MDL-55308 mod_feedback: Convert analysis chart to the new library

Part of MDL-54987 epic.

mod/feedback/analysis.php

@@ -78,11 +78,9 @@ echo '<div>';
 if ($check_anonymously) {
     // Print the items in an analysed form.
     foreach ($items as $item) {
-        echo "<table class=\"analysis itemtype_{$item->typ}\">";
         $itemobj = feedback_get_item_class($item->typ);
         $printnr = ($feedback->autonumbering && $item->itemnr) ? ($item->itemnr . '.') : '';
         $itemobj->print_analysed($item, $printnr, $mygroupid);
-        echo '</table>';
     }
 } else {
     echo $OUTPUT->heading_with_help(get_string('insufficient_responses_for_this_group', 'feedback'),

mod/feedback/item/info/lib.php

@@ -152,6 +152,7 @@ class feedback_item_info extends feedback_item_base {
     }
 
     public function print_analysed($item, $itemnr = '', $groupid = false, $courseid = false) {
+        echo "<table class=\"analysis itemtype_{$item->typ}\">";
         $analysed_item = $this->get_analysed($item, $groupid, $courseid);
         $data = $analysed_item->data;
         if (is_array($data)) {
@@ -170,6 +171,7 @@ class feedback_item_info extends feedback_item_base {
                 echo '</td></tr>';
             }
         }
+        echo '</table>';
     }
 
     public function excelprint_item(&$worksheet, $row_offset,

mod/feedback/item/multichoice/lib.php

@@ -207,6 +207,7 @@ class feedback_item_multichoice extends feedback_item_base {
         $analysed_item = $this->get_analysed($item, $groupid, $courseid);
         if ($analysed_item) {
             $itemname = $analysed_item[1];
+            echo "<table class=\"analysis itemtype_{$item->typ}\">";
             echo '<tr><th colspan="2" align="left">';
             echo $itemnr . ' ';
             if (strval($item->label) !== '') {
@@ -214,32 +215,32 @@ class feedback_item_multichoice extends feedback_item_base {
             }
             echo $itemname;
             echo '</th></tr>';
-
+            echo "</table>";
             $analysed_vals = $analysed_item[2];
-            $pixnr = 0;
+            $count = 0;
+            $data = [];
             foreach ($analysed_vals as $val) {
-                $intvalue = $pixnr % 10;
-                $pix = $OUTPUT->pix_url('multichoice/' . $intvalue, 'feedback');
-                $pixspacer = $OUTPUT->pix_url('spacer');
-                $pixnr++;
-                $pixwidth = max(2, intval($val->quotient * FEEDBACK_MAX_PIX_LENGTH));
-                $pixwidthspacer = FEEDBACK_MAX_PIX_LENGTH + 1 - $pixwidth;
                 $quotient = format_float($val->quotient * 100, 2);
                 $str_quotient = '';
                 if ($val->quotient > 0) {
                     $str_quotient = ' ('. $quotient . ' %)';
                 }
-                echo '<tr>';
-                echo '<td class="optionname">' .
-                            format_text(trim($val->answertext), FORMAT_HTML, array('noclean' => true, 'para' => false)).':
-                      </td>
-                      <td class="optioncount" style="width:'.FEEDBACK_MAX_PIX_LENGTH.';">
-                        <img class="feedback_bar_image" alt="'.$intvalue.'" src="'.$pix.'" width="'.$pixwidth.'" />'.
-                        '<img class="feedback_bar_image" alt="" src="'.$pixspacer.'" width="'.$pixwidthspacer.'" />
-                        '.$val->answercount.$str_quotient.'
-                      </td>';
-                echo '</tr>';
+                $answertext = format_text(trim($val->answertext), FORMAT_HTML,
+                        array('noclean' => true, 'para' => false));
+
+                $data['labels'][$count] = $answertext;
+                $data['series'][$count] = $val->answercount;
+                $data['series_labels'][$count] = $str_quotient;
+                $count++;
             }
+            $chart = new \core\chart_bar();
+            $chart->set_horizontal(true);
+            $series = new \core\chart_series(format_string(get_string("responses", "feedback")), $data['series']);
+            $series->set_labels($data['series_labels']);
+            $chart->add_series($series);
+            $chart->set_labels($data['labels']);
+
+            echo $OUTPUT->render($chart);
         }
     }
 

