annotate orpg/tools/predTextCtrl.py @ 143:dc74dca250d1 alpha

Traipse Alpha 'OpenRPG' {091123-02} Traipse is a distribution of OpenRPG that is designed to be easy to setup and go. Traipse also makes it easy for developers to work on code without fear of sacrifice. 'Ornery-Orc' continues the trend of 'Grumpy' and adds fixes to the code. 'Ornery-Orc's main goal is to offer more advanced features and enhance the productivity of the user. Update Summary (Cleaning up for Beta) Added Bookmarks Fix to Remote Admin Commands Minor fix to text based Server Fix to Pretty Print, from Core Fix to Splitter Nodes not being created Fix to massive amounts of images loading, from Core Added 'boot' command to remote admin Added confirmation window for sent nodes Minor changes to allow for portability to an OpenSUSE linux OS Miniatures Layer pop up box allows users to turn off Mini labels, from FlexiRPG Zoom Mouse plugin added Images added to Plugin UI Switching to Element Tree Map efficiency, from FlexiRPG Added Status Bar to Update Manager default_manifest.xml renamed to default_upmana.xml Cleaner clode for saved repositories New TrueDebug Class in orpg_log (See documentation for usage) Mercurial's hgweb folder is ported to upmana Pretty important update that can help remove thousands of dead children from your gametree. Children, <forms />, <group_atts />, <horizontal />, <cols />, <rows />, <height />, etc... are all tags now. Check your gametree and look for dead children!! New Gametree Recursion method, mapping, and context sensitivity. !Infinite Loops return error instead of freezing the software! New Syntax added for custom PC sheets Tip of the Day added, from Core and community Fixed Whiteboard ID to prevent random line or text deleting. Modified ID's to prevent non updated clients from ruining the fix.
author sirebral
date Mon, 23 Nov 2009 19:52:56 -0600
parents 0f720618a8bd
children 5c9a118476b2
rev   line source
0
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1 # Copyright (C) 2001 The OpenRPG Project
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2 #
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3 # openrpg-dev@lists.sourceforge.net
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4 #
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5 # This program is free software; you can redistribute it and/or modify
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6 # it under the terms of the GNU General Public License as published by
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7 # the Free Software Foundation; either version 2 of the License, or
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8 # (at your option) any later version.
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9 #
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10 # This program is distributed in the hope that it will be useful,
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11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 # GNU General Public License for more details.
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14 #
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15 # You should have received a copy of the GNU General Public License
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16 # along with this program; if not, write to the Free Software
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17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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18 # --
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19 #
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20 # File: predTextCtrl.py
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21 # Author: Andrew Bennett
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22 # Maintainer: Andrew Bennett
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23 # Version: $id:$
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24 #
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25 # Description: This file contains an extension to the wxPython wx.TextCtrl that provides predictive word completion
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26 # based on a word file loaded at instantiation. Also, it learns new words as you type, dynamically
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27 # adjusting a weight for each word based on how often you type it.
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28 #
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29
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30 ##
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31 ## Module Loading
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32 ##
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33
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34 import string
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35 from orpg.orpg_windows import *
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0f720618a8bd Traipse Alpha 'OpenRPG' {091002-01}
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36 import wx #wx.SystemSettings.GetMetric(wx.SYS_VSCROLL_X)
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37 from wx.lib.expando import ExpandoTextCtrl
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38 from orpg.tools.orpg_log import logger, debug
0
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39
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40 # This line added to test CVS commit
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41
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42 ##
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43 ## Class Definitions
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44 ##
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45
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46 # This class implements a tree node that represents a letter
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47 #
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48 # Defines:
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49 # __init__(self,filename)
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50 #
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51 class Letter:
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52 def __init__(self,asciiCharIn,parentNodeIn):
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53 self.asciiChar = asciiCharIn # should be an ASCII char
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54 self.parentNode = parentNodeIn # should be ref to a class Letter
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55 self.priority = 0 # should be an int
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56 self.mostCommon = self # should be a ref to a class Letter
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57 self.children = {} # should be a ref to a dictionary of class Letter
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58
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59 def __str__(self):
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60 return self.asciiChar
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61
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62
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63 # This class implements the tree structure to hold the words
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64 #
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65 # Defines:
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66 # __init__(self,filename)
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67 # updateMostCommon(self,target)
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68 # setWord(self,wordText,priority,sumFlag)
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69 # addWord(self,wordText)
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70 # setWord(self,wordText)
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71 # setWordPriority(self,wordText,priority)
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72 # findWordNode(self,wordText) returns class Letter
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73 # findWordPriority(self,wordText) returns int
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74 # getPredition(self,k,cur) returns string
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75 class LetterTreeClass(object):
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76
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77 # Initialization subroutine.
