Fix zooming on the viewer

static/js/adc2019-viewer.js

@@ -68,10 +68,10 @@ class ADC2019BoardViewer {
         let _self = this;
 
         var zoom = d3.zoom()
-            .scaleExtent([0.5, 5])
+            .scaleExtent([0.2, 2])
             .translateExtent([
-                [-this.width * 2, -this.height * 2],
-                [this.width * 2, this.height * 2]
+                [-this.width * 10, -this.height * 10],
+                [this.width * 10, this.height * 10]
                 ])
             .on("zoom", zoomed);
 
@@ -81,9 +81,9 @@ class ADC2019BoardViewer {
             // this.slider.property("value", d3.event.scale);
         }
 
-        function slided(d) {
-            zoom.scaleTo(this.svg, d3.select(this).property("value"));
-        }
+        // function slided(d) {
+        //     zoom.scaleTo(this.svg, d3.select(this).property("value"));
+        // }
         
         // var slider = d3.select("body").append("input")
         //     .datum({})
@@ -95,7 +95,6 @@ class ADC2019BoardViewer {
         //     .on("input", slided);
 
         this.svg.call(zoom).on('dblclick.zoom', null);
-
     }
 
     _draw_solution(data){