REPORT-5313 9.0[8.0]新建模板，单元格属性设置样式，切换到预定义样式再切换回来，设计器界面错乱

designer_base/src/com/fr/design/style/background/gradient/GradientBar.java

@@ -182,6 +182,7 @@ public class GradientBar extends JComponent implements UIObserver,ColorSelectabl
         for (int i = 0; i < list.size(); i++) {
             dist[i] = (float) ((list.get(i).getX() - 4) / (max - 4));
         }
+        dist = correctDist(dist);
         LinearGradientPaint paint = new LinearGradientPaint(start, end, dist, c);
 
         g2.setPaint(paint);
@@ -193,6 +194,17 @@ public class GradientBar extends JComponent implements UIObserver,ColorSelectabl
         }
     }
 
+    /**
+     * 确保dist在0-1之间
+     */
+    public float[] correctDist(float[] dist){
+        if (dist.length == 2) {
+            dist[0] = dist[0] < 0 ? 0 : dist[0];
+            dist[1] = dist[1] > 1 ? 1 : dist[1];
+        }
+        return dist;
+    }
+
     /**
      * 状态改变
      */