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/*
* Kuma Gauge - v0.2
*
* Made by Sam Bellen for Kunstmaan
* - http:// www.kunstmaan.be
* - http:// www.sambellen.be
*
* Under MIT License
*/
;(function ( $, window, document, undefined ) {
var config = {
radius : 80,
paddingX : 40,
paddingY : 40,
gaugeWidth : 30,
fill : '0-#1cb42f:0-#fdbe37:50-#fa4133:100',
gaugeBackground : '#f4f4f4',
background : '#fff',
showNeedle : true,
animationSpeed : 500,
width : 0,
height : 0,
centerX : 0,
centerY : 0,
min : 0,
max : 100,
value : 80,
valueLabel : {
display : true,
fontFamily : 'Arial',
fontColor : '#000',
fontSize : '20',
fontWeight : 'normal'
},
title : {
display : true,
value : '',
fontFamily : 'Arial',
fontColor : '#000',
fontSize : '20',
fontWeight : 'normal'
},
label : {
display : true,
left : 'Low',
right : 'High',
fontFamily : 'Arial',
fontColor : '#000',
fontSize : '12',
fontWeight : 'normal'
}
};
// Create an arc with raphael.js
Raphael.fn.arc = function(startX, startY, endX, endY, radius1, radius2, angle) {
var arcSVG = [radius1, radius2, angle, 0, 1, endX, endY].join(' ');
return this.path('M' + startX + ' ' + startY + ' a ' + arcSVG);
};
// Calculate a circular arc with raphael.js
Raphael.fn.circularArc = function(centerX, centerY, radius, startAngle, endAngle) {
var startX = centerX + radius * Math.cos(startAngle * Math.PI / 180);
var startY = centerY + radius * Math.sin(startAngle * Math.PI / 180);
var endX = centerX + radius * Math.cos(endAngle * Math.PI / 180);
var endY = centerY + radius * Math.sin(endAngle * Math.PI / 180);
return this.arc(startX, startY, endX-startX, endY-startY, radius, radius, 0);
};
// The kuma Gauge constructor
function kumaGauge(element, options , method) {
// This
var _this = this;
// The element
_this.element = element;
_this.$element = $(element);
// The config
_this.config = $.extend( {}, config, options );
_this._config = config;
_this.method = method;
// The actual gauge
_this.gauge = {};
// Initialise
_this.init();
}
// Extend the kumaGauge object
kumaGauge.prototype = {
init: function () {
// this
_this = this;
if (!_this.method) {
_this.draw();
}
},
_setup : function() {
// This
_this = this;
// Calculate some values needed do draw the gauge
_this.config.width = (_this.config.radius * 2) + (_this.config.paddingX * 2);
_this.config.height = _this.config.radius + (_this.config.paddingY * 2);
_this.config.centerX = _this.config.paddingX + _this.config.radius;
_this.config.centerY = _this.config.paddingY + _this.config.radius;
// The div wich acts as the canvas needs an id, so we give it a unique one if it doesn't have one
if (typeof $(this).attr('id') === 'undefined' || $(this).attr('id') === '') {
_this.config.id = 'gauge-' + $('*[id^="gauge-"]').length;
_this.$element.attr('id', _this.config.id);
}
},
_calculateRotation : function(min, max, val) {
var _range, _rotation;
_range = max - min;
if (val < max && val > min) {
_rotation = 180 * ((val - min) / _range);
} else if (val <= min){
_rotation = 0;
} else {
_rotation = 180;
}
return _rotation;
},
draw : function() {
//this
var _this = this;
// Setup all the needed config variables
_this._setup();
// Make the base drawing Canvas
_this.gauge = new Raphael(_this.config.id, _this.config.width, _this.config.height);
// Draw the gauge
_this.gauge.gauge = _this.gauge.circularArc(_this.config.centerX, _this.config.centerY,
_this.config.radius, 180, 0);
_this.gauge.gauge.attr({
'fill' : _this.config.fill,
'stroke' : 'none'
});
_this.gauge.gauge.node.setAttribute('class', 'gauge');
// Draw the gauge background
_this.gauge.gaugeBackground = _this.gauge.circularArc(_this.config.centerX, _this.config.centerY,
_this.config.radius, 180, 0);
_this.gauge.gaugeBackground.attr({
'fill' : _this.config.gaugeBackground,
'stroke' : 'none'
});
_this.gauge.gaugeBackground.node.setAttribute('class', 'gauge__background');
// Draw the white center arc
_this.gauge.centerArc = _this.gauge.circularArc(_this.config.centerX, _this.config.centerY,
_this.config.radius - _this.config.gaugeWidth, 180, 0);
_this.gauge.centerArc.attr({
'fill' : _this.config.background,
'stroke' : 'none'
});
_this.gauge.centerArc.node.setAttribute('class', 'gauge__center');
// Draw the needle
if (_this.config.showNeedle) {
_this.gauge.needle = _this.gauge.rect(_this.config.centerX, _this.config.paddingY, 1, 40);
_this.gauge.needle.attr({
'fill' : '#000',
'stroke' : 'none'
});
_this.gauge.needle.node.setAttribute('class', 'gauge__needle');
}
// Draw the bottom mask to hide the rotated background arc
_this.gauge.bottomMask = _this.gauge.rect(0, _this.config.centerY, _this.config.width, 40);
_this.gauge.bottomMask.attr({
'fill' : _this.config.background,
'stroke' : 'none'
});
