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| public class Exemple extends JPanel {
private DefaultListModel<String> modelLeft;
private DefaultListModel<String> modelRight;
private JList<String> listLeft;
private JList<String> listRight;
private JButton selectionToRight;
private JButton allToRight;
private JButton selectionToLeft;
private JButton allToLeft;
public Exemple() {
super(new GridBagLayout());
Insets insets = new Insets(5, 5, 5, 5);
GridBagConstraints listConstraint = new GridBagConstraints(0,0,1,1,1,1,GridBagConstraints.CENTER, GridBagConstraints.BOTH, insets, 0, 0);
GridBagConstraints buttonConstraint = new GridBagConstraints(1,0,1,1,0,0,GridBagConstraints.CENTER, GridBagConstraints.NONE, insets, 0, 0);
modelLeft = new DefaultListModel<>();
for(int i=1; i<=10; i++) {
modelLeft.addElement("Truc " + i);
}
listLeft = new JList<>(modelLeft);
add(new JScrollPane(listLeft),listConstraint);
selectionToRight = new JButton(">");
allToRight = new JButton(">>");
selectionToLeft = new JButton("<");
allToLeft = new JButton("<<");
JPanel buttonPanel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints(0, 0, 1, 1, 1, 0, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, insets, 0, 0);
buttonPanel.add(selectionToRight,gbc);
gbc.gridy++;
buttonPanel.add(selectionToLeft,gbc);
gbc.gridy++;
buttonPanel.add(Box.createHorizontalStrut(5),gbc);
gbc.gridy++;
buttonPanel.add(allToRight,gbc);
gbc.gridy++;
buttonPanel.add(allToLeft,gbc);
gbc.gridy++;
add(buttonPanel,buttonConstraint);
modelRight = new DefaultListModel<>();
for(int i=11; i<=20; i++) {
modelRight.addElement("Truc " + i);
}
listRight = new JList<>(modelRight);
listConstraint.gridx=2;
add(new JScrollPane(listRight),listConstraint);
listLeft.addListSelectionListener(this::selectionChange);
listRight.addListSelectionListener(this::selectionChange);
selectionToRight.addActionListener(e -> moveSelectionToRight());
selectionToLeft.addActionListener(e -> moveSelectionToLeft());
allToRight.addActionListener(e -> moveAllToRight());
allToLeft.addActionListener(e -> moveAllToLeft());
updateButtons();
}
private void selectionChange(ListSelectionEvent e) {
if( !e.getValueIsAdjusting() ) {
updateButtons();
}
}
private void moveSelectionToRight() {
List<String> selection = listLeft.getSelectedValuesList();
moveItems(selection, modelLeft, modelRight);
updateSelection(selection, listRight, modelRight);
updateButtons();
}
private void updateSelection(List<String> selection, JList<String> list,
DefaultListModel<String> model) {
list.setSelectedIndices(selection.stream().map(model::indexOf).mapToInt(Integer::intValue).toArray());
}
private void moveSelectionToLeft() {
List<String> selection = listRight.getSelectedValuesList();
moveItems(selection, modelRight, modelLeft);
updateSelection(selection, listLeft, modelLeft);
updateButtons();
}
private void moveAllToRight() {
List<String> selection = getAllValues(modelLeft);
modelLeft.removeAllElements();
addValuesTo(modelRight,selection);
updateSelection(selection, listRight, modelRight);
updateButtons();
}
private void moveAllToLeft() {
List<String> selection = getAllValues(modelRight);
modelRight.removeAllElements();
addValuesTo(modelLeft,selection);
updateSelection(selection, listLeft, modelLeft);
updateButtons();
}
private void moveItems(List<String> selection, DefaultListModel<String> sourceModel, DefaultListModel<String> targetModel) {
for(String item : selection) {
sourceModel.removeElement(item);
}
addValuesTo(targetModel, selection);
}
private void addValuesTo(DefaultListModel<String> model, List<String> selection) {
for(String item : selection) {
model.addElement(item);
}
}
private List<String> getAllValues(DefaultListModel<String> model) {
List<String> list = new ArrayList<>();
for(int i=0; i<model.size(); i++) {
list.add(model.getElementAt(i));
}
return list;
}
private void updateButtons() {
selectionToRight.setEnabled(listLeft.getSelectedValuesList().size()>0);
allToRight.setEnabled(modelLeft.getSize()>0);
selectionToLeft.setEnabled(listRight.getSelectedValuesList().size()>0);
allToLeft.setEnabled(modelRight.getSize()>0);
}
public static void main(String[] args) {
JFrame frame = new JFrame("Exemple");
frame.add(new Exemple());
frame.setSize(600,400);
frame.setResizable(false);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
} |
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