java.beans

Class PropertyEditorSupport

java.lang.Object

java.beans.PropertyEditorSupport

All Implemented Interfaces:

PropertyEditor

public class PropertyEditorSupport
extends Object
implements PropertyEditor

This is a support class to help build property editors.

It can be used either as a base class or as a delagatee.

Constructor Summary

Constructors

Constructor and Description
PropertyEditorSupport() Constructs a PropertyEditorSupport object.
PropertyEditorSupport(Object source) Constructs a PropertyEditorSupport object.

Method Summary

Methods

Modifier and Type	Method and Description
void	addPropertyChangeListener(PropertyChangeListener listener) Adds a listener for the value change.
void	firePropertyChange() Report that we have been modified to any interested listeners.
String	getAsText() Gets the property value as a string suitable for presentation to a human to edit.
Component	getCustomEditor() A PropertyEditor may chose to make available a full custom Component that edits its property value.
String	getJavaInitializationString() This method is intended for use when generating Java code to set the value of the property.
Object	getSource() Returns the bean that is used as the source of events.
String[]	getTags() If the property value must be one of a set of known tagged values, then this method should return an array of the tag values.
Object	getValue() Gets the value of the property.
boolean	isPaintable() Determines whether the class will honor the paintValue method.
void	paintValue(Graphics gfx, Rectangle box) Paint a representation of the value into a given area of screen real estate.
void	removePropertyChangeListener(PropertyChangeListener listener) Removes a listener for the value change.
void	setAsText(String text) Sets the property value by parsing a given String.
void	setSource(Object source) Sets the source bean.
void	setValue(Object value) Set (or change) the object that is to be edited.
boolean	supportsCustomEditor() Determines whether the propertyEditor can provide a custom editor.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PropertyEditorSupport

public PropertyEditorSupport()

Constructs a PropertyEditorSupport object.

Since:

1.5

PropertyEditorSupport

public PropertyEditorSupport(Object source)

Constructs a PropertyEditorSupport object.

Parameters:

source - the source used for event firing

Since:

1.5

Method Detail

getSource

public Object getSource()

Returns the bean that is used as the source of events. If the source has not been explicitly set then this instance of PropertyEditorSupport is returned.

Returns:

the source object or this instance

Since:

1.5

setSource

public void setSource(Object source)

Sets the source bean.

The source bean is used as the source of events for the property changes. This source should be used for information purposes only and should not be modified by the PropertyEditor.

Parameters:

source - source object to be used for events

Since:

1.5

setValue

public void setValue(Object value)

Set (or change) the object that is to be edited.

Specified by:

setValue in interface PropertyEditor

Parameters:

value - The new target object to be edited. Note that this object should not be modified by the PropertyEditor, rather the PropertyEditor should create a new object to hold any modified value.

getValue

public Object getValue()

Gets the value of the property.

Specified by:

getValue in interface PropertyEditor

Returns:

The value of the property.

isPaintable

public boolean isPaintable()

Determines whether the class will honor the paintValue method.

Specified by:

isPaintable in interface PropertyEditor

Returns:

True if the class will honor the paintValue method.

paintValue

public void paintValue(Graphics gfx,
              Rectangle box)

Paint a representation of the value into a given area of screen real estate. Note that the propertyEditor is responsible for doing its own clipping so that it fits into the given rectangle.

If the PropertyEditor doesn't honor paint requests (see isPaintable) this method should be a silent noop.

Specified by:

paintValue in interface PropertyEditor

Parameters:

gfx - Graphics object to paint into.

box - Rectangle within graphics object into which we should paint.

getJavaInitializationString

public String getJavaInitializationString()

This method is intended for use when generating Java code to set the value of the property. It should return a fragment of Java code that can be used to initialize a variable with the current property value.

Example results are "2", "new Color(127,127,34)", "Color.orange", etc.

Specified by:

getJavaInitializationString in interface PropertyEditor

Returns:

A fragment of Java code representing an initializer for the current value.

getAsText

public String getAsText()

Gets the property value as a string suitable for presentation to a human to edit.

Specified by:

getAsText in interface PropertyEditor

Returns:

The property value as a string suitable for presentation to a human to edit.

Returns null if the value can't be expressed as a string.

If a non-null value is returned, then the PropertyEditor should be prepared to parse that string back in setAsText().

setAsText

public void setAsText(String text)
               throws IllegalArgumentException

Sets the property value by parsing a given String. May raise java.lang.IllegalArgumentException if either the String is badly formatted or if this kind of property can't be expressed as text.

Specified by: