assets/javascripts/jquery/jquery.jqplot/plugins/jqplot.meterGaugeRenderer.js
/**
* jqPlot
* Pure JavaScript plotting plugin using jQuery
*
* Version: 1.0.0
* Revision: 1095
*
* Copyright (c) 2009-2011 Chris Leonello
* jqPlot is currently available for use in all personal or commercial projects
* under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL
* version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can
* choose the license that best suits your project and use it accordingly.
*
* Although not required, the author would appreciate an email letting him
* know of any substantial use of jqPlot. You can reach the author at:
* chris at jqplot dot com or see http://www.jqplot.com/info.php .
*
* If you are feeling kind and generous, consider supporting the project by
* making a donation at: http://www.jqplot.com/donate.php .
*
* sprintf functions contained in jqplot.sprintf.js by Ash Searle:
*
* version 2007.04.27
* author Ash Searle
* http://hexmen.com/blog/2007/03/printf-sprintf/
* http://hexmen.com/js/sprintf.js
* The author (Ash Searle) has placed this code in the public domain:
* "This code is unrestricted: you are free to use it however you like."
*
*/
(function($) {
/**
* Class: $.jqplot.MeterGaugeRenderer
* Plugin renderer to draw a meter gauge chart.
*
* Data consists of a single series with 1 data point to position the gauge needle.
*
* To use this renderer, you need to include the
* meter gauge renderer plugin, for example:
*
* > <script type="text/javascript" src="plugins/jqplot.meterGaugeRenderer.js"></script>
*
* Properties described here are passed into the $.jqplot function
* as options on the series renderer. For example:
*
* > plot0 = $.jqplot('chart0',[[18]],{
* > title: 'Network Speed',
* > seriesDefaults: {
* > renderer: $.jqplot.MeterGaugeRenderer,
* > rendererOptions: {
* > label: 'MB/s'
* > }
* > }
* > });
*
* A meterGauge plot does not support events.
*/
$.jqplot.MeterGaugeRenderer = function(){
$.jqplot.LineRenderer.call(this);
};
$.jqplot.MeterGaugeRenderer.prototype = new $.jqplot.LineRenderer();
$.jqplot.MeterGaugeRenderer.prototype.constructor = $.jqplot.MeterGaugeRenderer;
// called with scope of a series
$.jqplot.MeterGaugeRenderer.prototype.init = function(options) {
// Group: Properties
//
// prop: diameter
// Outer diameter of the meterGauge, auto computed by default
this.diameter = null;
// prop: padding
// padding between the meterGauge and plot edges, auto
// calculated by default.
this.padding = null;
// prop: shadowOffset
// offset of the shadow from the gauge ring and offset of
// each succesive stroke of the shadow from the last.
this.shadowOffset = 2;
// prop: shadowAlpha
// transparency of the shadow (0 = transparent, 1 = opaque)
this.shadowAlpha = 0.07;
// prop: shadowDepth
// number of strokes to apply to the shadow,
// each stroke offset shadowOffset from the last.
this.shadowDepth = 4;
// prop: background
// background color of the inside of the gauge.
this.background = "#efefef";
// prop: ringColor
// color of the outer ring, hub, and needle of the gauge.
this.ringColor = "#BBC6D0";
// needle color not implemented yet.
this.needleColor = "#C3D3E5";
// prop: tickColor
// color of the tick marks around the gauge.
this.tickColor = "989898";
// prop: ringWidth
// width of the ring around the gauge. Auto computed by default.
this.ringWidth = null;
// prop: min
// Minimum value on the gauge. Auto computed by default
this.min;
// prop: max
// Maximum value on the gauge. Auto computed by default
this.max;
// prop: ticks
// Array of tick values. Auto computed by default.
this.ticks = [];
// prop: showTicks
// true to show ticks around gauge.
this.showTicks = true;
// prop: showTickLabels
// true to show tick labels next to ticks.
this.showTickLabels = true;
// prop: label
// A gauge label like 'kph' or 'Volts'
this.label = null;
// prop: labelHeightAdjust
// Number of Pixels to offset the label up (-) or down (+) from its default position.
this.labelHeightAdjust = 0;
// prop: labelPosition
// Where to position the label, either 'inside' or 'bottom'.
this.labelPosition = 'inside';
// prop: intervals
// Array of ranges to be drawn around the gauge.
// Array of form:
// > [value1, value2, ...]
