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- /**
- * jqPlot
- * Pure JavaScript plotting plugin using jQuery
- *
- * Version: 1.0.0b2_r792
- *
- * 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: $.jqplot.LogAxisRenderer
- * A plugin for a jqPlot to render a logarithmic axis.
- *
- * To use this renderer, include the plugin in your source
- * > <script type="text/javascript" language="javascript" src="plugins/jqplot.logAxisRenderer.js"></script>
- *
- * and supply the appropriate options to your plot
- *
- * > {axes:{xaxis:{renderer:$.jqplot.LogAxisRenderer}}}
- **/
- $.jqplot.LogAxisRenderer = function() {
- $.jqplot.LinearAxisRenderer.call(this);
- // prop: axisDefaults
- // Default properties which will be applied directly to the series.
- //
- // Group: Properties
- //
- // Properties
- //
- /// base - the logarithmic base, commonly 2, 10 or Math.E
- // tickDistribution - 'even' or 'power'. 'even' gives equal pixel
- // spacing of the ticks on the plot. 'power' gives ticks in powers
- // of 10.
- this.axisDefaults = {
- base : 10,
- tickDistribution :'even'
- };
- };
-
- $.jqplot.LogAxisRenderer.prototype = new $.jqplot.LinearAxisRenderer();
- $.jqplot.LogAxisRenderer.prototype.constructor = $.jqplot.LogAxisRenderer;
-
- $.jqplot.LogAxisRenderer.prototype.init = function(options) {
- // prop: tickRenderer
- // A class of a rendering engine for creating the ticks labels displayed on the plot,
- // See <$.jqplot.AxisTickRenderer>.
- // this.tickRenderer = $.jqplot.AxisTickRenderer;
- // this.labelRenderer = $.jqplot.AxisLabelRenderer;
- $.extend(true, this.renderer, options);
- for (var d in this.renderer.axisDefaults) {
- if (this[d] == null) {
- this[d] = this.renderer.axisDefaults[d];
- }
- }
- var db = this._dataBounds;
- // Go through all the series attached to this axis and find
- // the min/max bounds for this axis.
- for (var i=0; i<this._series.length; i++) {
- var s = this._series[i];
- var d = s.data;
-
- for (var j=0; j<d.length; j++) {
- if (this.name == 'xaxis' || this.name == 'x2axis') {
- if ((d[j][0] != null && d[j][0] < db.min) || db.min == null) {
- db.min = d[j][0];
- }
- if ((d[j][0] != null && d[j][0] > db.max) || db.max == null) {
- db.max = d[j][0];
- }
- }
- else {
- if ((d[j][1] != null && d[j][1] < db.min) || db.min == null) {
- db.min = d[j][1];
- }
- if ((d[j][1] != null && d[j][1] > db.max) || db.max == null) {
- db.max = d[j][1];
- }
- }
- }
- }
- };
-
- $.jqplot.LogAxisRenderer.prototype.createTicks = function() {
- // we're are operating on an axis here
- var ticks = this._ticks;
- var userTicks = this.ticks;
- var name = this.name;
- var db = this._dataBounds;
- var dim, interval;
- var min, max;
- var pos1, pos2;
- var tt, i;
-
- // if we already have ticks, use them.
- // ticks must be in order of increasing value.
- if (userTicks.length) {
- // ticks could be 1D or 2D array of [val, val, ,,,] or [[val, label], [val, label], ...] or mixed
- for (i=0; i<userTicks.length; i++){
- var ut = userTicks[i];
- var t = new this.tickRenderer(this.tickOptions);
- if (ut.constructor == Array) {
- t.value = ut[0];
- t.label = ut[1];
- if (!this.showTicks) {
- t.showLabel = false;
- t.showMark = false;
- }
- else if (!this.showTickMarks) {
- t.showMark = false;
- }
- t.setTick(ut[0], this.name);
- this._ticks.push(t);
- }
-
- else {
- t.value = ut;
- if (!this.showTicks) {
- t.showLabel = false;
- t.showMark = false;
- }
- else if (!this.showTickMarks) {
- t.showMark = false;
- }
- t.setTick(ut, this.name);
- this._ticks.push(t);
- }
- }
- this.numberTicks = userTicks.length;
- this.min = this._ticks[0].value;
- this.max = this._ticks[this.numberTicks-1].value;
- }
-
- // we don't have any ticks yet, let's make some!
