"""
ComboTreeBox provides a ComboBox that pops up a tree instead of a list.
ComboTreeBox tries to provide the same interface as ComboBox as much as
possible. However, whereas the ComboBox widget uses indices to access
items in the list of choices, ComboTreeBox uses TreeItemId's instead. If
you add an item to the ComboTreeBox (using Append or Insert), the
TreeItemId associated with the added item is returned. You can then use
that TreeItemId to add items as children of that first item. For
example:
>>> from wx.lib.combotreebox import ComboTreeBox
>>> combo = ComboTreeBox(parent)
>>> item1 = combo.Append('Item 1') # Add a root item
>>> item1a = combo.Append('Item 1a', parent=item1) # Add a child to item1
You can also add client data to each of the items like this:
>>> item1 = combo.Append('Item 1', clientData=somePythonObject)
>>> item1a = combo.Append('Item 1a', parent=item1,
... clientData=someOtherPythonObject)
And later fetch the client data like this:
>>> somePythonObject = combo.GetClientData(item1)
To get the client data of the currently selected item (if any):
>>> currentItem = combo.GetSelection()
>>> if currentItem:
>>> somePythonObject = combo.GetClientData(currentItem)
Supported styles are the same as for ComboBox, i.e. wx.CB_READONLY and
wx.CB_SORT. Provide them as usual:
>>> combo = ComboTreeBox(parent, style=wx.CB_READONLY|wx.CB_SORT)
Supported platforms: wxMSW and wxMAC natively, wxGTK by means of a
workaround.
Author: Frank Niessink <frank@niessink.com>
Copyright 2006, 2008, Frank Niessink
License: wxWidgets license
Version: 1.0
Date: May 2, 2008
"""
import wx
__all__ = ['ComboTreeBox'] # Export only the ComboTreeBox widget
# ---------------------------------------------------------------------------
class IterableTreeCtrl(wx.TreeCtrl):
"""
TreeCtrl is the same as wx.TreeCtrl, with a few convenience methods
added for easier navigation of items. """
def GetPreviousItem(self, item):
"""
GetPreviousItem(self, TreeItemId item) -> TreeItemId
Returns the item that is on the line immediately above item
(as is displayed when the tree is fully expanded). The returned
item is invalid if item is the first item in the tree.
"""
previousSibling = self.GetPrevSibling(item)
if previousSibling:
return self.GetLastChildRecursively(previousSibling)
else:
parent = self.GetItemParent(item)
if parent == self.GetRootItem() and \
(self.GetWindowStyle() & wx.TR_HIDE_ROOT):
# Return an invalid item, because the root item is hidden
return previousSibling
else:
return parent
def GetNextItem(self, item):
"""
GetNextItem(self, TreeItemId item) -> TreeItemId
Returns the item that is on the line immediately below item
(as is displayed when the tree is fully expanded). The returned
item is invalid if item is the last item in the tree.
"""
if self.ItemHasChildren(item):
firstChild, cookie = self.GetFirstChild(item)
return firstChild
else:
return self.GetNextSiblingRecursively(item)
def GetFirstItem(self):
"""
GetFirstItem(self) -> TreeItemId
Returns the very first item in the tree. This is the root item
unless the root item is hidden. In that case the first child of
the root item is returned, if any. If the tree is empty, an
invalid tree item is returned.
"""
rootItem = self.GetRootItem()
if rootItem and (self.GetWindowStyle() & wx.TR_HIDE_ROOT):
firstChild, cookie = self.GetFirstChild(rootItem)
return firstChild
else:
return rootItem
def GetLastChildRecursively(self, item):
"""
GetLastChildRecursively(self, TreeItemId item) -> TreeItemId
Returns the last child of the last child ... of item. If item
has no children, item itself is returned. So the returned item
is always valid, assuming a valid item has been passed.
"""
lastChild = item
while self.ItemHasChildren(lastChild):
lastChild = self.GetLastChild(lastChild)
return lastChild
def GetNextSiblingRecursively(self, item):
"""
GetNextSiblingRecursively(self, TreeItemId item) -> TreeItemId
Returns the next sibling of item if it has one. If item has no
next sibling the next sibling of the parent of item is returned.
If the parent has no next sibling the next sibling of the parent
of the parent is returned, etc. If none of the ancestors of item
has a next sibling, an invalid item is returned.
