gistfile1.js

  planBuildingViewsDidChange: function() {
    var planBuildingViews = SC.A(this.get("planBuildingViews")),
        showResearch = (planBuildingViews.indexOf("siteResearch") > -1),
        showPlanning = (planBuildingViews.indexOf("planning") > -1),
        splitView = Research.mainPage.planBuilding,
        research = splitView.topLeftView,
        planning = splitView.bottomRightView,
        divider = splitView.dividerView,
        dividerThickness = splitView.dividerThickness,
        totalHeight = splitView.get("frame").height;

    if (showPlanning && showResearch) {
      var halfHeight = (totalHeight/2)-dividerThickness;
      planning.adjust("height", halfHeight);
      research.adjust("height", halfHeight);
      planning.adjust("top", halfHeight+dividerThickness);
      divider.adjust("top", halfHeight);
    } else if(showResearch) {
      planning.adjust("height", 0);
      research.adjust("height", totalHeight - dividerThickness);
      divider.adjust("top", totalHeight - dividerThickness);
    } else if (showPlanning) {
      research.adjust("height", 0);
      planning.adjust("top", 0);
      divider.adjust("top", 0);
    }
  }.observes(".planBuildingViews")