[wxPython-users] using wxpython with non-GUI applications

[Chris Barker]

Mike Burnett wrote:
> I have python code that runs in a non-GUI environment (i.e., command =

> line) for doing complex computations. I would like to display the =

> periodic results of the computations graphically.  Wxpython includes the =

> graphical tools I need to display the results, but it is designed for =

> event driven windows applications.  Can wxpython be used for my minimal =

> graphics needs,

It may not be ideal, but it's quite usable. You can either:

- if you don't  mind the GUI freezing when your code is computing, just =

run it form an event
- put all the computation in another thread
- you can do a simple procedural wx app my initializing a wx.App, then =

bringing up modal dialogs sequentially (modal dialogs have their own =

event loop). You can bring up custom dialogs that have just about =

anything in them. See the enclosed sample.

-Chris


-- =

Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
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Chris.Barker at noaa.gov
-------------- next part --------------
#!/usr/bin/env pythonw2.4

"""

This is a little script that tried to demonstrate a simple "procedural"
program using wxPython. tHe goal is to have a script that runs through a
few questions for the user, poppin up dialogs as it goes, but wittout a
main frame, and all the baggage that usually comes with writing a full,
event drive app.

"""

import wx

from sys import exit

## Here's an example of a custom dialog with no parent
class MyCheckDialog(wx.Dialog):
    def __init__(self, Choices):
        wx.Dialog.__init__(self, None, -1, 'wxDialog')
        self.Choices =3D Choices =


        self.clb =3D wx.CheckListBox(self, -1, wx.DefaultPosition, wx.Defau=
ltSize, self.Choices)

        ok =3D wx.Button(self, wx.ID_OK, 'Ok')
        =

        sizer =3D wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.clb, 1, wx.EXPAND|wx.ALL, 5)
        sizer.Add(ok, 0, wx.ALIGN_RIGHT|wx.ALL^wx.TOP, 5)
        self.SetSizer(sizer)
        #self.Fit()
        =

        self.Center() # make it come up on the center of the screen

    def GetChecked(self):
        Checked =3D []
        for (index, item) in enumerate(self.Choices):
            if self.clb.IsChecked(index):
                Checked.append(item)
        return Checked

# You could put some code here, to run before initializing wx.

# you need to start by initializing a wxApp
app =3D wx.App(False)


## now you can run your script, bringing  up various dialogs.

fd =3D wx.FileDialog(None,"Pick a File")
if fd.ShowModal() !=3D wx.ID_OK:
    exit(1)
else:
    print "You choose the file: ", fd.GetFilename()

md =3D wx.MessageDialog(None, 'Continue?')
if md.ShowModal() !=3D wx.ID_OK:
    exit(1)
else:
    print "You chose to continue"

scd =3D wx.SingleChoiceDialog(None, 'Pick One',
                            'A Single Choice Dialog',
                            ['single', 'choice', 'dialog','with','some','ch=
oices'])
if scd.ShowModal() !=3D wx.ID_OK:
    exit(1)
else:
    print "You chose:", scd.GetStringSelection()

# now lets get some input on the command line:
I =3D raw_input("type something here >>")
print "You typed:", I


myd =3D MyCheckDialog(['check', 'list', 'box', 'another'])
if myd.ShowModal() !=3D wx.ID_OK:
    exit(1)
else:
    print "You checked:", myd.GetChecked()