CHART-16481 增加空判断

designer-chart/src/main/java/com/fr/van/chart/designer/style/axis/VanChartBaseAxisPane.java

@@ -591,13 +591,15 @@ public class VanChartBaseAxisPane extends FurtherBasicBeanPane<VanChartAxis> {
     }
 
     protected void checkLabelGapPane() {
-        boolean visible = true;
+        if (labelGapPane != null) {
+            boolean visible = true;
 
-        if (showLabelDisplay() && labelDisplayPane != null && labelDisplayComboBox != null) {
-            visible = labelDisplayComboBox.getSelectedIndex() == 0;
-        }
+            if (showLabelDisplay() && labelDisplayPane != null && labelDisplayComboBox != null) {
+                visible = labelDisplayComboBox.getSelectedIndex() == 0;
+            }
 
-        labelGapPane.setVisible(visible);
+            labelGapPane.setVisible(visible);
+        }
     }
 
     protected void checkLabelGapValuePane() {