DrawingObserver

java.lang.Object
- observer.DrawingObserver

All Implemented Interfaces:: java.beans.PropertyChangeListener, java.util.EventListener

public class DrawingObserver
extends java.lang.Object
implements java.beans.PropertyChangeListener

Field Summary

Fields
Modifier and Type Field Description

(package private) DrawingFrame frame

Constructor Summary

Constructors
Constructor Description

DrawingObserver(DrawingFrame frame)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addListener(javax.swing.JButton button, java.awt.event.MouseAdapter adapter)`	Method that add listener to some button and enable it.
`void`	`propertyChange(java.beans.PropertyChangeEvent evt)`	Listen to changes from `DrawingModel` that sends Subject - `DrawingController` to update buttons depend on state of draw in `DrawingFrame`.
`void`	`removeListener(javax.swing.JButton button, java.awt.event.MouseAdapter adapter)`	Method that remove listener from some button and disable it.

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

- Field Detail
  - frame
```
DrawingFrame frame
```
- Constructor Detail
  - DrawingObserver
```
public DrawingObserver(DrawingFrame frame)
```
- Method Detail
  - addListener
```
public void addListener(javax.swing.JButton button,
                        java.awt.event.MouseAdapter adapter)
```
    Method that add listener to some button and enable it.
    
    Parameters:
    
    button - Represent button which need to be updated.
    
    adapter - Represent adapter for that button.
  - removeListener
```
public void removeListener(javax.swing.JButton button,
                           java.awt.event.MouseAdapter adapter)
```
    Method that remove listener from some button and disable it.
    
    Parameters:
    
    button - Represent button which need to be updated.
    
    adapter - Represent adapter for that button.
  - propertyChange
```
public void propertyChange(java.beans.PropertyChangeEvent evt)
```
    Listen to changes from DrawingModel that sends Subject - DrawingController to update buttons depend on state of draw in DrawingFrame.
    
    Specified by:
    
    propertyChange in interface java.beans.PropertyChangeListener