widgets/data_list/DefaultGUIDataList.inc

<?php
/**
 *
 * This file contains the Default DataList child
 * that has its specific GUI layout/look/feel
 *
 * @author Walter A. Boring IV <waboring@buildabetterweb.com>
 * @package phpHtmlLib
 * 
 */

/**
 * Need to make sure we have the DataList object
 */
require_once($phphtmllib."/widgets/data_list/DataList.inc");

/**
 * This class is the Default phpHtmlLib GUI interface
 * child of the DataList class.  This child simply does
 * the job of rendering the html/layout for a DataList.
 * You can use this as an example of how to build your
 * own look/feel for your DataList.
 *
 * @author Walter A. Boring IV <waboring@buildabetterweb.com>
 * @package phpHtmlLib 
 *
 */
class DefaultGUIDatalist extends DataList {


    /**
     * The overall alignment 
     *
     * DEFAULT: "center"
     */
    var $_align = "center";

    /**
     * This holds the action column
     * settings if any.
     */
    var $_action_column = array();

    /**
     * holds the cntr for the action
     * checkbox name
     */
    var $_action_count = 0;

    /**
     * This array holds the list of
     * hidden checkbox[] items.
     *
     */
    var $_hidden_checkbox_items = array();

    /**
     * this array keeps track of the list
     * of rendered visible checkbox[]
     * items.  So we can not render the
     * hidden version of it.
     */
    var $_visible_checkbox_items = array();


    /**
     * This variable holds the array of default
     * selected items.  This is populated
     * inside the user_setup() function
     * to pre-populate the list of selected
     * items for a the checkbox action column.
     *
     */
    var $_default_checked_items = array();


    /**
     * Do we show action bar row?
     */
    var $_show_actionbar = TRUE;

    /**
    * This variable tells us whether to display select all checkbox
    */
    var $_allow_select_all = TRUE;


    /**
     * This function sets a prefix for all
     * variables that are used in the item list
     * table on a page.  This allows you to have
     * multiple itemlists on a single html page.
     *
     * @param string $prefix - the prefix for all vars.
     */
    function set_global_prefix($prefix) {
        $this->_vars["radioVar"] = "radio";
        $this->_vars["checkboxVar"] = "checkbox";
        DataList::set_global_prefix($prefix);
    }


        function gui_init() {
                $container = container();
                $container->add( $this->build_tool_link("first"),
                                                 $this->build_tool_link("prev"),
                                                 $this->build_tool_link("next"),
                                                 $this->build_tool_link("last"),
                                                 $this->build_tool_link("all"),
                                                 $this->get_page_info() );

                $this->_data_table = html_table($this->get_width(),0,0,0, $this->_align);
                $this->_data_table->set_class("datalist_border");

                $this->_tool_td = html_td("datalist_title", "right", $container);
        $this->_tool_td->set_style("padding-top: 5px; padding-right: 5px;");

        //calculate the # of columns depending on if they 
        //have added action columns.
        $cols = count($this->_columns);
        if ($this->_has_action_column("FIRST")) $cols++;
        if ($this->_has_action_column("LAST")) $cols++;

                //$this->_tool_td->set_tag_attribute("colspan", $cols-1);

        $title_table = html_table("100%");

                $title = new TDtag(array("align" => "left",
                                                                 "class" => "datalist_title",
                                                                 "style" => "padding-left: 5px;"),
                                                   $this->get_title() );

        $title_table->add( new TRtag( array(), $title, 
                                      $this->_tool_td) );


                //add the header tr reference
                //it will get populated later
                $this->_header_tr = new TRtag;
                //$this->_data_table->add( new TRtag(array(), $title, $this->_tool_td) );
        $this->_data_table->add_row( new TDtag(array("colspan" => $cols), 
                                           $title_table) );
                $this->_data_table->add_reference($this->_header_tr);

                //initialize the first date row
                $this->_data_row = new TRtag;
                               
