controls/TextCtrlAutoComplete.py
author usveticic
Wed, 16 Sep 2020 09:41:52 +0200
branchsvghmi
changeset 3056 827bf284feec
parent 2431 6923074540dd
child 3303 0ffb41625592
permissions -rw-r--r--
Button, ToggleButton and slider updated. Error to warning when building

Button fixed so it doesn't release until it gets feedback from plc

Toggle button changed so it makes changes instantly. There was too big delay if we waited for feedback.

Slider added new features need some changes for final version.
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# This file is part of Beremiz, a Integrated Development Environment for
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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
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#
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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
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#
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# See COPYING file for copyrights details.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
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from __future__ import absolute_import
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from six.moves import cPickle
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import wx
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MAX_ITEM_COUNT = 10
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MAX_ITEM_SHOWN = 6
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if wx.Platform == '__WXMSW__':
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    LISTBOX_BORDER_HEIGHT = 2
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    LISTBOX_INTERVAL_HEIGHT = 0
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else:
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    LISTBOX_BORDER_HEIGHT = 4
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    LISTBOX_INTERVAL_HEIGHT = 6
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class PopupWithListbox(wx.PopupWindow):
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    def __init__(self, parent, choices=None):
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        wx.PopupWindow.__init__(self, parent, wx.BORDER_SIMPLE)
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        self.ListBox = wx.ListBox(self, -1, style=wx.LB_HSCROLL | wx.LB_SINGLE | wx.LB_SORT)
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        choices = [] if choices is None else choices
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        self.SetChoices(choices)
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        self.ListBox.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
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        self.ListBox.Bind(wx.EVT_MOTION, self.OnMotion)
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    def SetChoices(self, choices):
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        max_text_width = 0
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        max_text_height = 0
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        self.ListBox.Clear()
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        for choice in choices:
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            self.ListBox.Append(choice)
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            w, h = self.ListBox.GetTextExtent(choice)
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            max_text_width = max(max_text_width, w)
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            max_text_height = max(max_text_height, h)
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        itemcount = min(len(choices), MAX_ITEM_SHOWN)
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        width = self.Parent.GetSize()[0]
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        height = \
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            max_text_height * itemcount + \
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            LISTBOX_INTERVAL_HEIGHT * max(0, itemcount - 1) + \
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            2 * LISTBOX_BORDER_HEIGHT
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        if max_text_width + 10 > width:
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            height += 15
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        size = wx.Size(width, height)
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        if wx.Platform == '__WXMSW__':
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            size.width -= 2
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        self.ListBox.SetSize(size)
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        self.SetClientSize(size)
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    def MoveSelection(self, direction):
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        selected = self.ListBox.GetSelection()
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        if selected == wx.NOT_FOUND:
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            if direction >= 0:
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                selected = 0
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            else:
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                selected = self.ListBox.GetCount() - 1
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        else:
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            selected = (selected + direction) % (self.ListBox.GetCount() + 1)
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        if selected == self.ListBox.GetCount():
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            selected = wx.NOT_FOUND
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        self.ListBox.SetSelection(selected)
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    def GetSelection(self):
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        return self.ListBox.GetStringSelection()
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    def OnLeftDown(self, event):
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        selected = self.ListBox.HitTest(wx.Point(event.GetX(), event.GetY()))
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        parent_size = self.Parent.GetSize()
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        parent_rect = wx.Rect(0, -parent_size[1], parent_size[0], parent_size[1])
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        if selected != wx.NOT_FOUND:
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            wx.CallAfter(self.Parent.SetValueFromSelected, self.ListBox.GetString(selected))
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        elif parent_rect.InsideXY(event.GetX(), event.GetY()):
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            result, x, y = self.Parent.HitTest(wx.Point(event.GetX(), event.GetY() + parent_size[1]))
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            if result != wx.TE_HT_UNKNOWN:
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                self.Parent.SetInsertionPoint(self.Parent.XYToPosition(x, y))
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        else:
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            wx.CallAfter(self.Parent.DismissListBox)
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        event.Skip()
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    def OnMotion(self, event):
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        self.ListBox.SetSelection(
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            self.ListBox.HitTest(wx.Point(event.GetX(), event.GetY())))
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        event.Skip()
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class TextCtrlAutoComplete(wx.TextCtrl):
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    def __init__(self, parent, choices=None, dropDownClick=True,
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                 element_path=None, **therest):
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        """
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        Constructor works just like wx.TextCtrl except you can pass in a
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        list of choices.  You can also change the choice list at any time
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        by calling setChoices.
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        """
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        therest['style'] = wx.TE_PROCESS_ENTER | therest.get('style', 0)
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        wx.TextCtrl.__init__(self, parent, **therest)
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        # Some variables
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        self._dropDownClick = dropDownClick
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        self._lastinsertionpoint = None
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        self._hasfocus = False
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        self._screenheight = wx.SystemSettings.GetMetric(wx.SYS_SCREEN_Y)
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        self.element_path = element_path
