File Source for Plot.class.php

<?php
/*
* This work is hereby released into the Public Domain.
* To view a copy of the public domain dedication,
* visit http://creativecommons.org/licenses/publicdomain/ or send a letter to
* Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
*
*/
require_once dirname(__FILE__)."/Component.class.php";
/* <php4> */
define("PLOT_LEFT", 'left');
define("PLOT_RIGHT", 'right');
define("PLOT_TOP", 'top');
define("PLOT_BOTTOM", 'bottom');
define("PLOT_BOTH", 'both');
/* </php4> */
/**
* Graph using X and Y axis
*
* @package linea21.externals
* @subpackage artichow
*/
class awPlot extends awComponent {
/**
* Values for Y axis
*
* @var array
*/
var $datay;
/**
* Values for X axis
*
* @var array
*/
var $datax;
/**
* Grid properties
*
* @var Grid
*/
var $grid;
/**
* X axis
*
* @var Axis
*/
var $xAxis;
/**
* Y axis
*
* @var Axis
*/
var $yAxis;
/**
* Position of X axis
*
* @var int
*/
var $xAxisPosition = PLOT_BOTTOM;
/**
* Set X axis on zero ?
*
* @var bool
*/
var $xAxisZero = TRUE;
/**
* Set Y axis on zero ?
*
* @var bool
*/
var $yAxisZero = FALSE;
/**
* Position of Y axis
*
* @var int
*/
var $yAxisPosition = PLOT_LEFT;
/**
* Change min value for Y axis
*
* @var mixed
*/
var $yMin = NULL;
/**
* Change max value for Y axis
*
* @var mixed
*/
var $yMax = NULL;
/**
* Change min value for X axis
*
* @var mixed
*/
var $xMin = NULL;
/**
* Change max value for X axis
*
* @var mixed
*/
var $xMax = NULL;
/**
* Left axis
*
* @var int
*/
/**
* Right axis
*
* @var int
*/
/**
* Top axis
*
* @var int
*/
/**
* Bottom axis
*
* @var int
*/
/**
* Both left/right or top/bottom axis
*
* @var int
*/
/**
* Build the plot
*
*/
function awPlot() {
parent::awComponent();
$this->grid = new awGrid;
$this->grid->setBackgroundColor(new awWhite);
$this->padding->add(20, 0, 0, 20);
$this->xAxis = new awAxis;
$this->xAxis->addTick('major', new awTick(0, 5));
$this->xAxis->addTick('minor', new awTick(0, 3));
$this->xAxis->setTickStyle(TICK_OUT);
$this->xAxis->label->setFont(new awTuffy(7));
$this->yAxis = new awAxis;
$this->yAxis->auto(TRUE);
$this->yAxis->addTick('major', new awTick(0, 5));
$this->yAxis->addTick('minor', new awTick(0, 3));
$this->yAxis->setTickStyle(TICK_OUT);
$this->yAxis->setNumberByTick('minor', 'major', 3);
$this->yAxis->label->setFont(new awTuffy(7));
$this->yAxis->title->setAngle(90);
}
/**
* Get plot values
*
* @return array
*/
function getValues() {
return $this->datay;
}
/**
* Reduce number of values in the plot
*
* @param int $number Reduce number of values to $number
*/
function reduce($number) {
$count = count($this->datay);
$ratio = ceil($count / $number);
if($ratio > 1) {
$tmpy = $this->datay;
$datay = array();
$datax = array();
$cbLabel = $this->xAxis->label->getCallbackFunction();
for($i = 0; $i < $count; $i += $ratio) {
$slice = array_slice($tmpy, $i, $ratio);
$datay[] = array_sum($slice) / count($slice);
// Reduce data on X axis if needed
if($cbLabel !== NULL) {
$datax[] = $cbLabel($i + round($ratio / 2));
}
}
$this->setValues($datay);
if($cbLabel !== NULL) {
$this->xAxis->setLabelText($datax);
}
}
}
/**
* Count values in the plot
*
* @return int
*/
function getXAxisNumber() {
list($min, $max) = $this->xAxis->getRange();
return ($max - $min + 1);
}
/**
* Change X axis
*
* @param int $axis
*/
function setXAxis($axis) {
$this->xAxisPosition = $axis;
}
/**
* Get X axis
*
* @return int
*/
function getXAxis() {
return $this->xAxisPosition;
}
/**
* Set X axis on zero
*
* @param bool $zero
*/
function setXAxisZero($zero) {
$this->xAxisZero = (bool)$zero;
}
/**
* Set Y axis on zero
*
* @param bool $zero
*/
function setYAxisZero($zero) {
$this->yAxisZero = (bool)$zero;
}
/**
* Change Y axis
*
* @param int $axis
*/
function setYAxis($axis) {
$this->yAxisPosition = $axis;
}
/**
* Get Y axis
*
* @return int
*/
function getYAxis() {
return $this->yAxisPosition;
}
/**
* Change min value for Y axis
* Set NULL for auto selection.