// Draw the text container for the value
if (_this.config.valueLabel.display) {
if (_this.config.showNeedle) {
_this.gauge.valueLabel = _this.gauge.text(_this.config.centerX, _this.config.centerY - 10,
Math.round((_this.config.max - _this.config.min) / 2));
} else {
_this.gauge.valueLabel = _this.gauge.text(_this.config.centerX, _this.config.centerY - 10,
_this.config.value);
}
_this.gauge.valueLabel.attr({
'fill' : _this.config.valueLabel.fontColor,
'font-size' : _this.config.valueLabel.fontSize,
'font-family' : _this.config.valueLabel.fontColor,
'font-weight' : _this.config.valueLabel.fontWeight
});
_this.gauge.valueLabel.node.setAttribute('class', 'gauge__value');
}
// Draw the title
if (_this.config.title.display) {
_this.gauge.title = _this.gauge.text(_this.config.centerX, _this.config.paddingY - 5,
_this.config.title.value);
_this.gauge.title.attr({
'fill' : _this.config.title.fontColor,
'fill-opacity' : 0,
'font-size' : _this.config.title.fontSize,
'font-family' : _this.config.title.fontFamily,
'font-weight' : _this.config.title.fontWeight
});
_this.gauge.title.node.setAttribute('class', 'gauge__title');
}
if (_this.config.label.display) {
// Draw the left label
_this.gauge.leftLabel = _this.gauge.text((_this.config.gaugeWidth / 2) + _this.config.paddingX,
_this.config.centerY + 10, _this.config.label.left);
_this.gauge.leftLabel.attr({
'fill' : _this.config.title.fontColor,
'fill-opacity' : 0,
'font-size' : _this.config.label.fontSize,
'font-family' : _this.config.label.fontFamily,
'font-weight' : _this.config.label.fontWeight
});
_this.gauge.leftLabel.node.setAttribute('class', 'gauge__label--left');
// Draw the right label
_this.gauge.rightLabel = _this.gauge.text((_this.config.width - (_this.config.gaugeWidth / 2)) - _this.config.paddingX,
_this.config.centerY + 10, _this.config.label.right);
_this.gauge.rightLabel.attr({
'fill' : _this.config.title.fontColor,
'fill-opacity' : 0,
'font-size' : _this.config.label.fontSize,
'font-family' : _this.config.label.fontFamily,
'font-weight' : _this.config.label.fontWeight
});
_this.gauge.rightLabel.node.setAttribute('class', 'gauge__label--right');
}
// There is a bug with raphael.js and webkit which renders text element at double the Y value.
// Resetting the Y values after a timeout fixes this.
// See https://github.com/DmitryBaranovskiy/raphael/issues/491
setTimeout(function() {
if (_this.config.valueLabel.display) {
_this.gauge.valueLabel.attr('y', _this.config.centerY - 10);
}
if (_this.config.title.display) {
_this.gauge.title.attr({
'y' : _this.config.paddingY - (_this.gauge.title.getBBox().height / 2),
'fill-opacity' : 1
});
}
if (_this.config.label.display) {
_this.gauge.leftLabel.attr({
'y' : _this.config.centerY + (_this.gauge.leftLabel.getBBox().height / 2),
'fill-opacity' : 1,
});
_this.gauge.rightLabel.attr({
'y' : _this.config.centerY + (_this.gauge.rightLabel.getBBox().height / 2),
'fill-opacity' : 1,
});
}
}, 1000);
// Animate the gauge to the right value position
_this.gauge.gaugeBackground.animate({transform:'r' +
_this._calculateRotation(_this.config.min, _this.config.max, _this.config.value) + ',' +
_this.config.centerX + ',' + _this.config.centerY}, _this.config.animationSpeed, '<>');
},
update: function (data) {
//this
var _this = this;
var updateGauge = function(min, max, value) {
_this.config.min = min;
_this.config.max = max;
_this.config.value = value;
// Update the rotation of the gauge
_this.gauge.gaugeBackground.animate({transform:'r' +
_this._calculateRotation(min, max, value) + ',' +
_this.config.centerX + ',' + _this.config.centerY}, _this.config.animationSpeed, '<>');
// Update the value label
if (_this.config.valueLabel.display) {
if (_this.config.showNeedle) {
_this.gauge.valueLabel.attr('text', value);
} else {
_this.gauge.valueLabel.attr('text', (max - min) / 2);
}
}
};
if (typeof data.min !== 'undefined' && typeof data.max !== 'undefined' && typeof data.value !== 'undefined') {
updateGauge(data.min, data.max, data.value);
} else if (typeof data.value !== 'undefined') {
updateGauge(_this.config.min, _this.config.max, data.value);
}
}
};
$.fn.kumaGauge = function ( method, options ) {
var _method = method,
_arguments = arguments,
_this = this;
if (typeof _method !== 'string') {
if (_arguments.length === 1 ) {
options = _method;
method = false;
return this.each(function() {
if ( !$.data( this, 'kumaGauge' ) ) {
$.data( this, 'kumaGauge', new kumaGauge( this, options, method ) );
}
});
}
} else {
return this.each(function() {
if (typeof $.data(this, 'kumaGauge')[method] === 'function') {
$.data(this, 'kumaGauge')[method](options);
}
});
}
};
})( jQuery, window, document );
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