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78 #
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79 # self : instance of self
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80 # filename : name of word file to use
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81 #
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82 # returns None
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83 #
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84 # Purpose: Constructor for LetterTree. Basically, it initializes itself with a word file, if present.
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85 def __init__(self, singletonKey):
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86 if not isinstance(singletonKey, _SingletonKey):
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87 raise invalid_argument(_("Use LetterTree() to get access to singleton"))
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88
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89 self.rootNode = Letter("",None) # rootNode is a class Letter
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90 self.rootNode.children = {} # initialize the children list
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91
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92
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93 # updateMostCommon subroutine.
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94 #
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95 # self : instance of self
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96 # target : class Letter that was updated
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97 #
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98 # Returns None
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99 #
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100 # Purpose: Updates all of the parent nodes of the target, such that their mostCommon member
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101 # points to the proper class Letter, based on the newly updated priorities.
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102 def updateMostCommon(self, target):
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103 # cur is a class Letter
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104 prev = target.parentNode # prev is a class Letter
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105 while prev:
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106 if prev.mostCommon is None:
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107 prev.mostCommon = target
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108 else:
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109 if target.priority > prev.mostCommon.priority:
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110 prev.mostCommon = target
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111 prev = prev.parentNode
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112
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113
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114
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115 # setWord subroutine.
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116 #
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117 # self : instance of self
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118 # wordText : string representing word to add
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119 # priority : integer priority to set the word
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120 # sumFlag : if True, add the priority to the existing, else assign the priority
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121 #
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122 # Returns: None
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123 #
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124 # Purpose: Sets or increments the priority of a word, adding the word if necessary
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125 def setWord(self,wordText,priority = 1,sumFlag = 0):
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126 cur = self.rootNode # start from the root
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127 for ch in wordText: # for each character in the word
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128 if cur.children.has_key(ch): # check to see if we've found a new word
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129 cur = cur.children[ch] # if we haven't found a new word, move to the next letter and try again
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130 else: # in this clause, we're creating a new branch, as the word is new
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131 newLetter = Letter(ch,cur) # create a new class Letter using this ascii code and the current letter as a parent
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132 if cur is self.rootNode: # special case: Others expect the top level letters to point to None, not self.rootNode
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133 newLetter.parentNode = None
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134 cur.children[ch] = newLetter # add the new letter to the list of children of the current letter
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135 cur = newLetter # make the new letter the current one for the next time through
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136
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137 # at this point, cur is pointing to the last letter of either a new or existing word.
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138 if sumFlag: cur.priority += priority # if the caller wants to add to the existing (0 if new)
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139 else: cur.priority = priority # else, the set the priority directly
0
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140 self.updateMostCommon(cur) # this will run back through the tree to fix up the mostCommon members
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141
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142 # addWord subroutine.
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143 #
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144 # self : instance of self
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145 # wordText : string representing word to add
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146 #
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147 # Returns: None
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148 #
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149 # Purpose: Convenience method that wraps setWord. Used to add words known not to exist.
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150 def addWord(self,wordText):
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151 self.setWord(wordText,priority = 1)
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152
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153 # incWord subroutine.
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154 #
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155 # self : instance of self
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156 # wordText : string representing word to add
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157 #
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158 # Returns: None
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159 #
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160 # Purpose: Convenience method that wraps setWord. Used to increment the priority of existing words and add new words.
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161 # Note: Generally, this method can be used instead of addWord.
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162
0
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163 def incWord(self,wordText):
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164 self.setWord(wordText,priority = 1, sumFlag = 1)
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165
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166 # setWordPriority subroutine.
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167 #
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168 # self : instance of self
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169 # wordText : string representing word to add
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170 # priority: int that is the new priority
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171 #
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172 # Returns: None
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173 #
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174 # Purpose: Convenience method that wraps setWord. Sets existing words to priority or adds new words with priority = priority
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175
0
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176 def setWordPriority(self,wordText,priority):
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177 self.setWord(wordText,priority = priority)
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178
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179
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180 # findWordNode subroutine.
