Graphics/ModuleItem.py

Wed, 12 Sep 2012 19:41:50 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Wed, 12 Sep 2012 19:41:50 +0200
changeset 2039
fa41ccd7f7bc
parent 2034
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child 2302
f29e9405c851
permissions
-rw-r--r--

Added the capability to rebuild a diagram without losing the current item positions.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2007 - 2012 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5
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6 """
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7 Module implementing a module item.
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8 """
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9
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10 from PyQt4.QtGui import QFont, QGraphicsSimpleTextItem, QStyle
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11
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12 from .UMLItem import UMLModel, UMLItem
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14
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15 class ModuleModel(UMLModel):
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16 """
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17 Class implementing the module model.
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18 """
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19 def __init__(self, name, classlist=[]):
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20 """
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21 Constructor
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22
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23 @param name the module name (string)
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24 @param classlist list of class names (list of strings)
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25 """
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26 super().__init__(name)
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27
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28 self.classlist = classlist
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29
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30 def addClass(self, classname):
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31 """
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32 Method to add a class to the module model.
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33
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34 @param classname class name to be added (string)
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35 """
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36 self.classlist.append(classname)
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37
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38 def getClasses(self):
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39 """
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40 Method to retrieve the classes of the module.
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41
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42 @return list of class names (list of strings)
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43 """
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44 return self.classlist[:]
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45
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46
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47 class ModuleItem(UMLItem):
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48 """
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49 Class implementing a module item.
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50 """
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51 ItemType = "module"
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52
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53 def __init__(self, model=None, x=0, y=0, rounded=False,
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54 parent=None, scene=None):
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55 """
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56 Constructor
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57
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58 @param model module model containing the module data (ModuleModel)
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59 @param x x-coordinate (integer)
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60 @param y y-coordinate (integer)
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61 @keyparam rounded flag indicating a rounded corner (boolean)
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62 @keyparam parent reference to the parent object (QGraphicsItem)
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63 @keyparam scene reference to the scene object (QGraphicsScene)
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64 """
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65 UMLItem.__init__(self, model, x, y, rounded, parent)
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66
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67 scene.addItem(self)
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68
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69 if self.model:
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70 self.__createTexts()
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71 self.__calculateSize()
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72
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73 def __createTexts(self):
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74 """
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75 Private method to create the text items of the module item.
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76 """
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77 if self.model is None:
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78 return
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79
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80 boldFont = QFont(self.font)
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81 boldFont.setBold(True)
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82
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83 classes = self.model.getClasses()
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84
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85 x = self.margin + self.rect().x()
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86 y = self.margin + self.rect().y()
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87 self.header = QGraphicsSimpleTextItem(self)
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88 self.header.setFont(boldFont)
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89 self.header.setText(self.model.getName())
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90 self.header.setPos(x, y)
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91 y += self.header.boundingRect().height() + self.margin
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92 if classes:
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93 txt = "\n".join(classes)
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94 else:
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95 txt = " "
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96 self.classes = QGraphicsSimpleTextItem(self)
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97 self.classes.setFont(self.font)
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98 self.classes.setText(txt)
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99 self.classes.setPos(x, y)
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100
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101 def __calculateSize(self):
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102 """
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103 Private method to calculate the size of the module item.
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104 """
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105 if self.model is None:
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106 return
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107
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108 width = self.header.boundingRect().width()
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109 height = self.header.boundingRect().height()
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110 if self.classes:
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111 width = max(width, self.classes.boundingRect().width())
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112 height = height + self.classes.boundingRect().height()
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113 self.setSize(width + 2 * self.margin, height + 2 * self.margin)
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114
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115 def setModel(self, model):
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116 """
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117 Method to set the module model.
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118
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119 @param model module model containing the module data (ModuleModel)
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120 """
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121 self.scene().removeItem(self.header)
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122 self.header = None
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123 if self.classes:
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124 self.scene().removeItem(self.classes)
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125 self.meths = None
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126 self.model = model
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127 self.__createTexts()
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128 self.__calculateSize()
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129
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130 def paint(self, painter, option, widget=None):
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131 """
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132 Public method to paint the item in local coordinates.
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133
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134 @param painter reference to the painter object (QPainter)
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parents:
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135 @param option style options (QStyleOptionGraphicsItem)
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136 @param widget optional reference to the widget painted on (QWidget)
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parents:
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137 """
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parents:
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138 pen = self.pen()
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parents:
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139 if (option.state & QStyle.State_Selected) == QStyle.State(QStyle.State_Selected):
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140 pen.setWidth(2)
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parents:
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141 else:
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parents:
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142 pen.setWidth(1)
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143
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144 painter.setPen(pen)
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parents:
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145 painter.setBrush(self.brush())
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parents:
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146 painter.setFont(self.font)
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147
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148 offsetX = self.rect().x()
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parents:
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149 offsetY = self.rect().y()
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150 w = self.rect().width()
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parents:
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151 h = self.rect().height()
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152
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153 painter.drawRect(offsetX, offsetY, w, h)
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parents:
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154 y = self.margin + self.header.boundingRect().height()
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parents:
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155 painter.drawLine(offsetX, offsetY + y, offsetX + w - 1, offsetY + y)
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parents:
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156
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157 self.adjustAssociations()
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158
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159 def buildItemDataString(self):
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parents: 1509
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160 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
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161 Public method to build a string to persist the specific item data.
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162
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parents: 1509
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163 This string must start with ", " and should be built like
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parents: 1509
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164 "attribute=value" with pairs separated by ", ". value must not contain ", "
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165 or newlines.
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parents: 1509
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166
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167 @return persistence data (string)
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parents: 1509
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168 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
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169 entries = [
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parents: 1509
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170 "name={0}".format(self.model.getName()),
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parents: 1509
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171 ]
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parents: 1509
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172 classes = self.model.getClasses()
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173 if classes:
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parents: 1509
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174 entries.append("classes={0}".format("||".join(classes)))
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175
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176 return ", " + ", ".join(entries)
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177
2034
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diff changeset
178 def parseItemDataString(self, version, data):
2030
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179 """
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parents: 1509
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180 Public method to parse the given persistence data.
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181
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182 @param version version of the data (string)
2030
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183 @param data persisted data to be parsed (string)
2034
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184 @return flag indicating success (boolean)
2030
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185 """
2034
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Detlev Offenbach <detlev@die-offenbachs.de>
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186 parts = data.split(", ")
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parents: 2033
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187 if len(parts) < 1:
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188 return False
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parents: 2033
diff changeset
189
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
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190 name = ""
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parents: 2033
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191 classes = []
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parents: 2033
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192
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
193 for part in parts:
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parents: 2033
diff changeset
194 key, value = part.split("=", 1)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
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195 if key == "name":
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
196 name = value.strip()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
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197 elif key == "classes":
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parents: 2033
diff changeset
198 classes = value.strip().split("||")
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parents: 2033
diff changeset
199 else:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
200 return False
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
201
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Detlev Offenbach <detlev@die-offenbachs.de>
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diff changeset
202 self.model = ModuleModel(name, classes)
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diff changeset
203 self.__createTexts()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
204 self.__calculateSize()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
205
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
206 return True

eric ide

mercurial