def showQueryBuilder(gtoObj, debug, *args, **kwargs):
try:
iface = gtoObj.iface
info = gtoObj.info
layer = iface.activeLayer()
query_builder = QgsQueryBuilder(layer, iface.mainWindow())
query_builder.show()
except Exception as e:
info.err(e)
pr = vl.dataProvider()
# add fields
pr.addAttributes([QgsField("name", QVariant.String), QgsField("age", QVariant.Int), QgsField("size", QVariant.Double)])
vl.updateFields() # tell the vector layer to fetch changes from the provider
infos = [
[10, 10, "John", 24, 1.73],
[40, -60, "Paul", 29, 1.86],
[60, 5, "George", 34, 1.69],
[0, 45, "Ringo", 73, 1.75],
]
# add features
for i in infos:
fet = QgsFeature()
fet.setGeometry(QgsGeometry.fromPoint(QgsPoint(i[0], i[1])))
fet.setAttributes(i[2:5])
pr.addFeatures([fet])
# update layer's extent when new features have been added
# because change of extent in provider is not propagated to the layer
vl.updateExtents()
QgsMapLayerRegistry.instance().addMapLayer(vl)
query_builder = QgsQueryBuilder(vl)
query_builder.setSql(u'"age" > 30')
query_builder.accept()
query_builder.show()
pr = vl.dataProvider()
# add fields
pr.addAttributes([
QgsField("name", QVariant.String),
QgsField("age", QVariant.Int),
QgsField("size", QVariant.Double)
])
vl.updateFields() # tell the vector layer to fetch changes from the provider
infos = [[10, 10, "John", 24, 1.73], [40, -60, "Paul", 29, 1.86],
[60, 5, "George", 34, 1.69], [0, 45, "Ringo", 73, 1.75]]
# add features
for i in infos:
fet = QgsFeature()
fet.setGeometry(QgsGeometry.fromPoint(QgsPoint(i[0], i[1])))
fet.setAttributes(i[2:5])
pr.addFeatures([fet])
# update layer's extent when new features have been added
# because change of extent in provider is not propagated to the layer
vl.updateExtents()
QgsMapLayerRegistry.instance().addMapLayer(vl)
query_builder = QgsQueryBuilder(vl)
query_builder.setSql(u'"age" > 30')
query_builder.accept()
query_builder.show()