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jquery.polartimer.js
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jquery.polartimer.js
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(function($) {
var seconds_left;
$.fn.polartimer = function(method) {
// Method calling logic
if(methods[method]) {
return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
} else if( typeof method === 'object' || !method) {
return methods.init.apply(this, arguments);
} else {
$.error('Method ' + method + ' does not exist on jQuery.polartimer');
}
};
var methods = {
init : function(options) {
var state = {
timerSeconds : 10,
callback : function() {
},
color : '#CCC',
opacity : 1
};
state = $.extend(state, options);
return this.each(function() {
var $this = $(this);
var data = $this.data('polartimer');
if(!data) {
$this.addClass('polartimer');
$this.height($this.width());
state.timer = null;
state.timerCurrent = 0;
state.pi2 = Math.PI * 2;
state.piOver2 = Math.PI / 2;
state.width = $this.width();
state.height = $this.height();
state.raphael = Raphael($this.context, state.width, state.height);
$this.data('polartimer', state);
}
});
},
stopWatch : function() {
return this.each(function() {
var data = $(this).data('polartimer');
if(data) {
var seconds = (data.timerFinish - (new Date().getTime())) / 1000;
if(seconds <= 0) {
clearInterval(data.timer);
$(this).polartimer('drawTimer', 100);
data.callback();
} else {
var percent = 100 - ((seconds / (data.timerSeconds)) * 100);
$(this).polartimer('drawTimer', percent);
}
}
});
},
drawTimer : function(percent) {
return this.each(function() {
$this = $(this);
var data = $this.data('polartimer');
if(data) {
var w = data.width;
var h = data.height;
var cx = w / 2;
data.raphael.clear();
if(percent == 100) {
data.raphael.circle(cx, cx, cx).attr({
fill : data.color,
stroke : 'none',
opacity : data.opacity
});
} else {
percent_left = percent;
var theta = data.pi2 * percent / 100 - data.piOver2;
var x1 = Math.cos(theta) * cx + cx;
var y1 = Math.sin(theta) * cx + cx;
var longArcFlag = (percent <= 50) ? 0 : 1;
var path = "M" + cx + "," + cx + " L" + cx + ",0 ";
path += "A" + cx + "," + cx + " 0 " + longArcFlag + ",1 " + x1 + "," + y1 + " ";
path += "L" + cx + "," + cx + "z";
var frame = data.raphael.path(path);
frame.attr({
fill : data.color,
stroke : 'none',
opacity : data.opacity
});
}
}
});
},
pause : function() {
return this.each(function() {
var data = $(this).data('polartimer');
seconds_left = (data.timerFinish - (new Date().getTime())) / 1000;
if(data) {
clearInterval(data.timer);
}
});
},
resume : function() {
return this.each(function() {
var data = $(this).data('polartimer');
if(data) {
clearInterval(data.timer);
data.timerFinish = new Date().getTime() + (seconds_left * 1000);
$(this).polartimer('drawTimer', 0);
data.timer = setInterval("$this.polartimer('stopWatch')", 50);
}
});
},
start : function() {
return this.each(function() {
var data = $(this).data('polartimer');
if(data) {
clearInterval(data.timer);
data.timerFinish = new Date().getTime() + (data.timerSeconds * 1000);
$(this).polartimer('drawTimer', 0);
data.timer = setInterval("$this.polartimer('stopWatch')", 50);
}
});
},
reset : function() {
return this.each(function() {
var data = $(this).data('polartimer');
if(data) {
clearInterval(data.timer);
$(this).polartimer('drawTimer', 0);
}
});
},
destroy : function() {
return this.each(function() {
var $this = $(this);
var data = $this.data('polartimer');
if(data) {
clearInterval(data.timer);
data.raphael.remove();
$this.removeData('polartimer');
}
});
}
};
})(jQuery);