/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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 Lesser General Public License for more details.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.metadata.propertyeditors;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.beans.PropertyEditor;
import org.pentaho.reporting.engine.classic.core.style.FontSmooth;
import org.pentaho.reporting.engine.classic.core.util.beans.BeanException;
import org.pentaho.reporting.engine.classic.core.util.beans.FontSmoothValueConverter;
import org.pentaho.reporting.libraries.base.util.StringUtils;
/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class FontSmoothPropertyEditor implements PropertyEditor
{
private FontSmoothValueConverter valueConverter;
private FontSmooth value;
private PropertyChangeSupport propertyChangeSupport;
public FontSmoothPropertyEditor()
{
propertyChangeSupport = new PropertyChangeSupport(this);
valueConverter = new FontSmoothValueConverter();
}
/**
* Set (or change) the object that is to be edited. Primitive types such as "int" must be wrapped as the
* corresponding object type such as "java.lang.Integer".
*
* @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(final Object value)
{
final Object oldValue = this.value;
if (FontSmooth.AUTO.equals(value))
{
this.value = FontSmooth.AUTO;
}
else if (FontSmooth.ALWAYS.equals(value))
{
this.value = FontSmooth.ALWAYS;
}
else if (FontSmooth.NEVER.equals(value))
{
this.value = FontSmooth.NEVER;
}
else
{
this.value = null;
}
propertyChangeSupport.firePropertyChange(null, oldValue, this.value);
}
/**
* Gets the property value.
*
* @return The value of the property. Primitive types such as "int" will be wrapped as the corresponding object type
* such as "java.lang.Integer".
*/
public Object getValue()
{
return value;
}
/**
* Determines whether this property editor is paintable.
*
* @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.
* <p/>
* The given Graphics object will have the default font, color, etc of the parent container. The PropertyEditor may
* change graphics attributes such as font and color and doesn't need to restore the old values.
*
* @param gfx Graphics object to paint into.
* @param box Rectangle within graphics object into which we should paint.
*/
public void paintValue(final Graphics gfx, final Rectangle box)
{
}
/**
* Returns a fragment of Java code that can be used to set a property to match the editors current state. This method
* is intended for use when generating Java code to reflect changes made through the property editor.
* <p/>
* The code fragment should be context free and must be a legal Java expression as specified by the JLS.
* <p/>
* Specifically, if the expression represents a computation then all classes and static members should be fully
* qualified. This rule applies to constructors, static methods and non primitive arguments.
* <p/>
* Caution should be used when evaluating the expression as it may throw exceptions. In particular, code generators
* must ensure that generated code will compile in the presence of an expression that can throw checked exceptions.
* <p/>
* Example results are: <ul> <li>Primitive expresssion: <code>2</code> <li>Class constructor: <code>new
* java.awt.Color(127,127,34)</code> <li>Static field: <code>java.awt.Color.orange</code> <li>Static method:
* <code>javax.swing.Box.createRigidArea(new java.awt.Dimension(0, 5))</code> </ul>
*
* @return a fragment of Java code representing an initializer for the current value. It should not contain a
* semi-colon ('<code>;</code>') to end the expression.
*/
public String getJavaInitializationString()
{
if (FontSmooth.ALWAYS.equals(value))
{
return FontSmooth.class.getName() + ".ALWAYS";
}
else if (FontSmooth.AUTO.equals(value))
{
return FontSmooth.class.getName() + ".AUTO";
}
else if (FontSmooth.NEVER.equals(value))
{
return FontSmooth.class.getName() + ".NEVER";
}
else
{
return "null";
}
}
/**
* Gets the property value as text.
*
* @return The property value as a human editable string. <p> Returns null if the value can't be expressed as an
* editable 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()
{
if (value == null)
{
return null;
}
try
{
return valueConverter.toAttributeValue(value);
}
catch (BeanException e)
{
return null;
}
}
/**
* Set 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(final String text) throws IllegalArgumentException
{
if (StringUtils.isEmpty(text))
{
setValue(null);
return;
}
try
{
setValue(valueConverter.toPropertyValue(text));
}
catch (BeanException e)
{
throw new IllegalArgumentException("This is not a valid property-value");
}
}
/**
* If the property value must be one of a set of known tagged values, then this method should return an array of the
* tags. 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 and the use of getAsText to identify
* the current 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 new String[]{
FontSmooth.AUTO.toString(),
FontSmooth.ALWAYS.toString(),
FontSmooth.NEVER.toString(),
};
}
/**
* A PropertyEditor may choose 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 Component getCustomEditor()
{
return null;
}
/**
* Determines whether this property editor supports a custom editor.
*
* @return True if the propertyEditor can provide a custom editor.
*/
public boolean supportsCustomEditor()
{
return false;
}
/**
* Register a listener for the PropertyChange event. When a PropertyEditor changes its value it should fire a
* PropertyChange event on all registered PropertyChangeListeners, specifying the null value for the property name and
* itself as the source.
*
* @param listener An object to be invoked when a PropertyChange event is fired.
*/
public void addPropertyChangeListener(final PropertyChangeListener listener)
{
propertyChangeSupport.addPropertyChangeListener(listener);
}
/**
* Remove a listener for the PropertyChange event.
*
* @param listener The PropertyChange listener to be removed.
*/
public void removePropertyChangeListener(final PropertyChangeListener listener)
{
propertyChangeSupport.removePropertyChangeListener(listener);
}
}