LUHFT_HeadBI_collapsible_tree.html

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<title>collapsibleTree</title>
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            .css("height", el.offsetHeight);
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          $el.after(errorDiv);

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              .css("left", el.offsetLeft)
              .css("maxWidth", el.offsetWidth)
              .css("height", el.offsetHeight);
          }, 500);
        }
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  // - initialize (optional) - A function(el) that will be called once per
  //   widget element; if a value is returned, it will be passed as the third
  //   value to renderValue.
  // - renderValue (required) - A function(el, data, initValue) that will be
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    // TODO: Verify that .name is a valid CSS classname

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    //   factory(el, width, height)
    // which returns an object that has renderValue(x) and resize(w, h).
    // This enables a far more natural programming style for the widget
    // author, who can store per-instance state using either OO-style
    // instance fields or functional-style closure variables (I guess this
    // is in contrast to what can only be called C-style pseudo-OO which is
    // what we required before).
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    // contain static widgets.
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    // Merge defaults into the definition; don't mutate the original definition.
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        return filterByClass(results, "html-widget-output", false);
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      // but they actually have quite different semantics (the Shiny
      // bindings receive data that includes lots of metadata that it
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      // just ignore the difference because in some widgets it's helpful
      // to call this.renderValue() from inside of resize(), and if
      // we're not delegating, then that call will go to the Shiny
      // version instead of the htmlwidgets version.

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      var bindingDef = extend({}, defaults, definition);

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      var shinyBinding = new Shiny.OutputBinding();

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      // methods in the future, and we want them to be overrideable by
      // HTMLWidget binding definitions, then we'll need to add them to this
      // list.
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      delegateMethod(shinyBinding, bindingDef, "onValueChange");
      delegateMethod(shinyBinding, bindingDef, "onValueError");
      delegateMethod(shinyBinding, bindingDef, "renderError");
      delegateMethod(shinyBinding, bindingDef, "clearError");
      delegateMethod(shinyBinding, bindingDef, "showProgress");

      // The find, renderValue, and resize are handled differently, because we
      // want to actually decorate the behavior of the bindingDef methods.

      shinyBinding.find = function(scope) {
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        // Only return elements that are Shiny outputs, not static ones
        var dynamicResults = results.filter(".html-widget-output");

        // It's possible that whatever caused Shiny to think there might be
        // new dynamic outputs, also caused there to be new static outputs.
        // Since there might be lots of different htmlwidgets bindings, we
        // schedule execution for later--no need to staticRender multiple
        // times.
        if (results.length !== dynamicResults.length)
          scheduleStaticRender();

        return dynamicResults;
      };

      // Wrap renderValue to handle initialization, which unfortunately isn't
      // supported natively by Shiny at the time of this writing.

      shinyBinding.renderValue = function(el, data) {
        Shiny.renderDependencies(data.deps);
        // Resolve strings marked as javascript literals to objects
        if (!(data.evals instanceof Array)) data.evals = [data.evals];
        for (var i = 0; data.evals && i < data.evals.length; i++) {
          window.HTMLWidgets.evaluateStringMember(data.x, data.evals[i]);
        }
        if (!bindingDef.renderOnNullValue) {
          if (data.x === null) {
            el.style.visibility = "hidden";
            return;
          } else {
            el.style.visibility = "inherit";
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        if (!elementData(el, "initialized")) {
          initSizing(el);

          elementData(el, "initialized", true);
          if (bindingDef.initialize) {
            var rect = el.getBoundingClientRect();
            var result = bindingDef.initialize(el, rect.width, rect.height);
            elementData(el, "init_result", result);
          }
        }
        bindingDef.renderValue(el, data.x, elementData(el, "init_result"));
        evalAndRun(data.jsHooks.render, elementData(el, "init_result"), [el, data.x]);
      };

      // Only override resize if bindingDef implements it
      if (bindingDef.resize) {
        shinyBinding.resize = function(el, width, height) {
          // Shiny can call resize before initialize/renderValue have been
          // called, which doesn't make sense for widgets.
          if (elementData(el, "initialized")) {
            bindingDef.resize(el, width, height, elementData(el, "init_result"));
          }
        };
      }

