I took the example that ships with 1.3.0 and have modified it to use a grid
layout and show 9 graphs in a 3x3 grid.
When I do this it, other widgets become rather unresponsive.
Is there a way to fix this?
Somehow offload whatever is hogging CPU onto another thread or something?
Below is the code....
Thanks,
~Eric
#!/usr/bin/env python
# embedding_in_qt4.py --- Simple Qt4 application embedding matplotlib
canvases
#
# Copyright (C) 2005 Florent Rougon
# 2006 Darren Dale
#
# This file is an example program for matplotlib. It may be used and
# modified with no restriction; raw copies as well as modified versions
# may be distributed without limitation.
from __future__ import unicode_literals
import sys, os, random
from PyQt4 import QtGui, QtCore
from numpy import arange, sin, pi
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as
FigureCanvas
from matplotlib.figure import Figure
progname = os.path.basename(sys.argv[0])
progversion = "0.1"
class MyMplCanvas(FigureCanvas):
"""Ultimately, this is a QWidget (as well as a FigureCanvasAgg,
etc.)."""
def __init__(self, parent=None, width=5, height=4, dpi=100):
fig = Figure(figsize=(width, height), dpi=dpi)
self.axes = fig.add_subplot(111)
# We want the axes cleared every time plot() is called
self.axes.hold(False)
self.compute_initial_figure()
#
FigureCanvas.__init__(self, fig)
self.setParent(parent)
FigureCanvas.setSizePolicy(self,
QtGui.QSizePolicy.Expanding,
QtGui.QSizePolicy.Expanding)
FigureCanvas.updateGeometry(self)
def compute_initial_figure(self):
pass
class MyDynamicMplCanvas(MyMplCanvas):
"""A canvas that updates itself every second with a new plot."""
def __init__(self, *args, **kwargs):
MyMplCanvas.__init__(self, *args, **kwargs)
timer = QtCore.QTimer(self)
QtCore.QObject.connect(timer, QtCore.SIGNAL("timeout()"),
self.update_figure)
timer.start(750)
def compute_initial_figure(self):
self.axes.plot([0, 1, 2, 3], [1, 2, 0, 4], 'r')
def update_figure(self):
# Build a list of 4 random integers between 0 and 10 (both
inclusive)
l = [ random.randint(0, 10) for i in range(4) ]
self.axes.plot([0, 1, 2, 3], l, 'r')
self.draw()
class ApplicationWindow(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.setWindowTitle("Unresponsive Application")
self.file_menu = QtGui.QMenu('&File', self)
self.file_menu.addAction('&Quit', self.fileQuit, QtCore.Qt.CTRL +
QtCore.Qt.Key_Q)
self.menuBar().addMenu(self.file_menu)
self.help_menu = QtGui.QMenu('&Help', self)
self.menuBar().addSeparator()
self.menuBar().addMenu(self.help_menu)
self.help_menu.addAction('&About', self.about)
self.main_widget = QtGui.QWidget(self)
main_layout = QtGui.QVBoxLayout()
chart_layout = QtGui.QGridLayout()
for row in range(3):
for col in range(3):
dc = MyDynamicMplCanvas(self.main_widget, width=5,
height=4, dpi=100)
chart_layout.addWidget(dc, row, col)
main_layout.addWidget(QtGui.QPushButton("Unresponsive"))
main_layout.addWidget(QtGui.QPushButton("Widgets"))
horizontalSlider = QtGui.QSlider()
horizontalSlider.setOrientation(QtCore.Qt.Horizontal)
main_layout.addWidget(horizontalSlider)
main_layout.addLayout(chart_layout)
self.main_widget.setLayout(main_layout)
self.main_widget.setFocus()
self.setCentralWidget(self.main_widget)
self.statusBar().showMessage("All hail matplotlib!", 2000)
def fileQuit(self):
self.close()
def closeEvent(self, ce):
self.fileQuit()
def about(self):
QtGui.QMessageBox.about(self, "About",
"""embedding_in_qt4.py example
Copyright 2005 Florent Rougon, 2006 Darren Dale
This program is a simple example of a Qt4 application embedding matplotlib
canvases.
It may be used and modified with no restriction; raw copies as well as
modified versions may be distributed without limitation."""
)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
aw = ApplicationWindow()
aw.show()
sys.exit(app.exec_())
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