--- /dev/null
+package tim.prune.gui;
+
+import java.awt.FlowLayout;
+import java.awt.BorderLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import javax.swing.BorderFactory;
+import javax.swing.JButton;
+import javax.swing.JDialog;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JList;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.ListSelectionModel;
+import javax.swing.event.ListSelectionEvent;
+import javax.swing.event.ListSelectionListener;
+
+import tim.prune.App;
+import tim.prune.I18nManager;
+import tim.prune.undo.UndoStack;
+
+/**
+ * Class to manage the selection of actions to undo
+ */
+public class UndoManager
+{
+ private App _app = null;
+ private JFrame _parentFrame = null;
+ private JDialog _dialog = null;
+ private JList<String> _actionList = null;
+
+
+ /**
+ * Constructor
+ * @param inApp App object
+ * @param inFrame parent frame
+ */
+ public UndoManager(App inApp, JFrame inFrame)
+ {
+ _app = inApp;
+ _parentFrame = inFrame;
+ }
+
+ /**
+ * Show the dialog to select which actions to undo
+ */
+ public void show()
+ {
+ _dialog = new JDialog(_parentFrame, I18nManager.getText("dialog.undo.title"), true);
+ _dialog.setLocationRelativeTo(_parentFrame);
+ JPanel mainPanel = new JPanel();
+ mainPanel.setLayout(new BorderLayout(3, 3));
+ mainPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
+ UndoStack undoStack = _app.getUndoStack();
+ mainPanel.add(new JLabel(I18nManager.getText("dialog.undo.pretext")), BorderLayout.NORTH);
+
+ String[] undoActions = new String[undoStack.size()];
+ for (int i=0; i<undoStack.size(); i++)
+ {
+ undoActions[i] = undoStack.getOperationAt(undoStack.size()-1-i).getDescription();
+ }
+ _actionList = new JList<String>(undoActions);
+ _actionList.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
+ _actionList.setSelectedIndex(0);
+ _actionList.addListSelectionListener(new ListSelectionListener()
+ {
+ public void valueChanged(ListSelectionEvent e)
+ {
+ if (_actionList.getMinSelectionIndex() > 0)
+ {
+ _actionList.setSelectionInterval(0, _actionList.getMaxSelectionIndex());
+ }
+ }
+ });
+ mainPanel.add(new JScrollPane(_actionList), BorderLayout.CENTER);
+ // Buttons
+ JPanel buttonPanel = new JPanel();
+ buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
+ JButton okButton = new JButton(I18nManager.getText("button.ok"));
+ okButton.addActionListener(new ActionListener()
+ {
+ public void actionPerformed(ActionEvent e)
+ {
+ _app.undoActions(_actionList.getMaxSelectionIndex() + 1);
+ _dialog.dispose();
+ }
+ });
+ buttonPanel.add(okButton);
+ JButton cancelButton = new JButton(I18nManager.getText("button.cancel"));
+ cancelButton.addActionListener(new ActionListener()
+ {
+ public void actionPerformed(ActionEvent e)
+ {
+ _dialog.dispose();
+ }
+ });
+ buttonPanel.add(cancelButton);
+ mainPanel.add(buttonPanel, BorderLayout.SOUTH);
+ _dialog.getContentPane().add(mainPanel);
+ _dialog.pack();
+ _dialog.setVisible(true);
+ }
+
+}