java.awt.dnd.DragGestureEvent#getComponent ( )源码实例Demo

/**
 * {@inheritDoc}
 */
public void dragGestureRecognized(DragGestureEvent dge) {
    JComponent c = (JComponent)dge.getComponent();
    DefaultTransferHandler th
        = (DefaultTransferHandler)c.getTransferHandler();
    Transferable t = th.createTransferable(c);
    if (t == null) {
        logger.warning("Unable to create transferable for: " + dge);
        th.exportDone(c, null, NONE);
        return;
    }

    this.scrolls = c.getAutoscrolls();
    c.setAutoscrolls(false);
    try {
        Cursor cursor = getCursor(c);
        dge.startDrag(cursor, t, this);
    } catch (RuntimeException re) {
        c.setAutoscrolls(this.scrolls);
    }
}
 

public void dragGestureRecognized(DragGestureEvent dge) {
	Point p = dge.getDragOrigin();
	Component c = dge.getComponent();
	JFrame f = (JFrame) SwingUtilities.getWindowAncestor(c);
	p = SwingUtilities.convertPoint(c, p, f);

	for (int a = 0; a < componentList.length; a++) {
		if (triggerDrag(f, p, dge, componentList[a]))
			return;
	}
	// double-check for separators & gaps:
	for (int a = 0; a < getComponentCount(); a++) {
		if (triggerDrag(f, p, dge, (JComponent) getComponent(a)))
			return;
	}

}
 

public void dragGestureRecognized(DragGestureEvent dge) {

			Point p = dge.getDragOrigin();
			MockComponent mc = (MockComponent) dge.getComponent();
			Transferable transferable = new MockComponentTransferable(mc);
			BufferedImage bi = mc.getBufferedImage();
			if (mc instanceof MockDefaultToolbar) {
				toolbar.draggingComponent = "";
			} else if (mc.getName().equals("-")) {
				toolbar.draggingComponent = toolbar.getNewSeparatorName();
			} else if (mc.getName().equals(" ")) {
				toolbar.draggingComponent = toolbar.getNewSpaceName();
			} else if (mc.getName().equals("\t")) {
				toolbar.draggingComponent = toolbar.getNewFlexibleSpaceName();
			} else {
				toolbar.draggingComponent = mc.getName();
			}
			toolbar.draggingDefaults = (mc instanceof MockDefaultToolbar);
			toolbar.draggingFromToolbar = false;
			dge.startDrag(DragSource.DefaultMoveDrop, bi,
					new Point(-p.x, -p.y), transferable, dragSourceListener);
		}
 

public void dragGestureRecognized( DragGestureEvent dge ) {
    Transferable t = null;
    
    if( dge.getComponent() instanceof CategoryButton ) {
        //trying to drag a palette category
        CategoryButton button = (CategoryButton)dge.getComponent();
        draggingCategory = button.getCategory();
        t = draggingCategory.getTransferable();
        
    } else if( dge.getComponent() instanceof CategoryList ) {
        //trying to drag a palette item
        CategoryList list = (CategoryList)dge.getComponent();
        int selIndex = list.locationToIndex( dge.getDragOrigin() );
        draggingItem = list.getItemAt( selIndex );
        if( null == draggingItem ) {
            return;
        }
        t = draggingItem.drag();
        dragSourceCategoryList = list;
    }
    if( null != t ) {
        dge.getDragSource().addDragSourceListener( getDragSourceListener() );
        try {
            dge.startDrag( null, t );
        } catch( InvalidDnDOperationException idndE ) {
            //attempt to fix #110670
            try {
                dge.startDrag( null, t );
            } catch( InvalidDnDOperationException e ) {
                ERR.log( Level.INFO, idndE.getMessage(), e );
            }
        }
    }
}
 

@Override
public void dragGestureRecognized(@Nonnull final DragGestureEvent dragGestureEvent) {
  final JTree tree = (JTree) dragGestureEvent.getComponent();
  final TreePath path = tree.getSelectionPath();
  if (path != null) {
    final Object selection = path.getLastPathComponent();
    if (selection instanceof NodeFileOrFolder) {
      FileTransferable node = new FileTransferable(Arrays.asList(((NodeFileOrFolder) selection).makeFileForNode()));
      dragGestureEvent.startDrag(DragSource.DefaultCopyDrop, node, this);
    }
  }
}
 

public void dragGestureRecognized(DragGestureEvent e) {
    Component c = e.getComponent();
    if( !(c instanceof JComponent) )
        return;

    Transferable t = null;
    try {
        final DataObject dob = (DataObject) ((JComponent) c).getClientProperty("file");
        if( dob != null && c.getParent() instanceof Toolbar && buttonDndAllowed ) {
            //dragging a toolbar button
            sourceToolbar = (Toolbar) c.getParent();
            t = new ExTransferable.Single(buttonDataFlavor) {
                public Object getData() {
                    return dob;
                }
            };
            isToolbarDrag = false;
            isButtonDrag = true;
            dragSourceButtonIndex = sourceToolbar.getComponentIndex(c);
        } else if( Boolean.TRUE.equals( ((JComponent) c).getClientProperty(ToolbarContainer.PROP_DRAGGER) ) ) {
            //dragging the whole toolbar
            final ToolbarContainer container = (ToolbarContainer) c.getParent().getParent();
            if( container.isShowing() ) {
                sourceContainer = container;
                sourceRow = (ToolbarRow) container.getParent();
                t = new ExTransferable.Single(toolbarDataFlavor) {

                    public Object getData() {
                        return container;
                    }
                };
                isToolbarDrag = true;
                isButtonDrag = false;
                startingPoint = new Point(e.getDragOrigin());
                Rectangle bounds = new Rectangle(sourceContainer.getPreferredSize());
                bounds.setLocation(sourceContainer.getLocationOnScreen());
                dragImage = createContentImage(sourceContainer, bounds.getSize());
                sourceRow.dragStarted( sourceContainer );
                dragWindow = createDragWindow( dragImage, bounds );
            }
        }
        if( c instanceof JButton ) {
            ((JButton) c).getModel().setArmed(false);
            ((JButton) c).getModel().setPressed(false);
            ((JButton) c).getModel().setRollover(true);
        }
        if( t != null ) {
            e.startDrag(dragMoveCursor, t, this);
        }
    } catch( InvalidDnDOperationException idoE ) {
        log.log(Level.INFO, null, idoE);
    }
}