Exemplo n.º 1
0
    def __create__(self):

        self.__gridSize = 35

        self.__isGridActive = True
        self.__isAltModifier = False
        self.__isControlModifier = False
        self.__isNodePressed = False

        self.__kDummy = EDummy()
        self.__kDummy.setGridSize(self.__gridSize)
        self.__kDummy.onPress.connect(self.__onNodePressed)
        self.__kDummy.onEditEnd.connect(self.__onDummyEdit)

        self.addItem(self.__kDummy)

        self.__kSelected = ESceneSelection()

        self.addItem(self.__kSelected)

        self.__kCutLine = QGraphicsLineItem()
        self.__kCutLine.hide()

        self.addItem(self.__kCutLine)

        self.__nodes = {}
        self.__connections = {}

        self.__graphHandle = EGraphHandle()
        self.__graphHandle.Message.connect(self.__messageFilter)

        self.__propEditor = EPropertyEditor()
        self.addItem(self.__propEditor)
Exemplo n.º 2
0
    def __create__(self):

        self.__gridSize = 35

        self.__isGridActive = True
        self.__isAltModifier = False
        self.__isControlModifier = False

        self.__kDummy = EDummy()
        self.__kDummy.setGridSize(self.__gridSize)
        self.__kDummy.onPress.connect(self.__onNodePressed)

        self.addItem(self.__kDummy)

        self.__nodes = {}
        self.__connections = {}

        self.__graphHandle = EGraphHandle()
        self.__graphHandle.Message.connect(self.__messageFilter)
Exemplo n.º 3
0
Arquivo: escene.py Projeto: kishxn/edd
    def __init__(self, view, controller, parent=None):
        QGraphicsScene.__init__(self, parent)

        self.__view = view
        self.__controller = controller
        self.__controller.setScene(self)
        self.__controller.Handle.Message.connect(self.__messageFilter)
        self.__controller.Message.connect(self.__messageFilter)

        self.__gridSize = 35

        self.__isEditMode = False

        self.__isGridActive = True
        self.__isAltModifier = False
        self.__isControlModifier = False
        self.__isNodePressed = False

        self.__kDummy = EDummy()
        self.__kDummy.setGridSize(self.__gridSize)
        self.__kDummy.onMouseClick.connect(self.__onDummyMouseClick)
        self.__kDummy.onMouseGesture.connect(self.__onDummyMouseGesture)

        self.__kDummy.hide()

        self.addItem(self.__kDummy)

        self.__kSelected = ESceneSelection()

        self.addItem(self.__kSelected)

        self.__kCutLine = QGraphicsLineItem()
        self.__kCutLine.hide()

        self.__dummyHead = EDummyData()
        self.__dummyTail = EDummyData()
        self.__dummyHead.hide()
        self.__dummyTail.hide()

        self.__kConnectionDummy = EEdge(self.__dummyHead.data(), self.__dummyTail.data(), uuid.uuid1(), True)
        self.__kConnectionDummy.hide()

        self.addItem(self.__kConnectionDummy)
        self.addItem(self.__kCutLine)
        self.addItem(self.__dummyHead)
        self.addItem(self.__dummyTail)

        self.__nodes = {}
        self.__defaultNodeNames = {}
        self.__userNodeNames = {}
        self.__connections = {}

        self.__pressedAttributes = None
        self.__kSelected.Item = None
Exemplo n.º 4
0
Arquivo: escene.py Projeto: kishxn/edd
class EScene(QGraphicsScene):

    onSelectionChanged = pyqtSignal(type)

    def __init__(self, view, controller, parent=None):
        QGraphicsScene.__init__(self, parent)

        self.__view = view
        self.__controller = controller
        self.__controller.setScene(self)
        self.__controller.Handle.Message.connect(self.__messageFilter)
        self.__controller.Message.connect(self.__messageFilter)

        self.__gridSize = 35

        self.__isEditMode = False

        self.__isGridActive = True
        self.__isAltModifier = False
        self.__isControlModifier = False
        self.__isNodePressed = False

        self.__kDummy = EDummy()
        self.__kDummy.setGridSize(self.__gridSize)
        self.__kDummy.onMouseClick.connect(self.__onDummyMouseClick)
        self.__kDummy.onMouseGesture.connect(self.__onDummyMouseGesture)

