I have a collection of panels that create and immediately disable. I enable them after the user has done some interaction. However if I disable the panels before the app.MainLoop(), later when I enable them, TAB_TRAVERSAL doesn’t work.
I have a test case that shows the failure. A limitation is that I’m working on legacy code using linux python 2.7.8 and wx 3.0.2 (yes, I know) and can’t upgrade in the short term.
Am I missing some step that I should be doing after I re-enable the panel to get that panel back in the TAB_TRAVERSAL list?
In example code below, if the call to frame.on_button_toggle() is left where it is right before app.MainLoop(), then pushing the toggle state button will make tab traversal not include the originally disabled objects.
If it’s a feature, what event can I trigger on to disable the panels before the user has a chance to interact, but after app.MainLoop() ?
Thanks for any suggestions!
import wx
class TCPanel(wx.Panel):
"""A panel with 2 textctrl's"""
counter = 0
def __init__(self, parent, *args, **kwargs):
super(TCPanel, self).__init__(parent, *args, **kwargs)
gbs = wx.GridBagSizer(vgap=2, hgap=4)
self.tcx = wx.TextCtrl(self, name="tcx", value=str(TCPanel.counter))
TCPanel.counter += 1
self.tcy = wx.TextCtrl(self, name="tcy", value=str(TCPanel.counter))
TCPanel.counter += 1
gbs.Add(self.tcx, (0, 0))
gbs.Add(self.tcy, (0, 1))
self.SetSizer(gbs)
self.Layout()
class MainWindow(wx.Frame):
""" Test window to hold a TCPanel """
def __init__(self, parent, title, num_panels=5, slice_size=2):
super(MainWindow, self).__init__(parent, title=title)
self.slice = slice_size
sizer = wx.BoxSizer(wx.VERTICAL)
self.state = True
self.plist = []
for i in range(num_panels):
p = TCPanel(self, style=wx.TAB_TRAVERSAL)
sizer.Add(p, 0, 0, 0)
self.plist += [p]
btn = wx.Button(self, label="toggle state")
sizer.Add(btn, 0, flag=wx.ALL, border=10)
btn.Bind(wx.EVT_BUTTON, self.on_button_toggle)
self.SetSizer(sizer)
self.SetClientSize(self.GetBestSize())
self.Show()
# breaks if self.state is set to False and windows are disabled before app.MainLoop()
# self.on_button_toggle(None)
def on_button_toggle(self, event=None):
"""toggle some panels between enable and disable
If panels are disabled before app.MainLoop(), can't get traversal to work again."""
self.state = not self.state
for p in self.plist[::self.slice]:
p.Enable(self.state)
app = wx.App(False)
frame = MainWindow(None, 'Test', num_panels=6, slice_size=2)
frame.Show(True)
# uncomment on_button_toggle() to make traversal not work after pushing button to enable all
# comment and it will work
frame.on_button_toggle()
app.MainLoop()