下列代码如何在子图中加上鼠标点击和滚轮事件
--coding:utf-8--
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys
import numpy as np
from testplot2pyqt5 import Ui_Dialog
import matplotlib
matplotlib.use("Qt5Agg") # 声明使用QT5
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
import matplotlib.pyplot as plt
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(718, 515)
self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
self.buttonBox.setGeometry(QtCore.QRect(370, 470, 341, 32))
self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
self.buttonBox.setObjectName("buttonBox")
self.widget = QtWidgets.QWidget(Dialog)
self.widget.setGeometry(QtCore.QRect(10, 10, 691, 451))
self.widget.setObjectName("widget")
self.groupBox = QtWidgets.QGroupBox(self.widget)
self.groupBox.setGeometry(QtCore.QRect(0, 0, 691, 451))
self.groupBox.setObjectName("groupBox")
self.retranslateUi(Dialog)
self.buttonBox.accepted.connect(Dialog.accept)
self.buttonBox.rejected.connect(Dialog.reject)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.groupBox.setTitle(_translate("Dialog", "GroupBox_Matplotlib的图形显示："))
创建一个matplotlib图形绘制类
class MyFigure(FigureCanvas):
def __init__(self,width=5, height=4, dpi=100):
#第一步：创建一个创建Figure
self.fig = Figure(figsize=(width, height), dpi=dpi)
#第二步：在父类中激活Figure窗口
super(MyFigure,self).__init__(self.fig) #此句必不可少，否则不能显示图形
#第三步：创建一个子图，用于绘制图形用，111表示子图编号，如matlab的subplot(1,1,1)
self.axes = self.fig.add_subplot(111)
#第四步：就是画图，【可以在此类中画，也可以在其它类中画】
def plotsin(self):
self.axes0 = self.fig.add_subplot(111)
t = np.arange(0.0, 3.0, 0.01)
s = np.sin(2 * np.pi * t)
self.axes0.plot(t, s)
def plotcos(self):
t = np.arange(0.0, 3.0, 0.01)
s = np.sin(2 * np.pi * t)
self.axes.plot(t, s)
class MainDialogImgBW(QDialog,Ui_Dialog):
def __init__(self):
super(MainDialogImgBW,self).__init__()
self.setupUi(self)
self.setWindowTitle("显示matplotlib绘制图形")
self.setMinimumSize(0,0)
#第五步：定义MyFigure类的一个实例
self.F = MyFigure(width=3, height=2, dpi=100)
#self.F.plotsin()
self.plotcos()
#第六步：在GUI的groupBox中创建一个布局，用于添加MyFigure类的实例（即图形）后其他部件。
self.gridlayout = QGridLayout(self.groupBox) # 继承容器groupBox
self.gridlayout.addWidget(self.F,0,1)
#补充：另创建一个实例绘图并显示
self.plotother()
cid = self.F.canvas.mpl_connect('button_press_event', self.onclick)
def plotcos(self):
t = np.arange(0.0, 5.0, 0.01)
s = np.cos(2 * np.pi * t)
self.F.axes.plot(t, s)
self.F.fig.suptitle("cos")
def plotother(self):
F1 = MyFigure(width=5, height=4, dpi=100)
F1.fig.suptitle("Figuer_4")
F1.axes1 = F1.fig.add_subplot(221)
x = np.arange(0, 50)
y = np.random.rand(50)
F1.axes1.hist(y, bins=50)
F1.axes1.plot(x, y)
F1.axes1.bar(x, y)
F1.axes1.set_title("hist")
F1.axes2 = F1.fig.add_subplot(222)
## 调用figure下面的add_subplot方法，类似于matplotlib.pyplot下面的subplot方法
x = [1, 2, 3, 4, 5, 6, 7, 8, 9]
y = [23, 21, 32, 13, 3, 132, 13, 3, 1]
F1.axes2.plot(x, y)
F1.axes2.set_title("line")
# 散点图
F1.axes3 = F1.fig.add_subplot(223)
F1.axes3.scatter(np.random.rand(20), np.random.rand(20))
F1.axes3.set_title("scatter")
# 折线图
F1.axes4 = F1.fig.add_subplot(224)
x = np.arange(0, 5, 0.1)
F1.axes4.plot(x, np.sin(x), x, np.cos(x))
F1.axes4.set_title("sincos")
self.gridlayout.addWidget(F1, 0, 2)
def onclick(self,event):
'''
Event handler for button_press_event
@param event MouseEvent
'''
print ("hhh")
if name == "__main__":
app = QApplication(sys.argv)
main = MainDialogImgBW()
main.show()
#app.installEventFilter(main)
sys.exit(app.exec_())
