def paintEvent(self, QPaintEvent):
p = QPainter(self)
r = self.rect()
p.setPen(self.pen)
if (self.sd.style == QGradient.LinearGradient):
linearGradient = QLinearGradient(self.startPoint, self.endPoint)
linearGradient.setColorAt(0.0, self.sd.startColor)
linearGradient.setColorAt(1.0, self.sd.endColor)
linearGradient.setSpread(self.sd.spread)
p.setBrush(linearGradient)
elif (self.sd.style == QGradient.RadialGradient):
rr = math.sqrt(
math.pow(self.endPoint.x() - self.startPoint.x(), 2) + math.pow(self.endPoint.y() - self.startPoint.y(),
2))
radialGradient = QRadialGradient(self.startPoint, rr, self.startPoint)
radialGradient.setColorAt(0.0, self.sd.startColor)
radialGradient.setColorAt(1.0, self.sd.endColor)
radialGradient.setSpread(self.sd.spread)
p.setBrush(radialGradient)
elif (self.sd.style == QGradient.ConicalGradient):
angle = math.atan2(self.endPoint.y() - self.startPoint.y(), self.endPoint.x() - self.startPoint.x())
conicalGradient = QConicalGradient(self.startPoint, -(180 * angle) / math.pi)
conicalGradient.setColorAt(0.0, self.sd.startColor)
conicalGradient.setColorAt(1.0, self.sd.endColor)
p.setBrush(conicalGradient)
p.drawRect(r)
def draw_value(self, painter):
self.initCoordinateSystem(painter)
color = QColor(Qt.blue)
if self.mPointer.value() >= self.mPointer.nominal():
color = QColor(0, 200, 0)
if self.mPointer.value() >= self.mPointer.critical():
color = QColor(Qt.red)
factor = (self.mPointer.value() - self.mPointer.minimal()) / (
self.mPointer.maximal() - self.mPointer.minimal())
painter.setFont(self.mValueFont)
st = "{} ℃".format(self.mPointer.value())
Size = painter.fontMetrics().size(Qt.TextSingleLine, st)
painter.drawText(QPointF(Size.width() / -2, 307 - Size.height()), st)
slug = QLinearGradient(0.0, 0.0, 5.0, 0.0)
tank = QRadialGradient(0.0, 267.0, 10.0, -5.0, 262.0)
slug.setSpread(QGradient.ReflectSpread)
tank.setSpread(QGradient.ReflectSpread)
color.setHsv(color.hue(), color.saturation(), color.value())
slug.setColorAt(1.0, color)
tank.setColorAt(1.0, color)
color.setHsv(color.hue(), color.saturation() - 200, color.value())
slug.setColorAt(0.0, color)
tank.setColorAt(0.0, color)
painter.setPen(Qt.NoPen)
painter.setBrush(slug)
offset = 10
temp = 224 * factor
height = temp + offset
if 231 < temp:
height = 231 + offset
if offset - 5 >= height:
height = offset - 5
painter.drawRect(-5, 252 + offset - height, 10, height)
painter.setBrush(tank)
painter.drawEllipse(QRectF(-10.0, 257.5, 20.0, 20.0))
painter.end()
def paintEvent(self, event):
painter = QPainter(self)
pen = QPen()
pen.setStyle(Qt.NoPen)
painter.setPen(pen)
W = self.width()
H = self.height()
radialGrad = QRadialGradient(W / 2, H / 2, W / 8, W / 2, H / 2)
radialGrad.setColorAt(0, Qt.yellow)
radialGrad.setColorAt(1, Qt.blue)
radialGrad.setSpread(QGradient.ReflectSpread)
painter.setBrush(radialGrad)
painter.drawRect(self.rect())
def __draw03_gradient(self): #在窗口上绘图
painter = QPainter(self)
## painter.setRenderHint(QPainter.Antialiasing)
## painter.setRenderHint(QPainter.TextAntialiasing)
#设置画笔
pen = QPen()
## pen.setWidth(2) #线宽
## pen.setColor(Qt.red) #划线颜色
pen.setStyle(Qt.NoPen) #线的类型，实线、虚线等
painter.setPen(pen)
W = self.width() #绘图区宽度
H = self.height() #绘图区高度
## radialGrad=QRadialGradient(W/4,H/2,W/10,W/5,H/2)
## radialGrad=QRadialGradient(W/2,H/2,W/2,3*W/4,H/2) #原点就是焦点
radialGrad = QRadialGradient(W / 2, H / 2, W / 8, W / 2, H / 2)
radialGrad.setColorAt(0, Qt.yellow) #yellow
radialGrad.setColorAt(1, Qt.blue) #green
## PadSpread, RepeatSpread, ReflectSpread
radialGrad.setSpread(QGradient.ReflectSpread)
painter.setBrush(radialGrad)
## rect=QRect(W/4,H/4,W/2,H/2)
#### linearGrad=QLinearGradient(rect.left(), rect.top(), rect.right(), rect.top())#从左到右
## linearGrad=QLinearGradient(rect.left(), rect.top(), rect.right(), rect.bottom())#从左到右
##
## linearGrad.setColorAt(0,Qt.blue) #起点颜色
## linearGrad.setColorAt(0.5,Qt.white) #中间点颜色
## linearGrad.setColorAt(1,Qt.blue) #终点颜色
## ## linearGrad.setSpread(QGradient.ReflectSpread) #展布模式
## painter.setBrush(linearGrad)
## coniGrad=QConicalGradient(W/2, H/2, 0)
## coniGrad.setColorAt(0, Qt.yellow)
## coniGrad.setColorAt(0.5, Qt.blue)
## coniGrad.setColorAt(1, Qt.green) #green
## painter.setBrush(coniGrad)
painter.drawRect(self.rect()) #填充整个窗口
def drawTemperature(self, painter):
if self.value >= self.critical:
color = QColor(255, 0, 0)
elif self.value >= self.normal:
color = QColor(0, 200, 0)
else:
color = QColor(0, 0, 255)
scale = QLinearGradient(0, 0, 5, 0)
bulb = QRadialGradient(0, 267.0, 10, -5, 262)
scale.setSpread(QGradient.ReflectSpread)
bulb.setSpread(QGradient.ReflectSpread)
color.setHsv(color.hue(), color.saturation(), color.value())
scale.setColorAt(1, color)
bulb.setColorAt(1, color)
color.setHsv(color.hue(), color.saturation() - 200, color.value())
scale.setColorAt(0, color)
bulb.setColorAt(0, color)
factor = self.value - self.m_min
factor = (factor / self.m_max) - self.m_min
temp = SCALE_HEIGHT * factor
height = temp + OFFSET
painter.setPen(Qt.NoPen)
painter.setBrush(scale)
painter.drawRect(-5, 252 + OFFSET - height, 10, height)
painter.setBrush(bulb)
rect = QRectF(-10, 258, 20, 20)
painter.drawEllipse(rect)