      Shiny.outputBindings.register(shinyBinding, bindingDef.name);
    }
  };

  var scheduleStaticRenderTimerId = null;
  function scheduleStaticRender() {
    if (!scheduleStaticRenderTimerId) {
      scheduleStaticRenderTimerId = setTimeout(function() {
        scheduleStaticRenderTimerId = null;
        window.HTMLWidgets.staticRender();
      }, 1);
    }
  }

  // Render static widgets after the document finishes loading
  // Statically render all elements that are of this widget's class
  window.HTMLWidgets.staticRender = function() {
    var bindings = window.HTMLWidgets.widgets || [];
    forEach(bindings, function(binding) {
      var matches = binding.find(document.documentElement);
      forEach(matches, function(el) {
        var sizeObj = initSizing(el, binding);

        var getSize = function(el) {
          if (sizeObj) {
            return {w: sizeObj.getWidth(), h: sizeObj.getHeight()}
          } else {
            var rect = el.getBoundingClientRect();
            return {w: rect.width, h: rect.height}
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        };

        if (hasClass(el, "html-widget-static-bound"))
          return;
        el.className = el.className + " html-widget-static-bound";

        var initResult;
        if (binding.initialize) {
          var size = getSize(el);
          initResult = binding.initialize(el, size.w, size.h);
          elementData(el, "init_result", initResult);
        }

        if (binding.resize) {
          var lastSize = getSize(el);
          var resizeHandler = function(e) {
            var size = getSize(el);
            if (size.w === 0 && size.h === 0)
              return;
            if (size.w === lastSize.w && size.h === lastSize.h)
              return;
            lastSize = size;
            binding.resize(el, size.w, size.h, initResult);
          };

          on(window, "resize", resizeHandler);

          // This is needed for cases where we're running in a Shiny
          // app, but the widget itself is not a Shiny output, but
          // rather a simple static widget. One example of this is
          // an rmarkdown document that has runtime:shiny and widget
          // that isn't in a render function. Shiny only knows to
          // call resize handlers for Shiny outputs, not for static
          // widgets, so we do it ourselves.
          if (window.jQuery) {
            window.jQuery(document).on(
              "shown.htmlwidgets shown.bs.tab.htmlwidgets shown.bs.collapse.htmlwidgets",
              resizeHandler
            );
            window.jQuery(document).on(
              "hidden.htmlwidgets hidden.bs.tab.htmlwidgets hidden.bs.collapse.htmlwidgets",
              resizeHandler
            );
          }

          // This is needed for the specific case of ioslides, which
          // flips slides between display:none and display:block.
          // Ideally we would not have to have ioslide-specific code
          // here, but rather have ioslides raise a generic event,
          // but the rmarkdown package just went to CRAN so the
          // window to getting that fixed may be long.
          if (window.addEventListener) {
            // It's OK to limit this to window.addEventListener
            // browsers because ioslides itself only supports
            // such browsers.
            on(document, "slideenter", resizeHandler);
            on(document, "slideleave", resizeHandler);
          }
        }

        var scriptData = document.querySelector("script[data-for='" + el.id + "'][type='application/json']");
        if (scriptData) {
          var data = JSON.parse(scriptData.textContent || scriptData.text);
          // Resolve strings marked as javascript literals to objects
          if (!(data.evals instanceof Array)) data.evals = [data.evals];
          for (var k = 0; data.evals && k < data.evals.length; k++) {
            window.HTMLWidgets.evaluateStringMember(data.x, data.evals[k]);
          }
          binding.renderValue(el, data.x, initResult);
          evalAndRun(data.jsHooks.render, initResult, [el, data.x]);
        }
      });
    });

    invokePostRenderHandlers();
  }


  function has_jQuery3() {
    if (!window.jQuery) {
      return false;
    }
    var $version = window.jQuery.fn.jquery;
    var $major_version = parseInt($version.split(".")[0]);
    return $major_version >= 3;
  }

