Weather Sideshow

• Download demo project - 157 Kb
• Download source - 188 Kb

Contents

• Introduction
• Background
  • Driver and simulator
  • Using the VirtualSideShow
  • Using the binary
• Using the code
• Points of Interest
• History

Introduction

This article explains the power of a new Vista feature, the SideShow. The goal of this article is to use the Sideshow, with as few steps as possible. To demonstrate this, I will get data from a web service. After this article you can use the Gadget Class to retrieve data either from your database or from your program or from the systems, whatever you prefer.

When I developed the article, the framework was in beta.

The environment I used to test it:

• Windows Vista 5384 (Beta2) Eng.
• Windows Vista 5600 Eng.
• Windows Vista Business Ita.

At the end of this document, there are some links that will help you with installing the Microsoft VirtualSideShow.

Background

The Microsoft Windows SideShow Platform is a new feature developed for Microsoft Windows Vista that enables developers to create new applications and extend existing ones specifically for devices with small displays and limited interaction models. Applications designed to work with the platform are referred to as gadgets. The devices supported by the platform include, but are not limited to: displays attached to a laptop, front panel computer displays, displays embedded in keyboards, cell phones, digital picture frames, and other display devices.

Driver and simulator

To compile the code, you must install the SideShow SDK Beta, which is currently available from Microsoft here.

To run the binary you need to obtain two files, a driver and an emulator, which shipped with the Vista SDK.

After installation, you will find the emulator driver (WindowsSideShowVirtualDevice.exe) and emulator (VirtualSideShow.exe) in the 'C:\Program Files\Microsoft SDKs\Windows\v6.0\Bin' directory.

Execute windowsSideShowvirtualdevice.exe /regserver first and VirtualSideShow.exe right after.

In the Control Panel, open Windows SideShow, now you can see the Simulator installed as shown in the picture after.

The VirtualSideShow.exe has only the default item.

When you use my demo and click register, it adds a new item to the list. Then you can run the demo program WeatherSideShow.exe, contained in the demo download.

Info: Note that to see the sample run on the SideShow you must have VirtualSideShow.exe open.

Using the VirtualSideShow

Several options are offered:

• the arrow keys to navigate the menu
• the OK button to enter the gadget and it's menu
• the backspace to go back

Launching and registering WeatherSideShow.exe adds a new item on VirtualSideShow called 'Weather SideShow Gadget'.

The inside menu shows a menu with two items, the first is the data received from WS, the second is the data stored in the application.

Using the binary

First of all you must have VirtualSideShow.exe opened as described above.

• Open my application.
• In the app: Register the gadget with the Register button.
• In Vista: Now if all is well, you can activate the gadget from the SideShow menu in the control panel.

After this you have it in the list of simulator. Now you are ready to communicate with the weather gadget.


• In the app: You must use the button 'Get Country' to add the country and city using the web services to combobox. It may take a minute depending on your connection speed.
• Then you can select the country and city you like and see if the data for the selected item is available.

If you want you can use the timer to refresh automatically and save all selected data.

The SideShow is refreshed every time the 'auto timer' starts and every time you click 'Check weather of saved data'.

Using the code

I have created this project as a C# windows application.

With this application you can retrieve all the cities and countries from the web services I used. Select one and test if your city has weather data.

If you like, you can set a timer to refresh the app and the SideShow automatically.

You can save your data and use it in the next session.

The code follows these ideas:

• MySideShowGadget: a class that communicates with SideShow.
• the registry to save and store data.
• A class for the global weather webservice, and an XML parser to 'translate' data to SideShow.
• A class (GadgetRegistration) to register and unregister the gadget.
• A class (Scf) to download data to the virtual device.
• A timer for automatic refresh.

Here I describe only the calls I used for the SideShow.

Info: I used a free webservice from WebserviceX.NET. If the server is busy and you get the error, "service unavailable", you can see if it's working here.

All the necessary code for the SideShow is in MySideShowGadget. All other classes are used for retriving data and manipulating it.

I used a Guid m_sGadgetId for registering and unregistering the gadget and more important to create ScfSideShowGadget.

MySideShowGadget uses the ScfSideShowGadget Class to add data into the SideShow pages. I added some methods but the most important are:

• Register:

  To register the gadget I used the class GadgetRegistration as described below, with comments. With the GadgetRegistration.Register, the new gadget is added to the SideShow list.

  GadgetRegistration.Register(
  false,                                    //Only for this account
  
  m_sGadgetId,                              //GUID
  
  ScfSideShowGadget.ScfEndpointId,          //EndPoint
  
  m_sGadgetFriendlyName,                    //Name to Display
  
  null,                                     //command to start
  
  null,                                     //the ico
  
  false,                                    //online info
  
  GadgetCachePolicies.KeepNewest,           //the Cache policy
  
  null);                                    //the property page
  
  

• Unregister:

  To unregister the gadget. Deletes the gadget from the SideShow list.

