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layer_settings.py
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layer_settings.py
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__author__ = 'carolinux'
"""Helper functions that manage getting layer settings from a variety of sources - the timelayer
layer, the addLayerOptions gui, the widget table and the save string"""
from qgis.core import *
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from time_util import PENDING
import conf
import time_util
def textToBool(text):
if text.lower() == "false":
return False
if text.lower() == "true":
return True
raise Exception("Invalid boolean string {}".format(text))
class LayerSettings:
def __init__(self):
self.layer = None
self.layerName = ''
self.layerId = ''
self.startTimeAttribute = ''
self.endTimeAttribute = ''
self.isEnabled = True
self.timeFormat = time_util.PENDING
self.offset = 0
self.interpolationEnabled = False
self.interpolationMode = conf.NO_INTERPOLATION
self.idAttribute = ''
self.subsetStr = ''
self.geometriesCount = True
self.accumulate = False
def getSettingsFromSaveStr(saveStr):
l = saveStr.split(conf.SAVE_DELIMITER)
result = LayerSettings()
result.layerId = l[0]
result.layer = QgsMapLayerRegistry.instance().mapLayer(result.layerId) # get the layer
result.startTimeAttribute = l[2]
result.subsetStr = l[1]
result.endTimeAttribute = l[3]
result.isEnabled = textToBool(l[4])
result.timeFormat = l[5]
try:
result.offset = int(l[6])
result.idAttribute = l[7]
result.interpolationEnabled = textToBool(l[8])
result.interpolationMode = l[9]
result.geometriesCount = l[10]
result.accumulate = textToBool(l[11])
except IndexError: # for backwards compatibility
pass # this will use default values
return result
def extractEndTimeSettings(ui, startTime):
""" Get the settings for endtime from the ui, according
to how comboBoxEnd is initialized in vectorlayerdialog"""
if ui.comboBoxEnd.currentIndex() == 0:
return startTime, False
if ui.comboBoxEnd.currentIndex() == 1:
return "", True
return ui.comboBoxEnd.currentText(), False
def getSettingsFromAddVectorLayersUI(ui, layerIndexToId):
result = LayerSettings()
result.layerName = ui.comboBoxLayers.currentText()
result.startTimeAttribute = ui.comboBoxStart.currentText()
result.endTimeAttribute, result.accumulate = extractEndTimeSettings(ui,
result.startTimeAttribute)
result.isEnabled = True
result.layerId = layerIndexToId[ui.comboBoxLayers.currentIndex()]
result.timeFormat = time_util.PENDING
result.offset = ui.spinBoxOffset.value()
result.interpolationMode = ui.comboBoxInterpolation.currentText()
result.interpolationEnabled = conf.INTERPOLATION_MODES[result.interpolationMode]
result.idAttribute = ui.comboBoxID.currentText() if result.interpolationEnabled else None
result.idAttribute = "" if result.idAttribute == conf.NO_ID_TEXT else result.idAttribute
result.geometriesCount = not ui.exportEmptyCheckbox.checkState() == Qt.Checked
return result
def getSettingsFromAddRasterLayersUI(ui, layerIndexToId):
result = LayerSettings()
result.layerName = ui.comboBoxLayers.currentText()
result.startTimeAttribute = ui.textStart.text()
result.endTimeAttribute = ui.textEnd.text()
result.isEnabled = True
result.layerId = layerIndexToId[ui.comboBoxLayers.currentIndex()]
result.timeFormat = time_util.PENDING if ui.isCDF.checkState() != Qt.Checked else time_util.NETCDF_BAND
result.offset = ui.spinBoxOffset.value()
return result
def addSettingsToRow(settings, out_table):
s = settings
row = out_table.rowCount()
out_table.insertRow(row)
s = settings
# insert values
for i, value in enumerate([s.layerName, s.startTimeAttribute, s.endTimeAttribute,
s.isEnabled, s.layerId, s.timeFormat,
str(s.offset), s.interpolationEnabled, s.idAttribute,
s.interpolationMode,
not s.geometriesCount, s.accumulate]):
item = QTableWidgetItem()
if type(value) != bool:
item.setText(value)
else:
item.setCheckState(Qt.Checked if value else Qt.Unchecked)
out_table.setItem(row, i, item)
def getSettingsFromRow(table, rowNum):
"""Get settings from table widget rowNum"""
result = LayerSettings()
result.layer = QgsMapLayerRegistry.instance().mapLayer(table.item(rowNum, 4).text())
try:
result.subsetStr = result.layer.subsetString()
except:
# raster layers do not have subset strings
pass
result.isEnabled = (table.item(rowNum, 3).checkState() ==
Qt.Checked)
# offset
result.offset = int(table.item(rowNum, 6).text()) # currently
result.startTimeAttribute = table.item(rowNum, 1).text()
result.endTimeAttribute = table.item(rowNum, 2).text()
# time format
result.timeFormat = table.item(rowNum, 5).text()
result.interpolationEnabled = (table.item(rowNum, 7).checkState() == Qt.Checked)
result.idAttribute = table.item(rowNum, 8).text()
result.interpolationMode = table.item(rowNum, 9).text()
result.geometriesCount = not (table.item(rowNum, 10).checkState() == Qt.Checked)
result.accumulate = (table.item(rowNum, 11).checkState() == Qt.Checked)
return result
def getSettingsFromLayer(layer):
"""Get the timelayer's settings as a tuple"""
result = LayerSettings()
result.layer = layer
result.layerName = layer.getName()
result.isEnabled = layer.isEnabled()
result.layerId = layer.getLayerId()
result.offset = layer.getOffset()
result.subsetStr = layer.getOriginalSubsetString()
times = layer.getTimeAttributes()
result.startTimeAttribute = times[0]
result.endTimeAttribute = times[1]
result.timeFormat = layer.getTimeFormat()
result.interpolationEnabled = layer.isInterpolationEnabled()
result.interpolationMode = layer.interpolationMode()
if result.interpolationEnabled:
result.idAttribute = "" if not layer.hasIdAttribute() else layer.getIdAttribute()
else:
result.idAttribute = ""
result.geometriesCount = layer.geometriesCountForExport()
result.accumulate = layer.accumulateFeatures()
return result