flowchart.js徒手绘制流程图

周星星9527

发布于 2020-04-16 17:18:50

7K0

发布于 2020-04-16 17:18:50

要画20个流程（时序）图，于是昨天捣鼓了到半夜，安装了plantUML + vscode，虽然丑了些，但勉强能看，目前已用plantUML完成了10个。

plantUML虽好，但要安装java运行时。就用一小会却要占用那么多硬盘空间，看了看flowchart.js，也挺香。

flowchart.js is a flowchart DSL and SVG render that runs in the browser and terminal.Nodes and connections are defined in separately so that nodes can be reused and connections can be quickly changed. Fine grain changes to node and connector style can also be made right in the DSL. https://github.com/adrai/flowchart.js

官方站点的代码：

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>flowchart.js · Playground</title>
        <style type="text/css">
          .end-element { fill : #FFCCFF; }
</style>
        <script src="http://cdnjs.cloudflare.com/ajax/libs/raphael/2.3.0/raphael.min.js"></script>
        <script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
        <script src="http://flowchart.js.org/flowchart-latest.js"></script>
        <!-- <script src="../release/flowchart.min.js"></script> -->
        <script>

            window.onload = function () {
                var btn = document.getElementById("run"),
                    cd = document.getElementById("code"),
                    chart;

                (btn.onclick = function () {
                    var code = cd.value;

                    if (chart) {
                      chart.clean();
                    }

                    chart = flowchart.parse(code);
                    chart.drawSVG('canvas', {
                      // 'x': 30,
                      // 'y': 50,
                      'line-width': 3,
                      'maxWidth': 3,//ensures the flowcharts fits within a certian width
                      'line-length': 50,
                      'text-margin': 10,
                      'font-size': 14,
                      'font': 'normal',
                      'font-family': 'Helvetica',
                      'font-weight': 'normal',
                      'font-color': 'black',
                      'line-color': 'black',
                      'element-color': 'black',
                      'fill': 'white',
                      'yes-text': 'yes',
                      'no-text': 'no',
                      'arrow-end': 'block',
                      'scale': 1,
                      'symbols': {
                        'start': {
                          'font-color': 'red',
                          'element-color': 'green',
                          'fill': 'yellow'
                        },
                        'end':{
                          'class': 'end-element'
                        }
                      },
                      'flowstate' : {
                        'past' : { 'fill' : '#CCCCCC', 'font-size' : 12},
                        'current' : {'fill' : 'yellow', 'font-color' : 'red', 'font-weight' : 'bold'},
                        'future' : { 'fill' : '#FFFF99'},
                        'request' : { 'fill' : 'blue'},
                        'invalid': {'fill' : '#444444'},
                        'approved' : { 'fill' : '#58C4A3', 'font-size' : 12, 'yes-text' : 'APPROVED', 'no-text' : 'n/a' },
                        'rejected' : { 'fill' : '#C45879', 'font-size' : 12, 'yes-text' : 'n/a', 'no-text' : 'REJECTED' }
                      }
                    });

                    $('[id^=sub1]').click(function(){
                      alert('info here');
                    });
                })();

            };

            function myFunction(event, node) {
              console.log("You just clicked this node:", node);
            }
</script>
    </head>
    <body>
        <div><textarea id="code" style="width: 100%;" rows="11">
st=>start: Start|past:>http://www.google.com[blank]
e=>end: End:>http://www.google.com
op1=>operation: My Operation|past:$myFunction
op2=>operation: Stuff|current
sub1=>subroutine: My Subroutine|invalid
cond=>condition: Yes
or No?|approved:>http://www.google.com
c2=>condition: Good idea|rejected
io=>inputoutput: catch something...|request
para=>parallel: parallel tasks

st->op1(right)->cond
cond(yes, right)->c2
cond(no)->para
c2(true)->io->e
c2(false)->e

para(path1, bottom)->sub1(left)->op1
para(path2, right)->op2->e

st@>op1({"stroke":"Red"})@>cond({"stroke":"Red","stroke-width":6,"arrow-end":"classic-wide-long"})@>c2({"stroke":"Red"})@>op2({"stroke":"Red"})@>e({"stroke":"Red"})</textarea></div>
        <div><button id="run" type="button">Run</button></div>
        <div id="canvas"></div>
    </body>
</html>

运行效果如下：

简单一些的例子：

st=>start: Start:>http://www.baidu.com[blank]
e=>end:>http://www.baidu.com
op1=>operation: My Operation
sub1=>subroutine: My Subroutine
cond=>condition: Yes
or No?:>http://www.baidu.com
io=>inputoutput: catch something...
para=>parallel: parallel tasks

st->op1->cond
cond(yes)->io->e
cond(no)->para
para(path1, bottom)->sub1(right)->op1
para(path2, top)->op1

运行效果如下：