*
* @param float $value
*/
function setYMin($value) {
$this->yMin = $value;
$this->yAxis->auto(FALSE);
$this->updateAxis();
}
/**
* Change max value for Y axis
* Set NULL for auto selection.
*
* @param float $value
*/
function setYMax($value) {
$this->yMax = $value;
$this->yAxis->auto(FALSE);
$this->updateAxis();
}
/**
* Change min value for X axis
* Set NULL for auto selection.
*
* @param float $value
*/
function setXMin($value) {
$this->xMin = $value;
$this->updateAxis();
}
/**
* Change max value for X axis
* Set NULL for auto selection.
*
* @param float $value
*/
function setXMax($value) {
$this->xMax = $value;
$this->updateAxis();
}
/**
* Get min value for Y axis
*
* @return float $value
*/
function getYMin() {
if($this->auto) {
if(is_null($this->yMin)) {
$min = array_min($this->datay);
if($min > 0) {
return 0;
}
}
}
return is_null($this->yMin) ? array_min($this->datay) : (float)$this->yMin;
}
/**
* Get max value for Y axis
*
* @return float $value
*/
function getYMax() {
if($this->auto) {
if(is_null($this->yMax)) {
$max = array_max($this->datay);
if($max < 0) {
return 0;
}
}
}
return is_null($this->yMax) ? array_max($this->datay) : (float)$this->yMax;
}
/**
* Get min value for X axis
*
* @return float $value
*/
function getXMin() {
return floor(is_null($this->xMin) ? array_min($this->datax) : $this->xMin);
}
/**
* Get max value for X axis
*
* @return float $value
*/
function getXMax() {
return (ceil(is_null($this->xMax) ? array_max($this->datax) : (float)$this->xMax)) + ($this->getXCenter() ? 1 : 0);
}
/**
* Get min value with spaces for Y axis
*
* @return float $value
*/
function getRealYMin() {
$min = $this->getYMin();
if($this->space->bottom !== NULL) {
$interval = ($this->getYMax() - $min) * $this->space->bottom / 100;
return $min - $interval;
} else {
return is_null($this->yMin) ? $min : (float)$this->yMin;
}
}
/**
* Get max value with spaces for Y axis
*
* @return float $value
*/
function getRealYMax() {
$max = $this->getYMax();
if($this->space->top !== NULL) {
$interval = ($max - $this->getYMin()) * $this->space->top / 100;
return $max + $interval;
} else {
return is_null($this->yMax) ? $max : (float)$this->yMax;
}
}
function init($driver) {
list($x1, $y1, $x2, $y2) = $this->getPosition();
// Get space informations
list($leftSpace, $rightSpace, $topSpace, $bottomSpace) = $this->getSpace($x2 - $x1, $y2 - $y1);
$this->xAxis->setPadding($leftSpace, $rightSpace);
if($this->space->bottom > 0 or $this->space->top > 0) {
list($min, $max) = $this->yAxis->getRange();
$interval = $max - $min;
$this->yAxis->setRange(
$min - $interval * $this->space->bottom / 100,
$max + $interval * $this->space->top / 100
);
}
// Auto-scaling mode
$this->yAxis->autoScale();
// Number of labels is not specified
if($this->yAxis->getLabelNumber() === NULL) {
$number = round(($y2 - $y1) / 75) + 2;
$this->yAxis->setLabelNumber($number);
}
$this->xAxis->line->setX($x1, $x2);
$this->yAxis->line->setY($y2, $y1);
// Set ticks
$this->xAxis->ticks['major']->setNumber($this->getXAxisNumber());
$this->yAxis->ticks['major']->setNumber($this->yAxis->getLabelNumber());
// Center X axis on zero
if($this->xAxisZero) {
$this->xAxis->setYCenter($this->yAxis, 0);
}
// Center Y axis on zero
if($this->yAxisZero) {
$this->yAxis->setXCenter($this->xAxis, 0);
}
// Set axis labels
$labels = array();
list($xMin, $xMax) = $this->xAxis->getRange();
for($i = $xMin; $i <= $xMax; $i++) {
$labels[] = $i;
}
$this->xAxis->label->set($labels);
parent::init($driver);
