diff --git a/designer-base/src/main/java/com/fr/design/style/background/gradient/GradientBar.java b/designer-base/src/main/java/com/fr/design/style/background/gradient/GradientBar.java
index 25467b02ba..74afec7efd 100644
--- a/designer-base/src/main/java/com/fr/design/style/background/gradient/GradientBar.java
+++ b/designer-base/src/main/java/com/fr/design/style/background/gradient/GradientBar.java
@@ -134,28 +134,7 @@ public class GradientBar extends AbstractComponentPopBox implements UIObserver,
     protected void addMouseDragListener() {
         this.addMouseMotionListener(new MouseAdapter() {
             public void mouseDragged(MouseEvent e) {
-                int oldIndex = index;
-                for (int i = 0; i < list.size(); i++) {
-                    if (list.get(i).contains(e.getX(), e.getY())) {
-                        index = i;
-                        break;
-                    }
-                }
-                if (OperatingSystem.isLinux() && AssistUtils.equals(oldIndex, index)) {
-                    if (Math.abs(p1.getX() - e.getX()) > Math.abs(p2.getX() - e.getX())) {
-                        index = 1;
-                    } else {
-                        index = 0;
-                    }
-                }
-                boolean x = e.getX() <= max && e.getX() >= min;
-                if (x && e.getY() < MAX_VERTICAL) {
-                    list.get(index).setX(e.getX());
-                }
-
-                GradientBar.this.repaint();
-                startLabel.setText(Double.toString(p1.getX()));
-                endLabel.setText(Double.toString(p2.getX()));
+                dragAction(e);
             }
         });
     }
@@ -336,4 +315,29 @@ public class GradientBar extends AbstractComponentPopBox implements UIObserver,
     public void setDraggable(boolean draggable) {
         this.draggable = draggable;
     }
+
+    private void dragAction(MouseEvent e) {
+        int oldIndex = index;
+        for (int i = 0; i < list.size(); i++) {
+            if (list.get(i).contains(e.getX(), e.getY())) {
+                index = i;
+                break;
+            }
+        }
+        if (OperatingSystem.isLinux() && AssistUtils.equals(oldIndex, index)) {
+            if (Math.abs(p1.getX() - e.getX()) > Math.abs(p2.getX() - e.getX())) {
+                index = 1;
+            } else {
+                index = 0;
+            }
+        }
+        boolean x = e.getX() <= max && e.getX() >= min;
+        if (x && e.getY() < MAX_VERTICAL) {
+            list.get(index).setX(e.getX());
+        }
+
+        GradientBar.this.repaint();
+        startLabel.setText(Double.toString(p1.getX()));
+        endLabel.setText(Double.toString(p2.getX()));
+    }
 }
\ No newline at end of file