Fix an issue with the InfiniteDataTable data source.

Author: BenDol

src/main/java/gwt/material/design/demo/client/application/datatable/custom/CustomDataTableView.java

@@ -62,14 +62,6 @@ interface Binder extends UiBinder<Widget, CustomDataTableView> {
        // Setting table title
         table.getTableTitle().setText("My Custom Table");
 
-        //Adding / removing table toolpanel action buttons / icons
-        Panel panel = table.getScaffolding().getToolPanel();
-        panel.clear();
-        // Add two buttons
-        panel.add(new MaterialIcon(IconType.FAVORITE));
-        panel.add(new MaterialIcon(IconType.DELETE));
-        panel.add(new MaterialIcon(IconType.MESSAGE));
-
         // We will manually add this category otherwise categories
         // can be loaded on the fly with HasDataCategory, or a custom
         // RowComponentFactory as demonstrated below
@@ -297,4 +289,17 @@ public void run() {
             //.log("Row Short Pressed: " + model.getId() + ", x:" + mouseEvent.getPageX() + ", y: " + mouseEvent.getPageY());
         });
     }
+
+    @Override
+    protected void onAttach() {
+        super.onAttach();
+
+        //Adding / removing table toolpanel action buttons / icons
+        Panel panel = table.getScaffolding().getToolPanel();
+        panel.clear();
+        // Add two buttons
+        panel.add(new MaterialIcon(IconType.FAVORITE));
+        panel.add(new MaterialIcon(IconType.DELETE));
+        panel.add(new MaterialIcon(IconType.MESSAGE));
+    }
 }

src/main/java/gwt/material/design/demo/client/application/datatable/table/datasource/PersonDataSource.java

@@ -46,7 +46,11 @@ public PersonDataSource(PersonServiceAsync personService) {
     @Override
     public void load(LoadConfig<Person> loadConfig, LoadCallback<Person> callback) {
         List<CategoryComponent> categories = loadConfig.getOpenCategories();
-        List<String> categoryNames = categories.stream().map(CategoryComponent::getName).collect(Collectors.toList());
+
+        List<String> categoryNames = null;
+        if(categories != null) {
+            categoryNames = categories.stream().map(CategoryComponent::getName).collect(Collectors.toList());
+        }
 
         personService.getPeople(loadConfig.getOffset(), loadConfig.getLimit(), categoryNames,
                 new AsyncCallback<People>() {

src/main/java/gwt/material/design/demo/client/application/datatable/table/service/FakePersonService.java

@@ -58,7 +58,7 @@ public class FakePersonService implements PersonServiceAsync {
     @Override
     public void getPeople(int startIndex, int viewSize, List<String> categories, AsyncCallback<People> async) {
         List<Person> flatData = new ArrayList<>();
-        if(categories == null || categories.isEmpty()) {
+        if(categories == null) {
             // Load all data
             for(String category : FakePersonService.categories) {
                 flatData.addAll(peopleMap.get(category));

src/main/java/gwt/material/design/demo/client/ui/ExternalLibrary.java

@@ -9,9 +9,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- *
+ * 
  *      http://www.apache.org/licenses/LICENSE-2.0
- *
+ * 
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.