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2008-11-26 14:50:40 -08:00
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426
includes/pear/Image/Graph/Axis/Category.php Normal file
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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Class for axis handling.
*
* PHP versions 4 and 5
*
* LICENSE: This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version. This library is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details. You should have received a copy of
* the GNU Lesser General Public License along with this library; if not, write
* to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
* @category Images
* @package Image_Graph
* @subpackage Axis
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version CVS: $Id: Category.php,v 1.17 2005/10/05 20:51:23 nosey Exp $
* @link http://pear.php.net/package/Image_Graph
*/
/**
* Include file Image/Graph/Axis.php
*/
require_once 'Image/Graph/Axis.php';
/**
* A normal axis thats displays labels with a 'interval' of 1.
* This is basically a normal axis where the range is
* the number of labels defined, that is the range is explicitly defined
* when constructing the axis.
*
* @category Images
* @package Image_Graph
* @subpackage Axis
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Graph
*/
class Image_Graph_Axis_Category extends Image_Graph_Axis
{
/**
* The labels shown on the axis
* @var array
* @access private
*/
var $_labels = false;
/**
* Image_Graph_Axis_Category [Constructor].
*
* @param int $type The type (direction) of the Axis
*/
function Image_Graph_Axis_Category($type = IMAGE_GRAPH_AXIS_X)
{
parent::Image_Graph_Axis($type);
$this->_labels = array();
$this->setlabelInterval(1);
}
/**
* Gets the minimum value the axis will show.
*
* This is always 0
*
* @return double The minumum value
* @access private
*/
function _getMinimum()
{
return 0;
}
/**
* Gets the maximum value the axis will show.
*
* This is always the number of labels passed to the constructor.
*
* @return double The maximum value
* @access private
*/
function _getMaximum()
{
return count($this->_labels) - ($this->_pushValues ? 0 : 1);
}
/**
* Sets the minimum value the axis will show.
*
* A minimum cannot be set on a SequentialAxis, it is always 0.
*
* @param double Minimum The minumum value to use on the axis
* @access private
*/
function _setMinimum($minimum)
{
}
/**
* Sets the maximum value the axis will show
*
* A maximum cannot be set on a SequentialAxis, it is always the number
* of labels passed to the constructor.
*
* @param double Maximum The maximum value to use on the axis
* @access private
*/
function _setMaximum($maximum)
{
}
/**
* Forces the minimum value of the axis
*
* A minimum cannot be set on a SequentialAxis, it is always 0.
*
* @param double $minimum The minumum value to use on the axis
*/
function forceMinimum($minimum, $userEnforce = true)
{
}
/**
* Forces the maximum value of the axis
*
* A maximum cannot be set on a SequentialAxis, it is always the number
* of labels passed to the constructor.
*
* @param double $maximum The maximum value to use on the axis
*/
function forceMaximum($maximum, $userEnforce = true)
{
}
/**
* Sets an interval for where labels are shown on the axis.
*
* The label interval is rounded to nearest integer value
*
* @param double $labelInterval The interval with which labels are shown
*/
function setLabelInterval($labelInterval = 'auto', $level = 1)
{
if ($labelInterval == 'auto') {
parent::setLabelInterval(1);
} else {
parent::setLabelInterval(round($labelInterval));
}
}
/**
* Preprocessor for values, ie for using logarithmic axis
*
* @param double $value The value to preprocess
* @return double The preprocessed value
* @access private
*/
function _value($value)
{
// $the_value = array_search($value, $this->_labels);
if (isset($this->_labels[$value])) {
$the_value = $this->_labels[$value];
if ($the_value !== false) {
return $the_value + ($this->_pushValues ? 0.5 : 0);
} else {
return 0;
}
}
}
/**
* Get the minor label interval with which axis label ticks are drawn.
*
* For a sequential axis this is always disabled (i.e false)
*
* @return double The minor label interval, always false
* @access private
*/
function _minorLabelInterval()
{
return false;
}
/**
* Get the size in pixels of the axis.