        self.__kDummy.hide()

        self.addItem(self.__kDummy)

        self.__kSelected = ESceneSelection()

        self.addItem(self.__kSelected)

        self.__kCutLine = QGraphicsLineItem()
        self.__kCutLine.hide()

        self.__dummyHead = EDummyData()
        self.__dummyTail = EDummyData()
        self.__dummyHead.hide()
        self.__dummyTail.hide()

        self.__kConnectionDummy = EEdge(self.__dummyHead.data(), self.__dummyTail.data(), uuid.uuid1(), True)
        self.__kConnectionDummy.hide()

        self.addItem(self.__kConnectionDummy)
        self.addItem(self.__kCutLine)
        self.addItem(self.__dummyHead)
        self.addItem(self.__dummyTail)

        self.__nodes = {}
        self.__defaultNodeNames = {}
        self.__userNodeNames = {}
        self.__connections = {}

        self.__pressedAttributes = None
        self.__kSelected.Item = None

    def __isNode(self, EObject):
        return isinstance(EObject, ENode)

    def __isEdge(self, EObject):
        return isinstance(EObject, EEdge)

    def __onDummyMouseClick(self):

        if self.__isNode(self.sender()):

            pressedId, pressedPlug = self.sender().mapFromPoint(self.__kDummy.scenePos())

            if not self.__nodes.has_key(pressedId):

                self.__pressedAttributes = pressedId

                self.sender().setFlag(QGraphicsItem.ItemIsMovable, False)

                self.__dummyHead.setPos(pressedPlug)

                if self.sender().Handle.IsContainer:
                    self.__dummyTail.Polygon = self.sender().Polygon

                    self.__kConnectionDummy.Head = self.__dummyHead.data()
                    self.__kConnectionDummy.Tail = self.__dummyTail.data()

                    if self.__controller.Handle.getAttributeFromId(pressedId).Type.matches(EAttribute.kTypeInput):
                        self.__kConnectionDummy.Tail = self.__dummyHead.data()
                        self.__kConnectionDummy.Head = self.__dummyTail.data()

                self.sender().mute(pressedId)

                self.__kConnectionDummy.update()
                self.__kConnectionDummy.show()

            self.__kSelected.Item = self.sender()

            dataBlock = type("EData", (EObject,), {'nodeName': self.__kSelected.Item.Name,
                                                   'nodeProperties': self.__kSelected.Item.Handle.lsProperties()})
            self.onSelectionChanged.emit(dataBlock)

    def __onDummyMouseGesture(self, line):

        if self.__isNode(self.itemAt(line.p1())) and self.__isNode(self.itemAt(line.p2())):
            return

        self.__kCutLine.setLine(line)

        data = [item for item in self.__kCutLine.collidingItems() if isinstance(item, EEdge) or isinstance(item, ENode)]

        if len(data):
            self.__isEditMode = True

            for item in data:
                if isinstance(item, EEdge):
                    if self.__kCutLine.collidesWithPath(item.shape()):
                        self.__controller.Handle.delConnection(item.Id)

                elif isinstance(item, ENode):
                    self.__controller.deleteNode(item.Id)
        else:
            self.__isEditMode = False

    def __getDataFromId(self, theId):
        handle = self.__controller.Handle.getAttributeHandleId(theId)

        if handle:
            return self.__nodes[handle].mapFromId(theId)

        return None

    def __messageFilter(self, message):

        if message.matches(EController.kMessageNodeAdded):

            handle, name = message.getData()

            if not name:
                name = None

            if handle.IsContainer:
                newNode = EPoint(handle)
            else:
                newNode = ENode(handle)

            newNode.setPos(self.__kDummy.scenePos())

            self.addItem(newNode, name)

            self.__kSelected.Item = newNode

        if message.matches(EController.kMessageNodeRemoved):
            self.removeItem(self.__nodes[message.getData()])
            self.__nodes.pop(message.getData(), None)
            return

        if message.matches(EController.kMessageConnectionMade):

            if not len(message.getData()):
                return

            dataOne = self.__getDataFromId(message.getData()[0])
            dataTwo = self.__getDataFromId(message.getData()[1])

