Initial Commit of AgileBill Open Source
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175
includes/pear/Image/Graph/Grid.php
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175
includes/pear/Image/Graph/Grid.php
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* Image_Graph - PEAR PHP OO Graph Rendering Utility.
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*
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* PHP versions 4 and 5
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*
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* LICENSE: This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version. This library is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
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* General Public License for more details. You should have received a copy of
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* the GNU Lesser General Public License along with this library; if not, write
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* to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*
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* @category Images
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* @package Image_Graph
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* @subpackage Grid
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* @author Jesper Veggerby <pear.nosey@veggerby.dk>
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* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
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* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
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* @version CVS: $Id: Grid.php,v 1.8 2005/02/21 20:49:47 nosey Exp $
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* @link http://pear.php.net/package/Image_Graph
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*/
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/**
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* Include file Image/Graph/Element.php
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*/
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require_once 'Image/Graph/Element.php';
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/**
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* A grid displayed on the plotarea.
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*
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* A grid is associated with a primary and a secondary axis. The grid is
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* displayed in context of the primary axis' label interval - meaning that a
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* grid for an Y-axis displays a grid for every label on the y-axis (fx. a {@link
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* Image_Graph_Grid_Lines}, which displays horizontal lines for every label on
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* the y-axis from the x-axis minimum to the x-axis maximum). You should always
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* add the grid as one of the first elements to the plotarea. This is due to the
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* fact that elements are 'outputted' in the order they are added, i.e. if an
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* grid is added *after* a chart, the grid will be displayed on top of the chart
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* which is (probably) not desired.
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*
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* @category Images
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* @package Image_Graph
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* @subpackage Grid
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* @author Jesper Veggerby <pear.nosey@veggerby.dk>
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* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
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* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
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* @version Release: @package_version@
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* @link http://pear.php.net/package/Image_Graph
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* @abstract
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*/
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class Image_Graph_Grid extends Image_Graph_Plotarea_Element
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{
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/**
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* The primary axis: the grid 'refers' to
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* @var Axis
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* @access private
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*/
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var $_primaryAxis = null;
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/**
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* The secondary axis
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* @var Axis
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* @access private
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*/
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var $_secondaryAxis = null;
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/**
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* Set the primary axis: the grid should 'refer' to
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*
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* @param Image_Graph_Axis $axis The axis
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* @access private
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*/
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function _setPrimaryAxis(& $axis)
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{
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$this->_primaryAxis =& $axis;
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}
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/**
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* Set the secondary axis
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*
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* @param Image_Graph_Axis $axis The axis
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* @access private
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*/
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function _setSecondaryAxis(& $axis)
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{
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$this->_secondaryAxis =& $axis;
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}
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/**
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* Get the points on the secondary axis that the grid should 'connect'
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*
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* @return array The secondary data values that should mark the grid 'end points'
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* @access private
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*/
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function _getSecondaryAxisPoints()
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{
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if (is_a($this->_secondaryAxis, 'Image_Graph_Axis_Radar')) {
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$secondaryValue = false;
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$firstValue = $secondaryValue;
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while (($secondaryValue = $this->_secondaryAxis->_getNextLabel($secondaryValue)) !== false) {
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$secondaryAxisPoints[] = $secondaryValue;
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}
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$secondaryAxisPoints[] = $firstValue;
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} else {
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$secondaryAxisPoints = array ('#min#', '#max#');
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}
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return $secondaryAxisPoints;
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}
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/**
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* Get the X pixel position represented by a value
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*
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* @param double $point the value to get the pixel-point for
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* @return double The pixel position along the axis
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* @access private
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*/
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function _pointX($point)
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{
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if (($this->_primaryAxis->_type == IMAGE_GRAPH_AXIS_Y) ||
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($this->_primaryAxis->_type == IMAGE_GRAPH_AXIS_Y_SECONDARY))
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{
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$point['AXIS_Y'] = $this->_primaryAxis->_type;
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} else {
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$point['AXIS_Y'] = $this->_secondaryAxis->_type;
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}
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return parent::_pointX($point);
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}
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/**
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* Get the Y pixel position represented by a value
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*
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* @param double $point the value to get the pixel-point for
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* @return double The pixel position along the axis
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* @access private
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*/
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function _pointY($point)
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{
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if (($this->_primaryAxis->_type == IMAGE_GRAPH_AXIS_Y) ||
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($this->_primaryAxis->_type == IMAGE_GRAPH_AXIS_Y_SECONDARY))
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{
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$point['AXIS_Y'] = $this->_primaryAxis->_type;
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} else {
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$point['AXIS_Y'] = $this->_secondaryAxis->_type;
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}
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return parent::_pointY($point);
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}
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/**
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* Causes the object to update all sub elements coordinates.
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*
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* @access private
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*/
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function _updateCoords()
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{
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$this->_setCoords(
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$this->_parent->_plotLeft,
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$this->_parent->_plotTop,
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$this->_parent->_plotRight,
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$this->_parent->_plotBottom
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);
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parent::_updateCoords();
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}
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}
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?>
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