Graphics/UMLItem.py

Tue, 07 Mar 2017 18:53:18 +0100

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Tue, 07 Mar 2017 18:53:18 +0100
changeset 5587
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parent 5389
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child 6048
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permissions
-rw-r--r--

Started to fix code style issues detected by the extended style checker.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2004 - 2017 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 __future__ import unicode_literals
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12 from PyQt5.QtCore import Qt, QSizeF
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13 from PyQt5.QtWidgets import QGraphicsItem, QGraphicsRectItem, QStyle
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14
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15 import Preferences
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16
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17
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18 class UMLModel(object):
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19 """
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20 Class implementing the UMLModel base class.
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21 """
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22 def __init__(self, name):
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23 """
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24 Constructor
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25
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26 @param name package name (string)
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27 """
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28 self.name = name
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29
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30 def getName(self):
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31 """
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32 Public method to retrieve the model name.
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33
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34 @return model name (string)
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35 """
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36 return self.name
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37
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38
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39 class UMLItem(QGraphicsRectItem):
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40 """
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41 Class implementing the UMLItem base class.
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42 """
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43 ItemType = "UMLItem"
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44
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45 def __init__(self, model=None, x=0, y=0, rounded=False, 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 (UMLModel)
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50 @param x x-coordinate (integer)
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51 @param y y-coordinate (integer)
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52 @param rounded flag indicating a rounded corner (boolean)
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53 @keyparam parent reference to the parent object (QGraphicsItem)
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54 """
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55 super(UMLItem, self).__init__(parent)
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56 self.model = model
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57
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58 self.font = Preferences.getGraphics("Font")
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59 self.margin = 5
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60 self.associations = []
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61 self.shouldAdjustAssociations = False
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62 self.__id = -1
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63
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64 self.setRect(x, y, 60, 30)
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65
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66 if rounded:
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67 p = self.pen()
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68 p.setCapStyle(Qt.RoundCap)
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69 p.setJoinStyle(Qt.RoundJoin)
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70
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71 self.setFlag(QGraphicsItem.ItemIsMovable, True)
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72 self.setFlag(QGraphicsItem.ItemIsSelectable, True)
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73 try:
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74 self.setFlag(QGraphicsItem.ItemSendsGeometryChanges, True)
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75 except AttributeError:
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76 # only available for Qt 4.6.0 and newer
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77 pass
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78
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79 def getName(self):
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80 """
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81 Public method to retrieve the item name.
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82
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83 @return item name (string)
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84 """
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85 if self.model:
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86 return self.model.name
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87 else:
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88 return ""
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89
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90 def setSize(self, width, height):
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91 """
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92 Public method to set the rectangles size.
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93
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94 @param width width of the rectangle (float)
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95 @param height height of the rectangle (float)
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96 """
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97 rect = self.rect()
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98 rect.setSize(QSizeF(width, height))
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99 self.setRect(rect)
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100
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101 def addAssociation(self, assoc):
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102 """
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103 Public method to add an association to this widget.
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104
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105 @param assoc association to be added (AssociationWidget)
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106 """
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107 if assoc and assoc not in self.associations:
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108 self.associations.append(assoc)
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109
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110 def removeAssociation(self, assoc):
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111 """
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112 Public method to remove an association to this widget.
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113
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114 @param assoc association to be removed (AssociationWidget)
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115 """
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116 if assoc and assoc in self.associations:
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117 self.associations.remove(assoc)
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118
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119 def removeAssociations(self):
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120 """
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121 Public method to remove all associations of this widget.
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122 """
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123 for assoc in self.associations[:]:
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124 assoc.unassociate()
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125 assoc.hide()
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126 del assoc
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127
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128 def adjustAssociations(self):
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129 """
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parents: 3178
diff changeset
130 Public method to adjust the associations to widget movements.
0
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parents:
diff changeset
131 """
