我在QT设计器中创建了一个QMainWindow,其中包含一个GraphicsView对象,该对象已升级为pyQTGraph PlotWidget。我想使用一个QTimer事件来获取实时串行数据(Y),并将其绘制为(X)由QTimer活动设置的1秒增量。然而,我遇到的问题是,当使用QT的QMainWindow作为主窗体时,我得到错误“QObject::startTimer:QTimer只能用于以QThread开始的线程”,但是如果我使用QT中的QWidget作为主窗体,一切都可以正常工作,没有错误。
如何将QTimer与QT的QMainWindow一起使用
QT4和QT设计器
PyQT图
以下是表格代码:
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'MainPlotWindow.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(735, 374)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.plot = PlotWidget(self.centralwidget)
self.plot.setGeometry(QtCore.QRect(30, 40, 681, 261))
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.plot.sizePolicy().hasHeightForWidth())
self.plot.setSizePolicy(sizePolicy)
self.plot.setFrameShape(QtGui.QFrame.WinPanel)
self.plot.setFrameShadow(QtGui.QFrame.Sunken)
self.plot.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.plot.setObjectName(_fromUtf8("plot"))
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtGui.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 735, 21))
self.menubar.setObjectName(_fromUtf8("menubar"))
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtGui.QStatusBar(MainWindow)
self.statusbar.setObjectName(_fromUtf8("statusbar"))
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
from pyqtgraph import PlotWidget
from PyQt4.QtCore import QThread, SIGNAL, QSettings
import sys
from pyqtgraph.Qt import QtGui, QtCore
import numpy as np
import pyqtgraph as pg
from MainPlotWindow import *
'''=====================================================================
M A I N G U I
====================================================================='''
class MyForm(QtGui.QMainWindow):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
def PlotUpdate():
print("Hello")
timer = QtCore.QTimer()
timer.timeout.connect(PlotUpdate)
timer.start(1000) # 1 Second Refesh Rate
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
myapp = MyForm()
myapp.show()
sys.exit(app.exec_())