            if dataOne and dataTwo:
                if any([isinstance(dataOne[ENode.kGuiAttributeParent], EPoint),
                        isinstance(dataTwo[ENode.kGuiAttributeParent], EPoint)]):

                    conn = EEdge(dataOne, dataTwo, message.getData()[2], True)

                    dataOne[ENode.kGuiAttributeParent].togglePlug(message.getData()[0])
                    dataTwo[ENode.kGuiAttributeParent].togglePlug(message.getData()[1])

                else:
                    conn = EEdge(dataOne, dataTwo, message.getData()[2])

                self.__connections[conn.Id] = conn
                self.addItem(conn)

            return

        if message.matches(EGraphHandle.kMessageConnectionBroke):
            if message.getData() in self.__connections.keys():

                connHead = self.__connections[message.getData()].Head#[ENode.kGuiAttributeId]
                connTail = self.__connections[message.getData()].Tail#[ENode.kGuiAttributeId]

                self.removeItem(self.__connections[message.getData()])

                self.__connections.pop(message.getData(), None)

                self.update()
            return

    @property
    def IsEditMode(self):
        return self.__isEditMode

    def getNodes(self):
        return self.__nodes

    def getConnections(self):
        return self.__connections

    def addItem(self, graphicsItem, graphicsItemName=None):

        if self.__isNode(graphicsItem):
            graphicsItem.setZValue(1.0)
            graphicsItem.onPress.connect(self.__onDummyMouseClick)

            if graphicsItemName is None:
                graphicsItemName = graphicsItem.Name

                if self.__defaultNodeNames.has_key(graphicsItemName):
                    self.__defaultNodeNames[graphicsItemName] += 1
                else:
                    self.__defaultNodeNames[graphicsItemName] = 1

                graphicsItem.Name = "%s_%s" % (graphicsItemName, self.__defaultNodeNames[graphicsItemName])

            else:
                if self.__userNodeNames.has_key(graphicsItemName):
                    print graphicsItemName.split('_')

                graphicsItem.Name = graphicsItemName
                self.__userNodeNames[graphicsItemName] = 1

            self.__nodes[graphicsItem.Id] = graphicsItem

        QGraphicsScene.addItem(self, graphicsItem)

    def drawBackground(self, painter, rect):
        self.update()

        if self.__isGridActive:

            painter.setPen(Qt.NoPen)
            painter.fillRect(rect, EDraw.EColor.DefaultSceneFillColor)

            left = int(rect.left()) - (int(rect.left()) % self.__gridSize)
            top = int(rect.top()) - (int(rect.top()) % self.__gridSize)
            lines = []
            right = int(rect.right())
            bottom = int(rect.bottom())
            for x in range(left, right, self.__gridSize):
                lines.append(QLineF(x, rect.top(), x, rect.bottom()))
            for y in range(top, bottom, self.__gridSize):
                lines.append(QLineF(rect.left(), y, rect.right(), y))

            painter.setPen(QPen(EDraw.EColor.DefaultSceneGridColor, 1, Qt.SolidLine))
            painter.drawLines(lines)
            return

        painter.fillRect(rect, EDraw.EColor.DefaultSceneFillColor)

    def contextMenuEvent(self, mouseEvent):
        QGraphicsScene.contextMenuEvent(self, mouseEvent)

    def mouseMoveEvent(self, mouseEvent):
        QGraphicsScene.mouseMoveEvent(self, mouseEvent)

        self.__kDummy.setPos(mouseEvent.scenePos())

        if self.__kDummy.IsSnapMode:
            if self.__kSelected.Item:
                #self.__kSelected.Item.setPos(self.__kDummy.Position)
                #self.__kSelected.Item.onMove.emit()
                pass

        self.__dummyTail.setPos(mouseEvent.scenePos())
        self.__kConnectionDummy.update()

        self.update()

    def mousePressEvent(self, mouseEvent):

        for node in self.__nodes.itervalues():
            node.setZValue(1.0)

        if self.__isControlModifier:
            return

        if self.__isAltModifier:
            self.__kDummy.ToggleEditMode()
            return

        if not self.itemAt(mouseEvent.scenePos()):
            self.__kSelected.Item = None
            self.onSelectionChanged.emit(type("EData", (EObject,), {'nodeName': '', 'nodeProperties': []}))

        if mouseEvent.button() == Qt.RightButton:
            if self.__isNode(self.itemAt(mouseEvent.scenePos())):
                self.__isNodePressed = True
                self.__kDummy.ToggleEditMode()
                return