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181 #
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182 # self : instance of self
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183 # wordText : string representing word to add
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184 #
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185 # Returns: class Letter or None if word isn't found.
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186 #
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187 # Purpose: Given a word, it returns the class Letter node that corresponds to the word. Used mostly in prep for a call to
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188 # getPrediction()
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189
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190 def findWordNode(self,wordText): #returns class Letter that represents the last letter in the word
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191 cur = self.rootNode # start at the root
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192 for ch in wordText: # move through each letter in the word
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193 if cur.children.has_key(ch): # if the next letter exists, make cur equal that letter and loop
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194 cur = cur.children[ch]
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195 else: return None # return None if letter not found
0
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196 return cur # return cur, as this points to the last letter if we got this far
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197
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198
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199 # findWordPriority subroutine.
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200 #
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201 # self : instance of self
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202 # wordText : string representing word to add
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203 #
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204 # Returns: Int representing the word's priority or 0 if not found.
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205 #
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206 # Purpose: Returns the priority of the given word
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207
0
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208 def findWordPriority(self,wordText):
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209
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210 cur = self.findWordNode(wordText) # find the class Letter node that corresponds to this word
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211 if cur: return cur.priority # if it was found, return it's priority
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212 else: return 0 # else, return 0, meaning word not found
0
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213
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214 def printTree(self, current=None):
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215 letters = []
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216 if current is None:
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217 current = self.rootNode
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218 for l, letter in current.children.iteritems():
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219 letters.append(str(letter))
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220 if letter.children != {}:
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221 m = self.printTree(letter)
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222 letters.append(m)
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223 return letters
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224
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225 # getPrediction subroutine.
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226 #
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227 # self : instance of self
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228 # k : ASCII char that was typed
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229 # cur : class Letter that points to the current node in LetterTree
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230 #
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231 # Returns: The predicted text or "" if none found
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232 #
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233 # Purpose: This is the meat and potatoes of data structure. It takes the "current" Letter node and the next key typed
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234 # and returns it's guess of the rest of the word, based on the highest priority letter in the rest of the branch.
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235 def getPrediction(self,k,cur):
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236
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237 if cur.children.has_key(k) : # check to see if the key typed is a sub branch
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238 # If so, make a prediction. Otherwise, do the else at the bottom of
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239 # the method (see below).
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240
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241 cur = cur.children[k] # set the cur to the typed key's class Letter in the sub-branch
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242
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243 backtrace = cur.mostCommon # backtrace is a class Letter. It's used as a placeholder to back trace
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244 # from the last letter of the mostCommon word in the
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245 # sub-tree up through the tree until we meet ourself at cur. We'll
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246 # build the guess text this way
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247
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248 returnText = "" # returnText is a string. This will act as a buffer to hold the string
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249 # we build.
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250
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251 while cur is not backtrace: # Here's the loop. We loop until we've snaked our way back to cur
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252
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253 returnText = backtrace.asciiChar + returnText # Create a new string that is the character at backtrace + everything
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254 # so far. So, for "tion" we'll build "n","on","ion","tion" as we ..
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255
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256 backtrace = backtrace.parentNode # ... climb back towards cur
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257
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258 return returnText # And, having reached here, we've met up with cur, and returnText holds
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259 # the string we built. Return it.
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260
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261 else: # This is the else to the original if.
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262 # If the letter typed isn't in a sub branch, then
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263 # the letter being typed isn't in our tree, so
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264 return "" # return the empty string
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265
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266
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267 # End of class LetterTree!
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268
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269
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270
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271 class _SingletonKey(object):
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272 def __new__(cls, *args, **kwargs):
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273 if not hasattr(cls, '_inst'):
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274 cls._inst = super(_SingletonKey, cls).__new__(cls, *args, **kwargs)
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275 return cls._inst
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276
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277 __key = _SingletonKey()
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278 LetterTree = LetterTreeClass(__key)
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279
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280 # This class extends wx.TextCtrl
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281 #
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282 # Extends: wx.TextCtrl
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283 #
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284 # Overrides:
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285 # wx.TextCtrl.__init__(self,parent,id,value,size,style,name)
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286 # wx.TextCtrl.OnChar(self,Event)
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287 #
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288 # Defines:
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289 # findWord(self,insert,st)
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290 class predTextCtrl(ExpandoTextCtrl):
0
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291
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292 # Initialization subroutine.
