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# (C) Copyright 2005-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
""" The Wx-specific implementation of the combo field class """
import wx
from traits.api import provides
from pyface.fields.i_combo_field import IComboField, MComboField
from .editable_field import EditableField
@provides(IComboField)
class ComboField(MComboField, EditableField):
""" The Wx-specific implementation of the combo field class """
# ------------------------------------------------------------------------
# IWidget interface
# ------------------------------------------------------------------------
def _create_control(self, parent):
""" Create the toolkit-specific control that represents the widget. """
control = wx.Choice(parent, -1)
return control
# ------------------------------------------------------------------------
# Private interface
# ------------------------------------------------------------------------
def _update_value(self, event):
""" Handle a change to the value from user interaction
"""
# do normal focus event stuff
if isinstance(event, wx.FocusEvent):
event.Skip()
if self.control is not None:
self.value = self.values[event.GetInt()]
# Toolkit control interface ---------------------------------------------
def _get_control_value(self):
""" Toolkit specific method to get the control's value. """
index = self.control.GetSelection()
if index != -1:
return self.values[index]
else:
raise IndexError("no value selected")
def _get_control_text(self):
""" Toolkit specific method to get the control's text content. """
index = self.control.GetSelection()
if index != -1:
return self.control.GetString(index)
else:
raise IndexError("no value selected")
def _set_control_value(self, value):
""" Toolkit specific method to set the control's value. """
index = self.values.index(value)
self.control.SetSelection(index)
event = wx.CommandEvent(wx.EVT_CHOICE.typeId, self.control.GetId())
event.SetInt(index)
wx.PostEvent(self.control.GetEventHandler(), event)
def _observe_control_value(self, remove=False):
""" Toolkit specific method to change the control value observer. """
if remove:
self.control.Unbind(wx.EVT_CHOICE, handler=self._update_value)
else:
self.control.Bind(wx.EVT_CHOICE, self._update_value)
def _get_control_text_values(self):
""" Toolkit specific method to get the control's text values. """
values = []
for i in range(self.control.GetCount()):
values.append(self.control.GetString(i))
return values
def _set_control_values(self, values):
""" Toolkit specific method to set the control's values. """
current_value = self.value
self.control.Clear()
for i, value in enumerate(values):
item = self.formatter(value)
if isinstance(item, tuple):
image, text = item
else:
text = item
self.control.Insert(text, i, value)
if current_value in values:
self._set_control_value(current_value)
else:
self._set_control_value(self.value)
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