- else {
- if (name == 'xaxis' || name == 'x2axis') {
- dim = this._plotDimensions.width;
- }
- else {
- dim = this._plotDimensions.height;
- }
-
- min = ((this.min != null) ? this.min : db.min);
- max = ((this.max != null) ? this.max : db.max);
-
- // if min and max are same, space them out a bit
- if (min == max) {
- var adj = 0.05;
- min = min*(1-adj);
- max = max*(1+adj);
- }
-
- // perform some checks
- if (this.min != null && this.min <= 0) {
- throw('log axis minimum must be greater than 0');
- }
- if (this.max != null && this.max <= 0) {
- throw('log axis maximum must be greater than 0');
- }
- // if (this.pad >1.99) this.pad = 1.99;
- var range = max - min;
- var rmin, rmax;
-
- if (this.tickDistribution == 'even') {
- rmin = (this.min != null) ? this.min : min - min*((this.padMin-1)/2);
- rmax = (this.max != null) ? this.max : max + max*((this.padMax-1)/2);
- this.min = rmin;
- this.max = rmax;
- range = this.max - this.min;
-
- if (this.numberTicks == null){
- if (dim > 100) {
- this.numberTicks = parseInt(3+(dim-100)/75, 10);
- }
- else {
- this.numberTicks = 2;
- }
- }
-
- var u = Math.pow(this.base, (1/(this.numberTicks-1)*Math.log(this.max/this.min)/Math.log(this.base)));
- for (var i=0; i<this.numberTicks; i++){
- tt = this.min * Math.pow(u, i);
- var t = new this.tickRenderer(this.tickOptions);
- if (!this.showTicks) {
- t.showLabel = false;
- t.showMark = false;
- }
- else if (!this.showTickMarks) {
- t.showMark = false;
- }
- t.setTick(tt, this.name);
- this._ticks.push(t);
- }
-
- }
-
- else if (this.tickDistribution == 'power'){
- // for power distribution, open up range to get a nice power of axis.renderer.base.
- // power distribution won't respect the user's min/max settings.
- rmin = Math.pow(this.base, Math.ceil(Math.log(min*(2-this.padMin))/Math.log(this.base))-1);
- rmax = Math.pow(this.base, Math.floor(Math.log(max*this.padMax)/Math.log(this.base))+1);
- this.min = rmin;
- this.max = rmax;
- range = this.max - this.min;
-
- var fittedTicks = 0;
- var minorTicks = 0;
- if (this.numberTicks == null){
- if (dim > 100) {
- this.numberTicks = Math.round(Math.log(this.max/this.min)/Math.log(this.base) + 1);
- if (this.numberTicks < 2) {
- this.numberTicks = 2;
- }
- fittedTicks = parseInt(3+(dim-100)/75, 10);
- }
- else {
- this.numberTicks = 2;
- fittedTicks = 2;
- }
- // if we don't have enough ticks, add some intermediate ticks
- // how many to have between major ticks.
- if (this.numberTicks < fittedTicks-1) {
- minorTicks = Math.floor(fittedTicks/this.numberTicks);
- }
- }
-
- for (var i=0; i<this.numberTicks; i++){
- tt = Math.pow(this.base, i - this.numberTicks + 1) * this.max;
- var t = new this.tickRenderer(this.tickOptions);
- if (!this.showTicks) {
- t.showLabel = false;
- t.showMark = false;
- }
- else if (!this.showTickMarks) {
- t.showMark = false;
- }
- t.setTick(tt, this.name);
- this._ticks.push(t);
-
- if (minorTicks && i<this.numberTicks-1) {
- var tt1 = Math.pow(this.base, i - this.numberTicks + 2) * this.max;
- var spread = tt1 - tt;
- var interval = tt1 / (minorTicks+1);
- for (var j=minorTicks-1; j>=0; j--) {
- var val = tt1-interval*(j+1);
- var t = new this.tickRenderer(this.tickOptions);
- if (!this.showTicks) {
- t.showLabel = false;
- t.showMark = false;
- }
- else if (!this.showTickMarks) {
- t.showMark = false;
- }
- t.setTick(val, this.name);
- this._ticks.push(t);
- }
- }
- }
- }
- }
- };
-
- $.jqplot.LogAxisRenderer.prototype.pack = function(pos, offsets) {
- var lb = parseInt(this.base, 10);
- var ticks = this._ticks;
- var trans = function (v) { return Math.log(v)/Math.log(lb); };
- var invtrans = function (v) { return Math.pow(Math.E, (Math.log(lb)*v)); };
- var max = trans(this.max);
- var min = trans(this.min);
- var offmax = offsets.max;
- var offmin = offsets.min;
- var lshow = (this._label == null) ? false : this._label.show;
-
- for (var p in pos) {
- this._elem.css(p, pos[p]);
- }
-
- this._offsets = offsets;
- // pixellength will be + for x axes and - for y axes becasue pixels always measured from top left.
