MDL-14299 New checkbox profile field type.

Credit to Brian King.

user/profile/field/checkbox/define.class.php

@@ -0,0 +1,13 @@
+<?php  //$Id:
+
+class profile_define_checkbox extends profile_define_base {
+
+    function define_form_specific(&$form) {
+        /// select whether or not this should be checked by default
+        $form->addElement('selectyesno', 'defaultdata', get_string('profiledefaultchecked', 'profilefield_checkbox'));
+        $form->setDefault('defaultdata', 0); // defaults to 'no'
+        $form->setType('defaultdata', PARAM_BOOL);
+    }
+}
+
+?>

user/profile/field/checkbox/field.class.php

@@ -0,0 +1,47 @@
+<?php //$Id:
+
+class profile_field_checkbox extends profile_field_base {
+
+    /**
+     * Constructor method.
+     * Pulls out the options for the checkbox from the database and sets the
+     * the corresponding key for the data if it exists
+     */
+    function profile_field_checkbox($fieldid=0, $userid=0) {
+        //first call parent constructor
+        $this->profile_field_base($fieldid, $userid);
+
+        if (!empty($this->field)) {
+            $datafield = get_field('user_info_data', 'data', 'userid', $this->userid, 'fieldid', $this->fieldid);
+            if ($datafield !== false) {
+                $this->data = $datafield;
+            } else {
+                $this->data = $this->field->defaultdata;
+            }
+        }
+    }
+
+    function edit_field_add(&$mform) {
+        /// Create the form field
+        $checkbox = &$mform->addElement('advcheckbox', $this->inputname, format_string($this->field->name));
+        if ($this->data == '1') {
+            $checkbox->setChecked(true);
+        }        
+        $mform->setType($this->inputname, PARAM_BOOL);
+        if ($this->is_required() and !has_capability('moodle/user:update', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
+            $mform->addRule($this->inputname, get_string('required'), 'nonzero', null, 'client');
+        }
+    }
+
+    /**
+     * Display the data for this field
+     */
+    function display_data() {
+        $options->para = false;
+        $checked = intval($this->data) === 1 ? 'checked="checked"' : '';
+        return '<input disabled="disabled" type="checkbox" name="'.$this->inputname.'" '.$checked.' />';
+    }
+
+}
+
+?>