Provides access to members that control the Cancel Tracker.
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.
Description
The CancelTracker object is the object used by ArcObjects to monitor the Esc key (optionally, the space bar and mouse clicks as well) and to terminate processes at the request of the user. A CancelTracker is typically handed into or created just prior to functions that execute a lengthy operation such as, printing, exporting and drawing.
The ITrackCancel interface provides access to properties and methods that determine if a cancellation has been executed by the user, and also allows developers to specify what actions constitute a cancellation.
Members
| Description | ||
|---|---|---|
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Cancel | Cancels the associated operation. |
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CancelOnClick | Indicates whether mouse clicks should cancel the operation. |
|
CancelOnKeyPress | Indicates whether the escape key and spacebar should cancel the operation. |
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CheckTime | The interval at which the operation will be interrupted to advance progressors and process messages. |
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Continue | Called frequently while associated operation is progressing. A return value of false indicates that the operation should stop. |
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ProcessMessages | An obsolete method. |
|
Progressor | The progressor used to show progress during lengthy operations. |
|
Reset | Resets the manager after the associated operation is finished. |
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StartTimer | An obsolete method. |
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StopTimer | An obsolete method. |
 |
TimerFired | An obsolete method. |
CoClasses that implement ITrackCancel
| CoClasses and Classes | Description |
|---|---|
| CancelTracker (esriDisplay) | Cancel tracker class for interrupting drawing. |
| GPServerTrackCancel (esriGeoprocessing) | GP Server Track Cancel Class. |
| ThreadedJobTrackCancel (esriDataSourcesRaster) | A cancel tracker for threaded jobs. |