// indicating the values for the first, second, ... intervals.
this.intervals = [];
// prop: intervalColors
// Array of colors to use for the intervals.
this.intervalColors = [ "#4bb2c5", "#EAA228", "#c5b47f", "#579575", "#839557", "#958c12", "#953579", "#4b5de4", "#d8b83f", "#ff5800", "#0085cc", "#c747a3", "#cddf54", "#FBD178", "#26B4E3", "#bd70c7"];
// prop: intervalInnerRadius
// Radius of the inner circle of the interval ring.
this.intervalInnerRadius = null;
// prop: intervalOuterRadius
// Radius of the outer circle of the interval ring.
this.intervalOuterRadius = null;
this.tickRenderer = $.jqplot.MeterGaugeTickRenderer;
// ticks spaced every 1, 2, 2.5, 5, 10, 20, .1, .2, .25, .5, etc.
this.tickPositions = [1, 2, 2.5, 5, 10];
// prop: tickSpacing
// Degrees between ticks. This is a target number, if
// incompatible span and ticks are supplied, a suitable
// spacing close to this value will be computed.
this.tickSpacing = 30;
this.numberMinorTicks = null;
// prop: hubRadius
// Radius of the hub at the bottom center of gauge which the needle attaches to.
// Auto computed by default
this.hubRadius = null;
// prop: tickPadding
// padding of the tick marks to the outer ring and the tick labels to marks.
// Auto computed by default.
this.tickPadding = null;
// prop: needleThickness
// Maximum thickness the needle. Auto computed by default.
this.needleThickness = null;
// prop: needlePad
// Padding between needle and inner edge of the ring when the needle is at the min or max gauge value.
this.needlePad = 6;
// prop: pegNeedle
// True will stop needle just below/above the min/max values if data is below/above min/max,
// as if the meter is "pegged".
this.pegNeedle = true;
this._type = 'meterGauge';
$.extend(true, this, options);
this.type = null;
this.numberTicks = null;
this.tickInterval = null;
// span, the sweep (in degrees) from min to max. This gauge is
// a semi-circle.
this.span = 180;
// get rid of this nonsense
// this.innerSpan = this.span;
if (this.type == 'circular') {
this.semiCircular = false;
}
else if (this.type != 'circular') {
this.semiCircular = true;
}
else {
this.semiCircular = (this.span <= 180) ? true : false;
}
this._tickPoints = [];
// reference to label element.
this._labelElem = null;
// start the gauge at the beginning of the span
this.startAngle = (90 + (360 - this.span)/2) * Math.PI/180;
this.endAngle = (90 - (360 - this.span)/2) * Math.PI/180;
this.setmin = !!(this.min == null);
this.setmax = !!(this.max == null);
// if given intervals and is an array of values, create labels and colors.
if (this.intervals.length) {
if (this.intervals[0].length == null || this.intervals.length == 1) {
for (var i=0; i<this.intervals.length; i++) {
this.intervals[i] = [this.intervals[i], this.intervals[i], this.intervalColors[i]];
}
}
else if (this.intervals[0].length == 2) {
for (i=0; i<this.intervals.length; i++) {
this.intervals[i] = [this.intervals[i][0], this.intervals[i][1], this.intervalColors[i]];
}
}
}
// compute min, max and ticks if not supplied:
if (this.ticks.length) {
if (this.ticks[0].length == null || this.ticks[0].length == 1) {
for (var i=0; i<this.ticks.length; i++) {
this.ticks[i] = [this.ticks[i], this.ticks[i]];
}
}
this.min = (this.min == null) ? this.ticks[0][0] : this.min;
this.max = (this.max == null) ? this.ticks[this.ticks.length-1][0] : this.max;
this.setmin = false;
this.setmax = false;
this.numberTicks = this.ticks.length;
this.tickInterval = this.ticks[1][0] - this.ticks[0][0];
this.tickFactor = Math.floor(parseFloat((Math.log(this.tickInterval)/Math.log(10)).toFixed(11)));
// use the first interal to calculate minor ticks;
this.numberMinorTicks = getnmt(this.tickPositions, this.tickInterval, this.tickFactor);
if (!this.numberMinorTicks) {
this.numberMinorTicks = getnmt(this.tickPositions, this.tickInterval, this.tickFactor-1);
}
if (!this.numberMinorTicks) {
this.numberMinorTicks = 1;
}
}
else if (this.intervals.length) {
this.min = (this.min == null) ? 0 : this.min;
this.setmin = false;
if (this.max == null) {
if (this.intervals[this.intervals.length-1][0] >= this.data[0][1]) {
this.max = this.intervals[this.intervals.length-1][0];
this.setmax = false;
}
}
else {
this.setmax = false;
}
}
else {
// no ticks and no intervals supplied, put needle in middle
this.min = (this.min == null) ? 0 : this.min;
this.setmin = false;
if (this.max == null) {
this.max = this.data[0][1] * 1.25;
this.setmax = true;
}
else {
this.setmax = false;
}
}
};
$.jqplot.MeterGaugeRenderer.prototype.setGridData = function(plot) {
// set gridData property. This will hold angle in radians of each data point.
