Created
September 6, 2012 22:05
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a sample of the code for a problem I'm trying to get solved
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| #controller method example | |
| def us_map | |
| @locations = LocationNode.where(:in_the_us => true).where('d_s > ?', 10) | |
| end | |
| #example of view | |
| <h1>US Map of Startup Density</h1> | |
| <% i = 0 %> | |
| <script type='text/javascript'> | |
| google.load('visualization', '1', {'packages': ['geochart']}); | |
| google.setOnLoadCallback(drawMarkersMap); | |
| function drawMarkersMap() { | |
| var data = google.visualization.arrayToDataTable([ | |
| ['Location', 'Startups'], | |
| # these (above) are the headers and can be set manually | |
| # the below is where I'm using ruby inside of the javascript | |
| # this was a mistake and rails cannot handle the below erb in | |
| # production mode | |
| <% @locations.count.times do %> | |
| [<%= "'#{@locations[i].name}', #{@locations[i].d_s}" %>], | |
| <% i += 1 ;end %> | |
| ]); | |
| var options = { | |
| region: 'US', | |
| resolution: 'provinces', | |
| displayMode: 'markers', | |
| magnifyingGlass: {enable: true, zoomFactor: 9.0}, | |
| colorAxis: {colors: ['green', 'blue']} | |
| }; | |
| var chart = new google.visualization.GeoChart(document.getElementById('chart_div')); | |
| chart.draw(data, options); | |
| }; | |
| </script> | |
| </head> | |
| <body> | |
| <h4>All cities with less than 10 startups have been exempted from this graph.</h4> | |
| <div id="chart_div" style="width: 900px; height: 500px;"></div> | |
| </body> |
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