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Diffstat (limited to 'packages/dspam/pear/Image/Graph/Axis/Radar.php')
| -rw-r--r-- | packages/dspam/pear/Image/Graph/Axis/Radar.php | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/packages/dspam/pear/Image/Graph/Axis/Radar.php b/packages/dspam/pear/Image/Graph/Axis/Radar.php new file mode 100644 index 00000000..7348254c --- /dev/null +++ b/packages/dspam/pear/Image/Graph/Axis/Radar.php @@ -0,0 +1,204 @@ +<?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: $Id$ + * @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)); + } + +} + +?>
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