embedding a plot function in existing wxapp GUI, problem replotting

Hi,

We have been working on a python wx app GUI for finding and
selecting metadata (lots of lists and check boxes) from a test (that later
fetches SQL time-history data for further processing in LabView or elsewhere).

As an afterthought, we decided to add in a small function
that would allow previewing (plotting) of time-history data based on the
selected metadata. The objective is to have a window pop up with the plotted
time history data and allow the user to zoom, scroll etc, without closing or
exiting the original GUI for selecting the metadata. The reason I want a pop up
window is because I don’t want to change the original metadata selection GUI
(it’s too complicated)

What I’ve done so far is:

Added a button to the metadata GUI called “plot”.
In the “OnPlotButton” event handler I embedded the plotting code.

The “plot” button works fine when I click it the
first time. However, problems occur when I decide to plot a different set of
data (without starting over the metadata GUI). I’d like to choose some
new metadata, then click on the plot button again. But as of present, this
causes the figure to show a gray image (no lines plotted) and then both GUIs
hang up. I’ve tried closing the figure manually prior to selecting new
metadata and clicking on “plot” but it still causes the metadata
GUI to lock up.

Based on what I’ve been reading regarding MPL, it
seems that the matplotlib show() function causes another instance of a GUI loop
to remain suspended.

Is there any way to get the pop-up figure to show the time-history
data and remain interactive (zoom, scroll, etc) and be able to re-plot or “replace”
the current plot? I thought about using the draw() function but I couldn’t
get it to “pop-up” the figure. Also, if I’m not mistaken, the
draw() function doesn’t allow for interactive control?

I think this issue is similar to the issue described here: http://mail.python.org/pipermail/pythonmac-sig/2005-March/013365.html
but I can’t seem to find a simple solution, without embedding the plot
figure directly into the existing GUI (not something easy to do as I’m
not a very experienced Python programmer)

Please let me know if anyone can help.

Here is my code:

def OnPlotButton(self, event):

    global SelTestID,

SelRunList, SelEventID, SelChanList, SelCycList

    if

self.notebook.GetSelection() == 0:

SelTestID = self.listCtrlStatus.GetItem(0,1).GetText()#.strip(",
“).split(”, ")

if self.listCtrlStatus.GetItem(2,0).GetText() == "Event Selected: ":

SelRunList = self.listCtrlStatus.GetItem(1,1).GetText().strip(",
“).split(”, ")

SelChanList = []

SelCycList = []

SelEventID = self.listCtrlStatus.GetItem(2,1).GetText()#.strip(",
“).split(”, ")

else:

if self.listCtrlStatus.GetItem(1,1).GetText() == “All”:

SelRunList = []

for iRun in range(self.checkListRuns.GetItemCount()):

SelRunList.append(str(self.checkListRuns.GetItemText(iRun)))

else:

SelRunList = self.listCtrlStatus.GetItem(1,1).GetText().strip(",
“).split(”, ")

SelChanList = self.checkListBoxChans.GetCheckedStrings()

if self.listCtrlStatus.GetItem(3,1).GetText() == “All”:

SelCycList = []

else:

SelCycList = self.listCtrlStatus.GetItem(3,1).GetText().strip(",
“).split(”, ")

SelEventID = ‘’

    elif

self.notebook.GetSelection() == 1:

SelTestID = self.listCtrlStatus.GetItem(0,1).GetText()#.strip(",
“).split(”, ")

SelRunList = self.listCtrlStatus.GetItem(1,1).GetText().strip(",
“).split(”, ")

SelChanList = []

SelCycList = []

SelEventID = ‘’

    ##VTS.MsgBox("Test","eWO:

" + SelTestID + "\nRuns: " + str(SelRunList) + "\nChans:
" + str(SelChanList) + "\nCycles: " + str(SelCycList) +
"\nEvent: " + SelEventID)

    #cleanup to

prevent memory leak if previously plotted

    plt.close('all')

##make sure all figure windows are closed

    fig = []

    ax = []

    #prep data for

plotting plotting

    myeWO =

str(SelTestID)

    nRuns =

len(SelRunList)

    myRuns = []

    for iRuns in

range(nRuns):

myRuns.append(str(SelRunList[iRuns]))

    nChans =

len(SelChanList)

    myChans = []

    for iChan in

range(nChans):

myChans.append(str(SelChanList[iChan]))

    dataLst =

VTS.FetchSQLRunDataByName(myeWO, myRuns, myChans)

    lenData =

len(dataLst)

    dataArry =

np.zeros((lenData, nChans + 1))

    for iPoint in

range(lenData):

dataArry[iPoint] = dataLst[iPoint]

    #begin plotting

    fig =

plt.figure(1)

    ax =

fig.add_subplot(111)

    myPlotLines = []

    for iChan in

range(nChans):

tempLine, = ax.plot(dataArry[:,0], dataArry[:,iChan+1], label = myChans[iChan])

myPlotLines.append(tempLine)

    myTitle =

plt.title('eWO: ’ + myeWO + '\nRun IDs: ’ + str(myRuns))

    ax.grid('on')

