def _to_qgraphicstextitem(self):
t = QGraphicsTextItem()
t.setDefaultTextColor(QColor(self.color.hexcolor))
if self.html:
text = self.text.replace(u'\n', u'<br />')
t.setHtml(u'<div align="center">%s</div>' %
text if self.center else text)
else:
t.setPlainText(self.text)
mw = self.max_width
if mw is None:
if self.uniform_coordinates:
mw = self._canvas.width // 2 - self.x
else:
mw = self._canvas.width - self.x
if self.center:
mw *= 2
t.setTextWidth(mw)
f = QFont(self.font_family,
weight=QFont.Bold if self.font_bold else QFont.Normal,
italic=self.font_italic)
for family, substitute in font_substitutions:
f.insertSubstitution(substitute, family)
f.setPixelSize(self.font_size)
t.setFont(f)
return t
class DataNode:
def __init__(self, data, radius=15):
self.data = data
# Add circular node
self.node = QGraphicsEllipseItem(0, 0, 1, 1)
# Set radius
self.radius = radius
# Add text label
self.label = QGraphicsTextItem(data.label)
font = self.label.font()
font.setPointSize(10)
self.label.setFont(font)
# Add line between label and node
self.line1 = QGraphicsLineItem(0, 0, 1, 1)
self.line2 = QGraphicsLineItem(0, 0, 1, 1)
self.node.setZValue(20)
self.label.setZValue(10)
self.line1.setZValue(10)
self.line2.setZValue(10)
self.line1.setPen(get_pen('0.5'))
self.line2.setPen(get_pen('0.5'))
self.color = '0.8'
@property
def radius(self):
return self._radius
@radius.setter
def radius(self, value):
self._radius = value
self.node.setRect(-value, -value, 2 * value, 2 * value)
def contains(self, point):
# Check label
if self.label.contains(self.label.mapFromScene(point)):
return True
# Check node
if self.node.contains(self.node.mapFromScene(point)):
return True
return False
def update(self):
self.node.update()
def add_to_scene(self, scene):
scene.addItem(self.node)
scene.addItem(self.label)
scene.addItem(self.line1)
scene.addItem(self.line2)
def remove_from_scene(self, scene):
scene.removeItem(self.node)
scene.removeItem(self.label)
scene.removeItem(self.line1)
scene.removeItem(self.line2)
@property
def node_position(self):
pos = self.node.pos()
return pos.x(), pos.y()
@node_position.setter
def node_position(self, value):
self.node.setPos(value[0], value[1])
self.update_lines()
@property
def label_position(self):
pos = self.label.pos()
return pos.x(), pos.y()
@label_position.setter
def label_position(self, value):
self.label.setPos(value[0], value[1])
self.update_lines()
def update_lines(self):
x0, y0 = self.label_position
x2, y2 = self.node_position
x1 = 0.5 * (x0 + x2)
y1 = y0
self.line1.setLine(x0, y0, x1, y1)
self.line2.setLine(x1, y1, x2, y2)
@property
def color(self):
return qt_to_mpl_color(self.node.brush().color())
@color.setter
def color(self, value):
self.node.setBrush(mpl_to_qt_color(value))
class DataNode:
def __init__(self, data, radius=15):
self.data = data
# Add circular node
self.node = QGraphicsEllipseItem(0, 0, 1, 1)
# Set radius
self.radius = radius
# Add text label
self.label = QGraphicsTextItem(data.label)
font = self.label.font()
font.setPointSize(10)
self.label.setFont(font)
# Add line between label and node
self.line1 = QGraphicsLineItem(0, 0, 1, 1)
self.line2 = QGraphicsLineItem(0, 0, 1, 1)
self.node.setZValue(20)
self.label.setZValue(10)
self.line1.setZValue(10)
self.line2.setZValue(10)
self.line1.setPen(get_pen('0.5'))
self.line2.setPen(get_pen('0.5'))
self.color = '0.8'
@property
def radius(self):
return self._radius
@radius.setter
def radius(self, value):
self._radius = value
self.node.setRect(-value, -value, 2 * value, 2 * value)
def contains(self, point):
# Check label
if self.label.contains(self.label.mapFromScene(point)):
return True
# Check node
if self.node.contains(self.node.mapFromScene(point)):
return True
return False
def update(self):
self.node.update()
def add_to_scene(self, scene):
scene.addItem(self.node)
scene.addItem(self.label)
scene.addItem(self.line1)
scene.addItem(self.line2)
def remove_from_scene(self, scene):
scene.removeItem(self.node)
scene.removeItem(self.label)
scene.removeItem(self.line1)
scene.removeItem(self.line2)
@property
def node_position(self):
pos = self.node.pos()
return pos.x(), pos.y()
@node_position.setter
def node_position(self, value):
self.node.setPos(value[0], value[1])
self.update_lines()
@property
def label_position(self):
pos = self.label.pos()
return pos.x(), pos.y()
@label_position.setter
def label_position(self, value):
self.label.setPos(value[0], value[1])
self.update_lines()
def update_lines(self):
x0, y0 = self.label_position
x2, y2 = self.node_position
x1 = 0.5 * (x0 + x2)
y1 = y0
self.line1.setLine(x0, y0, x1, y1)
self.line2.setLine(x1, y1, x2, y2)
@property
def color(self):
return qt_to_mpl_color(self.node.brush().color())
@color.setter
def color(self, value):
self.node.setBrush(mpl_to_qt_color(value))