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"

<flex:SpringGraph id="springgraph" bottom="0" top="0" right="0" left="0" backgroundColor="#ffffff"
                      motionThreshold="1.5"  repulsionFactor="0.60" dataProvider="{graph}" itemRenderer="AtomView">
</flex:SpringGraph>

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 = "<molecule convention=\"MDLMol\" id=\"dataSmall\" title=\"NICOTINE\">" +
  "<graph>" +
    "<Node id=\"1\"   prop=\"节点文章\"   color=\"0xaf3a42\" />" +
    "<Node id=\"1.1\" prop=\"文章第一篇\" color=\"0xfa7730\"  />" +
    "<Node id=\"1.2\" prop=\"文章第二篇\" color=\"0x33CC99\"/>" +
    "<Node id=\"1.3\" prop=\"文章第三篇\" color=\"0x6b4c8f\" />" +
    "<Node id=\"1.4\" prop=\"文章第四篇\" color=\"0x585fee\" />" +
    "<Node id=\"1.1.1\" prop=\"关键字一\" color=\"0xaf3a42\" />" +
    "<Node id=\"1.1.2\" prop=\"关键字二\" color=\"0x6b4c8f\"  />" +
    "<Node id=\"1.1.3\" prop=\"关键字三\" color=\"0xfa7730\"  />" +
    "<Node id=\"1.1.4\" prop=\"关键字四\" color=\"0x585fee\" />" +

    "<Edge fromID=\"1\" toID=\"1.1\" order=\"1\" number=\"10\"/>" +
    "<Edge fromID=\"1\" toID=\"1.2\" order=\"3\" number=\"15\"/>" +
    "<Edge fromID=\"1\" toID=\"1.3\" order=\"4\" number=\"3\"/>" +
    "<Edge fromID=\"1\" toID=\"1.4\" order=\"2\" number=\"8\"/>" +
    "<Edge fromID=\"1.1\" toID=\"1.1.1\" order=\"5\" number=\"7\"/>" +
    "<Edge fromID=\"1.1\" toID=\"1.1.2\" order=\"1\" number=\"4\"/>" +
    "<Edge fromID=\"1.1\" toID=\"1.1.3\" order=\"3\" number=\"12\"/>" +
    "<Edge fromID=\"1.1\" toID=\"1.1.4\" order=\"2\" number=\"9\"/>" +
    "<Edge fromID=\"1.2\" toID=\"1.1.1\" order=\"5\" number=\"100\"/>" +
    "
  </graph>
</molecule>";

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

<flex:SpringGraph id="springgraph" bottom="0" top="0" right="0" left="0" backgroundColor="#ffffff"
                  motionThreshold="1.5"  repulsionFactor="0.60" dataProvider="{graph}" autoFit="true"  itemRenderer="AtomView">
<fx:Script>
        [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);
            }

        }
</fx:Script>

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:

<Circle id="circle" doubleClick="createPopUp(data.data.@pid)"/>
<mx:Label id="lab"  doubleClick="createPopUp(data.data.@pid)"/>
<mx:Style source="index.css"/>
    scaleX="{Main.getInstance().scaleFactor}"
scaleY="{Main.getInstance().scaleFactor}" -->
<mx:Script>
<![CDATA[
        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;
        }
</mx:Script>

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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