                //enable search
                $this->search_enable();
                $this->set_simple_search_modifier();

        }

    /**
     * this function is used to set the overall alignment
     * of the widget
     *
     * @param string - the align value
     */
    function set_align($align) {
        $this->_align = $align;
    }

        function child_build_column_header($name, $col, $cnt) {
        if (!$this->_cur_col_cntr) {
            $this->_cur_col_cntr = 1;
            //lets see if we need to add an action column
            //as the first column.
            if ($this->_has_action_column("FIRST")) {
                //looks like we have a FIRST column actionbar
                //lets add it
                $td = $this->_build_action_column("FIRST", TRUE);
                $this->_header_tr->add( $td );
            }
            $td = $this->build_column_header($name, $col, $cnt);
            $this->_header_tr->add( $td );
        } else {
            $td = $this->build_column_header($name, $col, $cnt);
            $this->_header_tr->add( $td );
        }

        if ($this->_cur_col_cntr == $cnt) {
            //lets see if we need to add an action column
            //as the first column.
            if ($this->_has_action_column("LAST")) {
                //looks like we have a FIRST column actionbar
                //lets add it
                $td = $this->_build_action_column("LAST", TRUE);
                $this->_header_tr->add( $td );
            }
            unset( $this->_cur_col_cntr );
        } else {
            $this->_cur_col_cntr++;
        }        
        }

        function child_add_row_cell($obj, $col_name, $last_in_row_flag, $row_data) {
        if (!$this->_cur_col_cntr) {
            $this->_cur_col_cntr = 1;
            //lets see if we need to add an action column
            //as the first column.
            if ($this->_has_action_column("FIRST")) {
                //looks like we have a FIRST column actionbar
                //lets add it
                $this->_data_row->add($this->_build_action_column("FIRST", FALSE, $row_data));
            }
            $td = $this->wrap_column_item($obj, $col_name);
            $this->_data_row->add( $td );
        } else {
            //show the normal data 
            $td = $this->wrap_column_item($obj, $col_name);
            $this->_data_row->add( $td );
        }

                
                if ($last_in_row_flag) {
            //lets see if we need to add an action column
            //as the first column.
            if ($this->_has_action_column("LAST")) {
                //looks like we have a LAST column actionbar
                //lets add it
                $this->_data_row->add($this->_build_action_column("LAST", FALSE, $row_data));
            }


                        $this->_data_table->add_row( $this->_data_row );
                        $this->_data_row = new TRtag;
            unset( $this->_cur_col_cntr );
                } else {
            $this->_cur_col_cntr++;
        }
        }

        function child_get_gui() {
        return container( $this->_data_table,
                          $this->_build_actionbar() );
        }

    /**
     * This function builds the object/text
     * to be used for a column header. It can
     * either be an href because its sortable,
     * or it can just be text, because its not
     * sortable.
     *
     * @param string $col_name - the column name
     *                           to build from
     *                           the headers.
     * @param array $col_data - the column's data.
     * @param int the column # we are working on.
     * @return mixed - either an Atag object or
     *                 raw text.
     */
    function build_column_header($col_name, $col_data, $col_num) {

        $td = new TDtag(array("class"=>"datalist_col_head",
                              "width" => $col_data["size"]));

        if ($this->_columns[$col_name]["sortable"]) {
            $col_url = $this->build_column_url($col_name);

            $td->set_tag_attribute("title","Sort By ".$col_name);

            $td->push(html_a($col_url, $col_name,"form_link"));

            if ($this->_columns[$col_name]["data_name"] == $this->orderby()) {

                if ($this->reverseorder() == "false") {
                                        $alt_title = "Sorted in Ascending Order";
                    $img = html_img($this->get_image_path()."/picto_down.gif",11,11,'',$alt_title);
                    $img->set_tag_attribute("style", "padding-left: 5px;margin-left:5px;vertical-align:middle;");
                    $td->push($img);
                } else {
                                        $alt_title = "Sorted in Descending Order";
                    $img = html_img($this->get_image_path()."/picto_up.gif",11,11,'',$alt_title);
                    $img->set_tag_attribute("style", "padding-left: 5px;margin-left:5px;vertical-align:middle;");
                    $td->push($img);
                }
            }