        QGraphicsScene.mousePressEvent(self, mouseEvent)

    def mouseReleaseEvent(self, mouseEvent):

        if self.__isAltModifier:
            self.__kDummy.ToggleEditMode()
            self.update()
            return

        if mouseEvent.button() == Qt.RightButton:
            if self.__isNodePressed:
                self.__isNodePressed = False
                self.__kDummy.ToggleEditMode()
                return

        if self.__kSelected.Item:
            self.__kSelected.Item.setFlag(QGraphicsItem.ItemIsMovable, True)
            self.__kConnectionDummy.hide()
            self.__kSelected.Item.mute(None)

            if isinstance(self.itemAt(mouseEvent.scenePos()), ENode):
                hitId, hitPoint = self.itemAt(mouseEvent.scenePos()).mapFromPoint(mouseEvent.scenePos())

                self.__controller.connectAttr(self.__pressedAttributes, hitId)

        self.update()

        QGraphicsScene.mouseReleaseEvent(self, mouseEvent)

    def keyPressEvent(self, keyEvent):
        QGraphicsScene.keyPressEvent(self, keyEvent)

        if keyEvent.key() == Qt.Key_Control:
            self.__view.setDragMode(QGraphicsView.ScrollHandDrag)
            self.__isControlModifier = True

        if keyEvent.key() == Qt.Key_Alt:
            self.__isAltModifier = True

        if keyEvent.key() == 88:
            self.__kDummy.IsSnapMode = True
            self.__kDummy.show()

        if keyEvent.key() == Qt.Key_Tab:
            print 'Tab, Tab..'

    def keyReleaseEvent(self, keyEvent):
        QGraphicsScene.keyReleaseEvent(self, keyEvent)

        if keyEvent.key() == Qt.Key_Control:
            self.__view.setDragMode(QGraphicsView.NoDrag)
            self.__isControlModifier = False

        if keyEvent.key() == Qt.Key_Alt:
            self.__isAltModifier = False

        if keyEvent.key() == 88:
            self.__kDummy.IsSnapMode = False
            self.__kDummy.hide()

        if keyEvent.key() == Qt.Key_Tab:
            print 'Tab, Tab..'
Exemplo n.º 5
0
class EScene(QGraphicsScene):

    def __init__(self, view=None, parent=None):
        QGraphicsScene.__init__(self, parent)

        if view is None:
            raise AttributeError

        self.__view = view
        self.__create__()

    def __create__(self):

        self.__gridSize = 35

        self.__isGridActive = True
        self.__isAltModifier = False
        self.__isControlModifier = False
        self.__isNodePressed = False

        self.__kDummy = EDummy()
        self.__kDummy.setGridSize(self.__gridSize)
        self.__kDummy.onPress.connect(self.__onNodePressed)
        self.__kDummy.onEditEnd.connect(self.__onDummyEdit)

        self.addItem(self.__kDummy)

        self.__kSelected = ESceneSelection()

        self.addItem(self.__kSelected)

        self.__kCutLine = QGraphicsLineItem()
        self.__kCutLine.hide()

        self.addItem(self.__kCutLine)

        self.__nodes = {}
        self.__connections = {}

        self.__graphHandle = EGraphHandle()
        self.__graphHandle.Message.connect(self.__messageFilter)

        self.__propEditor = EPropertyEditor()
        self.addItem(self.__propEditor)

    def __isNode(self, EObject):
        return isinstance(EObject, ENode)

    def __isEdge(self, EObject):
        return isinstance(EObject, EEdge)

    def __onNodePressed(self):

        if self.__isNode(self.sender()):
            self.__graphHandle.process(self.sender().mapFromPoint(self.__kDummy.scenePos()))
            return

        if not self.__kDummy.isEditMode():
            self.__graphHandle.process(self.__kDummy.Id)