list($x1, $y1, $x2, $y2) = $this->getPosition();
list($leftSpace, $rightSpace) = $this->getSpace($x2 - $x1, $y2 - $y1);
// Create the grid
$this->createGrid();
// Draw the grid
$this->grid->setSpace($leftSpace, $rightSpace, 0, 0);
$this->grid->draw($driver, $x1, $y1, $x2, $y2);
}
function drawEnvelope($driver) {
list($x1, $y1, $x2, $y2) = $this->getPosition();
if($this->getXCenter()) {
$size = $this->xAxis->getDistance(0, 1);
$this->xAxis->label->move($size / 2, 0);
$this->xAxis->label->hideLast(TRUE);
}
// Draw top axis
if($this->xAxisPosition === PLOT_TOP or $this->xAxisPosition === PLOT_BOTH) {
$top = $this->xAxis;
if($this->xAxisZero === FALSE) {
$top->line->setY($y1, $y1);
}
$top->label->setAlign(NULL, LABEL_TOP);
$top->label->move(0, -3);
$top->title->move(0, -25);
$top->draw($driver);
}
// Draw bottom axis
if($this->xAxisPosition === PLOT_BOTTOM or $this->xAxisPosition === PLOT_BOTH) {
$bottom = $this->xAxis;
if($this->xAxisZero === FALSE) {
$bottom->line->setY($y2, $y2);
}
$bottom->label->setAlign(NULL, LABEL_BOTTOM);
$bottom->label->move(0, 3);
$bottom->reverseTickStyle();
$bottom->title->move(0, 25);
$bottom->draw($driver);
}
// Draw left axis
if($this->yAxisPosition === PLOT_LEFT or $this->yAxisPosition === PLOT_BOTH) {
$left = $this->yAxis;
if($this->yAxisZero === FALSE) {
$left->line->setX($x1, $x1);
}
$left->label->setAlign(LABEL_RIGHT);
$left->label->move(-6, 0);
$left->title->move(-25, 0);
$left->draw($driver);
}
// Draw right axis
if($this->yAxisPosition === PLOT_RIGHT or $this->yAxisPosition === PLOT_BOTH) {
$right = $this->yAxis;
if($this->yAxisZero === FALSE) {
$right->line->setX($x2, $x2);
}
$right->label->setAlign(LABEL_LEFT);
$right->label->move(6, 0);
$right->reverseTickStyle();
$right->title->move(25, 0);
$right->draw($driver);
}
}
function createGrid() {
$max = $this->getRealYMax();
$min = $this->getRealYMin();
$number = $this->yAxis->getLabelNumber() - 1;
if($number < 1) {
return;
}
// Horizontal lines of the grid
$h = array();
for($i = 0; $i <= $number; $i++) {
$h[] = $i / $number;
}
// Vertical lines
$major = $this->yAxis->tick('major');
$interval = $major->getInterval();
$number = $this->getXAxisNumber() - 1;
$w = array();
if($number > 0) {
for($i = 0; $i <= $number; $i++) {
if($i%$interval === 0) {
$w[] = $i / $number;
}
}
}
$this->grid->setGrid($w, $h);
}
/**
* Change values of Y axis
* This method ignores not numeric values
*
* @param array $datay
* @param array $datax
*/
function setValues($datay, $datax = NULL) {
$this->checkArray($datay);
foreach($datay as $key => $value) {
unset($datay[$key]);
$datay[(int)$key] = $value;
}
if($datax === NULL) {
$datax = array();
for($i = 0; $i < count($datay); $i++) {
$datax[] = $i;
}
} else {
foreach($datax as $key => $value) {
unset($datax[$key]);
$datax[(int)$key] = $value;
}
}
$this->checkArray($datax);
if(count($datay) === count($datax)) {
// Set values
$this->datay = $datay;
$this->datax = $datax;
// Update axis with the new awvalues
$this->updateAxis();
} else {
awImage::drawError("Class Plot: Plots must have the same number of X and Y points.");
}
}
/**
* Return begin and end values
*
* @return array
*/
function getLimit() {
$i = 0;
while(array_key_exists($i, $this->datay) and $this->datay[$i] === NULL) {
$i++;
}
$start = $i;
$i = count($this->datay) - 1;
while(array_key_exists($i, $this->datay) and $this->datay[$i] === NULL) {
$i--;
}
$stop = $i;
return array($start, $stop);
}
/**
* Return TRUE if labels must be centered on X axis, FALSE otherwise
*
* @return bool
*/
function updateAxis() {