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293 #
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294 # self : instance of self
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295 # parent: reference to parent window (wxWindow, me-thinks)
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296 # id: new Window Id, default to -1 to create new (I think: see docs for wxPython)
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297 # value: String that is the initial value the control holds, defaulting to ""
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298 # size: defaults to wx.DefaultSize
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299 # style: defaults to 0
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300 # name: defaults to "text"
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301 # keyHook: must be a function pointer that takes self and a GetKeyCode object
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302 # validator: defaults to None
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303 #
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304 # Note: These parameters are essentially just passed back to the native wx.TextCtrl.
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305 # I basically just included (stole) enough of them from chatutils.py to make
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306 # it work. Known missing args are pos and validator, which aren't used by
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307 # chatutils.py.
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308 #
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309 # Returns: None
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310 #
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311 # Purpose: Constructor for predTextCtrl. Calls wx.TextCtrl.__init__ to get default init
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312 # behavior and then inits a LetterTree and captures the parent for later use in
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313 # passing events up the chain.
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314 def __init__(self, parent, id = -1, value = "" , size = wx.DefaultSize, style = 0, name = "text",keyHook = None, validator=None):
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315
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316 # Call super() for default behavior
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317 if validator:
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318 ExpandoTextCtrl.__init__(self, parent, id=id, value=value, size=size, style=style, name=name, validator=validator )
0
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319 else:
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320 ExpandoTextCtrl.__init__(self, parent, id=id, value=value, size=size, style=style, name=name)
0
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321
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322 self.tree = LetterTree # Instantiate a new LetterTree.
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323 # TODO: make name of word file an argument.
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324 self.parent = parent # Save parent for later use in passing KeyEvents
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325 self.cur = self.tree.rootNode # self.cur is a short cut placeholder for typing consecutive chars
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326 # It may be vestigal
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327 self.keyHook = keyHook # Save the keyHook passed in
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328 ExpandoTextCtrl._wrapLine = self._wrapLine
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329
0
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330
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331 def _wrapLine(self, line, dc, width):
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332 # Estimate where the control will wrap the lines and
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333 # return the count of extra lines needed.
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334 # Re writes ExpandoTextCtrl _wrapLine function
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335 pte = dc.GetPartialTextExtents(line)
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336 width -= wx.SystemSettings.GetMetric(wx.SYS_VSCROLL_X)
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337 idx = 0
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338 start = 0
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339 count = 0
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340 spc = -1
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341 while idx < len(pte):
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342 if line[idx] == ' ': spc = idx
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343 if pte[idx] - start > width:
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344 # we've reached the max width, add a new line
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345 count += 1
127
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346 # did we see a space? if so restart the count at that pos
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347 if spc != -1:
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348 idx = spc + 1
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349 spc = -1
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350 start = pte[idx]
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351 else:
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352 idx += 1
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353 return count
0
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354
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355 # findWord subroutine.
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356 #
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357 # self : instance of self
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358 # insert: index of last char in st
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359 # st : string from insert to the left
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360 #
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361 # Note: This implementation is about the third one for this method. Originally,
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362 # st was an arbitrary string and insert was the point within
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363 # this string to begin looking left. Since, I finally got it
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364 # to work right as it is around 2 in the morning, I'm not touching it, for now.
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365 #
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366 # Returns: String that is the word or "" if none found. This generally doesn't
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367 # happen, as st usually ends in a letter, which will be returned.
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368 #
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369 # Purpose: This function is generally used to figure out the beginning of the
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370 # current word being typed, for later use in a LetterTree.getPrediction()
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371 def findWord(self, insert, st):
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372
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373 # Good luck reading this one. Basically, I started out with an idea, and fiddled with the
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374 # constants as best I could until it worked. It's not a piece of work of which I'm too
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375 # proud. Basically, it's intent is to check each character to the left until it finds one
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376 # that isn't a letter. If it finds such a character, it stops and returns the slice
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377 # from that point to insert. Otherwise, it returns the whole thing, due to begin being
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378 # initialized to 0
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379
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380 begin = 0
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381 for offset in range(insert - 1):
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382 if st[-(offset + 2)] not in string.letters:
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383 begin = insert - (offset + 1)
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384 break
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385 return st[begin:insert]
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386
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387
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388 # OnChar subroutine.
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389 #
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390 # self : instance of self
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391 # event: a GetKeyCode object
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392 #
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393 # Returns: None
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394 #
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395 # Purpose: This function is the key event handler for predTextCtrl. It handles what it
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396 # needs to and passes the event on to it's parent's OnChar method.
