python - Blank screen in background - PyQt4 + matplotlib1.4.3 -


i'm running issue when trying call matplotlib figures pyqt gui. figures display fine, appear ugly blank grey screen behind both gui , figure. not go away until have closed gui.

here's section of gui in call function, in script, should display graph. post whole thing it's quite long. 

def readsignal(self):     signal = self.buttongroup.checkedid() #reads integer signal analysis options     timestamps,deltapix,fps=motiontools.loaddata(self.filenames+"/")      if signal == 1:         motiontools.motioninroi(timestamps,deltapix)     elif signal == 2:         motiontools.bartimeinroi(deltapix)     else:         self.analysisoptionerror.show()

both of these motiontools functions use data (timestamps , deltapix slices of arrays, fps frames-per-second integer) generate different graphs. here's example of 1 of them (bartimeinroi) - both cause grey screen error.

# bar graph of total time , pixels in each roi deltapix = deltapix[:,1:] # rid of background columns  framerate = getframerate()  rows,cols = deltapix.shape  pixsums = np.sum(deltapix, axis=0) deltapix[deltapix>0]=1 # convert pixels time moving timesums = np.sum(deltapix, axis=0) / framerate  f, (ax1, ax2) = plt.subplots(2, sharex=true)  ax1.bar(np.arange(cols) + 1, pixsums, align='center') ax2.bar(np.arange(cols) + 1, timesums, align='center')  plt.xlabel('roi number', fontsize=18) plt.xlim(0,cols+1)  ax1.set_ylabel('locomotion \n(displaced pixels)', fontsize=18, va='center') ax1.yaxis.labelpad = 25 ax2.set_ylabel('locomotion  \n(seconds motion)', fontsize=18, va='center') ax2.yaxis.labelpad = 25  f.set_facecolor('w') plt.tick_params(axis='both', which='major', labelsize=18)  if cols < 21:     plt.xticks(np.arange(1, cols+1, 1)) else:     plt.xticks(np.arange(1, cols+1, 5)) plt.show()

any ideas? have embed matplotlib graphs in interface?


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