images.roi.RectangleMovingEventData class

Package:images.roi

Event data passed when rectangle ROI is moving

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Description

Theimages.roi.RectangleMovingEventDataclass is the class passed to listeners when aRectangleROI is moving. When the ROI class triggers an event using thenotifyhandle class method, MATLAB^®assigns values to the properties of animages.roi.RectangleMovingEventDataobject and passes that object to the listener callback function (the event handler).

Theimages.roi.RectangleMovingEventDataclass is ahandleclass.

Class Attributes

`ConstructOnLoad`	`true`
`HandleCompatible`	`true`

For information on class attributes, seeClass Attributes.

Creation

Thenotifyhandle class method creates animages.roi.RectangleMovingEventDataobject when called to trigger an event.images.roi.RectangleMovingEventData不接受输入参数。

Properties

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`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`

`PreviousPosition`—Position before ROI moved
two-element numeric vector

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

Attributes:

`GetAccess`	`public`
`SetAccess`	`private`
`GetObservable`	`true`
`SetObservable`	`true`

`CurrentPosition`—Position after ROI moved
two-element numeric vector

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

Attributes:

`GetAccess`	`public`
`SetAccess`	`private`
`GetObservable`	`true`
`SetObservable`	`true`

`PreviousRotationAngle`—Orientation before ROI moved
numeric scalar

Orientation before ROI moved, specified as a numeric scalar, measured in degrees.

Attributes:

`GetAccess`	`public`
`SetAccess`	`private`
`GetObservable`	`true`
`SetObservable`	`true`

`CurrentRotationAngle`—Orientation after ROI moved
numeric scalar

Orientation after ROI moved, specified as a numeric scalar, measured in degrees.

Attributes:

`GetAccess`	`public`
`SetAccess`	`private`
`GetObservable`	`true`
`SetObservable`	`true`

Examples

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Access Event Data

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

functionmyCallbk(s,evtData) eventSource = evtData.Source; eventName = evtData.EventName; previousCenter = evtData.PreviousCenter; currentCenter = evtData.CurrentCenter; previousRotationAngle = evtData.PreviousRotationAngle; currentRotationAngle = evtData.CurrentRotationAngle;end

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Introduced in R2018b

images.roi.RectangleMovingEventData class

Description

Class Attributes

Creation

Properties

Source—Event sourceobject

Attributes:

EventName—Name of eventcharacter vector

Attributes:

PreviousPosition—Position before ROI movedtwo-element numeric vector

Attributes:

CurrentPosition—Position after ROI movedtwo-element numeric vector

Attributes:

PreviousRotationAngle—Orientation before ROI movednumeric scalar

Attributes:

CurrentRotationAngle—Orientation after ROI movednumeric scalar

Attributes:

Examples

Access Event Data

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See Also

`Source`—Event source
object

`EventName`—Name of event
character vector

`PreviousPosition`—Position before ROI moved
two-element numeric vector

`CurrentPosition`—Position after ROI moved
two-element numeric vector

`PreviousRotationAngle`—Orientation before ROI moved
numeric scalar

`CurrentRotationAngle`—Orientation after ROI moved
numeric scalar