images.roi.ROIClickedEventData class

Package: images.roi

Event data passed when ROI is clicked

Description

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

The images.roi.ROIClickedEventData 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.ROIClickedEventData object when called to trigger an event. images.roi.ROIClickedEventData does not accept input arguments.

Properties

Source — Event source

object

Event source object, 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

SelectionType — Type of selection

character vector

Type of selection, specified as one of the following character vectors.

SelectionType Value	Description
'left'	Left mouse-click
'right'	Right mouse-click
'double'	Double-click
'shift'	Shift-left mouse-click
'ctrl'	Control-left mouse-click

Attributes:

GetAccess	public
SetAccess	private
GetObservable	true
SetObservable	true

SelectedPart — Part of ROI that was clicked

character vector

Part of the ROI that was clicked, specified as one of the character vectors in this table.

SelectedPart Value	Description
'edge'	Clicked edge of ROI.
'face'	Clicked face of ROI.
'label'	Clicked ROI label.
'marker'	Clicked marker used to reshape the ROI.

Attributes:

GetAccess	public
SetAccess	private
GetObservable	true
SetObservable	true

CurrentSelected — ROI is currently selected

logical scalar

ROI is currently selected, specified as a logical scalar. Returns 1 when the ROI is selected, otherwise, 0. To deselect an ROI, use Ctrl-click.

Attributes:

GetAccess	public
SetAccess	private
GetObservable	true
SetObservable	true

PreviousSelected — ROI was previously selected

logical scalar

ROI was previously selected, specified as a logical scalar. Returns 1 when the ROI was already selected and 0 when the ROI was not previously selected.

Attributes:

GetAccess	public
SetAccess	private
GetObservable	true
SetObservable	true

Examples

Access Event Data

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

function myCallbk(s,evtData)
   eventSource = evtData.Source;
   eventName = evtData.EventName;
   selectionType = evtData.SelectionType;
   selectedPart = evtData.SelectedPart;
   currselected = evtData.CurrentSelected;
   prevselected = evtData.PreviousSelected;
end

Version History

Introduced in R2018b