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The JWebSwing implementation for JQPlot Plugin
/**
* jqPlot
* Pure JavaScript plotting plugin using jQuery
*
* Version: 1.0.9
* Revision: d96a669
*
* Copyright (c) 2009-2016 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.PointLabels
* Plugin for putting labels at the data points.
*
* To use this plugin, include the js
* file in your source:
*
* >
*
* By default, the last value in the data ponit array in the data series is used
* for the label. For most series renderers, extra data can be added to the
* data point arrays and the last value will be used as the label.
*
* For instance,
* this series:
*
* > [[1,4], [3,5], [7,2]]
*
* Would, by default, use the y values in the labels.
* Extra data can be added to the series like so:
*
* > [[1,4,'mid'], [3 5,'hi'], [7,2,'low']]
*
* And now the point labels would be 'mid', 'low', and 'hi'.
*
* Options to the point labels and a custom labels array can be passed into the
* "pointLabels" option on the series option like so:
*
* > series:[{pointLabels:{
* > labels:['mid', 'hi', 'low'],
* > location:'se',
* > ypadding: 12
* > }
* > }]
*
* A custom labels array in the options takes precendence over any labels
* in the series data. If you have a custom labels array in the options,
* but still want to use values from the series array as labels, set the
* "labelsFromSeries" option to true.
*
* By default, html entities (<, >, etc.) are escaped in point labels.
* If you want to include actual html markup in the labels,
* set the "escapeHTML" option to false.
*
*/
$.jqplot.PointLabels = function (options) {
// Group: Properties
//
// prop: show
// show the labels or not.
this.show = $.jqplot.config.enablePlugins;
// prop: location
// compass location where to position the label around the point.
// 'n', 'ne', 'e', 'se', 's', 'sw', 'w', 'nw'
this.location = 'n';
// prop: labelsFromSeries
// true to use labels within data point arrays.
this.labelsFromSeries = false;
// prop: seriesLabelIndex
// array index for location of labels within data point arrays.
// if null, will use the last element of the data point array.
this.seriesLabelIndex = null;
// prop: labels
// array of arrays of labels, one array for each series.
this.labels = [];
// actual labels that will get displayed.
// needed to preserve user specified labels in labels array.
this._labels = [];
// prop: stackedValue
// true to display value as stacked in a stacked plot.
// no effect if labels is specified.
this.stackedValue = false;
// prop: ypadding
// vertical padding in pixels between point and label
this.ypadding = 6;
// prop: xpadding
// horizontal padding in pixels between point and label
this.xpadding = 6;
// prop: escapeHTML
// true to escape html entities in the labels.
// If you want to include markup in the labels, set to false.
this.escapeHTML = true;
// prop: edgeTolerance
// Number of pixels that the label must be away from an axis
// boundary in order to be drawn. Negative values will allow overlap
// with the grid boundaries.
this.edgeTolerance = -5;
// prop: formatter
// A class of a formatter for the tick text. sprintf by default.
this.formatter = $.jqplot.DefaultTickFormatter;
// prop: formatString
// string passed to the formatter.
this.formatString = '';
// prop: hideZeros
// true to not show a label for a value which is 0.
this.hideZeros = false;
this._elems = [];
$.extend(true, this, options);
};
var locations = ['nw', 'n', 'ne', 'e', 'se', 's', 'sw', 'w'];
var locationIndicies = {'nw': 0, 'n': 1, 'ne': 2, 'e': 3, 'se': 4, 's': 5, 'sw': 6, 'w': 7};
var oppositeLocations = ['se', 's', 'sw', 'w', 'nw', 'n', 'ne', 'e'];
// called with scope of a series
$.jqplot.PointLabels.init = function (target, data, seriesDefaults, opts, plot) {
var options = $.extend(true, {}, seriesDefaults, opts);
options.pointLabels = options.pointLabels || {};
if (this.renderer.constructor === $.jqplot.BarRenderer && this.barDirection === 'horizontal' && !options.pointLabels.location) {
options.pointLabels.location = 'e';
}
// add a pointLabels attribute to the series plugins
this.plugins.pointLabels = new $.jqplot.PointLabels(options.pointLabels);
this.plugins.pointLabels.setLabels.call(this);
};
// called with scope of series
$.jqplot.PointLabels.prototype.setLabels = function () {
var p = this.plugins.pointLabels;
var labelIdx;
if (p.seriesLabelIndex != null) {
labelIdx = p.seriesLabelIndex;
}
else if (this.renderer.constructor === $.jqplot.BarRenderer && this.barDirection === 'horizontal') {
labelIdx = (this._plotData[0].length < 3) ? 0 : this._plotData[0].length - 1;
}
else {
labelIdx = (this._plotData.length === 0) ? 0 : this._plotData[0].length - 1;
}
