annotate engine/python/fife/extensions/pychan/autoposition.py @ 697:ecaa4d98f05f tip

Abstracted the GUI code and refactored the GUIChan-specific code into its own module. * Most of the GUIChan code has been refactored into its own gui/guichan module. However, references to the GuiFont class still persist in the Engine and GuiManager code and these will need further refactoring. * GuiManager is now an abstract base class which specific implementations (e.g. GUIChan) should subclass. * The GUIChan GUI code is now a concrete implementation of GuiManager, most of which is in the new GuiChanGuiManager class. * The GUI code in the Console class has been refactored out of the Console and into the GUIChan module as its own GuiChanConsoleWidget class. The rest of the Console class related to executing commands was left largely unchanged. * Existing client code may need to downcast the GuiManager pointer received from FIFE::Engine::getGuiManager() to GuiChanGuiManager, since not all functionality is represented in the GuiManager abstract base class. Python client code can use the new GuiChanGuiManager.castTo static method for this purpose.
author M. George Hansen <technopolitica@gmail.com>
date Sat, 18 Jun 2011 00:28:40 -1000
parents 64738befdf3b
children
rev   line source
378
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1 # -*- coding: utf-8 -*-
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2
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3 # ####################################################################
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4 # Copyright (C) 2005-2009 by the FIFE team
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5 # http://www.fifengine.de
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6 # This file is part of FIFE.
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7 #
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8 # FIFE is free software; you can redistribute it and/or
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9 # modify it under the terms of the GNU Lesser General Public
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10 # License as published by the Free Software Foundation; either
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11 # version 2.1 of the License, or (at your option) any later version.
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12 #
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13 # This library is distributed in the hope that it will be useful,
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 # Lesser General Public License for more details.
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17 #
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18 # You should have received a copy of the GNU Lesser General Public
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19 # License along with this library; if not, write to the
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20 # Free Software Foundation, Inc.,
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21 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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22 # ####################################################################
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23
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24 """
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25 Automatic widget positioning
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26 ============================
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27
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28 You can use the C{position_techinque} attribute
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29 on top level widgets which can also be set from xml.
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30
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31 For direct use call L{placeWidget}.
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32 """
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33
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34 from internal import screen_width, screen_height
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35 from exceptions import PyChanException
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36
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37 EXPLICIT = "explicit"
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38 AUTOMATIC = "automatic"
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39
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40 TOP = "top"
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41 LEFT = "left"
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42 RIGHT = "right"
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43 CENTER = "center"
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44 BOTTOM = "bottom"
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45
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46
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47 def _splicePosition(p):
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48 if "+" in p:
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49 technique,delta = p.split("+")
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50 elif "-" in p:
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51 technique,delta = p.split("-")
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52 delta = '-' + delta
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53 else:
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54 technique,delta = p,0
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55 delta = int(delta)
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56 return technique,delta
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57
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58 def _parsePosition(position):
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59 try:
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60 if position == AUTOMATIC:
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61 position = "center+0:center+0"
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62
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63 x_pos,y_pos = position.split(":")
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64 x_pos, x_delta = _splicePosition(x_pos)
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65 y_pos, y_delta = _splicePosition(y_pos)
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66
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67 if x_pos not in [EXPLICIT,LEFT,CENTER,RIGHT]:
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68 raise
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69 if y_pos not in [EXPLICIT,TOP,CENTER,BOTTOM]:
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70 raise
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71 except:
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72 raise PyChanException("Malformed position definition: " + repr(position))
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73 return x_pos,x_delta,y_pos,y_delta
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74
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75 def placeWidget(widget,position):
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76 """
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77 Place a widget according to a string defining relative coordinates to screen borders.
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78
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79 The position definition has to be of the form: C{"<x_pos><x_delta>:<y_pos><y_delta>"}
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80
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81 C{<x_pos>} may be one of:
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82 - left
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83 - right
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84 - center
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85 - explicit
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86
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87 C{<y_pos>} may be one of:
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88 - top
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89 - bottom
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90 - center
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91 - explicit
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92
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93 C{explicit} means that the widgets x or y position will not be touched. The rest should be
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94 self explanatory.
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95
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96 C{<x_delta>} and C{<y_delta>} must be of the form: +pixel_number or -pixel_number. Or comletely
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97 omitted. Note that the sign has to be there for for positive deltas, too.
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98
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99 For brevity two shortcuts exist:
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100 - "explict" -> "explict:explict"
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101 - "automatic" -> "center:center"
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102
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103 A few examples::
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104 "right-20:top"
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105 "center:top+10"
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106 "center:center"
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107
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108 @param widget: The PyChan widget.
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109 @param position: A position definition.
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110
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111 If the position cannot be parsed a L{PyChanException} is thrown.
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112
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113 """
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114 if position == EXPLICIT:
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115 return
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116 x_pos,x_delta,y_pos,y_delta = _parsePosition(position)
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117
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118 x,y = widget.position
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119 w,h = widget.size
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120
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121 if x_pos == CENTER:
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122 x = (screen_width()-w)/2 + x_delta
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123
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124 if y_pos == CENTER:
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125 y = (screen_height()-h)/2 + y_delta
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126
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127 if x_pos == LEFT:
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128 x = x_delta
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129
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130 if y_pos == TOP:
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131 y = y_delta
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132
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133 if x_pos == RIGHT:
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134 x = screen_width() - w + x_delta
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135
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136 if y_pos == BOTTOM:
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137 y = screen_height() - h + y_delta
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138
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139 widget.position = x,y
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140
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141
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142