+++ /dev/null
-package fr.orsay.lri.varna.components;
-
-import java.awt.Color;
-import java.awt.Component;
-import java.awt.Cursor;
-import java.awt.Graphics;
-import java.awt.Point;
-import java.awt.Rectangle;
-import java.awt.datatransfer.DataFlavor;
-import java.awt.datatransfer.Transferable;
-import java.awt.datatransfer.UnsupportedFlavorException;
-import java.awt.dnd.DnDConstants;
-import java.awt.dnd.DragGestureEvent;
-import java.awt.dnd.DragGestureListener;
-import java.awt.dnd.DragGestureRecognizer;
-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.DropTarget;
-import java.awt.dnd.DropTargetDragEvent;
-import java.awt.dnd.DropTargetDropEvent;
-import java.awt.dnd.DropTargetEvent;
-import java.awt.dnd.DropTargetListener;
-import java.io.IOException;
-
-import javax.swing.DefaultListCellRenderer;
-import javax.swing.DefaultListModel;
-import javax.swing.JList;
-
-public class ReorderableJList extends JList
-implements DragSourceListener, DropTargetListener, DragGestureListener {
-
-static DataFlavor localObjectFlavor;
-static {
- try {
- localObjectFlavor =
- new DataFlavor (DataFlavor.javaJVMLocalObjectMimeType);
- } catch (ClassNotFoundException cnfe) { cnfe.printStackTrace(); }
-}
-static DataFlavor[] supportedFlavors = { localObjectFlavor };
-DragSource dragSource;
-DropTarget dropTarget;
-int dropTargetIndex;
-int draggedIndex = -1;
-
-public ReorderableJList () {
- super();
- setCellRenderer (new ReorderableListCellRenderer());
- setModel (new DefaultListModel());
- dragSource = new DragSource();
- DragGestureRecognizer dgr =
- dragSource.createDefaultDragGestureRecognizer (this,
- DnDConstants.ACTION_MOVE,
- this);
- dropTarget = new DropTarget (this, this);
-}
-
-// DragGestureListener
-public void dragGestureRecognized (DragGestureEvent dge) {
- //System.out.println ("dragGestureRecognized");
- // find object at this x,y
- Point clickPoint = dge.getDragOrigin();
- int index = locationToIndex(clickPoint);
- if (index == -1)
- return;
- Object target = getModel().getElementAt(index);
- Transferable trans = new RJLTransferable (target);
- draggedIndex = index;
- dragSource.startDrag (dge,Cursor.getDefaultCursor(),
- trans, this);
-}
-// DragSourceListener events
-public void dragDropEnd (DragSourceDropEvent dsde) {
- //System.out.println ("dragDropEnd()");
- dropTargetIndex = -1;
- draggedIndex = -1;
- repaint();
-}
-public void dragEnter (DragSourceDragEvent dsde) {}
-public void dragExit (DragSourceEvent dse) {}
-public void dragOver (DragSourceDragEvent dsde) {}
-public void dropActionChanged (DragSourceDragEvent dsde) {}
-// DropTargetListener events
-public void dragEnter (DropTargetDragEvent dtde) {
- //System.out.println ("dragEnter");
- if (dtde.getSource() != dropTarget)
- dtde.rejectDrag();
- else {
- dtde.acceptDrag(DnDConstants.ACTION_COPY_OR_MOVE);
- //System.out.println ("accepted dragEnter");
- }
-}
-public void dragExit (DropTargetEvent dte) {}
-
-public void dropActionChanged (DropTargetDragEvent dtde) {}
-
-public void dragOver (DropTargetDragEvent dtde) {
- // figure out which cell it's over, no drag to self
- if (dtde.getSource() != dropTarget)
- dtde.rejectDrag();
- Point dragPoint = dtde.getLocation();
- int index = locationToIndex (dragPoint);
- dropTargetIndex = index;
- if (dropTargetIndex != -1)
- {
- Rectangle r = getCellBounds(dropTargetIndex,dropTargetIndex);
- if (dragPoint.y > r.y+r.height/2)
- {
- dropTargetIndex += 1;
- }
- }
- //System.out.println(dropTargetIndex);
- repaint();
-}
-
-public void drop (DropTargetDropEvent dtde) {
- //System.out.println ("drop()!");
- if (dtde.getSource() != dropTarget) {
- //System.out.println ("rejecting for bad source (" +
- // dtde.getSource().getClass().getName() + ")");
- dtde.rejectDrop();
- return;
- }
- Point dropPoint = dtde.getLocation();
- int index = locationToIndex (dropPoint);
- if (index != -1)
- {
- Rectangle r = getCellBounds(index,index);
- if (dropPoint.y > r.y+r.height/2)
- {
- index += 1;
- }
- }
-
- //System.out.println ("drop index is " + index);
- boolean dropped = false;
- try {
- if ((index == -1) || (index == draggedIndex)|| (index == draggedIndex+1)) {
- //System.out.println ("dropped onto self");
- dtde.rejectDrop();
- return;
- }
- dtde.acceptDrop (DnDConstants.ACTION_MOVE);
- //System.out.println ("accepted");
- Object dragged =
- dtde.getTransferable().getTransferData(localObjectFlavor);
- // move items - note that indicies for insert will
- // change if [removed] source was before target
- //System.out.println ("drop " + draggedIndex + " to " + index);
- boolean sourceBeforeTarget = (draggedIndex < index);
- //System.out.println ("source is" +
- // (sourceBeforeTarget ? "" : " not") +
- // " before target");
- //System.out.println ("insert at " +
- // (sourceBeforeTarget ? index-1 : index));
- DefaultListModel mod = (DefaultListModel) getModel();
- mod.remove (draggedIndex);
- mod.add ((sourceBeforeTarget ? index-1 : index), dragged);
- dropped = true;
- } catch (Exception e) {
- e.printStackTrace();
- }
- dtde.dropComplete (dropped);
-}
-
-private class ReorderableListCellRenderer
-extends DefaultListCellRenderer {
-boolean isTargetCell;
-boolean isLastItem;
-public ReorderableListCellRenderer() {
- super();
-}
-public Component getListCellRendererComponent (JList list,
- Object value,
- int index,
- boolean isSelected, boolean hasFocus) {
- isTargetCell = (index == dropTargetIndex);
- isLastItem = (index == list.getModel().getSize()-1) && (dropTargetIndex == list.getModel().getSize());
- boolean showSelected = isSelected;
- return super.getListCellRendererComponent (list, value,
- index, showSelected,
- hasFocus);
-}
-public void paintComponent (Graphics g) {
- super.paintComponent(g);
- if (isTargetCell) {
- g.setColor(Color.black);
- g.drawLine (0, 0, getSize().width, 0);
- }
- if (isLastItem) {
- g.setColor(Color.black);
- g.drawLine (0, getSize().height-1, getSize().width, getSize().height-1);
- }
- }
-}
-
-private class RJLTransferable implements Transferable {
- Object object;
- public RJLTransferable (Object o) {
- object = o;
- }
- public Object getTransferData(DataFlavor df)
- throws UnsupportedFlavorException, IOException {
- if (isDataFlavorSupported (df))
- return object;
- else
- throw new UnsupportedFlavorException(df);
- }
- public boolean isDataFlavorSupported (DataFlavor df) {
- return (df.equals (localObjectFlavor));
- }
- public DataFlavor[] getTransferDataFlavors () {
- return supportedFlavors; }
-}
-
-
-}
git://source.jalview.org / jalview.git / blobdiff