Cocoa图形库 [英] Graph library for Cocoa

问题描述

有一些图形应用程序有好的库吗？我想要创建节点，添加加权边等...

EDIT

libguide.pdf> GraphViz文档这样应该做布局工作：

   - （void）testGraph { 
 
 Agraph_t * G; 
 GVC_t * gvc; 
 gvc = gvContext（）; 
 
 char * testGraph =\ 
 digraph G {\ 
 subgraph cluster_c0 {a0  - > a1  - > a2  - > a3;} \ 
 subgraph cluster_c1 {b0  - > b1  - > b2  - > b3;} \ 
x  - > a0; \ 
x  - > b0; \ 
 a1  - > a3; \ 
 a3  - > a0; \ 
}; 
 
 G = agmemread（（char *）testGraph）; 
 [self dumpGraph：G]; 
 
 gvLayout（gvc，G，dot）; 
 NSLog（@after layout：）; 
 
 [self dumpGraph：G]; 
 
 gvFreeLayout（gvc，G）; 
 gvFreeContext（gvc）; 
 
} 
 
  - （void）printNode：（Agnode_t *）node {
 NSLog（@Node：％s {{％f，％f} {％f，％f}}，node-> name，
 node-> u.coord.x，
 node-> u.coord.y，
 ND_width节点），
 ND_height（node））; 
} 
 
  - （void）dumpGraph：（Agraph_t *）graph {
 if（！graph）
 return; 
 Agnode_t * n = NULL; 
 Dict_t * dict = graph-> nodes; 
 for（n = dtfirst（dict）; n; n = dtnext（dict，n））{
 [self printNode：n] 
} 
} 
  

而不是使用logNode： 。

日志输出：

  GraphTest [32319：303] ：a0 {{0.000000,0.000000}，{0.000000,0.000000}} 
 GraphTest [32319：303]节点：a1 {{0.000000,0.000000}，{0.000000,0.000000}} 
 GraphTest [32319：303 ] Node：a2 {{0.000000,0.000000}，{0.000000,0.000000}} 
 GraphTest [32319：303]节点：a3 {{0.000000,0.000000}，{0.000000,0.000000}} 
 GraphTest [32319 ：303}节点：b0 {{0.000000,0.000000}，{0.000000,0.000000}} 
 GraphTest [32319：303] [32319：303]节点：b2 {{0.000000,0.000000}，{0.000000,0.000000}} 
 GraphTest [32319：303]节点：b3 {{0.000000,0.000000}，{0.000000,0.000000}} 
 GraphTest [32319：303]节点：x {{0.000000,0.000000}，{0.000000,0.000000}} 
布局后的GraphTest [32319：303]节点：a0 { {83.000000,250.000000}，{0.750000,0.500000}} 
 GraphTest [32319：303]节点：a1 {{63.000000,178.000000}，{0.750000,0.500000}} 
 GraphTest [32319：303] a2 {{43.000000,106.000000}，{0.750000,0.500000}} 
 GraphTest [32319：303]节点：a3 {{83.000000,34.000000}，{0.750000,0.500000}} 
 GraphTest [32319：303]节点：b1 {{161.000000,178.000000}，{0.750000,0.500000}} 
 GraphTest [32319：303]节点：b1 {{161.000000,250.000000}，{0.750000,0.500000}} 
 GraphTest [节点：b2 {{161.000000,106.000000}，{0.750000,0.500000}} 
 GraphTest [32319：303]节点：b3 {{161.000000,34.000000}，{0.750000,0.500000}} 
 GraphTest [ 32319：303]节点：x {{122.000000,322.000000}，{0.750000,0.500000}} 
  

Is there any good library for some graph-app? I want to create nodes, add weighted edges, etc…

EDIT

I need a graph (like on the image below) not a plot.

解决方案

According to the GraphViz documentation something like this should do the layout job:

- (void) testGraph {

    Agraph_t* G;
    GVC_t* gvc;
    gvc = gvContext();

    char* testGraph = "\
        digraph G {\
        subgraph cluster_c0 {a0 -> a1 -> a2 -> a3;}\
        subgraph cluster_c1 {b0 -> b1 -> b2 -> b3;}\
        x -> a0;\
        x -> b0;\
        a1 -> a3;\
        a3 -> a0;\
    }";

    G = agmemread((char*)testGraph);
    [self dumpGraph:G];

    gvLayout (gvc, G, "dot");
    NSLog(@"after layout:");

    [self dumpGraph:G];

    gvFreeLayout(gvc, G);
    gvFreeContext(gvc);

}

- (void) printNode:(Agnode_t*) node {
    NSLog(@"Node: %s {{%f,%f},{%f,%f}}",node->name,
          node->u.coord.x,
          node->u.coord.y,
          ND_width(node),
          ND_height(node));
}

- (void) dumpGraph:(Agraph_t*)graph {
    if (!graph)
        return;
    Agnode_t *n = NULL;
    Dict_t *dict = graph->nodes;
    for (n= dtfirst(dict); n ; n = dtnext(dict, n)) {
        [self printNode:n];
    }
}

Instead of using logNode: you should write some drawing code.

Log output:

GraphTest[32319:303] Node: a0 {{0.000000,0.000000},{0.000000,0.000000}}
GraphTest[32319:303] Node: a1 {{0.000000,0.000000},{0.000000,0.000000}}
GraphTest[32319:303] Node: a2 {{0.000000,0.000000},{0.000000,0.000000}}
GraphTest[32319:303] Node: a3 {{0.000000,0.000000},{0.000000,0.000000}}
GraphTest[32319:303] Node: b0 {{0.000000,0.000000},{0.000000,0.000000}}
GraphTest[32319:303] Node: b1 {{0.000000,0.000000},{0.000000,0.000000}}
GraphTest[32319:303] Node: b2 {{0.000000,0.000000},{0.000000,0.000000}}
GraphTest[32319:303] Node: b3 {{0.000000,0.000000},{0.000000,0.000000}}
GraphTest[32319:303] Node: x {{0.000000,0.000000},{0.000000,0.000000}}
GraphTest[32319:303] after layout:
GraphTest[32319:303] Node: a0 {{83.000000,250.000000},{0.750000,0.500000}}
GraphTest[32319:303] Node: a1 {{63.000000,178.000000},{0.750000,0.500000}}
GraphTest[32319:303] Node: a2 {{43.000000,106.000000},{0.750000,0.500000}}
GraphTest[32319:303] Node: a3 {{83.000000,34.000000},{0.750000,0.500000}}
GraphTest[32319:303] Node: b0 {{161.000000,250.000000},{0.750000,0.500000}}
GraphTest[32319:303] Node: b1 {{161.000000,178.000000},{0.750000,0.500000}}
GraphTest[32319:303] Node: b2 {{161.000000,106.000000},{0.750000,0.500000}}
GraphTest[32319:303] Node: b3 {{161.000000,34.000000},{0.750000,0.500000}}
GraphTest[32319:303] Node: x {{122.000000,322.000000},{0.750000,0.500000}} 

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