/
ReorderbleList.java
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/
ReorderbleList.java
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package example;
// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.io.*;
import java.util.*;
import java.util.stream.IntStream;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
public class ReorderbleList<E extends ListItem> extends JList<E> {
private static final AlphaComposite ALPHA = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, .1f);
private transient MouseInputListener rbl;
private Color rubberBandColor;
protected final Path2D rubberBand = new Path2D.Double();
public ReorderbleList(ListModel<E> model) {
super(model);
}
@Override public void updateUI() {
setSelectionForeground(null); // Nimbus
setSelectionBackground(null); // Nimbus
setCellRenderer(null);
setTransferHandler(null);
removeMouseListener(rbl);
removeMouseMotionListener(rbl);
super.updateUI();
rubberBandColor = makeRubberBandColor(getSelectionBackground());
setLayoutOrientation(JList.HORIZONTAL_WRAP);
setVisibleRowCount(0);
setFixedCellWidth(62);
setFixedCellHeight(62);
setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
setCellRenderer(new ListItemListCellRenderer<>());
rbl = new RubberBandingListener();
addMouseMotionListener(rbl);
addMouseListener(rbl);
// putClientProperty("List.isFileList", Boolean.TRUE);
getSelectionModel().setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
setTransferHandler(new ListItemTransferHandler());
setDropMode(DropMode.INSERT);
}
@Override protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (getDragEnabled()) {
return;
}
Graphics2D g2 = (Graphics2D) g.create();
g2.setPaint(getSelectionBackground());
g2.draw(rubberBand);
g2.setComposite(ALPHA);
g2.setPaint(rubberBandColor);
g2.fill(rubberBand);
g2.dispose();
}
private static Color makeRubberBandColor(Color c) {
int r = c.getRed();
int g = c.getGreen();
int b = c.getBlue();
return r > g ? r > b ? new Color(r, 0, 0) : new Color(0, 0, b)
: g > b ? new Color(0, g, 0) : new Color(0, 0, b);
}
protected final Path2D getRubberBand() {
return rubberBand;
}
private class RubberBandingListener extends MouseInputAdapter {
private final Point srcPoint = new Point();
@Override public void mouseDragged(MouseEvent e) {
JList<?> l = (JList<?>) e.getComponent();
if (l.getDragEnabled()) {
return;
}
Point destPoint = e.getPoint();
Path2D rb = getRubberBand();
rb.reset();
rb.moveTo(srcPoint.x, srcPoint.y);
rb.lineTo(destPoint.x, srcPoint.y);
rb.lineTo(destPoint.x, destPoint.y);
rb.lineTo(srcPoint.x, destPoint.y);
rb.closePath();
// JDK 1.7.0: l.setSelectedIndices(getIntersectsIcons(l, rubberBand));
l.setSelectedIndices(IntStream.range(0, l.getModel().getSize()).filter(i -> rb.intersects(l.getCellBounds(i, i))).toArray());
l.repaint();
}
@Override public void mouseReleased(MouseEvent e) {
JList<?> l = (JList<?>) e.getComponent();
l.setFocusable(true);
// if (Objects.isNull(srcPoint) || !getDragEnabled()) {
// Component glassPane = l.getRootPane().getGlassPane();
// glassPane.setVisible(false);
// }
getRubberBand().reset();
l.setDragEnabled(l.getSelectedIndices().length > 0);
l.repaint();
}
@Override public void mousePressed(MouseEvent e) {
JList<?> l = (JList<?>) e.getComponent();
int index = l.locationToIndex(e.getPoint());
Rectangle rect = l.getCellBounds(index, index);
if (rect.contains(e.getPoint())) {
l.setFocusable(true);
if (l.getDragEnabled()) {
return;
}
// System.out.println("ccc:" + startSelectedIndex);
l.setSelectedIndex(index);
} else {
l.clearSelection();
l.getSelectionModel().setAnchorSelectionIndex(-1);
l.getSelectionModel().setLeadSelectionIndex(-1);
l.setFocusable(false);
l.setDragEnabled(false);
}
srcPoint.setLocation(e.getPoint());
l.repaint();
}
// // JDK 1.7.0
// private static int[] getIntersectsIcons(JList<?> l, Shape rect) {
// ListModel model = l.getModel();
// List<Integer> ll = new ArrayList<>(model.getSize());
