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Panel.py
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from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from math import *
import sys
class GaugePanel(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("GaugePanel")
self.setMinimumWidth(300)
self.setMinimumHeight(300)
self.timer = QTimer() # 窗口重绘定时器
self.timer.timeout.connect(self.update)
self.timer.start(100)
self.testTimer = QTimer()
self.testTimer.timeout.connect(self.testTimer_timeout_handle)
self.lcdDisplay = QLCDNumber(self)
self.lcdDisplay.setDigitCount(4)
self.lcdDisplay.setMode(QLCDNumber.Dec)
self.lcdDisplay.setSegmentStyle(QLCDNumber.Flat)
# self.lcdDisplay.setStyleSheet('border:2px solid white;color:white;background:silver;font-family:黑体;')
# lyc change the better color for the lcd
self.lcdDisplay.setStyleSheet('border: 2px solid silver;'
'color: white;'
'background: blue;'
'font-family: 黑体;')
self._startAngle = 120 # 以QPainter坐标方向为准,建议画个草图看看
self._endAngle = 60 # 以以QPainter坐标方向为准
self._scaleMainNum = 10 # 主刻度数
self._scaleSubNum = 10 # 主刻度被分割份数
self._minValue = 0
self._maxValue = 500
self._title = 'km/h'
self._value = 0
self._minRadio = 1 # 缩小比例,用于计算刻度数字
self._decimals = 2 # 小数位数
@pyqtSlot()
def testTimer_timeout_handle(self):
pass
# self._value = self._value + 1
# if self._value > self._maxValue:
# self._value = self._minValue
def setTestTimer(self, flag):
if flag is True:
self.testTimer.start(10)
else:
self.testTimer.stop()
def setMinMaxValue(self, min, max):
self._minValue = min
self._maxValue = max
def setTitle(self, title):
self._title = title
def setValue(self, value):
self._value = value
def setMinRadio(self, minRadio):
self._minRadio = minRadio
def setDecimals(self, decimals):
self._decimals = 2
def paintEvent(self, event):
side = min(self.width(), self.height())
painter = QPainter(self)
painter.setRenderHint(QPainter.Antialiasing)
painter.translate(self.width() / 2, self.height() / 2) # painter坐标系原点移至widget中央
painter.scale(side / 200, side / 200) # 缩放painterwidget坐标系，使绘制的时钟位于widget中央,即钟表支持缩放
self.drawPanel(painter) # 画外框表盘
self.drawScaleNum(painter) # 画刻度数字
self.drawScaleLine(painter) # 画刻度线
self.drawTitle(painter) # 画标题备注
self.drawValue(painter) # 画数显
self.drawIndicator(painter) # 画指针
def drawPanel(self, p):
p.save()
radius = 100
lg = QLinearGradient(-radius, -radius, radius, radius)
lg.setColorAt(0, Qt.white)
lg.setColorAt(1, Qt.white)
p.setBrush(lg)
p.setPen(Qt.NoPen)
p.drawEllipse(-radius, -radius, radius * 2, radius * 2)
p.setBrush(Qt.black)
p.drawEllipse(-97, -97, 97 * 2, 97 * 2)
p.restore()
def drawScaleNum(self, p):
p.save()
p.setPen(Qt.white)
startRad = self._startAngle * (3.14 / 180)
stepRad = (360 - (self._startAngle - self._endAngle)) * (3.14 / 180) / self._scaleMainNum
fm = QFontMetricsF(p.font())
for i in range(0, self._scaleMainNum + 1):
sina = sin(startRad + i * stepRad)
cosa = cos(startRad + i * stepRad)
tmpVal = i * ((self._maxValue - self._minValue) / self._scaleMainNum) + self._minValue
tmpVal = tmpVal / self._minRadio
s = '{:.0f}'.format(tmpVal)
w = fm.size(Qt.TextSingleLine, s).width()
h = fm.size(Qt.TextSingleLine, s).height()
x = 85 * cosa - w / 2
y = 85 * sina - h / 2
p.drawText(QRectF(x, y, w, h), s)
p.restore()
def drawScaleLine(self, p):
p.save()
p.rotate(self._startAngle)
scaleNums = self._scaleMainNum * self._scaleSubNum
angleStep = (360 - (self._startAngle - self._endAngle)) / scaleNums
p.setPen(Qt.white)
pen = QPen(Qt.white)
for i in range(0, scaleNums + 1):
if i >= 0.8 * scaleNums:
pen.setColor(Qt.red)
if i % self._scaleMainNum == 0:
pen.setWidth(2)
p.setPen(pen)
p.drawLine(64, 0, 72, 0)
else:
pen.setWidth(1)
p.setPen(pen)
p.drawLine(67, 0, 72, 0)
p.rotate(angleStep)
p.restore()
def drawTitle(self, p):
p.save()
p.setPen(Qt.white)
fm = QFontMetrics(p.font())
w = fm.size(Qt.TextSingleLine, self._title).width()
p.drawText(int(-w / 2), -45, self._title)
p.restore()
def drawValue(self, p):
side = min(self.width(), self.height())
w, h = side / 2 * 0.4, side / 2 * 0.2
x, y = self.width() / 2 - w / 2, self.height() / 2 + side / 2 * 0.55
self.lcdDisplay.setGeometry(int(x), int(y), int(w), int(h))
ss = '{:.' + str(self._decimals) + 'f}'
self.lcdDisplay.display(ss.format(self._value))
def drawIndicator(self, p):
p.save()
polygon = QPolygon([QPoint(0, -2), QPoint(0, 2), QPoint(60, 0)])
degRotate = self._startAngle + (360 - (self._startAngle - self._endAngle)) / (
self._maxValue - self._minValue) * (self._value - self._minValue)
# 画指针
p.rotate(degRotate)
halogd = QRadialGradient(0, 0, 60, 0, 0)
halogd.setColorAt(0, Qt.white)
halogd.setColorAt(1, Qt.white)
p.setPen(Qt.white)
p.setBrush(halogd)
p.drawConvexPolygon(polygon)
p.restore()
# 画中心点
p.save()
radGradient = QRadialGradient(0, 0, 10)
radGradient = QConicalGradient(0, 0, -90)
radGradient.setColorAt(0.0, Qt.darkGray)
radGradient.setColorAt(0.5, Qt.white)
radGradient.setColorAt(1.0, Qt.darkGray)
p.setPen(Qt.NoPen)
p.setBrush(radGradient)
p.drawEllipse(-5, -5, 10, 10)
p.restore()
def set_speed(self, v):
self.lcdDisplay.display(v)
def set_panel_value(self, v):
self._value = v
if __name__ == "__main__":
app = QApplication(sys.argv)
gp = GaugePanel()
gp.show()
gp.setTestTimer(True)
gp.set_panel_value(100)
app.exec_()