treemenu.php

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            $this->$option = $value;
        }
    }

    /**
    * Allows setting of various parameters after the initial
    * constructor call. Possible options you can set are:
    *  o text
    *  o link
    *  o icon
    *  o cssClass
    *  o expanded
    *  o isDynamic
    *  o ensureVisible
    * ie The same options as in the constructor
    *
    * @access public
    * @param  string $option Option to set
    * @param  string $value  Value to set the option to
    */
    function setOption($option, $value)
    {
        $this->$option = $value;
    }

    /**
    * Adds a new subnode to this node.
    *
    * @access public
    * @param  object $node The new node
    */
    function &addItem(&$node)
    {
        $node->parent  = &$this;
        $this->items[] = &$node;

        /**
        * If the subnode has ensureVisible set it needs
        * to be handled, and all parents set accordingly.
        */
        if ($node->ensureVisible) {
            $this->_ensureVisible();
        }

        return $this->items[count($this->items) - 1];
    }

    /**
    * Private function to handle ensureVisible stuff
    *
    * @access private
    */
    function _ensureVisible()
    {
        $this->ensureVisible = true;
        $this->expanded      = true;

        if (!is_null($this->parent)) {
            $this->parent->_ensureVisible();
        }
    }
} // HTML_TreeNode


/**
* HTML_TreeMenu_Presentation class
*
* Base class for other presentation classes to
* inherit from.
*/
class HTML_TreeMenu_Presentation
{
    /**
    * The TreeMenu structure
    * @var object
    */
    var $menu;

    /**
    * Base constructor simply sets the menu object
    *
    * @param object $structure The menu structure
    */
    function HTML_TreeMenu_Presentation(&$structure)
    {
        $this->menu = &$structure;
    }

    /**
    * Prints the HTML generated by the toHTML() method.
    * toHTML() must therefore be defined by the derived
    * class.
    *
    * @access public
    * @param  array  Options to set. Any options taken by
    *                the presentation class can be specified
    *                here.
    */
    function printMenu($options = array())
    {
        foreach ($options as $option => $value) {
            $this->$option = $value;
        }

        echo $this->toHTML();
    }
}


/**
* HTML_TreeMenu_DHTML class
*
* This class is a presentation class for the tree structure
* created using the TreeMenu/TreeNode. It presents the
* traditional tree, static for browsers that can't handle
* the DHTML.
*/
class HTML_TreeMenu_DHTML extends HTML_TreeMenu_Presentation
{
    /**
    * Dynamic status of the treemenu. If true (default) this has no effect. If
    * false it will override all dynamic status vars and set the menu to be
    * fully expanded an non-dynamic.
    */
    var $isDynamic;

    /**
    * Path to the images
    * @var string
    */
    var $images;

    /**
    * Target for the links generated
    * @var string
    */
    var $linkTarget;

    /**
    * Whether to use clientside persistence or not
    * @var bool
    */
    var $usePersistence;

    /**
    * The default CSS class for the nodes
    */
    var $defaultClass;

    /**
    * Whether to skip first level branch images
    * @var bool
    */
    var $noTopLevelImages;
    
    /**
    * Name of Jabbascript object to use
    * @var string
    */
    var $jsObjectName;

    /**
    * Constructor, takes the tree structure as
    * an argument and an array of options which
    * can consist of:
    *  o images            -  The path to the images folder. Defaults to "images"
    *  o linkTarget        -  The target for the link. Defaults to "_self"
    *  o defaultClass      -  The default CSS class to apply to a node. Default is none.
    *  o usePersistence    -  Whether to use clientside persistence. This persistence
    *                         is achieved using cookies. Default is true.
    *  o noTopLevelImages  -  Whether to skip displaying the first level of images if
    *                         there is multiple top level branches.
    *  o maxDepth          -  The maximum depth of indentation. Useful for ensuring
    *                         deeply nested trees don't go way off to the right of your
    *                         page etc. Defaults to no limit.
    *  o jsObjectName      -  Name to use for jabbascript object. Set this if you have
    *                         different menus that should maintain their persistence
    *                         information separately.
    *
    * And also a boolean for whether the entire tree is dynamic or not.
    * This overrides any perNode dynamic settings.
    *
    * @param object $structure The menu structure
    * @param array  $options   Array of options
    * @param bool   $isDynamic Whether the tree is dynamic or not
    */
    function HTML_TreeMenu_DHTML(&$structure, $options = array(), $isDynamic = true)
    {
        $this->HTML_TreeMenu_Presentation($structure);
        $this->isDynamic = $isDynamic;

        // Defaults
        $this->images           = 'images';
        $this->maxDepth         = 0;        // No limit
        $this->linkTarget       = '_self';
        $this->jsObjectName     = 'objTreeMenu';
        $this->defaultClass     = '';
        $this->usePersistence   = true;
        $this->noTopLevelImages = false;

        foreach ($options as $option => $value) {
            $this->$option = $value;
        }
    }

    /**
    * Returns the HTML for the menu. This method can be
    * used instead of printMenu() to use the menu system
    * with a template system.
    *
    * @access public
    * @return string The HTML for the menu
    */
    function toHTML()
    {
        static $count = 0;
        $menuObj     = $this->jsObjectName . '_' . ++$count;

        $html  = "\n";
        $html .= '<script language="javascript" type="text/javascript">' . "\n//<![CDATA[\n\t";
        $html .= sprintf('%s = new TreeMenu("%s", "%s", "%s", "%s", %s, %s);',
                         $menuObj,
                         $this->images,
                         $menuObj,
                         $this->linkTarget,
                         $this->defaultClass,
                         $this->usePersistence ? 'true' : 'false',
                         $this->noTopLevelImages ? 'true' : 'false');

        $html .= "\n";

