我正在尝试制作一些动画，但我遇到了问题。当我选中我的复选框时，我收到错误：
QWidget::repaint: Recursive repaint detected
那我怎么做动画呢？我想制作一个简单的动画：
def animation(self, paint):
for i in range(100):
paint.eraseRect(0, 0, 1000, 1000)
paint.drawPoint(i + 1, i + 1)
QtGui.QApplication.processEvents()
time.sleep(0.1)
self.update()
完整代码：
import sys, math, time
from PySide import QtGui , QtCore
class lab(QtGui.QWidget):
def __init__(self):
super(lab, self).__init__()
self.setFixedSize(900, 600)
self.scene = QtGui.QGraphicsScene(self)
self.scene.setSceneRect(0, 0, 600, 600)
self.view = QtGui.QGraphicsView()
self.view.setRenderHint(QtGui.QPainter.Antialiasing)
self.view.setScene(self.scene)
self.centerPoint_x_Lable = QtGui.QLabel("cX: ", self)
self.centerPoint_x_Lable.move(715, 24)
self.centerPoint_y_Lable = QtGui.QLabel("cY: ", self)
self.centerPoint_y_Lable.move(815, 24)
self.astroidRadius_Lable = QtGui.QLabel("R: ", self)
self.astroidRadius_Lable.move(715, 64)
self.rotationPoint_x_Lable = QtGui.QLabel("rX: ", self)
self.rotationPoint_x_Lable.move(715, 124)
self.rotationPoint_y_Lable = QtGui.QLabel("rY: ", self)
self.rotationPoint_y_Lable.move(815, 124)
self.rotationAngle_Lable = QtGui.QLabel("Ang: ", self)
self.rotationAngle_Lable.move(715, 164)
self.centerPoint_x = QtGui.QSpinBox(self)
self.centerPoint_x.setRange(0, 600)
self.centerPoint_x.setValue(300)
self.centerPoint_x.move(740, 20)
self.centerPoint_y = QtGui.QSpinBox(self)
self.centerPoint_y.setRange(0, 600)
self.centerPoint_y.setValue(300)
self.centerPoint_y.move(840, 20)
self.astroidRadius = QtGui.QSpinBox(self)
self.astroidRadius.setRange(20, 300)
self.astroidRadius.setValue(50)
self.astroidRadius.move(740, 60)
self.rotationPoint_x = QtGui.QSpinBox(self)
self.rotationPoint_x.setRange(0, 600)
self.rotationPoint_x.setValue(300)
self.rotationPoint_x.move(740, 120)
self.rotationPoint_y = QtGui.QSpinBox(self)
self.rotationPoint_y.setRange(0, 600)
self.rotationPoint_y.setValue(300)
self.rotationPoint_y.move(840, 120)
self.rotationAngle = QtGui.QSpinBox(self)
self.rotationAngle.setRange(0, 360)
self.rotationAngle.setValue(0)
self.rotationAngle.move(740, 160)
self.astroidSquare = QtGui.QLabel("S: ", self)
self.astroidSquare.move(715, 220)
self.cursorPos_x = QtGui.QLabel("X: ", self)
self.cursorPos_x.move(715, 260)
self.cursorPos_y = QtGui.QLabel("Y: ", self)
self.cursorPos_y.move(815, 260)
self.checkBox = QtGui.QCheckBox("Animation", self)
self.checkBox.move(715, 420)
self.x0 = self.centerPoint_x.value()
self.y0 = self.centerPoint_y.value()
self.aX = []
self.aY = []
self.r = self.astroidRadius.value()
self.xr0 = self.rotationPoint_x.value()
self.yr0 = self.rotationPoint_y.value()
self.ang = self.rotationAngle.value()
self.astriodXY()
self.RaX = self.rotateX(self.xr0, self.yr0, self.aX, self.aY, self.ang)
self.RaY = self.rotateY(self.xr0, self.yr0, self.aX, self.aY, self.ang)
self.astroidSquare.setText("S: %d" % (math.pi *3 / 8 * self.r ** 2))
self.connect(self.centerPoint_x, QtCore.SIGNAL("valueChanged(int)"), self.setFigure)
self.connect(self.centerPoint_y, QtCore.SIGNAL("valueChanged(int)"), self.setFigure)
self.connect(self.astroidRadius, QtCore.SIGNAL("valueChanged(int)"), self.changeSize)
self.connect(self.rotationPoint_x, QtCore.SIGNAL("valueChanged(int)"), self.rotationFigure)
self.connect(self.rotationPoint_y, QtCore.SIGNAL("valueChanged(int)"), self.rotationFigure)
self.connect(self.rotationAngle, QtCore.SIGNAL("valueChanged(int)"), self.rotationFigure)
def setFigure(self):
self.x0 = self.centerPoint_x.value()
self.y0 = self.centerPoint_y.value()
self.aX = []
self.aY = []
self.astriodXY()
self.RaX = self.rotateX(self.xr0, self.yr0, self.aX, self.aY, self.ang)
self.RaY = self.rotateY(self.xr0, self.yr0, self.aX, self.aY, self.ang)
self.update()
def changeSize(self):
self.r = self.astroidRadius.value()
self.aX = []
self.aY = []
