def _set_rubber_band(self):
transform = self.canvas.getCoordinateTransform()
rb_center = transform.toMapCoordinates(self.center)
rb_tangent = transform.toMapCoordinates(self.tangent_point)
rb_circle = QgsCircle(
QgsPoint(rb_center.x(), rb_center.y()),
rb_center.distance(rb_tangent.x(), rb_tangent.y()))
circle_geom = QgsGeometry(rb_circle.toPolygon())
if self.rubber_band:
self.rubber_band.reset(QgsWkbTypes.PolygonGeometry)
self.rubber_band.addGeometry(circle_geom)
self.circle = circle_geom
def handleRequest(self, context):
"""Simple Circle"""
values = self.values(context)
x = values['x']
y = values['y']
r = values['r']
f = QgsFeature()
f.setAttributes([x, y, r])
f.setGeometry(QgsCircle(QgsPoint(x, y), r).toCircularString())
exporter = QgsJsonExporter()
self.write(json.loads(exporter.exportFeature(f)), context)
def testQgsCircleRepr(self):
c = QgsCircle(QgsPoint(1, 1), 2.0)
self.assertEqual(
c.__repr__(),
'<QgsCircle: Circle (Center: Point (1 1), Radius: 2, Azimuth: 0)>')
def geomFromType(points, parameters, geomtype, layerType):
"""
Returns the geometry from a points list, with parameters for the specific
geometry type to the layer type
Parameters
----------
points: list of coordinates
Contains at least one point
parameters: list
Can be empty, else it's a string needed for some geometry type
geomtype: int
Identifiant of the type of geometry
(Circle from 2 points, Circle from center and diameter, etc.)
layerType: int
QGIS identifiant of the layer type
(0: Point, 1: LineString, 2: Polygon)
"""
if (geomtype == "Circle2Points"):
try:
geom = QgsCircle.from2Points(QgsPoint(*[float(f) for
f in points[0]]),
QgsPoint(*[float(f) for
f in points[1]]))
if layerType == 0:
return QgsGeometry(geom.center())
elif layerType == 1:
return QgsGeometry(geom.toLineString())
else:
return QgsGeometry(geom.toPolygon())
except:
return None
elif (geomtype == "Circle3Points"):
try:
geom = QgsCircle.from3Points(QgsPoint(*[float(f) for
f in points[0]]),
QgsPoint(*[float(f) for
f in points[1]]),
QgsPoint(*[float(f) for
f in points[2]]))
if layerType == 0:
return QgsGeometry(geom.center())
elif layerType == 1:
return QgsGeometry(geom.toLineString())
else:
return QgsGeometry(geom.toPolygon())
except:
return None
elif (geomtype == "CircleCenterRadius"):
try:
geom = QgsCircle.fromCenterDiameter(QgsPoint(*[float(f) for
f in points[0]]),
float(parameters[0]) * 2.0)
if layerType == 0:
return QgsGeometry(geom.center())
elif layerType == 1:
return QgsGeometry(geom.toLineString())
else:
return QgsGeometry(geom.toPolygon())
except:
return None
elif (geomtype == "CircleCenterDiameter"):
try:
geom = QgsCircle.fromCenterDiameter(QgsPoint(*[float(f) for
f in points[0]]),
float(parameters[0]))
if layerType == 0:
return QgsGeometry(geom.center())
elif layerType == 1:
return QgsGeometry(geom.toLineString())
else:
return QgsGeometry(geom.toPolygon())
except:
return None
elif (geomtype == "Square2Points"):
try:
geom = QgsRegularPolygon(QgsPoint(*[float(f) for f in points[0]]),
QgsPoint(*[float(f) for f in points[1]]),
4)
if layerType == 0:
return QgsGeometry(geom.center())
elif layerType == 1:
return QgsGeometry(geom.toLineString())
else:
return QgsGeometry(geom.toPolygon())
except:
return None
elif (geomtype == "Square2Diagonal"):
# TODO: QgsRegularPolygon?
return None
elif (geomtype == "Rectangle2PointsHeight"):
# TODO: projection des points suivant azimuth entre
# points[0] et points[1]?
return None
elif (geomtype == "Rectangle3PointsDistance"):
# TODO: voir code maptools
return None
elif (geomtype == "Rectangle3PointsProjected"):
# TODO: voir code maptools
return None
elif (geomtype == "Line"):
if layerType == 0:
return None
nb = len(points)
if nb < 2:
return None
line = []
for p in points:
line.append(QgsPoint(*[float(f) for f in p]))
if layerType == 1:
return QgsGeometry.fromPolyline(line)
else:
if line[0] != line[nb - 1]:
line.append(line[0])
p = QgsPolygon()
p.setExteriorRing(QgsLineString(line))
return QgsGeometry(p)
return None
elif (geomtype == "Point"):
try:
if layerType == 0:
return QgsGeometry(QgsPoint(*[float(f) for f in points[0]]))
else:
return None
except:
return None
return None
def testQgsCircleRepr(self):
c = QgsCircle(QgsPoint(1, 1), 2.0)
self.assertEqual(c.__repr__(), '<QgsCircle: Circle (Center: Point (1 1), Radius: 2, Azimuth: 0)>')
