package org.freeplane.view.swing.ui.mindmapmode;
import java.awt.Cursor;
import java.awt.Rectangle;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;
import java.awt.dnd.DragSourceDragEvent;
import java.awt.dnd.DragSourceDropEvent;
import java.awt.dnd.DragSourceEvent;
import java.awt.dnd.DragSourceListener;
import java.awt.dnd.InvalidDnDOperationException;
import java.awt.event.InputEvent;
import org.freeplane.features.clipboard.ClipboardController;
import org.freeplane.features.clipboard.MindMapNodesSelection;
import org.freeplane.features.map.NodeModel;
import org.freeplane.features.mode.Controller;
import org.freeplane.view.swing.map.MainView;
import org.freeplane.view.swing.map.MapView;
import org.freeplane.view.swing.map.NodeView;
/**
* The NodeDragListener which belongs to every NodeView
*/
public class MNodeDragListener implements DragGestureListener {
public void dragGestureRecognized(final DragGestureEvent e) {
final MainView mainView = (MainView) e.getComponent();
final NodeView nodeView = mainView.getNodeView();
final MapView mapView = nodeView.getMap();
mapView.select();
if(! nodeView.isSelected()){
nodeView.getMap().getModeController().getController().getSelection().selectAsTheOnlyOneSelected(nodeView.getModel());
}
Rectangle bounds = new Rectangle(0, 0, mainView.getWidth(), mainView.getHeight());
if(!bounds.contains(e.getDragOrigin()))
return;
final int dragActionType = e.getDragAction();
if (dragActionType == DnDConstants.ACTION_MOVE) {
final NodeModel node = nodeView.getModel();
if (node.isRoot()) {
if(! isLinkDragEvent(e))
return;
}
}
final String dragActionName;
Cursor cursor = getCursorByAction(dragActionType);
if (isLinkDragEvent(e)) {
cursor = DragSource.DefaultLinkDrop;
dragActionName = "LINK";
}
else if ((e.getTriggerEvent().getModifiersEx() & InputEvent.BUTTON2_DOWN_MASK) != 0) {
cursor = DragSource.DefaultCopyDrop;
dragActionName = "COPY";
}
else {
dragActionName = "MOVE";
}
final Transferable t = ClipboardController.getController().copy(Controller.getCurrentController().getSelection());
((MindMapNodesSelection) t).setDropAction(dragActionName);
try {
e.startDrag(cursor, t, new DragSourceListener() {
public void dragDropEnd(final DragSourceDropEvent dsde) {
}
public void dragEnter(final DragSourceDragEvent e) {
}
public void dragExit(final DragSourceEvent dse) {
}
public void dragOver(final DragSourceDragEvent dsde) {
}
public void dropActionChanged(final DragSourceDragEvent dsde) {
dsde.getDragSourceContext().setCursor(getCursorByAction(dsde.getUserAction()));
}
});
}
catch (final InvalidDnDOperationException ex) {
}
}
private boolean isLinkDragEvent(final DragGestureEvent e) {
return (e.getTriggerEvent().getModifiersEx() & InputEvent.BUTTON3_DOWN_MASK) != 0;
}
public Cursor getCursorByAction(final int dragAction) {
switch (dragAction) {
case DnDConstants.ACTION_COPY:
return DragSource.DefaultCopyDrop;
case DnDConstants.ACTION_LINK:
return DragSource.DefaultLinkDrop;
default:
return DragSource.DefaultMoveDrop;
}
}
}