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【JS】滑鼠移動方向外掛

(function($){ $.fn.extend({ show : function(div){ var w = this.width(), h = this.height(), xpos = w/2, ypos = h/2, eventType = "", direct = ""
; this.css({"overflow" : "hidden", "position" : "relative"}); div.css({"position" : "absolute", "top" : this.width()}); this.on("mouseenter mouseleave", function(e){ var oe = e || event; var x = oe.offsetX; var
y = oe.offsetY; var angle = Math.atan((x - xpos)/(y - ypos)) * 180 / Math.PI; if(angle > -45 && angle < 45 && y > ypos){ direct = "down"; } if(angle > -45
&& angle < 45 && y < ypos){ direct = "up"; } if(((angle > -90 && angle <-45) || (angle >45 && angle <90)) && x > xpos){ direct = "right"; } if(((angle > -90 && angle <-45) || (angle >45 && angle <90)) && x < xpos){ direct = "left"; } move(e.type, direct) }); function move(eventType, direct){ if(eventType == "mouseenter"){ switch(direct){ case "down": div.css({"left": "0px", "top": h}).stop(true,true).animate({"top": "0px"}, "fast"); break; case "up": div.css({"left": "0px", "top": -h}).stop(true,true).animate({"top": "0px"}, "fast"); break; case "right": div.css({"left": w, "top": "0px"}).stop(true,true).animate({"left": "0px"}, "fast"); break; case "left": div.css({"left": -w, "top": "0px"}).stop(true,true).animate({"left": "0px"}, "fast"); break; } }else{ switch(direct){ case "down": div.stop(true,true).animate({"top": h}, "fast"); break; case "up": div.stop(true,true).animate({"top": -h}, "fast"); break; case "right": div.stop(true,true).animate({"left": w}, "fast"); break; case "left": div.stop(true,true).animate({"left": -w}, "fast"); break; } } } } }); })(jQuery)