  /*
  / Shiny 1.4 bumped jQuery from 1.x to 3.x which means jQuery's
  / on-ready handler (i.e., $(fn)) is now asyncronous (i.e., it now
  / really means $(setTimeout(fn)).
  / https://jquery.com/upgrade-guide/3.0/#breaking-change-document-ready-handlers-are-now-asynchronous
  /
  / Since Shiny uses $() to schedule initShiny, shiny>=1.4 calls initShiny
  / one tick later than it did before, which means staticRender() is
  / called renderValue() earlier than (advanced) widget authors might be expecting.
  / https://github.com/rstudio/shiny/issues/2630
  /
  / For a concrete example, leaflet has some methods (e.g., updateBounds)
  / which reference Shiny methods registered in initShiny (e.g., setInputValue).
  / Since leaflet is privy to this life-cycle, it knows to use setTimeout() to
  / delay execution of those methods (until Shiny methods are ready)
  / https://github.com/rstudio/leaflet/blob/18ec981/javascript/src/index.js#L266-L268
  /
  / Ideally widget authors wouldn't need to use this setTimeout() hack that
  / leaflet uses to call Shiny methods on a staticRender(). In the long run,
  / the logic initShiny should be broken up so that method registration happens
  / right away, but binding happens later.
  */
  function maybeStaticRenderLater() {
    if (shinyMode && has_jQuery3()) {
      window.jQuery(window.HTMLWidgets.staticRender);
    } else {
      window.HTMLWidgets.staticRender();
    }
  }

