diff --git a/src/graphics/signal/Signal.ts b/src/graphics/signal/Signal.ts
index c8820af..f0ebf2c 100644
--- a/src/graphics/signal/Signal.ts
+++ b/src/graphics/signal/Signal.ts
@@ -54,6 +54,15 @@ export class Signal extends JlGraphic {
     return this.getDatas<ISignalData>();
   }
 
+  get mirror(): boolean {
+    return this.datas.mirror;
+  }
+  set mirror(v: boolean) {
+    const old = this.datas.clone();
+    old.mirror = v;
+    this.updateData(old);
+  }
+
   paint(): void {
     const mirror = this.datas.mirror;
     this.lampMainBody.paint(signalConsts.lampNum, mirror);
diff --git a/src/graphics/signal/SignalDrawAssistant.ts b/src/graphics/signal/SignalDrawAssistant.ts
index 3730017..5b51bcc 100644
--- a/src/graphics/signal/SignalDrawAssistant.ts
+++ b/src/graphics/signal/SignalDrawAssistant.ts
@@ -158,9 +158,8 @@ export class signalInteraction extends GraphicInteractionPlugin<Signal> {
     const signal = target.getGraphic() as Signal;
     this.app.updateSelected(signal);
     mirrorFlipConfig.handler = () => {
-      signal.datas.mirror = !signal.datas.mirror;
-      signal.doRepaint();
-      // console.log('*****mirror', signal);
+      signal.mirror = !signal.mirror;
+      // signal.doRepaint();
     };
     SignalEditMenu.open(e.global);
   }