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[processing] warn if extent might not be in the expected CRS

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volaya authored and alexbruy committed Oct 18, 2016
1 parent b4562d1 commit b83fbb16c921943823a29d8cfb296abf1e1901c6
@@ -60,6 +60,7 @@ class ProcessingConfig(object):
POST_EXECUTION_SCRIPT = 'POST_EXECUTION_SCRIPT'
SHOW_CRS_DEF = 'SHOW_CRS_DEF'
WARN_UNMATCHING_CRS = 'WARN_UNMATCHING_CRS'
WARN_UNMATCHING_EXTENT_CRS = 'WARN_UNMATCHING_EXTENT_CRS'
DEFAULT_OUTPUT_RASTER_LAYER_EXT = 'DEFAULT_OUTPUT_RASTER_LAYER_EXT'
DEFAULT_OUTPUT_VECTOR_LAYER_EXT = 'DEFAULT_OUTPUT_VECTOR_LAYER_EXT'
SHOW_PROVIDERS_TOOLTIP = "SHOW_PROVIDERS_TOOLTIP"
@@ -108,6 +109,10 @@ def initialize():
ProcessingConfig.tr('General'),
ProcessingConfig.WARN_UNMATCHING_CRS,
ProcessingConfig.tr("Warn before executing if layer CRS's do not match"), True))
ProcessingConfig.addSetting(Setting(
ProcessingConfig.tr('General'),
ProcessingConfig.WARN_UNMATCHING_EXTENT_CRS,
ProcessingConfig.tr("Warn before executing if extent CRS might not match layers CRS"), True))
ProcessingConfig.addSetting(Setting(
ProcessingConfig.tr('General'),
ProcessingConfig.RASTER_STYLE,
@@ -48,6 +48,9 @@
from processing.core.outputs import OutputTable


from qgis.utils import iface


class AlgorithmDialog(AlgorithmDialogBase):

def __init__(self, alg):
@@ -100,6 +103,37 @@ def setParamValues(self):
def setParamValue(self, param, wrapper, alg=None):
return param.setValue(wrapper.value())

def checkExtentCRS(self):
unmatchingCRS = False
hasExtent = False
projectCRS = iface.mapCanvas().mapSettings().destinationCrs()
layers = dataobjects.getAllLayers()
for param in self.alg.parameters:
if isinstance(param, (ParameterRaster, ParameterVector, ParameterMultipleInput)):
if param.value:
if isinstance(param, ParameterMultipleInput):
inputlayers = param.value.split(';')
else:
inputlayers = [param.value]
for inputlayer in inputlayers:
for layer in layers:
if layer.source() == inputlayer:
if layer.crs() != projectCRS:
unmatchingCRS = True

p = dataobjects.getObjectFromUri(inputlayer)
if p is not None:
if p.crs() != projectCRS:
unmatchingCRS = True
if isinstance(param, ParameterExtent):
value = self.mainWidget.valueItems[param.name].leText.text().strip()
print value
if value:
hasExtent = True

return hasExtent and unmatchingCRS


def accept(self):
self.settings.setValue("/Processing/dialogBase", self.saveGeometry())

@@ -115,6 +149,17 @@ def accept(self):
QMessageBox.No)
if reply == QMessageBox.No:
return
checkExtentCRS = ProcessingConfig.getSetting(ProcessingConfig.WARN_UNMATCHING_EXTENT_CRS)
if checkExtentCRS and self.checkExtentCRS():
reply = QMessageBox.question(self, self.tr("Extent CRS"),
self.tr('Extent parameters must use the same CRS as the input layers.\n'
'Your input layers do not have the same extent as the project, '
'so the extent might be in a wrong CRS if you have selected it from the canvas.\n'
'Do you want to continue?'),
QMessageBox.Yes | QMessageBox.No,
QMessageBox.No)
if reply == QMessageBox.No:
return
msg = self.alg._checkParameterValuesBeforeExecuting()
if msg:
QMessageBox.warning(

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