/* An icon that renders the value of an attribute of the container.
Copyright (c) 1999-2008 The Regents of the University of California.
All rights reserved.
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the above
copyright notice and the following two paragraphs appear in all copies
of this software.
IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
ENHANCEMENTS, OR MODIFICATIONS.
PT_COPYRIGHT_VERSION_2
COPYRIGHTENDKEY
*/
package ptolemy.vergil.icon;
import java.awt.Font;
import java.awt.geom.Rectangle2D;
import javax.swing.SwingConstants;
import ptolemy.data.IntToken;
import ptolemy.data.expr.Parameter;
import ptolemy.data.type.BaseType;
import ptolemy.kernel.util.Attribute;
import ptolemy.kernel.util.IllegalActionException;
import ptolemy.kernel.util.NameDuplicationException;
import ptolemy.kernel.util.NamedObj;
import ptolemy.kernel.util.Settable;
import ptolemy.kernel.util.StringAttribute;
import ptolemy.util.StringUtilities;
import diva.canvas.CompositeFigure;
import diva.canvas.Figure;
import diva.canvas.toolbox.LabelFigure;
//////////////////////////////////////////////////////////////////////////
//// AttributeValueIcon
/**
An icon that displays the value of an attribute of the container.
The attribute is assumed to be an instance of Settable, and its name
is given by the parameter <i>attributeName</i>. The display is not
automatically updated when the attribute value is updated.
@author Edward A. Lee
@version $Id: AttributeValueIcon.java,v 1.46.4.1 2008/03/25 22:32:10 cxh Exp $
@since Ptolemy II 2.0
@Pt.ProposedRating Yellow (eal)
@Pt.AcceptedRating Red (johnr)
*/
public class AttributeValueIcon extends XMLIcon {
/** Create a new icon with the given name in the given container.
* The container is required to implement Settable, or an exception
* will be thrown.
* @param container The container for this attribute.
* @param name The name of this attribute.
* @exception IllegalActionException If thrown by the parent
* class or while setting an attribute
* @exception NameDuplicationException If the name coincides with
* an attribute already in the container.
*/
public AttributeValueIcon(NamedObj container, String name)
throws NameDuplicationException, IllegalActionException {
super(container, name);
attributeName = new StringAttribute(this, "attributeName");
displayWidth = new Parameter(this, "displayWidth");
displayWidth.setExpression("6");
displayWidth.setTypeEquals(BaseType.INT);
displayHeight = new Parameter(this, "displayHeight");
displayHeight.setExpression("1");
displayHeight.setTypeEquals(BaseType.INT);
}
///////////////////////////////////////////////////////////////////
//// parameters ////
/** The name of the attribute of the container whose value to display. */
public StringAttribute attributeName;
/** The maximum number of lines to display. This is an integer, with
* default value 1.
*/
public Parameter displayHeight;
/** The number of characters to display. This is an integer, with
* default value 6.
*/
public Parameter displayWidth;
///////////////////////////////////////////////////////////////////
//// public methods ////
/** Create a new Diva figure that visually represents this icon.
* The figure will be an instance of LabelFigure that renders the
* value of the specified attribute of the container.
* @return A new CompositeFigure consisting of the label.
*/
public Figure createFigure() {
CompositeFigure result = (CompositeFigure) super.createFigure();
String truncated = _displayString();
LabelFigure label = new LabelFigure(truncated, _labelFont, 1.0,
SwingConstants.CENTER);
Rectangle2D backBounds = result.getBackgroundFigure().getBounds();
label.translateTo(backBounds.getCenterX(), backBounds.getCenterY());
result.add(label);
_addLiveFigure(label);
return result;
}
///////////////////////////////////////////////////////////////////
//// protected methods ////
/** Get the string to render in the icon. This string is the
* expression giving the value of the attribute of the container
* having the name <i>attributeName</i>, truncated so that it is
* no longer than <i>displayWidth</i> characters. If it is truncated,
* then the string has a trailing "...". If the string is empty,
* then return a string with one space (diva fails on empty strings).
* @return The string to display, or a string with one space if none is found.
*/
protected String _displayString() {
NamedObj container = getContainer();
if (container != null) {
Attribute associatedAttribute = container
.getAttribute(attributeName.getExpression());
if (associatedAttribute instanceof Settable) {
String value = ((Settable) associatedAttribute).getExpression();
String truncated = value;
try {
int width = ((IntToken) displayWidth.getToken()).intValue();
int height = ((IntToken) displayHeight.getToken())
.intValue();
truncated = StringUtilities.truncateString(value, width,
height);
} catch (IllegalActionException ex) {
// Ignore... use whole string.
}
if (truncated.length() == 0) {
truncated = " ";
}
return truncated;
}
}
return " ";
}
///////////////////////////////////////////////////////////////////
//// protected members ////
/** The font used. */
protected static Font _labelFont = new Font("SansSerif", Font.PLAIN, 12);
}