def handle_function(node, mapLib):
fnIndex = node.fnIndex()
func = QgsExpression.Functions()[fnIndex]
args = node.args().list()
retFunc = (func.name())
retArgs = []
for arg in args:
retArgs.append(walkExpression(arg, mapLib))
retArgs = ",".join(retArgs)
return "fnc_%s([%s], context)" % (retFunc, retArgs)
def handle_function(node, mapLib):
fnIndex = node.fnIndex()
func = QgsExpression.Functions()[fnIndex]
retArgs = []
retFunc = (func.name().replace("$", "_"))
args = node.args()
if args is not None:
args = args.list()
for arg in args:
retArgs.append(walkExpression(arg, mapLib))
retArgs = ",".join(retArgs)
return "fnc_%s([%s], context)" % (retFunc, retArgs)
def get_function(self, function_name):
"""Get an expression function which is already loaded in qgis.
:param function_name: Name of the function.
:type function_name: str
:return: The function.
:rtype: QgsExpressionFunction
.. versionadded:: 4.3
"""
for func in QgsExpression.Functions():
if func.name() == function_name:
return func
return None
def handleFunction(node, layer):
fnIndex = node.fnIndex()
func = QgsExpression.Functions()[fnIndex].name()
if func == "$geometry":
return ["PropertyName", "geom"]
elif func in functions:
elems = [functions[func]]
args = node.args()
if args is not None:
args = args.list()
for arg in args:
elems.append(walkExpression(arg, layer))
return elems
else:
raise UnsupportedExpressionException("Unsupported function in expression: '%s'" % func)
def gen_func_stubs():
"""
Generate function stubs for QGIS functions.
"""
funcs = QgsExpression.Functions()
functions = []
temp = """function %s(values, context) {
return false;
};
"""
for func in funcs:
name = func.name()
if name.startswith("$"):
continue
newfunc = temp % ("fnc_" + name)
functions.append(newfunc)
return "\n".join(functions)
def registerFunctions():
toms_list = QgsExpression.Functions()
for func in functions:
QgsMessageLog.logMessage("Considering function {}".format(func.name()),
tag="TOMs panel")
try:
if func in toms_list:
QgsExpression.unregisterFunction(func.name())
#del toms_list[func.name()]
except AttributeError:
#qgis.toms_functions = dict()
pass
if QgsExpression.registerFunction(func):
QgsMessageLog.logMessage(
"Registered expression function {}".format(func.name()),
tag="TOMs panel")
#qgis.toms_functions[func.name()] = func
"""for title in qgis.toms_functions:
QSpinBox,
QStyledItemDelegate,
)
from qgis.core import QgsExpression
from processing.algs.qgis.ui.FieldsMappingPanel import (
ExpressionDelegate,
FieldsMappingModel,
FieldsMappingPanel,
FieldsMappingWidgetWrapper,
FieldTypeDelegate,
)
AGGREGATES = ['first_value']
for function in QgsExpression.Functions():
if function.name()[0] == '_':
continue
if function.isDeprecated():
continue
# if ( func->isContextual() ):
if "Aggregates" in function.groups():
if function.name() in ('aggregate', 'relation_aggregate'):
continue
AGGREGATES.append(function.name())
AGGREGATES = sorted(AGGREGATES)
class AggregatesModel(FieldsMappingModel):
def configure(self):
self.columns = [{
