public void mouseEntered(MouseEvent evt) {
if (list != null) {
TransferHandler th1 = getFileChooser().getTransferHandler();
TransferHandler th2 = list.getTransferHandler();
if (th1 != th2) {
list.setTransferHandler(th1);
}
if (getFileChooser().getDragEnabled() != list.getDragEnabled()) {
list.setDragEnabled(getFileChooser().getDragEnabled());
}
}
}
public ExampleField(ExampleOption option) {
super(option);
model = new DefaultListModel();
model.addListDataListener(
new ListDataListener() {
@Override
public void intervalAdded(ListDataEvent e) {
fireChangeEvent();
}
@Override
public void intervalRemoved(ListDataEvent e) {
fireChangeEvent();
}
@Override
public void contentsChanged(ListDataEvent e) {
fireChangeEvent();
}
});
final JList list =
new JList(model) {
@Override
public Dimension getPreferredScrollableViewportSize() {
return new Dimension(3 * CELL_SIZE, 2 * CELL_SIZE);
}
};
list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
list.setVisibleRowCount(0);
list.setFixedCellHeight(CELL_SIZE);
list.setFixedCellWidth(CELL_SIZE);
list.setTransferHandler(
new URIImportTransferHandler() {
@Override
public boolean canImport(TransferSupport support) {
support.setShowDropLocation(false);
return super.canImport(support);
}
@Override
public boolean importData(TransferSupport support) {
try {
List<BufferedImage> images = new ArrayList<BufferedImage>();
for (URI u : getURIs(support)) {
try {
images.add(ImageIO.read(u.toURL()));
} catch (IOException e) {
}
}
addExamples(images);
return true;
} catch (IOException e) {
return false;
} catch (UnsupportedFlavorException e) {
return false;
} catch (URISyntaxException e) {
return false;
}
}
});
list.setCellRenderer(
new DefaultListCellRenderer() {
@Override
public Component getListCellRendererComponent(
JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
Example example = (Example) value;
setHorizontalAlignment(SwingConstants.CENTER);
setText(null);
setIcon(example.getIcon());
setBorder(BorderFactory.createEmptyBorder());
return this;
}
});
JScrollPane jsp = new JScrollPane(list);
jsp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
final JButton remove = new JButton("Remove");
remove.addActionListener(
new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int[] indices = list.getSelectedIndices();
for (int i = indices.length - 1; i >= 0; i--) {
model.remove(indices[i]);
}
}
});
list.addListSelectionListener(
new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent e) {
remove.setEnabled(list.getSelectedIndex() != -1);
}
});
remove.setEnabled(false);
panel = new JPanel(new GridBagLayout());
// Add list
GridBagConstraints c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 0;
c.weightx = 1;
c.weighty = 1;
c.fill = GridBagConstraints.BOTH;
panel.add(jsp, c);
// Add remove button
c = new GridBagConstraints();
c.gridx = 0;
c.anchor = GridBagConstraints.WEST;
panel.add(remove, c);
}