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
132 if self.shouldAdjustAssociations:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
133 for assoc in self.associations:
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
134 assoc.widgetMoved()
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
135 self.shouldAdjustAssociations = False
2039
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2038
diff changeset
136
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
137 def moveBy(self, dx, dy):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
138 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3178
diff changeset
139 Public overriden method to move the widget relative.
0
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parents:
diff changeset
140
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parents:
diff changeset
141 @param dx relative movement in x-direction (float)
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parents:
diff changeset
142 @param dy relative movement in y-direction (float)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
143 """
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
144 super(UMLItem, self).moveBy(dx, dy)
0
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parents:
diff changeset
145 self.adjustAssociations()
2039
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parents: 2038
diff changeset
146
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
147 def setPos(self, x, y):
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
148 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3178
diff changeset
149 Public overriden method to set the items position.
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
150
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
151 @param x absolute x-position (float)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
152 @param y absolute y-position (float)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
153 """
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
154 super(UMLItem, self).setPos(x, y)
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
155 self.adjustAssociations()
2039
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2038
diff changeset
156
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
157 def itemChange(self, change, value):
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
158 """
3591
2f2a4a76dd22 Corrected a bunch of source docu issues.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 3178
diff changeset
159 Public method called when an items state changes.
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
160
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
161 @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
162 @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
163 @return adjusted values
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
164 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
165 if change == QGraphicsItem.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
166 # 1. remember to adjust associations
0
de9c2efb9d02 Started porting eric4 to Python3
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parents:
diff changeset
167 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
168
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
169 # 2. ensure the new position is inside the scene
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Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2034
diff changeset
170 rect = self.scene().sceneRect()
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
171 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
172 # 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
173 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
174 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
175 return 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
176
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
177 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
178
945
8cd4d08fa9f6 Made code mostly PEP 8 compliant (except all whitespace and line length).
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 791
diff changeset
179 def paint(self, painter, option, widget=None):
0
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
180 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
181 Public method to paint the item in local coordinates.
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
182
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
183 @param painter reference to the painter object (QPainter)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
184 @param option style options (QStyleOptionGraphicsItem)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
185 @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
186 """
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
187 pen = self.pen()
2992
dbdf27746da5 Continued to shorten the code lines to max. 79 characters.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
188 if (option.state & QStyle.State_Selected) == \
dbdf27746da5 Continued to shorten the code lines to max. 79 characters.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2302
diff changeset
189 QStyle.State(QStyle.State_Selected):
0
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
190 pen.setWidth(2)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
191 else:
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
192 pen.setWidth(1)
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Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
193
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
194 painter.setPen(pen)
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
195 painter.setBrush(self.brush())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
196 painter.drawRect(self.rect())
de9c2efb9d02 Started porting eric4 to Python3
Detlev Offenbach <detlev@die-offenbachs.de>
parents:
diff changeset
197 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
198
5587
ea526b78ee6c Started to fix code style issues detected by the extended style checker.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5389
diff changeset
199 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
200 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
201 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
202
5587
ea526b78ee6c Started to fix code style issues detected by the extended style checker.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5389
diff changeset
203 @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
204 """
5587
ea526b78ee6c Started to fix code style issues detected by the extended style checker.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 5389
diff changeset
205 self.__id = itemId
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
206
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
207 def getId(self):
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
208 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
209 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
210
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
211 @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
212 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
213 return self.__id
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
214
2033
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
215 def getItemType(self):
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
216 """
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
217 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
218
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
219 @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
220 """
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
221 return self.ItemType
4b99609f6a87 Some more refactorings to prepare loading graphics diagrams from file.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2030
diff changeset
222
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
223 def buildItemDataString(self):
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
224 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
225 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
226
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
227 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
228 "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
229 contain ", " or newlines.
2030
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
230
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
231 @return persistence data (string)
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
232 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
233 return ""
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
234
2034
8de0fc1f7fef Implemented functions to load UML graphics from disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
235 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
236 """
db11a2fe9bbc Implemented functions to save the UML graphics to disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 1509
diff changeset
237 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
238
2034
8de0fc1f7fef Implemented functions to load UML graphics from disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
239 @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
240 @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
241 @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
242 """
2034
8de0fc1f7fef Implemented functions to load UML graphics from disc.
Detlev Offenbach <detlev@die-offenbachs.de>
parents: 2033
diff changeset
243 return True

eric ide

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