    def __onDummyEdit(self, line):

        if self.__isNode(self.itemAt(line.p1())) and self.__isNode(self.itemAt(line.p2())):
            return

        self.__kCutLine.setLine(line)

        result = []

        for item in self.__kCutLine.collidingItems():
            if isinstance(item, EEdge):

                if self.__kCutLine.collidesWithPath(item.shape()):
                    result.append(item.Id)

        self.__graphHandle.process(result)

    def __getDataFromId(self, theId):
        handle = self.__graphHandle.getHandleFromId(theId)
        if handle:
            return self.__nodes[handle].mapFromId(theId)

        return None

    def __messageFilter(self, message):

        if message.match(EGraphHandle.kMessageEditBegin):
            self.__kDummy.toggleEditMode()
            return

        if message.match(EGraphHandle.kMessageEditEnd):
            if self.__kDummy.isEditMode():
                self.__kDummy.toggleEditMode()
            return

        if message.match(EGraphHandle.kMessageNodeAdded):
            self.addItem(ENode(message.getData()))
            return

        if message.match(EGraphHandle.kMessageNodeRemoved):
            return

        if message.match(EGraphHandle.kMessageConnectionMade):

            dataOne = self.__getDataFromId(message.getData()[0])
            dataTwo = self.__getDataFromId(message.getData()[1])

            if dataOne and dataTwo:

                conn = EEdge(dataOne, dataTwo, message.getData()[2])
                self.__connections[conn.Id] = conn
                self.addItem(conn)

                headData = conn.Head
                tailData = conn.Tail

                print 'Result: Connected %s.%s to %s.%s' % (headData[ENode.kGuiAttributeParentName],
                                                            headData[ENode.kGuiAttributeLongName],
                                                            tailData[ENode.kGuiAttributeParentName],
                                                            tailData[ENode.kGuiAttributeLongName])

            return

        if message.match(EGraphHandle.kMessageConnectionBroke):
            if message.getData() in self.__connections.keys():
                self.removeItem(self.__connections[message.getData()])

                self.__connections.pop(message.getData(), None)

                self.update()

                #print "Disconnected..."

            return

        if message.match(EGraphHandle.kMessageUnknown) or message.match(EGraphHandle.kMessageInternalError):
            print 'Result: No event <%s>' % message.getData()
            if self.__kDummy.isEditMode():
                self.__kDummy.toggleEditMode()
                self.update()

    def build(self, handle):
        if not isinstance(handle, EGraphHandle):
            raise AttributeError

    def addItem(self, QGraphicsItem):

        if self.__isNode(QGraphicsItem):
            QGraphicsItem.setZValue(1.0)
            QGraphicsItem.onPress.connect(self.__onNodePressed)

            self.__nodes[QGraphicsItem.Id] = QGraphicsItem

        QGraphicsScene.addItem(self, QGraphicsItem)

    def cwd(self):
        return self.__graphHandle

    def ls(self, sl=False):
        if sl:
            return self.__kSelected

        return self.__nodes.values()

    def drawBackground(self, painter, rect):
        self.update()

        if self.__isGridActive:

            painter.setPen(Qt.NoPen)
            painter.fillRect(rect, Qt.lightGray)

            left = int(rect.left()) - (int(rect.left()) % self.__gridSize)
            top = int(rect.top()) - (int(rect.top()) % self.__gridSize)
            lines = []
            right = int(rect.right())
            bottom = int(rect.bottom())
            for x in range(left, right, self.__gridSize):
                lines.append(QLineF(x, rect.top(), x, rect.bottom()))
            for y in range(top, bottom, self.__gridSize):
                lines.append(QLineF(rect.left(), y, rect.right(), y))

            painter.setPen(QPen(Qt.gray, 1, Qt.SolidLine))
            painter.drawLines(lines)
            return

        painter.fillRect(rect, Qt.lightGray)

    def mouseMoveEvent(self, mouseEvent):
        QGraphicsScene.mouseMoveEvent(self, mouseEvent)

        self.__kDummy.setPos(mouseEvent.scenePos())

        self.update()

    def mousePressEvent(self, mouseEvent):
        QGraphicsScene.mousePressEvent(self, mouseEvent)

