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Maximizing a window with full screen mode

From: Silverlight 5 Essential Training

Video: Maximizing a window with full screen mode

When you create a desktop application, it is common to launch it in full-screen mode. In web applications, however, this is not as easy. Because web apps run inside the browser, it is the browser that is maximized. The solution for the HTML world has been to remove the browser chrome and then ask for a maximum-sized window. Silverlight has a full- screen mode for this purpose. For this demonstration, I will use Visual Studio and a project called UsingFullScreenmode. This is my user interface for my application. I have two text boxes for the users to enter some comments about their vacation stay, and then they can click on this Update profile.

Maximizing a window with full screen mode

When you create a desktop application, it is common to launch it in full-screen mode. In web applications, however, this is not as easy. Because web apps run inside the browser, it is the browser that is maximized. The solution for the HTML world has been to remove the browser chrome and then ask for a maximum-sized window. Silverlight has a full- screen mode for this purpose. For this demonstration, I will use Visual Studio and a project called UsingFullScreenmode. This is my user interface for my application. I have two text boxes for the users to enter some comments about their vacation stay, and then they can click on this Update profile.

I would like to run this application in full-screen mode, so I've provided two buttons: Go FullScreen and Restore to Normal Screen. Here is what the code looks like. It just takes a single line of code to switch to full-screen mode and a single line of code to switch out of full-screen mode. This is how you would determine if you're in a full-screen mode, by writing an if statement like this. Let's run the application and see what it looks like. I want to be clear about the difference between a window being in maximized mode, like this, as opposed to being in full-screen mode.

Let's watch the difference. Go FullScreen. Notice that there is no window chrome? You might have noticed there was also a notification to the user. Let's watch that again. I'll click on Go FullScreen and in the center of the screen, you'll see this gray box pop up. This is just to notify the user that they are in full-screen mode and it provides a way for them to escape full-screen mode if I didn't provide this Restore to Normal Screen button. They can press Escape to go back to normal mode. There are restrictions placed on your application if you use the full-screen mode.

Some of the limitations are included to prevent application spoofing. Imagine for a moment that a hacker shows a spoof screen of your favorite application and tricks you into revealing sensitive information. To combat this issue, Microsoft forbids certain actions for full-screen apps. For starters, you cannot enter full- screen mode without the user approval. On my application, they clicked on the button to enter the full-screen mode. Silverlight only permits one app to be in full-screen mode at a time. It also blocks most keystrokes from reaching your application. Again, this is due to security concerns.

In full-screen mode, you get access to the arrow keys, then navigation keys like Home and Page Up, and you also get access to Tab and Spacebar. If you create an elevated-trust application and the user grants permission to your app, you can also gain full keyboard access. Let's take a look. I'm in normal mode in my application. The user can come in here and type in the name of their bungalow they stayed in, and their comments, and then they can click on the Update profile button.

Now let's enter full-screen mode. I'm typing in this text box--you can't see it, but I am--and nothing is showing up in the text box. I'm being blocked because I'm in full-screen mode. To allow keystrokes, I need to go to elevated trust. To do that, I'll switch back to Visual Studio, open up my Property window, choose Silverlight, and then scroll down, and check Require elevated trust when running in-browser. Press F5 to run the application again, go to full-screen mode, and now I'm able to type in the text box.

There's another issue with being in full-screen mode, that's what happens when you switch to another application. I'm going to switch to Notepad. Do you see what happened to my full-screen application? It's now back in normal mode. This doesn't work very well if I was trying to watch a movie on another screen on my computer and I want to do some work on the main screen, now I lost my full-screen movie viewer. So I can asked to be kept in full-screen mode. Switch back to my project, go to my code behind, and let me show you the code on that checkbox.

When the user checks the checkbox, I set this FullScreenOptions to StaysFullScreenWhenUnfocused. And when they uncheck the checkbox, I set it back to Options = None. Now, let me switch my Required elevated trust back to normal before running this demo. Press F5. I'll check Keep Full Screen, and then I'll click on Go FullScreen. Silverlight is not going to allow this to happen unless the user permits it, so the user needs to press Yes or No here.

They can also click on this check box to Remember my answer. I'm going to say Yes to stay in full-screen mode, and now I'm going to switch back to Notepad and you see that Notepad is on top of my full-screen application. I can change focus back and forth between these two, and it won't move my application out of full-screen mode. Full-screen is a useful concept. It's perfect for certain applications, like movie viewers. I'm sure you'll find a use for full screen in one of your applications.