            // we want to highlight the td on mouse over
            $td->set_tag_attribute("onMouseOver",
                                   "javascript:style.cursor='hand';this.className='datalist_col_head_hover';");
            $td->set_tag_attribute("onMouseOut",
                                   "javascript:this.className='datalist_col_head'");
            $td->set_tag_attribute("onMouseDown",
                                   "javascript:this.className='datalist_col_head_clicked'");


            if ($this->get_form_method() == "POST") {
                $td->set_tag_attribute("onClick", $col_url);
            }
            else {
                $td->set_tag_attribute("onClick", "javascript:document.location='".$col_url."';");
            }
        } else {
            $td->push($col_name);
            $td->set_tag_attribute("style", $style."padding-left:5px;padding-right:5px;white-space:nowrap;");
        }

        return $td;
    }

    /**
     * This function ensures that the data we place
     * in a column is aligned according to what the
     * user wants.
     *
     * @param mixed - $obj - the data for the td.
     * @param string - $col_name - the name of the column header
     *                             for this row to render.
     * @param int - $odd_row - tells us if this cell lives in
     *                         an odd # row (for alternating row colors)
     * @param int - the column # we are working on.
     * @return TDtag object
     */
    function wrap_column_item($obj, $col_name) {

        //make sure its set to something.
        if ($obj == '') {
            $obj = "&nbsp;";
        }
        // if item is match by expression we will replace it with an link object  
        elseif($this->_decode_column_item_expr($obj)) {  
          $obj = $this->_decode_column_item_expr($obj);  
        }  
        // if item is an Array we will replace it with an selection form object  
        elseif($this->_decode_column_item_array($obj)) {
          $obj = $this->_decode_column_item_array($obj);  
        }  
 
        //make sure we don't put a right border on the last
        //column we are working on.
        //$style = "padding-left: 3px;padding-right:3px;border-top: 1px solid #dddddd;";
        

                if ($this->_columns[$col_name]["data_name"] == $this->orderby()) {
            $style = "background-color: #f4f4f4;";
        } else {
                        $style = "background-color: #ffffff;";
                }

        $align = $this->_columns[$col_name]["align"];
        $td = new TDtag(array("align" => $align,
                              "style" => $style,
                                                          "class" => "datalist_data_cell"));

        if (is_object($obj) && $obj->_tag == "td") {
                        return $obj;
                } else {
                        $td->add( $obj );
                }
        return $td;
    }

    /**
     * This builds the table that holds the search
     * capability.
     *
     * @return TABLEtag object.
     */
    function child_build_search_table() {
        //the search capability is enabled.
        //lets try and build the table.
        $td_attributes = array("style" => "padding-left: 5px;padding-bottom:4px;".
                                                                                  "padding-right:40px;padding-top:4px;".
                                                                                  "background-color: #eeeeee;",
                               "align" => "left",
                               "class" => "font10");

        $table = html_table($this->get_width(),0,0,0,$this->_align);

        //test to see if they want to render the outer borders
        $table->set_tag_attribute("style", "border-left: 1px solid #a1a1a1;".
                                                                           "border-right: 1px solid #a1a1a1;");

        $td = new TDtag($td_attributes);

        if ($this->search_type() == "advanced") {
            $td->push($this->_build_advanced_search_form());
        } else {
            $td->push($this->_build_simple_search_form());
        }
        $table->push_row($td);

        return container($this->_build_search_title(), $table);
    }

    /**
     * This function builds the search title table
     *
     * @return TABLEtag object
     */
    function _build_search_title() {
        //build the title stacked table
        $title = html_table($this->get_width(), 0, 0, 0, $this->_align);