var stack = [];
var td = [];
var sa = this.startAngle;
for (var i=0; i<this.data.length; i++){
stack.push(this.data[i][1]);
td.push([this.data[i][0]]);
if (i>0) {
stack[i] += stack[i-1];
}
}
var fact = Math.PI*2/stack[stack.length - 1];
for (var i=0; i<stack.length; i++) {
td[i][1] = stack[i] * fact;
}
this.gridData = td;
};
$.jqplot.MeterGaugeRenderer.prototype.makeGridData = function(data, plot) {
var stack = [];
var td = [];
var sa = this.startAngle;
for (var i=0; i<data.length; i++){
stack.push(data[i][1]);
td.push([data[i][0]]);
if (i>0) {
stack[i] += stack[i-1];
}
}
var fact = Math.PI*2/stack[stack.length - 1];
for (var i=0; i<stack.length; i++) {
td[i][1] = stack[i] * fact;
}
return td;
};
function getnmt(pos, interval, fact) {
var temp;
for (var i=pos.length-1; i>=0; i--) {
temp = interval/(pos[i] * Math.pow(10, fact));
if (temp == 4 || temp == 5) {
return temp - 1;
}
}
return null;
}
// called with scope of series
$.jqplot.MeterGaugeRenderer.prototype.draw = function (ctx, gd, options) {
var i;
var opts = (options != undefined) ? options : {};
// offset and direction of offset due to legend placement
var offx = 0;
var offy = 0;
var trans = 1;
if (options.legendInfo && options.legendInfo.placement == 'inside') {
var li = options.legendInfo;
switch (li.location) {
case 'nw':
offx = li.width + li.xoffset;
break;
case 'w':
offx = li.width + li.xoffset;
break;
case 'sw':
offx = li.width + li.xoffset;
break;
case 'ne':
offx = li.width + li.xoffset;
trans = -1;
break;
case 'e':
offx = li.width + li.xoffset;
trans = -1;
break;
case 'se':
offx = li.width + li.xoffset;
trans = -1;
break;
case 'n':
offy = li.height + li.yoffset;
break;
case 's':
offy = li.height + li.yoffset;
trans = -1;
break;
default:
break;
}
}
// pre-draw so can get it's dimensions.
if (this.label) {
this._labelElem = $('<div class="jqplot-meterGauge-label" style="position:absolute;">'+this.label+'</div>');
this.canvas._elem.after(this._labelElem);
}
var shadow = (opts.shadow != undefined) ? opts.shadow : this.shadow;
var showLine = (opts.showLine != undefined) ? opts.showLine : this.showLine;
var fill = (opts.fill != undefined) ? opts.fill : this.fill;
var cw = ctx.canvas.width;
var ch = ctx.canvas.height;
if (this.padding == null) {
this.padding = Math.round(Math.min(cw, ch)/30);
}
var w = cw - offx - 2 * this.padding;
var h = ch - offy - 2 * this.padding;
if (this.labelPosition == 'bottom' && this.label) {
h -= this._labelElem.outerHeight(true);
}
var mindim = Math.min(w,h);
var d = mindim;
if (!this.diameter) {
if (this.semiCircular) {
if ( w >= 2*h) {
if (!this.ringWidth) {
this.ringWidth = 2*h/35;
}
this.needleThickness = this.needleThickness || 2+Math.pow(this.ringWidth, 0.8);
this.innerPad = this.ringWidth/2 + this.needleThickness/2 + this.needlePad;
this.diameter = 2 * (h - 2*this.innerPad);
}
else {
if (!this.ringWidth) {
this.ringWidth = w/35;
}
this.needleThickness = this.needleThickness || 2+Math.pow(this.ringWidth, 0.8);
this.innerPad = this.ringWidth/2 + this.needleThickness/2 + this.needlePad;
this.diameter = w - 2*this.innerPad - this.ringWidth - this.padding;
}
// center taking into account legend and over draw for gauge bottom below hub.