*
* For an x-axis this is the width of the axis including labels, and for an
* y-axis it is the corrresponding height
*
* @return int The size of the axis
* @access private
*/
function _size()
{
if (!$this->_visible) {
return 0;
}
$this->_canvas->setFont($this->_getFont());
$maxSize = 0;
foreach($this->_labels as $label => $id) {
$labelPosition = $this->_point($label);
if (is_object($this->_dataPreProcessor)) {
$labelText = $this->_dataPreProcessor->_process($label);
} else {
$labelText = $label;
}
if ((($this->_type == IMAGE_GRAPH_AXIS_X) && (!$this->_transpose)) ||
(($this->_type != IMAGE_GRAPH_AXIS_X) && ($this->_transpose)))
{
$maxSize = max($maxSize, $this->_canvas->textHeight($labelText));
} else {
$maxSize = max($maxSize, $this->_canvas->textWidth($labelText));
}
}
if ($this->_title) {
$this->_canvas->setFont($this->_getTitleFont());
if ((($this->_type == IMAGE_GRAPH_AXIS_X) && (!$this->_transpose)) ||
(($this->_type != IMAGE_GRAPH_AXIS_X) && ($this->_transpose)))
{
$maxSize += $this->_canvas->textHeight($this->_title);
} else {
$maxSize += $this->_canvas->textWidth($this->_title);
}
$maxSize += 10;
}
return $maxSize +3;
}
/**
* Apply the dataset to the axis.
*
* This calculates the order of the categories, which is very important
* for fx. line plots, so that the line does not "go backwards", consider
* these X-sets:<p>
* 1: (1, 2, 3, 4, 5, 6)<br>
* 2: (0, 1, 2, 3, 4, 5, 6, 7)<p>
* If they are not ordered, but simply appended, the categories on the axis
* would be:<p>
* X: (1, 2, 3, 4, 5, 6, 0, 7)<p>
* Which would render the a line for the second plot to show incorrectly.
* Instead this algorithm, uses and 'value- is- before' method to see that
* the 0 is before a 1 in the second set, and that it should also be before
* a 1 in the X set. Hence:<p>
* X: (0, 1, 2, 3, 4, 5, 6, 7)
*
* @param Image_Graph_Dataset $dataset The dataset
* @access private
*/
function _applyDataset(&$dataset)
{
$newLabels = array();
$allLabels = array();
$dataset->_reset();
$count = 0;
$count_new = 0;
while ($point = $dataset->_next()) {
if ($this->_type == IMAGE_GRAPH_AXIS_X) {
$data = $point['X'];
} else {
$data = $point['Y'];
}
if (!isset($this->_labels[$data])) {
$newLabels[$data] = $count_new++;
//$this->_labels[] = $data;
}
$allLabels[$data] = $count++;
}
if (count($this->_labels) == 0) {
$this->_labels = $newLabels;
} elseif ((is_array($newLabels)) && (count($newLabels) > 0)) {
// get all intersecting labels
$intersect = array_intersect(array_keys($allLabels), array_keys($this->_labels));
// traverse all new and find their relative position withing the
// intersec, fx value X0 is before X1 in the intersection, which
// means that X0 should be placed before X1 in the label array
foreach($newLabels as $newLabel => $id) {
$key = $allLabels[$newLabel];
reset($intersect);
$this_value = false;
// intersect indexes are the same as in allLabels!
$first = true;
while ((list($id, $value) = each($intersect)) &&
($this_value === false))
{
if (($first) && ($id > $key)) {
$this_value = $value;
} elseif ($id >= $key) {
$this_value = $value;
}
$first = false;
}
if ($this_value === false) {
// the new label was not found before anything in the
// intersection -> append it
$this->_labels[$newLabel] = count($this->_labels);
} else {
// the new label was found before $this_value in the
// intersection, insert the label before this position in
// the label array
// $key = $this->_labels[$this_value];
$keys = array_keys($this->_labels);
$key = array_search($this_value, $keys);
$pre = array_slice($keys, 0, $key);
$pre[] = $newLabel;
$post = array_slice($keys, $key);
$this->_labels = array_flip(array_merge($pre, $post));
}
}
unset($keys);
}
$labels = array_keys($this->_labels);
$i = 0;
foreach ($labels as $label) {
$this->_labels[$label] = $i++;
}
// $this->_labels = array_values(array_unique($this->_labels));
$this->_calcLabelInterval();
}
/**
* Return the label distance.
