edit_form.php

<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * @package block_dataform_view
 * @copyright 2013 Itamar Tzadok
 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

class block_dataform_view_edit_form extends block_edit_form {

    protected function specific_definition($mform) {
        global $DB, $SITE, $CFG, $PAGE;

        // Buttons.
        // -------------------------------------------------------------------------------
        $this->add_action_buttons();

        // Header.
        // --------------------------------------------------------------
        $mform->addElement('header', 'configheader', get_string('blocksettings', 'block'));

        // Title.
        $mform->addElement('text', 'config_title', get_string('title', 'block_dataform_view'));
        $mform->setDefault('config_title', get_string('pluginname', 'block_dataform_view'));
        $mform->setType('config_title', PARAM_MULTILANG);

        // Get all Dataforms where user has managetemplate capability.
        if ($dataforms = $DB->get_records('dataform')) {
            foreach ($dataforms as $dataformid => $dataform) {
                $df = mod_dataform_dataform::instance($dataformid);
                // Remove if user cannot manage.
                if (!has_capability('mod/dataform:managetemplates', $df->context)) {
                    unset($dataforms[$dataformid]);
                    continue;
                }
                $dataforms[$dataformid] = $df;
            }
        }

        // Dataforms menu.
        if ($dataforms) {
            $dfmenu = array('' => array(0 => get_string('choosedots')));
            foreach ($dataforms as $dfid => $df) {
                if (!isset($dfmenu[$df->course->shortname])) {
                    $dfmenu[$df->course->shortname] = array();
                }
                $dfmenu[$df->course->shortname][$dfid] = strip_tags(format_string($df->name, true));
            }
        } else {
            $dfmenu = array('' => array(0 => get_string('nodataforms', 'block_dataform_view')));
        }
        $mform->addElement('selectgroups', 'config_dataform', get_string('selectdataform', 'block_dataform_view'), $dfmenu);

        // Views menu.
        $options = array(0 => get_string('choosedots'));
        $mform->addElement('select', "config_view", get_string('selectview', 'block_dataform_view'), $options);
        $mform->disabledIf("config_view", "config_dataform", 'eq', 0);

        // Filters menu.
        $options = array(0 => get_string('choosedots'));
        $mform->addElement('select', "config_filter", get_string('selectfilter', 'block_dataform_view'), $options);
        $mform->disabledIf("config_filter", "config_dataform", 'eq', 0);

        // Embed.
        $mform->addElement('selectyesno', "config_embed", get_string('embed', 'dataform'));

        // Container style.
        $mform->addElement('text', 'config_style', get_string('style', 'block_dataform_view'), array('size' => '64'));
        $mform->setType('config_style', PARAM_TEXT);
        $mform->disabledIf("config_style", "config_embed", 'eq', 0);
    }

    /**
     *
     */
    public function definition_after_data() {
        global $DB;

        if ($selectedarr = $this->_form->getElement('config_dataform')->getSelected()) {
            $dataformid = reset($selectedarr);
        } else {
            $dataformid = 0;
        }

        if ($selectedarr = $this->_form->getElement('config_view')->getSelected()) {
            $viewid = reset($selectedarr);
        } else {
            $viewid = 0;
        }

        if ($dataformid) {
            if ($views = $DB->get_records_menu('dataform_views', array('dataid' => $dataformid), 'name', 'id,name')) {
                $configview = &$this->_form->getElement('config_view');
                foreach ($views as $key => $value) {
                    $configview->addOption(strip_tags(format_string($value, true)), $key);
                }

                if ($filters = $DB->get_records_menu('dataform_filters', array('dataid' => $dataformid), 'name', 'id,name')) {
                    $configfilter = &$this->_form->getElement('config_filter');
                    foreach ($filters as $key => $value) {
                        $configfilter->addOption(strip_tags(format_string($value, true)), $key);
                    }
                }
            }
        }
    }

    /**
     *
     */
    public function validation($data, $files) {
        $errors = parent::validation($data, $files);

        $errors = array();

        if (!empty($data['config_dataform']) and empty($data['config_view'])) {
            $errors['config_view'] = get_string('missingview', 'block_dataform_view');
        }

        return $errors;
    }

}