// License: GPL. For details, see LICENSE file. package org.openstreetmap.josm.gui.dialogs.layer; import static org.openstreetmap.josm.tools.I18n.tr; import java.awt.datatransfer.Transferable; import java.awt.datatransfer.UnsupportedFlavorException; import java.io.IOException; import java.util.ArrayList; import java.util.Collection; import java.util.List; import javax.swing.JComponent; import javax.swing.JTable; import javax.swing.TransferHandler; import org.openstreetmap.josm.Main; import org.openstreetmap.josm.data.osm.DataSet; import org.openstreetmap.josm.gui.datatransfer.LayerTransferable; import org.openstreetmap.josm.gui.dialogs.LayerListDialog.LayerListModel; import org.openstreetmap.josm.gui.layer.Layer; import org.openstreetmap.josm.gui.layer.OsmDataLayer; /** * This class allows the user to transfer layers using drag+drop. *
* It supports copy (duplication) of layers, simple moves and linking layers to a new layer manager.
*
* @author Michael Zangl
* @since 10605
*/
public class LayerListTransferHandler extends TransferHandler {
@Override
public int getSourceActions(JComponent c) {
// we know that the source is a layer list, so don't check c.
LayerListModel tableModel = (LayerListModel) ((JTable) c).getModel();
if (tableModel.getSelectedLayers().isEmpty()) {
return 0;
}
int actions = MOVE;
if (onlyDataLayersSelected(tableModel)) {
actions |= COPY;
}
return actions /* soon: | LINK*/;
}
private static boolean onlyDataLayersSelected(LayerListModel tableModel) {
for (Layer l : tableModel.getSelectedLayers()) {
if (!(l instanceof OsmDataLayer)) {
return false;
}
}
return true;
}
@Override
protected Transferable createTransferable(JComponent c) {
LayerListModel tableModel = (LayerListModel) ((JTable) c).getModel();
return new LayerTransferable(tableModel.getLayerManager(), tableModel.getSelectedLayers());
}
@Override
public boolean canImport(TransferSupport support) {
if (support.isDrop()) {
support.setShowDropLocation(true);
}
if (!support.isDataFlavorSupported(LayerTransferable.LAYER_DATA)) {
return false;
}
if (support.getDropAction() == LINK) {
// cannot link yet.
return false;
}
return true;
}
@Override
public boolean importData(TransferSupport support) {
try {
LayerListModel tableModel = (LayerListModel) ((JTable) support.getComponent()).getModel();
LayerTransferable.Data layers = (LayerTransferable.Data) support.getTransferable()
.getTransferData(LayerTransferable.LAYER_DATA);
int dropLocation;
if (support.isDrop()) {
JTable.DropLocation dl = (JTable.DropLocation) support.getDropLocation();
dropLocation = dl.getRow();
} else {
dropLocation = layers.getLayers().get(0).getDefaultLayerPosition().getPosition(layers.getManager());
}
boolean isSameLayerManager = tableModel.getLayerManager() == layers.getManager();
if (isSameLayerManager && support.getDropAction() == MOVE) {
for (Layer layer : layers.getLayers()) {
boolean wasBeforeInsert = layers.getManager().getLayers().indexOf(layer) <= dropLocation;
if (wasBeforeInsert) {
// need to move insertion point one down to preserve order
dropLocation--;
}
layers.getManager().moveLayer(layer, dropLocation);
dropLocation++;
}
} else {
List