--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/svghmi/widget_meter.ysl2	Wed Mar 18 09:16:14 2020 +0100
@@ -0,0 +1,31 @@
+// widget_meter.ysl2
+
+
+template "widget[@type='Meter']", mode="widget_defs" {
+    param "hmi_element";
+    |     frequency: 10,
+    labels("needle range");
+    optional_labels("value min max");
+    |     dispatch: function(value) {
+    |         if(this.value_elt)
+    |             this.value_elt.textContent = String(value);
+    |         let [min,max,totallength] = this.range;
+    |         let length = Math.max(0,Math.min(totallength,(Number(value)-min)*totallength/(max-min)));
+    |         let tip = this.range_elt.getPointAtLength(length);
+    |         this.needle_elt.setAttribute('d', "M "+this.origin.x+","+this.origin.y+" "+tip.x+","+tip.y);
+    |     },
+    |     origin: undefined,
+    |     range: undefined,
+    |     init: function() {
+    |         let min = this.min_elt ?
+    |                     Number(this.min_elt.textContent) :
+    |                     this.args.length >= 1 ? this.args[0] : 0;
+    |         let max = this.max_elt ?
+    |                     Number(this.max_elt.textContent) :
+    |                     this.args.length >= 2 ? this.args[1] : 100;
+    |         this.range = [min, max, this.range_elt.getTotalLength()]
+    |         this.origin = this.needle_elt.getPointAtLength(0);
+    |     },
+}
+
+