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以下のグラフの各エッジにラベルを追加しようとしています。

ここに画像の説明を入力

基本的に、中央の各エッジにラベルを付けた上記:

ここに画像の説明を入力

次のように、各グラフにエッジを追加するときにラベルを追加しようとしました(グラフの場合g):

g.add_edge(... label=edge.distance ...)

いくつかの調査の後、Mac でのみ機能する Nodebox 1 でそのようなラベル付けが可能であることがわかりました。ドキュメントからNodebox-OpenGLに適した代替手段はないようです。私が受け取るエラー:

Traceback (most recent call last):
  File "C:\foo\bar\baz\Imager.py", line 29, in <module>
    g.add_edge(edge.fr, edge.to, length=edge.distance, weight=2, stroke=color(1.0, 0.2, 0.0), label="cheese")
  File "C:\Python27\lib\site-packages\nodebox\graphics\physics.py", line 1254, in add_edge
    e2 = e2(n1, n2, *args, **kwargs)
TypeError: __init__() got an unexpected keyword argument 'label'

問題を再現できます。

from nodebox.graphics import *
from nodebox.graphics.physics import Node, Edge, Graph

# Create a graph with randomly connected nodes.
# Nodes and edges can be styled with fill, stroke, strokewidth parameters.
# Each node displays its id as a text label, stored as a Text object in Node.text.
# To hide the node label, set the text parameter to None.
g = Graph()
# Random nodes.
for i in range(50):
    g.add_node(id=str(i+1), 
        radius = 5,
        stroke = color(0), 
          text = color(0))
# Random edges.
for i in range(75):
    node1 = choice(g.nodes)
    node2 = choice(g.nodes)
    g.add_edge(node1, node2, 
        length = 1.0, 
        weight = random(), 
        stroke = color(0),
        label = "Placeholder")    #!!!!!!!!!!!!! ADDING THE label HERE

# Two handy tricks to prettify the layout:
# 1) Nodes with a higher weight (i.e. incoming traffic) appear bigger.
for node in g.nodes:
    node.radius = node.radius + node.radius*node.weight
# 2) Nodes with only one connection ("leaf" nodes) have a shorter connection.
for node in g.nodes:
    if len(node.edges) == 1:
        node.edges[0].length *= 0.1

g.prune(depth=0)          # Remove orphaned nodes with no connections.
g.distance         = 10   # Overall spacing between nodes.
g.layout.force     = 0.01 # Strength of the attractive & repulsive force.
g.layout.repulsion = 15   # Repulsion radius.

dragged = None
def draw(canvas):

    canvas.clear()
    background(1)
    translate(250, 250)

    # With directed=True, edges have an arrowhead indicating the direction of the connection.
    # With weighted=True, Node.centrality is indicated by a shadow under high-traffic nodes.
    # With weighted=0.0-1.0, indicates nodes whose centrality > the given threshold.
    # This requires some extra calculations.
    g.draw(weighted=0.5, directed=True)
    g.update(iterations=10)

    # Make it interactive!
    # When the mouse is pressed, remember on which node.
    # Drag this node around when the mouse is moved.
    dx = canvas.mouse.x - 250 # Undo translate().
    dy = canvas.mouse.y - 250
    global dragged
    if canvas.mouse.pressed and not dragged:
        dragged = g.node_at(dx, dy)
    if not canvas.mouse.pressed:
        dragged = None
    if dragged:
        dragged.x = dx
        dragged.y = dy

canvas.size = 500, 500
canvas.run(draw)

Nodebox-OpenGL でグラフのエッジにラベルを追加するにはどうすればよいでしょうか?

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1 に答える 1

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ソースでわかるように、には引数がありませlabeladd_edge。( を検索class Edge(object):)

私が見ることができる最善の方法は、公式のクラスから派生した独自のクラスを作成することですMyEdgeEdgelabel

txt = Text(str, x=0, y=0, width=None, height=None)

また

textpath(string, x=0, y=0, fontname=None, fontsize=None, fontweight=None)

draw() メソッドで。

編集add_edge方法のdocstring に注意してください:

def add_edge(self, id1, id2, *args, **kwargs):
    """ Appends a new Edge to the graph.
        An optional base parameter can be used to pass a subclass of Edge:
        Graph.add_edge("cold", "winter", base=IsPropertyOf)
    """
于 2013-11-22T07:42:19.527 に答える