images.roi.ROIMovingEventData class

Package: images.roi

Event data passed when ROI is moving

Since R2018b

Description

The images.roi.ROIMovingEventData class is the class passed to listeners when a region-of-interest (ROI) is moving. When the ROI class triggers an event using the notify handle class method, MATLAB^® assigns values to the properties of an images.roi.ROIMovingEventData object and passes that object to the listener callback function (the event handler).

The images.roi.ROIMovingEventData class is a handle class.

Class Attributes

ConstructOnLoad	true
HandleCompatible	true

For information on class attributes, see Class Attributes.

Creation

The notify handle class method creates an images.roi.ROIMovingEventData object when called to trigger an event. images.roi.ROIMovingEventData does not accept input arguments. Subclasses of event.EventData cannot pass arguments to the superclass constructor.

Properties

Source — Event source

object

Event source, specified as a handle to the object that triggered the event.

Attributes:

GetAccess	public
SetAccess	private
GetObservable	true
SetObservable	true

EventName — Name of event

character vector

Name of the event, specified as a character vector.

Attributes:

GetAccess	public
SetAccess	private
GetObservable	true
SetObservable	true

Data Types: char

PreviousPosition — Position before ROI moved

two-element numeric vector

Position before the ROI moved, specified as a two-element numeric vector of the form [x y].

Attributes:

GetAccess	public
SetAccess	private
GetObservable	true
SetObservable	true

Data Types: char

CurrentPosition — Position after ROI moved

two-element numeric vector

Position after the ROI moved, specified as a two-element numeric vector of the form [x y].

Attributes:

GetAccess	public
SetAccess	private
GetObservable	true
SetObservable	true

Data Types: char

Examples

Access Event Data

This callback function gets the event source object handle, the event name, and other properties from the images.roi.ROIMovingEventData object passed to it when the event is triggered.

function myCallbk(s,evtData)
   eventSource = evtData.Source;
   eventName = evtData.EventName;
   previousPosition = evtData.PreviousPosition;
   currentPosition = evtData.CurrentPosition; 
end

Version History

Introduced in R2018b