$this->xAxis->setRange(
$this->getXMin(),
$this->getXMax()
);
$this->yAxis->setRange(
$this->getRealYMin(),
$this->getRealYMax()
);
}
function checkArray(&$array) {
if(is_array($array) === FALSE) {
awImage::drawError("Class Plot: You tried to set a value that is not an array.");
}
foreach($array as $key => $value) {
if(is_numeric($value) === FALSE and is_null($value) === FALSE) {
awImage::drawError("Class Plot: Expected numeric values for the plot.");
}
}
if(count($array) < 1) {
awImage::drawError("Class Plot: Your plot must have at least 1 value.");
}
}
}
registerClass('Plot', TRUE);
class awPlotAxis {
/**
* Left axis
*
* @var Axis
*/
var $left;
/**
* Right axis
*
* @var Axis
*/
var $right;
/**
* Top axis
*
* @var Axis
*/
var $top;
/**
* Bottom axis
*
* @var Axis
*/
var $bottom;
/**
* Build the group of axis
*/
function awPlotAxis() {
$this->left = new awAxis;
$this->left->auto(TRUE);
$this->left->label->setAlign(LABEL_RIGHT);
$this->left->label->move(-6, 0);
$this->yAxis($this->left);
$this->left->setTickStyle(TICK_OUT);
$this->left->title->move(-25, 0);
$this->right = new awAxis;
$this->right->auto(TRUE);
$this->right->label->setAlign(LABEL_LEFT);
$this->right->label->move(6, 0);
$this->yAxis($this->right);
$this->right->setTickStyle(TICK_IN);
$this->right->title->move(25, 0);
$this->top = new awAxis;
$this->top->label->setAlign(NULL, LABEL_TOP);
$this->top->label->move(0, -3);
$this->xAxis($this->top);
$this->top->setTickStyle(TICK_OUT);
$this->top->title->move(0, -25);
$this->bottom = new awAxis;
$this->bottom->label->setAlign(NULL, LABEL_BOTTOM);
$this->bottom->label->move(0, 3);
$this->xAxis($this->bottom);
$this->bottom->setTickStyle(TICK_IN);
$this->bottom->title->move(0, 25);
}
function xAxis(&$axis) {
$axis->addTick('major', new awTick(0, 5));
$axis->addTick('minor', new awTick(0, 3));
$axis->label->setFont(new awTuffy(7));
}
function yAxis(&$axis) {
$axis->addTick('major', new awTick(0, 5));
$axis->addTick('minor', new awTick(0, 3));
$axis->setNumberByTick('minor', 'major', 3);
$axis->label->setFont(new awTuffy(7));
$axis->title->setAngle(90);
}
}
registerClass('PlotAxis');
/**
* A graph with axis can contain some groups of components
*
* @package linea21.externals
* @subpackage artichow
*/
class awPlotGroup extends awComponentGroup {
/**
* Grid properties
*
* @var Grid
*/
var $grid;
/**
* Left, right, top and bottom axis
*
* @var PlotAxis
*/
var $axis;
/**
* Set the X axis on zero
*
* @var bool
*/
var $xAxisZero = TRUE;
/**
* Set the Y axis on zero
*
* @var bool
*/
var $yAxisZero = FALSE;
/**
* Real axis used for Y axis
*
* @var string
*/
var $yRealAxis = PLOT_LEFT;
/**
* Real axis used for X axis
*
* @var string
*/
var $xRealAxis = PLOT_BOTTOM;
/**
* Change min value for Y axis
*
* @var mixed
*/
var $yMin = NULL;
/**
* Change max value for Y axis
*
* @var mixed
*/
var $yMax = NULL;
/**
* Change min value for X axis
*
* @var mixed
*/
var $xMin = NULL;
/**
* Change max value for X axis
*
* @var mixed
*/
var $xMax = NULL;
/**
* Build the PlotGroup
*
*/
function awPlotGroup() {
parent::awComponentGroup();
$this->grid = new awGrid;
$this->grid->setBackgroundColor(new awWhite);
$this->axis = new awPlotAxis;
}
/**
* Set the X axis on zero or not
*
* @param bool $zero
*/
function setXAxisZero($zero) {
$this->xAxisZero = (bool)$zero;
}
/**
* Set the Y axis on zero or not
*
* @param bool $zero
*/
function setYAxisZero($zero) {
$this->yAxisZero = (bool)$zero;
}
/**
* Change min value for Y axis
* Set NULL for auto selection.