mod/feedback/item/multichoicerated/lib.php

@@ -178,6 +178,7 @@ class feedback_item_multichoicerated extends feedback_item_base {
         global $OUTPUT;
         $analysed_item = $this->get_analysed($item, $groupid, $courseid);
         if ($analysed_item) {
+            echo "<table class=\"analysis itemtype_{$item->typ}\">";
             echo '<tr><th colspan="2" align="left">';
             echo $itemnr . ' ';
             if (strval($item->label) !== '') {
@@ -185,34 +186,35 @@ class feedback_item_multichoicerated extends feedback_item_base {
             }
             echo $analysed_item[1];
             echo '</th></tr>';
+            echo '</table>';
             $analysed_vals = $analysed_item[2];
-            $pixnr = 0;
             $avg = 0.0;
+            $count = 0;
+            $data = [];
             foreach ($analysed_vals as $val) {
-                $intvalue = $pixnr % 10;
-                $pix = $OUTPUT->pix_url('multichoice/' . $intvalue, 'feedback');
-                $pixspacer = $OUTPUT->pix_url('spacer');
-                $pixnr++;
-                $pixwidth = intval($val->quotient * FEEDBACK_MAX_PIX_LENGTH);
-                $pixwidthspacer = FEEDBACK_MAX_PIX_LENGTH + 1 - $pixwidth;
-
                 $avg += $val->avg;
                 $quotient = format_float($val->quotient * 100, 2);
-                echo '<tr>';
-                echo '<td class="optionname">';
-                echo '<span class="weight">('.$val->value.') </span>'.
-                        format_text(trim($val->answertext), FORMAT_HTML, array('noclean' => true, 'para' => false)).':</td>';
-                echo '<td class="optionvalue" style="width: '.FEEDBACK_MAX_PIX_LENGTH.'">';
-                echo '<img class="feedback_bar_image" alt="'.$intvalue.'" src="'.$pix.'" width="'.$pixwidth.'" />';
-                echo '<img class="feedback_bar_image" alt="" src="'.$pixspacer.'" width="'.$pixwidthspacer.'" /> ';
-                echo $val->answercount;
+                $answertext = format_text(trim($val->answertext), FORMAT_HTML,
+                        array('noclean' => true, 'para' => false));
                 if ($val->quotient > 0) {
-                    echo ' ('.$quotient.' %)';
+                    $str_quotient = ' ('.$quotient.' %)';
                 } else {
-                    echo '';
+                    $str_quotient = '';
                 }
-                echo '</td></tr>';
+
+                $data['labels'][$count] = $answertext;
+                $data['series'][$count] = $val->answercount;
+                $data['series_labels'][$count] = $str_quotient;
+                $count++;
             }
+            $chart = new \core\chart_bar();
+            $chart->set_horizontal(true);
+            $series = new \core\chart_series(format_string(get_string("responses", "feedback")), $data['series']);
+            $series->set_labels($data['series_labels']);
+            $chart->add_series($series);
+            $chart->set_labels($data['labels']);
+            echo $OUTPUT->render($chart);
+
             $avg = format_float($avg, 2);
             echo '<tr><td align="left" colspan="2"><b>';
             echo get_string('average', 'feedback').': '.$avg.'</b>';

mod/feedback/item/numeric/lib.php

@@ -142,6 +142,7 @@ class feedback_item_numeric extends feedback_item_base {
         $values = $this->get_analysed($item, $groupid, $courseid);
 
         if (isset($values->data) AND is_array($values->data)) {
+            echo "<table class=\"analysis itemtype_{$item->typ}\">";
             echo '<tr><th colspan="2" align="left">';
             echo $itemnr . ' ';
             if (strval($item->label) !== '') {
@@ -164,6 +165,7 @@ class feedback_item_numeric extends feedback_item_base {
             echo '<tr><td colspan="2"><b>';
             echo get_string('average', 'feedback').': '.$avg;
             echo '</b></td></tr>';
+            echo '</table>';
         }
     }
 

mod/feedback/item/textarea/lib.php

@@ -133,6 +133,7 @@ class feedback_item_textarea extends feedback_item_base {
     public function print_analysed($item, $itemnr = '', $groupid = false, $courseid = false) {
         $values = feedback_get_group_values($item, $groupid, $courseid);
         if ($values) {
+            echo "<table class=\"analysis itemtype_{$item->typ}\">";
             echo '<tr><th colspan="2" align="left">';
             echo $itemnr . ' ';
             if (strval($item->label) !== '') {
@@ -148,6 +149,7 @@ class feedback_item_textarea extends feedback_item_base {
                 echo '</td>';
                 echo '</tr>';
             }
+            echo '</table>';
         }
     }
 

mod/feedback/item/textfield/lib.php

@@ -129,6 +129,7 @@ class feedback_item_textfield extends feedback_item_base {
     public function print_analysed($item, $itemnr = '', $groupid = false, $courseid = false) {
         $values = feedback_get_group_values($item, $groupid, $courseid);
         if ($values) {
+            echo "<table class=\"analysis itemtype_{$item->typ}\">";
             echo '<tr><th colspan="2" align="left">';
             echo $itemnr . ' ';
             if (strval($item->label) !== '') {
@@ -142,6 +143,7 @@ class feedback_item_textfield extends feedback_item_base {
                 echo str_replace("\n", '<br />', $value->value);
                 echo '</td></tr>';
             }
+            echo '</table>';
         }
     }