EventListener (ImageJ API)

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java.lang.Object
- ij.plugin.EventListener

All Implemented Interfaces:

CommandListener, RoiListener, IJEventListener, ImageListener, PlugIn
```
public class EventListener
extends Object
implements PlugIn, IJEventListener, ImageListener, RoiListener, CommandListener
```
This plugin implements the Plugins/Utilities/Monitor Events command. By implementing the IJEventListener, CommandListener, ImageListener and RoiListener interfaces, it is able to monitor foreground and background color changes, tool switches, Log window closings, command executions, image window openings, closings and updates, and ROI changes.

Field Summary
- Fields inherited from interface ij.IJEventListener
  BACKGROUND_COLOR_CHANGED, COLOR_PICKER_CLOSED, FOREGROUND_COLOR_CHANGED, LOG_WINDOW_CLOSED, TOOL_CHANGED
- Fields inherited from interface ij.gui.RoiListener
  COMPLETED, CREATED, DELETED, EXTENDED, MODIFIED, MOVED

Constructor Summary

Constructors
Constructor Description

EventListener()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`commandExecuting(String command)`
`void`	`eventOccurred(int eventID)`
`void`	`imageClosed(ImagePlus imp)`
`void`	`imageOpened(ImagePlus imp)`
`void`	`imageUpdated(ImagePlus imp)`
`void`	`roiModified(ImagePlus img, int id)`
`void`	`run(String arg)`	This method is called when the plugin is loaded.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - EventListener
```
public EventListener()
```
- Method Detail
  - run
```
public void run(String arg)
```
    Description copied from interface: PlugIn
    
    This method is called when the plugin is loaded. 'arg', which may be blank, is the argument specified for this plugin in IJ_Props.txt.
    
    Specified by:
    
    run in interface PlugIn
  - eventOccurred
```
public void eventOccurred(int eventID)
```
    Specified by:
    
    eventOccurred in interface IJEventListener
  - imageOpened
```
public void imageOpened(ImagePlus imp)
```
    Specified by:
    
    imageOpened in interface ImageListener
  - imageClosed
```
public void imageClosed(ImagePlus imp)
```
    Specified by:
    
    imageClosed in interface ImageListener
  - imageUpdated
```
public void imageUpdated(ImagePlus imp)
```
    Specified by:
    
    imageUpdated in interface ImageListener
  - commandExecuting
```
public String commandExecuting(String command)
```
    Specified by:
    
    commandExecuting in interface CommandListener
  - roiModified
```
public void roiModified(ImagePlus img,
                        int id)
```
    Specified by:
    
    roiModified in interface RoiListener

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