REPORT-90581 设计器添加事件菜单没有充满，存在留白

designer-base/src/main/java/com/fr/design/gui/controlpane/UIListGroupControlPane.java

@@ -28,14 +28,7 @@ import javax.swing.event.ListDataEvent;
 import javax.swing.event.ListDataListener;
 import javax.swing.event.ListSelectionEvent;
 import javax.swing.event.ListSelectionListener;
-import java.awt.AlphaComposite;
-import java.awt.BorderLayout;
-import java.awt.Color;
-import java.awt.Dimension;
-import java.awt.FlowLayout;
-import java.awt.FontMetrics;
-import java.awt.Graphics;
-import java.awt.Graphics2D;
+import java.awt.*;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.lang.reflect.Constructor;
@@ -336,7 +329,9 @@ public abstract class UIListGroupControlPane extends UIControlPane implements Li
             Map.Entry<String, ListWrapperPane> entry = iterator.next();
             ListWrapperPane wrapperPane = entry.getValue();
             UIList uiList = wrapperPane.getNameEdList();
-            uiList.setFixedCellWidth(width);
+            //contentPane是外层的Panel，如果不进行判断的话宽度就可能会小于contentPanel，右侧会有空隙
+            //所以需要判断一下，如果外层比较宽就取外层的宽度，防止空隙出现
+            uiList.setFixedCellWidth(Math.max(width, contentPane == null? 0 : contentPane.getWidth()));
         }
     }