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  } else if (document.attachEvent) {
    document.attachEvent("onreadystatechange", function() {
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arguments.length?n(Ba(t)):n()._curve},t},Ag=function(t,n){return[(n=+n)*Math.cos(t-=Math.PI/2),n*Math.sin(t)]},Cg=Array.prototype.slice,zg={draw:function(t,n){var e=Math.sqrt(n/gg);t.moveTo(e,0),t.arc(0,0,e,0,xg)}},Pg={draw:function(t,n){var e=Math.sqrt(n/5)/2;t.moveTo(-3*e,-e),t.lineTo(-e,-e),t.lineTo(-e,-3*e),t.lineTo(e,-3*e),t.lineTo(e,-e),t.lineTo(3*e,-e),t.lineTo(3*e,e),t.lineTo(e,e),t.lineTo(e,3*e),t.lineTo(-e,3*e),t.lineTo(-e,e),t.lineTo(-3*e,e),t.closePath()}},Rg=Math.sqrt(1/3),Lg=2*Rg,qg={draw:function(t,n){var e=Math.sqrt(n/Lg),r=e*Rg;t.moveTo(0,-e),t.lineTo(r,0),t.lineTo(0,e),t.lineTo(-r,0),t.closePath()}},Ug=Math.sin(gg/10)/Math.sin(7*gg/10),Dg=Math.sin(xg/10)*Ug,Og=-Math.cos(xg/10)*Ug,Fg={draw:function(t,n){var e=Math.sqrt(.8908130915292852*n),r=Dg*e,i=Og*e;t.moveTo(0,-e),t.lineTo(r,i);for(var o=1;o<5;++o){var u=xg*o/5,a=Math.cos(u),c=Math.sin(u);t.lineTo(c*e,-a*e),t.lineTo(a*r-c*i,c*r+a*i)}t.closePath()}},Ig={draw:function(t,n){var e=Math.sqrt(n),r=-e/2;t.rect(r,r,e,e)}},Yg=Math.sqrt(3),Bg={draw:function(t,n){var e=-Math.sqrt(n/(3*Yg));t.moveTo(0,2*e),t.lineTo(-Yg*e,-e),t.lineTo(Yg*e,-e),t.closePath()}},jg=-.5,Hg=Math.sqrt(3)/2,Xg=1/Math.sqrt(12),$g=3*(Xg/2+1),Vg={draw:function(t,n){var e=Math.sqrt(n/$g),r=e/2,i=e*Xg,o=r,u=e*Xg+e,a=-o,c=u;t.moveTo(r,i),t.lineTo(o,u),t.lineTo(a,c),t.lineTo(jg*r-Hg*i,Hg*r+jg*i),t.lineTo(jg*o-Hg*u,Hg*o+jg*u),t.lineTo(jg*a-Hg*c,Hg*a+jg*c),t.lineTo(jg*r+Hg*i,jg*i-Hg*r),t.lineTo(jg*o+Hg*u,jg*u-Hg*o),t.lineTo(jg*a+Hg*c,jg*c-Hg*a),t.closePath()}},Wg=[zg,Pg,qg,Ig,Fg,Bg,Vg],Zg=function(){};Ja.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){switch(this._point){case 3:Ga(this,this._x1,this._y1);case 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3:this.point(this._x2,this._y2),this.point(this._x3,this._y3),this.point(this._x4,this._y4)}},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._x2=t,this._y2=n;break;case 1:this._point=2,this._x3=t,this._y3=n;break;case 2:this._point=3,this._x4=t,this._y4=n,this._context.moveTo((this._x0+4*this._x1+t)/6,(this._y0+4*this._y1+n)/6);break;default:Ga(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}};Ka.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=NaN,this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3;var e=(this._x0+4*this._x1+t)/6,r=(this._y0+4*this._y1+n)/6;this._line?this._context.lineTo(e,r):this._context.moveTo(e,r);break;case 3:this._point=4;default:Ga(this,t,n)}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n}};tc.prototype={lineStart:function(){this._x=[],this._y=[],this._basis.lineStart()},lineEnd:function(){var t=this._x,n=this._y,e=t.length-1;if(e>0)for(var r,i=t[0],o=n[0],u=t[e]-i,a=n[e]-o,c=-1;++c<=e;)r=c/e,this._basis.point(this._beta*t[c]+(1-this._beta)*(i+r*u),this._beta*n[c]+(1-this._beta)*(o+r*a));this._x=this._y=null,this._basis.lineEnd()},point:function(t,n){this._x.push(+t),this._y.push(+n)}};var Gg=function t(n){function e(t){return 1===n?new Ja(t):new tc(t,n)}return e.beta=function(n){return t(+n)},e}(.85);ec.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x2,this._y2);break;case 3:nc(this,this._x1,this._y1)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2,this._x1=t,this._y1=n;break;case 2:this._point=3;default:nc(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var Jg=function t(n){function e(t){return new ec(t,n)}return e.tension=function(n){return t(+n)},e}(0);rc.prototype={areaStart:Zg,areaEnd:Zg,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._x5=this._y0=this._y1=this._y2=this._y3=this._y4=this._y5=NaN,this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x3,this._y3),this._context.closePath();break;case 2:this._context.lineTo(this._x3,this._y3),this._context.closePath();break;case 3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 2:this._point=3,this._x5=t,this._y5=n;break;default:nc(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var Qg=function t(n){function e(t){return new rc(t,n)}return e.tension=function(n){return t(+n)},e}(0);ic.