Examples with DragNodeCommand org.eclipse.wst.xml.ui.internal.dnd.DragNodeCommand used on opensource projects

Example 1 with DragNodeCommand

use of org.eclipse.wst.xml.ui.internal.dnd.DragNodeCommand in project webtools.sourceediting by eclipse.

the class XMLTableTreeViewer method createDropTargetListener.

private DropTargetListener createDropTargetListener() {
    return new DropTargetListener() {

        public void dragEnter(DropTargetEvent event) {
        }

        public void dragLeave(DropTargetEvent event) {
        }

        public void dragOperationChanged(DropTargetEvent event) {
        }

        public void drop(DropTargetEvent event) {
            if (event.operations != DND.DROP_NONE && LocalSelectionTransfer.getTransfer().getSelection() instanceof IStructuredSelection) {
                dragOver(event);
                IStructuredSelection selection = (IStructuredSelection) LocalSelectionTransfer.getTransfer().getSelection();
                if (selection != null && !selection.isEmpty() && event.item != null && event.item.getData() != null) {
                    /*
						 * the command uses these numbers instead of the
						 * feedback constants (even though it converts in
						 * the other direction as well)
						 */
                    float feedbackFloat = getHeightInItem(event);
                    final DragNodeCommand command = new DragNodeCommand(event.item.getData(), feedbackFloat, event.operations, event.detail, selection.toList(), XMLTableTreeViewer.this);
                    if (command != null && command.canExecute()) {
                        SafeRunnable.run(new SafeRunnable() {

                            public void run() throws Exception {
                                command.execute();
                            }
                        });
                    }
                }
            }
        }

        public void dropAccept(DropTargetEvent event) {
        }

        public void dragOver(DropTargetEvent event) {
            event.feedback = DND.FEEDBACK_SELECT;
            float feedbackFloat = getHeightInItem(event);
            if (feedbackFloat > 0.75) {
                event.feedback = DND.FEEDBACK_INSERT_AFTER;
            } else if (feedbackFloat < 0.25) {
                event.feedback = DND.FEEDBACK_INSERT_BEFORE;
            }
            event.feedback |= DND.FEEDBACK_EXPAND | DND.FEEDBACK_SCROLL;
            if (getLocalNodeSelection(event) == null) {
                event.detail = DND.DROP_NONE;
            }
        }

        private IStructuredSelection getLocalNodeSelection(DropTargetEvent event) {
            IStructuredSelection selection = (IStructuredSelection) LocalSelectionTransfer.getTransfer().getSelection();
            if (selection != null && !selection.isEmpty()) {
                for (Iterator i = selection.iterator(); i.hasNext(); ) {
                    Object node = i.next();
                    if (node instanceof Node) {
                        return selection;
                    }
                }
            }
            return null;
        }

        private float getHeightInItem(DropTargetEvent event) {
            if (event.item == null)
                return .5f;
            if (event.item instanceof TreeItem) {
                TreeItem treeItem = (TreeItem) event.item;
                Control control = treeItem.getParent();
                Point point = control.toControl(new Point(event.x, event.y));
                Rectangle bounds = treeItem.getBounds();
                return (float) (point.y - bounds.y) / (float) bounds.height;
            } else if (event.item instanceof TableItem) {
                TableItem tableItem = (TableItem) event.item;
                Control control = tableItem.getParent();
                Point point = control.toControl(new Point(event.x, event.y));
                Rectangle bounds = tableItem.getBounds(0);
                return (float) (point.y - bounds.y) / (float) bounds.height;
            } else {
                return 0.0F;
            }
        }
    };
}

Example 2 with DragNodeCommand

use of org.eclipse.wst.xml.ui.internal.dnd.DragNodeCommand in project webtools.sourceediting by eclipse.

the class AbstractXMLContentOutlineConfiguration method getTransferDropTargetListeners.

/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.views.contentoutline.ContentOutlineConfiguration#getTransferDropTargetListeners(org.eclipse.jface.viewers.TreeViewer)
	 */
public TransferDropTargetListener[] getTransferDropTargetListeners(final TreeViewer treeViewer) {
    if (fTransferDropTargetListeners == null) {
        fTransferDropTargetListeners = new TransferDropTargetListener[] { new TransferDropTargetListener() {

            public void dragEnter(DropTargetEvent event) {
            }

            public void dragLeave(DropTargetEvent event) {
            }

            public void dragOperationChanged(DropTargetEvent event) {
            }

            public void dragOver(DropTargetEvent event) {
                event.feedback = DND.FEEDBACK_SELECT;
                float feedbackFloat = getHeightInItem(event);
                if (feedbackFloat > 0.75) {
                    event.feedback = DND.FEEDBACK_INSERT_AFTER;
                } else if (feedbackFloat < 0.25) {
                    event.feedback = DND.FEEDBACK_INSERT_BEFORE;
                }
                event.feedback |= DND.FEEDBACK_EXPAND | DND.FEEDBACK_SCROLL;
            }

            public void drop(DropTargetEvent event) {
                if (event.operations != DND.DROP_NONE && LocalSelectionTransfer.getTransfer().getSelection() != null && !LocalSelectionTransfer.getTransfer().getSelection().isEmpty()) {
                    IStructuredSelection selection = (IStructuredSelection) LocalSelectionTransfer.getTransfer().getSelection();
                    if (selection != null && !selection.isEmpty() && event.item != null && event.item.getData() != null) {
                        /*
							 * the command uses these numbers instead of the
							 * feedback constants (even though it converts in
							 * the other direction as well)
							 */
                        float feedbackFloat = getHeightInItem(event);
                        final DragNodeCommand command = new DragNodeCommand(event.item.getData(), feedbackFloat, event.operations, event.detail, selection.toList(), treeViewer);
                        if (command != null && command.canExecute()) {
                            SafeRunnable.run(new SafeRunnable() {

                                public void run() throws Exception {
                                    command.execute();
                                }
                            });
                        }
                    }
                }
            }

            public void dropAccept(DropTargetEvent event) {
            }

            private float getHeightInItem(DropTargetEvent event) {
                if (event.item == null)
                    return .5f;
                if (event.item instanceof TreeItem) {
                    TreeItem treeItem = (TreeItem) event.item;
                    Control control = treeItem.getParent();
                    Point point = control.toControl(new Point(event.x, event.y));
                    Rectangle bounds = treeItem.getBounds();
                    return (float) (point.y - bounds.y) / (float) bounds.height;
                } else if (event.item instanceof TableItem) {
                    TableItem tableItem = (TableItem) event.item;
                    Control control = tableItem.getParent();
                    Point point = control.toControl(new Point(event.x, event.y));
                    Rectangle bounds = tableItem.getBounds(0);
                    return (float) (point.y - bounds.y) / (float) bounds.height;
                } else {
                    return 0.0F;
                }
            }

            public Transfer getTransfer() {
                return LocalSelectionTransfer.getTransfer();
            }

            public boolean isEnabled(DropTargetEvent event) {
                return getTransfer().isSupportedType(event.currentDataType);
            }
        } };
    }
    return fTransferDropTargetListeners;
}