  GadgetRegistration.Unregister(false, m_sGadgetId);
  

• DefaultContent:

  To display text at a glance. I used the method AddGlanceContent to add content. This method adds a string that can be displyed in the description of the gadget in the SideShow menu. I added "Updated on: {0:D}\n {0:T}", DateTime.Now"

  m_oScfSideShowGadget.AddGlanceContent("some text do display");
  

• DownloadDataToDevice:

  The data stored into the application is copied to the SideShow. This method use AddGlanceContent and AddContent to add a page to SideShow display.

  m_oScfSideShowGadget.AddContent(MyXMLPage);
  

  AddContent adds/modifies a page to the content. This method requires an XML string. You can use a xml page directly or use the scf class. You must use it to add all the pages required for the SideShow. In my case, I used it four times.

  Add Body: This is the first use of Scf class. On first use, the scf requires the body be set with Scf.Body. This method takes as input the menu and items:

  sContentXml = Scf.Body(
                Scf.Menu(1, "Weather gadget menu", ScfSelectAction.Target,
                Scf.Item(2, "See Last weather of " + m_sCity + ", " + 
  
  m_sCountry),
                Scf.Item(3, "See all the option")));
  

  Here you can see that I have added the body, one menu and two items inside the gadget.

  Add pages: the second time you use scf call Scf.Content method with the id that you have inserted in the body. In this example I've added a picture and more text:

  Scf.Content(
              2, "Weather of " + m_sCity + ", " + m_sCountry,
              Scf.Txt(ScfAlign.Left, true, Color.Black, m_lblWind + " " + 
  
  m_txtWind),
              Scf.Txt(ScfAlign.Left, true, Color.Black, m_lblVisibility + " " + 
  
  m_txtVisibility),
              Scf.Txt(ScfAlign.Left, true, Color.Black, m_lblSkyCondition + " " + 
  
  m_txtSkyConditions),
              Scf.Txt(ScfAlign.Left, true, Color.Black, m_lblTemperature + " " + 
  
  m_txtTemperature),
              Scf.Txt(ScfAlign.Left, true, Color.Black, m_lblHumidity + " " + 
  
  m_txtHumidity));
  

  Use this method to add all the pages.

This is the sample I share that copies data to SideShow.

This is the result that you can see in your SideShow or VirtualSideShow.

That's all.

Points of Interest

I've yet to find code on the internet that runs like the author said. If you have problems in compiling or executing the project, please leave a post.

Microsoft help, installing VirtualSideShow:

• Re: Problem on Sideshow
• Can't display new gadget with VirtualSideShow??

MSDN help, Scf Members

• Scf Members

History

• 28 Mar 07 - Third release, article update
• 14 Mar 07 - Second release, article update
• 28 Jan 07 - First release

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Good Article! NizZ8 13:06 2 Mar '08   Thanks for posting this, i picked up one of the Momento screens recently and was looking for a start on how to build gadgets for the device. Was able to take what you provided and get things working in minimal amount of time.. Thanks! Sign In·View Thread·PermaLink 5.00/5 (1 vote) Re: Good Article! Dr.Luiji 22:26 2 Mar '08   Hi NizZ8, thank you for the post. The reason can be the free webservice I used (sometime It's busy). You can check the reason debugging the code behind the button btnGetweather, "Check the weather of saved data" to see where it is the problem. Anyway in the bottom of the application i'v add a Status Strip where you can see all the problem found during the execution. PS You have checked the enable auto refresh ? Cheers. Dr.Luiji Trust and you'll be trusted. Sign In·View Thread·PermaLink Good article and gadget marcasselin 3:31 1 May '07   Thank you for the article and gadget. Would you mind if I post your gadget info on another site? You would obviously get all credit for your gadget. We are looking for content to get the site going. http://AgnosticGadgeteer.com. Thank you, Marc Sign In·View Thread·PermaLink 5.00/5 (1 vote) Re: Good article and gadget Dr.Luiji 5:13 1 May '07   Hi Marc, sure, you can insert it, i'm join it today as Dr.Luiji (obviously). Hoping it's useful to someone. Sign In·View Thread·PermaLink Didn't work JoeIsTheMan 8:09 14 Mar '07   I tried this gadget, but I couldn't get it to display anything on my external screen. All Things Joe Sign In·View Thread·PermaLink 1.33/5 (2 votes) Re: Didn't work Dr.Luiji 10:01 14 Mar '07   Thanks for the post Joe. Would you be more specific? You have follow all the steps described above in the 'Background' section? if you have follow these steps, the only reason can be that the free webservice i used (WebserviceX.NET) is busy. You can test it here. Let me know if it work. Sign In·View Thread·PermaLink 4.67/5 (2 votes)

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