"""
if item == self.GetRootItem():
return wx.TreeItemId() # Return an invalid TreeItemId
nextSibling = self.GetNextSibling(item)
if nextSibling:
return nextSibling
else:
parent = self.GetItemParent(item)
return self.GetNextSiblingRecursively(parent)
def GetSelection(self):
""" Extend GetSelection to never return the root item if the
root item is hidden. """
selection = super(IterableTreeCtrl, self).GetSelection()
if selection == self.GetRootItem() and \
(self.GetWindowStyle() & wx.TR_HIDE_ROOT):
return wx.TreeItemId() # Return an invalid TreeItemId
else:
return selection
# ---------------------------------------------------------------------------
class BasePopupFrame(wx.Frame):
"""
BasePopupFrame is the base class for platform specific
versions of the PopupFrame. The PopupFrame is the frame that
is popped up by ComboTreeBox. It contains the tree of items
that the user can select one item from. Upon selection, or
when focus is lost, the frame is hidden. """
def __init__(self, parent):
super(BasePopupFrame, self).__init__(parent,
style=wx.DEFAULT_FRAME_STYLE & wx.FRAME_FLOAT_ON_PARENT &
~(wx.RESIZE_BORDER | wx.CAPTION))
self._createInterior()
self._layoutInterior()
self._bindEventHandlers()
def _createInterior(self):
self._tree = IterableTreeCtrl(self,
style=wx.TR_HIDE_ROOT|wx.TR_LINES_AT_ROOT|wx.TR_HAS_BUTTONS)
self._tree.AddRoot('Hidden root node')
def _layoutInterior(self):
frameSizer = wx.BoxSizer(wx.HORIZONTAL)
frameSizer.Add(self._tree, flag=wx.EXPAND, proportion=1)
self.SetSizerAndFit(frameSizer)
def _bindEventHandlers(self):
self._tree.Bind(wx.EVT_CHAR, self.OnChar)
self._tree.Bind(wx.EVT_TREE_ITEM_ACTIVATED, self.OnItemActivated)
self._tree.Bind(wx.EVT_LEFT_DOWN, self.OnMouseClick)
def _bindKillFocus(self):
self._tree.Bind(wx.EVT_KILL_FOCUS, self.OnKillFocus)
def _unbindKillFocus(self):
self._tree.Unbind(wx.EVT_KILL_FOCUS)
def OnKillFocus(self, event):
# We hide the frame rather than destroy it, so it can be
# popped up again later:
self.Hide()
self.GetParent().NotifyNoItemSelected()
event.Skip()
def OnChar(self, keyEvent):
if self._keyShouldHidePopup(keyEvent):
self.Hide()
self.GetParent().NotifyNoItemSelected()
keyEvent.Skip()
def _keyShouldHidePopup(self, keyEvent):
return keyEvent.GetKeyCode() == wx.WXK_ESCAPE
def OnMouseClick(self, event):
item, flags = self._tree.HitTest(event.GetPosition())
if item and (flags & wx.TREE_HITTEST_ONITEMLABEL):
self._tree.SelectItem(item)
self.Hide()
self.GetParent().NotifyItemSelected(self._tree.GetItemText(item))
else:
event.Skip()
def OnItemActivated(self, event):
item = event.GetItem()
self.Hide()
self.GetParent().NotifyItemSelected(self._tree.GetItemText(item))
def Show(self):
self._bindKillFocus()
wx.CallAfter(self._tree.SetFocus)
super(BasePopupFrame, self).Show()
def Hide(self):
self._unbindKillFocus()
super(BasePopupFrame, self).Hide()
def GetTree(self):
return self._tree
class MSWPopupFrame(BasePopupFrame):
def Show(self):
