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square / rectangle entry position
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| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Document</title> | |
| <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> | |
| </head> | |
| <body> | |
| <div id="square" style="background-color: #ccc; width:200px; height:140px;"> | |
| <p id="text_direction"></p> | |
| </div> | |
| <script> | |
| function getQuadrant(x, y, width, height) { | |
| var center = { | |
| x: x - width / 2, | |
| y: y - height / 2 | |
| }, | |
| diag = center.x / width * height; | |
| if (center.y < -diag && center.y < diag) | |
| direction = "Top"; | |
| else if (center.y < -diag && center.y >= diag) | |
| direction = "Left"; | |
| else if (center.y >= -diag && center.y >= diag) | |
| direction = "Bottom"; | |
| else if (center.y >= -diag && center.y < diag) | |
| direction = "Right"; | |
| else alert("failed"); | |
| return direction; | |
| } | |
| $('#square').mouseover(function(e) { | |
| var squareHeight = $(this).outerHeight(); | |
| var squareWidth = $(this).outerWidth(); | |
| var vertiPos = e.pageY - this.offsetTop; | |
| var horizPos = e.pageX - this.offsetLeft; | |
| var pos = getQuadrant(horizPos, vertiPos, squareWidth, squareHeight); | |
| console.log(pos); | |
| //just dom crap here for the text that shows in the square | |
| $('#text_direction').text(pos); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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