def combobox(element, instance: wx.ComboBox) -> wx.Object:
props = exclude(element['props'], {'value'})
# ComboBox is a textctrl and listbox linked together.
# Updating one causes events to fire for the other, so
# to avoid doubling up the events, we unhook everything,
# perform the updates, and then re-add the handlers.
instance.Unbind(wx.EVT_COMBOBOX)
instance.Unbind(wx.EVT_TEXT)
set_basic_props(instance, props)
# we blanket delete/recreate the items for now, which
# seems to be Good Enough. Child diffing could be benchmarked
# to see if it's worth the effort.
for _ in instance.GetItems():
instance.Delete(0)
instance.AppendItems(props.get('choices', []))
if 'value' in props:
instance.SetSelection(props['choices'].index(element['props'].get('value')))
if props.get('on_change'):
instance.Bind(wx.EVT_COMBOBOX, props['on_change'])
if props.get('on_input'):
instance.Bind(wx.EVT_TEXT, props['on_input'])
return instance
def crt_combobox(self, choices, size=(-1, -1), event_handler=None):
combobox = ComboBox(self, choices=choices, size=size, style=wx.CB_READONLY)
if event_handler is not None:
combobox.Bind(wx.EVT_COMBOBOX, event_handler)
return combobox