# Comply with the MS Windows Combobox behaviour: if the text in
# the text field is not in the tree, the first item in the tree
# is selected.
if not self._tree.GetSelection():
self._tree.SelectItem(self._tree.GetFirstItem())
super(MSWPopupFrame, self).Show()
class MACPopupFrame(BasePopupFrame):
def _bindKillFocus(self):
# On wxMac, the kill focus event doesn't work, but the
# deactivate event does:
self.Bind(wx.EVT_ACTIVATE, self.OnKillFocus)
def _unbindKillFocus(self):
self.Unbind(wx.EVT_ACTIVATE)
def OnKillFocus(self, event):
if not event.GetActive(): # We received a deactivate event
self.Hide()
wx.CallAfter(self.GetParent().NotifyNoItemSelected)
event.Skip()
class GTKPopupFrame(BasePopupFrame):
def _keyShouldHidePopup(self, keyEvent):
# On wxGTK, Alt-Up also closes the popup:
return super(GTKPopupFrame, self)._keyShouldHidePopup(keyEvent) or \
(keyEvent.AltDown() and keyEvent.GetKeyCode() == wx.WXK_UP)
# ---------------------------------------------------------------------------
class BaseComboTreeBox(object):
""" BaseComboTreeBox is the base class for platform specific
versions of the ComboTreeBox. """
def __init__(self, *args, **kwargs):
style = kwargs.pop('style', 0)
if style & wx.CB_READONLY:
style &= ~wx.CB_READONLY # We manage readonlyness ourselves
self._readOnly = True
else:
self._readOnly = False
if style & wx.CB_SORT:
style &= ~wx.CB_SORT # We manage sorting ourselves
self._sort = True
else:
self._sort = False
super(BaseComboTreeBox, self).__init__(style=style, *args, **kwargs)
self._createInterior()
self._layoutInterior()
self._bindEventHandlers()
# Methods to construct the widget.
def _createInterior(self):
self._popupFrame = self._createPopupFrame()
self._text = self._createTextCtrl()
self._button = self._createButton()
self._tree = self._popupFrame.GetTree()
def _createTextCtrl(self):
return self # By default, the text control is the control itself.
def _createButton(self):
return self # By default, the dropdown button is the control itself.
def _createPopupFrame(self):
# It is a subclass responsibility to provide the right PopupFrame,
# depending on platform:
raise NotImplementedError
def _layoutInterior(self):
pass # By default, there is no layout to be done.
def _bindEventHandlers(self):
for eventSource, eventType, eventHandler in self._eventsToBind():
eventSource.Bind(eventType, eventHandler)
def _eventsToBind(self):
"""
_eventsToBind(self) -> [(eventSource, eventType, eventHandler), ...]
_eventsToBind returns a list of eventSource, eventType,
eventHandlers tuples that will be bound. This method can be
extended to bind additional events. In that case, don't
forget to call _eventsToBind on the super class. """
return [(self._text, wx.EVT_KEY_DOWN, self.OnKeyDown),
(self._text, wx.EVT_TEXT, self.OnText),
(self._button, wx.EVT_BUTTON, self.OnMouseClick)]
# Event handlers
def OnMouseClick(self, event):
self.Popup()
# Note that we don't call event.Skip() to prevent popping up the
# ComboBox's own box.
def OnKeyDown(self, keyEvent):
if self._keyShouldNavigate(keyEvent):
self._navigateUpOrDown(keyEvent)
elif self._keyShouldPopUpTree(keyEvent):
self.Popup()
else:
keyEvent.Skip()
def _keyShouldPopUpTree(self, keyEvent):
return (keyEvent.AltDown() or keyEvent.MetaDown()) and \
keyEvent.GetKeyCode() == wx.WXK_DOWN
def _keyShouldNavigate(self, keyEvent):
return keyEvent.GetKeyCode() in (wx.WXK_DOWN, wx.WXK_UP) and not \
self._keyShouldPopUpTree(keyEvent)
def _navigateUpOrDown(self, keyEvent):
item = self.GetSelection()
if item:
navigationMethods = {wx.WXK_DOWN: self._tree.GetNextItem,
wx.WXK_UP: self._tree.GetPreviousItem}
getNextItem = navigationMethods[keyEvent.GetKeyCode()]
nextItem = getNextItem(item)
else:
nextItem = self._tree.GetFirstItem()
if nextItem:
self.SetSelection(nextItem)
def OnText(self, event):
event.Skip()
textValue = self._text.GetValue()
selection = self._tree.GetSelection()
if not selection or self._tree.GetItemText(selection) != textValue:
# We need to change the selection because it doesn't match the
# text just entered
item = self.FindString(textValue)
if item:
self._tree.SelectItem(item)
else:
self._tree.Unselect()
# Methods called by the PopupFrame, to let the ComboTreeBox know
# about what the user did.
def NotifyItemSelected(self, text):
""" Simulate selection of an item by the user. This is meant to
be called by the PopupFrame when the user selects an item. """
self._text.SetValue(text)
self._postComboBoxSelectedEvent(text)
self.SetFocus()
def _postComboBoxSelectedEvent(self, text):
""" Simulate a selection event. """
event = wx.CommandEvent(wx.wxEVT_COMMAND_COMBOBOX_SELECTED,
self.GetId())
event.SetString(text)
self.GetEventHandler().ProcessEvent(event)
def NotifyNoItemSelected(self):
""" This is called by the PopupFrame when the user closes the
PopupFrame, without selecting an item. """
self.SetFocus()
# Misc methods, not part of the ComboBox API.
def Popup(self):
"""
Popup(self)
Pops up the frame with the tree.
