QPushButton.setMenu (self, QMenu menu) using code generated from Qt Designer

Question

I am trying to create a Pop-Up push button using Qt5 Designer tool. I designed the gui in qt designer and then using pyuic5 converted it .py file. But I cannot seem to change the default push button added by drag-and-drop using qt designer into a pop styled button that when clicked will give me options such as Bar,Scatter,Box Plots. What I want to do is create a pop-up button that will give the options Bar,Scatter,Box and when i choose the respected option, the label changes to a loaded image. The code is as below :

# Form implementation generated from reading ui file 'adcombo.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
from PyQt5.QtGui import QIcon, QPixmap

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(6, 10, 791, 361))
        self.label.setFrameShape(QtWidgets.QFrame.WinPanel)
        self.label.setText("")
        self.label.setObjectName("label")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(120, 430, 231, 91))
        self.pushButton.setStyleSheet("color: rgb(255, 0, 0);\n"
"background-color: rgb(79, 79, 79);\n"
"font: 75 16pt \"MS Shell Dlg 2\";")
        self.pushButton.setObjectName("pushButton")
        self.comboBox = QtWidgets.QComboBox(self.centralwidget)
        self.comboBox.setGeometry(QtCore.QRect(410, 430, 301, 91))
        self.comboBox.setStyleSheet("color: rgb(255, 0, 0);\n"
"background-color: rgb(79, 79, 79);\n"
"font: 75 16pt \"MS Shell Dlg 2\";")
        self.comboBox.setObjectName("comboBox")
        self.comboBox.addItem("")
        self.comboBox.setItemText(0, "")
        self.comboBox.addItem("")
        self.comboBox.addItem("")
        self.comboBox.addItem("")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

        self.comboBox.setVisible(False)
        self.comboBox.currentTextChanged.connect(self.on_combobox_changed)
        self.pushButton.clicked.connect(self.onclick)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "Chart Type"))
        self.comboBox.setItemText(1, _translate("MainWindow", "Bar"))
        self.comboBox.setItemText(2, _translate("MainWindow", "Scatter"))
        self.comboBox.setItemText(3, _translate("MainWindow", "Box"))

    def onclick(self) :
        self.comboBox.setVisible(True)


    def on_combobox_changed(self) :
        if self.comboBox.currentText()=='Bar' :
            bar = QPixmap('bar.png')
            self.label.setPixmap(bar)

        if self.comboBox.currentText()=='Scatter' :
            scatter= QPixmap('scatter.png')
            self.label.setPixmap(scatter)

        if self.comboBox.currentText()=='Box' :
            box = QPixmap('box.png')
            self.label.setPixmap(box)
            #self.label.setText('Line Chart')

        if self.comboBox.currentText()=='' :
            self.label.clear()


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

Any and all help will be appreciated.

Thanks

UPDATE 1 I want to edit the above code to have a button like the one in the picture below.

Answer 1

You have to create a QMenu, set the QActions and use the triggered signal to know that QAction was pressed.

# Form implementation generated from reading ui file 'adcombo.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
from PyQt5.QtGui import QIcon, QPixmap

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(6, 10, 791, 361))
        self.label.setFrameShape(QtWidgets.QFrame.WinPanel)
        self.label.setText("")
        self.label.setObjectName("label")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(120, 430, 231, 91))
        self.pushButton.setStyleSheet("color: rgb(255, 0, 0);\n"
"background-color: rgb(79, 79, 79);\n"
"font: 75 16pt \"MS Shell Dlg 2\";")
        self.pushButton.setObjectName("pushButton")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "Chart Type"))


class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)
        self.create_menu()

    def create_menu(self):
        menu = QtWidgets.QMenu(
            self.pushButton, 
            triggered=self.on_menu_triggered
        )
        for text in ("", "Bar", "Scatter", "Box"):
            menu.addAction(text)
        self.pushButton.setMenu(menu)

    @QtCore.pyqtSlot(QtWidgets.QAction)
    def on_menu_triggered(self, action):
        pixmap = QtGui.QPixmap()
        if not action.text():
            self.label.clear()
            return
        if action.text() == 'Bar':
            pixmap = QPixmap('bar.png')
        elif action.text() == 'Scatter':
            pixmap= QPixmap('scatter.png')
        elif action.text() == 'Box':
            pixmap = QPixmap('box.png')
        self.label.setPixmap(pixmap)

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())