--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Graphics/UMLClassDiagram.py Mon Dec 28 16:03:33 2009 +0000
@@ -0,0 +1,263 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2007 - 2009 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a dialog showing a UML like class diagram.
+"""
+
+from PyQt4.QtCore import *
+from PyQt4.QtGui import *
+
+import Utilities.ModuleParser
+
+from UMLDialog import UMLDialog
+from ClassItem import ClassItem, ClassModel
+from AssociationItem import AssociationItem, Generalisation
+import GraphicsUtilities
+
+class UMLClassDiagram(UMLDialog):
+ """
+ Class implementing a dialog showing a UML like class diagram.
+ """
+ def __init__(self, file, parent = None, name = None, noAttrs = False):
+ """
+ Constructor
+
+ @param file filename of a python module to be shown (string)
+ @param parent parent widget of the view (QWidget)
+ @param name name of the view widget (string)
+ @keyparam noAttrs flag indicating, that no attributes should be shown (boolean)
+ """
+ self.file = file
+ self.noAttrs = noAttrs
+
+ UMLDialog.__init__(self, self.file, parent)
+
+ if not name:
+ self.setObjectName("UMLClassDiagram")
+ else:
+ self.setObjectName(name)
+
+ self.allClasses = {}
+ self.allModules = {}
+
+ self.connect(self.umlView, SIGNAL("relayout()"), self.relayout)
+
+ def __getCurrentShape(self, name):
+ """
+ Private method to get the named shape.
+
+ @param name name of the shape (string)
+ @return shape (QGraphicsItem)
+ """
+ return self.allClasses.get(name)
+
+ def __buildClasses(self):
+ """
+ Private method to build the class shapes of the class diagram.
+
+ The algorithm is borrowed from Boa Constructor.
+ """
+ try:
+ module = Utilities.ModuleParser.readModule(self.file)
+ except ImportError:
+ ct = QGraphicsTextItem(None, self.scene)
+ ct.setHtml(\
+ self.trUtf8("The module <b>'{0}'</b> could not be found.")
+ .format(self.file))
+ return
+
+ if not self.allModules.has_key(self.file):
+ self.allModules[self.file] = []
+
+ routes = []
+ nodes = []
+ todo = [module.createHierarchy()]
+ classesFound = False
+ while todo:
+ hierarchy = todo[0]
+ for className in hierarchy:
+ classesFound = True
+ cw = self.__getCurrentShape(className)
+ if not cw and className.find('.') >= 0:
+ cw = self.__getCurrentShape(className.split('.')[-1])
+ if cw:
+ self.allClasses[className] = cw
+ if className not in self.allModules[self.file]:
+ self.allModules[self.file].append(className)
+ if cw and cw.noAttrs != self.noAttrs:
+ cw = None
+ if cw and not (cw.external and \
+ (className in module.classes or
+ className in module.modules)
+ ):
+ if cw.scene() != self.scene:
+ self.scene.addItem(cw)
+ cw.setPos(10, 10)
+ if className not in nodes:
+ nodes.append(className)
+ else:
+ if className in module.classes:
+ # this is a local class (defined in this module)
+ self.__addLocalClass(\
+ className, module.classes[className], 0, 0)
+ elif className in module.modules:
+ # this is a local module (defined in this module)
+ self.__addLocalClass(\
+ className, module.modules[className], 0, 0, True)
+ else:
+ self.__addExternalClass(className, 0, 0)
+ nodes.append(className)
+
+ if hierarchy.get(className):
+ todo.append(hierarchy.get(className))
+ children = hierarchy.get(className).keys()
+ for child in children:
+ if (className, child) not in routes:
+ routes.append((className, child))
+
+ del todo[0]
+
+ if classesFound:
+ self.__arrangeClasses(nodes, routes[:])
+ self.__createAssociations(routes)
+ else:
+ ct = QGraphicsTextItem(None, self.scene)
+ ct.setHtml(\
+ self.trUtf8("The module <b>'{0}'</b> does not contain any classes.")\
+ .format(self.file))
+
+ def __arrangeClasses(self, nodes, routes, whiteSpaceFactor = 1.2):
+ """
+ Private method to arrange the shapes on the canvas.
+
+ The algorithm is borrowed from Boa Constructor.
