item_form.php

很棒的在线教学系统

            }
            $mform->setHelpButton('aggregationcoef', array($coefstring, get_string($coefstring, 'grades'), 'grade'), true);
        }

/// hidden params
        $mform->addElement('hidden', 'id', 0);
        $mform->setType('id', PARAM_INT);

        $mform->addElement('hidden', 'courseid', $COURSE->id);
        $mform->setType('courseid', PARAM_INT);

        $mform->addElement('hidden', 'itemtype', 'manual'); // all new items are manual only
        $mform->setType('itemtype', PARAM_ALPHA);

/// add return tracking info
        $gpr = $this->_customdata['gpr'];
        $gpr->add_mform_elements($mform);

/// mark advanced according to site settings
        if (isset($CFG->grade_item_advanced)) {
            $advanced = explode(',', $CFG->grade_item_advanced);
            foreach ($advanced as $el) {
                if ($mform->elementExists($el)) {
                    $mform->setAdvanced($el);
                }
            }
        }
//-------------------------------------------------------------------------------
        // buttons
        $this->add_action_buttons();
    }


/// tweak the form - depending on existing data
    function definition_after_data() {
        global $CFG, $COURSE;

        $mform =& $this->_form;

        if ($id = $mform->getElementValue('id')) {
            $grade_item = grade_item::fetch(array('id'=>$id));

            if (!$grade_item->is_raw_used()) {
                $mform->removeElement('plusfactor');
                $mform->removeElement('multfactor');
            }

            if ($grade_item->is_outcome_item()) {
                // we have to prevent incompatible modifications of outcomes if outcomes disabled
                $mform->removeElement('grademax');
                $mform->removeElement('grademin');
                $mform->removeElement('gradetype');
                $mform->removeElement('display');
                $mform->removeElement('decimals');
                $mform->hardFreeze('scaleid');

            } else {
                if ($grade_item->is_external_item()) {
                    // following items are set up from modules and should not be overrided by user
                    $mform->hardFreeze('itemname,idnumber,gradetype,grademax,grademin,scaleid');
                    //$mform->removeElement('calculation');
                }
            }

            //remove the aggregation coef element if not needed
            if ($grade_item->is_course_item()) {
                if ($mform->elementExists('parentcategory')) {
                    $mform->removeElement('parentcategory');
                }
                if ($mform->elementExists('aggregationcoef')) {
                    $mform->removeElement('aggregationcoef');
                }

            } else {
                // if we wanted to change parent of existing item - we would have to verify there are no circular references in parents!!!
                if ($mform->elementExists('parentcategory')) {
                    $mform->hardFreeze('parentcategory');
                }

                if ($grade_item->is_category_item()) {
                    $category = $grade_item->get_item_category();
                    $parent_category = $category->get_parent_category();
                } else {
                    $parent_category = $grade_item->get_parent_category();
                }

                $parent_category->apply_forced_settings();

                if (!$parent_category->is_aggregationcoef_used()) {
                    if ($mform->elementExists('aggregationcoef')) {
                        $mform->removeElement('aggregationcoef');
                    }
                } else {
                    //fix label if needed
                    $agg_el =& $mform->getElement('aggregationcoef');
                    $aggcoef = '';
                    if ($parent_category->aggregation == GRADE_AGGREGATE_WEIGHTED_MEAN) {
                        $aggcoef = 'aggregationcoefweight';

                    } else if ($parent_category->aggregation == GRADE_AGGREGATE_EXTRACREDIT_MEAN) {
                        $aggcoef = 'aggregationcoefextra';

                    } else if ($parent_category->aggregation == GRADE_AGGREGATE_SUM) {
                        $aggcoef = 'aggregationcoefextrasum';
                    }

                    if ($aggcoef !== '') {
                        $agg_el->setLabel(get_string($aggcoef, 'grades'));
                        $mform->setHelpButton('aggregationcoef', array($aggcoef, get_string($aggcoef, 'grades'), 'grade'), true);
                    }
                }
            }

            if ($category = $grade_item->get_item_category()) {
                if ($category->aggregation == GRADE_AGGREGATE_SUM) {
                    if ($mform->elementExists('gradetype')) {
                        $mform->hardFreeze('gradetype');
                    }
                    if ($mform->elementExists('grademin')) {
                        $mform->hardFreeze('grademin');
                    }
                    if ($mform->elementExists('grademax')) {
                        $mform->hardFreeze('grademax');
                    }
                    if ($mform->elementExists('scaleid')) {
                        $mform->removeElement('scaleid');
                    }
                }
            }

        } else {
            // all new items are manual, children of course category
            $mform->removeElement('plusfactor');
            $mform->removeElement('multfactor');
        }

        // no parent header for course category
        if (!$mform->elementExists('aggregationcoef') and !$mform->elementExists('parentcategory')) {
            $mform->removeElement('headerparent');
        }
    }


/// perform extra validation before submission
    function validation($data, $files) {
        global $COURSE;

        $errors = parent::validation($data, $files);

        if (array_key_exists('idnumber', $data)) {
            if ($data['id']) {
                $grade_item = new grade_item(array('id'=>$data['id'], 'courseid'=>$data['courseid']));
                if ($grade_item->itemtype == 'mod') {
                    $cm = get_coursemodule_from_instance($grade_item->itemmodule, $grade_item->iteminstance, $grade_item->courseid);
                } else {
                    $cm = null;
                }
            } else {
                $grade_item = null;
                $cm = null;
            }
            if (!grade_verify_idnumber($data['idnumber'], $COURSE->id, $grade_item, $cm)) {
                $errors['idnumber'] = get_string('idnumbertaken');
            }
        }

        if (array_key_exists('gradetype', $data) and $data['gradetype'] == GRADE_TYPE_SCALE) {
            if (empty($data['scaleid'])) {
                $errors['scaleid'] = get_string('missingscale', 'grades');
            }
        }

        if (array_key_exists('grademin', $data) and array_key_exists('grademax', $data)) {
            if ($data['grademax'] == $data['grademin'] or $data['grademax'] < $data['grademin']) {
                $errors['grademin'] = get_string('incorrectminmax', 'grades');
                $errors['grademax'] = get_string('incorrectminmax', 'grades');
            }
        }

        return $errors;
    }

}
?>