* @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/Plot.php */ require_once 'Image/Graph/Plot.php'; /** * A bar chart. * * @category Images * @package Image_Graph * @subpackage Plot * @author Jesper Veggerby * @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_Plot_Bar extends Image_Graph_Plot { /** * The space between 2 bars (should be a multipla of 2) * @var int * @access private */ var $_space = 4; /** * The width of the bars * @var array * @access private */ var $_width = 'auto'; /** * Perform the actual drawing on the legend. * * @param int $x0 The top-left x-coordinate * @param int $y0 The top-left y-coordinate * @param int $x1 The bottom-right x-coordinate * @param int $y1 The bottom-right y-coordinate * @access private */ function _drawLegendSample($x0, $y0, $x1, $y1) { $dx = abs($x1 - $x0) / 7; $this->_canvas->rectangle(array('x0' => $x0 + $dx, 'y0' => $y0, 'x1' => $x1 - $dx, 'y1' => $y1)); } /** * Set the spacing between 2 neighbouring bars * * @param int $space The number of pixels between 2 bars, should be a * multipla of 2 (ie an even number) */ function setSpacing($space) { $this->_space = (int) ($space / 2); } /** * Set the width of a bars. * * Specify 'auto' to auto calculate the width based on the positions on the * x-axis. * * Supported units are: * * '%' The width is specified in percentage of the total plot width * * 'px' The width specified in pixels * * @param string $width The width of any bar * @param string $unit The unit of the width */ function setBarWidth($width, $unit = false) { if ($width == 'auto') { $this->_width = $width; } else { $this->_width = array( 'width' => $width, 'unit' => $unit ); } } /** * Output the plot * * @return bool Was the output 'good' (true) or 'bad' (false). * @access private */ function _done() { if (parent::_done() === false) { return false; } if (!is_array($this->_dataset)) { return false; } $this->_canvas->startGroup(get_class($this) . '_' . $this->_title); $this->_clip(true); if ($this->_width == 'auto') { $width = $this->_parent->_labelDistance(IMAGE_GRAPH_AXIS_X) / 2; } elseif ($this->_width['unit'] == '%') { $width = $this->_width['width'] * $this->width() / 200; } elseif ($this->_width['unit'] == 'px') { $width = $this->_width['width'] / 2; } if ($this->_multiType == 'stacked100pct') { $total = $this->_getTotals(); } $minYaxis = $this->_parent->_getMinimum($this->_axisY); $maxYaxis = $this->_parent->_getMaximum($this->_axisY); $number = 0; $keys = array_keys($this->_dataset); foreach ($keys as $key) { $dataset =& $this->_dataset[$key]; $dataset->_reset(); while ($point = $dataset->_next()) { if ($this->_parent->_horizontal) { $y1 = $this->_pointY($point) - $width; $y2 = $this->_pointY($point) + $width; if ($y2 - $this->_space > $y1 + $this->_space) { /* * Take bar spacing into account _only_ if the space doesn't * turn the bar "inside-out", i.e. if the actual bar width * is smaller than the space between the bars */ $y2 -= $this->_space; $y1 += $this->_space; } } else { $x1 = $this->_pointX($point) - $width; $x2 = $this->_pointX($point) + $width; if ($x2 - $this->_space > $x1 + $this->_space) { /* * Take bar spacing into account _only_ if the space doesn't * turn the bar "inside-out", i.e. if the actual bar width * is smaller than the space between the bars */ $x2 -= $this->_space; $x1 += $this->_space; } } if (($this->_multiType == 'stacked') || ($this->_multiType == 'stacked100pct')) { $x = $point['X']; if ($point['Y'] >= 0) { if (!isset($current[$x])) { $current[$x] = 0; } if ($this->_multiType == 'stacked') { $p0 = array( 'X' => $point['X'], 'Y' => $current[$x] ); $p1 = array( 'X' => $point['X'], 'Y' => $current[$x] + $point['Y'] ); } else { $p0 = array( 'X' => $point['X'], 'Y' => 100 * $current[$x] / $total['TOTAL_Y'][$x] ); $p1 = array( 'X' => $point['X'], 'Y' => 100 * ($current[$x] + $point['Y']) / $total['TOTAL_Y'][$x] ); } $current[$x] += $point['Y']; } else { if (!isset($currentNegative[$x])) { $currentNegative[$x] = 0; } $p0 = array( 'X' => $point['X'], 'Y' => $currentNegative[$x] ); $p1 = array( 'X' => $point['X'], 'Y' => $currentNegative[$x] + $point['Y'] ); $currentNegative[$x] += $point['Y']; } } else { if (count($this->_dataset) > 1) { $w = 2 * ($width - $this->_space) / count($this->_dataset); if ($this->_parent->_horizontal) { $y2 = ($y1 = ($y1 + $y2) / 2 - ($width - $this->_space) + $number * $w) + $w; } else { $x2 = ($x1 = ($x1 + $x2) / 2 - ($width - $this->_space) + $number * $w) + $w; } } $p0 = array('X' => $point['X'], 'Y' => 0); $p1 = $point; } if ((($minY = min($p0['Y'], $p1['Y'])) < $maxYaxis) && (($maxY = max($p0['Y'], $p1['Y'])) > $minYaxis) ) { $p0['Y'] = $minY; $p1['Y'] = $maxY; if ($p0['Y'] < $minYaxis) { $p0['Y'] = '#min_pos#'; } if ($p1['Y'] > $maxYaxis) { $p1['Y'] = '#max_neg#'; } if ($this->_parent->_horizontal) { $x1 = $this->_pointX($p0); $x2 = $this->_pointX($p1); } else { $y1 = $this->_pointY($p0); $y2 = $this->_pointY($p1); } $ID = $point['ID']; if (($ID === false) && (count($this->_dataset) > 1)) { $ID = $key; } $this->_getFillStyle($ID); $this->_getLineStyle($ID); if (($y1 != $y2) && ($x1 != $x2)) { $this->_canvas->rectangle( $this->_mergeData( $point, array( 'x0' => min($x1, $x2), 'y0' => min($y1, $y2), 'x1' => max($x1, $x2), 'y1' => max($y1, $y2) ) ) ); } } } $number ++; } unset($keys); $this->_drawMarker(); $this->_clip(false); $this->_canvas->endGroup(); return true; } } ?>