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){switch(t=+t,n=+n,this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3,this._line?this._context.lineTo(this._x2,this._y2):this._context.moveTo(this._x2,this._y2);break;case 3:this._point=4;default:nc(this,t,n)}this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var Kg=function t(n){function e(t){return new ic(t,n)}return e.tension=function(n){return t(+n)},e}(0);uc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._l01_a=this._l12_a=this._l23_a=this._l01_2a=this._l12_2a=this._l23_2a=this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x2,this._y2);break;case 3:this.point(this._x2,this._y2)}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 2:this._point=3;default:oc(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var tm=function t(n){function e(t){return n?new uc(t,n):new ec(t,0)}return e.alpha=function(n){return t(+n)},e}(.5);ac.prototype={areaStart:Zg,areaEnd:Zg,lineStart:function(){this._x0=this._x1=this._x2=this._x3=this._x4=this._x5=this._y0=this._y1=this._y2=this._y3=this._y4=this._y5=NaN,this._l01_a=this._l12_a=this._l23_a=this._l01_2a=this._l12_2a=this._l23_2a=this._point=0},lineEnd:function(){switch(this._point){case 1:this._context.moveTo(this._x3,this._y3),this._context.closePath();break;case 2:this._context.lineTo(this._x3,this._y3),this._context.closePath();break;case 3:this.point(this._x3,this._y3),this.point(this._x4,this._y4),this.point(this._x5,this._y5)}},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1,this._x3=t,this._y3=n;break;case 1:this._point=2,this._context.moveTo(this._x4=t,this._y4=n);break;case 2:this._point=3,this._x5=t,this._y5=n;break;default:oc(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var nm=function t(n){function e(t){return n?new ac(t,n):new rc(t,0)}return e.alpha=function(n){return t(+n)},e}(.5);cc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._x2=this._y0=this._y1=this._y2=NaN,this._l01_a=this._l12_a=this._l23_a=this._l01_2a=this._l12_2a=this._l23_2a=this._point=0},lineEnd:function(){(this._line||0!==this._line&&3===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){if(t=+t,n=+n,this._point){var e=this._x2-t,r=this._y2-n;this._l23_a=Math.sqrt(this._l23_2a=Math.pow(e*e+r*r,this._alpha))}switch(this._point){case 0:this._point=1;break;case 1:this._point=2;break;case 2:this._point=3,this._line?this._context.lineTo(this._x2,this._y2):this._context.moveTo(this._x2,this._y2);break;case 3:this._point=4;default:oc(this,t,n)}this._l01_a=this._l12_a,this._l12_a=this._l23_a,this._l01_2a=this._l12_2a,this._l12_2a=this._l23_2a,this._x0=this._x1,this._x1=this._x2,this._x2=t,this._y0=this._y1,this._y1=this._y2,this._y2=n}};var em=function t(n){function e(t){return n?new cc(t,n):new ic(t,0)}return e.alpha=function(n){return t(+n)},e}(.5);sc.prototype={areaStart:Zg,areaEnd:Zg,lineStart:function(){this._point=0},lineEnd:function(){this._point&&this._context.closePath()},point:function(t,n){t=+t,n=+n,this._point?this._context.lineTo(t,n):(this._point=1,this._context.moveTo(t,n))}};dc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x0=this._x1=this._y0=this._y1=this._t0=NaN,this._point=0},lineEnd:function(){switch(this._point){case 2:this._context.lineTo(this._x1,this._y1);break;case 3:pc(this,this._t0,hc(this,this._t0))}(this._line||0!==this._line&&1===this._point)&&this._context.closePath(),this._line=1-this._line},point:function(t,n){var e=NaN;if(t=+t,n=+n,t!==this._x1||n!==this._y1){switch(this._point){case 0:this._point=1,this._line?this._context.lineTo(t,n):this._context.moveTo(t,n);break;case 1:this._point=2;break;case 2:this._point=3,pc(this,hc(this,e=lc(this,t,n)),e);break;default:pc(this,this._t0,e=lc(this,t,n))}this._x0=this._x1,this._x1=t,this._y0=this._y1,this._y1=n,this._t0=e}}},(vc.prototype=Object.create(dc.prototype)).point=function(t,n){dc.prototype.point.call(this,n,t)},_c.prototype={moveTo:function(t,n){this._context.moveTo(n,t)},closePath:function(){this._context.closePath()},lineTo:function(t,n){this._context.lineTo(n,t)},bezierCurveTo:function(t,n,e,r,i,o){this._context.bezierCurveTo(n,t,r,e,o,i)}},yc.prototype={areaStart:function(){this._line=0},areaEnd:function(){this._line=NaN},lineStart:function(){this._x=[],this._y=[]},lineEnd:function(){var t=this._x,n=this._y,e=t.length;if(e)if(this._line?this._context.lineTo(t[0],n[0]):this._context.moveTo(t[0],n[0]),2===e)this._context.lineTo(t[1],n[1]);else for(var 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<style type="text/css">.collapsibleTree .node {
cursor: pointer;
}
.collapsibleTree .node circle {
fill: #fff;
stroke: #000;
}
.collapsibleTree .node text {
font: 10px sans-serif;
}
.collapsibleTree .link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
.collapsibleTree div.tooltip {
position: absolute;
text-align: center;
padding: 3px;
font: 10px sans-serif;
background: #fff;
border: 2px;
border-radius: 8px;
border-style: solid;
pointer-events: none;
}
</style>
<script>HTMLWidgets.widget({

