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Widget Walkthrough


The first half of this tutorial introduced you to making a rudimentary but functional widget of the sort you can find on Yahoo's site since its purchase of Konfabulator. In this article, you'll add the finishing touches to increase its functionality.

Author Info:
By: Dan Wellman
Rating: 4 stars4 stars4 stars4 stars4 stars / 6
August 21, 2006
TABLE OF CONTENTS:
  1. · Widget Walkthrough
  2. · Getting the headlines
  3. · Using loops
  4. · Fine tuning headline retrieval
  5. · Publishing your widget

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Widget Walkthrough - Publishing your widget
(Page 5 of 5 )

In order to get your widget published on the Yahoo! Widget Gallery, you need to switch off debugging and package your widget. Right at the top of the file, you'll find the <debug> element; set this to off. To package the application and produce the flat, one-file version of the existing files and folder structure, you'll need to get to grips with the command line interface (CLI) included in the SDK. The converter is situated (on a Windows XP system) at the following location:

C:Program FilesYahoo!Yahoo! Widget Engine

You need to create an output directory at this stage so create a folder, also at the above location, called feeder or something similar. Now open a command prompt.  It will probably open (on a Windows XP system) in your My Document folder so you'll need to use the cd (change directory) command to browse to the location of the CLI. You should also move your widget folder into the same directory as the CLI and output directory. Once this has been done, use the following command to package your creation:

converter_4a convert -v -flat TechFeeder.widget -o outputDirName

You should then end up with a flat file package containing all of the files that make up the widget in the output folder. Your widget should now be ready to go onto the gallery, but don't submit this one (because I already have).

The tagline displayed on the home page of the Widget gallery is "The grass is greener on both sides" which pays homage to widgets' cross platform compatibility. When creating widgets, you should ensure that you test your widget on a Mac and that it runs on both Mac and Windows platforms. I have tested this widget on a Mac and unfortunately, it doesn't work as well as it does on Windows systems; instead, it just displays the first headline. I don't actually know why this is, but I am investigating. In the meantime however, I've specified on the gallery that it's Windows only. Also, the Widget optimizer tool is supposed to be used to remove unnecessary memory forks on widget created on the Mac, but like the converter tool it isn't currently available, so for the time being, those of you on Macs I guess will have to forgo this at present.

There is a lot more that could be done to refine the widget. At this stage it really is just a version 1.0 release. You could add a function that automatically scrolls the headlines perhaps, or create the headlines as individual text elements, each with their own URL property to make them clickable links to each of the news stories, or even include the description in a title element that displays when the mouse runs over each text element; the possibilities are endless.  But what you have now is a very basic, but fully functional widget, produced with ease and in not much time at all. This is the beauty of the Yahoo! Widget Engine, speed and ease of deployment and fully functional information management right on your desktop.


DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware.

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