// this will be center of hub.
this._center = [(cw - trans * offx)/2 + trans * offx, (ch + trans*offy - this.padding - this.ringWidth - this.innerPad)];
}
else {
if (!this.ringWidth) {
this.ringWidth = d/35;
}
this.needleThickness = this.needleThickness || 2+Math.pow(this.ringWidth, 0.8);
this.innerPad = 0;
this.diameter = d - this.ringWidth;
// center in middle of canvas taking into account legend.
// will be center of hub.
this._center = [(cw-trans*offx)/2 + trans * offx, (ch-trans*offy)/2 + trans * offy];
}
}
if (this._labelElem && this.labelPosition == 'bottom') {
this._center[1] -= this._labelElem.outerHeight(true);
}
this._radius = this.diameter/2;
this.tickSpacing = 6000/this.diameter;
if (!this.hubRadius) {
this.hubRadius = this.diameter/18;
}
this.shadowOffset = 0.5 + this.ringWidth/9;
this.shadowWidth = this.ringWidth*1;
this.tickPadding = 3 + Math.pow(this.diameter/20, 0.7);
this.tickOuterRadius = this._radius - this.ringWidth/2 - this.tickPadding;
this.tickLength = (this.showTicks) ? this._radius/13 : 0;
if (this.ticks.length == 0) {
// no ticks, lets make some.
var max = this.max,
min = this.min,
setmax = this.setmax,
setmin = this.setmin,
ti = (max - min) * this.tickSpacing / this.span;
var tf = Math.floor(parseFloat((Math.log(ti)/Math.log(10)).toFixed(11)));
var tp = (ti/Math.pow(10, tf));
(tp > 2 && tp <= 2.5) ? tp = 2.5 : tp = Math.ceil(tp);
var t = this.tickPositions;
var tpindex, nt;
for (i=0; i<t.length; i++) {
if (tp == t[i] || i && t[i-1] < tp && tp < t[i]) {
ti = t[i]*Math.pow(10, tf);
tpindex = i;
}
}
for (i=0; i<t.length; i++) {
if (tp == t[i] || i && t[i-1] < tp && tp < t[i]) {
ti = t[i]*Math.pow(10, tf);
nt = Math.ceil((max - min) / ti);
}
}
// both max and min are free
if (setmax && setmin) {
var tmin = (min > 0) ? min - min % ti : min - min % ti - ti;
if (!this.forceZero) {
var diff = Math.min(min - tmin, 0.8*ti);
var ntp = Math.floor(diff/t[tpindex]);
if (ntp > 1) {
tmin = tmin + t[tpindex] * (ntp-1);
if (parseInt(tmin, 10) != tmin && parseInt(tmin-t[tpindex], 10) == tmin-t[tpindex]) {
tmin = tmin - t[tpindex];
}
}
}
if (min == tmin) {
min -= ti;
}
else {
// tmin should always be lower than dataMin
if (min - tmin > 0.23*ti) {
min = tmin;
}
else {
min = tmin -ti;
nt += 1;
}
}
nt += 1;
var tmax = min + (nt - 1) * ti;
if (max >= tmax) {
tmax += ti;
nt += 1;
}
// now tmax should always be mroe than dataMax
if (tmax - max < 0.23*ti) {
tmax += ti;
nt += 1;
}
this.max = max = tmax;
this.min = min;
this.tickInterval = ti;
this.numberTicks = nt;
var it;
for (i=0; i<nt; i++) {
it = parseFloat((min+i*ti).toFixed(11));
this.ticks.push([it, it]);
}
this.max = this.ticks[nt-1][1];
this.tickFactor = tf;
// determine number of minor ticks
this.numberMinorTicks = getnmt(this.tickPositions, this.tickInterval, this.tickFactor);
if (!this.numberMinorTicks) {
this.numberMinorTicks = getnmt(this.tickPositions, this.tickInterval, this.tickFactor-1);
}
}
// max is free, min is fixed
else if (setmax) {
var tmax = min + (nt - 1) * ti;
if (max >= tmax) {
max = tmax + ti;
nt += 1;
}
else {
max = tmax;
}
this.tickInterval = this.tickInterval || ti;
this.numberTicks = this.numberTicks || nt;
var it;
for (i=0; i<this.numberTicks; i++) {
it = parseFloat((min+i*this.tickInterval).toFixed(11));
