Article
11/18/2011

MultiScaleSubImage Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

This class holds the properties for each sub-image within the MultiScaleImage.

Inheritance Hierarchy

System.Object
System.Windows.DependencyObject
System.Windows.Controls.MultiScaleSubImage

Namespace: System.Windows.Controls
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public NotInheritable Class MultiScaleSubImage _
    Inherits DependencyObject

public sealed class MultiScaleSubImage : DependencyObject

The MultiScaleSubImage type exposes the following members.

Constructors

	Name	Description
	MultiScaleSubImage	Initializes a new instance of the MultiScaleSubImage class.

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Properties

	Name	Description
	AspectRatio	Gets the aspect ratio of the image used as the source of the MultiScaleSubImage. The aspect ratio is the width of the image divided by its height.
	Dispatcher	Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
	Id	Gets the Id of the image used as the source of the MultiScaleSubImage.
	Opacity	Gets or sets the degree of the MultiScaleSubImage opacity.
	OriginalPixelHeight	Gets the original height of the image to be displayed.
	OriginalPixelWidth	Gets the original width of the image to be displayed.
	ViewportOrigin	Gets or sets the top-left corner of the area of the image to be displayed.
	ViewportWidth	Gets or sets the width of the area of the image displayed.
	ZIndex	Gets or sets a value that represents the z-order rendering behavior of the MultiScaleSubImage. Z-order determines the relative rendering order of objects (which object is on top of which other objects).

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Methods

	Name	Description
	CheckAccess	Determines whether the calling thread has access to this object. (Inherited from DependencyObject.)
	ClearValue	Clears the local value of a dependency property. (Inherited from DependencyObject.)
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetAnimationBaseValue	Returns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetValue	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ReadLocalValue	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
	SetValue	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Fields

	Name	Description
	AspectRatioProperty	Identifies the AspectRatio dependency property.
	IdProperty	Identifies the Id dependency property.
	OpacityProperty	Identifies the Opacity dependency property.
	OriginalPixelHeightProperty	Identifies the OriginalPixelHeight dependency property.
	OriginalPixelWidthProperty	Identifies the OriginalPixelWidth dependency property.
	ViewportOriginProperty	Identifies the ViewportOrigin dependency property.
	ViewportWidthProperty	Identifies the ViewportWidth dependency property.
	ZIndexProperty	Identifies the ZIndex dependency property.

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Remarks

If you want to work with a set of individual images, for example, programmatically move individual images around the screen or filter your images, you will want to use a collection of images rather than a single high-resolution image. There are two basic things you need to do to do this:

You need to export your images as a collection rather than a single image. You can do this in Deep Zoom Composer. Just make sure to check the "Create Collection" checkbox when you export your composition. Images within the collection you export are called "sub images".
You can access the sub images in a MultiScaleImage (individual MultiScaleSubImage objects) you created in step 1 by using the SubImages property.

XAML usage for this class is technically possible but is not shown, because a XAML usage does not serve a purpose in any existing Silverlight content model. The subimages are the result of processing of an image set by a tool, and are not created in pure markup. Typically, you interact with this class by getting the value of MultiScaleImage.SubImages. It is possible to apply a XAML defined style to MultiScaleImage properties.

Examples

The following example shows how to get a list of sub images in a MultiScaleSubImage.

Private Function RandomizedListOfImages() As List(Of MultiScaleSubImage)
    Dim imageList As New List(Of MultiScaleSubImage)()
    Dim ranNum As New Random()

    ' Store List of sub images.
    For Each subImage As MultiScaleSubImage In MyMSI.SubImages
        imageList.Add(subImage)
    Next

    Return imageList
End Function

private List<MultiScaleSubImage> RandomizedListOfImages()
{
    List<MultiScaleSubImage> imageList = new List<MultiScaleSubImage>();
    Random ranNum = new Random();

    // Store List of sub images.
    foreach (MultiScaleSubImage subImage in MyMSI.SubImages)
    {
        imageList.Add(subImage);
    }

    return imageList;
}

The following example allows you to rearrange images in a grid pattern by manipulating all the MultiScaleSubImage objects in the collection. Click on the "Randomize Images" button to see the effect.

Run this sample

Download this sample

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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