Index: /applications/editors/josm/plugins/smed/src/org/openstreetmap/josm/plugins/seamapeditor/SmedAction.java
===================================================================
--- /applications/editors/josm/plugins/smed/src/org/openstreetmap/josm/plugins/seamapeditor/SmedAction.java	(revision 34588)
+++ /applications/editors/josm/plugins/smed/src/org/openstreetmap/josm/plugins/seamapeditor/SmedAction.java	(revision 34588)
@@ -0,0 +1,109 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.plugins.seamapeditor;
+
+import static org.openstreetmap.josm.tools.I18n.tr;
+
+import java.awt.Dimension;
+import java.awt.event.ActionEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.util.Collection;
+
+import javax.swing.JFrame;
+import javax.swing.SwingUtilities;
+import javax.swing.WindowConstants;
+
+import org.openstreetmap.josm.actions.JosmAction;
+import org.openstreetmap.josm.data.osm.DataSelectionListener;
+import org.openstreetmap.josm.data.osm.OsmPrimitive;
+import org.openstreetmap.josm.data.osm.event.SelectionEventManager;
+import org.openstreetmap.josm.plugins.seamapeditor.messages.Messages;
+import org.openstreetmap.josm.plugins.seamapeditor.panels.PanelMain;
+
+public class SmedAction extends JosmAction implements DataSelectionListener {
+
+    private static final long serialVersionUID = 1L;
+    private static String editor = tr("SeaMap Editor");
+    public static JFrame editFrame = null;
+    private boolean isOpen = false;
+    public static PanelMain panelMain = null;
+
+    public OsmPrimitive node = null;
+    private Collection<? extends OsmPrimitive> selection = null;
+
+    public SmedAction() {
+        super(editor, "Smed", editor, null, true);
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent arg0) {
+        SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                if (!isOpen) {
+                    createFrame();
+                } else {
+                    editFrame.toFront();
+                }
+                isOpen = true;
+            }
+        });
+    }
+
+    protected void createFrame() {
+        editFrame = new JFrame(editor);
+        editFrame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
+        editFrame.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                closeDialog();
+            }
+        });
+        editFrame.setSize(new Dimension(420, 430));
+        editFrame.setLocation(100, 200);
+        editFrame.setResizable(true);
+        editFrame.setAlwaysOnTop(true);
+        editFrame.setVisible(true);
+        editFrame.setLayout(null);
+        panelMain = new PanelMain(this);
+        panelMain.setBounds(10, 10, 400, 400);
+        node = null;
+        panelMain.syncPanel();
+        editFrame.add(panelMain);
+        SelectionEventManager.getInstance().addSelectionListener(this);
+    }
+
+    public void closeDialog() {
+        if (isOpen) {
+            editFrame.setVisible(false);
+            editFrame.dispose();
+        }
+        isOpen = false;
+    }
+
+    @Override
+    public void selectionChanged(SelectionChangeEvent event) {
+        OsmPrimitive nextNode = null;
+        selection = event.getSelection();
+
+        for (OsmPrimitive osm : selection) {
+            nextNode = osm;
+            if (selection.size() == 1) {
+                if (nextNode.compareTo(node) != 0) {
+                    node = nextNode;
+                    panelMain.mark.parseMark(node);
+                }
+            } else {
+                node = null;
+                panelMain.mark.clrMark();
+                PanelMain.messageBar.setText(Messages.getString("OneNode"));
+            }
+        }
+        if (nextNode == null) {
+            node = null;
+            panelMain.mark.clrMark();
+            PanelMain.messageBar.setText(Messages.getString("SelectNode"));
+        }
+    }
+
+}
Index: /applications/editors/josm/plugins/smed/src/org/openstreetmap/josm/plugins/seamapeditor/SmedPlugin.java
===================================================================
--- /applications/editors/josm/plugins/smed/src/org/openstreetmap/josm/plugins/seamapeditor/SmedPlugin.java	(revision 34588)
+++ /applications/editors/josm/plugins/smed/src/org/openstreetmap/josm/plugins/seamapeditor/SmedPlugin.java	(revision 34588)
@@ -0,0 +1,25 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.plugins.seamapeditor;
+
+import org.openstreetmap.josm.gui.MainApplication;
+import org.openstreetmap.josm.gui.MainMenu;
+import org.openstreetmap.josm.gui.MapFrame;
+import org.openstreetmap.josm.plugins.Plugin;
+import org.openstreetmap.josm.plugins.PluginInformation;
+
+public class SmedPlugin extends Plugin {
+
+    SmedAction dialog = new SmedAction();
+
+    public SmedPlugin(PluginInformation info) {
+        super(info);
+        MainMenu.add(MainApplication.getMenu().toolsMenu, dialog);
+    }
+
+    @Override
+    public void mapFrameInitialized(MapFrame oldFrame, MapFrame newFrame) {
+        if (newFrame == null) {
+            dialog.closeDialog();
+        }
+    }
+}