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397 def OnChar(self,event):
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398
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399 # Before we do anything, call the keyHook handler, if not None
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400 # This is currently used to implement the typing/not_typing messages in a manner that
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401 # doesn't place the code here. Maybe I should reconsider that. :)
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402 if(self.keyHook):
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403 if self.keyHook(event) == 1: # if the passed in keyHook routine returns a one, it wants no predictive behavior
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404 self.parent.OnChar(event)
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405 return
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406
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407 # This bit converts the GetKeyCode() return (int) to a char if it's in a certain range
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408 asciiKey = ""
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409 if (event.GetKeyCode() < 256) and (event.GetKeyCode() > 19):
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410 asciiKey = chr(event.GetKeyCode())
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sirebral
parents:
diff changeset
411
127
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parents: 122
diff changeset
412 if asciiKey == "": # If we didn't convert it to a char, then process based on the int GetKeyCodes
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sirebral
parents: 122
diff changeset
413 if event.GetKeyCode() == wx.WXK_TAB: # We want to hook tabs to allow the user to signify acceptance of a
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parents: 122
diff changeset
414 # predicted word.
0
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parents:
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415 # Handle Tab key
127
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parents: 122
diff changeset
416 fromPos = toPos = 0 # get the current selection range
0
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parents:
diff changeset
417 (fromPos,toPos) = self.GetSelection()
127
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parents: 122
diff changeset
418 if (toPos - fromPos) == 0: # if there is no selection, pass tab on
0
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parents:
diff changeset
419 self.parent.OnChar(event)
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parents:
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420 return
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421 else: # This means at least one char is selected
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parents:
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422 self.SetInsertionPoint(toPos) # move the insertion point to the end of the selection
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parents:
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423 self.SetSelection(toPos,toPos) # and set the selection to no chars
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parents:
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424 # The prediction, if any, had been inserted into the text earlier, so
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sirebral
parents:
diff changeset
425 # moving the insertion point to the spot directly afterwards is
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parents:
diff changeset
426 # equivalent to acceptance. Without this, the next typed key would
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parents:
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427 # clobber the prediction.
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parents:
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428
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parents:
diff changeset
429 return # Don't pass tab on in this case
95
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parents: 59
diff changeset
430 elif event.GetKeyCode() == wx.WXK_RETURN and event.ShiftDown():
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parents: 59
diff changeset
431 logger.exception('Shift + Enter Not completed, 439, predtextCtrl', True)
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parents: 59
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432 st = self.GetValue()
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parents: 59
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433 st += '<br />'
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434 return
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diff changeset
435
0
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parents:
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436 elif event.GetKeyCode() == wx.WXK_RETURN: # We want to hook returns, so that we can update the word list
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parents:
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437 st = self.GetValue() # Grab the text from the control
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parents:
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438 newSt = "" # Init a buffer
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parents:
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439 # This block of code, by popular demand, changes the behavior of the control to ignore any prediction that
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parents:
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440 # hasn't been "accepted" when the enter key is struck.
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441 (startSel,endSel) = self.GetSelection() # get the curren selection
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parents:
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442
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parents:
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443 #
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parents:
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444 # Start update
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parents:
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445 # Changed the following to allow for more friendly behavior in
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parents:
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446 # a multilined predTextCtrl.
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parents:
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447 #
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parents:
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448 # front = st[:startSel] # Slice off the text to the front of where we are
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parents:
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449 # back = st[endSel:] # Slice off the text to the end from where we are
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parents:
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450 # st = front + back # This expression creates a string that get rid of any selected text.
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parents:
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451 # self.SetValue(st)
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parents:
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452
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453 self.Remove( startSel, endSel )
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parents:
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454 st = string.strip( self.GetValue() )
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parents:
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455 #
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parents:
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456 # End update
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parents:
diff changeset
457 #
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parents:
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458
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parents:
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459 # this loop will walk through every character in st and add it to
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parents:
diff changeset
460 # newSt if it's a letter. If it's not a letter, (e.g. a comma or
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sirebral
parents:
diff changeset
461 # hyphen) a space is added to newSt in it's place.
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sirebral
parents:
diff changeset
462 for ch in st:
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parents:
diff changeset
463 if ch not in string.letters:
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parents:
diff changeset
464 newSt += " "
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parents:
diff changeset
465 else:
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parents:
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466 newSt += ch
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parents:
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467 # Now that we've got a string of just letter sequences (words) and spaces
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parents:
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468 # split it and to a LetterTree.incWord on the lowercase version of it.