        //test to see if they want to render the outer borders
        $title->set_tag_attribute("style","border: 1px solid #a1a1a1;");
        $title->push_row(new TDtag(array("class" => "datalist_title",
                                                                                 "style" => "color: ".$this->_title_fcolor.";".
                                                                                            "background-color: ".$this->_title_color.";"), "&nbsp;Search"));

        return $title;
    }


    /**
     * This function builds the simple search TD
     *
     * @return ContainerWidget
     */
    function _build_simple_search_form() {

        //if there is only 1 item enabled for search
        //then the search looks simple.
        $fields = $this->_get_searchable_fields();
        $cnt = count($fields);
        if ($cnt == 0) {
            return NULL;
        }

        $container = new ContainerWidget;

        if ($cnt == 1) {
            //user only has 1 field to show.
            list($name, $field) = each($fields);
            $container->push("Find ".$name."&nbsp;&nbsp;");
        } else {
            //user has many fields to show.
            $container->push("Find ",
                             form_select($this->_vars["search_fieldVar"], $fields, $this->search_field()));
        }

        if ($this->get_simple_search_modifier()) {
            //the user wants the search modifier turned on.
            $container->push($this->_build_simple_search_modifier());
        }

        $container->push(form_text($this->_vars["search_valueVar"], $this->search_value_filter($this->search_value()), "20", "100", array("style"=>"vertical-align:middle;")),
                         form_submit($this->get_form_name(), "Search", array("style"=>"vertical-align:middle;")));

        if ($this->is_advanced_search_enabled()) {
            $span = html_span(html_a("ass","Advanced Search", "title"));
            $container->push("&nbsp;", $span);
        }

        if ($cnt == 1) {
            $container->push(form_hidden($this->_vars["search_fieldVar"], $field));
        }

        $hidden_fields = $this->get_hidden_fields();
        if(is_array($hidden_fields)) {  
          foreach($hidden_fields as $key => $value) {  
            $container->push(form_hidden($key, $value));  
          }
        }
        $container->push(form_close() );
        return $container;
    }


    /**
     * This function adds an action column.  This
     * adds a column of either checkboxes or radio
     * buttons.
     *
     * @param string - type of column
     *                 'checkbox' or 'radio'
     * @param string - which column it lives in
     *                 'FIRST' or 'LAST'
     * @param string - which db field is associated
     *                 with this.
     * @param string - the title to use for the column.
     *                 NOTE: if this is set, then there
     *                       will NOT be a global checkbox
     *                       that can be used to select/deslect
     *                       all at once.
     *
     */
    function add_action_column($type, $col, $db_field, $title=NULL) {
        $action = array("type" => $type,
                        "dbfield" => $db_field,
                        "title" => $title);
        $this->_action_column[$col] = $action;
    }

    /**
     * This function is used to set the default list
     * of selected checkbox items.  This is used so
     * the user can pre-populate the list of
     * checked items in the checkbox action column
     *
     * @param array - the array of checked items
     */
    function set_default_checked_items($items) {
        $this->_default_checked_items = $items;
    }

    /**
     * This function returns the array of default
     * checked items to be marked as checked in
     * the checkbox action column
     *
     * @return array
     */
    function get_default_checked_items() {
        return $this->_default_checked_items;
    }

    /**
     * set the flag to tell the object to
     * save the checked items
     *
     */
    function save_checked_items() {
        $this->_save_checked_items_flag = TRUE;
    }

    /**
     * This tests the object flag to
     * see if the child class wants to
     * automatically save the checked
     * items
     *
     * @return boolean
     */
    function _save_checked_items_enabled() {
        return $this->_save_checked_items_flag;
    }

    /**
     * This function tests to see if the child
     * wants to render an action column
     *
     * @param string - the column to test for
     *                 FIRST or LAST
     * @return boolean
     */
    function _has_action_column($col) {
        if (isset($this->_action_column[$col])) {
            return TRUE;
        }
        else {
            return FALSE;
        }
    }

