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