If you want to use it in the example section or anything else, you are
welcome.
greetings
Till
#!/usr/bin/env python
# embedding_in_qt4.py --- Simple Qt4 application embedding matplotlib
canvases
# It also shows, that normal plotting is quite slow.
#
# 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.
import sys, os, random
from PyQt4 import QtGui, QtCore
from numpy import arange, sin, pi
from numpy.random import randn, randint
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 MyStaticMplCanvas(MyMplCanvas):
"""Simple canvas with a sine plot."""
def compute_initial_figure(self):
t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*t)
self.axes.plot(t, s)
class MyDynamicMplCanvas(MyMplCanvas):
"""A canvas that updates itself every second with a new plot."""
def __init__(self, *args, **kwargs):
MyMplCanvas.__init__(self, *args, **kwargs)
self.timer = QtCore.QTimer(self)
QtCore.QObject.connect(self.timer, QtCore.SIGNAL("timeout()"),
self.update_figure)
self.timer.start(1000)
def compute_initial_figure(self):
self.axes.plot(arange(4), randint(0, 10, 4), 'r')
def update_figure(self):
# Build a list of 4 random integers between 0 and 10 (both
inclusive)
l = randint(0, 10, 4)
self.axes.plot(arange(1, 5), l, 'r')
self.draw()
def stop_timer(self):
self.timer.stop()
class MyBlittMplCanvas(MyMplCanvas):
""""A canvas thats updates itself as fast a possible, using blitting."""
def __init__(self, *args, **kwargs):
MyMplCanvas.__init__(self, *args, **kwargs)
#self.draw()
self.old_size = self.axes.bbox.width, self.axes.bbox.height
self.ax_background = self.copy_from_bbox(self.axes.bbox)
self.cnt = 0
self.axes.set_autoscale_on(False)
#self.draw()
self.timer=QtCore.QTimer()
self.connect(self.timer, QtCore.SIGNAL("timeout()"),
self.update_figure)
self.timer.start(0)
def blit(self, bbox=None):
self.replot = bbox
l, b, w, h = bbox.bounds
t = b + h
self.repaint(l, self.renderer.height-t, w, h)
def compute_initial_figure(self):
self.t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*self.t)+randn(len(self.t))
self.line=self.axes.plot(self.t, s)[0]
def update_figure(self):
current_size = self.axes.bbox.width, self.axes.bbox.height
if self.old_size != current_size:
self.old_size = current_size
self.axes.clear()
self.axes.grid()
self.draw()
self.ax_background = self.copy_from_bbox(self.axes.bbox)
self.restore_region(self.ax_background, bbox=self.axes.bbox)
# update the data
self.line.set_ydata(sin(2*pi*self.t)+randn(len(self.t)))
# just draw the animated artist
self.axes.draw_artist(self.line)
# just redraw the axes rectangle
self.blit(self.axes.bbox)
class ApplicationWindow(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.setWindowTitle("application main window")
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)
l = QtGui.QVBoxLayout(self.main_widget)
sc = MyStaticMplCanvas(self.main_widget, width=5, height=4, dpi=100)
dc = MyDynamicMplCanvas(self.main_widget, width=5, height=4,
dpi=100)
bc = MyBlittMplCanvas(self.main_widget, width=5, height=4, dpi=100)
stopdc=QtGui.QPushButton("Stop dynamic Timer")
self.connect(stopdc, QtCore.SIGNAL("clicked()"), dc.stop_timer)
l.addWidget(sc)
l.addWidget(dc)
l.addWidget(stopdc)
l.addWidget(bc)
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 %s" % progname,
u"""%(prog)s version %(version)s
Copyright \N{COPYRIGHT SIGN} 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."""
% {"prog": progname, "version": progversion})
qApp = QtGui.QApplication(sys.argv)
aw = ApplicationWindow()
aw.setWindowTitle("%s" % progname)
aw.show()
sys.exit(qApp.exec_())
#qApp.exec_()
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