public void dragGestureRecognized(DragGestureEvent event) {
if (folderPanel.getMainFrame().getNoEventsMode()) return;
FileTable fileTable = folderPanel.getFileTable();
FileTableModel tableModel = fileTable.getFileTableModel();
// Return (do not initiate drag) if mouse button2 or button3 was used
if ((event.getTriggerEvent().getModifiers()
& (InputEvent.BUTTON2_MASK | InputEvent.BUTTON3_MASK))
!= 0) return;
// Do not use that to retrieve the current selected file as it is inaccurate: the selection
// could have changed since the
// the mouse was clicked.
// AbstractFile selectedFile = fileTable.getSelectedFile(false);
// // Return if selected file is null (could happen if '..' is selected)
// if(selectedFile==null)
// return;
// Find out which row was clicked
int clickedRow = fileTable.rowAtPoint(event.getDragOrigin());
// Return (do not initiate drag) if the selected file is the parent folder '..'
if (clickedRow == -1 || fileTable.isParentFolder(clickedRow)) return;
// Retrieve the file corresponding to the clicked row
AbstractFile selectedFile = tableModel.getFileAtRow(clickedRow);
// Find out which files are to be dragged, based on the selected file and currenlty marked
// files.
// If there are some files marked, drag marked files only if the selected file is one of the
// marked files.
// In any other case, only drag the selected file.
FileSet markedFiles;
FileSet draggedFiles;
if (tableModel.getNbMarkedFiles() > 0
&& (markedFiles = fileTable.getSelectedFiles()).contains(selectedFile)) {
draggedFiles = markedFiles;
} else {
draggedFiles = new FileSet(fileTable.getCurrentFolder(), selectedFile);
}
// Set initial DnDContext information
DnDContext.setDragInitiatedByMucommander(true);
DnDContext.setDragInitiator(folderPanel);
DnDContext.setDragGestureModifiersEx(event.getTriggerEvent().getModifiersEx());
// Start dragging
DragSource.getDefaultDragSource()
.startDrag(event, null, new TransferableFileSet(draggedFiles), this);
// DragSource.getDefaultDragSource().startDrag(createCustomDragGestureEvent(event,
// DnDConstants.ACTION_MOVE), null, new TransferableFileSet(draggedFiles), this);
}
// DragGestureListener interface method
public void dragGestureRecognized(final DragGestureEvent e) {
// we should make sure we aren't in edit mode
final InputEvent ievent = e.getTriggerEvent();
if (ievent instanceof MouseEvent) {
// even though I tell dgRecognizer to ignore the the right mouse button,
// it thinks the RMB starts a drag event...argh
if ((((MouseEvent) ievent).getModifiers() & InputEvent.BUTTON3_MASK) != 0) return;
}
// begin dnd
final Point ptDragOrigin = e.getDragOrigin();
final TreePath path = getPathForLocation(ptDragOrigin.x, ptDragOrigin.y);
if (path == null) return;
if (isRootPath(path)) return; // Ignore user trying to drag the root node
// Work out the offset of the drag point from the TreePath bounding rectangle origin
final Rectangle raPath = getPathBounds(path);
_ptOffset.setLocation(ptDragOrigin.x - raPath.x, ptDragOrigin.y - raPath.y);
// Get the cell renderer (which is a JLabel) for the path being dragged
final JLabel lbl =
(JLabel)
getCellRenderer()
.getTreeCellRendererComponent(
this, // tree
path.getLastPathComponent(), // value
false, // isSelected (dont want a colored background)
this.isExpanded(path), // isExpanded
getModel().isLeaf(path.getLastPathComponent()), // isLeaf
0, // row (not important for rendering)
false // hasFocus (dont want a focus rectangle)
);
lbl.setSize(
(int) raPath.getWidth(),
(int) raPath.getHeight()); // <-- The layout manager would normally do this
// Get a buffered image of the selection for dragging a ghost image
_imgGhost =
new BufferedImage(
(int) raPath.getWidth(), (int) raPath.getHeight(), BufferedImage.TYPE_INT_ARGB_PRE);
final Graphics2D g2 = _imgGhost.createGraphics();
// Ask the cell renderer to paint itself into the BufferedImage
g2.setComposite(
AlphaComposite.getInstance(AlphaComposite.SRC, 0.5f)); // Make the image ghostlike
lbl.paint(g2);
// Now paint a gradient UNDER the ghosted JLabel text (but not under the icon if any)
// Note: this will need tweaking if your icon is not positioned to the left of the text
final Icon icon = lbl.getIcon();
final int nStartOfText = (icon == null) ? 0 : icon.getIconWidth() + lbl.getIconTextGap();
g2.setComposite(
AlphaComposite.getInstance(AlphaComposite.DST_OVER, 0.5f)); // Make the gradient ghostlike
g2.setPaint(
new GradientPaint(
nStartOfText,
0,
SystemColor.controlShadow,
getWidth(),
0,
new Color(255, 255, 255, 0)));
g2.fillRect(nStartOfText, 0, getWidth(), _imgGhost.getHeight());
g2.dispose();
setSelectionPath(path); // Select this path in the tree
// Wrap the path being transferred into a Transferable object
final Transferable transferable = new CTransferableTreePath(path);
// Remember the path being dragged (because if it is being moved, we will have to delete it
// later)
_pathSource = path;
// We pass our drag image just in case it IS supported by the platform
e.startDrag(null, _imgGhost, new Point(5, 5), transferable, this);
}
