又是好久之前寫的代碼了，不寫下來真的會忘光光的啊，罪過罪過
這個主要是因爲有三個文件，剛開始想實現在pyqt下面嵌入matplotlib的窗口，有點費力啊，查了好多前輩的代碼
簡單來說三個文件，第一個，定義程序界面，第二個，定義插入的matplotlib的功能，也就是要顯示什麼東西
第三個，就是把兩個連接起來，也就是pyqt特有的信號-槽，把按鍵發射的信號跟你要實現的功能連接
其中主要注意到繼承關係，還有就是matplotlib在pyqt裏面插入的話因爲pyqt本身是沒有插入這種窗口的選項的，所以是升級(？)窗口實現的
主要跟我以前寫過代碼的不同之處在於各個代碼之間的關係分明，有繼承，還有信號-槽。
Code_MplMainWindow.py：
from PyQt4 import QtGui, QtCore
from Ui_MplMainWindow import Ui_MainWindow
class Code_MainWindow(Ui_MainWindow):
def __init__(self, parent = None):
super(Code_MainWindow, self).__init__(parent)
self.setupUi(self)
self.btnStart.clicked.connect(self.startPlot)
self.btnPause.clicked.connect(self.pausePlot)
def startPlot(self):
''' begin to plot'''
self.mplCanvas.startPlot()
pass
def pausePlot(self):
''' pause plot '''
self.mplCanvas.pausePlot()
pass
def releasePlot(self):
''' stop and release thread'''
self.mplCanvas.releasePlot()
def closeEvent(self,event):
result = QtGui.QMessageBox.question(self,
"Confirm Exit...",
"Are you sure you want to exit ?",
QtGui.QMessageBox.Yes| QtGui.QMessageBox.No)
event.ignore()
if result == QtGui.QMessageBox.Yes:
self.releasePlot()#release thread's resouce
event.accept()
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
ui = Code_MainWindow()
ui.show()
sys.exit(app.exec_())Ui_MplMainWindow.py：
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'MplMainWindow.ui'
#
# Created: Mon Aug 11 14:18:31 2014
# by: PyQt4 UI code generator 4.10.3
#
# WARNING! All changes made in this file will be lost!
from PyQt4 import QtCore, QtGui
from mplCanvasWrapper import MplCanvasWrapper
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)
#inheritent from QtGui.QMainWindow
class Ui_MainWindow(QtGui.QMainWindow):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(690, 427)
self.centralWidget = QtGui.QWidget(MainWindow)
self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
self.gridLayout = QtGui.QGridLayout(self.centralWidget)
self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
self.horizontalLayout = QtGui.QHBoxLayout()
self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
self.btnStart = QtGui.QPushButton(self.centralWidget)
self.btnStart.setObjectName(_fromUtf8("btnStart"))
self.horizontalLayout.addWidget(self.btnStart)
self.btnPause = QtGui.QPushButton(self.centralWidget)
self.btnPause.setObjectName(_fromUtf8("btnPause"))
self.horizontalLayout.addWidget(self.btnPause)
spacerItem = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum)
self.horizontalLayout.addItem(spacerItem)
self.gridLayout.addLayout(self.horizontalLayout, 0, 0, 1, 1)
self.mplCanvas = MplCanvasWrapper(self.centralWidget)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.mplCanvas.sizePolicy().hasHeightForWidth())
self.mplCanvas.setSizePolicy(sizePolicy)
self.mplCanvas.setObjectName(_fromUtf8("mplCanvas"))
self.gridLayout.addWidget(self.mplCanvas, 1, 0, 1, 1)
MainWindow.setCentralWidget(self.centralWidget)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.btnStart.setText(_translate("MainWindow", "開始", None))
self.btnPause.setText(_translate("MainWindow", "暫停", None))
mplCanvasWrapper.py：
from PyQt4 import QtGui
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar
from matplotlib.figure import Figure
import numpy as np
from array import array
import time
import random
import threading
from datetime import datetime
from matplotlib.dates import date2num, MinuteLocator, SecondLocator, DateFormatter
X_MINUTES = 1
Y_MAX = 100
Y_MIN = 1
INTERVAL = 1
MAXCOUNTER = int(X_MINUTES * 60/ INTERVAL)
class MplCanvas(FigureCanvas):
def __init__(self):
self.fig = Figure()
self.ax = self.fig.add_subplot(111)
FigureCanvas.__init__(self, self.fig)
FigureCanvas.setSizePolicy(self, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
FigureCanvas.updateGeometry(self)
self.ax.set_xlabel("time of data generator")
self.ax.set_ylabel('random data value')
self.ax.legend()
self.ax.set_ylim(Y_MIN,Y_MAX)
self.ax.xaxis.set_major_locator(MinuteLocator()) # every minute is a major locator
self.ax.xaxis.set_minor_locator(SecondLocator([10,20,30,40,50])) # every 10 second is a minor locator
self.ax.xaxis.set_major_formatter( DateFormatter('%H:%M:%S') ) #tick label formatter
self.curveObj = None # draw object
def plot(self, datax, datay):
if self.curveObj is None:
#create draw object once
self.curveObj, = self.ax.plot_date(np.array(datax), np.array(datay),'bo-')
else:
#update data of draw object
self.curveObj.set_data(np.array(datax), np.array(datay))
#update limit of X axis,to make sure it can move
self.ax.set_xlim(datax[0],datax[-1])
ticklabels = self.ax.xaxis.get_ticklabels()
for tick in ticklabels:
tick.set_rotation(25)
self.draw()
class MplCanvasWrapper(QtGui.QWidget):
def __init__(self , parent =None):
QtGui.QWidget.__init__(self, parent)
self.canvas = MplCanvas()
self.vbl = QtGui.QVBoxLayout()
self.ntb = NavigationToolbar(self.canvas, parent)
self.vbl.addWidget(self.ntb)
self.vbl.addWidget(self.canvas)
self.setLayout(self.vbl)
self.dataX= []
self.dataY= []
self.initDataGenerator()
def startPlot(self):
self.__generating = True
def pausePlot(self):
self.__generating = False
pass
def initDataGenerator(self):
self.__generating=False
self.__exit = False
self.tData = threading.Thread(name = "dataGenerator",target = self.generateData)
self.tData.start()
def releasePlot(self):
self.__exit = True
self.tData.join()
def generateData(self):
counter=0
while(True):
if self.__exit:
break
if self.__generating:
newData = random.randint(Y_MIN, Y_MAX)
newTime= date2num(datetime.now())
self.dataX.append(newTime)
self.dataY.append(newData)
self.canvas.plot(self.dataX, self.dataY)
if counter >= MAXCOUNTER:
self.dataX.pop(0)
self.dataY.pop(0)
else:
counter+=1
time.sleep(INTERVAL)