Created the busy indicator component

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/leaderboard/LeaderboardPanel.java

@@ -66,6 +66,7 @@ import com.sap.sailing.gwt.ui.shared.components.Component;
 import com.sap.sailing.gwt.ui.shared.components.IsEmbeddableComponent;
 import com.sap.sailing.gwt.ui.shared.components.SettingsDialog;
 import com.sap.sailing.gwt.ui.shared.components.SettingsDialogComponent;
+import com.sap.sailing.gwt.ui.shared.panels.BusyIndicator;
 
 /**
  * A leaderboard essentially consists of a table widget that in its columns displays the entries.
@@ -1524,4 +1525,16 @@ public class LeaderboardPanel extends FormPanel implements TimeListener, PlaySta
             leaderboardSelectionModel.setSelected(row, false);
         }
     }
+
+    @Override
+    public BusyIndicator getBusyIndicator() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    @Override
+    public boolean hasBusyIndicator() {
+        // TODO Auto-generated method stub
+        return false;
+    }
 }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/shared/components/CollapsablePanel.java

@@ -45,37 +45,7 @@ public final class CollapsablePanel extends Composite implements HasWidgets.ForI
         HasOpenHandlers<CollapsablePanel>, HasCloseHandlers<CollapsablePanel> {
 
     private static ComponentResources resources = GWT.create(ComponentResources.class);
-
-    /**
-     * Used to wrap widgets in the header to provide click support. Effectively wraps the widget in an
-     * <code>anchor</code> to get automatic keyboard access.
-     */
-    /*
-    private final class ClickableHeader extends SimplePanel {
-
-        private ClickableHeader() {
-            // Anchor is used to allow keyboard access.
-            super(DOM.createAnchor());
-            Element elem = getElement();
-            DOM.setElementProperty(elem, "href", "javascript:void(0);");
-            // Avoids layout problems from having blocks in inlines.
-            DOM.setStyleAttribute(elem, "display", "block");
-            sinkEvents(Event.ONCLICK);
-            setStyleName(STYLENAME_HEADER);
-        }
-
-        @Override
-        public void onBrowserEvent(Event event) {
-            // no need to call super.
-            switch (DOM.eventGetType(event)) {
-            case Event.ONCLICK:
-                // Prevent link default action.
-                DOM.eventPreventDefault(event);
-                setOpen(!isOpen);
-            }
-        }
-    }
-*/
+    
     /**
      * An {@link Animation} used to open the content.
      */

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/shared/components/IsEmbeddableComponent.java

@@ -1,6 +1,7 @@
 package com.sap.sailing.gwt.ui.shared.components;
 
 import com.google.gwt.user.client.ui.Widget;
+import com.sap.sailing.gwt.ui.shared.panels.BusyIndicator;
 
 public interface IsEmbeddableComponent {
 
@@ -10,7 +11,11 @@ public interface IsEmbeddableComponent {
 
     Widget getToolbarWidget();
     
+    BusyIndicator getBusyIndicator();
+    
     boolean isEmbedded();
     
     boolean hasToolbar();
+    
+    boolean hasBusyIndicator();
 }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/shared/panels/BusyIndicator.java

@@ -0,0 +1,27 @@
+package com.sap.sailing.gwt.ui.shared.panels;
+
+import com.google.gwt.core.client.GWT;
+import com.google.gwt.user.client.ui.FlowPanel;
+
+/**
+ * A widget to show if something is currently busy.
+ * @author Lennart Hensler (D054527)
+ */
+public abstract class BusyIndicator extends FlowPanel {
+    
+    protected final static String STYLE_NAME_PREFIX = "busyIndicator-";
+    protected final static SharedPanelsResources RESOURCES = GWT.create(SharedPanelsResources.class);
+    
+    protected boolean busy;
+    
+    /**
+     * Sets the <code>busy</code> state of the BusyIndicator, which displays or hides the busy indicator.
+     * @param busy The new <code>busy</code> state
+     */
+    abstract void setBusy(boolean busy);
+    
+    public boolean isBusy() {
+        return busy;
+    }
+
+}

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/shared/panels/SharedPanelsResources.java

@@ -0,0 +1,11 @@
+package com.sap.sailing.gwt.ui.shared.panels;
+
+import com.google.gwt.resources.client.ClientBundle;
+import com.google.gwt.resources.client.ImageResource;
+
+public interface SharedPanelsResources extends ClientBundle {
+
+    @Source("com/sap/sailing/gwt/ui/client/images/busy_indicator_circle.gif")
+    ImageResource busyIndicatorCircle();
+    
+}

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/shared/panels/SimpleBusyIndicator.java

@@ -0,0 +1,34 @@
+package com.sap.sailing.gwt.ui.shared.panels;
+
+import com.google.gwt.user.client.ui.Image;
+
+public class SimpleBusyIndicator extends BusyIndicator {
+    
+    private Image busyIndicator;
+    
+    /**
+     * Creates a new SimpleBusyIndicator with the <code>busy</code> state <code>false</code>.<br />
+     * The busy indicator component is a circling GIF.
+     */
+    public SimpleBusyIndicator() {
+        this(false);
+    }
+    
+    /**
+     * Creates a new SimpleBusyIndicator with a custom <code>busy</code> state.<br />
+     * The busy indicator component is a circling GIF.
+     */
+    public SimpleBusyIndicator(boolean busy) {
+        busyIndicator = new Image(RESOURCES.busyIndicatorCircle());
+        busyIndicator.setStyleName(STYLE_NAME_PREFIX + "busyIndicatorCircle");
+        add(busyIndicator);
+        setBusy(busy);
+    }
+
+    @Override
+    void setBusy(boolean busy) {
+        this.busy = busy;
+        busyIndicator.setVisible(busy);
+    }
+
+}