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This video is part of

Image for Silverlight 5 Essential Training
Silverlight 5 Essential Training

106 video lessons · 5392 viewers

Walt Ritscher
Author

 
Expand all | Collapse all
  1. 1m 41s
    1. Welcome
      53s
    2. Using the exercise files
      48s
  2. 35m 0s
    1. Overview of Silverlight
      3m 29s
    2. Setting up a developer computer
      2m 46s
    3. Installing the Silverlight Toolkit
      2m 21s
    4. Exploring the toolkit samples
      2m 35s
    5. Using Visual Studio 2010 to create a Silverlight project
      5m 10s
    6. Using Expression Blend to create a Silverlight project
      3m 13s
    7. Getting to know the Visual Studio interface
      8m 15s
    8. Working in the Expression Blend interface
      7m 11s
  3. 29m 46s
    1. Understanding the Visual Studio project structure
      3m 38s
    2. Creating a Silverlight page
      3m 17s
    3. Compiling your first application
      5m 0s
    4. Using other assemblies in an application
      5m 45s
    5. Deploying a Silverlight application
      3m 43s
    6. Understanding the startup process for an application
      3m 13s
    7. Understanding how users get Silverlight on their computers
      5m 10s
  4. 16m 59s
    1. Exploring the relationship between XAML and .NET
      3m 57s
    2. Using C#
      7m 16s
    3. Exploring the code-behind file
      5m 46s
  5. 43m 22s
    1. Working with XAML elements and Property attributes
      4m 56s
    2. Investigating XAML namespaces
      7m 31s
    3. Converting XAML properties with TypeConverters
      5m 1s
    4. Working with Property elements
      4m 24s
    5. Assigning runtime data with XAML markup extensions
      4m 21s
    6. Digging into the dependency property system
      6m 12s
    7. Creating a custom dependency property
      4m 42s
    8. Understanding attached properties
      6m 15s
  6. 9m 35s
    1. Debugging your code
      5m 17s
    2. Special Silverlight debugging techniques
      4m 18s
  7. 36m 0s
    1. Understanding layout
      4m 55s
    2. Using DockPanel and WrapPanel
      4m 2s
    3. Exploring sophisticated layouts with the Grid
      6m 40s
    4. Absolute positioning with the Canvas panel
      5m 20s
    5. Scrolling content with the ScrollViewer
      3m 28s
    6. Adjusting content alignment, margins, and sizing
      5m 6s
    7. Using the TabControl
      2m 17s
    8. Manipulating elements with transforms
      4m 12s
  8. 20m 32s
    1. Painting the user interface (UI) with SolidColorBrush
      6m 7s
    2. Getting colorful with gradient brushes
      3m 15s
    3. Decorating elements with ImageBrush
      4m 56s
    4. Creating effects with VideoBrush
      6m 14s
  9. 25m 42s
    1. Understanding routed events
      3m 12s
    2. Wiring up event handlers in Silverlight
      6m 4s
    3. Understanding event bubbling
      4m 39s
    4. Exploring mouse events
      7m 43s
    5. Exploring keyboard events
      4m 4s
  10. 32m 31s
    1. Displaying text on the screen
      3m 24s
    2. Gathering text input from the user
      5m 30s
    3. Showing complex text with RichTextBox
      6m 7s
    4. Understanding text overflow and text linking
      3m 14s
    5. Searching content with the AutoComplete type-ahead control
      6m 45s
    6. Using and embedding Silverlight fonts
      7m 31s
  11. 26m 47s
    1. Understanding content controls
      5m 7s
    2. Understanding button controls
      6m 16s
    3. Using the BusyIndicator
      4m 40s
    4. Showing tooltips
      4m 34s
    5. Changing content size with ViewBox
      1m 39s
    6. Exploring more controls
      4m 31s
  12. 55m 36s
    1. Connecting elements with binding
      9m 54s
    2. Using business data in a binding
      9m 21s
    3. Listing data with ItemsControls
      6m 39s
    4. Digging into the DataGrid
      8m 28s
    5. Using the DataForm
      3m 49s
    6. Storing data on the client
      7m 10s
    7. Debugging XAML bindings
      5m 41s
    8. Charting data
      4m 34s
  13. 24m 36s
    1. Creating an Out-of-Browser (OOB) application
      6m 16s
    2. Controlling aspects of an OOB application
      2m 49s
    3. Alerting the user with notification windows
      7m 13s
    4. Hosting HTML content in Silverlight applications
      8m 18s
  14. 30m 2s
    1. Exploring Silverlight trust levels
      3m 51s
    2. Creating an elevated trust application
      5m 57s
    3. Reaping the benefits of XAP signing
      6m 5s
    4. Making cross-domain calls
      5m 1s
    5. Getting started with COM Interop using the Speech API
      4m 21s
    6. Using COM Interop to interact with Microsoft Office
      4m 47s
  15. 16m 33s
    1. Showing child windows
      3m 48s
    2. Using a child window as a dialog window
      5m 7s
    3. Creating native windows
      2m 53s
    4. Maximizing a window with full screen mode
      4m 45s
  16. 13m 20s
    1. Dynamically loading UI content with user controls
      4m 46s
    2. Using the Navigation Framework
      8m 34s
  17. 9m 28s
    1. Using resource files
      3m 53s
    2. Using images in an application
      5m 35s
  18. 16m 32s
    1. Playing audio
      4m 27s
    2. Playing sound effects
      5m 4s
    3. Viewing video content with MediaElement
      4m 58s
    4. Changing video playback speed with TrickPlay
      2m 3s
  19. 14m 40s
    1. Capturing video with a web camera
      4m 16s
    2. Working with a microphone
      3m 47s
    3. Creating print output
      6m 37s
  20. 22m 35s
    1. Understanding Silverlight animations
      4m 35s
    2. Creating animations
      7m 52s
    3. Controlling animations
      4m 18s
    4. Simulating physics with animation easings
      5m 50s
  21. 27m 47s
    1. Placing XAML resources within a FrameworkElement
      6m 47s
    2. Centralizing settings in styles
      4m 8s
    3. Creating an alternate control UI with ControlTemplates
      6m 29s
    4. Dressing up your data with DataTemplates
      4m 33s
    5. Explaining the VisualStateManager: a simple way to manage control states
      5m 50s
  22. 10m 55s
    1. Handling global errors in a Silverlight application
      5m 46s
    2. Showing an application loading screen
      5m 9s
  23. 10m 48s
    1. Integrating with XNA
      7m 40s
    2. Exploring data analysis with PivotViewer
      3m 8s
  24. 1m 6s
    1. Goodbye
      1m 6s

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