class LegendItemCircle(ColorIndicator):
"""Legend circle item.
The legend circle item is a small colored circle image that can be plugged
into the legend in front of the text object.
This should only really be used in conjunction with ˙LegendItem˙.
Parameters
----------
color : QColor
The color of the square.
parent : QGraphicsItem
See Also
--------
LegendItemSquare
"""
SIZE = QSizeF(12, 12)
_size_hint = SIZE
def __init__(self, color, parent):
super().__init__(parent)
height, width = self.SIZE.height(), self.SIZE.width()
self.__circle = QGraphicsEllipseItem(0, 0, height, width)
self.__circle.setBrush(QBrush(color))
self.__circle.setPen(QPen(QColor(0, 0, 0, 0)))
self.__circle.setParentItem(self)
self._size_hint = QSizeF(self.__circle.boundingRect().size())
def sizeHint(self, size_hint, size_constraint=None, *args, **kwargs):
return self._size_hint
class LegendItemCircle(ColorIndicator):
"""Legend circle item.
The legend circle item is a small colored circle image that can be plugged
into the legend in front of the text object.
This should only really be used in conjunction with ˙LegendItem˙.
Parameters
----------
color : QColor
The color of the square.
parent : QGraphicsItem
See Also
--------
LegendItemSquare
"""
SIZE = QSizeF(12, 12)
_size_hint = SIZE
def __init__(self, color, parent):
super().__init__(parent)
height, width = self.SIZE.height(), self.SIZE.width()
self.__circle = QGraphicsEllipseItem(0, 0, height, width)
self.__circle.setBrush(QBrush(color))
self.__circle.setPen(QPen(QColor(0, 0, 0, 0)))
self.__circle.setParentItem(self)
self._size_hint = QSizeF(self.__circle.boundingRect().size())
def sizeHint(self, size_hint, size_constraint=None, *args, **kwargs):
return self._size_hint
def place_point(_x, _y, _c):
item = QGraphicsEllipseItem()
item.setX(_x)
item.setY(_y)
item.setRect(0, 0, self.POINT_R, self.POINT_R)
color = QColor(*_c)
item.setPen(QPen(color))
item.setBrush(QBrush(color))
self._group.addToGroup(item)
def put_point(_x, _y):
item = QGraphicsEllipseItem()
item.setX(_x)
item.setY(_y)
item.setRect(0, 0, self.POINT_R, self.POINT_R)
color = QColor(*colors.pop().astype(int))
item.setPen(QPen(color))
item.setBrush(QBrush(color))
self.__group.addToGroup(item)
def pie_chart(self, x, y, r, dist, colors):
start_angle = 0
dist = np.asarray(dist)
spans = dist / (float(np.sum(dist)) or 1) * 360 * 16
for span, color in zip(spans, colors):
if not span:
continue
if self.explode:
mid_ang = (start_angle + span / 2) / 360 / 16 * 2 * pi
dx = r / 30 * cos(mid_ang)
dy = r / 30 * sin(mid_ang)
else:
dx = dy = 0
ellipse = QGraphicsEllipseItem(x - r / 2 + dx, y - r / 2 - dy, r, r)
if len(spans) > 1:
ellipse.setStartAngle(start_angle)
ellipse.setSpanAngle(span)
ellipse.setBrush(QColor(*color))
self.scene.addItem(ellipse)
start_angle += span
def pie_chart(self, x, y, r, dist, colors):
start_angle = 0
dist = np.asarray(dist)
spans = dist / (float(np.sum(dist)) or 1) * 360 * 16
for span, color in zip(spans, colors):
if not span:
continue
if self.explode:
mid_ang = (start_angle + span / 2) / 360 / 16 * 2 * pi
dx = r / 30 * cos(mid_ang)
dy = r / 30 * sin(mid_ang)
else:
dx = dy = 0
ellipse = QGraphicsEllipseItem(x - r / 2 + dx, y - r / 2 - dy, r,
r)
if len(spans) > 1:
ellipse.setStartAngle(start_angle)
ellipse.setSpanAngle(span)
ellipse.setBrush(QColor(*color))
self.scene.addItem(ellipse)
start_angle += span
class CircleCurve(OWCurve):
"""
Displays a circle on the plot
:param pen: The pen used to draw the outline of the circle
:type pen: QPen
:param brush: The brush used to paint the inside of the circle
:type brush: QBrush
:param xCenter: The x coordinate of the circle's center
:type xCenter: float
:param yCenter: The y coordinate of the circle's center
:type yCenter: float
:param radius: The circle's radius
:type radius: float
"""
def __init__(self, pen = QPen(Qt.black), brush = QBrush(Qt.NoBrush), xCenter = 0.0, yCenter = 0.0, radius = 1.0):
OWCurve.__init__(self)
self._item = QGraphicsEllipseItem(self)
self.center = xCenter, yCenter
self.radius = radius
self._rect = QRectF(xCenter-radius, yCenter-radius, 2*radius, 2*radius)
self.set_pen(pen)
self.set_brush(brush)
def update_properties(self):
self._item.setRect(self.graph_transform().mapRect(self.data_rect()))
self._item.setPen(self.pen())
self._item.setBrush(self.brush())
def data_rect(self):
x, y = self.center
r = self.radius
return QRectF(x-r, y-r, 2*r, 2*r)