self.astriodXY()
self.RaX = self.rotateX(self.xr0, self.yr0, self.aX, self.aY, self.ang)
self.RaY = self.rotateY(self.xr0, self.yr0, self.aX, self.aY, self.ang)
self.astroidSquare.setText("S: %d" % (math.pi *3 / 8 * self.r ** 2))
self.update()
def rotationFigure(self):
self.xr0 = self.rotationPoint_x.value()
self.yr0 = self.rotationPoint_y.value()
self.ang = self.rotationAngle.value()
self.aX = []
self.aY = []
self.astriodXY()
self.RaX = self.rotateX(self.xr0, self.yr0, self.aX, self.aY, self.ang)
self.RaY = self.rotateY(self.xr0, self.yr0, self.aX, self.aY, self.ang)
self.update()
def astriodXY(self):
for i in range(180):
self.aX.append(self.r*math.cos(2*i*math.pi/180)**3 + self.x0)
self.aY.append(self.r*math.sin(2*i*math.pi/180)**3 + self.y0)
def rotateX(self, x0, y0, listX, listY, ang):
return [(listX[i] - x0)*math.cos(ang*math.pi/180) - (listY[i] - y0)*math.sin(ang*math.pi/180) + x0 for i in range(len(listX))]
def rotateY(self, x0, y0, listX, listY, ang):
return [(listX[i] - x0)*math.sin(ang*math.pi/180) + (listY[i] - y0)*math.cos(ang*math.pi/180) + y0 for i in range(len(listX))]
def rotX(self, x0, y0, X, Y, ang):
return (X - x0)*math.cos(ang*math.pi/180) - (Y - y0)*math.sin(ang*math.pi/180) + x0
def rotY(self, x0, y0, X, Y, ang):
return (X - x0)*math.sin(ang*math.pi/180) + (Y - y0)*math.cos(ang*math.pi/180) + y0
def mouseMoveEvent(self, event):
if self.checkBox.isChecked() == False:
self.cursorPos_x.setText("X: %d" % event.x())
self.cursorPos_y.setText("Y: %d" % event.y())
self.update()
def paintEvent(self, e):
painter = QtGui.QPainter(self)
painter.setPen(QtGui.QPen(QtCore.Qt.red, 3))
if self.checkBox.isChecked() == False:
self.drawing(painter)
else:
self.animation(painter)
def drawing(self, paint):
for i in range(25):
if i > 0:
paint.setPen(QtGui.QPen(QtCore.Qt.red, 0.15))
paint.drawLine(i*25, 0, i*25, 600)
paint.drawLine(0, i*25, 600, i*25)
paint.setPen(QtGui.QPen(QtCore.Qt.black, 1))
for i in range(180):
if i < 179:
paint.drawLine(self.RaX[i], self.RaY[i], self.RaX[i+1], self.RaY[i+1])
else:
paint.drawLine(self.RaX[i], self.RaY[i], self.RaX[i-i], self.RaY[i-i])
x = QtGui.QCursor.pos().x() - 233
y = QtGui.QCursor.pos().y() - 96
for i in range(180):
if int(self.RaX[i]) == x and int(self.RaY[i]) == y:
if i < 179:
paint.setPen(QtGui.QPen(QtCore.Qt.blue, 1))
paint.drawLine(self.RaX[i] - 1000*(self.RaX[i] - self.RaX[i+1]), self.RaY[i] - 1000*(self.RaY[i] - self.RaY[i+1]), self.RaX[i] + 1000*(self.RaX[i] - self.RaX[i+1]), self.RaY[i] + 1000*(self.RaY[i] - self.RaY[i+1]))
paint.setPen(QtGui.QPen(QtCore.Qt.green, 1))
paint.drawLine(self.rotX(self.RaX[i], self.RaY[i], self.RaX[i] - 1000*(self.RaX[i] - self.RaX[i+1]), self.RaY[i] - 1000*(self.RaY[i] - self.RaY[i+1]), 90), self.rotY(self.RaX[i], self.RaY[i], self.RaX[i] - 1000*(self.RaX[i] - self.RaX[i+1]), self.RaY[i] - 1000*(self.RaY[i] - self.RaY[i+1]), 90), self.RaX[i], self.RaY[i])
elif i == 179:
paint.drawLine(self.RaX[i] - 1000*(self.RaX[i] - self.RaX[i-i]), self.RaY[i] - 1000*(self.RaY[i] - self.RaY[i-i]), self.RaX[i] + 1000*(self.RaX[i] - self.RaX[i-i]), self.RaY[i] + 1000*(self.RaY[i] - self.RaY[i-i]))
paint.drawLine(self.rotX(self.RaX[i], self.RaY[i], self.RaX[i] - 1000*(self.RaX[i] - self.RaX[i-i]), self.RaY[i] - 1000*(self.RaY[i] - self.RaY[i-i]), 90), self.rotY(self.RaX[i], self.RaY[i], self.RaX[i] - 1000*(self.RaX[i] - self.RaX[i-i]), self.RaY[i] - 1000*(self.RaY[i] - self.RaY[i-i]), 90), self.RaX[i], self.RaY[i])
def animation(self, paint):
for i in range(100):
paint.eraseRect(0, 0, 1000, 1000)
paint.drawPoint(i + 1, i + 1)
QtGui.QApplication.processEvents()
time.sleep(0.1)
self.update()
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
form = lab()
form.setWindowTitle("Animation")
form.show()
app.exec_()
答案 0 :(得分：1)
您正在从paintEvent调用的函数中调用update。
update将再次调用paintEvent，导致递归。