        /**
        * Loop through subnodes
        */
        if (isset($this->menu->items)) {
            for ($i=0; $i<count($this->menu->items); $i++) {
                $html .= $this->_nodeToHTML($this->menu->items[$i], $menuObj);
            }
        }

        $html .= sprintf("\n\t%s.drawMenu();", $menuObj);
        $html .= sprintf("\n\t%s.writeOutput();", $menuObj);

        if ($this->usePersistence && $this->isDynamic) {
            $html .= sprintf("\n\t%s.resetBranches();", $menuObj);
        }
        $html .= "\n// ]]>\n</script>";

        return $html;
    }

    /**
    * Prints a node of the menu
    *
    * @access private
    */
    function _nodeToHTML($nodeObj, $prefix, $return = 'newNode', $currentDepth = 0, $maxDepthPrefix = null)
    {
        $prefix = empty($maxDepthPrefix) ? $prefix : $maxDepthPrefix;
        
        $expanded  = $this->isDynamic ? ($nodeObj->expanded  ? 'true' : 'false') : 'true';
        $isDynamic = $this->isDynamic ? ($nodeObj->isDynamic ? 'true' : 'false') : 'false';
        $html = sprintf("\t %s = %s.addItem(new TreeNode('%s', %s, %s, %s, %s, '%s', '%s', %s));\n",
                        $return,
                        $prefix,
                        str_replace("'", "\\'", $nodeObj->text),
                        !empty($nodeObj->icon) ? "'" . $nodeObj->icon . "'" : 'null',
                        !empty($nodeObj->link) ? "'" . $nodeObj->link . "'" : 'null',
                        $expanded,
                        $isDynamic,
                        $nodeObj->cssClass,
                        $nodeObj->linkTarget,
                        !empty($nodeObj->expandedIcon) ? "'" . $nodeObj->expandedIcon . "'" : 'null');

        foreach ($nodeObj->events as $event => $handler) {
            $html .= sprintf("\t %s.setEvent('%s', '%s');\n",
                             $return,
                             $event,
                             str_replace(array("\r", "\n", "'"), array('\r', '\n', "\'"), $handler));
        }

        if ($this->maxDepth > 0 AND $currentDepth == $this->maxDepth) {
            $maxDepthPrefix = $prefix;
        }

        /**
        * Loop through subnodes
        */
        if (!empty($nodeObj->items)) {
            for ($i=0; $i<count($nodeObj->items); $i++) {
                $html .= $this->_nodeToHTML($nodeObj->items[$i], $return, $return . '_' . ($i + 1), $currentDepth + 1, $maxDepthPrefix);
            }
        }

        return $html;
    }
} // End class HTML_TreeMenu_DHTML


/**
* HTML_TreeMenu_Listbox class
*
* This class presents the menu as a listbox
*/
class HTML_TreeMenu_Listbox extends HTML_TreeMenu_Presentation
{
    /**
    * The text that is displayed in the first option
    * @var string
    */
    var $promoText;

    /**
    * The character used for indentation
    * @var string
    */
    var $indentChar;

    /**
    * How many of the indent chars to use
    * per indentation level
    * @var integer
    */
    var $indentNum;

    /**
    * Target for the links generated
    * @var string
    */
    var $linkTarget;

    /**
    * Constructor
    *
    * @param object $structure The menu structure
    * @param array  $options   Options whic affect the display of the listbox.
    *                          These can consist of:
    *                           o promoText  The text that appears at the the top of the listbox
    *                                        Defaults to "Select..."
    *                           o indentChar The character to use for indenting the nodes
    *                                        Defaults to "&nbsp;"
    *                           o indentNum  How many of the indentChars to use per indentation level
    *                                        Defaults to 2
    *                           o linkTarget Target for the links. Defaults to "_self"
    *                           o submitText Text for the submit button. Defaults to "Go"
    */
    function HTML_TreeMenu_Listbox($structure, $options = array())
    {
        $this->HTML_TreeMenu_Presentation($structure);

        $this->promoText  = 'Select...';
        $this->indentChar = '&nbsp;';
        $this->indentNum  = 2;
        $this->linkTarget = '_self';
        $this->submitText = 'Go';

        foreach ($options as $option => $value) {
            $this->$option = $value;
        }
    }

    /**
    * Returns the HTML generated
    */
    function toHTML()
    {
        static $count = 0;
        $nodeHTML = '';

        /**
        * Loop through subnodes
        */
        if (isset($this->menu->items)) {
            for ($i=0; $i<count($this->menu->items); $i++) {
                $nodeHTML .= $this->_nodeToHTML($this->menu->items[$i]);
            }
        }

        return sprintf('<form target="%s" action="" onsubmit="var link = this.%s.options[this.%s.selectedIndex].value; if (link) {this.action = link; return true} else return false"><select name="%s"><option value="">%s</option>%s</select> <input type="submit" value="%s" /></form>',
                       $this->linkTarget,
                       'HTML_TreeMenu_Listbox_' . ++$count,
                       'HTML_TreeMenu_Listbox_' . $count,
                       'HTML_TreeMenu_Listbox_' . $count,
                       $this->promoText,
                       $nodeHTML,
                       $this->submitText);
    }

    /**
    * Returns HTML for a single node
    *
    * @access private
    */
    function _nodeToHTML($node, $prefix = '')
    {
        $html = sprintf('<option value="%s">%s%s</option>', $node->link, $prefix, $node->text);

        /**
        * Loop through subnodes
        */
        if (isset($node->items)) {
            for ($i=0; $i<count($node->items); $i++) {
                $html .= $this->_nodeToHTML($node->items[$i], $prefix . str_repeat($this->indentChar, $this->indentNum));
            }
        }

        return $html;
    }
} // End class HTML_TreeMenu_Listbox
?>