        item = self.itemAt(mouseEvent.scenePos())

        if self.__isControlModifier:
            return

        if self.__isNode(item):
            #print item.Properties
            self.__kSelected.Item = item
            self.__propEditor.rebuild(self.__kSelected.Item.Handle.Name, self.__kSelected.Item.Handle.lsProperties())

        elif isinstance(item, EDummy):
            self.__kSelected.Item = None
            self.__propEditor.rebuild("", [])

        if mouseEvent.button() == Qt.RightButton:
            if self.__isNode(self.itemAt(mouseEvent.scenePos())):
                self.__isNodePressed = True
                return

            self.__kDummy.toggleEditMode()

    def mouseReleaseEvent(self, mouseEvent):

        if mouseEvent.button() == Qt.RightButton:
            if self.__isNodePressed:
                self.__isNodePressed = False
                return

            self.__kDummy.toggleEditMode()

        self.update()

        QGraphicsScene.mouseReleaseEvent(self, mouseEvent)

    def keyPressEvent(self, keyEvent):
        QGraphicsScene.keyPressEvent(self, keyEvent)

        if keyEvent.key() == Qt.Key_Control:
            self.__view.setDragMode(QGraphicsView.ScrollHandDrag)
            self.__isControlModifier = True

        if keyEvent.key() == Qt.Key_Alt:
            self.__isAltModifier = True
            self.__previousSelectedNode = None

        if keyEvent.key() == 88:
            self.__kDummy.setSnapMode(True)

    def keyReleaseEvent(self, keyEvent):
        QGraphicsScene.keyReleaseEvent(self, keyEvent)

        if keyEvent.key() == Qt.Key_Control:
            self.__view.setDragMode(QGraphicsView.NoDrag)
            self.__isControlModifier = False

        if keyEvent.key() == Qt.Key_Alt:
            self.__isAltModifier = False
            self.__previousSelectedNode = None

        if keyEvent.key() == 88:
            self.__kDummy.setSnapMode(False)
Exemplo n.º 6
0
class EScene(QGraphicsScene):

    def __init__(self, view=None, parent=None):
        QGraphicsScene.__init__(self, parent)

        if view is None:
            raise AttributeError

        self.__view = view
        self.__create__()

    def __create__(self):

        self.__gridSize = 35

        self.__isGridActive = True
        self.__isAltModifier = False
        self.__isControlModifier = False

        self.__kDummy = EDummy()
        self.__kDummy.setGridSize(self.__gridSize)
        self.__kDummy.onPress.connect(self.__onNodePressed)

        self.addItem(self.__kDummy)

        self.__nodes = {}
        self.__connections = {}

        self.__graphHandle = EGraphHandle()
        self.__graphHandle.Message.connect(self.__messageFilter)

    def __isNode(self, EObject):
        return isinstance(EObject, ENode)

    def __onNodePressed(self):
        if self.__isNode(self.sender()):
            self.__graphHandle.process(self.sender().mapFromPoint(self.__kDummy.scenePos()))
            return

        if not self.__kDummy.isEditMode():
            self.__graphHandle.process(self.__kDummy.Id)

    def __getDataFromId(self, theId):
        handle = self.__graphHandle.getHandleFromId(theId)
        if handle:
            return self.__nodes[handle].mapFromId(theId)

        return None

    def __getResultMessageFromConnection(self, conn):
        return

    def __messageFilter(self, message):

        if message.match(EGraphHandle.kMessageEditBegin):
            #print 'Debug message: Edit begin...'
            self.__kDummy.toggleEditMode()
            return

        if message.match(EGraphHandle.kMessageEditEnd):
            #print 'Debug message: Edit end...'
            if self.__kDummy.isEditMode():
                self.__kDummy.toggleEditMode()
            return

        if message.match(EGraphHandle.kMessageNodeAdded):
            self.addItem(ENode(message.getData()))
            return

        if message.match(EGraphHandle.kMessageNodeRemoved):
            return

        if message.match(EGraphHandle.kMessageConnectionMade):

            dataOne = self.__getDataFromId(message.getData()[0])
            dataTwo = self.__getDataFromId(message.getData()[1])

            if dataOne and dataTwo:

