.. note:: :class: sphx-glr-download-link-note Click :ref:`here ` to download the full example code .. rst-class:: sphx-glr-example-title .. _sphx_glr_gallery_user_interfaces_embedding_in_qt_sgskip.py: =============== Embedding in Qt =============== Simple Qt application embedding Matplotlib canvases. This program will work equally well using Qt4 and Qt5. Either version of Qt can be selected (for example) by setting the ``MPLBACKEND`` environment variable to "Qt4Agg" or "Qt5Agg", or by first importing the desired version of PyQt. .. code-block:: python import sys import time import numpy as np from matplotlib.backends.qt_compat import QtCore, QtWidgets, is_pyqt5 if is_pyqt5(): from matplotlib.backends.backend_qt5agg import ( FigureCanvas, NavigationToolbar2QT as NavigationToolbar) else: from matplotlib.backends.backend_qt4agg import ( FigureCanvas, NavigationToolbar2QT as NavigationToolbar) from matplotlib.figure import Figure class ApplicationWindow(QtWidgets.QMainWindow): def __init__(self): super().__init__() self._main = QtWidgets.QWidget() self.setCentralWidget(self._main) layout = QtWidgets.QVBoxLayout(self._main) static_canvas = FigureCanvas(Figure(figsize=(5, 3))) layout.addWidget(static_canvas) self.addToolBar(NavigationToolbar(static_canvas, self)) dynamic_canvas = FigureCanvas(Figure(figsize=(5, 3))) layout.addWidget(dynamic_canvas) self.addToolBar(QtCore.Qt.BottomToolBarArea, NavigationToolbar(dynamic_canvas, self)) self._static_ax = static_canvas.figure.subplots() t = np.linspace(0, 10, 501) self._static_ax.plot(t, np.tan(t), ".") self._dynamic_ax = dynamic_canvas.figure.subplots() self._timer = dynamic_canvas.new_timer( 100, [(self._update_canvas, (), {})]) self._timer.start() def _update_canvas(self): self._dynamic_ax.clear() t = np.linspace(0, 10, 101) # Shift the sinusoid as a function of time. self._dynamic_ax.plot(t, np.sin(t + time.time())) self._dynamic_ax.figure.canvas.draw() if __name__ == "__main__": qapp = QtWidgets.QApplication(sys.argv) app = ApplicationWindow() app.show() qapp.exec_() .. _sphx_glr_download_gallery_user_interfaces_embedding_in_qt_sgskip.py: .. only :: html .. container:: sphx-glr-footer :class: sphx-glr-footer-example .. container:: sphx-glr-download :download:`Download Python source code: embedding_in_qt_sgskip.py ` .. container:: sphx-glr-download :download:`Download Jupyter notebook: embedding_in_qt_sgskip.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature Keywords: matplotlib code example, codex, python plot, pyplot `Gallery generated by Sphinx-Gallery `_