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379 lines
14 KiB
JavaScript
379 lines
14 KiB
JavaScript
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/**
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* jqPlot
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* Pure JavaScript plotting plugin using jQuery
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*
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* Version: 1.0.4
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* Revision: 1121
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*
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* Copyright (c) 2009-2012 Chris Leonello
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* jqPlot is currently available for use in all personal or commercial projects
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* under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL
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* version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can
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* choose the license that best suits your project and use it accordingly.
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*
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* Although not required, the author would appreciate an email letting him
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* know of any substantial use of jqPlot. You can reach the author at:
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* chris at jqplot dot com or see http://www.jqplot.com/info.php .
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*
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* If you are feeling kind and generous, consider supporting the project by
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* making a donation at: http://www.jqplot.com/donate.php .
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*
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* sprintf functions contained in jqplot.sprintf.js by Ash Searle:
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*
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* version 2007.04.27
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* author Ash Searle
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* http://hexmen.com/blog/2007/03/printf-sprintf/
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* http://hexmen.com/js/sprintf.js
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* The author (Ash Searle) has placed this code in the public domain:
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* "This code is unrestricted: you are free to use it however you like."
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*
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*/
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(function($) {
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/**
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* Class: $.jqplot.PointLabels
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* Plugin for putting labels at the data points.
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*
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* To use this plugin, include the js
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* file in your source:
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*
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* > <script type="text/javascript" src="plugins/jqplot.pointLabels.js"></script>
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*
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* By default, the last value in the data ponit array in the data series is used
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* for the label. For most series renderers, extra data can be added to the
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* data point arrays and the last value will be used as the label.
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*
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* For instance,
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* this series:
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*
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* > [[1,4], [3,5], [7,2]]
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*
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* Would, by default, use the y values in the labels.
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* Extra data can be added to the series like so:
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*
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* > [[1,4,'mid'], [3 5,'hi'], [7,2,'low']]
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*
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* And now the point labels would be 'mid', 'low', and 'hi'.
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*
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* Options to the point labels and a custom labels array can be passed into the
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* "pointLabels" option on the series option like so:
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*
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* > series:[{pointLabels:{
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* > labels:['mid', 'hi', 'low'],
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* > location:'se',
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* > ypadding: 12
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* > }
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* > }]
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*
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* A custom labels array in the options takes precendence over any labels
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* in the series data. If you have a custom labels array in the options,
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* but still want to use values from the series array as labels, set the
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* "labelsFromSeries" option to true.
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*
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* By default, html entities (<, >, etc.) are escaped in point labels.
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* If you want to include actual html markup in the labels,
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* set the "escapeHTML" option to false.
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*
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*/
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$.jqplot.PointLabels = function(options) {
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// Group: Properties
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//
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// prop: show
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// show the labels or not.
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this.show = $.jqplot.config.enablePlugins;
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// prop: location
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// compass location where to position the label around the point.
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// 'n', 'ne', 'e', 'se', 's', 'sw', 'w', 'nw'
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this.location = 'n';
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// prop: labelsFromSeries
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// true to use labels within data point arrays.
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this.labelsFromSeries = false;
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// prop: seriesLabelIndex
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// array index for location of labels within data point arrays.
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// if null, will use the last element of the data point array.
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this.seriesLabelIndex = null;
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// prop: labels
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// array of arrays of labels, one array for each series.
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this.labels = [];
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// actual labels that will get displayed.
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// needed to preserve user specified labels in labels array.
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this._labels = [];
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// prop: stackedValue
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// true to display value as stacked in a stacked plot.
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// no effect if labels is specified.
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this.stackedValue = false;
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// prop: ypadding
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// vertical padding in pixels between point and label
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this.ypadding = 6;
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// prop: xpadding
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// horizontal padding in pixels between point and label
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this.xpadding = 6;
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// prop: escapeHTML
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// true to escape html entities in the labels.
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// If you want to include markup in the labels, set to false.
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this.escapeHTML = true;
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// prop: edgeTolerance
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// Number of pixels that the label must be away from an axis
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// boundary in order to be drawn. Negative values will allow overlap
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// with the grid boundaries.
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this.edgeTolerance = -5;
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// prop: formatter
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// A class of a formatter for the tick text. sprintf by default.
