def on_scaleCheckBox_clicked(self):
"""
set the earthquake symbols to proportional or standard based on checkbox state
"""
layer = QgsMapLayerRegistry.instance().mapLayersByName("earthquakes")[0]
field = self.scaleComboBox.currentText()
state = self.scaleCheckBox.checkState()
#If checkbox is checked, then set proportional symbols based on the field chosen
if state:
self.scaleComboBox.setEnabled(True)
self.label_17.setEnabled(True)
self.label_16.setEnabled(True)
if field == "Magnitude":
expression = "(Magnitude^3)/10"
elif field == "latitude":
expression = "abs(latitude)/5"
else:
expression = "abs(longitude)/5"
colourManager().propSymbols(layer, expression)
#turn off proportional symbols
else:
colourManager().propSymbols(layer, "2")
self.scaleComboBox.setEnabled(False)
self.label_17.setEnabled(False)
self.label_16.setEnabled(False)
def on_AddAttractionLayer_clicked(self):
"""
add the tourist attraction layer to the mao
"""
#check layer is valid
attractions = AddLayers().CheckAddLayers(self.attractionLineEdit, "tourist_attraction")
# add layer to map canvas
QgsMapLayerRegistry.instance().addMapLayer(attractions)
#if valid, populate the combobox on the next page with types of attraction
if attractions is not None:
attractionTypes = colourManager().getAttributes("LEGEND", attractions)
self.fieldComboBox.addItems(attractionTypes)
colorList = [QColor('#8dd3c7'), QColor('#ffffb3'), QColor('#bebada'), QColor('#fb8072'), QColor('#80b1d3'), QColor('#fdb462'), QColor('#b3de69'), QColor('#fccde5'), QColor('#d9d9d9'), QColor('#bc80bd'), QColor('#ccebc5'), QColor('#ffed6f'), QColor('#6699ff'),QColor('#ff1975'),QColor('#3399ff')]
catList = []
#apply a default colour scheme to the attractions based on attraction type
for attraction in attractionTypes:
colorIndex = attractionTypes.index(attraction)
symbol = QgsSymbolV2.defaultSymbol(attractions.geometryType())
symbol.setColor(colorList[colorIndex])
cat = QgsRendererCategoryV2(attraction, symbol , str(attraction))
catList.append(cat)
renderer = QgsCategorizedSymbolRendererV2("LEGEND", catList)
attractions.setRendererV2(renderer)
#refresh map canvas and legend
iface.mapCanvas().refresh()
iface.legendInterface().refreshLayerSymbology(attractions)
#make a legend table in the plugin
colourManager().makeClassTable(attractions, "LEGEND", self.AttractionTableView)
def on_StyleTypecomboBox_activated(self, p0):
"""
Enable or disable the column/colour ramp comboBoxes or the colour selection button depending on what style type is selected
"""
style = self.StyleTypecomboBox.currentText()
Countries = QgsMapLayerRegistry.instance().mapLayersByName("countries")[0]
if style == "Single Colour":
# Disable the categorised colour categories
self.ColourRampcomboBox.setEnabled(False)
self.ColumncomboBox.setEnabled(False)
self.colourRampLabel.setEnabled(False)
self.columnLabel.setEnabled(False)
#enable the single colour button
self.ChangeColourButton.setEnabled(True)
#set the renderer to single symbol (i.e. all the same)
symbol = QgsSymbolV2.defaultSymbol(Countries.geometryType())
Countries.setRendererV2(QgsSingleSymbolRendererV2(symbol))
#refresh the within-plugin legend
model = QStandardItemModel(0, 0)
model.clear()
self.categoryTableView.setModel(model)
else:
#Enable the categorised colour categories
self.ColourRampcomboBox.setEnabled(True)
self.ColumncomboBox.setEnabled(True)
self.colourRampLabel.setEnabled(True)
self.columnLabel.setEnabled(True)
# disable the single colour button
self.ChangeColourButton.setEnabled(False)
#Populate the countries column comboBox with the layer fields that you can style by
self.ColumncomboBox.clear()
self.ColumncomboBox_2.clear()
self.ColumncomboBox_3.clear()
fields = Countries.pendingFields()
fieldList = []
for field in fields:
fieldList.append(field.name())
self.ColumncomboBox.addItems(fieldList[3:])
self.ColumncomboBox_2.addItems(fieldList[3:])
self.ColumncomboBox_3.addItems(fieldList[3:])
#Ensure that the pop_group item is displayed by default
self.ColumncomboBox_2.setCurrentIndex(2)
#Populate the color ramp combobox with the names of the Color Brewer color ramp schemes
self.ColourRampcomboBox.clear()
self.ColourRampcomboBox_2.clear()
rampNames = QgsVectorColorBrewerColorRampV2.listSchemeNames()
for name in rampNames:
self.ColourRampcomboBox.addItem(name)
self.ColourRampcomboBox_2.addItem(name)
self.ColourRampcomboBox_3.addItem(name)
#self.makeClassTable()
tableViews = [self.categoryTableView, self.categoryTableView_2]
colourManager().makeClassTable(Countries, self.ColumncomboBox, tableViews)
def on_lineColourButton_clicked(self):
"""
Allow the user to select a single colour for the rivers layer
"""
#get the layer name
layerName = self.lineLyrComboBox.currentText()
#update the colour of the layer symbols
colourManager().updateSingleColour(layerName)
def on_buttonBox_accepted(self):
"""
Slot documentation goes here.
