219 lines
6.6 KiB
PHP
219 lines
6.6 KiB
PHP
<?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 Layout
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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: Layout.php,v 1.11 2005/09/14 20:27:25 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/Plotarea/Element.php
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*/
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require_once 'Image/Graph/Plotarea/Element.php';
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/**
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* Defines an area of the graph that can be layout'ed.
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*
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* Any class that extends this abstract class can be used within a layout on the canvas.
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*
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* @category Images
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* @package Image_Graph
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* @subpackage Layout
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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_Layout extends Image_Graph_Plotarea_Element
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{
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/**
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* Has the coordinates already been updated?
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* @var bool
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* @access private
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*/
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var $_updated = false;
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/**
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* Alignment of the area for each vertice (left, top, right, bottom)
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* @var array
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* @access private
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*/
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var $_alignSize = array ('left' => 0, 'top' => 0, 'right' => 0, 'bottom' => 0);
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/**
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* Image_Graph_Layout [Constructor]
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*/
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function Image_Graph_Layout()
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{
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parent::Image_Graph_Element();
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$this->_padding = 2;
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}
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/**
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* Resets the elements
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*
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* @access private
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*/
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function _reset()
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{
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parent::_reset();
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$this->_updated = false;
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}
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/**
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* Calculate the edge offset for a specific edge
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* @param array $alignSize The alignment of the edge
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* @param int $offset The offset/posision of the at 0% edge
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* @param int $total The total size (width or height) of the element
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* @param int $multiplier +/- 1 if the edge should pushed either toward more
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* negative or positive values
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* @since 0.3.0dev2
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* @access private
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*/
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function _calcEdgeOffset($alignSize, $offset, $total, $multiplier)
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{
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if ($alignSize['unit'] == 'percentage') {
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return $offset + $multiplier * ($total * $alignSize['value'] / 100);
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} elseif ($alignSize['unit'] == 'pixels') {
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if (($alignSize['value'] == 'auto_part1') || ($alignSize['value'] == 'auto_part2')) {
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$alignSize['value'] = $multiplier * $this->_parent->_getAbsolute($alignSize['value']);
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}
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if ($alignSize['value'] < 0) {
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return $offset + $multiplier * ($total + $alignSize['value']);
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} else {
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return $offset + $multiplier * $alignSize['value'];
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}
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}
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return $offset;
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}
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/**
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* Calculate the edges
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*
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* @access private
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*/
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function _calcEdges()
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{
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if ((is_array($this->_alignSize)) && (!$this->_updated)) {
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$left = $this->_calcEdgeOffset(
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$this->_alignSize['left'],
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$this->_parent->_fillLeft(),
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$this->_parent->_fillWidth(),
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+1
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);
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$top = $this->_calcEdgeOffset(
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$this->_alignSize['top'],
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$this->_parent->_fillTop(),
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$this->_parent->_fillHeight(),
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+1
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);
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$right = $this->_calcEdgeOffset(
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$this->_alignSize['right'],
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$this->_parent->_fillRight(),
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$this->_parent->_fillWidth(),
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-1
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);
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$bottom = $this->_calcEdgeOffset(
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$this->_alignSize['bottom'],
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$this->_parent->_fillBottom(),
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$this->_parent->_fillHeight(),
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-1
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);
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$this->_setCoords(
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$left + $this->_padding,
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$top + $this->_padding,
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$right - $this->_padding,
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$bottom - $this->_padding
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);
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}
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}
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/**
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* Update coordinates
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*
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* @access private
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*/
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function _updateCoords()
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{
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$this->_calcEdges();
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parent::_updateCoords();
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}
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/**
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* Pushes an edge of area a specific distance 'into' the canvas
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*
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* @param int $edge The edge of the canvas to align relative to
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* @param int $size The number of pixels or the percentage of the canvas total size to occupy relative to the selected alignment edge
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* @access private
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*/
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function _push($edge, $size = '100%')
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{
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$result = array();
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if (ereg("([0-9]*)\%", $size, $result)) {
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$this->_alignSize[$edge] = array(
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'value' => min(100, max(0, $result[1])),
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'unit' => 'percentage'
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);
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} else {
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$this->_alignSize[$edge] = array(
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'value' => $size,
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'unit' => 'pixels'
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);
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}
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}
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/**
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* Sets the coordinates of the element
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*
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* @param int $left The leftmost pixel of the element on the canvas
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* @param int $top The topmost pixel of the element on the canvas
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* @param int $right The rightmost pixel of the element on the canvas
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* @param int $bottom The bottommost pixel of the element on the canvas
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* @access private
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*/
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function _setCoords($left, $top, $right, $bottom)
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{
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parent::_setCoords($left, $top, $right, $bottom);
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$this->_updated = true;
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}
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/**
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* Returns the calculated "auto" size
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*
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* @return int The calculated auto size
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* @access private
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*/
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function _getAutoSize()
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{
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return false;
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}
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}
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?>
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