this.ticks.push([it, it]);
}
this.max = this.ticks[this.numberTicks-1][1];
this.tickFactor = tf;
// determine number of minor ticks
this.numberMinorTicks = getnmt(this.tickPositions, this.tickInterval, this.tickFactor);
if (!this.numberMinorTicks) {
this.numberMinorTicks = getnmt(this.tickPositions, this.tickInterval, this.tickFactor-1);
}
}
// not setting max or min
if (!setmax && !setmin) {
var range = this.max - this.min;
tf = Math.floor(parseFloat((Math.log(range)/Math.log(10)).toFixed(11))) - 1;
var nticks = [5,6,4,7,3,8,9,10,2], res, numticks, nonSigDigits=0, sigRange;
// check to see how many zeros are at the end of the range
if (range > 1) {
var rstr = String(range);
if (rstr.search(/\./) == -1) {
var pos = rstr.search(/0+$/);
nonSigDigits = (pos > 0) ? rstr.length - pos - 1 : 0;
}
}
sigRange = range/Math.pow(10, nonSigDigits);
for (i=0; i<nticks.length; i++) {
res = sigRange/(nticks[i]-1);
if (res == parseInt(res, 10)) {
this.numberTicks = nticks[i];
this.tickInterval = range/(this.numberTicks-1);
this.tickFactor = tf+1;
break;
}
}
var it;
for (i=0; i<this.numberTicks; i++) {
it = parseFloat((this.min+i*this.tickInterval).toFixed(11));
this.ticks.push([it, it]);
}
// determine number of minor ticks
this.numberMinorTicks = getnmt(this.tickPositions, this.tickInterval, this.tickFactor);
if (!this.numberMinorTicks) {
this.numberMinorTicks = getnmt(this.tickPositions, this.tickInterval, this.tickFactor-1);
}
if (!this.numberMinorTicks) {
this.numberMinorTicks = 1;
var nums = [4, 5, 3, 6, 2];
for (i=0; i<5; i++) {
var temp = this.tickInterval/nums[i];
if (temp == parseInt(temp, 10)) {
this.numberMinorTicks = nums[i]-1;
break;
}
}
}
}
}
var r = this._radius,
sa = this.startAngle,
ea = this.endAngle,
pi = Math.PI,
hpi = Math.PI/2;
if (this.semiCircular) {
var overAngle = Math.atan(this.innerPad/r),
outersa = this.outerStartAngle = sa - overAngle,
outerea = this.outerEndAngle = ea + overAngle,
hubsa = this.hubStartAngle = sa - Math.atan(this.innerPad/this.hubRadius*2),
hubea = this.hubEndAngle = ea + Math.atan(this.innerPad/this.hubRadius*2);
ctx.save();
ctx.translate(this._center[0], this._center[1]);
ctx.lineJoin = "round";
ctx.lineCap = "round";
// draw the innerbackground
ctx.save();
ctx.beginPath();
ctx.fillStyle = this.background;
ctx.arc(0, 0, r, outersa, outerea, false);
ctx.closePath();
ctx.fill();
ctx.restore();
// draw the shadow
// the outer ring.
var shadowColor = 'rgba(0,0,0,'+this.shadowAlpha+')';
ctx.save();
for (var i=0; i<this.shadowDepth; i++) {
ctx.translate(this.shadowOffset*Math.cos(this.shadowAngle/180*Math.PI), this.shadowOffset*Math.sin(this.shadowAngle/180*Math.PI));
ctx.beginPath();
ctx.strokeStyle = shadowColor;
ctx.lineWidth = this.shadowWidth;
ctx.arc(0 ,0, r, outersa, outerea, false);
ctx.closePath();
ctx.stroke();
}
ctx.restore();
// the inner hub.
ctx.save();
var tempd = parseInt((this.shadowDepth+1)/2, 10);
for (var i=0; i<tempd; i++) {
ctx.translate(this.shadowOffset*Math.cos(this.shadowAngle/180*Math.PI), this.shadowOffset*Math.sin(this.shadowAngle/180*Math.PI));
ctx.beginPath();
ctx.fillStyle = shadowColor;
ctx.arc(0 ,0, this.hubRadius, hubsa, hubea, false);
ctx.closePath();
ctx.fill();
}
ctx.restore();
// draw the outer ring.