// for (int i = 0; i < model.getSize(); i++) {
// if (rect.intersects(l.getCellBounds(i, i))) {
// ll.add(i);
// }
// }
// // JDK 1.8.0: return ll.stream().mapToInt(Integer::intValue).toArray();
// int[] il = new int[ll.size()];
// for (int i = 0; i < ll.size(); i++) {
// il[i] = ll.get(i);
// }
// return il;
// }
}
}
class SelectedImageFilter extends RGBImageFilter {
// public SelectedImageFilter() {
// canFilterIndexColorModel = false;
// }
@Override public int filterRGB(int x, int y, int argb) {
// Color color = new Color(argb, true);
// float[] array = new float[4];
// color.getComponents(array);
// return new Color(array[0], array[1], array[2] * .5f, array[3]).getRGB();
return (argb & 0xFFFFFF00) | ((argb & 0xFF) >> 1);
}
}
// class DotBorder extends EmptyBorder {
// protected DotBorder(Insets borderInsets) {
// super(borderInsets);
// }
// protected DotBorder(int top, int left, int bottom, int right) {
// super(top, left, bottom, right);
// }
// @Override public boolean isBorderOpaque() {
// return true;
// }
// @Override public void paintBorder(Component c, Graphics g, int x, int y, int w, int h) {
// Graphics2D g2 = (Graphics2D) g.create();
// g2.translate(x, y);
// g2.setPaint(new Color(~SystemColor.activeCaption.getRGB()));
// // new Color(200, 150, 150));
// // g2.setStroke(dashed);
// // g2.drawRect(0, 0, w - 1, h - 1);
// BasicGraphicsUtils.drawDashedRect(g2, 0, 0, w, h);
// g2.dispose();
// }
// // @Override public Insets getBorderInsets(Component c)
// // @Override public Insets getBorderInsets(Component c, Insets insets)
// }
class ListItemListCellRenderer<E extends ListItem> implements ListCellRenderer<E> {
private final JPanel renderer = new JPanel(new BorderLayout());
private final JLabel icon = new JLabel((Icon) null, SwingConstants.CENTER);
private final JLabel label = new JLabel("", SwingConstants.CENTER);
// private final Border dotBorder = new DotBorder(2, 2, 2, 2);
// private final Border empBorder = BorderFactory.createEmptyBorder(2, 2, 2, 2);
private final Border focusBorder = UIManager.getBorder("List.focusCellHighlightBorder");
private final Border noFocusBorder; // = UIManager.getBorder("List.noFocusBorder");
protected ListItemListCellRenderer() {
Border b = UIManager.getBorder("List.noFocusBorder");
if (Objects.isNull(b)) { // Nimbus???
Insets i = focusBorder.getBorderInsets(label);
b = BorderFactory.createEmptyBorder(i.top, i.left, i.bottom, i.right);
}
noFocusBorder = b;
icon.setOpaque(false);
label.setForeground(renderer.getForeground());
label.setBackground(renderer.getBackground());
label.setBorder(noFocusBorder);
renderer.setOpaque(false);
renderer.setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
renderer.add(icon);
renderer.add(label, BorderLayout.SOUTH);
}
@Override public Component getListCellRendererComponent(JList<? extends E> list, E value, int index, boolean isSelected, boolean cellHasFocus) {
label.setText(value.title);
// label.setBorder(cellHasFocus ? dotBorder : empBorder);
label.setBorder(cellHasFocus ? focusBorder : noFocusBorder);
if (isSelected) {
icon.setIcon(value.sicon);
label.setForeground(list.getSelectionForeground());
label.setBackground(list.getSelectionBackground());
label.setOpaque(true);
} else {
icon.setIcon(value.nicon);
label.setForeground(list.getForeground());
label.setBackground(list.getBackground());
label.setOpaque(false);
}
return renderer;
}
}
class ListItem implements Serializable {
private static final long serialVersionUID = 1L;
public final ImageIcon nicon;
public final ImageIcon sicon;
public final String title;
protected ListItem(String title, String iconfile) {
this.nicon = new ImageIcon(getClass().getResource(iconfile));
ImageProducer ip = new FilteredImageSource(nicon.getImage().getSource(), new SelectedImageFilter());
this.sicon = new ImageIcon(Toolkit.getDefaultToolkit().createImage(ip));
this.title = title;
}
}