"""
if self.svgDict != None:
MagicMarkers().setSVG("tourist_attraction", self.attribute , self.scene, self.svgDict)
attractions = QgsMapLayerRegistry.instance().mapLayersByName("tourist_attraction")[0]
colourManager().makeClassTable(attractions, "LEGEND", self.tableView)
self.close()
def on_scaleComboBox_activated(self, p0):
"""
scale earthquake symbols based on the field chosen in scaleComboBox
"""
layer = QgsMapLayerRegistry.instance().mapLayersByName("earthquakes")[0]
field = self.scaleComboBox.currentText()
#set expression for proportional areas based on chosen field
if field == "Magnitude":
expression = "(Magnitude^3)/10"
elif field == "latitude":
expression = "abs(latitude)/5"
else:
expression = "abs(longitude)/5"
#make symbols proportional
colourManager().propSymbols(layer, expression)
def on_bufferColourButton_clicked(self):
"""
change the colour of the buffer layer
"""
#set up message box
msgBox=QMessageBox()
msgBox.setIcon(3)
#If a buffer layer has been created, update the colours
if self.bufferLayer is not None:
colourManager().updateSingleColour(self.bufferLayer)
#if not bring up a message box
else:
msgBox.setText("Could not re-colour the layer")
msgBox.setInformativeText(" QGISforSchools cannot find the buffer layer. Try going back a step and making a new one.")
msgBox.exec_()
SpatialQuery().populateSrcBox(self.inputComboBox_2, self.refComboBox)
SpatialQuery().populateSrcBox(self.lyrComboBox)
def on_ColumncomboBox_3_activated(self, p0):
"""
Change classified values based on selected column
"""
colourManager().changeColumnColor("countries", self.ColumncomboBox_3, self.ColourRampcomboBox_3)
colourManager().changeColumnColor("obesity", self.obesityColumncomboBox, self.ColourRampcomboBox_3)
colourManager().make3ClassTable("countries", "obesity", self.ColumncomboBox_3, self.obesityColumncomboBox, self.obesityTableView)
def on_ColourRampcomboBox_3_activated(self, p0):
"""
classify the chosen field and colour each class based on the colour ramp selected
"""
colourManager().changeColumnColor("countries", self.ColumncomboBox_3, self.ColourRampcomboBox_3)
colourManager().changeColumnColor("obesity", self.obesityColumncomboBox, self.ColourRampcomboBox_3)
colourManager().make3ClassTable("countries", "obesity", self.ColumncomboBox_3, self.obesityColumncomboBox, self.obesityTableView)
def on_ColourRampcomboBox_activated(self, p0):
"""
classify the chosen field and colour each class based on the colour ramp selected
"""
tableViews = self.earthquakeTableView
colourManager().setGraduatedColour("earthquakes", self.ColumncomboBox, self.ColourRampcomboBox, 5, tableViews)
def on_ChangeColourButton_clicked(self):
"""
Allow the user to select a single colour for the Countries layer
"""
colourManager().updateSingleColour("countries")
def on_ColumncomboBox_2_activated(self, p0):
"""
Change classified values based on selected column
"""
tableViews = [self.categoryTableView, self.categoryTableView_2]
colourManager().changeColumnColor("countries", self.ColumncomboBox_2, self.ColourRampcomboBox_2, tableViews)
def on_ColourRampcomboBox_2_activated(self, p0):
"""
classify the chosen field and colour each class based on the colour ramp selected
"""
tableViews = [self.categoryTableView, self.categoryTableView_2]
colourManager().changeColumnColor("countries", self.ColumncomboBox_2, self.ColourRampcomboBox_2, tableViews)
def on_woodColourButton_clicked(self):
"""
Allow the user to select a single colour for the woodland layer
"""
colourManager().updateSingleColour("woodland", True)
def on_ColumncomboBox_activated(self, p0):
"""
Change classified values based on selected column
"""
tableViews = self.earthquakeTableView
colourManager().setGraduatedColour("earthquakes", self.ColumncomboBox, self.ColourRampcomboBox, 5, tableViews)
def on_stationColour_clicked(self):
"""
Allow the user to select a single colour for the station points
"""
colourManager().updateSingleColour("railway_station")
def on_urbanColourButton_clicked(self):
"""
Allow the user to select a single colour for the buildings layer
"""
colourManager().updateSingleColour("buildings", True)
def on_riverColourButton_clicked(self):
"""
Allow the user to select a single colour for the rivers layer
"""
colourManager().updateSingleColour("rivers")