"""
comboBoxSize = self.GetSize()
x, y = self.GetParent().ClientToScreen(self.GetPosition())
y += comboBoxSize[1]
width = comboBoxSize[0]
height = 300
self._popupFrame.SetDimensions(x, y, width, height)
# On wxGTK, when the Combobox width has been increased a call
# to SetMinSize is needed to force a resize of the popupFrame:
self._popupFrame.SetMinSize((width, height))
self._popupFrame.Show()
def GetTree(self):
"""
GetTree(self) -> wx.TreeCtrl
Returns the tree control that is popped up.
"""
return self._popupFrame.GetTree()
def FindClientData(self, clientData, parent=None):
"""
FindClientData(self, PyObject clientData, TreeItemId parent=None)
-> TreeItemId
Finds the *first* item in the tree with client data equal to the
given clientData. If no such item exists, an invalid item is
returned.
"""
parent = parent or self._tree.GetRootItem()
child, cookie = self._tree.GetFirstChild(parent)
while child:
if self.GetClientData(child) == clientData:
return child
else:
result = self.FindClientData(clientData, child)
if result:
return result
child, cookie = self._tree.GetNextChild(parent, cookie)
return child
def SetClientDataSelection(self, clientData):
"""
SetClientDataSelection(self, PyObject clientData) -> bool
Selects the item with the provided clientData in the control.
Returns True if the item belonging to the clientData has been
selected, False if it wasn't found in the control.
"""
item = self.FindClientData(clientData)
if item:
self._tree.SelectItem(item)
string = self._tree.GetItemText(item)
if self._text.GetValue() != string:
self._text.SetValue(string)
return True
else:
return False
# The following methods are all part of the ComboBox API (actually
# the ControlWithItems API) and have been adapted to take TreeItemIds
# as parameter and return TreeItemIds, rather than indices.
def Append(self, itemText, parent=None, clientData=None):
"""
Append(self, String itemText, TreeItemId parent=None, PyObject
clientData=None) -> TreeItemId
Adds the itemText to the control, associating the given clientData
with the item if not None. If parent is None, itemText is added
as a root item, else itemText is added as a child item of
parent. The return value is the TreeItemId of the newly added
item. """
if parent is None:
parent = self._tree.GetRootItem()
item = self._tree.AppendItem(parent, itemText,
data=wx.TreeItemData(clientData))
if self._sort:
self._tree.SortChildren(parent)
return item
def Clear(self):
"""
Clear(self)
Removes all items from the control.
"""
return self._tree.DeleteAllItems()
def Delete(self, item):
"""
Delete(self, TreeItemId item)
Deletes the item from the control.
"""
return self._tree.Delete(item)
def FindString(self, string, parent=None):
"""
FindString(self, String string, TreeItemId parent=None) -> TreeItemId
Finds the *first* item in the tree with a label equal to the
given string. If no such item exists, an invalid item is
returned.
"""
parent = parent or self._tree.GetRootItem()
child, cookie = self._tree.GetFirstChild(parent)
while child:
if self._tree.GetItemText(child) == string:
return child
else:
result = self.FindString(string, child)
if result:
return result
child, cookie = self._tree.GetNextChild(parent, cookie)
return child
def GetSelection(self):
"""
GetSelection(self) -> TreeItemId
Returns the TreeItemId of the selected item or an invalid item
if no item is selected.
"""
selectedItem = self._tree.GetSelection()
if selectedItem and selectedItem != self._tree.GetRootItem():
return selectedItem
else:
return self.FindString(self.GetValue())
def GetString(self, item):
"""
GetString(self, TreeItemId item) -> String
Returns the label of the given item.
"""
if item:
return self._tree.GetItemText(item)
else:
return ''
def GetStringSelection(self):
"""
GetStringSelection(self) -> String
Returns the label of the selected item or an empty string if no item
is selected.
"""
return self.GetValue()
def Insert(self, itemText, previous=None, parent=None, clientData=None):
"""
Insert(self, String itemText, TreeItemId previous=None, TreeItemId
parent=None, PyObject clientData=None) -> TreeItemId
Insert an item into the control before the ``previous`` item
and/or as child of the ``parent`` item. The itemText is associated
with clientData when not None.