*
* @param float $value
*/
function setYMin($value) {
$this->axis->left->auto(FALSE);
$this->axis->right->auto(FALSE);
$this->yMin = $value;
}
/**
* Change max value for Y axis
* Set NULL for auto selection.
*
* @param float $value
*/
function setYMax($value) {
$this->axis->left->auto(FALSE);
$this->axis->right->auto(FALSE);
$this->yMax = $value;
}
/**
* Change min value for X axis
* Set NULL for auto selection.
*
* @param float $value
*/
function setXMin($value) {
$this->xMin = $value;
}
/**
* Change max value for X axis
* Set NULL for auto selection.
*
* @param float $value
*/
function setXMax($value) {
$this->xMax = $value;
}
/**
* Get min value for X axis
*
* @return float $value
*/
function getXMin() {
return $this->getX('min');
}
/**
* Get max value for X axis
*
* @return float $value
*/
function getXMax() {
return $this->getX('max');
}
function getX($type) {
switch($type) {
case 'max' :
if($this->xMax !== NULL) {
return $this->xMax;
}
break;
case 'min' :
if($this->xMin !== NULL) {
return $this->xMin;
}
break;
}
$value = NULL;
$get = 'getX'.ucfirst($type);
for($i = 0; $i < count($this->components); $i++) {
$component = $this->components[$i];
if($value === NULL) {
$value = $component->$get();
} else {
$value = $type($value, $component->$get());
}
}
return $value;
}
/**
* Get min value with spaces for Y axis
*
* @param string $axis Axis name
* @return float $value
*/
function getRealYMin($axis = NULL) {
if($axis === NULL) {
return NULL;
}
$min = $this->getRealY('min', $axis);
$max = $this->getRealY('max', $axis);
if($this->space->bottom !== NULL) {
$interval = ($min - $max) * $this->space->bottom / 100;
return $min + $interval;
} else {
return $min;
}
}
/**
* Get max value with spaces for Y axis
*
* @param string $axis Axis name
* @return float $value
*/
function getRealYMax($axis = NULL) {
if($axis === NULL) {
return NULL;
}
$min = $this->getRealY('min', $axis);
$max = $this->getRealY('max', $axis);
if($this->space->top !== NULL) {
$interval = ($max - $min) * $this->space->top / 100;
return $max + $interval;
} else {
return $max;
}
}
function getRealY($type, $axis) {
switch($type) {
case 'max' :
if($this->yMax !== NULL) {
return $this->yMax;
}
break;
case 'min' :
if($this->yMin !== NULL) {
return $this->yMin;
}
break;
}
$value = NULL;
$get = 'getY'.ucfirst($type);
for($i = 0; $i < count($this->components); $i++) {
$component = $this->components[$i];
switch($axis) {
case PLOT_LEFT :
case PLOT_RIGHT :
$test = ($component->getYAxis() === $axis);
break;
default :
$test = FALSE;
}
if($test) {
$auto = $component->yAxis->isAuto();
$this->axis->{$axis}->auto($auto);
if($value === NULL) {
$value = $component->$get();
} else {
$value = $type($value, $component->$get());
}
}
}
return $value;
}
function init($driver) {
list($x1, $y1, $x2, $y2) = $this->getPosition();
// Get PlotGroup space
list($leftSpace, $rightSpace, $topSpace, $bottomSpace) = $this->getSpace($x2 - $x1, $y2 - $y1);
// Count values in the group
$values = $this->getXAxisNumber();
// Init the PlotGroup
$this->axis->top->line->setX($x1, $x2);
$this->axis->bottom->line->setX($x1, $x2);
$this->axis->left->line->setY($y2, $y1);
$this->axis->right->line->setY($y2, $y1);
$this->axis->top->setPadding($leftSpace, $rightSpace);
