虚线流动效果

虚线流动代码

var offset = 0;
var index = 0;
var timer = setInterval(function(){
    offset += -1;
//    edge2.setStyle(Q.Styles.EDGE_LINE_DASH_OFFSET, offset);
    edge1.setStyle(Q.Styles.EDGE_LINE_DASH_OFFSET, offset);
    index++;
    index = index%20;
    edge2.setStyle(Q.Styles.ARROW_TO_OFFSET, -0.3 -0.02 * (20 - index));
    edge1.setStyle(Q.Styles.ARROW_FROM_OFFSET, {x: 0.3 + 0.02 * (20 - index), y: -10});
}, 150);

运行效果

定制流动效果

实现代码

var line = graph.createShapeNode("Line");
line.moveTo(-100, 0);
line.lineTo(200, 0);
line.curveTo(300, 0, 300, 100, 200, 100);
line.lineTo(0, 100);
line.closePath();
line.setStyle(Q.Styles.SHAPE_STROKE_STYLE, "#2898E0");
line.setStyle(Q.Styles.SHAPE_LINE_DASH, [8, 5, 0.1, 6]);
line.setStyle(Q.Styles.SHAPE_STROKE, 3);
line.setStyle(Q.Styles.LINE_CAP, "round");
line.setStyle(Q.Styles.SHAPE_OUTLINE_STYLE, "#fcfb9b");

var ui = new Q.ImageUI("images/flow.png");
ui.position = {x: 0, y: 0};
ui.size = {width: 20};
ui.renderColor = "#F00";
line.addUI(ui);

setTimeout(function A(){
    var x = ui.position.x + 20;
    ui.position = {x: x % (ui.parent.length || 1), y: 0};
    line.invalidate();
    setTimeout(A, 300);
}, 100)

运行效果

进一步封装

FlowingSupport类代码

function FlowingSupport(graph) {
    this.flowMap = {};
    this.graph = graph;
}
FlowingSupport.prototype = {
    flowMap: null,
    length: 0,
    gap: 40,
    graph: null,
    addFlowing: function (edgeOrLine, count, byPercent) {
        var flowList = this.flowMap[edgeOrLine.id];
        if(!flowList){
            flowList = this.flowMap[edgeOrLine.id] = [];
            this.length++;
        }
        count = count || 1;
        while(--count >= 0){
            var ui = new Q.ImageUI("network/images/flow.png");
            ui.position = {x: 0, y: 0};
            ui.size = {width: 20};
            ui.renderColor = "#F00";
            flowList.push(ui);
            flowList.byPercent = byPercent;
            edgeOrLine.addUI(ui);
        }
    },
    removeFlowing: function(id){
        var flowList = this.flowMap[id];
        if(!flowList){
            return;
        }
        var edgeOrLine = this.graph.getElement(id);
        if(edgeOrLine){
            flowList.forEach(function(ui){
                edgeOrLine.removeUI(ui);
            })
        }
        this._doRemove(id);
    },
    _doRemove: function(id){
        delete this.flowMap[id];
        this.length--;
    },
    timer: null,
    perStep: 10,
    stop: function(){
        clearTimeout(this.timer);
    },
    start: function(){
        if(this.timer){
            clearTimeout(this.timer);
        }
        var offset = 0;
        var scope = this;
        scope.timer = setTimeout(function A() {
            if (!scope.length) {
                scope.timer = setTimeout(A, 2000);
                offset = 0;
                return;
            }
            offset += 1;
            for(var id in scope.flowMap){
                var ui = scope.graph.getUI(id);
                if(!ui){
                    scope._doRemove(id);
                    continue;
                }
                var lineLength = ui.length;
                if(!lineLength){
                    continue;
                }
                var flowList = scope.flowMap[id];
                if(flowList.byPercent){
                    //按百分比，0 - 1跑完整条线，线长度不同，速度也不同，跑完一圈的时间相同
                    var x = offset * 2;
                    var gap = 15;
                    scope.flowMap[id].forEach(function(ui){
                        ui.position = {x: (x % 100) / 100, y: 0};
                        x += gap;
                    });
                }else{
                    //按固定距离移动，速度相同，线条越长跑完一圈的时间越长
                    var x = offset * scope.perStep;
                    scope.flowMap[id].forEach(function(ui){
                        ui.position = {x: x % lineLength, y: 0};
                        x += scope.gap;
                    });
                }
                scope.graph.invalidateUI(ui);

                //dashed line
                var data = http://www.mamicode.com/ui.data;> 

 使用如下 
 这里的第二个参数为图标数量，第三个参数为是否按百分比流动，如果按百分比流动，每次移动的距离为线条长度的百分之二，这意味着不同长度的线条流动一圈，花费的时间相同 
var flowingSupport = new FlowingSupport(graph);
flowingSupport.addFlowing(edge, 3);
flowingSupport.addFlowing(edge2, 1);
flowingSupport.addFlowing(line, 1, true);
flowingSupport.addFlowing(line2, 2, true);

graph.callLater(function(){
    flowingSupport.start();
})
 

 运行效果 
 
 

 在线演示 
 
http://demo.qunee.com/#Flowing Demo
线条流动效果