/* * Copyright (c) 1996, 2007, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package java.beans;import java.beans.*;/** * This is a support class to help build property editors. * <p> * It can be used either as a base class or as a delagatee. */public class PropertyEditorSupport implements PropertyEditor { /** * Constructs a <code>PropertyEditorSupport</code> object. * * @since 1.5 */ public PropertyEditorSupport() { setSource(this); } /** * Constructs a <code>PropertyEditorSupport</code> object. * * @param source the source used for event firing * @since 1.5 */ public PropertyEditorSupport(Object source) { if (source == null) { throw new NullPointerException(); } setSource(source); } /** * Returns the bean that is used as the * source of events. If the source has not * been explicitly set then this instance of * <code>PropertyEditorSupport</code> is returned. * * @return the source object or this instance * @since 1.5 */ public Object getSource() { return source; } /** * Sets the source bean. * <p> * 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. * * @param source source object to be used for events * @since 1.5 */ public void setSource(Object source) { this.source = source; } /** * Set (or change) the object that is to be edited. * * @param 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. */ public void setValue(Object value) { this.value = value; firePropertyChange(); } /** * Gets the value of the property. * * @return The value of the property. */ public Object getValue() { return value; } //---------------------------------------------------------------------- /** * Determines whether the class will honor the paintValue method. * * @return True if the class will honor the paintValue method. */ public boolean isPaintable() { return false; } /** * 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. * <p> * If the PropertyEditor doesn't honor paint requests (see isPaintable) * this method should be a silent noop. * * @param gfx Graphics object to paint into. * @param box Rectangle within graphics object into which we should paint. */ public void paintValue(java.awt.Graphics gfx, java.awt.Rectangle box) { } //---------------------------------------------------------------------- /** * 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. * <p> * Example results are "2", "new Color(127,127,34)", "Color.orange", etc. * * @return A fragment of Java code representing an initializer for the * current value. */ public String getJavaInitializationString() { return "???"; } //---------------------------------------------------------------------- /** * Gets the property value as a string suitable for presentation * to a human to edit. * * @return The property value as a string suitable for presentation * to a human to edit. * <p> Returns null if the value can't be expressed as a string. * <p> If a non-null value is returned, then the PropertyEditor should * be prepared to parse that string back in setAsText(). */ public String getAsText() { return (this.value != null) ? this.value.toString() : null; } /** * 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. * * @param text The string to be parsed. */ public void setAsText(String text) throws java.lang.IllegalArgumentException { if (value instanceof String) { setValue(text); return; } throw new java.lang.IllegalArgumentException(text); } //---------------------------------------------------------------------- /** * 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. This can * be used to represent (for example) enum values. If a PropertyEditor * supports tags, then it should support the use of setAsText with * a tag value as a way of setting the value. * * @return The tag values for this property. May be null if this * property cannot be represented as a tagged value. * */ public String[] getTags() { return null; } //---------------------------------------------------------------------- /** * A PropertyEditor may chose to make available a full custom Component * that edits its property value. It is the responsibility of the * PropertyEditor to hook itself up to its editor Component itself and * to report property value changes by firing a PropertyChange event. * <P> * The higher-level code that calls getCustomEditor may either embed * the Component in some larger property sheet, or it may put it in * its own individual dialog, or ... * * @return A java.awt.Component that will allow a human to directly * edit the current property value. May be null if this is * not supported. */ public java.awt.Component getCustomEditor() { return null; } /** * Determines whether the propertyEditor can provide a custom editor. * * @return True if the propertyEditor can provide a custom editor. */ public boolean supportsCustomEditor() { return false; } //---------------------------------------------------------------------- /** * Adds a listener for the value change. * When the property editor changes its value * it should fire a {@link PropertyChangeEvent} * on all registered {@link PropertyChangeListener}s, * specifying the {@code null} value for the property name. * If the source property is set, * it should be used as the source of the event. * <p> * The same listener object may be added more than once, * and will be called as many times as it is added. * If {@code listener} is {@code null}, * no exception is thrown and no action is taken. * * @param listener the {@link PropertyChangeListener} to add */ public synchronized void addPropertyChangeListener( PropertyChangeListener listener) { if (listeners == null) { listeners = new java.util.Vector(); } listeners.addElement(listener); } /** * Removes a listener for the value change. * <p> * If the same listener was added more than once, * it will be notified one less time after being removed. * If {@code listener} is {@code null}, or was never added, * no exception is thrown and no action is taken. * * @param listener the {@link PropertyChangeListener} to remove */ public synchronized void removePropertyChangeListener( PropertyChangeListener listener) { if (listeners == null) { return; } listeners.removeElement(listener); } /** * Report that we have been modified to any interested listeners. */ public void firePropertyChange() { java.util.Vector targets; synchronized (this) { if (listeners == null) { return; } targets = (java.util.Vector) listeners.clone(); } // Tell our listeners that "everything" has changed. PropertyChangeEvent evt = new PropertyChangeEvent(source, null, null, null); for (int i = 0; i < targets.size(); i++) { PropertyChangeListener target = (PropertyChangeListener)targets.elementAt(i); target.propertyChange(evt); } } //---------------------------------------------------------------------- private Object value; private Object source; private java.util.Vector listeners;}
/*
* Copyright (c) 1996, 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.beans;
import java.beans.*;
/**
* This is a support class to help build property editors.
* <p>
* It can be used either as a base class or as a delagatee.
*/
public class PropertyEditorSupport implements PropertyEditor {
/**
* Constructs a <code>PropertyEditorSupport</code> object.
