From fafd3b57bd8294525a4310c7b90ba0ba1c2ed789 Mon Sep 17 00:00:00 2001
From: Starryi <starryi@foxmail.com>
Date: Mon, 6 Dec 2021 11:13:47 +0800
Subject: [PATCH] =?UTF-8?q?REPORT-63760=20=E3=80=90=E4=B8=BB=E9=A2=98?=
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【问题原因】
背景色控件中父组件ColorBackgroundQuickPane
和子组件NewColorSelectBox内部实现，都给
NewColorSelectBox添加了监听器，导致颜色值发生
一次更改后，调用了两次回调，产生了两个UndoState

【改动思路】
ColorBackgroundQuickPane的UIObserver实现置空
---
 .../backgroundpane/ColorBackgroundQuickPane.java    | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/designer-base/src/main/java/com/fr/design/mainframe/backgroundpane/ColorBackgroundQuickPane.java b/designer-base/src/main/java/com/fr/design/mainframe/backgroundpane/ColorBackgroundQuickPane.java
index 2fbdb974e..88bedf17c 100644
--- a/designer-base/src/main/java/com/fr/design/mainframe/backgroundpane/ColorBackgroundQuickPane.java
+++ b/designer-base/src/main/java/com/fr/design/mainframe/backgroundpane/ColorBackgroundQuickPane.java
@@ -40,16 +40,15 @@ public class ColorBackgroundQuickPane extends BackgroundQuickPane {
        return this.colorSelectBox.getSelectObject();
     }
 
-    /**
-     * 给组件登记一个观察者监听事件
-     *
-     * @param listener 观察者监听事件
-     */
     @Override
-    public void registerChangeListener(final UIObserverListener listener) {
-        this.colorSelectBox.addSelectChangeListener(new ChangeListenerImpl(listener));
+    public boolean shouldResponseChangeListener() {
+        // NewColorSelectBox实现了UIObserver接口，这里就不要重复注册监听器了，以避免产生重复UndoState.
+        return false;
     }
 
+    @Override
+    public void registerChangeListener(final UIObserverListener listener) { }
+
     @Override
     /**
      * 是否为ColorBackground 类型