*
* @return int The distance between 2 adjacent labels
* @access private
*/
function _labelDistance($level = 1)
{
reset($this->_labels);
list($l1) = each($this->_labels);
list($l2) = each($this->_labels);
return abs($this->_point($l2) - $this->_point($l1));
}
/**
* Get next label point
*
* @param doubt $point The current point, if omitted or false, the first is
* returned
* @return double The next label point
* @access private
*/
function _getNextLabel($currentLabel = false, $level = 1)
{
if ($currentLabel === false) {
reset($this->_labels);
}
$result = false;
$count = ($currentLabel === false ? $this->_labelInterval() - 1 : 0);
while ($count < $this->_labelInterval()) {
$result = (list($label) = each($this->_labels));
$count++;
}
if ($result) {
return $label;
} else {
return false;
}
}
/**
* Is the axis numeric or not?
*
* @return bool True if numeric, false if not
* @access private
*/
function _isNumeric()
{
return false;
}
/**
* Output the axis
*
* @return bool Was the output 'good' (true) or 'bad' (false).
* @access private
*/
function _done()
{
$result = true;
if (Image_Graph_Element::_done() === false) {
$result = false;
}
$this->_canvas->startGroup(get_class($this));
$this->_drawAxisLines();
$this->_canvas->startGroup(get_class($this) . '_ticks');
$label = false;
while (($label = $this->_getNextLabel($label)) !== false) {
$this->_drawTick($label);
}
$this->_canvas->endGroup();
$this->_canvas->endGroup();
return $result;
}
}
?>

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includes/pear/Image/Graph/Axis/Logarithmic.php Normal file
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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Class for axis handling.
*
* PHP versions 4 and 5
*
* LICENSE: This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version. This library is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details. You should have received a copy of
* the GNU Lesser General Public License along with this library; if not, write
* to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
* @category Images
* @package Image_Graph
* @subpackage Axis
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version CVS: $Id: Logarithmic.php,v 1.13 2005/09/25 17:52:17 nosey Exp $
* @link http://pear.php.net/package/Image_Graph
*/
/**
* Include file Image/Graph/Axis.php
*/
require_once 'Image/Graph/Axis.php';
/**
* Diplays a logarithmic axis (either X- or Y-axis).
*
* @category Images
* @package Image_Graph
* @subpackage Axis
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Graph
*/
class Image_Graph_Axis_Logarithmic extends Image_Graph_Axis
{
/**
* Image_Graph_AxisLogarithmic [Constructor].
*
* Normally a manual creation should not be necessary, axis are
* created automatically by the {@link Image_Graph_Plotarea} constructor
* unless explicitly defined otherwise
*
* @param int $type The type (direction) of the Axis, use IMAGE_GRAPH_AXIS_X
* for an X-axis (default, may be omitted) and IMAGE_GRAPH_AXIS_Y for Y-
* axis)
*/
function Image_Graph_Axis_Logarithmic($type = IMAGE_GRAPH_AXIS_X)
{
parent::Image_Graph_Axis($type);
$this->showLabel(IMAGE_GRAPH_LABEL_MINIMUM + IMAGE_GRAPH_LABEL_MAXIMUM);
}
/**
* Calculate the label interval
*
* If explicitly defined this will be calucated to an approximate best.
*
* @return double The label interval
* @access private
*/
function _calcLabelInterval()
{
$result = parent::_calcLabelInterval();
$this->_axisValueSpan = $this->_value($this->_axisSpan);
return $result;
}
/**
* Forces the minimum value of the axis.
*
* For an logarithimc axis this is always 0
*
* @param double $minimum The minumum value to use on the axis
*/
function forceMinimum($minimum)
{
parent::forceMinimum(0);
}
/**
* Gets the minimum value the axis will show.
