ArcObjects Library Reference (Display)

DisplayTransformation CoClass

Display transformation class for converting from world to device units.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Interfaces

Interfaces	Description
IConnectionPointContainer (esriDisplay)	Supports connection points for connectable objects.
IDelayEvents	Provides access to members that control Delay Events.
IDisplayTransformation	Provides access to members that control Display Transformation.
IDisplayTransformationAdmin	Provides access to members that control the DisplayTransformation.
IDisplayTransformationScales	Provides access to members that control Display Transformation scales.
IOutputRasterSettings	Provides access to members that control New Raster Output Settings.
IRasterOutputSettings	Provides access to members that control Raster Output Settings.
ITransformation (esriGeometry)	Provides access to members that apply a function (or its inverse) to a set of points or measures. The suffix of each method indicates the type of parameters operated on.
ITransformationGEN (esriGeometry)	Provides access to members that apply a function (or its inverse) to a set of points or measures. The suffix of each method indicates the type of parameters operated on. ITransformationGEN is generic version of ITransformation.

Event Interfaces

Interfaces	Description
ITransformEvents (default)	Provides access to members that control Transform Events.

Remarks

Manages the map to device transformation. See IDisplayTransformation for information on how to prepare a transform for use.

Each DisplayTransformation object has a spatial reference object which manages the display's current coordinate system.

The DisplayTransformation is itself owned by a Display object, typically ScreenDisplay. Obtain an IDisplayTransformation reference to a DisplayTransformation object via IDisplay::DisplayTransformation; since IScreenDisplay inherits from IDisplay, you call also use IScreenDisplay::DisplayTransformation.

Working with Events

[Visual Basic 6.0]

When working with DisplayTransformation's default outbound interface in Visual Basic 6 declare variables as follows:

Private WithEvents pDisplayTransformation as DisplayTransformation