I'm working on a GUI and I'd like to create a variable number of buttons, depending on what is input by user. How should I go about this?
More precisely, the user opens a data file with a number of datasets, N. I would like to create N buttons with the ith button having the name of the ith dataset.
Something like... (conceptually, obviously this won't work)
import wx
# create sizer
hbox1=wx.GridBagSizer(4,4)
# create file button and add to sizer
fbtn = wx.Button(dv, label=file)
hbox1.Add(fbtn, pos=(jf,0))
# read file to get dataset names
dsetnames=[<dataset names for file>]
# create bottons for datasets found in file
jd=0 # datasets
for ds in dsetnames:
self.dbtn<jd> = wx.Button(dv, label=ds)
hbox1.Add(self.dbtn<jd>, pos=(jd,1))
jd+=1
Thank you.
I found a solution but I don't have the privilege yet to answer questions, so I'll add it here. Generally, the solution here is to create a dictionary with the object names as the keys and the objects as the values.
import wx
dv=wx.Panel(self)
# create sizer
hbox1=wx.GridBagSizer(4,4)
# create file button and add to sizer
# filename file input by user
fbtn = wx.Button(dv, label=file)
hbox1.Add(fbtn, pos=(jf,0))
# read file to get dataset names
dsetnames=[<dataset names for file>]
# create empty dictionary for objects
self.dbtn=dict()
# create bottons for datasets found in file
jd=0 # datasets
for ds in dsetnames:
objname=ds
self.dbtn.update({objname:wx.Button(dv, label=ds)}) # update dictionary with individual objects
hbox1.Add(self.dbtn[objname], pos=(jd,1))
jd+=1
I believe the following may be related.
I prefer using a list so that the items read from the file are in the correct order. Dictionaries do not have a standard order, although you could use an OrderedDict from the collections library. Anyway, here's an approach that uses a list:
import wx
########################################################################
class MyPanel(wx.Panel):
""""""
#----------------------------------------------------------------------
def __init__(self, parent):
"""Constructor"""
wx.Panel.__init__(self, parent)
btn_list = self.getButtons()
btn_sizer = wx.BoxSizer(wx.VERTICAL)
for index, btn in enumerate(btn_list):
name = "button%i" % index
b = wx.Button(self, label=btn, name=name)
b.Bind(wx.EVT_BUTTON, self.onButton)
btn_sizer.Add(b, 0, wx.ALL|wx.CENTER, 5)
self.SetSizer(btn_sizer)
#----------------------------------------------------------------------
def getButtons(self):
"""
Here you would put code to get a list of button labels from a file
"""
return ["alpha", "bravo", "charlie"]
#----------------------------------------------------------------------
def onButton(self, event):
""""""
btn = event.GetEventObject()
print "The button's label is '%s'" % btn.GetLabel()
print "The button's name is '%s'" % btn.GetName()
########################################################################
class MyFrame(wx.Frame):
""""""
#----------------------------------------------------------------------
def __init__(self):
"""Constructor"""
wx.Frame.__init__(self, None, title="Buttons")
panel = MyPanel(self)
self.Show()
if __name__ == "__main__":
app = wx.App(False)
frame = MyFrame()
app.MainLoop()
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