Python pyqt4从其他py文件绘制圆弧

尝试绘制圆弧，问题是我想用另一个py文件来标定draw函数，但到目前为止运气不好（若主py文件中的draw函数是可以的）。我导入了另一个py文件，但什么也没发生。代码如下： main.py

和另一个文件.py

from PyQt4 import QtGui, QtCore, Qt
from PyQt4.Qt import QPen

class cPrg(QtGui.QWidget):

def __init__(self):

    super(cPrg, self).__init__()

    self.startA = 0
    self.endA = 0
    self.textas = 'bandom'

def paintEvent(self, e):
    painter = QtGui.QPainter(self)
    painter.setRenderHint(painter.Antialiasing)
    rect = e.rect

    r = QtCore.QRect(200,200,20,20)                            #<-- create rectangle
    size = r.size()                                            #<-- get rectangle size
    r.setSize(size*10)                                         #<-- set size
    startAngle = self.startA*16                                #<-- set start angle to draw arc
    endAngle = self.endA*16                                    #<-- set end arc angle

    painter.setPen(QPen(QtGui.QColor('#000000')))              #<-- arc color
    #painter.setBrush(QtCore.Qt.HorPattern)
    painter.drawArc(r, startAngle, endAngle)                   #<-- draw arc


    painter.end()
    super(cPrg,self).paintEvent(e)

从PyQt4导入QtGui、QtCore、Qt
从PyQt4.Qt导入QPen
类cPrg（QtGui.QWidget）：
定义初始化（自）：
超级（cPrg，self）。\uuuuu init\uuuuuu（）
self.startA=0
self.endA=0
self.textas='bandom'
def喷漆事件（自身，e）：
painter=QtGui.QPainter（自）
painter.setRenderHint（painter.Antialiasing）
rect=e.rect
r=QtCore.QRect（200200,20,20）#使用
QPen（颜色，线宽）
，
update（）
使用paintEvent重新绘制更改线宽

试试这个：

from PyQt4 import QtGui, QtCore


class cPrg:
    def __init__(self):
        self.linewidth = 0

    def setLineWidth(self, linewidth):
        self.linewidth = linewidth

    def drawArc(self, painter):
        painter.setRenderHint(painter.Antialiasing)
        r = QtCore.QRect(200,200,20,20)                            #<-- create rectangle
        size = r.size()                                            #<-- get rectangle size
        r.setSize(size*10)                                         #<-- set size
        startAngle = self.startA*16                                #<-- set start angle to draw arc
        endAngle = self.endA*16                                    #<-- set end arc angle
        painter.setPen(QtGui.QPen(QtGui.QColor('#000000'), self.linewidth))              #<-- arc color
        painter.drawArc(r, startAngle, endAngle)                   #<-- draw arc


class mainWindow(QtGui.QWidget):
    def __init__(self):
        super(mainWindow, self).__init__()
        self.otherFile = cPrg()
        self.initUI()
        self.i = 0

    def initUI(self):
        self.label = QtGui.QLabel(self)
        self.label.setText(self.otherFile.textas)
        self.label.setGeometry(100,140, 60, 40)
        self.otherFile.startA = 270
        self.otherFile.endA = -270
        self.setGeometry(100, 100, 800, 480)
        self.setWindowTitle('Window Title')
        timer = QtCore.QTimer(self)
        timer.timeout.connect(self.changeLineWidth)
        timer.start(1000)

    def changeLineWidth(self):
        self.otherFile.setLineWidth(self.i)
        self.i += 1
        self.i %= 60
        self.update()

    def paintEvent(self, e):
        painter = QtGui.QPainter(self)
        self.otherFile.drawArc(painter)


if __name__ == '__main__':
    import sys

    app = QtGui.QApplication(sys.argv)
    w = mainWindow()
    w.show()
    sys.exit(app.exec_())