    /**
     * This allows the caller to
     * turn on/off the rendering of
     * the bottom action bar row
     *
     * @param boolean - TRUE = on FALSE = off
     */
    function set_actionbar($flag = TRUE) {
        $this->_show_actionbar = $flag;
    }

    /**
     * This function gets the current value
     * of the show actionbar flag setting.
     *
     * @return boolean
     */
    function show_actionbar() {
        return $this->_show_actionbar;
    }

    /**
    * Sets the flag for rendering the select all checkbox
    *
    * @param bool flag
    */
    function allow_select_all($flag) {
        $this->_allow_select_all = $flag;
    }


    /**
     * This builds an action column cell
     *
     * @param string - the column to test for
     *                 FIRST or LAST
     * @param boolean - lets us know this is for
     *                  the header or a cell.
     * @param array   - the row's data.
     * @return HTMLTag object
     */
    function _build_action_column($col, $header_flag=FALSE, $row_data=NULL) {

        $attributes = array("width" => "1%",
                            "align" => "center");

        if ($header_flag) $attributes["class"] = "datalist_col_head";
        else $attributes["class"] = "datalist_actionbar_data_cell";

        $td = new TDtag($attributes);
        $form_value = '';
        if ($header_flag) {
            //this is for a header item.
            $form_value = "";
        } else {
            $form_value = $row_data[$this->_action_column[$col]["dbfield"]];
        }

        switch ($this->_action_column[$col]["type"]) {
        case "radio":
            if ($header_flag) {
                //we don't put a header button for radio
                if ($this->_action_column[$col]["title"])
                    $obj = $this->_action_column[$col]["title"];
                else $obj = _HTML_SPACE;
            } else {
                $name = $this->_vars["radioVar"]."[".$this->_action_count."]";
                $obj = form_radio($name, $form_value);

                //see if the checkbox should be disabled
                if (!$this->is_action_enabled($form_value, $row_data)) {
                    $obj->set_tag_attribute("DISABLED");
                    $obj->set_tag_attribute("value","");
                }
            }

            break;
        case "checkbox":
            if ($header_flag) {
                //see if the child wants a title instead
                //of the global check/uncheck checkbox
                if ($this->_action_column[$col]["title"]) {
                    $obj = $this->_action_column[$col]["title"];
                    break;
                } else {
                    $name = $this->_vars["checkboxVar"];
                }
            } else {
                $name = $this->_vars["checkboxVar"]."[".$this->_action_count."]";
            }

            $this->_action_count++;
            $obj = form_checkbox($name, $form_value);
            if ($header_flag) {
                if ($this->_allow_select_all) {
                    $obj->set_tag_attribute("onClick", "javascript:mass(this.form)");
                } else {
                    $obj = _HTML_SPACE;
                }
            }

            //see if the checkbox should be checked
            if ($this->_is_col_checked($form_value, $row_data)) {
                $obj->set_tag_attribute("CHECKED");
            }

            //see if the checkbox should be disabled
            if (!$header_flag && !$this->is_action_enabled($form_value, $row_data)) {
                $obj->set_tag_attribute("DISABLED");
                $obj->set_tag_attribute("value","");
            }

            //save which items we have rendered visibly.
            //so we can filter those out in the hidden
            //items
            $this->_visible_checkbox_items[$form_value] = TRUE;;
            break;
        }
        $td->push($obj);
        $td->set_collapse();
        return $td;
    }

    /**
     * This method checks to see if a
     * particular row has been checked
     * in the action column
     *
     * @param string - the item to look for
     * @param array   - the row's data.
     * @return boolean.
     */
    function _is_col_checked($value, $row_data) {
        if (count($this->_hidden_checkbox_items) == 0) {
            if (isset($_REQUEST[$this->_vars["checkboxVar"]]) && is_array($_REQUEST[$this->_vars["checkboxVar"]])) {
                $this->_hidden_checkbox_items = array_flip($_REQUEST[$this->_vars["checkboxVar"]]);
            }
        }