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this.formatter = $.jqplot.DefaultTickFormatter;
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// prop: formatString
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// string passed to the formatter.
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this.formatString = '';
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// prop: hideZeros
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// true to not show a label for a value which is 0.
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this.hideZeros = false;
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this._elems = [];
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$.extend(true, this, options);
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};
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var locations = ['nw', 'n', 'ne', 'e', 'se', 's', 'sw', 'w'];
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var locationIndicies = {'nw':0, 'n':1, 'ne':2, 'e':3, 'se':4, 's':5, 'sw':6, 'w':7};
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var oppositeLocations = ['se', 's', 'sw', 'w', 'nw', 'n', 'ne', 'e'];
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// called with scope of a series
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$.jqplot.PointLabels.init = function (target, data, seriesDefaults, opts, plot){
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var options = $.extend(true, {}, seriesDefaults, opts);
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options.pointLabels = options.pointLabels || {};
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if (this.renderer.constructor === $.jqplot.BarRenderer && this.barDirection === 'horizontal' && !options.pointLabels.location) {
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options.pointLabels.location = 'e';
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}
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// add a pointLabels attribute to the series plugins
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this.plugins.pointLabels = new $.jqplot.PointLabels(options.pointLabels);
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this.plugins.pointLabels.setLabels.call(this);
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};
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// called with scope of series
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$.jqplot.PointLabels.prototype.setLabels = function() {
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var p = this.plugins.pointLabels;
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var labelIdx;
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if (p.seriesLabelIndex != null) {
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labelIdx = p.seriesLabelIndex;
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}
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else if (this.renderer.constructor === $.jqplot.BarRenderer && this.barDirection === 'horizontal') {
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labelIdx = 0;
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}
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else {
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labelIdx = (this._plotData.length === 0) ? 0 : this._plotData[0].length -1;
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}
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p._labels = [];
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if (p.labels.length === 0 || p.labelsFromSeries) {
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if (p.stackedValue) {
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if (this._plotData.length && this._plotData[0].length){
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// var idx = p.seriesLabelIndex || this._plotData[0].length -1;
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for (var i=0; i<this._plotData.length; i++) {
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p._labels.push(this._plotData[i][labelIdx]);
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}
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}
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}
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else {
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// var d = this._plotData;
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var d = this.data;
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if (this.renderer.constructor === $.jqplot.BarRenderer && this.waterfall) {
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d = this._data;
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}
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if (d.length && d[0].length) {
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// var idx = p.seriesLabelIndex || d[0].length -1;
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for (var i=0; i<d.length; i++) {
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p._labels.push(d[i][labelIdx]);
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}
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}
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d = null;
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}
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}
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else if (p.labels.length){
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p._labels = p.labels;
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}
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};
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$.jqplot.PointLabels.prototype.xOffset = function(elem, location, padding) {
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location = location || this.location;
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padding = padding || this.xpadding;
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var offset;
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switch (location) {
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case 'nw':
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offset = -elem.outerWidth(true) - this.xpadding;
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break;
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case 'n':
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offset = -elem.outerWidth(true)/2;
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break;
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case 'ne':
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offset = this.xpadding;
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break;
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case 'e':
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offset = this.xpadding;
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break;
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case 'se':
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offset = this.xpadding;
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break;
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case 's':
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offset = -elem.outerWidth(true)/2;
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break;
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case 'sw':
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offset = -elem.outerWidth(true) - this.xpadding;
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break;
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case 'w':
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offset = -elem.outerWidth(true) - this.xpadding;
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break;
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default: // same as 'nw'
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offset = -elem.outerWidth(true) - this.xpadding;
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break;
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}
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return offset;
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};
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$.jqplot.PointLabels.prototype.yOffset = function(elem, location, padding) {
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location = location || this.location;
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padding = padding || this.xpadding;
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var offset;
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switch (location) {
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case 'nw':
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offset = -elem.outerHeight(true) - this.ypadding;
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break;
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case 'n':
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offset = -elem.outerHeight(true) - this.ypadding;
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break;
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case 'ne':
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offset = -elem.outerHeight(true) - this.ypadding;
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break;
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case 'e':
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offset = -elem.outerHeight(true)/2;
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break;
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case 'se':
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offset = this.ypadding;
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break;
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case 's':
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offset = this.ypadding;
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break;
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case 'sw':
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offset = this.ypadding;
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break;
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case 'w':
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offset = -elem.outerHeight(true)/2;
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break;
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default: // same as 'nw'
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offset = -elem.outerHeight(true) - this.ypadding;
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break;
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}
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return offset;
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};
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// called with scope of series
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$.jqplot.PointLabels.draw = function (sctx, options, plot) {
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var p = this.plugins.pointLabels;
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// set labels again in case they have changed.