- var pixellength = offmax - offmin;
- var unitlength = max - min;
-
- // point to unit and unit to point conversions references to Plot DOM element top left corner.
- this.p2u = function(p){
- return invtrans((p - offmin) * unitlength / pixellength + min);
- };
-
- this.u2p = function(u){
- return (trans(u) - min) * pixellength / unitlength + offmin;
- };
-
- if (this.name == 'xaxis' || this.name == 'x2axis'){
- this.series_u2p = function(u){
- return (trans(u) - min) * pixellength / unitlength;
- };
- this.series_p2u = function(p){
- return invtrans(p * unitlength / pixellength + min);
- };
- }
- // yaxis is max at top of canvas.
- else {
- this.series_u2p = function(u){
- return (trans(u) - max) * pixellength / unitlength;
- };
- this.series_p2u = function(p){
- return invtrans(p * unitlength / pixellength + max);
- };
- }
-
- if (this.show) {
- if (this.name == 'xaxis' || this.name == 'x2axis') {
- for (var i=0; i<ticks.length; i++) {
- var t = ticks[i];
- if (t.show && t.showLabel) {
- var shim;
-
- if (t.constructor == $.jqplot.CanvasAxisTickRenderer && t.angle) {
- switch (t.labelPosition) {
- case 'auto':
- // position at end
- if (t.angle < 0) {
- shim = -t.getWidth() + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
- }
- // position at start
- else {
- shim = -t._textRenderer.height * Math.sin(t._textRenderer.angle) / 2;
- }
- break;
- case 'end':
- shim = -t.getWidth() + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
- break;
- case 'start':
- shim = -t._textRenderer.height * Math.sin(t._textRenderer.angle) / 2;
- break;
- case 'middle':
- shim = -t.getWidth()/2 + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
- break;
- default:
- shim = -t.getWidth()/2 + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
- break;
- }
- }
- else {
- shim = -t.getWidth()/2;
- }
- // var shim = t.getWidth()/2;
- var val = this.u2p(t.value) + shim + 'px';
- t._elem.css('left', val);
- t.pack();
- }
- }
- if (lshow) {
- var w = this._label._elem.outerWidth(true);
- this._label._elem.css('left', offmin + pixellength/2 - w/2 + 'px');
- if (this.name == 'xaxis') {
- this._label._elem.css('bottom', '0px');
- }
- else {
- this._label._elem.css('top', '0px');
- }
- this._label.pack();
- }
- }
- else {
- for (var i=0; i<ticks.length; i++) {
- var t = ticks[i];
- if (t.show && t.showLabel) {
- var shim;
- if (t.constructor == $.jqplot.CanvasAxisTickRenderer && t.angle) {
- switch (t.labelPosition) {
- case 'auto':
- // position at end
- case 'end':
- if (t.angle < 0) {
- shim = -t._textRenderer.height * Math.cos(-t._textRenderer.angle) / 2;
- }
- else {
- shim = -t.getHeight() + t._textRenderer.height * Math.cos(t._textRenderer.angle) / 2;
- }
- break;
- case 'start':
- if (t.angle > 0) {
- shim = -t._textRenderer.height * Math.cos(-t._textRenderer.angle) / 2;
- }
- else {
- shim = -t.getHeight() + t._textRenderer.height * Math.cos(t._textRenderer.angle) / 2;
- }
- break;
- case 'middle':
- // if (t.angle > 0) {
- // shim = -t.getHeight()/2 + t._textRenderer.height * Math.sin(-t._textRenderer.angle) / 2;
- // }
- // else {
- // shim = -t.getHeight()/2 - t._textRenderer.height * Math.sin(t._textRenderer.angle) / 2;
- // }
- shim = -t.getHeight()/2;
- break;
- default:
- shim = -t.getHeight()/2;
- break;
- }
- }
- else {
- shim = -t.getHeight()/2;
- }
-
- var val = this.u2p(t.value) + shim + 'px';
- t._elem.css('top', val);
- t.pack();
- }
- }
- if (lshow) {
- var h = this._label._elem.outerHeight(true);
- this._label._elem.css('top', offmax - pixellength/2 - h/2 + 'px');
- if (this.name == 'yaxis') {
- this._label._elem.css('left', '0px');
- }
- else {
- this._label._elem.css('right', '0px');
- }
- this._label.pack();
- }
- }
- }
- };
- })(jQuery);
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