  name: 'collapsibleTree',
  type: 'output',

  factory: function(el, width, height) {

    var i = 0,
    duration = 750,
    root = {},
    options = {},
    treemap;

    // Optionally enable zooming, and limit to 1/5x or 5x of the original viewport
    var zoom = d3.zoom()
    .scaleExtent([1/5, 5])
    .on('zoom', function () {
      svg.attr('transform', d3.event.transform)
    })

    // create our tree object and bind it to the element
    // appends a 'group' element to 'svg'
    // moves the 'group' element to the top left margin
    var svg = d3.select(el).append('svg')
    .attr('width', width)
    .attr('height', height)
    .append('g');

    // Define the div for the tooltip
    var tooltip = d3.select(el).append('div')
    .attr('class', 'tooltip')
    .style('opacity', 0);

    function update(source) {

      // Assigns the x and y position for the nodes
      var treeData = treemap(root);

      // Compute the new tree layout.
      var nodes = treeData.descendants(),
      links = treeData.descendants().slice(1);

      // Normalize for fixed-depth.
      nodes.forEach(function(d) {d.y = d.depth * options.linkLength});

      // ****************** Nodes section ***************************

      // Update the nodes...
      var node = svg.selectAll('g.node')
      .data(nodes, function(d) {return d.id || (d.id = ++i); });

      // Enter any new modes at the parent's previous position.
      var nodeEnter = node.enter().append('g')
      .attr('class', 'node')
      .attr('transform', function(d) {
        return 'translate(' + source.y0 + ',' + source.x0 + ')';
      })
      .on('click', click);

      // Add tooltips, if specified in options
      if (options.tooltip) {
        nodeEnter = nodeEnter
        .on('mouseover', mouseover)
        .on('mouseout', mouseout);
      }

      // Enable zooming, if specified
      if (options.zoomable) d3.select(el).select('svg').call(zoom)

      // Add Circle for the nodes
      nodeEnter.append('circle')
      .attr('class', 'node')
      .attr('r', 1e-6)
      .style('fill', function(d) {
        return d.data.fill || (d._children ? options.fill : '#fff');
      })
      .style('stroke-width', function(d) {
        return d._children ? 3 : 1;
      });

      // Add labels for the nodes
      nodeEnter.append('text')
      .attr('dy', '.35em')
      .attr('x', function(d) {
        // Scale padding for label to the size of node
        var padding = (d.data.SizeOfNode || 10) + 3
        return d.children || d._children ? -1 * padding : padding;
      })
      .attr('text-anchor', function(d) {
        return d.children || d._children ? 'end' : 'start';
      })
      .style('font-size', options.fontSize + 'px')
      .text(function(d) { return d.data.name; });

      // UPDATE
      var nodeUpdate = nodeEnter.merge(node);

      // Transition to the proper position for the node
      nodeUpdate.transition()
      .duration(duration)
      .attr('transform', function(d) {
        return 'translate(' + d.y + ',' + d.x + ')';
      });

      // Update the node attributes and style
      nodeUpdate.select('circle.node')
      .attr('r', function(d) {
        return d.data.SizeOfNode || 10; // default radius is 10
      })
      .style('fill', function(d) {
        return d.data.fill || (d._children ? options.fill : '#fff');
      })
      .style('stroke-width', function(d) {
        return d._children ? 3 : 1;
      })
      .attr('cursor', 'pointer');


      // Remove any exiting nodes
      var nodeExit = node.exit().transition()
      .duration(duration)
      .attr('transform', function(d) {
        return 'translate(' + source.y + ',' + source.x + ')';
      })
      .remove();

      // On exit reduce the node circles size to 0
      nodeExit.select('circle')
      .attr('r', 1e-6);

      // On exit reduce the opacity of text labels
      nodeExit.select('text')
      .style('fill-opacity', 1e-6);

      // ****************** links section ***************************

      // Update the links...
      var link = svg.selectAll('path.link')
      .data(links, function(d) { return d.id; });

      // Enter any new links at the parent's previous position.
      var linkEnter = link.enter().insert('path', 'g')
      .attr('class', 'link')
      // Potentially, this may one day be mappable
      // .style('stroke-width', function(d) { return d.data.linkWidth || 1 })
      .attr('d', function(d){
        var o = { x: source.x0, y: source.y0 }
        return diagonal(o, o)
      });

      // UPDATE
      var linkUpdate = linkEnter.merge(link);

