完善撤回逻辑

src/models/DOBlock.ts

@@ -28,8 +28,7 @@ export class DOBlock {
     }
     public set_show(show: number): void {
         this.data.show = show
-        if (show == this.get_correct())
-            this.checked = true
+        this.checked = show == this.get_correct()
         StorageManager.getInstance().onChanged()
     }
 

src/models/DOStage.ts

@@ -129,8 +129,14 @@ export class DOStage {
     public get_undos(): Array<DataUndo> {
         return this.data.undos
     }
-    public add_undo(type: number, index: number, value: number): void {
-        var dataUndo: DataUndo = {type: type, index: index, value: value}
+    public add_undo(index: number, show: number=0, notes: Array<number>=new Array()): void {
+        var _notes: Array<number>
+        if (notes) {
+            _notes = new Array()
+            for (var i=0; i<notes.length; i++)
+                _notes.push(notes[i])
+        }
+        var dataUndo: DataUndo = {index: index, show: show, notes: _notes}
         console.log("add_undo >>>>>>>>>>>>>>>>>>>>>>>>>>>>", JSON.stringify(dataUndo))
         this.data.undos.push(dataUndo)
         StorageManager.getInstance().onChanged()