/
graphwidget.py
198 lines (163 loc) · 6.83 KB
/
graphwidget.py
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from PyQt4 import *
from node import *
from edge import *
import math, random, hashlib, logging as l, db
l.basicConfig(format='[File "%(filename)s" line %(lineno)d - %(funcName)s - %(levelname)s] %(message)s', \
level=l.INFO)
SOCK_EDGE = 10
class GraphWidget(QtGui.QGraphicsView):
procdict = {}
filedict = {}
sockdict = {}
nodepos = {}
def __init__(self, parent):
super(GraphWidget, self).__init__()
self.timerId = 0
scene = QtGui.QGraphicsScene(self)
scene.setItemIndexMethod(QtGui.QGraphicsScene.NoIndex)
scene.setSceneRect(-200, -200, 400, 400)
self.setScene(scene)
self.setCacheMode(QtGui.QGraphicsView.CacheBackground)
self.setViewportUpdateMode(QtGui.QGraphicsView.BoundingRectViewportUpdate)
self.setRenderHint(QtGui.QPainter.Antialiasing)
self.setTransformationAnchor(QtGui.QGraphicsView.AnchorUnderMouse)
self.setResizeAnchor(QtGui.QGraphicsView.AnchorViewCenter)
self.scale(0.8, 0.8)
self.setMinimumSize(400, 400)
self.setWindowTitle("Elastic Nodes")
def setCallback(self, app):
self.app = app
def addNode(self, node):
self.scene().addItem(node)
try:
node.setPos(self.nodepos[node.dbid])
except KeyError:
node.setPos(random.randint(-self.width()/2, self.width()/2), \
random.randint(-self.height()/2, self.height()/2))
def addProcNode(self, pid, label, info):
node = ProcessNode(self, pid, label, info)
self.procdict[pid] = node
self.addNode(node)
def addProcEdge(self, pid1, pid2, rel):
try:
node1 = self.procdict[pid1]
node2 = self.procdict[pid2]
self.scene().addItem(Edge(node1, node2, rel))
except KeyError:
print "Error: cannot find pid %s or %s\n" % (pid1, pid2)
def setCenterNode(self, pid):
if pid != None:
self.centerNode = self.procdict[pid]
self.centerNode.setPos(0, 0)
def addFileNode(self, fname, label, info):
node = FileNode(self, fname, label, info)
self.filedict[fname] = node
self.addNode(node)
def addFileEdge(self, pid, fname, action):
pnode = self.procdict[pid]
fnode = self.filedict[fname]
self.scene().addItem(Edge(pnode, fnode, action))
def addSockNode(self, sock, info):
node = SocketNode(self, sock, sock, info)
self.sockdict[sock] = node
self.addNode(node)
def addConnectEdge(self, pid, sock):
pnode = self.procdict[pid]
snode = self.sockdict[sock]
self.scene().addItem(Edge(pnode, snode, SOCK_EDGE))
def addAcceptEdge(self, pid, sock):
try:
pnode = self.procdict[pid]
snode = self.sockdict[sock]
self.scene().addItem(Edge(snode, pnode, SOCK_EDGE))
except KeyError:
l.warn('%s:\n %s', pid, db.getIpInfo(sock))
def itemMoved(self):
if not self.timerId:
self.timerId = self.startTimer(1000 / 25)
def keyPressEvent(self, event):
key = event.key()
if key == QtCore.Qt.Key_Up:
self.centerNode.moveBy(0, -20)
elif key == QtCore.Qt.Key_Down:
self.centerNode.moveBy(0, 20)
elif key == QtCore.Qt.Key_Left:
self.centerNode.moveBy(-20, 0)
elif key == QtCore.Qt.Key_Right:
self.centerNode.moveBy(20, 0)
elif key == QtCore.Qt.Key_Plus:
self.scaleView(1.2)
elif key == QtCore.Qt.Key_Minus:
self.scaleView(1 / 1.2)
elif key == QtCore.Qt.Key_Space or key == QtCore.Qt.Key_Enter:
for item in self.scene().items():
if isinstance(item, Node):
item.setPos(-150 + QtCore.qrand() % 300, -150 + QtCore.qrand() % 300)
else:
super(GraphWidget, self).keyPressEvent(event)
def timerEvent(self, event):
nodes = [item for item in self.scene().items() if isinstance(item, Node)]
if len(nodes) > 100:
self.killTimer(self.timerId)
self.timerId = 0
return
for node in nodes:
if node != self.centerNode:
node.calculateForces()
itemsMoved = False
for node in nodes:
if node.advance():
itemsMoved = True
if not itemsMoved:
self.killTimer(self.timerId)
self.timerId = 0
def wheelEvent(self, event):
self.scaleView(math.pow(2.0, -event.delta() / 240.0))
def drawBackground(self, painter, rect):
# Shadow.
sceneRect = self.sceneRect()
rightShadow = QtCore.QRectF(sceneRect.right(), sceneRect.top() + 5, 5,
sceneRect.height())
bottomShadow = QtCore.QRectF(sceneRect.left() + 5, sceneRect.bottom(),
sceneRect.width(), 5)
if rightShadow.intersects(rect) or rightShadow.contains(rect):
painter.fillRect(rightShadow, QtCore.Qt.darkGray)
if bottomShadow.intersects(rect) or bottomShadow.contains(rect):
painter.fillRect(bottomShadow, QtCore.Qt.darkGray)
# Fill.
#~ gradient = QtGui.QLinearGradient(sceneRect.topLeft(),
#~ sceneRect.bottomRight())
#~ gradient.setColorAt(0, QtCore.Qt.white)
#~ gradient.setColorAt(1, QtCore.Qt.lightGray)
#~ painter.fillRect(rect.intersect(sceneRect), QtGui.QBrush(gradient))
#~ painter.setBrush(QtCore.Qt.NoBrush)
#~ painter.drawRect(sceneRect)
# Text.
"""textRect = QtCore.QRectF(sceneRect.left() + 4, sceneRect.top() + 4,
sceneRect.width() - 4, sceneRect.height() - 4)
message = "Click and drag the nodes around, and zoom with the " \
"mouse wheel or the '+' and '-' keys"
font = painter.font()
font.setBold(True)
font.setPointSize(14)
painter.setFont(font)
painter.setPen(QtCore.Qt.lightGray)
painter.drawText(textRect.translated(2, 2), message)
painter.setPen(QtCore.Qt.black)
painter.drawText(textRect, message)"""
def scaleView(self, scaleFactor):
factor = self.matrix().scale(scaleFactor, scaleFactor).mapRect(QtCore.QRectF(0, 0, 1, 1)).width()
if factor < 0.07 or factor > 100:
return
self.scale(scaleFactor, scaleFactor)
def resizeEvent(self, event):
w = self.width() * 1.2
h = self.height() * 1.2
self.scene().setSceneRect(-w/2, -h/2, w, h)
def clear(self):
# save current position
nodes = [item for item in self.scene().items() if isinstance(item, Node)]
for node in nodes:
if node != self.centerNode:
self.nodepos[node.dbid] = node.pos()
self.scene().clear()