p._labels = [];
if (p.labels.length === 0 || p.labelsFromSeries) {
if (p.stackedValue) {
if (this._plotData.length && this._plotData[0].length) {
// var idx = p.seriesLabelIndex || this._plotData[0].length -1;
for (var i = 0; i < this._plotData.length; i++) {
p._labels.push(this._plotData[i][labelIdx]);
}
}
}
else {
// var d = this._plotData;
var d = this.data;
if (this.renderer.constructor === $.jqplot.BarRenderer && this.waterfall) {
d = this._data;
}
if (d.length && d[0].length) {
// var idx = p.seriesLabelIndex || d[0].length -1;
for (var i = 0; i < d.length; i++) {
p._labels.push(d[i][labelIdx]);
}
}
d = null;
}
}
else if (p.labels.length) {
p._labels = p.labels;
}
};
$.jqplot.PointLabels.prototype.xOffset = function (elem, location, padding) {
location = location || this.location;
padding = padding || this.xpadding;
var offset;
switch (location) {
case 'nw':
offset = -elem.outerWidth(true) - this.xpadding;
break;
case 'n':
offset = -elem.outerWidth(true) / 2;
break;
case 'ne':
offset = this.xpadding;
break;
case 'e':
offset = this.xpadding;
break;
case 'se':
offset = this.xpadding;
break;
case 's':
offset = -elem.outerWidth(true) / 2;
break;
case 'sw':
offset = -elem.outerWidth(true) - this.xpadding;
break;
case 'w':
offset = -elem.outerWidth(true) - this.xpadding;
break;
default: // same as 'nw'
offset = -elem.outerWidth(true) - this.xpadding;
break;
}
return offset;
};
$.jqplot.PointLabels.prototype.yOffset = function (elem, location, padding) {
location = location || this.location;
padding = padding || this.xpadding;
var offset;
switch (location) {
case 'nw':
offset = -elem.outerHeight(true) - this.ypadding;
break;
case 'n':
offset = -elem.outerHeight(true) - this.ypadding;
break;
case 'ne':
offset = -elem.outerHeight(true) - this.ypadding;
break;
case 'e':
offset = -elem.outerHeight(true) / 2;
break;
case 'se':
offset = this.ypadding;
break;
case 's':
offset = this.ypadding;
break;
case 'sw':
offset = this.ypadding;
break;
case 'w':
offset = -elem.outerHeight(true) / 2;
break;
default: // same as 'nw'
offset = -elem.outerHeight(true) - this.ypadding;
break;
}
return offset;
};
// called with scope of series
$.jqplot.PointLabels.draw = function (sctx, options, plot) {
var p = this.plugins.pointLabels;
// set labels again in case they have changed.
p.setLabels.call(this);
// remove any previous labels
for (var i = 0; i < p._elems.length; i++) {
// Memory Leaks patch
// p._elems[i].remove();
if (p._elems[i]) {
p._elems[i].emptyForce();
}
}
p._elems.splice(0, p._elems.length);
if (p.show) {
var ax = '_' + this._stackAxis + 'axis';
if (!p.formatString) {
p.formatString = this[ax]._ticks[0].formatString;
p.formatter = this[ax]._ticks[0].formatter;
}
var pd = this._plotData;
var ppd = this._prevPlotData;
var xax = this._xaxis;
var yax = this._yaxis;
var elem, helem;
for (var i = 0, l = p._labels.length; i < l; i++) {
var label = p._labels[i];
if (label == null || (p.hideZeros && parseFloat(label) == 0)) {
continue;
}
label = p.formatter(p.formatString, label);
helem = document.createElement('div');
p._elems[i] = $(helem);
elem = p._elems[i];
elem.addClass('jqplot-point-label jqplot-series-' + this.index + ' jqplot-point-' + i);
elem.css('position', 'absolute');
elem.insertAfter(sctx.canvas);
if (p.escapeHTML) {
elem.text(label);
}
else {
elem.html(label);
}
var location = p.location;
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) {
location = oppositeLocations[locationIndicies[location]];
}
var ell = xax.u2p(pd[i][0]) + p.xOffset(elem, location);
var elt = yax.u2p(pd[i][1]) + p.yOffset(elem, location);
// we have stacked chart but are not showing stacked values,
// place labels in center.
if (this._stack && !p.stackedValue) {
if (this.barDirection === "vertical") {
elt = (this._barPoints[i][0][1] + this._barPoints[i][1][1]) / 2 + plot._gridPadding.top - 0.5 * elem.outerHeight(true);
}
else {
ell = (this._barPoints[i][2][0] + this._barPoints[i][0][0]) / 2 + plot._gridPadding.left - 0.5 * elem.outerWidth(true);
}
}
if (this.renderer.constructor == $.jqplot.BarRenderer) {
if (this.barDirection == "vertical") {
ell += this._barNudge;
}
else {
elt -= this._barNudge;
}
}
elem.css('left', ell);
elem.css('top', elt);
var elr = ell + elem.width();
var elb = elt + elem.height();
var et = p.edgeTolerance;
var scl = $(sctx.canvas).position().left;
var sct = $(sctx.canvas).position().top;
var scr = sctx.canvas.width + scl;
var scb = sctx.canvas.height + sct;
// if label is outside of allowed area, remove it
if (ell - et < scl || elt - et < sct || elr + et > scr || elb + et > scb) {
elem.remove();
}
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);
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