Hi Darren,
thanks for replying
On Wed, May 27, 2009 at 21:01, Darren Dale <dsdal...@gmail.com> wrote:
> On Wed, May 27, 2009 at 9:11 AM, Sandro Tosi <mo...@debian.org> wrote:
>>
>> Hi all,
>> I'd like to adapt 'animation_blit_qt4.py' to a pure OO approach,
>> removing pylab from the code and move to something near to
>> 'embedding_in_qt4.py'.
>>
>> I tried a bit but failed miserably :(
>>
>> What I'd like to achieve is use something like in
>> 'embedding_in_qt4.py' but that can be updated using the timerEvent /
>> startTime paradigm (something similar to gobject.add_idle(func) but
>> this time for Qt4).
>>
>> Can someone please give me a help on this?
>
> Can you be more specific? Maybe post what you have along with a description
> of how it is failing?
Eheh, sorry for being so generic: I wrote that email from work, while
the code I've worked on was at home ;)
So, the situation is this:
- animation_blit_qt4.py has a nice way to update the graph "online",
using the timerEvent/startTimer
- animation_blit_qt4.py contains pylab staff (I want to avoid using)
- animation_blit_qt4.py uses the backend Qt4Agg not the backend object
- embedding_in_qt4.py uses an OO approach at embedding mpl in a qt4
widget/application.
The ultimate result I want to achieve is to embed mpl in a qt4
application but update the graph in realtime.
So I started modifying animation_blit_qt4.py to make it "more OO" :)
The attached script "animation_blit_qt4_morph.py" only replaced the
pylab parts with a mix of OO style and pyplot, and the timerEvent just
print the receive event without updating the graph.
As you can see, not much of what I need :(
What I'd like to achive is something similar to
"embedding_in_qt4_morph.py" but where the graph is updated
automatically like in an animation.
Your help will be appreciated a lot :)
Thanks,
--
Sandro Tosi (aka morph, morpheus, matrixhasu)
My website: http://matrixhasu.altervista.org/
Me at Debian: http://wiki.debian.org/SandroTosi
# For detailed comments on animation and the techniqes used here, see
# the wiki entry http://www.scipy.org/Cookbook/Matplotlib/Animations
import os, sys
import matplotlib
matplotlib.use('Qt4Agg') # qt4 example
# matplotlib Figure object
from matplotlib.figure import Figure
import matplotlib.backends.backend_qt4agg as backend
from PyQt4 import QtCore, QtGui
ITERS = 1000
#import pylab as p
import matplotlib.pyplot as plt
import numpy as npy
import time
class BlitQT(QtCore.QObject):#, backend.FigureCanvas):
def __init__(self):
self.fig = Figure()
self.ax = self.fig.add_subplot(111)
self.canvas = self.ax.figure.canvas
self.ax.grid()
# By making this a child of the canvas we make sure that it is
# destroyed first and avoids a possible exception when the user clicks
# on the window's close box.
QtCore.QObject.__init__(self, self.canvas)
self.cnt = 0
# create the initial line
self.x = npy.arange(0,2*npy.pi,0.01)
self.line, = self.ax.plot(self.x, npy.sin(self.x), animated=True, lw=2)
#self.background = None
#self.old_size = 0, 0
plt.draw()
#backend.show()
def timerEvent(self, evt):
# See if the size has changed since last time round.
#current_size = self.ax.bbox.width, self.ax.bbox.height
print evt
#if self.old_size != current_size:
# self.old_size = current_size
# self.background = self.canvas.copy_from_bbox(self.ax.bbox)
# restore the clean slate background
#self.canvas.restore_region(self.background)
# update the data
self.line.set_ydata(npy.sin(self.x+self.cnt/10.0))
plt.draw()
# just draw the animated artist
#self.ax.draw_artist(self.line)
# just redraw the axes rectangle
#self.canvas.blit(self.ax.bbox)
if self.cnt==ITERS:
# print the timing info and quit
print 'FPS:' , ITERS/(time.time()-self.tstart)
sys.exit()
else:
self.cnt += 1
#p.subplots_adjust(left=0.3, bottom=0.3) # check for flipy bugs
#p.grid() # to ensure proper background restore
app = BlitQT()
# for profiling
app.tstart = time.time()
app.startTimer(100)
backend.show()
#!/usr/bin/env python
# for command-line arguments
import sys
# Python Qt4 bindings
from PyQt4 import QtGui
# standard Matplotlib imports
import numpy as np
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
class Qt4MplCanvas(FigureCanvas):
"""Ultimately, this is a QWidget (as well as a FigureCanvasAgg, etc.)."""
def __init__(self):
self.fig = Figure()
self.axes = self.fig.add_subplot(111)
# We want the axes cleared every time plot() is called
self.axes.hold(False)
self.x = np.arange(0.0, 3.0, 0.01)
self.y = np.cos(2*np.pi*self.x)
self.axes.plot(self.x, self.y)
FigureCanvas.__init__(self, self.fig)
qApp = QtGui.QApplication(sys.argv)
mpl = Qt4MplCanvas()
mpl.show()
sys.exit(qApp.exec_())
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