        //call the child function to see if item should
        //be checked
        $user_flag = $this->is_action_checked($value, $row_data);
        $hidden_flag = isset($this->_hidden_checkbox_items[$value]);

        return($user_flag || $hidden_flag);

        if (isset($this->_hidden_checkbox_items[$value])) {
            return TRUE;
        }
        else {
            return FALSE;
        }
    }

    /**
     * This function is provided to give the child class
     * the ability to precheck/select a particular
     * column.
     *
     * @param string - the item to look for.
     * @param array   - the row's data.
     * @return boolean
     */
    function is_action_checked($value, $row_data) {
        return FALSE;
    }

    /**
     * This function is provided to give the child
     * class the ability to enable/disable a particular
     * checkbox.
     *
     * @param string - the item to look for.
     * @param array   - the row's data.
     * @return boolean
     */
    function is_action_enabled($value, $row_data) {
        return TRUE;
    }

    /**
     * This function renders the action bar at the bottom
     * of the data list.
     *
     * @return TABLEtag object
     */
    function _build_actionbar() {

        if ($this->show_actionbar()) {

            $table = html_table($this->get_width(),0,0,0,$this->_align);
            $table->set_class("datalist_actionbar");
            /*if ($this->show_outer_border()) {
                $table->set_tag_attribute("style", _CSS_BORDER_LEFT.
                                          _CSS_BORDER_RIGHT.
                                          _CSS_BORDER_BOTTOM);
            }
            else {
                $table->set_tag_attribute("style", _CSS_BORDER_TOP);
            }*/

                        $td = new TDtag(array("class"=>"datalist_bottom_seperator",
                                                                  "colspan" => 3),
                                                        _HTML_SPACE);
                        $table->add_row( $td );

            $table->add_row($this->_build_actionbar_arrow_cell("FIRST"),
                            $this->_build_actionbar_data_cell(),
                            $this->_build_actionbar_arrow_cell("LAST") );

            return $table;
        }
        else return NULL;
    }

    /**
     * This function builds a TD with the
     * appropriate action arrow.
     *
     * @param string - FIRST or LAST
     * @return TDtag
     */
    function _build_actionbar_arrow_cell($col) {
        $td = new TDtag(array("class" => "datalist_title",
                              "style" => "padding-left:14px;padding-right:14px;".
                              "padding-top:5px;",
                              "width" => "5%")
                       );

        if ($col == "FIRST") {
            $td->set_tag_attribute("align", "left");
            if ($this->_has_action_column("FIRST") && 
                $this->_datasource->get_total_rows()) {
                $td->push(html_img("/phphtmllib/images/widgets/arrow_right.gif"));
            }
            else {
                $td->push("&nbsp;");
            }
        }
        else {
            $td->set_tag_attribute("align", "right");
            if ($this->_has_action_column("LAST") && 
                $this->_datasource->get_total_rows()) {
                $td->push(html_img("/phphtmllib/images/widgets/arrow_left.gif"));
            }
            else {
                $td->push("&nbsp;");
            }
        }
        return $td;
    }

    /**
     * This function builds the user's data cell
     *
     * @return TDtag;
     */
    function _build_actionbar_data_cell() {
        $td = new TDtag(array("class" => "datalist_title",
                              "style" => "padding-left:5px;padding-right:5px;".
                              "padding-top:5px;padding-bottom:5px")
                       );