您希望得到什么？您的逻辑非常错误。@eyllanesc我想在cPrg.py文件和main.py文件中绘制图形，只需简单调用cPrg并设置几何体的大小。@eyllanesc以及为什么逻辑错误？我有一个例子——在单独的文件中有一个循环的进度条，我在主文件中调用这个进度条，它正在工作（paintEvent在进度条py文件中）。我知道我对python和pyqt也是新手，所以我想知道更多关于这种情况下错误逻辑的信息。谢谢你放你想要的东西总是好的。用这个更新你的帖子request@eyllanesc刚刚更新了我的帖子。谢谢你的回答。这是可行的，但可能会在cPrg.py文件和main.py文件中生成类似于此的al绘图。只需调用cPrg而不重新绘制？谢谢！当我开始寻找循环进度条时，您在哪里？：）现在我想学习自己动手，我的弧看起来（和动作）就像进度条不能通过设置几何体来确定大小。无论如何，谢谢你！顺便问一下，你能告诉我为什么我可以用setGeometry设置进度条的大小吗？所有小部件都是从QWidget继承的
from PyQt4 import QtGui, Qt, QtCore
import sys
from src.cprg import cPrg
from src.cprogress import GaugeWidget
from PyQt4.Qt import QPen

class mainWindow(QtGui.QWidget):

def __init__(self):

    self.otherFile = cPrg()
    self.gauge = GaugeWidget()

    self.i = 0
    self.lineWidth = 3
    self._value = 0
    self.completed = 0

    super(mainWindow, self).__init__()

    self.initUI()

def initUI(self):

    self.setValue(.5)

    #self.showFullScreen()
    self.setGeometry(100, 100, 800, 480)
    self.setWindowTitle('Window Title')

    self.show()

def close_app(self):
    sys.exit()

def setValue(self, val):
    val = float(min(max(val, 0), 1))
    self._value = -270 * val
    self.update()

def setLineWidth(self, lineWidth):
    self.lineWidth = lineWidth

def paintEvent(self, e):

    painter = QtGui.QPainter(self)
    painter.setRenderHint(painter.Antialiasing)
    rect = e.rect

    outerRadius = min(self.width(),self.height())
    #arc line
    r = QtCore.QRect(20,20,outerRadius-10,outerRadius-10)                            #<-- create rectangle
    size = r.size()                                            #<-- get rectangle size
    r.setSize(size*.4)                                         #<-- set size
    startAngle = 270*16                                #<-- set start angle to draw arc
    endAngle = -270*16                                    #<-- set end arc angle

    painter.setPen(QPen(QtGui.QColor('#000000'), self.lineWidth))              #<-- arc color
    #painter.setBrush(QtCore.Qt.HorPattern)
    painter.drawArc(r, startAngle, endAngle)                   #<-- draw arc

    #arc prg
    painter.save()
    painter.setPen(QPen(QtGui.QColor('#ffffff'), 20))
    painter.drawArc(r, startAngle, self._value*16)
    painter.restore()

    painter.end()
    super(mainWindow,self).paintEvent(e)

def main():
app = QtGui.QApplication(sys.argv)
gui = mainWindow()
sys.exit(app.exec_())

if __name__ == '__main__':
main()   

from PyQt4 import QtGui, Qt, QtCore
import sys
from src.cprg import cPrg              #<import progressbar
from src.cprogress import GaugeWidget
from PyQt4.Qt import QPen

class mainWindow(QtGui.QWidget):

def __init__(self):

    self.otherFile = cPrg()           #< imported progress bar
    self.gauge = GaugeWidget()

    self.i = 0
    self.lineWidth = 3
    self._value = 0
    self.completed = 0

    super(mainWindow, self).__init__()

    self.initUI()

def initUI(self):

    self.otherFile.setGeometry(10,10,100,100)   #<<<< progress bar size
    self.otherFile.setValue(0.5)                #< progress bar value 