##plt.legend(loc=0)

    myLegend =

plt.legend(loc=0)

    legTxt  =

myLegend.get_texts() ##get legent text

    plt.setp(legTxt,

fontsize=‘small’) ##set legend text fontsize to small

    myXLabel =

plt.xlabel(‘Time (s)’)

##VTS.MsgBox(“Test”,"eWO: " + SelTestID + "\neWO type:
" + str(type(SelTestID)) + "\nRuns: " + str(myRuns) +
"\nnRuns " + str(nRuns) + "\nChans: " + str(myChans) +
"\nnChans: " + str(nChans) + "\nEvent: " + SelEventID)

    plt.show()

    event.Skip()

Krishna ** ** Adrianto Pribadi****

Test Engineer

Desk (TTF): 256.480.4450

Cell: 412.401.1477

Harley-Davidson Motor Co.

Talladega Test Facility

Vehicle Test Stands (VTS)

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Pribadi, Krishna wrote:

Based on what I’ve been reading regarding MPL, it seems that the matplotlib show() function causes another instance of a GUI loop to remain suspended.

right --don't use show(), in fact, don't use pylab for the most part:

http://www.scipy.org/Cookbook/Matplotlib/EmbeddingInWx

and see the "embedding_in_wx" examples as well.

I personally like wxMPL:

http://agni.phys.iit.edu/~kmcivor/wxmpl/

-Chris

···

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Chris.Barker@...259...

I would agree with Chris that you should bite the bullet and embed it.
That you are new to Python shouldn't be too much of a problem if you
follow the recipe linked there. Note that the top links on that page
are broken, but if you go to one of the last links:

http://www.scipy.org/Matplotlib_figure_in_a_wx_panel

...this works. And if you need help getting it going, people can help
you. Don't worry about all the fancy graphing stuff there, the draw
method could have just been:

def draw( self ):
            """Draw data."""
            if not hasattr( self, 'subplot' ):
                self.subplot = self.figure.add_subplot( 111 )

                self.subplot.plot( [1,2,3])

and you could lose all the numpy geometry code and it would have been
a boring plot but a simpler block of code. :smiley:

Che

···

On Tue, Mar 9, 2010 at 2:23 PM, Chris Barker <Chris.Barker@...259...> wrote:

Pribadi, Krishna wrote:

Based on what I’ve been reading regarding MPL, it seems that the
matplotlib show() function causes another instance of a GUI loop to
remain suspended.

right --don't use show(), in fact, don't use pylab for the most part:

http://www.scipy.org/Cookbook/Matplotlib/EmbeddingInWx

and see the "embedding_in_wx" examples as well.

This page is badly out of date (half the links are broken)

JDH

···

On Tue, Mar 9, 2010 at 1:23 PM, Chris Barker <Chris.Barker@...259...> wrote:

Pribadi, Krishna wrote:

Based on what I’ve been reading regarding MPL, it seems that the
matplotlib show() function causes another instance of a GUI loop to
remain suspended.

right --don't use show(), in fact, don't use pylab for the most part:

http://www.scipy.org/Cookbook/Matplotlib/EmbeddingInWx

I know it's badly out of date...

I'd like to embed it but I'm not quite sure where to begin...

Do you think a simple solution like calling it from the system command line will open the plot in a new instance, so that the metadata GUI wont be hung up by the show()? I'd have to pass the selected metadata to a temporary file on disk. It's a bit of a dirty method... Thoughts?

···

-----Original Message-----
From: John Hunter [mailto:jdh2358@…287…]
Sent: Tuesday, March 09, 2010 1:40 PM
To: Chris Barker
Cc: matplotlib-users@lists.sourceforge.net
Subject: Re: [Matplotlib-users] embedding a plot function in existing wxapp GUI, problem replotting

On Tue, Mar 9, 2010 at 1:23 PM, Chris Barker <Chris.Barker@...259...> wrote:

Pribadi, Krishna wrote:

Based on what I've been reading regarding MPL, it seems that the
matplotlib show() function causes another instance of a GUI loop to
remain suspended.

right --don't use show(), in fact, don't use pylab for the most part:

http://www.scipy.org/Cookbook/Matplotlib/EmbeddingInWx

This page is badly out of date (half the links are broken)

JDH

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the intended recipient(s) only and may contain information that is
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I suggest following the embedding_is_wx*.py examples at

http://matplotlib.sourceforge.net/examples/user_interfaces/index.html

No use of pyplot or show in any of them.
JDH

···

On Tue, Mar 9, 2010 at 1:49 PM, Pribadi, Krishna <Krishna.Pribadi@...3019...> wrote:

I know it's badly out of date...

I'd like to embed it but I'm not quite sure where to begin...

Do you think a simple solution like calling it from the system command line will open the plot in a new instance, so that the metadata GUI wont be hung up by the show()? I'd have to pass the selected metadata to a temporary file on disk. It's a bit of a dirty method... Thoughts?