diff --git a/painter.js b/painter.js
index b06367b..7d504a4 100644
--- a/painter.js
+++ b/painter.js
@@ -63,6 +63,15 @@ Component({
           this.doAction(newVal)
         }
       },
+    },
+    disableAction: {
+      type: Boolean,
+      observer: function (isDisabled) {
+        let style = isDisabled ? 'visibility: hidden' : ''
+        this.setData({
+          frontStyle: style
+        })
+      }
     }
   },
 
@@ -70,6 +79,7 @@ Component({
     picURL: '',
     showCanvas: true,
     painterStyle: '',
+    frontStyle: '',
   },
 
   methods: {
diff --git a/painter.wxml b/painter.wxml
index 38673ae..183e2ff 100644
--- a/painter.wxml
+++ b/painter.wxml
@@ -5,7 +5,7 @@
   <canvas canvas-id="top" style="{{painterStyle}};position: absolute;" />
   <canvas 
     canvas-id="front" 
-    style="{{painterStyle}};position: absolute;"
+    style="{{painterStyle}};position: absolute;{{frontStyle}};"
     bindtouchstart="onTouchStart"
     bindtouchmove="onTouchMove"
     bindtouchend="onTouchEnd"