A component for choosing a stroke from a list of available strokes.
/*
* JCommon : a free general purpose class library for the Java(tm) platform
*
*
* (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -----------------------
* StrokeChooserPanel.java
* -----------------------
* (C) Copyright 2000-2009, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): Dirk Zeitz;
*
* $Id: StrokeChooserPanel.java,v 1.8 2009/02/27 13:58:41 mungady Exp $
*
* Changes (from 26-Oct-2001)
* --------------------------
* 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
* 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
* 16-Mar-2004 : Fix for focus problems (DZ);
* 27-Feb-2009 : Fixed bug 2612649, NullPointerException (DG);
*
*/
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.RenderingHints;
import java.awt.Stroke;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.ListCellRenderer;
/**
* A component for choosing a stroke from a list of available strokes.
*
* @author David Gilbert
*/
public class StrokeChooserPanel extends JPanel {
/** A combo for selecting the stroke. */
private JComboBox selector;
/**
* Creates a panel containing a combo-box that allows the user to select
* one stroke from a list of available strokes.
*
* @param current the current stroke sample.
* @param available an array of 'available' stroke samples.
*/
public StrokeChooserPanel(StrokeSample current, StrokeSample[] available) {
setLayout(new BorderLayout());
// we've changed the behaviour here to populate the combo box
// with Stroke objects directly - ideally we'd change the signature
// of the constructor too...maybe later.
DefaultComboBoxModel model = new DefaultComboBoxModel();
for (int i = 0; i < available.length; i++) {
model.addElement(available[i].getStroke());
}
this.selector = new JComboBox(model);
this.selector.setSelectedItem(current.getStroke());
this.selector.setRenderer(new StrokeSample(null));
add(this.selector);
// Changes due to focus problems!! DZ
this.selector.addActionListener(new ActionListener() {
public void actionPerformed(final ActionEvent evt) {
getSelector().transferFocus();
}
});
}
/**
* Returns the selector component.
*
* @return Returns the selector.
*/
protected final JComboBox getSelector() {
return this.selector;
}
/**
* Returns the selected stroke.
*
* @return The selected stroke (possibly <code>null</code>).
*/
public Stroke getSelectedStroke() {
return (Stroke) this.selector.getSelectedItem();
}
}
/*
* JCommon : a free general purpose class library for the Java(tm) platform
*
*
* (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -----------------
* StrokeSample.java
* -----------------
* (C) Copyright 2000-2009, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: StrokeSample.java,v 1.5 2009/02/27 13:58:41 mungady Exp $
*
* Changes (from 26-Oct-2001)
* --------------------------
* 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
* 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
* 21-Mar-2003 : Fixed null pointer exception, bug 705126 (DG);
*
*/
/**
* A panel that displays a stroke sample.
*
* @author David Gilbert
*/
class StrokeSample extends JComponent implements ListCellRenderer {
/** The stroke being displayed (may be null). */
private Stroke stroke;
/** The preferred size of the component. */
private Dimension preferredSize;
/**
* Creates a StrokeSample for the specified stroke.
*
* @param stroke the sample stroke (<code>null</code> permitted).
*/
public StrokeSample(final Stroke stroke) {
this.stroke = stroke;
this.preferredSize = new Dimension(80, 18);
setPreferredSize(this.preferredSize);
}
/**
* Returns the current Stroke object being displayed.
*
* @return The stroke (possibly <code>null</code>).
*/
public Stroke getStroke() {
return this.stroke;
}
/**
* Sets the stroke object being displayed and repaints the component.
*
* @param stroke the stroke (<code>null</code> permitted).
*/
public void setStroke(final Stroke stroke) {
this.stroke = stroke;
repaint();
}
/**
* Returns the preferred size of the component.
*
* @return the preferred size of the component.
*/
public Dimension getPreferredSize() {
return this.preferredSize;
}
/**
* Draws a line using the sample stroke.
*
* @param g the graphics device.
*/
public void paintComponent(final Graphics g) {
final Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
final Dimension size = getSize();
final Insets insets = getInsets();
final double xx = insets.left;
final double yy = insets.top;
final double ww = size.getWidth() - insets.left - insets.right;
final double hh = size.getHeight() - insets.top - insets.bottom;
// calculate point one
final Point2D one = new Point2D.Double(xx + 6, yy + hh / 2);
// calculate point two
final Point2D two = new Point2D.Double(xx + ww - 6, yy + hh / 2);
// draw a circle at point one
final Ellipse2D circle1 = new Ellipse2D.Double(one.getX() - 5,
one.getY() - 5, 10, 10);
final Ellipse2D circle2 = new Ellipse2D.Double(two.getX() - 6,
two.getY() - 5, 10, 10);
// draw a circle at point two
g2.draw(circle1);
g2.fill(circle1);
g2.draw(circle2);
g2.fill(circle2);
// draw a line connecting the points
final Line2D line = new Line2D.Double(one, two);
if (this.stroke != null) {
g2.setStroke(this.stroke);
g2.draw(line);
}
}
/**
* Returns a list cell renderer for the stroke, so the sample can be
* displayed in a list or combo.
*
* @param list the list.
* @param value the value.
* @param index the index.
* @param isSelected selected?
* @param cellHasFocus focussed?
*
* @return the component for rendering.
*/
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
if (value instanceof Stroke) {
setStroke((Stroke) value);
}
else {
setStroke(null);
}
return this;
}
}
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