* [task#127426] render region input for canvas.

lib/zin/wg/think3c/js/v1.js

@@ -250,6 +250,16 @@ function drawRegionInput(canvas, region, colorIndex, area)
         color: '#000',
         backgroundColor: colors[colorIndex % colors.length],
     };
+
+    const input = document.createElement('input');
+    input.type        = 'text';
+    input.value       = area;
+    input.id          = `input_${colorIndex}`;
+    input.name        = `area[${area}]`;
+    input.placeholder = area;
+    Object.assign(input.style, styles);
+
+    canvas.parentNode.appendChild(input);
 }
 
 /**

lib/zin/wg/think3c/v1.php

@@ -11,11 +11,11 @@ class think3c extends thinkModel
         return file_get_contents(__DIR__ . DS . 'js' . DS . 'v1.js');
     }
 
-    protected function buildBody(): array
+    protected function buildBody(): node
     {
         jsVar('modelImg', 'data/thinmory/thumbnail/init3c.png');
 
-        return array(h::canvas(setID('canvas')));
+        return div(setCLass('relative'), h::canvas(setID('canvas')));
     }
 
     protected function build(): node