from PyQt4 import QtGui, QtCore


class cPrg:
    def __init__(self):
        self.linewidth = 0

    def setLineWidth(self, linewidth):
        self.linewidth = linewidth

    def drawArc(self, painter):
        painter.setRenderHint(painter.Antialiasing)
        r = QtCore.QRect(200,200,20,20)                            #<-- create rectangle
        size = r.size()                                            #<-- get rectangle size
        r.setSize(size*10)                                         #<-- set size
        startAngle = self.startA*16                                #<-- set start angle to draw arc
        endAngle = self.endA*16                                    #<-- set end arc angle
        painter.setPen(QtGui.QPen(QtGui.QColor('#000000'), self.linewidth))              #<-- arc color
        painter.drawArc(r, startAngle, endAngle)                   #<-- draw arc


class mainWindow(QtGui.QWidget):
    def __init__(self):
        super(mainWindow, self).__init__()
        self.otherFile = cPrg()
        self.initUI()
        self.i = 0

    def initUI(self):
        self.label = QtGui.QLabel(self)
        self.label.setText(self.otherFile.textas)
        self.label.setGeometry(100,140, 60, 40)
        self.otherFile.startA = 270
        self.otherFile.endA = -270
        self.setGeometry(100, 100, 800, 480)
        self.setWindowTitle('Window Title')
        timer = QtCore.QTimer(self)
        timer.timeout.connect(self.changeLineWidth)
        timer.start(1000)

    def changeLineWidth(self):
        self.otherFile.setLineWidth(self.i)
        self.i += 1
        self.i %= 60
        self.update()

    def paintEvent(self, e):
        painter = QtGui.QPainter(self)
        self.otherFile.drawArc(painter)


if __name__ == '__main__':
    import sys

    app = QtGui.QApplication(sys.argv)
    w = mainWindow()
    w.show()
    sys.exit(app.exec_())

from math import ceil

from PyQt4 import QtGui, Qt, QtCore
import sys


class cPrg(QtGui.QProgressBar):

    def __init__(self, parent=None):
        super(cPrg, self).__init__(parent)
        self.linewidth = 1

    def factor(self, value):
        a = 360 / (self.maximum() - self.minimum())
        b = -a / (self.maximum() - self.minimum())
        return a*value + b

    def setLineWidth(self, linewidth):
        self.linewidth = linewidth
        self.update()

    def paintEvent(self, event):

        painter = QtGui.QPainter(self)
        painter.setRenderHint(painter.Antialiasing)
        r = self.rect()
        val = ceil(self.factor(self.value()))
        nr = QtCore.QRect(r.topLeft() + QtCore.QPoint(self.linewidth, self.linewidth),
                   QtCore.QSize(r.width()-2*self.linewidth, r.height()-2*self.linewidth))
        painter.setPen(QtGui.QPen(QtGui.QColor('#000000'), self.linewidth))
        painter.drawArc(nr, 0*16, val*16)


class mainWindow(QtGui.QWidget):
    def __init__(self):
        super(mainWindow, self).__init__()
        self.otherFile = cPrg(self)
        self.otherFile.setMinimum(0)
        self.otherFile.setMaximum(360)
        self.otherFile.setValue(90)
        self.initUI()

        timerLW = QtCore.QTimer(self)
        timerLW.timeout.connect(self.changeLW)
        timerLW.start(100)

        timerVal = QtCore.QTimer(self)
        timerVal.timeout.connect(self.updateValue)
        timerVal.start(100)

    def initUI(self):
        self.label = QtGui.QLabel(self)
        self.label.setText("test")
        self.label.setGeometry(200, 200, 60, 40)

        self.otherFile.setGeometry(0, 0, 200, 200)
        self.setGeometry(0, 0, 800, 480)
        self.setWindowTitle('Window Title')

    def changeLW(self):
        lw = (self.otherFile.linewidth + 1) % 20
        self.otherFile.setLineWidth(lw)

    def updateValue(self):
        self.otherFile.setValue(self.otherFile.value() + 1)


def main():
    app = QtGui.QApplication(sys.argv)
    gui = mainWindow()
    gui.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
   main()