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<!DOCTYPE html> <html> <head> <script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script> <title>HTML5, CSS3 and JavaScript demo</title> </head> <body> <!-- Start your code here --> <div id="area"> </div> <button id="button">add</button> <button id="addh">add h</button> <button id="addw">add w</button> <!-- End your code here --> </body> </html>
#area { height: 400px; width: 200px; background-color: #0000FF; } #area div{ background-color: #000000; float: left; border: 1px solid red; box-sizing: border-box; }
function calculateSquareSizeInArea(heightArea , widthArea, countSquare ){ var x=widthArea, y=heightArea, n=countSquare; var px=Math.ceil(Math.sqrt(n*x/y)); var sx,sy; if(Math.floor(px*y/x)*px<n) //does not fit, y/(x/px)=px*y/x sx = y/Math.ceil(px*y/x); else sx = x/px; var py= Math.ceil(Math.sqrt(n*y/x)); if(Math.floor(py*x/y)*py<n) //does not fit sy=x/Math.ceil(x*py/y); else sy=y/py; return Math.max(sx,sy); } var count = 0; function calc(){ $("#area div").remove(); var h = $("#area").height(); var w = $("#area").width(); var size = calculateSquareSizeInArea(h,w,count); for(var i =0;i<count;i++){ $("<div>").width(size).height(size).appendTo("#area"); } } $("#button").click(function(){ count++; calc(); }); $("#addh").click(function(){ $("#area").height($("#area").height()+5) ; calc(); }); $("#addw").click(function(){ $("#area").width($("#area").width()+5) ; calc(); });