<?php
/**
* Progress Bar
*
* @package Nc
*/
class NcProgressBar extends NcWindow {
	/**
	* @var float Maximum value
	*/
	var $max;
	/**
	* @var float Current value
	*/
	var $value;
	/**
	* @var boolean Show percentage
	*/
	var $show_pct;
	
	/**
	* Constructor
	*
	* Creates a new progress bar widget
	*
	* @param NcWindow $parent Parent window
	* @param integer $width Width
	* @param integer $y Row
	* @param integer $x Column
	* @param float $max Maximum value
	* @param boolean $show_pct Display the percentage alongside the progress bar
	*/
	public function __construct( &$parent, $width, $y, $x, $max = 100, $show_pct = true ) {
		parent::__construct( $parent, 1, $width, $y, $x, false );
		$this->enabled = false; // Cannot accept focus
		$this->max = $max;
		$this->show_pct = $show_pct;
		$this->pos( 0 );
	}
	/**
	* Set or get the current value
	*
	* @param float $value New value
	* @return float Current value
	*/
	public function pos( $value = false ) {
		if( $value === false ) {
			return $this->value;
		} else {
			$value = $value > $this->max ? $this->max : $value;
			$this->value = $value;
			$this->write( 0, 0, '[', false );
			$width = $this->width - ( $this->show_pct ? 7 : 2 );
			$width = $width >= 0 ? $width : 0;
			$complete = floor( $width * $value / $this->max );
			$this->write( 0, 1, str_repeat( '#', $complete ), false );
			$this->write( 0, 1 + $complete, str_repeat( ' ', $width - $complete ), false );
			$this->write( 0, $width + 1, ']', false );
			if( $this->show_pct ) {
				$this->write( 0, $width + 3, sprintf( '%3d%%', floor( $value / $this->max * 100 ) ), false );
			}
			ncurses_update_panels();
			ncurses_doupdate();
		}
	}
	/**
	* Get or set maximum value
	*
	* @param float $value New maximum
	* @return float Current maximum
	*/
	public function max( $value = false ) {
		if( $value === false ) {
			return $this->max;
		} else {
			$this->max = $value > 0 ? $value : $this->max;
			$this->pos( $this->value );
		}
	}
}
?>