$this->axis->bottom->setPadding($leftSpace, $rightSpace);
$xMin = $this->getXMin();
$xMax = $this->getXMax();
$this->axis->top->setRange($xMin, $xMax);
$this->axis->bottom->setRange($xMin, $xMax);
for($i = 0; $i < count($this->components); $i++) {
$component = &$this->components[$i];
$component->auto($this->auto);
// Copy space to the component
$component->setSpace($this->space->left, $this->space->right, $this->space->top, $this->space->bottom);
$component->xAxis->setPadding($leftSpace, $rightSpace);
$component->xAxis->line->setX($x1, $x2);
$component->yAxis->line->setY($y2, $y1);
}
// Set Y axis range
foreach(array('left', 'right') as $axis) {
if($this->isAxisUsed($axis)) {
$min = $this->getRealYMin($axis);
$max = $this->getRealYMax($axis);
$interval = $max - $min;
$this->axis->{$axis}->setRange(
$min - $interval * $this->space->bottom / 100,
$max + $interval * $this->space->top / 100
);
// Auto-scaling mode
if($this->axis->{$axis}->isAuto()) {
$this->axis->{$axis}->autoScale();
}
}
}
if($this->axis->left->getLabelNumber() === NULL) {
$number = round(($y2 - $y1) / 75) + 2;
$this->axis->left->setLabelNumber($number);
}
if($this->axis->right->getLabelNumber() === NULL) {
$number = round(($y2 - $y1) / 75) + 2;
$this->axis->right->setLabelNumber($number);
}
// Center labels on X axis if needed
$test = array(PLOT_TOP => FALSE, PLOT_BOTTOM => FALSE);
for($i = 0; $i < count($this->components); $i++) {
$component = &$this->components[$i];
if($component->getValues() !== NULL) {
$axis = $component->getXAxis();
if($test[$axis] === FALSE) {
// Center labels for bar plots
if($component->getXCenter()) {
$size = $this->axis->{$axis}->getDistance(0, 1);
$this->axis->{$axis}->label->move($size / 2, 0);
$this->axis->{$axis}->label->hideLast(TRUE);
$test[$axis] = TRUE;
}
}
}
}
// Set axis labels
$labels = array();
for($i = $xMin; $i <= $xMax; $i++) {
$labels[] = $i;
}
if($this->axis->top->label->count() === 0) {
$this->axis->top->label->set($labels);
}
if($this->axis->bottom->label->count() === 0) {
$this->axis->bottom->label->set($labels);
}
// Set ticks
$this->axis->top->ticks['major']->setNumber($values);
$this->axis->bottom->ticks['major']->setNumber($values);
$this->axis->left->ticks['major']->setNumber($this->axis->left->getLabelNumber());
$this->axis->right->ticks['major']->setNumber($this->axis->right->getLabelNumber());
// Set X axis on zero
if($this->xAxisZero) {
$axis = $this->selectYAxis();
$this->axis->bottom->setYCenter($axis, 0);
$this->axis->top->setYCenter($axis, 0);
}
// Set Y axis on zero
if($this->yAxisZero) {
$axis = $this->selectXAxis();
$this->axis->left->setXCenter($axis, 1);
$this->axis->right->setXCenter($axis, 1);
}
parent::init($driver);
list($leftSpace, $rightSpace, $topSpace, $bottomSpace) = $this->getSpace($x2 - $x1, $y2 - $y1);
// Create the grid
$this->createGrid();
// Draw the grid
$this->grid->setSpace($leftSpace, $rightSpace, 0, 0);
$this->grid->draw($driver, $x1, $y1, $x2, $y2);
}
function drawComponent($driver, $x1, $y1, $x2, $y2, $aliasing) {
$xMin = $this->getXMin();
$xMax = $this->getXMax();
$maxLeft = $this->getRealYMax(PLOT_LEFT);
$maxRight = $this->getRealYMax(PLOT_RIGHT);
$minLeft = $this->getRealYMin(PLOT_LEFT);
