拓扑图制作工具,用SpringGraph制作拓扑图和关系图

SpringGraph是Adobe的Flex 2.0的开源组件，它可以显示一套有相互联系的节点关系。该组件允许用户拖动和/或交互的个别节点。数据可以是XML或ActionScript对象。
本文使用xml数据来做演示.
网上搜下可以搜到几个非常不错的实例..SpringGraph 的文档还是比较少的.
先来看下本文做出来的效果图.

图形是自定义的,这里你可以使用任意图形来连接节点.
首先引入组件这个不用说,将SpringGraph.swc 组件引入到工程.
添加头部信息: xmlns:flex="http://www.adobe.com/2006/fc"

几个属性的介绍:
motionThreshold--布局计算停止的时间，有意义的值的范围是从0.001到2.0左右。低的数字意味着布局需要更长的时间定下来。高数量意味着布局将更快停止,这个值适中即可.
repulsionFactor--原子之间的关系间距,默认是0.75
dataProvider--不用说,就是你的数据来源.
itemRenderer--定义一个项目渲染UIComponent类,这个类可以绘制每个节点的样式以及形状大小.
lineColor --线的颜色.
autoFit--自动调整,保证该图形不跑出界面
这几个属性是我所用到的.可能用自己的语言组织出来不是很明白.大家试试就可以了。

之后需要一个符合格式的xml

var strXML:String = "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + "" + " ";

注意关键的属性 fromID 和toID
Node节点就是原子,Edge是他们之间的关系. prop 是名称 ,color就是圆的颜色了,order是线的粗细,number 的线上显示的文字.
Mian.mxml代码

motionThreshold="1.5" repulsionFactor="0.60" dataProvider="{graph}" autoFit="true" itemRenderer="AtomView">

[Bindable]
public var graph: Graph = new Graph();
//strXML就是上文写的到那段xml
private function gotData(strXml:String): void {
//ShowLoding();
graph.empty();
// 获得xml数据
var x:XML = new XML(strXml);
loadCML(x, graph);
}
// This namespace is used in some, but not all, CML files
public static var cmlns:Namespace = new Namespace("x-schema:cml_schema_ie_02.xml");
private static function loadCML(cml: XML, g: Graph): void {
var gid: String = cml.@id;
var item: Item;
for each (var node: XML in cml..Node) {
item = new Item(gid + node.@id);
item.data = node;
g.add(item);
}
for each (node in cml..cmlns::Node) {
item = new Item(gid + node.@id);
item.data = node;
g.add(item);
}
for each (var bond: XML in cml..Edge) {
loadBond(bond, g, gid);
}
for each (bond in cml..cmlns::Edge) {
loadBond(bond, g, gid);
}
}
private static function loadBond(bond: XML, g: Graph, gid: String): void {
var fromID: String;
var toID: String;
var orderString: String;
var infoString:String;
var colorString:String;
try {
fromID = bond.@fromID;
toID = bond.@toID;
orderString = bond.@order;
infoString = bond.@number;
colorString = bond.@color;
} catch (e: Error) {
}
var fromItem: Item = g.find(gid + fromID);
var toItem: Item = g.find(gid + toID);
if((fromItem != null) && (toItem != null)) {
var order: int = int(orderString.toString());
var data: Object = {settings: {alpha: 0.2 , color: colorString, tooltip: "测试数据",info:infoString, thickness: order}};
g.link(fromItem, toItem, data);
}
}

注意这句话:
var data: Object = {settings:{alpha:0.2,color:colorString,tooltip:”测试数据",info:infoString,thickness: order}};
这句话是设置连接先的样式.
itemRenderer="AtomView"
AtomView 是一个mxml组件 用来呈现图形化UI
AtomView.mxml代码:

scaleX="{Main.getInstance().scaleFactor}"
scaleY="{Main.getInstance().scaleFactor}" -->

import com.adobe.flex.extras.controls.springgraph.Item;
import mx.containers.ControlBar;
import mx.containers.Panel;
import mx.containers.VBox;
import mx.controls.Alert;
import mx.controls.Button;
import mx.controls.Label;
import mx.controls.List;
import mx.controls.Spacer;
import mx.controls.TextInput;
import mx.graphics.SolidColor;
import mx.graphics.SolidColorStroke;
import mx.graphics.Stroke;
import mx.managers.PopUpManager;

/** 项数据 **/
private var _data: Item;
/** 是否创建完成 */
private var created: Boolean = false;
override public function set data(d: Object): void {
super.data = d;
_data = d as Item;
if(created)
applyData();
}
/** called when this component and its child components are fully created. */
private function creationComplete(): void {
created = true;
if(_data != null)
applyData();
}
/** updates our view to represent the current Item, which is some kind of atom. */
private function applyData(): void {
var name: String = getAtomName(_data.data as XML);
var _color: int;
var dataXML:XML = _data.data as XML
var colorInt:int = int(dataXML.@color);
// this atom type is not in the 'atomColors' table. use a default.
_color = colorInt;
// determine the size. To a first approximation, all atoms are roughly the
// same size. See http://www.historyoftheuniverse.com/atomsize.html.
var labelX: int = 30;
var labelY: int = 50; // TODO: figure out how to do vertical centering automatically
var size: int = 60;
this.width = 62;
this.height = 62;
circle.color = _color;
circle.width = size;
circle.height = size;
circle.cx = 30;
circle.cy = 30;
circle.doubleClickEnabled = true;
var order:int = int(dataXML.@order);
lab.width = 120;
lab.x = 5;//labelX;
lab.y = 20;//labelY;
lab.text = name;
lab.doubleClickEnabled = true;
lab.toolTip = lab.text + "\n" + dataXML.@number;
size = 60+order*5;
circle.cx = 30+order*5;
circle.cy = 30+order*5;
this.width = 62+order*10;
this.height = 62+order*10;
circle.width = size+order*5;
circle.height = size+order*5;
lab.y = 20+order*5;

}
/** 获得元素名称 */
private function getAtomName(atomXML: XML): String {
var name: String = String(atomXML.@prop);
if((name == null) || (name.length == 0)) {
// We didn't' find a name. Try again using a namespace.
var ns: Namespace = Main.cmlns;
name = atomXML.ns::string; // .(@builtin == "elementType");
// TODO: the above XML expression works, but isn't the right expression. fix it.
}
return name;
}

Circle是一个自定义圆的UIComponent
Circle代码

package
{
import flash.display.GradientType;
import flash.display.InterpolationMethod;
import flash.display.SpreadMethod;
import flash.geom.Matrix;
import mx.core.UIComponent;
import mx.effects.Rotate;
/** A UIComponent that is simply a colored circle.
*
* @author Mark Shepherd
*/
public class Circle extends UIComponent
{
private var _cx:int;
private var _cy:int;
public function set cx(i: int): void {
_cx = i;
}
public function set cy(i: int): void {
_cy = i;
}
/** the color that this circle will be */
public function set color(i: int): void {
_color = i;
invalidateDisplayList();
}
/** our current color setting. */
private var _color: int;
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void {
graphics.clear();
graphics.beginFill(_color,0.4);
graphics.lineStyle(1,0x000000,1,true,"nomal","none");
graphics.drawCircle(_cx, _cy, unscaledWidth/2);
graphics.endFill();
}
}
}

多形状展示图形:

SpringGraph里面有一个Roamer分支
Roamer可以分层次展示,并且可以展示历史节点.功能依然强大,有兴趣的朋友可以试试.
谁有好的制作拓扑的组件可以推荐下,最近正在制作一个流程图,灰常给力..
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