md`# Arc Gauge`
viewof value = slider({min:0, max:100, step:0.1, title:"input value" })
shapeStore ={
let xtype = {}
xtype.arcgauge = arcgauge();
return xtype
}
arcgauge = conf => {
const gauge = {};
const _f1 = d3.format(".1f");
const _config = conf ? conf : {min:0, max:100, bgRadius:40, bgArcWidth:5, bgColor:"#475b66", ftRadius:40, ftArcWidth:5, ftColor:"#ff9633", startAngle:-2.5, endAngle:2.5, cornerRadius:0, x:0, y:0} //default config
gauge.updateShape = function(node,config){
d3.select(node).selectAll("*").remove();
this.render(node,config) ;
};
gauge.updateValue = function(node,v){
node.value = v;
let g = d3.select(node)
g.select("text.tempText").text(function(d){return _f1(d.value);});
node.bgconf[1].endAngle = node.scale(v);
g.selectAll("path").data(node.bgconf,function(d){return d.id;})
.attr("d",function(d){
return d3.arc().innerRadius(d.innerR).outerRadius(d.outerR).cornerRadius(d.cornerRadius)
.startAngle(d.startAngle).endAngle(d.endAngle)();
});
};
gauge.render = function(node,config){
config = Object.assign({},_config,config);
node.scale = d3.scaleLinear().domain([config.min, config.max]).range([config.startAngle, config.endAngle]);
node.scale.clamp(true) ;
node.bgconf = [
{id: "bg", innerR: config.bgRadius, outerR: config.bgRadius+config.bgArcWidth, startAngle: config.startAngle, endAngle: config.endAngle, color: config.bgColor, cornerRadius:config.cornerRadius },
{id: "ft", innerR: config.ftRadius, outerR: config.ftRadius+config.ftArcWidth, startAngle: config.startAngle, endAngle: config.endAngle, color: config.ftColor, cornerRadius:config.cornerRadius }
];
let g=d3.select(node)
.attr("transform","translate("+[config.x,config.y]+")") ;
g.append("text")
.attr("class","tempText unselectable")
.attr("fill","#FFF")
.attr("x",-15)
.attr("y",5)
.text(_f1(config.value));
node.bgconf[1].endAngle = node.scale(config.value);
g.selectAll("path")
.data(node.bgconf,function(d){return d.id;})
.enter().append("path")
.attr("d",function(d){
return d3.arc().innerRadius(d.innerR).outerRadius(d.outerR).cornerRadius(d.cornerRadius)
.startAngle(d.startAngle).endAngle(d.endAngle)();
})
.attr("stroke",function(d){return d.color;})
.attr("fill",function(d){return d.color;});
}
return gauge ;
}
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