eric6/Graphics/UMLItem.py

Tue, 02 Mar 2021 17:17:09 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Tue, 02 Mar 2021 17:17:09 +0100
changeset 8143
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parent 7923
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child 8207
d359172d11be
permissions
-rw-r--r--

Changed the use of PyQt enums because the way they were used previously is deprecated since two years and replaced some deprecated Qt stuff.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2004 - 2021 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 the UMLItem base class.
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8 """
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9
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10 from PyQt5.QtCore import Qt, QSizeF
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11 from PyQt5.QtGui import QColor, QPen
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12 from PyQt5.QtWidgets import QGraphicsItem, QGraphicsRectItem, QStyle
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13
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14 import Preferences
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15
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16
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17 class UMLModel(object):
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18 """
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19 Class implementing the UMLModel base class.
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20 """
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21 def __init__(self, name):
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22 """
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23 Constructor
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24
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25 @param name package name (string)
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26 """
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27 self.name = name
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28
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29 def getName(self):
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30 """
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31 Public method to retrieve the model name.
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32
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33 @return model name (string)
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34 """
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35 return self.name
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36
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37
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38 class UMLItem(QGraphicsRectItem):
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39 """
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40 Class implementing the UMLItem base class.
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41 """
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42 ItemType = "UMLItem"
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43
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44 def __init__(self, model=None, x=0, y=0, rounded=False, colors=None,
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45 parent=None):
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46 """
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47 Constructor
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48
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49 @param model UML model containing the item data
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50 @type UMLModel
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51 @param x x-coordinate
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52 @type int
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53 @param y y-coordinate
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54 @type int
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55 @param rounded flag indicating a rounded corner
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56 @type bool
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57 @param colors tuple containing the foreground and background colors
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58 @type tuple of (QColor, QColor)
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59 @param parent reference to the parent object
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60 @type QGraphicsItem
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61 """
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62 super(UMLItem, self).__init__(parent)
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63 self.model = model
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64
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65 if colors is None:
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66 self._colors = (QColor(Qt.GlobalColor.black),
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67 QColor(Qt.GlobalColor.white))
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68 else:
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69 self._colors = colors
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70 self.setPen(QPen(self._colors[0]))
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71
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72 self.font = Preferences.getGraphics("Font")
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73 self.margin = 5
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74 self.associations = []
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75 self.shouldAdjustAssociations = False
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76 self.__id = -1
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77
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78 self.setRect(x, y, 60, 30)
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79
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80 if rounded:
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81 p = self.pen()
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82 p.setCapStyle(Qt.PenCapStyle.RoundCap)
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83 p.setJoinStyle(Qt.PenJoinStyle.RoundJoin)
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84
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85 self.setFlag(QGraphicsItem.GraphicsItemFlag.ItemIsMovable, True)
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86 self.setFlag(QGraphicsItem.GraphicsItemFlag.ItemIsSelectable, True)
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87 try:
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88 self.setFlag(
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89 QGraphicsItem.GraphicsItemFlag.ItemSendsGeometryChanges, True)
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90 except AttributeError:
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91 # only available for Qt 4.6.0 and newer
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92 pass
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93
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94 def getName(self):
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95 """
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96 Public method to retrieve the item name.
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97
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98 @return item name (string)
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99 """
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100 if self.model:
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101 return self.model.name
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102 else:
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103 return ""
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104
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105 def setSize(self, width, height):
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106 """
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107 Public method to set the rectangles size.
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108
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109 @param width width of the rectangle (float)
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110 @param height height of the rectangle (float)
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111 """
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112 rect = self.rect()
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113 rect.setSize(QSizeF(width, height))
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114 self.setRect(rect)
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115
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116 def addAssociation(self, assoc):
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117 """
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118 Public method to add an association to this widget.
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119
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120 @param assoc association to be added (AssociationWidget)
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121 """
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122 if assoc and assoc not in self.associations:
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123 self.associations.append(assoc)
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124
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125 def removeAssociation(self, assoc):
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parents:
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126 """
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2f2a4a76dd22 Corrected a bunch of source docu issues.