                conn = EEdge(dataOne, dataTwo, message.getData()[2])
                self.__connections[conn.Id] = conn
                self.addItem(conn)

                headData = conn.Head
                tailData = conn.Tail

                print 'Result: Connected %s.%s to %s.%s' % (headData[ENode.kGuiAttributeParentName],
                                                            headData[ENode.kGuiAttributeLongName],
                                                            tailData[ENode.kGuiAttributeParentName],
                                                            tailData[ENode.kGuiAttributeLongName])

            return

        if message.match(EGraphHandle.kMessageConnectionBroke):
            if message.getData() in self.__connections.keys():
                self.removeItem(self.__connections[message.getData()])

                self.__connections.pop(message.getData(), None)

                self.update()

                #print "Disconnected..."

            return

        if message.match(EGraphHandle.kMessageUnknown) or message.match(EGraphHandle.kMessageInternalError):
            print 'No event <%s>' % message.getData()
            if self.__kDummy.isEditMode():
                self.__kDummy.toggleEditMode()
                self.update()

    @property
    def Handle(self):
        return self.__graphHandle

    def build(self, handle):
        if not isinstance(handle, EGraphHandle):
            raise AttributeError

    def addItem(self, QGraphicsItem):

        if self.__isNode(QGraphicsItem):
            QGraphicsItem.setZValue(0.0)
            QGraphicsItem.onPress.connect(self.__onNodePressed)

            self.__nodes[QGraphicsItem.Id] = QGraphicsItem

        QGraphicsScene.addItem(self, QGraphicsItem)

    def cwd(self):
        return self.__graphHandle

    def ls(self):
        return self.__nodes.values()

    def drawBackground(self, painter, rect):
        self.update()

        if self.__isGridActive:

            painter.setPen(Qt.NoPen)
            painter.fillRect(rect, Qt.lightGray)

            left = int(rect.left()) - (int(rect.left()) % self.__gridSize)
            top = int(rect.top()) - (int(rect.top()) % self.__gridSize)
            lines = []
            right = int(rect.right())
            bottom = int(rect.bottom())
            for x in range(left, right, self.__gridSize):
                lines.append(QLineF(x, rect.top(), x, rect.bottom()))
            for y in range(top, bottom, self.__gridSize):
                lines.append(QLineF(rect.left(), y, rect.right(), y))

            painter.setPen(QPen(Qt.gray, 1, Qt.SolidLine))
            painter.drawLines(lines)
            return

        painter.fillRect(rect, Qt.lightGray)

    def mouseMoveEvent(self, mouseEvent):
        QGraphicsScene.mouseMoveEvent(self, mouseEvent)

        self.__kDummy.setPos(mouseEvent.scenePos())

    def mousePressEvent(self, mouseEvent):
        QGraphicsScene.mousePressEvent(self, mouseEvent)

        if self.__isControlModifier:
            return

        if mouseEvent.button() == Qt.RightButton:
            self.__kDummy.toggleEditMode()

    def mouseReleaseEvent(self, mouseEvent):

        if mouseEvent.button() == Qt.RightButton:
            self.__kDummy.toggleEditMode()

        self.update()

        QGraphicsScene.mouseReleaseEvent(self, mouseEvent)

    def keyPressEvent(self, keyEvent):
        QGraphicsScene.keyPressEvent(self, keyEvent)

        if keyEvent.key() == Qt.Key_Control:
            self.__view.setDragMode(QGraphicsView.ScrollHandDrag)
            self.__isControlModifier = True

        if keyEvent.key() == Qt.Key_Alt:
            self.__isAltModifier = True
            self.__previousSelectedNode = None

        if keyEvent.key() == 88:
            self.__kDummy.setSnapMode(True)

    def keyReleaseEvent(self, keyEvent):
        QGraphicsScene.keyReleaseEvent(self, keyEvent)

        if keyEvent.key() == Qt.Key_Control:
            self.__view.setDragMode(QGraphicsView.NoDrag)
            self.__isControlModifier = False

        if keyEvent.key() == Qt.Key_Alt:
            self.__isAltModifier = False
            self.__previousSelectedNode = None

        if keyEvent.key() == 88:
            self.__kDummy.setSnapMode(False)