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parents:
diff changeset
469 # Reminder: incWord will increment the priority of existing words and add
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sirebral
parents:
diff changeset
470 # new ones
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parents:
diff changeset
471 for aWord in string.split(newSt):
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parents:
diff changeset
472 self.tree.incWord(string.lower(aWord))
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parents:
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473
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parents:
diff changeset
474 self.parent.OnChar(event) # Now that all of the words are added, pass the event and return
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sirebral
parents:
diff changeset
475 return
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sirebral
parents:
diff changeset
476
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sirebral
parents:
diff changeset
477 # We want to capture the right arrow key to fix a slight UI bug that occurs when one right arrows
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sirebral
parents:
diff changeset
478 # out of a selection. I set the InsertionPoint to the beginning of the selection. When the default
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sirebral
parents:
diff changeset
479 # right arrow event occurs, the selection goes away, but the cursor is in an unexpected location.
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sirebral
parents:
diff changeset
480 # This snippet fixes this behavior and then passes on the event.
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parents:
diff changeset
481 elif event.GetKeyCode() == wx.WXK_RIGHT:
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parents:
diff changeset
482 (startSel,endSel) = self.GetSelection()
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parents:
diff changeset
483 self.SetInsertionPoint(endSel)
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parents:
diff changeset
484 self.parent.OnChar(event)
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parents:
diff changeset
485 return
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parents:
diff changeset
486
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sirebral
parents:
diff changeset
487 # Ditto as wx.WXK_RIGHT, but for completeness sake
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sirebral
parents:
diff changeset
488 elif event.GetKeyCode() == wx.WXK_LEFT:
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sirebral
parents:
diff changeset
489 (startSel,endSel) = self.GetSelection()
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parents:
diff changeset
490 self.SetInsertionPoint(startSel)
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parents:
diff changeset
491 self.parent.OnChar(event)
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parents:
diff changeset
492 return
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parents:
diff changeset
493 else:
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parents:
diff changeset
494 # Handle any other non-ascii events by calling parent's OnChar()
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sirebral
parents:
diff changeset
495 self.parent.OnChar(event) #Call super.OnChar to get default behavior
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sirebral
parents:
diff changeset
496 return
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parents:
diff changeset
497 elif asciiKey in string.letters:
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parents:
diff changeset
498 # This is the real meat and potatoes of predTextCtrl. This is where most of the
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sirebral
parents:
diff changeset
499 # wx.TextCtrl logic is changed.
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parents:
diff changeset
500 (startSel,endSel) = self.GetSelection() # get the curren selection
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sirebral
parents:
diff changeset
501 st = self.GetValue() # and the text in the control
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sirebral
parents:
diff changeset
502 front = st[:startSel] # Slice off the text to the front of where we are
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sirebral
parents:
diff changeset
503 back = st[endSel:] # Slice off the text to the end from where we are
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sirebral
parents:
diff changeset
504 st = front + asciiKey + back # This expression creates a string that will insert the
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sirebral
parents:
diff changeset
505 # typed character (asciiKey is generated at the
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sirebral
parents:
diff changeset
506 # beginning of OnChar()) into the text. If there
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sirebral
parents:
diff changeset
507 # was text selected, that text will not be part
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sirebral
parents:
diff changeset
508 # of the new string, due to the way front and back
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sirebral
parents:
diff changeset
509 # were sliced.
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sirebral
parents:
diff changeset
510
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sirebral
parents:
diff changeset
511 insert = startSel + 1 # creates an int that denotes where the new InsertionPoint
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sirebral
parents:
diff changeset
512 # should be.
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sirebral
parents:
diff changeset
513 curWord = "" # Assume there's a problem with finding the curWord
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sirebral
parents:
diff changeset
514 if (len(back) == 0) or (back[0] not in string.letters): # We should only insert a prediction if we are typing
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sirebral
parents:
diff changeset
515 # at the end of a word, not in the middle. There are
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sirebral
parents:
diff changeset
516 # three cases: we are typing at the end of the string or
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sirebral
parents:
diff changeset
517 # we are typing in the middle of the string and the next
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sirebral
parents:
diff changeset
518 # char is NOT a letter or we are typing in the middle of the
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sirebral
parents:
diff changeset
519 # string and the next char IS a letter. Only the former two
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sirebral
parents:
diff changeset
520 # cases denote that we should make a prediction
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sirebral
parents:
diff changeset
521 # Note: The order of the two logical clauses here is important!