ctx.save();
ctx.beginPath();
ctx.strokeStyle = this.ringColor;
ctx.lineWidth = this.ringWidth;
ctx.arc(0 ,0, r, outersa, outerea, false);
ctx.closePath();
ctx.stroke();
ctx.restore();
// draw the hub
ctx.save();
ctx.beginPath();
ctx.fillStyle = this.ringColor;
ctx.arc(0 ,0, this.hubRadius,hubsa, hubea, false);
ctx.closePath();
ctx.fill();
ctx.restore();
// draw the ticks
if (this.showTicks) {
ctx.save();
var orad = this.tickOuterRadius,
tl = this.tickLength,
mtl = tl/2,
nmt = this.numberMinorTicks,
ts = this.span * Math.PI / 180 / (this.ticks.length-1),
mts = ts/(nmt + 1);
for (i = 0; i<this.ticks.length; i++) {
ctx.beginPath();
ctx.lineWidth = 1.5 + this.diameter/360;
ctx.strokeStyle = this.ringColor;
var wps = ts*i+sa;
ctx.moveTo(-orad * Math.cos(ts*i+sa), orad * Math.sin(ts*i+sa));
ctx.lineTo(-(orad-tl) * Math.cos(ts*i+sa), (orad - tl) * Math.sin(ts*i+sa));
this._tickPoints.push([(orad-tl) * Math.cos(ts*i+sa) + this._center[0] + this.canvas._offsets.left, (orad - tl) * Math.sin(ts*i+sa) + this._center[1] + this.canvas._offsets.top, ts*i+sa]);
ctx.stroke();
ctx.lineWidth = 1.0 + this.diameter/440;
if (i<this.ticks.length-1) {
for (var j=1; j<=nmt; j++) {
ctx.beginPath();
ctx.moveTo(-orad * Math.cos(ts*i+mts*j+sa), orad * Math.sin(ts*i+mts*j+sa));
ctx.lineTo(-(orad-mtl) * Math.cos(ts*i+mts*j+sa), (orad-mtl) * Math.sin(ts*i+mts*j+sa));
ctx.stroke();
}
}
}
ctx.restore();
}
// draw the tick labels
if (this.showTickLabels) {
var elem, l, t, ew, eh, dim, maxdim=0;
var tp = this.tickPadding * (1 - 1/(this.diameter/80+1));
for (i=0; i<this.ticks.length; i++) {
elem = $('<div class="jqplot-meterGauge-tick" style="position:absolute;">'+this.ticks[i][1]+'</div>');
this.canvas._elem.after(elem);
ew = elem.outerWidth(true);
eh = elem.outerHeight(true);
l = this._tickPoints[i][0] - ew * (this._tickPoints[i][2]-Math.PI)/Math.PI - tp * Math.cos(this._tickPoints[i][2]);
t = this._tickPoints[i][1] - eh/2 + eh/2 * Math.pow(Math.abs((Math.sin(this._tickPoints[i][2]))), 0.5) + tp/3 * Math.pow(Math.abs((Math.sin(this._tickPoints[i][2]))), 0.5) ;
// t = this._tickPoints[i][1] - eh/2 - eh/2 * Math.sin(this._tickPoints[i][2]) - tp/2 * Math.sin(this._tickPoints[i][2]);
elem.css({left:l, top:t});
dim = ew*Math.cos(this._tickPoints[i][2]) + eh*Math.sin(Math.PI/2+this._tickPoints[i][2]/2);
maxdim = (dim > maxdim) ? dim : maxdim;
}
}
// draw the gauge label
if (this.label && this.labelPosition == 'inside') {
var l = this._center[0] + this.canvas._offsets.left;
var tp = this.tickPadding * (1 - 1/(this.diameter/80+1));
var t = 0.5*(this._center[1] + this.canvas._offsets.top - this.hubRadius) + 0.5*(this._center[1] + this.canvas._offsets.top - this.tickOuterRadius + this.tickLength + tp) + this.labelHeightAdjust;
// this._labelElem = $('<div class="jqplot-meterGauge-label" style="position:absolute;">'+this.label+'</div>');
// this.canvas._elem.after(this._labelElem);
l -= this._labelElem.outerWidth(true)/2;
t -= this._labelElem.outerHeight(true)/2;
this._labelElem.css({left:l, top:t});
}
else if (this.label && this.labelPosition == 'bottom') {
var l = this._center[0] + this.canvas._offsets.left - this._labelElem.outerWidth(true)/2;
var t = this._center[1] + this.canvas._offsets.top + this.innerPad + + this.ringWidth + this.padding + this.labelHeightAdjust;
this._labelElem.css({left:l, top:t});
}
// draw the intervals
ctx.save();
var inner = this.intervalInnerRadius || this.hubRadius * 1.5;
if (this.intervalOuterRadius == null) {
