1 // widget_meter.ysl2

     2 

     3 

     4 template "widget[@type='Meter']", mode="widget_defs" {

     5     param "hmi_element";

     6     |     frequency: 10,

     7     labels("needle range");

     8     optional_labels("value min max");

     9     |     dispatch: function(value) {

    10     |         if(this.value_elt)

    11     |             this.value_elt.textContent = String(value);

    12     |         let [min,max,totallength] = this.range;

    13     |         let length = Math.max(0,Math.min(totallength,(Number(value)-min)*totallength/(max-min)));

    14     |         let tip = this.range_elt.getPointAtLength(length);

    15     |         this.needle_elt.setAttribute('d', "M "+this.origin.x+","+this.origin.y+" "+tip.x+","+tip.y);

    16     |     },

    17     |     origin: undefined,

    18     |     range: undefined,

    19     |     init: function() {

    20     |         let min = this.min_elt ?

    21     |                     Number(this.min_elt.textContent) :

    22     |                     this.args.length >= 1 ? this.args[0] : 0;

    23     |         let max = this.max_elt ?

    24     |                     Number(this.max_elt.textContent) :

    25     |                     this.args.length >= 2 ? this.args[1] : 100;

    26     |         this.range = [min, max, this.range_elt.getTotalLength()]

    27     |         this.origin = this.needle_elt.getPointAtLength(0);

    28     |     },

    29 }

    30 

    31