"""
data = wx.TreeItemData(clientData)
if parent is None:
parent = self._tree.GetRootItem()
if previous is None:
item = self._tree.InsertItemBefore(parent, 0, itemText, data=data)
else:
item = self._tree.InsertItem(parent, previous, itemText, data=data)
if self._sort:
self._tree.SortChildren(parent)
return item
def IsEmpty(self):
"""
IsEmpty(self) -> bool
Returns True if the control is empty or False if it has some items.
"""
return self.GetCount() == 0
def GetCount(self):
"""
GetCount(self) -> int
Returns the number of items in the control.
"""
# Note: We don't need to substract 1 for the hidden root item,
# because the TreeCtrl does that for us
return self._tree.GetCount()
def SetSelection(self, item):
"""
SetSelection(self, TreeItemId item)
Sets the provided item to be the selected item.
"""
self._tree.SelectItem(item)
self._text.SetValue(self._tree.GetItemText(item))
Select = SetSelection
def SetString(self, item, string):
"""
SetString(self, TreeItemId item, String string)
Sets the label for the provided item.
"""
self._tree.SetItemText(item, string)
if self._sort:
self._tree.SortChildren(self._tree.GetItemParent(item))
def SetStringSelection(self, string):
"""
SetStringSelection(self, String string) -> bool
Selects the item with the provided string in the control.
Returns True if the provided string has been selected, False if
it wasn't found in the control.
"""
item = self.FindString(string)
if item:
if self._text.GetValue() != string:
self._text.SetValue(string)
self._tree.SelectItem(item)
return True
else:
return False
def GetClientData(self, item):
"""
GetClientData(self, TreeItemId item) -> PyObject
Returns the client data associated with the given item, if any.
"""
return self._tree.GetItemPyData(item)
def SetClientData(self, item, clientData):
"""
SetClientData(self, TreeItemId item, PyObject clientData)
Associate the given client data with the provided item.
"""
self._tree.SetItemPyData(item, clientData)
def GetValue(self):
"""
GetValue(self) -> String
Returns the current value in the combobox text field.
"""
if self._text == self:
return super(BaseComboTreeBox, self).GetValue()
else:
return self._text.GetValue()
def SetValue(self, value):
"""
SetValue(self, String value)
Sets the text for the combobox text field.
NB: For a combobox with wxCB_READONLY style the string must be
in the combobox choices list, otherwise the call to SetValue()
is ignored.
"""
item = self._tree.GetSelection()
if not item or self._tree.GetItemText(item) != value:
item = self.FindString(value)
if self._readOnly and not item:
return
if self._text == self:
super(BaseComboTreeBox, self).SetValue(value)
else:
self._text.SetValue(value)
if item:
if self._tree.GetSelection() != item:
self._tree.SelectItem(item)
else:
self._tree.Unselect()
class NativeComboTreeBox(BaseComboTreeBox, wx.ComboBox):
""" NativeComboTreeBox, and any subclass, uses the native ComboBox as
basis, but prevent it from popping up its drop down list and
instead pops up a PopupFrame containing a tree of items. """
def _eventsToBind(self):
events = super(NativeComboTreeBox, self)._eventsToBind()
# Bind all mouse click events to self.OnMouseClick so we can
# intercept those events and prevent the native Combobox from
# popping up its list of choices.
for eventType in (wx.EVT_LEFT_DOWN, wx.EVT_LEFT_DCLICK,
wx.EVT_MIDDLE_DOWN, wx.EVT_MIDDLE_DCLICK,
wx.EVT_RIGHT_DOWN, wx.EVT_RIGHT_DCLICK):
events.append((self._button, eventType, self.OnMouseClick))
if self._readOnly:
events.append((self, wx.EVT_CHAR, self.OnChar))
return events
def OnChar(self, event):
