def __init__(self, world):
QGraphicsPolygonItem.__init__(self)
#############################
### Build graph
#############################
graph = pydot.Dot()
graph.set_node_defaults(color = 'red', fontcolor = 'red', label = '\<orphan\>')
graph.set('overlap', 'prism')
# build adjacency graph from world
for area in world.areas:
# create node for each room
node = pydot.Node(area.id)
node.set( 'label', area.name )
if area == world.player.currentArea:
node.set( 'color', 'blue' )
node.set( 'fontcolor', 'blue' )
else:
node.set( 'color', 'black' )
node.set( 'fontcolor', 'black' )
graph.add_node(node)
# link to adjacent rooms
for feature in area.features:
for action in feature.actions:
finalEvent = None
for event in action.events:
if type(event) == events.PlayerMoveEvent:
finalEvent = pydot.Edge( src=area.id, dst=event.properties['destination'] )
if finalEvent is not None:
graph.add_edge( finalEvent )
################################
### Generate SVG from graph
################################
ps = graph.create_svg(prog='neato')
#########################################
### Build graphics items from SVG
#########################################
# build xml tree
ns = {'svg': 'http://www.w3.org/2000/svg'}
doc = ET.fromstring(ps)
# grab the root node properties
rootNode = doc.xpath('/svg:svg/svg:g[1]', namespaces=ns)[0]
polygon = rootNode.xpath('./svg:polygon', namespaces=ns)[0]
pointStr = polygon.xpath('./@points', namespaces=ns)[0]
penColor = QString(polygon.xpath('./@stroke', namespaces=ns)[0])
fillColor = QString(polygon.xpath('./@fill', namespaces=ns)[0])
# parse root polygon path
path = QPolygonF()
for pair in pointStr.split(' '):
dims = pair.split(',')
point = QPointF( float(dims[0]), float(dims[1]) )
path.append(point)
self.setPolygon(path)
# fill in root node colors
if QColor.isValidColor(penColor):
self.setPen( QColor(penColor) )
if QColor.isValidColor(fillColor):
self.setBrush( QColor(fillColor) )
# build each graph node
for xmlNode in rootNode.xpath('./svg:g', namespaces=ns):
group = QGraphicsRectItem(self)
group.setPen( Qt.transparent )
group.setBrush( Qt.transparent )
if xmlNode.attrib['class'] == 'node':
# find the area object
name = xmlNode.xpath('./svg:title', namespaces=ns)[0].text
group.setData( 0, QString(world.areas[world.areaLookup[name]].id) )
# get the ellipse info
ellipseNode = xmlNode.xpath('./svg:ellipse', namespaces=ns)[0]
elProps = { k: float(ellipseNode.attrib[k]) for k in ['cx', 'cy', 'rx', 'ry']}
rect = QRectF( elProps['cx']-elProps['rx'], elProps['cy']-elProps['ry'], 2*elProps['rx'], 2*elProps['ry'])
penColor = QString(ellipseNode.attrib['stroke'])
ellipseItem = QGraphicsEllipseItem(rect, group)
if QColor.isValidColor(penColor):
ellipseItem.setPen( QColor(penColor) )
# get the text info
textNode = xmlNode.xpath('./svg:text', namespaces=ns)[0]
text = textNode.text
textItem = QGraphicsTextItem(text, group)
penColor = textNode.attrib.get('fill', 'black')
nodePoint = QPointF(float(textNode.attrib['x']), float(textNode.attrib['y']))
textItem.setPos( nodePoint - textItem.boundingRect().center() + QPointF(0.0,-4.0))
if QColor.isValidColor(penColor):
textItem.setDefaultTextColor( QColor(penColor) )
group.setRect( ellipseItem.boundingRect() )
group.setFlags( QGraphicsRectItem.ItemIsSelectable )
elif xmlNode.attrib['class'] == 'edge':
# parse the line portion of the arrow
line = xmlNode.xpath('./svg:path', namespaces=ns)[0]
path = QPainterPath()
# pull info from xml file
linePath = line.attrib['d']
lineColor = line.attrib['stroke']
# parse path coords
points = re.findall( '(-?\d+\.\d+),(-?\d+\.\d+)', linePath )
if len(points) != 4:
continue
startPoint = QPointF( float(points[0][0]), float(points[0][1]) )
path.moveTo(startPoint)
curvePoints = []
for pointCoord in points[1:]:
curvePoints.append( QPointF(float(pointCoord[0]), float(pointCoord[1])) )
path.cubicTo( curvePoints[0], curvePoints[1], curvePoints[2] )
# construct path item
pathItem = QGraphicsPathItem(path, group)
if QColor.isValidColor(lineColor):
pathItem.setPen( QColor(lineColor) )
polyNode = xmlNode.xpath('./svg:polygon', namespaces=ns)[0]
# pull info from xml file
pointStr = polyNode.xpath('./@points', namespaces=ns)[0]
penColor = QString(polyNode.xpath('./@stroke', namespaces=ns)[0])
fillColor = QString(polyNode.xpath('./@fill', namespaces=ns)[0])
# parse polygon path
path = QPolygonF()
for pair in pointStr.split(' '):
dims = pair.split(',')
point = QPointF( float(dims[0]), float(dims[1]) )
path.append(point)
# construct polygon item
polygonItem = QGraphicsPolygonItem(path, group)
if QColor.isValidColor(penColor):
polygonItem.setPen( QColor(penColor) )
if QColor.isValidColor(fillColor):
polygonItem.setBrush( QColor(fillColor) )
group.setRect( pathItem.boundingRect() and polygonItem.boundingRect() )
