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

<?php

class y_axis_base
{
        function y_axis_base(){}
        
        /**
         * @param $s as integer, thickness of the Y axis line
         */
        function set_stroke( $s )
        {
                $this->stroke = $s;
        }
        
        /**
         * @param $val as integer. The length of the ticks in pixels
         */
        function set_tick_length( $val )
        {
                $tmp = 'tick-length';
                $this->$tmp = $val;
        }
        
        function set_colours( $colour, $grid_colour )
        {
                $this->set_colour( $colour );
                $this->set_grid_colour( $grid_colour );
        }
        
        function set_colour( $colour )
        {
                $this->colour = $colour;
        }
        
        function set_grid_colour( $colour )
        {
                $tmp = 'grid-colour';
                $this->$tmp = $colour;
        }
        
        /**
         * Set min and max values, also (optionally) set the steps value.
         * You can reverse the chart by setting min larger than max, e.g. min = 10
         * and max = 0.
         * 
         * @param $min as integer
         * @param $max as integer
         * @param $steps as integer.
         */
        function set_range( $min, $max, $steps=1 )
        {
                $this->min = $min;
                $this->max = $max;
                $this->set_steps( $steps );
        }
        
        /**
         * Sugar for set_range
         */
        function range( $min, $max, $steps=1 )
        {
                $this->set_range( $min, $max, $steps );
                return $this;
        }
        
        /**
         * @param $off as Boolean. If true the Y axis is nudged up half a step.
         */
        function set_offset( $off )
        {
                $this->offset = $off?1:0;
        }
        
        /**
         * @param $y_axis_labels as an y_axis_labels object
         * Use this to customize the labels (colour, font, etc...)
         */
        function set_labels( $y_axis_labels )
        {
                $this->labels = $y_axis_labels;
        }
        
        /**
         * Pass in some text for each label. This can contain magic variables "#val#" which
         * will get replaced with the value for that Y axis label. Useful for:
         * - "£#val#"
         * - "#val#%"
         * - "#val# million"
         * 
         * @param $text as string.
         */
        function set_label_text( $text )
        {
                $tmp = new y_axis_labels();
                $tmp->set_text( $text );
                $this->labels = $tmp;
        }
        
        /**
         * @param $steps as integer.
         *
         * Only show every $steps label, e.g. every 10th
         */
        function set_steps( $steps )
        {
                $this->steps = $steps;  
        }
        
        /**
         * Make the labels show vertical
         */
        function set_vertical()
        {
                $this->rotate = "vertical";
        }
}