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# -*- coding: utf-8 -*-
# Copyright (c) Vispy Development Team. All Rights Reserved.
# Distributed under the (new) BSD License. See LICENSE.txt for more info.
# Force the selection of an application backend. If the user has already
# imported PyQt or PySide, this should result in selection of the corresponding
# backend.
from .backends import qt_lib
if qt_lib is None:
raise RuntimeError("Module backends._qt should not be imported directly.")
elif qt_lib in 'pyqt4':
from PyQt4 import QtGui
QWidget, QGridLayout = QtGui.QWidget, QtGui.QGridLayout # Compat
elif qt_lib == 'pyside':
from PySide import QtGui
QWidget, QGridLayout = QtGui.QWidget, QtGui.QGridLayout # Compat
elif qt_lib == 'pyqt5':
from PyQt5 import QtWidgets
QWidget, QGridLayout = QtWidgets.QWidget, QtWidgets.QGridLayout # Compat
elif qt_lib == 'pyqt6':
from PyQt6 import QtWidgets
QWidget, QGridLayout = QtWidgets.QWidget, QtWidgets.QGridLayout # Compat
elif qt_lib == 'pyside2':
from PySide2 import QtWidgets
QWidget, QGridLayout = QtWidgets.QWidget, QtWidgets.QGridLayout # Compat
elif qt_lib == 'pyside6':
from PySide6 import QtWidgets
QWidget, QGridLayout = QtWidgets.QWidget, QtWidgets.QGridLayout # Compat
elif qt_lib:
raise RuntimeError("Invalid value for qt_lib %r." % qt_lib)
else:
raise RuntimeError("Module backends._qt should not be imported directly.")
class QtCanvas(QWidget):
"""Qt widget containing a vispy Canvas.
This is a convenience class that allows a vispy canvas to be embedded
directly into a Qt application.
All methods and properties of the Canvas are wrapped by this class.
Parameters
----------
parent : QWidget or None
The Qt parent to assign to this widget.
canvas : instance or subclass of Canvas
The vispy Canvas to display inside this widget, or a Canvas subclass
to instantiate using any remaining keyword arguments.
"""
def __init__(self, parent=None, canvas=None, **kwargs):
from .canvas import Canvas
if canvas is None:
canvas = Canvas
if issubclass(canvas, Canvas):
canvas = canvas(**kwargs)
elif len(**kwargs) > 0:
raise TypeError('Invalid keyword arguments: %s' %
list(kwargs.keys()))
if not isinstance(canvas, Canvas):
raise TypeError('canvas argument must be an instance or subclass '
'of Canvas.')
QWidget.__init__(self, parent)
self.layout = QGridLayout()
self.setLayout(self.layout)
self.layout.setContentsMargins(0, 0, 0, 0)
self._canvas = canvas
self.layout.addWidget(canvas.native)
self.setSizePolicy(canvas.native.sizePolicy())
def __getattr__(self, attr):
if hasattr(self._canvas, attr):
return getattr(self._canvas, attr)
else:
raise AttributeError(attr)
def update(self):
"""Call update() on both this widget and the internal canvas."""
QWidget.update(self)
self._canvas.update()
class QtSceneCanvas(QtCanvas):
"""Convenience class embedding a vispy SceneCanvas inside a QWidget.
See QtCanvas.
"""
def __init__(self, parent=None, **kwargs):
from ..scene.canvas import SceneCanvas
QtCanvas.__init__(self, parent, canvas=SceneCanvas, **kwargs)
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