        $flag = FALSE;
        if ($this->_has_action_column("FIRST")) {
            $flag = TRUE;
            $td->set_tag_attribute("align", "left");
        }
        else if ($this->_has_action_column("LAST")) {
            $flag = TRUE;
            $td->set_tag_attribute("align", "right");
        }

        if ($flag && $this->_datasource->get_total_rows()) {
            $td->push($this->actionbar_cell());
        }
        else {
            $td->push("&nbsp;");
        }

        return $td;
    }

    /**
     * this is the method that builds
     * the contents for the middle actionbar
     * td cell.
     * NOTE this function is meant to be overriden
     *      by the child class.
     *
     * @return ContainerWidget object
     */
    function actionbar_cell() {
        return _HTML_SPACE;
    }

    /**
     * This function builds an action button that will
     * modify the form action, to post to a different
     * script to handle the data
     *
     * @param string - the button name
     * @param string - the script that gets called.
     * @return INPUTtag object
     */
    function action_button($name, $action) {

        $submit = form_button("_action", $name);

        // here we make sure that all standard buttons look the same
        if (strlen($name)<10) $submit->set_tag_attribute("style","width: 80px;");

        $form_name = $this->get_form_name();

        $onclick  = "javascript: document.".$form_name.".action='".$action."';";
        $onclick .= "document.".$form_name.".submit();";
        $submit->set_tag_attribute("onclick", $onclick);
        return $submit;
    }

    /**
     * This function returns any Javascript required
     * for this widget
     *
     * @return mixed
     */
    function _javascript() {
        if ($this->_has_action_column("FIRST") || $this->_has_action_column("LAST")) {
            $last = $this->_action_column["LAST"]["type"];
            $first = $this->_action_column["FIRST"]["type"];
            if ($last == "checkbox" || $first == "checkbox") {
                return $this->_checkbox_javascript();
            }
        }
        else {
            return NULL;
        }
    }

    /**
     * This function builds the JS needed for the checkbox
     * action column
     *
     * @return SCRIPTtag
     */
    function _checkbox_javascript() {
        $script = new SCRIPTtag(array("language" => "Javascript"));

        $var_name = $this->_vars["checkboxVar"];

        $js  = "function mass(form) {\n";
        $js .= "  var i=0;\n";
        $js .= "  var value=0;\n\n";
        $js .= "  if (form.$var_name.checked) {\n";
        $js .= "    value=1;\n";
        $js .= "  } else {\n";
        $js .= "    value=0;\n";
        $js .= "  }\n\n";
        $js .= "  for (i = 0; i < form.length; i++) {\n";
        $js .= "    if (form.elements[i].name.substring(0, 8) == '$var_name' && !form.elements[i].disabled) {\n";
        $js .= "      form.elements[i].checked = value;\n";
        $js .= "    }\n";
        $js .= "  }\n";
        $js .= "}\n";

        $script->push($js);
        return $script;
    }

    function get_hidden_fields() { 
         user_error("DefaulGUIDataList::get_hidden_fields() - ".
                           "child class must override this method ".
                           "this function should return a hash for hidden fields, if not needed just return" );
    }

    function _decode_column_item_array($obj) {
         user_error("DefaulGUIDataList::_decode_column_item_array() - ".
                           "child class must override this method ".
                           "this function should decode the column_item if it is a (sub-) array,".
                           "array should e.g. replaced by a select form." );
    }
   
    function _decode_column_item_expr($obj) {
         user_error("DefaulGUIDataList::_decode_column_item_expr() - ".
                           "child class must override this method ".
                           "this function should decode the column_item, if it is encoded for e.g. objects" );
    }
}

/**
 * This class defines the css used by the 
 * FooterNav Object.
 *
 * @author Walter A. Boring IV <waboring@buildabetterweb.com>
 * @package phpHtmlLib 
 */
class DefaultGUIDataListCSS extends CSSBuilder {

        function user_setup() {
                $this->add_entry(".datalist_col_head", "",
                                                 array("font-family" => "arial, helvetica, sans-serif",
                                                           "font-size" => "10pt",
                                                           "font-weight" => "bold",
                                                           "color" => "#000000",
                                                           "background-color" => "#CCCCCC",
                                                           "text-align" => "left",
                                                           "white-space" => "nowrap",
                                                           "height" => "20px",
                                                           "vertical-align" => "middle",
                                                           "border-left" => "1px solid white",
                                                           "border-top" => "1px solid white",
                                                           "border-right" => "1px solid gray",
                                                           "border-bottom" => "1px solid gray",
                                                           "padding-left" => "3px",
                                                           "padding-right" => "3px") );

