self.iface.removeToolBarIcon(self.action)
# run method that performs all the real work
def run(self):
# show the dialog
self.dlg.show()
# Run the dialog event loop
result = self.dlg.exec_()
# See if OK was pressed
if result == 1:
layers = iface.legendInterface().layers()
if len(layers) != 0:
#Check that there is a selected layer
layer = iface.mapCanvas().currentLayer()
if layer.type() == 0:
#check selected layer is a vector layer
if layer.geometryType() == 1:
#check to see if selected layer is a linestring geometry
if len(layer.selectedFeatures()) != 0:
#Dir = float(self.dlg.ui.radLeft.isChecked()
layers = iface.legendInterface().layers()
Lexists = "false"
#check to see if the virtual layer already exists
for layer in layers:
if layer.name() == "Parallel_Offset":
Lexists = "true"
vl = layer
#if it doesn't exist create it
if Lexists == "false":
vl = QgsVectorLayer(
"Linestring?field=offset:integer&field=direction:string(10)&field=method:string(10)",
"Parallel_Offset", "memory")
#vl = QgsVectorLayer("Linestring", "Parallel_Offset", "memory")
pr = vl.dataProvider()
vl.startEditing()
#pr.addAttributes( [ QgsField("offset", Double), QgsField("direction", String), QgsField("method", String) ] )
else:
pr = vl.dataProvider()
vl.startEditing()
#get the direction
Dir = 'right'
if self.dlg.ui.radLeft.isChecked():
Dir = 'left'
#get the method
if self.dlg.ui.radRound.isChecked():
js = 1
if self.dlg.ui.radMitre.isChecked():
js = 2
if self.dlg.ui.radBevel.isChecked():
js = 3
#get the offset
loffset = float(self.dlg.ui.txtDistance.text())
#create the new feature from the selection
for feature in layer.selectedFeatures():
geom = feature.geometry()
h = geom.asPolyline()
line = LineString(h)
nline = line.parallel_offset(loffset,
Dir,
resolution=16,
join_style=js,
mitre_limit=10.0)
#turn nline back into a polyline and add it to the map as a new layer.
fet = QgsFeature()
fet.setGeometry(QgsGeometry.fromWkt(
str(nline)))
fet.setAttributes([loffset, Dir, js])
pr.addFeatures([fet])
vl.commitChanges()
QgsMapLayerRegistry.instance().addMapLayer(vl)
mc = self.iface.mapCanvas()
mc.refresh()
class ParallelOffset:
def __init__(self, iface):
# Save reference to the QGIS interface
self.iface = iface
# initialize plugin directory
self.plugin_dir = QFileInfo(QgsApplication.qgisUserDbFilePath()).path() + "/python/plugins/paralleloffset"
# initialize locale
localePath = ""
locale = QSettings().value("locale/userLocale")[0:2]
if QFileInfo(self.plugin_dir).exists():
localePath = self.plugin_dir + "/i18n/paralleloffset_" + locale + ".qm"
if QFileInfo(localePath).exists():
self.translator = QTranslator()
self.translator.load(localePath)
if qVersion() > '4.3.3':
QCoreApplication.installTranslator(self.translator)
# Create the dialog (after translation) and keep reference
self.dlg = ParallelOffsetDialog()
def initGui(self):
# Create action that will start plugin configuration
self.action = QAction(
QIcon(":/plugins/paralleloffset/icon.png"),
u"Line Offset", self.iface.mainWindow())
# connect the action to the run method
QObject.connect(self.action, SIGNAL("triggered()"), self.run)
# Add toolbar button and menu item
self.iface.addToolBarIcon(self.action)
self.iface.addPluginToMenu(u"&Line Offset", self.action)
def unload(self):
# Remove the plugin menu item and icon
self.iface.removePluginMenu(u"&Line Offset", self.action)
self.iface.removeToolBarIcon(self.action)
# run method that performs all the real work
def run(self):
# show the dialog
self.dlg.show()
# Run the dialog event loop
result = self.dlg.exec_()
# See if OK was pressed
if result == 1:
layers = iface.legendInterface().layers()
if len(layers) != 0:
#Check that there is a selected layer
layer = iface.mapCanvas().currentLayer()
if layer.type() == 0:
#check selected layer is a vector layer
if layer.geometryType() == 1:
#check to see if selected layer is a linestring geometry
if len(layer.selectedFeatures()) != 0:
#Dir = float(self.dlg.ui.radLeft.isChecked()
layers = iface.legendInterface().layers()
Lexists = "false"
#check to see if the virtual layer already exists
for layer in layers:
if layer.name() == "Parallel_Offset":
Lexists = "true"
vl = layer
#if it doesn't exist create it
if Lexists == "false":
vl = QgsVectorLayer("Linestring?field=offset:integer&field=direction:string(10)&field=method:string(10)","Parallel_Offset","memory")
#vl = QgsVectorLayer("Linestring", "Parallel_Offset", "memory")
pr = vl.dataProvider()
vl.startEditing()
#pr.addAttributes( [ QgsField("offset", Double), QgsField("direction", String), QgsField("method", String) ] )
else:
pr = vl.dataProvider()
vl.startEditing()
#get the direction
Dir = 'right'
if self.dlg.ui.radLeft.isChecked():
Dir = 'left'
#get the method
if self.dlg.ui.radRound.isChecked():
js = 1
if self.dlg.ui.radMitre.isChecked():
js = 2
if self.dlg.ui.radBevel.isChecked():
js = 3
#get the offset
loffset = float(self.dlg.ui.txtDistance.text())
#create the new feature from the selection
for feature in layer.selectedFeatures():
geom = feature.geometry()
h = geom.asPolyline()
line = LineString(h)
nline = line.parallel_offset(loffset, Dir,resolution=16,join_style=js,mitre_limit=10.0)
#turn nline back into a polyline and add it to the map as a new layer.
fet = QgsFeature()
fet.setGeometry(QgsGeometry.fromWkt(str(nline)))
fet.setAttributes( [loffset,Dir ,js] )
pr.addFeatures( [ fet ] )
vl.commitChanges()
QgsMapLayerRegistry.instance().addMapLayer(vl)
mc=self.iface.mapCanvas()
mc.refresh()