if (this.showTickLabels) {
var outer = (this.tickOuterRadius - this.tickLength - this.tickPadding - this.diameter/8);
}
else {
var outer = (this.tickOuterRadius - this.tickLength - this.diameter/16);
}
}
else {
var outer = this.intervalOuterRadius;
}
var range = this.max - this.min;
var intrange = this.intervals[this.intervals.length-1] - this.min;
var start, end, span = this.span*Math.PI/180;
for (i=0; i<this.intervals.length; i++) {
start = (i == 0) ? sa : sa + (this.intervals[i-1][0] - this.min)*span/range;
if (start < 0) {
start = 0;
}
end = sa + (this.intervals[i][0] - this.min)*span/range;
if (end < 0) {
end = 0;
}
ctx.beginPath();
ctx.fillStyle = this.intervals[i][2];
ctx.arc(0, 0, inner, start, end, false);
ctx.lineTo(outer*Math.cos(end), outer*Math.sin(end));
ctx.arc(0, 0, outer, end, start, true);
ctx.lineTo(inner*Math.cos(start), inner*Math.sin(start));
ctx.closePath();
ctx.fill();
}
ctx.restore();
// draw the needle
var datapoint = this.data[0][1];
var dataspan = this.max - this.min;
if (this.pegNeedle) {
if (this.data[0][1] > this.max + dataspan*3/this.span) {
datapoint = this.max + dataspan*3/this.span;
}
if (this.data[0][1] < this.min - dataspan*3/this.span) {
datapoint = this.min - dataspan*3/this.span;
}
}
var dataang = (datapoint - this.min)/dataspan * this.span * Math.PI/180 + this.startAngle;
ctx.save();
ctx.beginPath();
ctx.fillStyle = this.ringColor;
ctx.strokeStyle = this.ringColor;
this.needleLength = (this.tickOuterRadius - this.tickLength) * 0.85;
this.needleThickness = (this.needleThickness < 2) ? 2 : this.needleThickness;
var endwidth = this.needleThickness * 0.4;
var dl = this.needleLength/10;
var dt = (this.needleThickness - endwidth)/10;
var templ;
for (var i=0; i<10; i++) {
templ = this.needleThickness - i*dt;
ctx.moveTo(dl*i*Math.cos(dataang), dl*i*Math.sin(dataang));
ctx.lineWidth = templ;
ctx.lineTo(dl*(i+1)*Math.cos(dataang), dl*(i+1)*Math.sin(dataang));
ctx.stroke();
}
ctx.restore();
}
else {
this._center = [(cw - trans * offx)/2 + trans * offx, (ch - trans*offy)/2 + trans * offy];
}
};
$.jqplot.MeterGaugeAxisRenderer = function() {
$.jqplot.LinearAxisRenderer.call(this);
};
$.jqplot.MeterGaugeAxisRenderer.prototype = new $.jqplot.LinearAxisRenderer();
$.jqplot.MeterGaugeAxisRenderer.prototype.constructor = $.jqplot.MeterGaugeAxisRenderer;
// There are no traditional axes on a gauge chart. We just need to provide
// dummy objects with properties so the plot will render.
// called with scope of axis object.
$.jqplot.MeterGaugeAxisRenderer.prototype.init = function(options){
//
this.tickRenderer = $.jqplot.MeterGaugeTickRenderer;
$.extend(true, this, options);
// I don't think I'm going to need _dataBounds here.
// have to go Axis scaling in a way to fit chart onto plot area
// and provide u2p and p2u functionality for mouse cursor, etc.
// for convienence set _dataBounds to 0 and 100 and
// set min/max to 0 and 100.
this._dataBounds = {min:0, max:100};
this.min = 0;
this.max = 100;
this.showTicks = false;
this.ticks = [];
this.showMark = false;
this.show = false;
};
$.jqplot.MeterGaugeLegendRenderer = function(){
$.jqplot.TableLegendRenderer.call(this);
};
$.jqplot.MeterGaugeLegendRenderer.prototype = new $.jqplot.TableLegendRenderer();
$.jqplot.MeterGaugeLegendRenderer.prototype.constructor = $.jqplot.MeterGaugeLegendRenderer;
/**
* Class: $.jqplot.MeterGaugeLegendRenderer
*Meter gauges don't typically have a legend, this overrides the default legend renderer.
