egroupware/phpgwapi/js/jquery/jqplot/plugins/jqplot.logAxisRenderer.js
2011-08-09 23:10:50 +00:00

446 lines
19 KiB
JavaScript

/**
* 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);