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sirebral
parents:
diff changeset
522 # If len(back) == 0, then the expression back[0] will
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sirebral
parents:
diff changeset
523 # blow up with an out of bounds array subscript. Luckily
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sirebral
parents:
diff changeset
524 # the or operator is a short-circuit operator and in this
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sirebral
parents:
diff changeset
525 # case will only evaluate back[0] if len(back) != 0, in
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sirebral
parents:
diff changeset
526 # which we're safely in bounds.
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sirebral
parents:
diff changeset
527
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sirebral
parents:
diff changeset
528 curWord = self.findWord(insert,front + asciiKey) # Now that we know we're supposed to make a prediction,
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sirebral
parents:
diff changeset
529 # let's find what word root to use in our prediction.
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sirebral
parents:
diff changeset
530 # Note: This is using the confusing findWord method. I
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sirebral
parents:
diff changeset
531 # send it insert and the text from the beginning
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sirebral
parents:
diff changeset
532 # of the text through the key just entered. This is
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sirebral
parents:
diff changeset
533 # NOT the original usage, but it does work. See
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sirebral
parents:
diff changeset
534 # findWord() for more details.
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sirebral
parents:
diff changeset
535
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sirebral
parents:
diff changeset
536 else: # Here, we've found we're in the middle of a word, so we're
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sirebral
parents:
diff changeset
537 # going to call the parent's event handler.
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sirebral
parents:
diff changeset
538 self.parent.OnChar(event)
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sirebral
parents:
diff changeset
539 return
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sirebral
parents:
diff changeset
540
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sirebral
parents:
diff changeset
541 if curWord == "": # Here, we do a quick check to make sure we have a good root
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sirebral
parents:
diff changeset
542 # word. If not, allow the default thing to happen. Of course,
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sirebral
parents:
diff changeset
543 # now that I'm documenting this, it occurs to me to wonder why
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sirebral
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544 # I didn't do the same thing I just talked about. Hmmmmmm.
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545
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546 self.parent.OnChar(event) # we're done here
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547 return
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548
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549 self.cur = self.tree.findWordNode(string.lower(curWord[:-1])) # Still with me? We're almost done. At this point, we
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550 # need to convert our word string to a Letter node,
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551 # because that's what getPrediction expects. Notice
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552 # that we're feeding in the string with the last
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553 # char sliced off. For developmentally historical
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554 # reasons, getPrediction wants the node just before
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555 # the typed character and the typed char separately.
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556
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557
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558 if self.cur is None:
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559 self.parent.OnChar(event) # if there's no word or no match, we're done
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560 return
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561
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562
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563 # get the prediction
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564 predictText = self.tree.getPrediction(string.lower(asciiKey),self.cur) # This is the big prediction, as noted above
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565 # Note the use of string.lower() because we
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566 # keep the word list in all lower case,but we
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567 # want to be able to match any capitalization
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568
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569 if predictText == "":
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570 self.parent.OnChar(event) # if there's no prediction, we're done
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571 return
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572
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573 # And now for the big finale. We're going to take the string st
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574 # we created earlier and insert the prediction right after the
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575 # newly typed character.
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576 front = st[:insert] # Grab a new front from st
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577 back = st[insert:] # Grab a new back
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578
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579 st = front + predictText + back # Insert the prediction
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580
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581 self.SetValue(st) # Now, overwrite the controls text with the new text
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582 self.SetInsertionPoint(insert) # Set the proper insertion point, directly behind the
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583 # newly typed character and directly in front of the
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584 # predicted text.
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585
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586 self.SetSelection(insert,insert+len(predictText)) # Very important! Set the selection to encompass the predicted
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587 # text. This way, the user can ignore the prediction by simply
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588 # continuing to type. Remember, if the user wants the prediction
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589 # s/he must strike the tab key at this point. Of course, one could
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590 # just use the right arrow key as well, but that's not as easy to
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591 # reach.
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592
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593 return # Done! Do NOT pass the event on at this point, because it's all done.
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594 else:
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595 # Handle every other non-letter ascii (e.g. semicolon) by passing the event on.
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596 self.parent.OnChar(event) #Call super.OnChar to get default behavior
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597 return
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598 # End of class predTextCtrl!