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p.setLabels.call(this);
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// remove any previous labels
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for (var i=0; i<p._elems.length; i++) {
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// Memory Leaks patch
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// p._elems[i].remove();
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p._elems[i].emptyForce();
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}
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p._elems.splice(0, p._elems.length);
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if (p.show) {
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var ax = '_'+this._stackAxis+'axis';
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if (!p.formatString) {
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p.formatString = this[ax]._ticks[0].formatString;
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p.formatter = this[ax]._ticks[0].formatter;
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}
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var pd = this._plotData;
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var ppd = this._prevPlotData;
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var xax = this._xaxis;
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var yax = this._yaxis;
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var elem, helem;
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for (var i=0, l=p._labels.length; i < l; i++) {
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var label = p._labels[i];
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if (p.hideZeros && parseInt(p._labels[i], 10) == 0) {
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label = '';
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}
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if (label != null) {
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label = p.formatter(p.formatString, label);
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}
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helem = document.createElement('div');
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p._elems[i] = $(helem);
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elem = p._elems[i];
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elem.addClass('jqplot-point-label jqplot-series-'+this.index+' jqplot-point-'+i);
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elem.css('position', 'absolute');
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elem.insertAfter(sctx.canvas);
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if (p.escapeHTML) {
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elem.text(label);
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}
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else {
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elem.html(label);
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}
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var location = p.location;
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if ((this.fillToZero && pd[i][1] < 0) || (this.fillToZero && this._type === 'bar' && this.barDirection === 'horizontal' && pd[i][0] < 0) || (this.waterfall && parseInt(label, 10)) < 0) {
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location = oppositeLocations[locationIndicies[location]];
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}
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var ell = xax.u2p(pd[i][0]) + p.xOffset(elem, location);
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var elt = yax.u2p(pd[i][1]) + p.yOffset(elem, location);
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// we have stacked chart but are not showing stacked values,
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// place labels in center.
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if (this._stack && !p.stackedValue) {
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if (this.barDirection === "vertical") {
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elt = (this._barPoints[i][0][1] + this._barPoints[i][1][1]) / 2 + plot._gridPadding.top - 0.5 * elem.outerHeight(true);
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}
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else {
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ell = (this._barPoints[i][2][0] + this._barPoints[i][0][0]) / 2 + plot._gridPadding.left - 0.5 * elem.outerWidth(true);
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}
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}
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if (this.renderer.constructor == $.jqplot.BarRenderer) {
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if (this.barDirection == "vertical") {
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ell += this._barNudge;
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}
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else {
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elt -= this._barNudge;
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}
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}
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elem.css('left', ell);
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elem.css('top', elt);
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var elr = ell + elem.width();
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var elb = elt + elem.height();
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var et = p.edgeTolerance;
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var scl = $(sctx.canvas).position().left;
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var sct = $(sctx.canvas).position().top;
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var scr = sctx.canvas.width + scl;
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var scb = sctx.canvas.height + sct;
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// if label is outside of allowed area, remove it
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if (ell - et < scl || elt - et < sct || elr + et > scr || elb + et > scb) {
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elem.remove();
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}
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|
elem = null;
|
||
|
|
helem = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
// finally, animate them if the series is animated
|
||
|
|
// if (this.renderer.animation && this.renderer.animation._supported && this.renderer.animation.show && plot._drawCount < 2) {
|
||
|
|
// var sel = '.jqplot-point-label.jqplot-series-'+this.index;
|
||
|
|
// $(sel).hide();
|
||
|
|
// $(sel).fadeIn(1000);
|
||
|
|
// }
|
||
|
|
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
$.jqplot.postSeriesInitHooks.push($.jqplot.PointLabels.init);
|
||
|
|
$.jqplot.postDrawSeriesHooks.push($.jqplot.PointLabels.draw);
|
||
|
|
})(jQuery);
|