*
* For an logarithimc axis this is always 0
*
* @return double The minumum value
* @access private
*/
function _getMinimum()
{
return 0;
}
/**
* Preprocessor for values, ie for using logarithmic axis
*
* @param double $value The value to preprocess
* @return double The preprocessed value
* @access private
*/
function _value($value)
{
return log10($value);
}
/**
* Get next label point
*
* @param doubt $point The current point, if omitted or false, the first is
* returned
* @return double The next label point
* @access private
*/
function _getNextLabel($currentLabel = false, $level = 1)
{
if (is_array($this->_labelOptions[$level]['interval'])) {
return parent::_getNextLabel($currentLabel, $level);
}
if ($currentLabel !== false) {
$value = log10($currentLabel);
$base = floor($value);
$frac = $value - $base;
for ($i = 2; $i < 10; $i++) {
if ($frac <= (log10($i)-0.01)) {
$label = pow(10, $base)*$i;
if ($label > $this->_getMaximum()) {
return false;
} else {
return $label;
}
}
}
return pow(10, $base+1);
}
return 1;
}
/**
* Get the axis intersection pixel position
*
* This is only to be called prior to output! I.e. between the user
* invokation of Image_Graph::done() and any actual output is performed.
* This is because it can change the axis range.
*
* @param double $value the intersection value to get the pixel-point for
* @return double The pixel position along the axis
* @access private
*/
function _intersectPoint($value)
{
if (($value <= 0) && ($value !== 'max') && ($value !== 'min')) {
$value = 1;
}
return parent::_intersectPoint($value);
}
}
?>

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includes/pear/Image/Graph/Axis/Marker/Area.php Normal file
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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Class file containing a axis marker used for explicitly highlighting a area
* on the graph, based on an interval specified on an axis.
*
* PHP versions 4 and 5
*
* LICENSE: This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version. This library is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details. You should have received a copy of
* the GNU Lesser General Public License along with this library; if not, write
* to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
* @category Images
* @package Image_Graph
* @subpackage Grid
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version CVS: $Id: Area.php,v 1.11 2005/08/24 20:36:04 nosey Exp $
* @link http://pear.php.net/package/Image_Graph
*/
/**
* Include file Image/Graph/Grid.php
*/
require_once 'Image/Graph/Grid.php';
/**
* Display a grid
*
* {@link Image_Graph_Grid}
*
* @category Images
* @package Image_Graph
* @subpackage Grid
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Graph
*/
class Image_Graph_Axis_Marker_Area extends Image_Graph_Grid
{
/**
* The lower bound
* @var double
* @access private
*/
var $_lower = false;
/**
* The upper bound
* @var double
* @access private
*/
var $_upper = false;
/**
* [Constructor]
*/
function Image_Graph_Axis_Marker_Area()
{
parent::Image_Graph_Grid();
$this->_lineStyle = false;
}
/**
* Sets the lower bound of the area (value on the axis)
*
* @param double $lower the lower bound
*/
function setLowerBound($lower)
{
$this->_lower = $lower;
}
/**
* Sets the upper bound of the area (value on the axis)
*
* @param double $upper the upper bound
*/
function setUpperBound($upper)
{
$this->_upper = $upper;
}
/**
* Output the grid
*
* @return bool Was the output 'good' (true) or 'bad' (false).
* @access private
*/
function _done()
{
if (parent::_done() === false) {
return false;
}
if (!$this->_primaryAxis) {
return false;
}
$this->_canvas->startGroup(get_class($this));
$i = 0;
$this->_lower = max($this->_primaryAxis->_getMinimum(), $this->_lower);
$this->_upper = min($this->_primaryAxis->_getMaximum(), $this->_upper);
$secondaryPoints = $this->_getSecondaryAxisPoints();
reset($secondaryPoints);
list ($id, $previousSecondaryValue) = each($secondaryPoints);
while (list ($id, $secondaryValue) = each($secondaryPoints)) {
if ($this->_primaryAxis->_type == IMAGE_GRAPH_AXIS_X) {
$p1 = array ('Y' => $secondaryValue, 'X' => $this->_lower);
$p2 = array ('Y' => $previousSecondaryValue, 'X' => $this->_lower);
$p3 = array ('Y' => $previousSecondaryValue, 'X' => $this->_upper);
$p4 = array ('Y' => $secondaryValue, 'X' => $this->_upper);
} else {
$p1 = array ('X' => $secondaryValue, 'Y' => $this->_lower);
$p2 = array ('X' => $previousSecondaryValue, 'Y' => $this->_lower);
$p3 = array ('X' => $previousSecondaryValue, 'Y' => $this->_upper);
$p4 = array ('X' => $secondaryValue, 'Y' => $this->_upper);
}
$this->_canvas->addVertex(array('x' => $this->_pointX($p1), 'y' => $this->_pointY($p1)));
$this->_canvas->addVertex(array('x' => $this->_pointX($p2), 'y' => $this->_pointY($p2)));
$this->_canvas->addVertex(array('x' => $this->_pointX($p3), 'y' => $this->_pointY($p3)));
$this->_canvas->addVertex(array('x' => $this->_pointX($p4), 'y' => $this->_pointY($p4)));
$previousSecondaryValue = $secondaryValue;
$this->_getLineStyle();
$this->_getFillStyle();
$this->_canvas->polygon(array('connect' => true));
}
$this->_canvas->endGroup();
return true;
}
}
?>

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includes/pear/Image/Graph/Axis/Marker/Line.php Normal file
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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Class file containing a axis marker used for explicitly highlighting a point
* (line) on the graph, based on an value specified on an axis.
