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File: GridColumn.inc.php
<?php

/**
 * @file classes/controllers/grid/GridColumn.inc.php
 *
 * Copyright (c) 2014-2021 Simon Fraser University
 * Copyright (c) 2000-2021 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class GridColumn
 * @ingroup controllers_grid
 *
 * @brief The GridColumn class represents a column within a grid. It is used to
 *  format the data presented in a particular column, which is provided by the
 *  GridRow implementation, and to handle user operations on that column (such
 *  as clicking a checkbox).
 *
 * For general information on grids, see GridHandler.
 */

define('COLUMN_ALIGNMENT_LEFT', 'left');
define('COLUMN_ALIGNMENT_CENTER', 'center');
define('COLUMN_ALIGNMENT_RIGHT', 'right');

import('lib.pkp.classes.controllers.grid.GridBodyElement');

class GridColumn extends GridBodyElement {
	/** @var string the column title i18n key */
	var $_title;

	/** @var string the column title (translated) */
	var $_titleTranslated;

	/** @var string the controller template for the cells in this column */
	var $_template;

	/**
	 * Constructor
	 * @param $id string Grid column identifier
	 * @param $title string Locale key for grid column title
	 * @param $titleTranslated string Optional translated grid title
	 * @param $template string Optional template filename for grid column, including path
	 * @param $cellProvider GridCellProvider Optional grid cell provider for this column
	 * @param $flags array Optional set of flags for this grid column
	 */
	function __construct($id = '', $title = null, $titleTranslated = null,
			$template = null, $cellProvider = null, $flags = array()) {

		// Use default template if none specified
		if ($template === null) $template = 'controllers/grid/gridCell.tpl';

		parent::__construct($id, $cellProvider, $flags);

		$this->_title = $title;
		$this->_titleTranslated = $titleTranslated;
		$this->_template = $template;
	}

	//
	// Setters/Getters
	//
	/**
	 * Get the column title
	 * @return string
	 */
	function getTitle() {
		return $this->_title;
	}

	/**
	 * Set the column title (already translated)
	 * @param $title string
	 */
	function setTitle($title) {
		$this->_title = $title;
	}

	/**
	 * Set the column title (already translated)
	 * @param $title string
	 */
	function setTitleTranslated($titleTranslated) {
		$this->_titleTranslated = $titleTranslated;
	}

	/**
	 * Get the translated column title
	 * @return string
	 */
	function getLocalizedTitle() {
		if ( $this->_titleTranslated ) return $this->_titleTranslated;
		return __($this->_title);
	}

	/**
	 * get the column's cell template
	 * @return string
	 */
	function getTemplate() {
		return $this->_template;
	}

	/**
	 * set the column's cell template
	 * @param $template string
	 */
	function setTemplate($template) {
		$this->_template = $template;
	}

	/**
	 * @see GridBodyElement::getCellProvider()
	 */
	function getCellProvider() {
		if (is_null(parent::getCellProvider())) {
			// provide a sensible default cell provider
			import('lib.pkp.classes.controllers.grid.ArrayGridCellProvider');
			$cellProvider = new ArrayGridCellProvider();
			$this->setCellProvider($cellProvider);
		}

		return parent::getCellProvider();
	}

	/**
	 * Get cell actions for this column.
	 *
	 * NB: Subclasses have to override this method to
	 * actually provide cell-specific actions. The default
	 * implementation returns an empty array.
	 *
	 * @param $row GridRow The row for which actions are
	 *  being requested.
	 * @return array An array of LinkActions for the cell.
	 */
	function getCellActions($request, $row, $position = GRID_ACTION_POSITION_DEFAULT) {
		// The default implementation returns an empty array
		return array();
	}
}