The Infinite Scroll widget implements the design pattern also known as Dynamic Scroll or Endless Scroll for the Alloy MVC framework for Titanium by Appcelerator. A Titanium Classic implementation can be found in the KitchenSink.

Also take a look at my Pull to Refresh widget.

The widget automatically shows an ActivityIndicator in a TableView's FooterView when the user reached the end of the table. An event is triggered so that the implementing controller can load more rows.

• Add the widget to your TableView using just one line of code.
• Override all styling via your app's app.tss.
• Manually trigger the widget from your controller.

• Full Android, Mobile Web, Tizen and BlackBerry compatibility and testing.
• Support for ListViews.

• Download the latest release.

• Unzip the file to app/widgets/nl.fokkezb.infiniteScroll.

• Add the widget as a dependency to your app/config.json file:

   	"dependencies": {
   		"nl.fokkezb.infiniteScroll":"1.2"
   	}

• Add the widget to your TableView:

   <TableView>
     <Widget id="is" src="nl.fokkezb.infiniteScroll" onEnd="myLoader" />
   </TableView>

• In the callback set via myLoader you call either e.success(), e.error() or e.done() optionally passing a custom message:

   function myLoader(e) {
   	
   	// Length before
   	var ln = myCollection.length;
   	
   	myCollection.fetch({
   	
   		// Some data for the sync adapter to retrieve next "page"
   		data: { offset: myCollection.length },
   	
   		// Don't reset the collection, but add to it
   		add: true,
   	
   		// Don't trigger an "add" event for every model, but just one "fetch"
   		silent: true,
   		
   		success: function (col) {
   		
   			// Call "done" if we didn't add anymore models
   			(col.length === ln) ? e.done() : e.success();
   		},
   		
   		error: e.error
   	});
   }

The widget can be fully styled without touching the widget source. Use the following ID's in your app's app.tss to override the default style:

There are no required options to pass via TSS properties or XML attributes, apart from the onEnd attribute to bind your callback to the end-event. You can change the displayed messages by using the following options:

You can also manually trigger the loading state of the widget. You could use this for the first load when your window opens.

• 1.2:
  • Now compatible with Android (and other OS)
  • View will now always show since Android doesn't support removing it :(
• 1.1:
  • From now on declared in the XML view instead of the controller!
  • Splitted init into setOptions and attach
  • Renamed remove to dettach
  • Renamed trigger to load to not interfere with BackBone
• 1.0.1:
  • Fixed for Alloy 1.0GA
• 1.0: Initial version itial version

Copyright 2013 Fokke Zandbergen

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.
See the License for the specific language governing permissions and
limitations under the License.