Displaying vpl.mesh_plot in PyQT5

Question

I need to render an .stl image on an user interface.

I created the UI with PyQt5, and I have managed to render the .stl image with vplotlib. However, I am having problems with displaying this vpl.mesh_plot on the Qframe that I have on UI (name: self.ui.MyQframe; the window does not necessarily need to be of this type, can also be QGraphicsViewer or else).

This is the function that renders the .stl image:

import vtkplotlib as vpl
from stl.mesh import Mesh
def setScan(self):
        path, _ = QtWidgets.QFileDialog.getOpenFileName(None, "Select Image", "",
                                                            "stl Files (*.stl)")  # Ask for file
        mesh = Mesh.from_file(path)

        vpl.mesh_plot(path)

        vpl.mesh_plot(mesh)

        vpl.show()

##Edit 1: Based on Eyllanesc's answer I changed the QFrame to QtWidget, and set fig=self.MyQtWidget in each vpl.mesh_ ... + changed show() accordingly.

However, it still opens up as a new window & I'm not sure why.

def setScan(self):
    path, _ = QtWidgets.QFileDialog.getOpenFileName(None, "Select Image", "",
                                                        "stl Files (*.stl)")  
    mesh = Mesh.from_file(path)
    self.MyQtWidget = vpl.QtFigure()

    vpl.mesh_plot(path,fig=self.MyQtWidget)

    vpl.mesh_plot(mesh,fig=self.MyQtWidget)
    self.MyQtWidget.show()

Answer 1

You have to use QtFigure which is QWidget:

import sys

import vtkplotlib as vpl
from PyQt5 import QtWidgets
from stl.mesh import Mesh


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()

        central_widget = QtWidgets.QWidget()
        self.setCentralWidget(central_widget)
        vbox = QtWidgets.QVBoxLayout(central_widget)

        button = QtWidgets.QPushButton("Select STL")
        self.figure = vpl.QtFigure()
        vbox.addWidget(button)
        vbox.addWidget(self.figure)

        button.clicked.connect(self.select_filename)
        self.figure.show()

    def select_filename(self):
        path, _ = QtWidgets.QFileDialog.getOpenFileName(
            None, "Select Image", "", "stl Files (*.stl)"
        )
        if path:
            self.load_mesh(path)

    def load_mesh(self, filename):
        mesh = Mesh.from_file(filename)
        vpl.mesh_plot(mesh, fig=self.figure)


app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())