*
* @since 1.5
*/
public PropertyEditorSupport() {
setSource(this);
}
/**
* Constructs a <code>PropertyEditorSupport</code> object.
*
* @param source the source used for event firing
* @since 1.5
*/
public PropertyEditorSupport(Object source) {
if (source == null) {
throw new NullPointerException();
}
setSource(source);
}
/**
* Returns the bean that is used as the
* source of events. If the source has not
* been explicitly set then this instance of
* <code>PropertyEditorSupport</code> is returned.
*
* @return the source object or this instance
* @since 1.5
*/
public Object getSource() {
return source;
}
/**
* Sets the source bean.
* <p>
* 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.
*
* @param source source object to be used for events
* @since 1.5
*/
public void setSource(Object source) {
this.source = source;
}
/**
* Set (or change) the object that is to be edited.
*
* @param 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.
*/
public void setValue(Object value) {
this.value = value;
firePropertyChange();
}
/**
* Gets the value of the property.
*
* @return The value of the property.
*/
public Object getValue() {
return value;
}
//----------------------------------------------------------------------
/**
* Determines whether the class will honor the paintValue method.
*
* @return True if the class will honor the paintValue method.
*/
public boolean isPaintable() {
return false;
}
/**
* 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.
* <p>
* If the PropertyEditor doesn't honor paint requests (see isPaintable)
* this method should be a silent noop.
*
* @param gfx Graphics object to paint into.
* @param box Rectangle within graphics object into which we should paint.
*/
public void paintValue(java.awt.Graphics gfx, java.awt.Rectangle box) {
}
//----------------------------------------------------------------------
/**
* 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.
* <p>
* Example results are "2", "new Color(127,127,34)", "Color.orange", etc.
*
* @return A fragment of Java code representing an initializer for the
* current value.
*/
public String getJavaInitializationString() {
return "???";
}
//----------------------------------------------------------------------
/**
* Gets the property value as a string suitable for presentation
* to a human to edit.
*
* @return The property value as a string suitable for presentation
* to a human to edit.
* <p> Returns null if the value can't be expressed as a string.
* <p> If a non-null value is returned, then the PropertyEditor should
* be prepared to parse that string back in setAsText().
*/
public String getAsText() {
return (this.value != null)
? this.value.toString()
: null;
}
/**
* 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.
*
* @param text The string to be parsed.
*/
public void setAsText(String text) throws java.lang.IllegalArgumentException {
if (value instanceof String) {
setValue(text);
return;
}
throw new java.lang.IllegalArgumentException(text);
}
//----------------------------------------------------------------------
/**
* 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. This can
* be used to represent (for example) enum values. If a PropertyEditor
* supports tags, then it should support the use of setAsText with
* a tag value as a way of setting the value.
*
* @return The tag values for this property. May be null if this
* property cannot be represented as a tagged value.
*
*/
public String[] getTags() {
return null;
}
//----------------------------------------------------------------------
/**
* A PropertyEditor may chose to make available a full custom Component
* that edits its property value. It is the responsibility of the
* PropertyEditor to hook itself up to its editor Component itself and
* to report property value changes by firing a PropertyChange event.
* <P>
* The higher-level code that calls getCustomEditor may either embed
* the Component in some larger property sheet, or it may put it in
* its own individual dialog, or ...
*
* @return A java.awt.Component that will allow a human to directly
* edit the current property value. May be null if this is
* not supported.
*/
public java.awt.Component getCustomEditor() {
return null;
}
/**
* Determines whether the propertyEditor can provide a custom editor.
*
* @return True if the propertyEditor can provide a custom editor.
*/
public boolean supportsCustomEditor() {
return false;
}
//----------------------------------------------------------------------
/**
* Adds a listener for the value change.
* When the property editor changes its value
* it should fire a {@link PropertyChangeEvent}
* on all registered {@link PropertyChangeListener}s,
* specifying the {@code null} value for the property name.
* If the source property is set,
* it should be used as the source of the event.
* <p>
* The same listener object may be added more than once,
* and will be called as many times as it is added.
* If {@code listener} is {@code null},
* no exception is thrown and no action is taken.
*
* @param listener the {@link PropertyChangeListener} to add
*/
public synchronized void addPropertyChangeListener(
PropertyChangeListener listener) {
if (listeners == null) {
listeners = new java.util.Vector();
}
listeners.addElement(listener);
}
/**
* Removes a listener for the value change.
* <p>
* If the same listener was added more than once,
* it will be notified one less time after being removed.
* If {@code listener} is {@code null}, or was never added,
* no exception is thrown and no action is taken.
*
* @param listener the {@link PropertyChangeListener} to remove
*/
public synchronized void removePropertyChangeListener(
PropertyChangeListener listener) {
if (listeners == null) {
return;
}
listeners.removeElement(listener);
}
/**
* Report that we have been modified to any interested listeners.
*/
public void firePropertyChange() {
java.util.Vector targets;
synchronized (this) {
if (listeners == null) {
return;
}
targets = (java.util.Vector) listeners.clone();
}
// Tell our listeners that "everything" has changed.
PropertyChangeEvent evt = new PropertyChangeEvent(source, null, null, null);
for (int i = 0; i < targets.size(); i++) {
PropertyChangeListener target = (PropertyChangeListener)targets.elementAt(i);
target.propertyChange(evt);
}
}
//----------------------------------------------------------------------
private Object value;
private Object source;
private java.util.Vector listeners;
}