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parents: 3178
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127 Public method to remove an association to this widget.
0
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128
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parents:
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129 @param assoc association to be removed (AssociationWidget)
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parents:
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130 """
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parents:
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131 if assoc and assoc in self.associations:
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parents:
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132 self.associations.remove(assoc)
2039
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parents: 2038
diff changeset
133
0
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parents:
diff changeset
134 def removeAssociations(self):
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parents:
diff changeset
135 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3178
diff changeset
136 Public method to remove all associations of this widget.
0
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parents:
diff changeset
137 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
138 for assoc in self.associations[:]:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
139 assoc.unassociate()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
140 assoc.hide()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
141 del assoc
2039
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parents: 2038
diff changeset
142
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
143 def adjustAssociations(self):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
144 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3178
diff changeset
145 Public method to adjust the associations to widget movements.
0
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parents:
diff changeset
146 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
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147 if self.shouldAdjustAssociations:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
148 for assoc in self.associations:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
149 assoc.widgetMoved()
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parents:
diff changeset
150 self.shouldAdjustAssociations = False
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parents: 2038
diff changeset
151
0
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parents:
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152 def moveBy(self, dx, dy):
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parents:
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153 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3178
diff changeset
154 Public overriden method to move the widget relative.
0
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155
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parents:
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156 @param dx relative movement in x-direction (float)
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parents:
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157 @param dy relative movement in y-direction (float)
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parents:
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158 """
2525
8b507a9a2d40 Script changes: Future import added, super calls modified and unicode behavior for str.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 2302
diff changeset
159 super(UMLItem, self).moveBy(dx, dy)
0
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parents:
diff changeset
160 self.adjustAssociations()
2039
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parents: 2038
diff changeset
161
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
162 def setPos(self, x, y):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
163 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3178
diff changeset
164 Public overriden method to set the items position.
0
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parents:
diff changeset
165
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
166 @param x absolute x-position (float)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
167 @param y absolute y-position (float)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
168 """
2525
8b507a9a2d40 Script changes: Future import added, super calls modified and unicode behavior for str.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents: 2302
diff changeset
169 super(UMLItem, self).setPos(x, y)
0
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parents:
diff changeset
170 self.adjustAssociations()
2039
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parents: 2038
diff changeset
171
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
172 def itemChange(self, change, value):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
173 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3178
diff changeset
174 Public method called when an items state changes.
0
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parents:
diff changeset
175
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
176 @param change the item's change (QGraphicsItem.GraphicsItemChange)
7
c679fb30c8f3 Change code dealing with QVariant (and QSettings) to use the PyQt4 QVariant v2 API.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 0
diff changeset
177 @param value the value of the change
c679fb30c8f3 Change code dealing with QVariant (and QSettings) to use the PyQt4 QVariant v2 API.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 0
diff changeset
178 @return adjusted values
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
179 """
8143
2c730d5fd177 Changed the use of PyQt enums because the way they were used previously is deprecated since two years and replaced some deprecated Qt stuff.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7923
diff changeset
180 if change == QGraphicsItem.GraphicsItemChange.ItemPositionChange:
2038
72557ef75de1 Added ability to move graphics items in the diagram via the cursor keys and to limit the item position to the scene.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
181 # 1. remember to adjust associations
0
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parents:
diff changeset
182 self.shouldAdjustAssociations = True
2038
72557ef75de1 Added ability to move graphics items in the diagram via the cursor keys and to limit the item position to the scene.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
183
72557ef75de1 Added ability to move graphics items in the diagram via the cursor keys and to limit the item position to the scene.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
184 # 2. ensure the new position is inside the scene
72557ef75de1 Added ability to move graphics items in the diagram via the cursor keys and to limit the item position to the scene.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
185 rect = self.scene().sceneRect()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
186 if not rect.contains(value):
72557ef75de1 Added ability to move graphics items in the diagram via the cursor keys and to limit the item position to the scene.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
187 # keep the item inside the scene
72557ef75de1 Added ability to move graphics items in the diagram via the cursor keys and to limit the item position to the scene.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
188 value.setX(min(rect.right(), max(value.x(), rect.left())))
72557ef75de1 Added ability to move graphics items in the diagram via the cursor keys and to limit the item position to the scene.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
189 value.setY(min(rect.bottom(), max(value.y(), rect.top())))
72557ef75de1 Added ability to move graphics items in the diagram via the cursor keys and to limit the item position to the scene.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
190 return value
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
191
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
192 return QGraphicsItem.itemChange(self, change, value)
2039
fa41ccd7f7bc Added the capability to rebuild a diagram without losing the current item positions.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2038
diff changeset
193
945
8cd4d08fa9f6 Made code mostly PEP 8 compliant (except all whitespace and line length).
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 791
diff changeset
194 def paint(self, painter, option, widget=None):
0
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parents:
diff changeset
195 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
196 Public method to paint the item in local coordinates.
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
197
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parents:
diff changeset
198 @param painter reference to the painter object (QPainter)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
199 @param option style options (QStyleOptionGraphicsItem)
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
200 @param widget optional reference to the widget painted on (QWidget)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
201 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
202 pen = self.pen()
7254
f00d825fbdb3 Continued to resolve code style issue M841.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7229
diff changeset
203 if (
8143
2c730d5fd177 Changed the use of PyQt enums because the way they were used previously is deprecated since two years and replaced some deprecated Qt stuff.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7923
diff changeset
204 (option.state & QStyle.StateFlag.State_Selected) ==
2c730d5fd177 Changed the use of PyQt enums because the way they were used previously is deprecated since two years and replaced some deprecated Qt stuff.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7923
diff changeset
205 QStyle.State(QStyle.StateFlag.State_Selected)
7254
f00d825fbdb3 Continued to resolve code style issue M841.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 7229
diff changeset
206 ):
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
207 pen.setWidth(2)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
208 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
209 pen.setWidth(1)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
210
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
211 painter.setPen(pen)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
212 painter.setBrush(self.brush())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
213 painter.drawRect(self.rect())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
214 self.adjustAssociations()
2039
fa41ccd7f7bc Added the capability to rebuild a diagram without losing the current item positions.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2038
diff changeset
215
5587
ea526b78ee6c Started to fix code style issues detected by the extended style checker.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5389
diff changeset
216 def setId(self, itemId):
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
217 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
218 Public method to assign an ID to the item.
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
219
5587
ea526b78ee6c Started to fix code style issues detected by the extended style checker.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5389
diff changeset
220 @param itemId assigned ID (integer)
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
221 """
5587
ea526b78ee6c Started to fix code style issues detected by the extended style checker.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5389
diff changeset
222 self.__id = itemId
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
223
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
224 def getId(self):
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
225 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
226 Public method to get the item ID.
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
227
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
228 @return ID of the item (integer)
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
229 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
230 return self.__id
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
231
2033
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
232 def getItemType(self):
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
233 """
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
234 Public method to get the item's type.
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
235
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
236 @return item type (string)
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
237 """
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
238 return self.ItemType
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
239
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
240 def buildItemDataString(self):
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
241 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
242 Public method to build a string to persist the specific item data.
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
243
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
244 This string must start with ", " and should be built like
2992
dbdf27746da5 Continued to shorten the code lines to max. 79 characters.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
245 "attribute=value" with pairs separated by ", ". value must not
dbdf27746da5 Continued to shorten the code lines to max. 79 characters.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
246 contain ", " or newlines.
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
247
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
248 @return persistence data (string)
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
249 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
250 return ""
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
251
2034
8de0fc1f7fef Implemented functions to load UML graphics from disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
252 def parseItemDataString(self, version, data):
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
253 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
254 Public method to parse the given persistence data.
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
255
2034
8de0fc1f7fef Implemented functions to load UML graphics from disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
256 @param version version of the data (string)
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
257 @param data persisted data to be parsed (string)
2034
8de0fc1f7fef Implemented functions to load UML graphics from disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
258 @return flag indicating success (boolean)
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
259 """
2034
8de0fc1f7fef Implemented functions to load UML graphics from disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
260 return True

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