def gradient_darker(grad, factor):
"""Return a copy of the QGradient darkened by factor.
.. note:: Only QLinearGradeint and QRadialGradient are supported.
"""
if type(grad) is QGradient:
if grad.type() == QGradient.LinearGradient:
grad = sip.cast(grad, QLinearGradient)
elif grad.type() == QGradient.RadialGradient:
grad = sip.cast(grad, QRadialGradient)
if isinstance(grad, QLinearGradient):
new_grad = QLinearGradient(grad.start(), grad.finalStop())
elif isinstance(grad, QRadialGradient):
new_grad = QRadialGradient(grad.center(), grad.radius(),
grad.focalPoint())
else:
raise TypeError
new_grad.setCoordinateMode(grad.coordinateMode())
for pos, color in grad.stops():
new_grad.setColorAt(pos, color.darker(factor))
return new_grad
def gradient_darker(grad, factor):
"""Return a copy of the QGradient darkened by factor.
.. note:: Only QLinearGradeint and QRadialGradient are supported.
"""
if type(grad) is QGradient:
if grad.type() == QGradient.LinearGradient:
grad = sip.cast(grad, QLinearGradient)
elif grad.type() == QGradient.RadialGradient:
grad = sip.cast(grad, QRadialGradient)
if isinstance(grad, QLinearGradient):
new_grad = QLinearGradient(grad.start(), grad.finalStop())
elif isinstance(grad, QRadialGradient):
new_grad = QRadialGradient(grad.center(), grad.radius(),
grad.focalPoint())
else:
raise TypeError
new_grad.setCoordinateMode(grad.coordinateMode())
for pos, color in grad.stops():
new_grad.setColorAt(pos, color.darker(factor))
return new_grad
def create_gradient(base_color, stop=QPointF(0, 0),
finalStop=QPointF(0, 1)):
"""
Create a default linear gradient using `base_color` .
"""
grad = QLinearGradient(stop, finalStop)
grad.setStops([(0.0, base_color),
(0.5, base_color),
(0.8, base_color.darker(105)),
(1.0, base_color.darker(110)),
])
grad.setCoordinateMode(QLinearGradient.ObjectBoundingMode)
return grad
def update_items(self):
rect_cls = QGraphicsRectItem
nobrush = QBrush(Qt.NoBrush)
nopen = QPen(QColor('#FFFFFF'))
grad = Qt.NoBrush
self.item = rect_cls()
for codon in self.codons.keys():
rectitem = rect_cls(self.width, self.margin,
self.w, self.h, parent=self.item)
total_rea = len(self.aa_list[codon])
if total_rea > 0:
grad = QLinearGradient(QPointF(0, 0.5), QPointF(1, 0.5))
grad.setCoordinateMode(QLinearGradient.ObjectBoundingMode)
pointpos = 1.0 / total_rea
starting = -0.001
for reqcol, aa in enumerate(self.aa_list[codon]):
curcol = self.bgcolor[aa]
# use the same color twice to mark start and end
grad.setColorAt(starting + 0.001, curcol)
starting += pointpos
grad.setColorAt(starting, curcol)
# grad.setColorAt(starting, QColor(curcol))
# put small rec in big rec
# Comment award of the year !
brush = QBrush(QColor('#CCCCCC'))
pen = QPen(QColor('#BBBBBB'))
if self.codons[codon]:
brush = QBrush(grad)
pen = QPen(QColor('#000000'))
rectitem.setBrush(brush)
rectitem.setPen(pen)
# Center text according to rectitem size
text = QGraphicsSimpleTextItem(self.codons[codon], parent=rectitem)
text.setFont(self.font)
text.setBrush(self.fgcolor)
center = rectitem.boundingRect().center()
txtw = text.boundingRect().width()
txth = text.boundingRect().height()
text.setPos(center.x() - txtw / 2, center.y() - txth / 2)
self.width += self.w + self.margin
# now plot the big rect (with margin)
self.item.setPen(nopen)
self.item.setBrush(nobrush)
self.item.setRect(0, 0, self.width, self.h + (2 * self.margin))
def create_gradient(base_color, stop=QPointF(0, 0), finalStop=QPointF(0, 1)):
"""
Create a default linear gradient using `base_color` .
"""
grad = QLinearGradient(stop, finalStop)
grad.setStops([
(0.0, base_color),
(0.5, base_color),
(0.8, base_color.darker(105)),
(1.0, base_color.darker(110)),
])
grad.setCoordinateMode(QLinearGradient.ObjectBoundingMode)
return grad
def __init__(self, parent=None):
ChartView.__init__(self, parent)
self.dataSource = None
pen = QPen()
pen.setColor(QColor(20, 158, 11))
pen.setWidthF(self.LINE_WIDTH)
self.linePen = pen
gradient = QLinearGradient(0, 0, 0, 1)
gradient.setCoordinateMode(QLinearGradient.ObjectBoundingMode)
gradient.setColorAt(0, QColor(93, 188, 86)) # dark green
gradient.setColorAt(1, QColor(164, 216, 158)) # light green
self.graphBrush = QBrush(gradient)
gradient = QLinearGradient(0, 0, 0, 1)
gradient.setCoordinateMode(QLinearGradient.ObjectBoundingMode)
gradient.setColorAt(0, Qt.darkGray)
gradient.setColorAt(1, Qt.lightGray)
self.graphFutureBrush = QBrush(gradient)
def gradientFromColor(color):
gradient = QLinearGradient(0, 0, 0, 1)
gradient.setCoordinateMode(QLinearGradient.ObjectBoundingMode)
gradient.setColorAt(0, color)
gradient.setColorAt(1, color.lighter())
return gradient
series0 << QPointF(1, 5) << QPointF(3, 7) << QPointF(7, 6) << QPointF(9, 7) \
<< QPointF(12, 6) << QPointF(16, 7) << QPointF(18, 5)
series1 << QPointF(1, 3) << QPointF(3, 4) << QPointF(7, 3) << QPointF(8, 2) \
<< QPointF(12, 3) << QPointF(16, 4) << QPointF(18, 3)
series = QAreaSeries(series0, series1)
series.setName("Batman")
pen = QPen(0x059605)
pen.setWidth(3)
series.setPen(pen)
gradient = QLinearGradient(QPointF(0, 0), QPointF(0, 1))
gradient.setColorAt(0.0, QColor(0x3cc63c))
gradient.setColorAt(1.0, QColor(0x26f626))
gradient.setCoordinateMode(QGradient.ObjectBoundingMode)
series.setBrush(gradient)
chart = QChart()
chart.addSeries(series)
chart.setTitle("Simple areachart example")
chart.createDefaultAxes()
chart.axisX().setRange(0, 20)
chart.axisY().setRange(0, 10)
chartView = QChartView(chart)
chartView.setRenderHint(QPainter.Antialiasing)
window = QMainWindow()
window.setCentralWidget(chartView)
window.resize(400, 300)
