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POdisable/enable dropdown list options based on filtered D3.js data
 

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  1. POdisable/enable dropdown list options based on filtered D3.js data
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    <p>I have two dropdown lists that are dynamically populated from a database using PHP. They contain all values for a specified column e.g one contains all values for parameterType and the other all values for dateTimeTaken. </p> <p>Is there any way to disable any of these options when the data is filtered and some of these options may no longer be applicable - basically I'm asking if dynamically populated dropdown lists can be updated when the data is, if so, how this can be accomplished?</p> <p><strong>UPDATE:</strong></p> <p>My data is in following format:</p> <pre><code> [{"dateTimeTaken":"2013-01-01 14:05:14", "reading":"0.90000", "parameterType":"Flouride", "inspectionPoint_id":"2"}.... </code></pre> <p>and I've attempted to do this using following code - but not doing anything??</p> <pre><code> d3.json("HistoricData.php", function(error,data) { var filtered_data = data.filter(function(d) { return d.inspectionPoint_id == i;}) filtered_data.forEach(function(d) { d.dateTimeTaken = parseDate(d.dateTimeTaken); d.reading = +d.reading; d.parameterType = d.parameterType; d.inspectionPoint_id = +d.inspectionPoint_id; }); var check = d3.select("selectparameter")//select dropdown list check.selectAll("option").each(checkOption);//select all options //for any of the options that don't match the parameterType's //from the filtered dataset set display to none var checkOption = function (d, e) { if(e !== d.values(d.parameterType)){ return d3.select(this).attr("display", "none"); } }; </code></pre> <p><strong>UPDATE 2</strong></p> <pre><code> d3.select("#selectparameter") .append("select") .selectAll("option") .data(filtered_data) .enter().append("option") .text(function(d) { return d.parameterType; }) </code></pre> <p><img src="https://i.stack.imgur.com/c0L79.png" alt="enter image description here"></p>
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    1. COThis might be of help: http://stackoverflow.com/questions/13097923/how-can-i-use-d3-or-just-javascript-to-set-a-form-option-as-being-selected
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      1. USLars Kotthoff
    2. COThank you - that's shown me that it's possible but not sure how to implement this for what I need. I have attempted it - see update above.
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