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 74afec7efd..923c8ec39e 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
@@ -318,13 +318,25 @@ public class GradientBar extends AbstractComponentPopBox implements UIObserver,
 
     private void dragAction(MouseEvent e) {
         int oldIndex = index;
-        for (int i = 0; i < list.size(); i++) {
+        int size = list.size();
+        for (int i = 0; i < size; i++) {
             if (list.get(i).contains(e.getX(), e.getY())) {
                 index = i;
                 break;
             }
         }
-        if (OperatingSystem.isLinux() && AssistUtils.equals(oldIndex, index)) {
+        updateX(oldIndex, index, e);
+
+        GradientBar.this.repaint();
+        if (index == 1) {
+            endLabel.setText(Double.toString(p2.getX()));
+        } else {
+            startLabel.setText(Double.toString(p1.getX()));
+        }
+    }
+
+    private void updateX(int oldIndex, int newIndex, MouseEvent e) {
+        if (OperatingSystem.isLinux() && AssistUtils.equals(oldIndex, newIndex)) {
             if (Math.abs(p1.getX() - e.getX()) > Math.abs(p2.getX() - e.getX())) {
                 index = 1;
             } else {
@@ -335,9 +347,5 @@ public class GradientBar extends AbstractComponentPopBox implements UIObserver,
         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