      // Transition back to the parent element position
      linkUpdate.transition()
      .duration(duration)
      .attr('d', function(d){ return diagonal(d, d.parent) });

      // Remove any exiting links
      var linkExit = link.exit().transition()
      .duration(duration)
      .attr('d', function(d) {
        var o = {x: source.x, y: source.y}
        return diagonal(o, o)
      })
      .remove();

      // Store the old positions for transition.
      nodes.forEach(function(d){
        d.x0 = d.x;
        d.y0 = d.y;
      });

      // Creates a curved (diagonal) path from parent to the child nodes
      function diagonal(s, d) {

        path = 'M ' + s.y + ' ' + s.x + ' C ' +
        (s.y + d.y) / 2 + ' ' + s.x + ', ' +
        (s.y + d.y) / 2 + ' ' + d.x + ', ' +
        d.y + ' ' + d.x;

        return path
      }

      // Toggle children on click.
      function click(d) {
        if (d.children) {
          d._children = d.children;
          d.children = null;
        } else {
          d.children = d._children;
          d._children = null;
        }
        update(d);
        // Hide the tooltip after clicking
        tooltip.transition()
        .duration(100)
        .style('opacity', 0)
        // Update Shiny inputs, if applicable
        if (options.input) {
          var nest = {},
          obj = d;
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            obj = obj.parent
          }
          Shiny.onInputChange(options.input, nest)
        }
      }

      // Show tooltip on mouseover
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        tooltip.transition()
        .duration(200)
        .style('opacity', .9);

        // Show either a constructed tooltip, or override with one from the data
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        )
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        .style('left', (d3.event.layerX) + 'px')
        .style('top', (d3.event.layerY - 30) + 'px');
      }
      // Hide tooltip on mouseout
      function mouseout(d) {
        tooltip.transition()
        .duration(500)
        .style('opacity', 0);
      }
    }

    return {
      renderValue: function(x) {
        // Assigns parent, children, height, depth
        root = d3.hierarchy(x.data, function(d) { return d.children; });
        root.x0 = height / 2;
        root.y0 = 0;

        // Attach options as a property of the instance
        options = x.options;

        // Update the canvas with the new dimensions
        svg = svg.attr('transform', 'translate('
        + options.margin.left + ',' + options.margin.top + ')')

        // width and height, corrected for margins
        var heightMargin = height - options.margin.top - options.margin.bottom,
        widthMargin = width - options.margin.left - options.margin.right;
        // declares a tree layout and assigns the size
        treemap = d3.tree().size([heightMargin, widthMargin])
        .separation(separationFun);

        // Calculate a reasonable link length, if not otherwise specified
        if (!options.linkLength) {
          options.linkResponsive = true
          options.linkLength = widthMargin / options.hierarchy.length
          if (options.linkLength < 10) {
            options.linkLength = 10 // Offscreen or too short
          }
        }

        // Optionally collapse after the second level
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        update(root);

        // Collapse the node and all it's children
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          if(d.children) {
            d._children = d.children
            d._children.forEach(collapse)
            d.children = null
          }
        }
      },

      resize: function(width, height) {
        // Resize the canvas
        d3.select(el).select('svg')
        .attr('width', width)
        .attr('height', height);

        // width and height, corrected for margins
        var heightMargin = height - options.margin.top - options.margin.bottom,
        widthMargin = width - options.margin.left - options.margin.right;

        // Calculate a reasonable link length, if not originally specified
        if (options.linkResponsive) {
          options.linkLength = widthMargin / options.hierarchy.length
          if (options.linkLength < 10) {
            options.linkLength = 10 // Offscreen or too short
          }
        }
        // Update the treemap to fit the new canvas size
        treemap = d3.tree().size([heightMargin, widthMargin])
        .separation(separationFun);
        update(root)
      },
      // Make the instance properties available as a property of the widget
      svg: svg,
      root: root,
      options: options
    };
  }
});

function separationFun(a, b) {
  var height = a.data.SizeOfNode + b.data.SizeOfNode,
  // Scale distance to SizeOfNode, if defined
  distance = (height || 20) / 10;
  return (a.parent === b.parent ? 1 : distance);
};
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