*
* PHP versions 4 and 5
*
* LICENSE: This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version. This library is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details. You should have received a copy of
* the GNU Lesser General Public License along with this library; if not, write
* to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
* @category Images
* @package Image_Graph
* @subpackage Grid
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version CVS: $Id: Line.php,v 1.11 2005/08/03 21:21:58 nosey Exp $
* @link http://pear.php.net/package/Image_Graph
*/
/**
* Include file Image/Graph/Grid.php
*/
require_once 'Image/Graph/Grid.php';
/**
* Display a grid
*
* {@link Image_Graph_Grid}
*
* @category Images
* @package Image_Graph
* @subpackage Grid
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Graph
*/
class Image_Graph_Axis_Marker_Line extends Image_Graph_Grid
{
/**
* The value
* @var double
* @access private
*/
var $_value = false;
/**
* Sets the value of the line marker (value on the axis)
*
* @param double $value the value
*/
function setValue($value)
{
$this->_value = $value;
}
/**
* Output the grid
*
* @return bool Was the output 'good' (true) or 'bad' (false).
* @access private
*/
function _done()
{
if (parent::_done() === false) {
return false;
}
if (!$this->_primaryAxis) {
return false;
}
$this->_canvas->startGroup(get_class($this));
$i = 0;
$this->_value = min($this->_primaryAxis->_getMaximum(), max($this->_primaryAxis->_getMinimum(), $this->_value));
$secondaryPoints = $this->_getSecondaryAxisPoints();
reset($secondaryPoints);
list ($id, $previousSecondaryValue) = each($secondaryPoints);
while (list ($id, $secondaryValue) = each($secondaryPoints)) {
if ($this->_primaryAxis->_type == IMAGE_GRAPH_AXIS_X) {
$p1 = array ('X' => $this->_value, 'Y' => $secondaryValue);
$p2 = array ('X' => $this->_value, 'Y' => $previousSecondaryValue);
} else {
$p1 = array ('X' => $secondaryValue, 'Y' => $this->_value);
$p2 = array ('X' => $previousSecondaryValue, 'Y' => $this->_value);
}
$x1 = $this->_pointX($p1);
$y1 = $this->_pointY($p1);
$x2 = $this->_pointX($p2);
$y2 = $this->_pointY($p2);
$previousSecondaryValue = $secondaryValue;
$this->_getLineStyle();
$this->_canvas->line(array('x0' => $x1, 'y0' => $y1, 'x1' => $x2, 'y1' => $y2));
}
$this->_canvas->endGroup();
return true;
}
}
?>

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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Class for axis handling.
*
* PHP versions 4 and 5
*
* LICENSE: This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version. This library is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details. You should have received a copy of
* the GNU Lesser General Public License along with this library; if not, write
* to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
* @category Images
* @package Image_Graph
* @subpackage Axis
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version CVS: $Id: Radar.php,v 1.6 2005/08/03 21:22:11 nosey Exp $
* @link http://pear.php.net/package/Image_Graph
*/
/**
* Include file Image/Graph/Axis/Category.php
*/
require_once 'Image/Graph/Axis/Category.php';
/**
* Displays an 'X'-axis in a radar plot chart.