*/
$.jqplot.MeterGaugeLegendRenderer.prototype.init = function(options) {
// Maximum number of rows in the legend. 0 or null for unlimited.
this.numberRows = null;
// Maximum number of columns in the legend. 0 or null for unlimited.
this.numberColumns = null;
$.extend(true, this, options);
};
// called with context of legend
$.jqplot.MeterGaugeLegendRenderer.prototype.draw = function() {
if (this.show) {
var series = this._series;
var ss = 'position:absolute;';
ss += (this.background) ? 'background:'+this.background+';' : '';
ss += (this.border) ? 'border:'+this.border+';' : '';
ss += (this.fontSize) ? 'font-size:'+this.fontSize+';' : '';
ss += (this.fontFamily) ? 'font-family:'+this.fontFamily+';' : '';
ss += (this.textColor) ? 'color:'+this.textColor+';' : '';
ss += (this.marginTop != null) ? 'margin-top:'+this.marginTop+';' : '';
ss += (this.marginBottom != null) ? 'margin-bottom:'+this.marginBottom+';' : '';
ss += (this.marginLeft != null) ? 'margin-left:'+this.marginLeft+';' : '';
ss += (this.marginRight != null) ? 'margin-right:'+this.marginRight+';' : '';
this._elem = $('<table class="jqplot-table-legend" style="'+ss+'"></table>');
// MeterGauge charts legends don't go by number of series, but by number of data points
// in the series. Refactor things here for that.
var pad = false,
reverse = false,
nr, nc;
var s = series[0];
if (s.show) {
var pd = s.data;
if (this.numberRows) {
nr = this.numberRows;
if (!this.numberColumns){
nc = Math.ceil(pd.length/nr);
}
else{
nc = this.numberColumns;
}
}
else if (this.numberColumns) {
nc = this.numberColumns;
nr = Math.ceil(pd.length/this.numberColumns);
}
else {
nr = pd.length;
nc = 1;
}
var i, j, tr, td1, td2, lt, rs, color;
var idx = 0;
for (i=0; i<nr; i++) {
if (reverse){
tr = $('<tr class="jqplot-table-legend"></tr>').prependTo(this._elem);
}
else{
tr = $('<tr class="jqplot-table-legend"></tr>').appendTo(this._elem);
}
for (j=0; j<nc; j++) {
if (idx < pd.length){
// debugger
lt = this.labels[idx] || pd[idx][0].toString();
color = s.color;
if (!reverse){
if (i>0){
pad = true;
}
else{
pad = false;
}
}
else{
if (i == nr -1){
pad = false;
}
else{
pad = true;
}
}
rs = (pad) ? this.rowSpacing : '0';
td1 = $('<td class="jqplot-table-legend" style="text-align:center;padding-top:'+rs+';">'+
'<div><div class="jqplot-table-legend-swatch" style="border-color:'+color+';"></div>'+
'</div></td>');
td2 = $('<td class="jqplot-table-legend" style="padding-top:'+rs+';"></td>');
if (this.escapeHtml){
td2.text(lt);
}
else {
td2.html(lt);
}
if (reverse) {
td2.prependTo(tr);
td1.prependTo(tr);
}
else {
td1.appendTo(tr);
td2.appendTo(tr);
}
pad = true;
}
idx++;
}
}
}
}
return this._elem;
};
// setup default renderers for axes and legend so user doesn't have to
// called with scope of plot
function preInit(target, data, options) {
// debugger
options = options || {};
options.axesDefaults = options.axesDefaults || {};
options.legend = options.legend || {};
options.seriesDefaults = options.seriesDefaults || {};
options.grid = options.grid || {};
// only set these if there is a gauge series
var setopts = false;
if (options.seriesDefaults.renderer == $.jqplot.MeterGaugeRenderer) {
setopts = true;
}
else if (options.series) {
for (var i=0; i < options.series.length; i++) {
if (options.series[i].renderer == $.jqplot.MeterGaugeRenderer) {
setopts = true;
}
}
}
if (setopts) {
options.axesDefaults.renderer = $.jqplot.MeterGaugeAxisRenderer;
options.legend.renderer = $.jqplot.MeterGaugeLegendRenderer;
options.legend.preDraw = true;
options.grid.background = options.grid.background || 'white';
options.grid.drawGridlines = false;
options.grid.borderWidth = (options.grid.borderWidth != null) ? options.grid.borderWidth : 0;
options.grid.shadow = (options.grid.shadow != null) ? options.grid.shadow : false;
}
}
// called with scope of plot
function postParseOptions(options) {
//
}
$.jqplot.preInitHooks.push(preInit);
$.jqplot.postParseOptionsHooks.push(postParseOptions);
$.jqplot.MeterGaugeTickRenderer = function() {
$.jqplot.AxisTickRenderer.call(this);
};
$.jqplot.MeterGaugeTickRenderer.prototype = new $.jqplot.AxisTickRenderer();
$.jqplot.MeterGaugeTickRenderer.prototype.constructor = $.jqplot.MeterGaugeTickRenderer;
})(jQuery);