# OnChar is only called when in read only mode. We don't call
# event.Skip() on purpose, to prevent the characters from being
# displayed in the text field.
pass
class MSWComboTreeBox(NativeComboTreeBox):
""" MSWComboTreeBox adds one piece of functionality as compared to
NativeComboTreeBox: when the user browses through the tree, the
ComboTreeBox's text field is continuously updated to show the
currently selected item in the tree. If the user cancels
selecting a new item from the tree, e.g. by hitting escape, the
previous value (the one that was selected before the PopupFrame
was popped up) is restored. """
def _createPopupFrame(self):
return MSWPopupFrame(self)
def _eventsToBind(self):
events = super(MSWComboTreeBox, self)._eventsToBind()
events.append((self._tree, wx.EVT_TREE_SEL_CHANGED,
self.OnSelectionChangedInTree))
return events
def OnSelectionChangedInTree(self, event):
if self.IsBeingDeleted():
return
item = event.GetItem()
if item:
selectedValue = self._tree.GetItemText(item)
if self.GetValue() != selectedValue:
self.SetValue(selectedValue)
event.Skip()
def _keyShouldPopUpTree(self, keyEvent):
return super(MSWComboTreeBox, self)._keyShouldPopUpTree(keyEvent) or \
(keyEvent.GetKeyCode() == wx.WXK_F4 and not keyEvent.HasModifiers()) or \
((keyEvent.AltDown() or keyEvent.MetaDown()) and \
keyEvent.GetKeyCode() == wx.WXK_UP)
def SetValue(self, value):
""" Extend SetValue to also select the text in the
ComboTreeBox's text field. """
super(MSWComboTreeBox, self).SetValue(value)
# We select the text in the ComboTreeBox's text field.
# There is a slight complication, however. When the control is
# deleted, SetValue is called. But if we call SetMark at that
# time, wxPython will crash. We can prevent this by comparing the
# result of GetLastPosition and the length of the value. If they
# match, all is fine. If they don't match, we don't call SetMark.
if self._text.GetLastPosition() == len(value):
self._text.SetMark(0, self._text.GetLastPosition())
def Popup(self, *args, **kwargs):
""" Extend Popup to store a copy of the current value, so we can
restore it later (in NotifyNoItemSelected). This is necessary
because MSWComboTreeBox will change the value as the user
browses through the items in the popped up tree. """
self._previousValue = self.GetValue()
super(MSWComboTreeBox, self).Popup(*args, **kwargs)
def NotifyNoItemSelected(self, *args, **kwargs):
""" Restore the value copied previously, because the user has
not selected a new value. """
self.SetValue(self._previousValue)
super(MSWComboTreeBox, self).NotifyNoItemSelected(*args, **kwargs)
class MACComboTreeBox(NativeComboTreeBox):
def _createPopupFrame(self):
return MACPopupFrame(self)
def _createButton(self):
return self.GetChildren()[0] # The choice button
def _keyShouldNavigate(self, keyEvent):
return False # No navigation with up and down on wxMac
def _keyShouldPopUpTree(self, keyEvent):
return super(MACComboTreeBox, self)._keyShouldPopUpTree(keyEvent) or \
keyEvent.GetKeyCode() == wx.WXK_DOWN
class GTKComboTreeBox(BaseComboTreeBox, wx.Panel):
""" The ComboTreeBox widget for wxGTK. This is actually a work
around because on wxGTK, there doesn't seem to be a way to intercept
mouse events sent to the Combobox. Intercepting those events is
necessary to prevent the Combobox from popping up the list and pop up
the tree instead. So, until wxPython makes intercepting those events
possible we build a poor man's Combobox ourselves using a TextCtrl and
a BitmapButton. """
def _createPopupFrame(self):
return GTKPopupFrame(self)
def _createTextCtrl(self):
if self._readOnly:
style = wx.TE_READONLY
else:
style = 0
return wx.TextCtrl(self, style=style)
def _createButton(self):
bitmap = wx.ArtProvider.GetBitmap(wx.ART_GO_DOWN, client=wx.ART_BUTTON)
return wx.BitmapButton(self, bitmap=bitmap)
def _layoutInterior(self):
panelSizer = wx.BoxSizer(wx.HORIZONTAL)
panelSizer.Add(self._text, flag=wx.EXPAND, proportion=1)
panelSizer.Add(self._button)
self.SetSizerAndFit(panelSizer)
# ---------------------------------------------------------------------------
def ComboTreeBox(*args, **kwargs):
""" Factory function to create the right ComboTreeBox depending on
platform. You may force a specific class, e.g. for testing
purposes, by setting the keyword argument 'platform', e.g.
'platform=GTK' or 'platform=MSW' or platform='MAC'. """
platform = kwargs.pop('platform', None) or wx.PlatformInfo[0][4:7]
ComboTreeBoxClassName = '%sComboTreeBox' % platform
ComboTreeBoxClass = globals()[ComboTreeBoxClassName]
return ComboTreeBoxClass(*args, **kwargs)
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