--- a/flys-client/src/main/java/de/intevation/flys/client/client/ui/GaugePanel.java	Tue Oct 23 14:32:48 2012 +0200
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/ui/GaugePanel.java	Tue Oct 23 15:48:18 2012 +0200
@@ -31,7 +31,7 @@
 public class GaugePanel extends VLayout implements ResizedHandler {
 
     /** SectionStackSection where this GaugePanel belongs in*/
-    private SectionStackSection sectionStack;
+    private SectionStackSection section;
 
     /** Name of the river */
     private String river;
@@ -52,17 +52,17 @@
      * The GaugePanel's SectionStackSection is hidden by default.
      *
      * @param flys The FLYS object
-     * @param sectionStack The section stack section to place the VLayout in.
+     * @param section The section stack section to place the VLayout in.
      */
-    public GaugePanel(FLYS flys, SectionStackSection sectionStack) {
+    public GaugePanel(FLYS flys, SectionStackSection section) {
         gaugetree = new GaugeTree(flys);
         gaugetreecanvas = new Canvas();
         gaugetreecanvas.addChild(gaugetree);
 
         setOverflow(Overflow.HIDDEN);
-        sectionStack.setHidden(true);
-        sectionStack.setItems(this);
-        this.sectionStack = sectionStack;
+        section.setHidden(true);
+        section.setItems(this);
+        this.section = section;
         setStyleName("gaugepanel");
         addResizedHandler(this);
     }
@@ -148,7 +148,7 @@
     @Override
     public void hide() {
         GWT.log("GaugePanel - hide");
-        this.sectionStack.setHidden(true);
+        this.section.setHidden(true);
     }
 
     /**
@@ -157,6 +157,18 @@
     @Override
     public void show() {
         GWT.log("GaugePanel - show");
-        this.sectionStack.setHidden(false);
+        this.section.setHidden(false);
+    }
+
+    @Override
+    public void addMember(Canvas component) {
+        super.addMember(component);
+        section.setExpanded(true);
+    }
+
+    @Override
+    public void removeMembers(Canvas[] components) {
+        super.removeMembers(components);
+        section.setExpanded(false);
     }
 }