                $this->add_entry(".datalist_col_head", "a.form_link:active,a.form_link:visited,a.form_link:link",
                                                 array("color" => "#000000",
                               "font-family" => "arial, helvetica, sans-serif",
                               "font-size" => "10pt",
                               "font-weight" => "bold",
                                                           "text-decoration" => "none"));

                $this->add_entry(".datalist_col_head_hover", "",
                                                 array("font-family" => "arial, helvetica, sans-serif",
                                                           "font-size" => "10pt",
                                                           "font-weight" => "bold",
                                                           "color" => "#000000",
                                                           "background-color" => "#dcdcdc",
                                                           "text-align" => "left",
                                                           "white-space" => "nowrap",
                                                           "height" => "20px",
                                                           "vertical-align" => "middle",
                                                           "border-left" => "1px solid white",
                                                           "border-top" => "1px solid white",
                                                           "border-right" => "1px solid gray",
                                                           "border-bottom" => "1px solid gray",
                                                           "padding-left" => "3px",
                                                           "padding-right" => "3px") );

                $this->add_entry(".datalist_col_head_clicked", "",
                                                 array("font-family" => "arial, helvetica, sans-serif",
                                                           "font-size" => "10pt",
                                                           "font-weight" => "bold",
                                                           "color" => "#000000",
                                                           "background-color" => "#dddddd",
                                                           "text-align" => "left",
                                                           "white-space" => "nowrap",
                                                           "height" => "20px",
                                                           "vertical-align" => "middle",
                                                           "border-left" => "1px solid white",
                                                           "border-top" => "1px solid white",
                                                           "border-right" => "1px solid gray",
                                                           "border-bottom" => "1px solid gray",
                                                           "padding-left" => "3px",
                                                           "padding-right" => "3px") );

                $this->add_entry( ".datalist_border", "",
                                                  array("border" => "1px solid #999999"));

                $this->add_entry( ".datalist_title", "",
                                                  array("font-family" => "arial",
                                                                "font-size" => "10pt",
                                                                "font-weight" => "bold",
                                                                "color" => "#FFFFFF",
                                                                "background-color" => "#999999",
                                                                "white-space" =>"nowrap"));

        $this->add_entry( ".datalist_data_cell", "",
                          array(
                              "font-family" => "arial",
                              "font-size" => "10pt",
                              "padding-left" => "3px",
                              "padding-right" => "3px",
                              "border-top" => "1px solid #dddddd"));

        $this->add_entry( ".datalist_actionbar", "", 
                          array(
                              "border" => "1px solid #999999") );

        $this->add_entry( ".datalist_actionbar_data_cell", "",
                          array(
                              "font-family" => "arial",
                              "font-size" => "10pt",
                              "background" => "#CCCCCC",
                              "padding-left" => "3px",
                              "padding-right" => "3px",
                              "border-top" => "1px solid #dddddd"));

        $this->add_entry( ".datalist_bottom_seperator", "",
                          array(
                              "font-size" => "5px",
                              "line-height" =>  "5px",
                              "background" => "#CCCCCC",
                              "text-align" => "left",
                              "white-space" => "nowrap",
                              "height" => "5px",
                              "border-left" => "1px solid #FFFFFF",
                              "border-top" => "1px solid #FFFFFF",
                              "border-right" => "1px solid #dddddd",
                              "border-bottom" => "1px solid #dddddd",
                              "padding-left" =>  "3px",
                              "padding-right" => "3px"));
        }       
}
?>
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