如何在子图中加上鼠标点击和滚轮事件

如何在子图中加上鼠标点击和滚轮事件

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_())

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