*
* This axis maps the number of elements in the dataset to a angle (from 0-
* 360 degrees). Displaying the axis consist of drawing a number of lines from
* center to the edge of the 'circle' than encloses the radar plot. The labels
* are drawn on the 'ends' of these radial lines.
*
* @category Images
* @package Image_Graph
* @subpackage Axis
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Graph
*/
class Image_Graph_Axis_Radar extends Image_Graph_Axis_Category
{
/**
* Specifies the number of pixels, the labels is offsetted from the end of
* the axis
*
* @var int
* @access private
*/
var $_distanceFromEnd = 5;
/**
* Gets the minimum value the axis will show.
*
* This is always 0
*
* @return double The minumum value
* @access private
*/
function _getMinimum()
{
return 0;
}
/**
* Gets the maximum value the axis will show.
*
* This is always the number of labels passed to the constructor.
*
* @return double The maximum value
* @access private
*/
function _getMaximum()
{
return count($this->_labels);
}
/**
* Calculate the delta value (the number of pixels representing one unit
* on the axis)
*
* @return double The label interval
* @access private
*/
function _calcDelta()
{
if (abs($this->_getMaximum() - $this->_getMinimum()) == 0) {
$this->_delta = false;
} else {
$this->_delta = 360 / ($this->_getMaximum() - $this->_getMinimum());
}
}
/**
* Get the pixel position represented by a value on the canvas
*
* @param double $value the value to get the pixel-point for
* @return double The pixel position along the axis
* @access private
*/
function _point($value)
{
return (90 + (int) ($this->_value($value) * $this->_delta)) % 360;
}
/**
* Get the size in pixels of the axis.
*
* For a radar plot this is always 0
*
* @return int The size of the axis
* @access private
*/
function _size()
{
return 0;
}
/**
* Sets the distance from the end of the category lines to the label.
*
* @param int $distance The distance in pixels
*/
function setDistanceFromEnd($distance = 5)
{
$this->_distanceFromEnd = $distance;
}
/**
* Draws axis lines.
*
* @access private
*/
function _drawAxisLines()
{
}
/**
* Output an axis tick mark.
*
* @param int $value The value to output
* @access private
*/
function _drawTick($value, $level = 1)
{
$centerX = (int) (($this->_left + $this->_right) / 2);
$centerY = (int) (($this->_top + $this->_bottom) / 2);
$radius = min($this->height(), $this->width()) / 2;
$endPoint = array ('X' => $value, 'Y' => '#max#');
$dX = $this->_pointX($endPoint);
$dY = $this->_pointY($endPoint);
$offX = ($dX - $centerX);
$offY = ($dY - $centerY);
$hyp = sqrt($offX*$offX + $offY*$offY);
if ($hyp != 0) {
$scale = $this->_distanceFromEnd / $hyp;
} else {
$scale = 1;
}
$adX = $dX + $offX * $scale;
$adY = $dY + $offY * $scale;
if (is_object($this->_dataPreProcessor)) {
$labelText = $this->_dataPreProcessor->_process($value);
} else {
$labelText = $value;
}
if ((abs($dX - $centerX) < 1.5) && ($dY < $centerY)) {
$align = IMAGE_GRAPH_ALIGN_BOTTOM + IMAGE_GRAPH_ALIGN_CENTER_X;
} elseif ((abs($dX - $centerX) < 1.5) && ($dY > $centerY)) {
$align = IMAGE_GRAPH_ALIGN_TOP + IMAGE_GRAPH_ALIGN_CENTER_X;
} elseif ($dX < $centerX) {
$align = IMAGE_GRAPH_ALIGN_RIGHT + IMAGE_GRAPH_ALIGN_CENTER_Y;
} else {
$align = IMAGE_GRAPH_ALIGN_LEFT + IMAGE_GRAPH_ALIGN_CENTER_Y;
}
$this->write($adX, $adY, $labelText, $align);
$this->_getLineStyle();
$this->_canvas->line(array('x0' => $centerX, 'y0' => $centerY, 'x1' => $dX, 'y1' => $dY));
}
}
?>