layout_problem - GitPress.io

Example Python program layout_problem.py This program creates a PyQt GUI

Modules

import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QSlider, QScrollArea, QFrame, QPushButton
from PyQt5.QtWidgets import QVBoxLayout, QHBoxLayout
from vispy.scene import SceneCanvas, PanZoomCamera

Classes

class Left(QHBoxLayout):
class Right(QFrame):
class Viewer(QWidget):
class Window:

Methods

def init(self):
def init(self):
def init(self):
def init(self):
def add_viewer(self):
def resize(self, *args):
def show(self):
def main():

Code

Example Python PyQt program :

"""This gist created to demonstrate an layout error, however, problem is solved with switching to anaconda/python
"""
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QSlider, QScrollArea, QFrame, QPushButton
from PyQt5.QtWidgets import QVBoxLayout, QHBoxLayout
from vispy.scene import SceneCanvas, PanZoomCamera


class Left(QHBoxLayout):
    def __init__(self):
        super().__init__()
        self.addWidget(QSlider(Qt.Vertical))
        self.addWidget(QSlider(Qt.Vertical))


class Right(QFrame):
    def __init__(self):
        super().__init__()
        dim_buttons_layout = QHBoxLayout()
        dim_buttons_layout.addWidget(QPushButton("1D"))
        dim_buttons_layout.addWidget(QPushButton("2D"))
        dim_buttons_layout.addWidget(QPushButton("3D"))

        Right_layout = QVBoxLayout()
        Right_layout.addLayout(dim_buttons_layout)
        Right_layout.addWidget(QPushButton("asdF"))
        Right_layout.addWidget(QPushButton("fdsA"))

        self.setLayout(Right_layout)


class Viewer(QWidget):
    def __init__(self):
        super().__init__()
        self.canvas = SceneCanvas(keys=None, vsync=True)

        layout = QVBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        self.setLayout(layout)

        # layout.addWidget(self.canvas.native)

        self.view = self.canvas.central_widget.add_view()
        self.view.camera = PanZoomCamera(aspect=1)
        self.view.camera.flip = (0, 1, 0)
        self.view.camera.set_range()


class Window:
    def __init__(self):
        self._qt_window = QMainWindow()
        self._qt_central_widget = QWidget()
        self._qt_window.setCentralWidget(self._qt_central_widget)
        self._qt_central_widget.setLayout(QHBoxLayout())
        self._qt_window.statusBar().showMessage('Ready For Action')

    def add_viewer(self):
        left = Left()
        right = Right()
        viewer = Viewer()
        self._qt_central_widget.layout().addLayout(left)
        self._qt_central_widget.layout().addWidget(viewer)
        self._qt_central_widget.layout().addWidget(right)

    def resize(self, *args):
        self._qt_window.resize(*args)

    def show(self):
        self.resize(self._qt_window.layout().sizeHint())
        self._qt_window.show()
        self._qt_window.raise_()


def main():
    win = Window()
    win.add_viewer()
    win.show()
    return win

if __name__ == '__main__':
    application = QApplication(sys.argv)
    main_win = main()
    sys.exit(application.exec_())

Useful Links

Articles: https://python-commandments.org/
PyQt: https://pythonpyqt.com/
Tutorial: https://pythonprogramminglanguage.com/