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        self.listbox = None
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        self.SetChoices(choices)
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        # gp = self
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        # while ( gp != None ) :
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        #    gp.Bind ( wx.EVT_MOVE , self.onControlChanged, gp )
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        #    gp.Bind ( wx.EVT_SIZE , self.onControlChanged, gp )
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        #    gp = gp.GetParent()
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        self.Bind(wx.EVT_KILL_FOCUS, self.OnControlChanged)
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        self.Bind(wx.EVT_TEXT_ENTER, self.OnControlChanged)
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        self.Bind(wx.EVT_TEXT, self.OnEnteredText)
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        self.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)
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        # If need drop down on left click
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        if dropDownClick:
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            self.Bind(wx.EVT_LEFT_DOWN, self.OnClickToggleDown)
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            self.Bind(wx.EVT_LEFT_UP, self.OnClickToggleUp)
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    def ChangeValue(self, value):
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        wx.TextCtrl.ChangeValue(self, value)
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        self.RefreshListBoxChoices()
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    def OnEnteredText(self, event):
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        wx.CallAfter(self.RefreshListBoxChoices)
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        event.Skip()
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    def OnKeyDown(self, event):
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        """ Do some work when the user press on the keys:
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            up and down: move the cursor
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        """
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        keycode = event.GetKeyCode()
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        if keycode in [wx.WXK_DOWN, wx.WXK_UP]:
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            self.PopupListBox()
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            if keycode == wx.WXK_DOWN:
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                self.listbox.MoveSelection(1)
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            else:
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                self.listbox.MoveSelection(-1)
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        elif keycode in [wx.WXK_LEFT, wx.WXK_RIGHT, wx.WXK_RETURN] and self.listbox is not None:
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            selected = self.listbox.GetSelection()
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            if selected != "":
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                self.SetValueFromSelected(selected)
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            else:
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                event.Skip()
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        elif event.GetKeyCode() == wx.WXK_ESCAPE:
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            self.DismissListBox()
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        else:
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            event.Skip()
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    def OnClickToggleDown(self, event):
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        self._lastinsertionpoint = self.GetInsertionPoint()
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        event.Skip()
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    def OnClickToggleUp(self, event):
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        if not self._hasfocus:
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            self._hasfocus = True
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        elif self.GetInsertionPoint() == self._lastinsertionpoint:
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            wx.CallAfter(self.PopupListBox)
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        self._lastinsertionpoint = None
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        event.Skip()
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    def OnControlChanged(self, event):
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        res = self.GetValue()
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        config = wx.ConfigBase.Get()
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        listentries = cPickle.loads(str(config.Read(self.element_path, cPickle.dumps([]))))
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        if res and res not in listentries:
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            listentries = (listentries + [res])[-MAX_ITEM_COUNT:]
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            config.Write(self.element_path, cPickle.dumps(listentries))
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            config.Flush()
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            self.SetChoices(listentries)
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        self.DismissListBox()
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        self._hasfocus = False
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        event.Skip()
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    def SetChoices(self, choices):
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        self._choices = choices
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        self.RefreshListBoxChoices()
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    def GetChoices(self):
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        return self._choices
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    def SetValueFromSelected(self, selected):
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        """
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        Sets the wx.TextCtrl value from the selected wx.ListCtrl item.
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        Will do nothing if no item is selected in the wx.ListCtrl.
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        """
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        if selected != "":
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            self.SetValue(selected)
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        self.DismissListBox()
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    def RefreshListBoxChoices(self):
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        if self.listbox is not None:
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            text = self.GetValue()
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            choices = [choice for choice in self._choices if choice.startswith(text)]
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            self.listbox.SetChoices(choices)
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    def PopupListBox(self):
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        if self.listbox is None:
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            self.listbox = PopupWithListbox(self)
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            # Show the popup right below or above the button
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            # depending on available screen space...
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            pos = self.ClientToScreen((0, 0))
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            sz = self.GetSize()
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            if wx.Platform == '__WXMSW__':
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                pos.x -= 2
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                pos.y -= 2
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            self.listbox.Position(pos, (0, sz[1]))
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            self.RefreshListBoxChoices()
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            self.listbox.Show()
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    def DismissListBox(self):
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        if self.listbox is not None:
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            if self.listbox.ListBox.HasCapture():
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                self.listbox.ListBox.ReleaseMouse()
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            self.listbox.Destroy()
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            self.listbox = None