class SelectLayersToMergeDialog(QDialog):
"""
Modal dialog giving to the user the possibility to select
a layer containing loss data and one containing SVI data, that will be
joined in the SVIR layer
"""
def __init__(self):
QDialog.__init__(self)
# Set up the user interface from Designer.
self.ui = Ui_SelectLayersToMergeDialog()
self.ui.setupUi(self)
self.ok_button = self.ui.buttonBox.button(QDialogButtonBox.Ok)
@pyqtSlot(str)
def on_loss_layer_cbox_currentIndexChanged(self):
self.reload_aggr_loss_attrib_and_merge_attr_cbx()
def reload_aggr_loss_attrib_and_merge_attr_cbx(self):
self.ui.aggr_loss_attr_cbox.clear()
self.ui.merge_attr_cbx.clear()
# populate attribute combo boxes with the list of attributes of the
# layer specified in the loss_layer combo box
layer = QgsMapLayerRegistry.instance().mapLayers().values()[
self.ui.loss_layer_cbox.currentIndex()]
# populate combo boxes with field names taken by layers
dp = layer.dataProvider()
fields = list(dp.fields())
no_numeric_fields = True
no_string_fields = True
for field in fields:
# add to loss attribute cbx numeric fields only
if field.typeName() in NUMERIC_FIELD_TYPES:
self.ui.aggr_loss_attr_cbox.addItem(field.name())
no_numeric_fields = False
# add to merge attribute cbx string fields only
if field.typeName() in TEXTUAL_FIELD_TYPES:
self.ui.merge_attr_cbx.addItem(field.name())
no_string_fields = False
self.ok_button.setDisabled(no_numeric_fields)
self.ok_button.setDisabled(no_string_fields)
def __init__(self):
QDialog.__init__(self)
# Set up the user interface from Designer.
self.ui = Ui_SelectLayersToMergeDialog()
self.ui.setupUi(self)
self.ok_button = self.ui.buttonBox.button(QDialogButtonBox.Ok)