$minRight = $this->getRealYMin(PLOT_RIGHT);
foreach($this->components as $component) {
$min = $component->getYMin();
$max = $component->getYMax();
// Set component minimum and maximum
if($component->getYAxis() === PLOT_LEFT) {
list($min, $max) = $this->axis->left->getRange();
$component->setYMin($min);
$component->setYMax($max);
} else {
list($min, $max) = $this->axis->right->getRange();
$component->setYMin($min);
$component->setYMax($max);
}
$component->setXAxisZero($this->xAxisZero);
$component->setYAxisZero($this->yAxisZero);
$component->xAxis->setRange($xMin, $xMax);
$component->drawComponent(
$driver,
$x1, $y1,
$x2, $y2,
$aliasing
);
$component->setYMin($min);
$component->setYMax($max);
}
}
function drawEnvelope($driver) {
list($x1, $y1, $x2, $y2) = $this->getPosition();
// Hide unused axis
foreach(array(PLOT_LEFT, PLOT_RIGHT, PLOT_TOP, PLOT_BOTTOM) as $axis) {
if($this->isAxisUsed($axis) === FALSE) {
$this->axis->{$axis}->hide(TRUE);
}
}
// Draw top axis
$top = $this->axis->top;
if($this->xAxisZero === FALSE) {
$top->line->setY($y1, $y1);
}
$top->draw($driver);
// Draw bottom axis
$bottom = $this->axis->bottom;
if($this->xAxisZero === FALSE) {
$bottom->line->setY($y2, $y2);
}
$bottom->draw($driver);
// Draw left axis
$left = $this->axis->left;
if($this->yAxisZero === FALSE) {
$left->line->setX($x1, $x1);
}
$left->draw($driver);
// Draw right axis
$right = $this->axis->right;
if($this->yAxisZero === FALSE) {
$right->line->setX($x2, $x2);
}
$right->draw($driver);
}
/**
* Is the specified axis used ?
*
* @param string $axis Axis name
* @return bool
*/
function isAxisUsed($axis) {
for($i = 0; $i < count($this->components); $i++) {
$component = $this->components[$i];
switch($axis) {
case PLOT_LEFT :
case PLOT_RIGHT :
if($component->getYAxis() === $axis) {
return TRUE;
}
break;
case PLOT_TOP :
case PLOT_BOTTOM :
if($component->getXAxis() === $axis) {
return TRUE;
}
break;
}
}
return FALSE;
}
function createGrid() {
$max = $this->getRealYMax(PLOT_LEFT);
$min = $this->getRealYMin(PLOT_RIGHT);
// Select axis (left if possible, right otherwise)
$axis = $this->selectYAxis();
$number = $axis->getLabelNumber() - 1;
if($number < 1) {
return;
}
// Horizontal lines of grid
$h = array();
for($i = 0; $i <= $number; $i++) {
$h[] = $i / $number;
}
// Vertical lines
$major = $axis->tick('major');
$interval = $major->getInterval();
$number = $this->getXAxisNumber() - 1;
$w = array();
if($number > 0) {
for($i = 0; $i <= $number; $i++) {
if($i%$interval === 0) {
$w[] = $i / $number;
}
}
}
$this->grid->setGrid($w, $h);
}
function selectYAxis(){
// Select axis (left if possible, right otherwise)
if($this->isAxisUsed(PLOT_LEFT)) {
$axis = $this->axis->left;
} else {
$axis = $this->axis->right;
}
return $axis;
}
function selectXAxis(){
// Select axis (bottom if possible, top otherwise)
if($this->isAxisUsed(PLOT_BOTTOM)) {
$axis = $this->axis->bottom;
} else {
$axis = $this->axis->top;
}
return $axis;
}
function getXAxisNumber() {
$offset = $this->components[0];
$max = $offset->getXAxisNumber();
for($i = 1; $i < count($this->components); $i++) {
$offset = $this->components[$i];
$max = max($max, $offset->getXAxisNumber());
}
return $max;
}
}
registerClass('PlotGroup');
?>

Source for file Plot.class.php