source: code/Website/php-ofc-library/ofc_bar_base.php

<?php

/* this is a base class */

class bar_base
{
        function bar_base(){}

        /**
         * @param $text as string the key text
         * @param $size as integer, size in pixels
         */
        function set_key( $text, $size )
        {
                $this->text = $text;
                $tmp = 'font-size';
                $this->$tmp = $size;
        }
        
        /**
         * syntatical sugar.
         */
        function key( $text, $size )
        {
                $this->set_key( $text, $size );
        }

        /**
         * @param $v as an array, a mix of:
         *      - a bar_value class. You can use this to customise the paramters of each bar.
         *      - integer. This is the Y position of the top of the bar.
         */
        function set_values( $v )
        {
                $this->values = $v;             
        }
        
        /**
         * see set_values
         */
        function append_value( $v )
        {
                $this->values[] = $v;           
        }
        
        /**
         * @param $colour as string, a HEX colour, e.g. '#ff0000' red
         */
        function set_colour( $colour )
        {
                $this->colour = $colour;        
        }
        
        /**
         *syntatical sugar
         */
        function colour( $colour )
        {
                $this->set_colour( $colour );
        }

        /**
         * @param $alpha as real number (range 0 to 1), e.g. 0.5 is half transparent
         */
        function set_alpha( $alpha )
        {
                $this->alpha = $alpha;  
        }
        
        /**
         * @param $tip as string, the tip to show. May contain various magic variables.
         */
        function set_tooltip( $tip )
        {
                $this->tip = $tip;      
        }
        
        /**
         *@param $on_show as line_on_show object
         */
        function set_on_show($on_show)
        {
                $this->{'on-show'} = $on_show;
        }
        
        function set_on_click( $text )
        {
                $tmp = 'on-click';
                $this->$tmp = $text;
        }
        
        function attach_to_right_y_axis()
        {
                $this->axis = 'right';
        }
}