+ """
+ generations = GraphicsUtilities.sort(nodes, routes)
+
+ # calculate width and height of all elements
+ sizes = []
+ for generation in generations:
+ sizes.append([])
+ for child in generation:
+ sizes[-1].append(self.__getCurrentShape(child).sceneBoundingRect())
+
+ # calculate total width and total height
+ width = 0
+ height = 0
+ widths = []
+ heights = []
+ for generation in sizes:
+ currentWidth = 0
+ currentHeight = 0
+
+ for rect in generation:
+ if rect.bottom() > currentHeight:
+ currentHeight = rect.bottom()
+ currentWidth = currentWidth + rect.right()
+
+ # update totals
+ if currentWidth > width:
+ width = currentWidth
+ height = height + currentHeight
+
+ # store generation info
+ widths.append(currentWidth)
+ heights.append(currentHeight)
+
+ # add in some whitespace
+ width = width * whiteSpaceFactor
+ rawHeight = height
+ height = height * whiteSpaceFactor - 20
+ verticalWhiteSpace = (height - rawHeight) / (len(generations) - 1.0 or 2.0)
+
+ sceneRect = self.umlView.sceneRect()
+ width += 50.0
+ height += 50.0
+ swidth = width < sceneRect.width() and sceneRect.width() or width
+ sheight = height < sceneRect.height() and sceneRect.height() or height
+ self.umlView.setSceneSize(swidth, sheight)
+
+ # distribute each generation across the width and the
+ # generations across height
+ y = 10.0
+ for currentWidth, currentHeight, generation in \
+ map(None, widths, heights, generations):
+ x = 10.0
+ # whiteSpace is the space between any two elements
+ whiteSpace = (width - currentWidth - 20) / (len(generation) - 1.0 or 2.0)
+ for className in generation:
+ cw = self.__getCurrentShape(className)
+ cw.setPos(x, y)
+ rect = cw.sceneBoundingRect()
+ x = x + rect.width() + whiteSpace
+ y = y + currentHeight + verticalWhiteSpace
+
+ def __addLocalClass(self, className, _class, x, y, isRbModule = False):
+ """
+ Private method to add a class defined in the module.
+
+ @param className name of the class to be as a dictionary key (string)
+ @param _class class to be shown (ModuleParser.Class)
+ @param x x-coordinate (float)
+ @param y y-coordinate (float)
+ @param isRbModule flag indicating a Ruby module (boolean)
+ """
+ meths = sorted(_class.methods.keys())
+ attrs = sorted(_class.attributes.keys())
+ name = _class.name
+ if isRbModule:
+ name = "%s (Module)" % name
+ cl = ClassModel(name, meths[:], attrs[:])
+ cw = ClassItem(cl, False, x, y, noAttrs = self.noAttrs, scene = self.scene)
+ self.allClasses[className] = cw
+ if _class.name not in self.allModules[self.file]:
+ self.allModules[self.file].append(_class.name)
+
+ def __addExternalClass(self, _class, x, y):
+ """
+ Private method to add a class defined outside the module.
+
+ If the canvas is too small to take the shape, it
+ is enlarged.
+
+ @param _class class to be shown (string)
+ @param x x-coordinate (float)
+ @param y y-coordinate (float)
+ """
+ cl = ClassModel(_class)
+ cw = ClassItem(cl, True, x, y, noAttrs = self.noAttrs, scene = self.scene)
+ self.allClasses[_class] = cw
+ if _class not in self.allModules[self.file]:
+ self.allModules[self.file].append(_class)
+
+ def __createAssociations(self, routes):
+ """
+ Private method to generate the associations between the class shapes.
+
+ @param routes list of relationsships
+ """
+ for route in routes:
+ if len(route) > 1:
+ assoc = AssociationItem(\
+ self.__getCurrentShape(route[1]),
+ self.__getCurrentShape(route[0]),
+ Generalisation)
+ self.scene.addItem(assoc)
+
+ def show(self):
+ """
+ Overriden method to show the dialog.
+ """
+ self.__buildClasses()
+ UMLDialog.show(self)
+
+ def relayout(self):
+ """
+ Public method to relayout the diagram.
+ """
+ self.allClasses.clear()
+ self.allModules.clear()
+ self.__buildClasses()
