Luke - the work-around fixed it. Thanks!
On Friday, January 13, 2017 at 7:46:34 AM UTC-5, Mark wrote: > > Thanks Luke and thanks for the work-around. > I will post a new issue this weekend. > > Mark > > On Friday, January 13, 2017 at 3:20:33 AM UTC-5, Luke Campagnola wrote: >> >> It's a bug! Would you mind opening a new issue on github? >> >> Here's a workaround: >> >> curve.scatter.updateSpots() >> curve.scene().update() >> >> On Wed, Jan 11, 2017 at 5:23 PM, Mark <mmen...@gmail.com> wrote: >> >>> Hi Luke - >>> >>> Thanks for all your work in pyqtgraph. >>> I'm using 0.10.0 with PyQT 5.7 on Windows 7. >>> >>> I have built a scrolling chart that loads data from a pandas dataframe >>> that is populated from another process. It creates PlotDataItems with 500 >>> data points each. Then applies np.empty() to the numpy array it and loads >>> it again with new data, etc. >>> >>> I have found that when I add a 'symbol' argument to the plot() method >>> (see below), the previous PlotDataItems do not get shifted left during the >>> shift process. However, the current PlotDataItem shifts to the left, >>> correctly, in this situation. (See the attached screenshot: >>> 'top_symbol_curve_does_not_shift_left.PNG' - you'll note lime green lines >>> at the left of the screenshot where the top symbol-based plotdataitems get >>> out of sync with the 'white line' plotdataitem. >>> >>> However, when I take out the symbol argument, the second line scrolls to >>> the left perfectly (as you probably know - this a modification from one of >>> your samples). See 'both_curves_shift_left.PNG' screenshot for how this >>> works correctly. >>> >>> >>> <SNIPPET> >>> >>> >>> for index,row in pandas_df.iterrows(): >>> move_value = move_position(0.15) # THIS IS A CALL TO A >>> FUNCTION THAT GENERATES AN INCREMENTED VALUE INSTEAD OF USING NOW() >>> TIMESTAMP >>> shift = (move_value * -1) >>> >>> for c in curves: >>> c.setPos(shift, 0) # moves the curve >>> >>> for c2 in curves2: >>> c2.setPos(shift,0) >>> >>> >>> i = ptr5 % 500 >>> if i==0: >>> curve = p5.plot() >>> curves.append(curve) >>> curve2 = p5.plot(pen=(32,178,170)) #<- WORKS FINE >>> #curve2 = p5.plot(pen=None,symbol='d', >>> symbolBrush=(32,178,170)) <- ONLY THE CURRENT PLOTDATA ITEM SHIFTS. >>> PREVIOUS ONES DO NOT >>> curves2.append(curve2) >>> >>> last = data5[-1] #return last item in the list >>> last2 = pyqt_dot_np[-1] >>> >>> data5 = np.empty([501,2]) #Return a new array of given >>> shape and type, without initializing entries. >>> pyqt_dot_np = np.empty([501,2]) >>> >>> data5[0] = last >>> pyqt_dot_np[0] = last2 >>> >>> else: >>> curve = curves[-1] #return last item in the list >>> curve2 = curves2[-1] >>> >>> vb = curve.getViewBox() >>> xrange = vb.viewRange()[0] >>> >>> >>> data5[i+1,0] = move_value >>> pyqt_dot_np[i+1,0] = move_value >>> data5[i+1,1] = row['Zscores'] # 2-D array - y values >>> curve.setData(x=data5[:i+2, 0], y=data5[:i+2, 1]) >>> pyqt_dot_np[i+1,1] = row['Zscores'] + 0.5 >>> curve2.setData(x=pyqt_dot_np[:i+2, 0], y=pyqt_dot_np[:i+2, >>> 1]) >>> >>> </SNIPPET> >>> >>> Is this a bug? >>> Do I need to do something differently to scroll previously added symbol >>> objects. >>> >>> Thanks kindly, >>> Mark >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "pyqtgraph" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to pyqtgraph+...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/pyqtgraph/165f6a48-5606-4bfd-b2e1-5c548c53012f%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/pyqtgraph/165f6a48-5606-4bfd-b2e1-5c548c53012f%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- You received this message because you are subscribed to the Google Groups "pyqtgraph" group. To unsubscribe from this group and stop receiving emails from it, send an email to pyqtgraph+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/pyqtgraph/b3cc80e9-8a38-470e-8d4b-672baf2dffa5%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
