Examples with TreeGridDropTarget com.vaadin.ui.components.grid.TreeGridDropTarget used on opensource projects

Example 1 with TreeGridDropTarget

use of com.vaadin.ui.components.grid.TreeGridDropTarget in project cuba by cuba-platform.

the class AccessGroupCompanion method initDragAndDrop.

@Override
public void initDragAndDrop(Table<User> usersTable, Tree<Group> groupsTree, Consumer<UserGroupChangedEvent> userGroupChangedHandler, Consumer<GroupChangeEvent> groupChangeEventHandler) {
    usersTable.withUnwrapped(CubaTable.class, CubaTableDragSourceExtension::new);
    groupsTree.withUnwrapped(CubaTree.class, vTree -> {
        // tree as drag source
        // noinspection unchecked
        TreeGridDragSource<Group> treeGridDragSource = new TreeGridDragSource<>(vTree.getCompositionRoot());
        treeGridDragSource.setDragDataGenerator(TRANSFER_DATA_TYPE, group -> group.getId().toString());
        // tree as drop target
        // noinspection unchecked
        TreeGridDropTarget<Group> treeGridDropTarget = new TreeGridDropTarget<>(vTree.getCompositionRoot(), DropMode.ON_TOP);
        treeGridDropTarget.addTreeGridDropListener(event -> {
            // if we drop users from table
            if (event.getDragSourceExtension().isPresent() && event.getDragSourceExtension().get() instanceof CubaTableDragSourceExtension) {
                // return if we drop user between rows
                if (event.getDropLocation() == DropLocation.BELOW) {
                    return;
                }
                // noinspection unchecked
                CubaTableDragSourceExtension<CubaTable> sourceExtension = (CubaTableDragSourceExtension<CubaTable>) event.getDragSourceExtension().get();
                List<Object> itemIds = sourceExtension.getLastDraggedItemIds();
                TableItems<User> tableItems = usersTable.getItems();
                List<User> users = new ArrayList<>();
                for (Object id : itemIds) {
                    users.add(tableItems.getItem(id));
                }
                if (event.getDropTargetRow().isPresent()) {
                    Group group = event.getDropTargetRow().get();
                    userGroupChangedHandler.accept(new UserGroupChangedEvent(groupsTree, users, group));
                }
            // if we reorder groups inside tree
            } else {
                String draggedItemId = event.getDataTransferData().get(TEXT_PLAIN_DATA_TYPE);
                if (isEdgeOrIE() && draggedItemId == null) {
                    draggedItemId = event.getDataTransferText();
                }
                if (draggedItemId == null) {
                    return;
                }
                String[] draggedItemIds = draggedItemId.split("\\r?\\n");
                for (String itemId : draggedItemIds) {
                    Group draggedGroup = groupsTree.getItems().getItem(UUID.fromString(itemId));
                    if (event.getDropTargetRow().isPresent()) {
                        Group targetGroup = event.getDropTargetRow().get();
                        // if we drop to itself
                        if (targetGroup.getId().equals(draggedGroup.getId())) {
                            continue;
                        }
                        // noinspection unchecked
                        if (isParentDroppedToChild(draggedGroup, targetGroup, vTree)) {
                            continue;
                        }
                        // if we drop child to the same parent
                        if (draggedGroup.getParent() != null && (draggedGroup.getParent().getId().equals(targetGroup.getId()))) {
                            continue;
                        }
                        groupChangeEventHandler.accept(new GroupChangeEvent(groupsTree, draggedGroup.getId(), targetGroup.getId()));
                    // if we drop group to empty space make it root
                    } else if (event.getDropLocation() == DropLocation.EMPTY) {
                        groupChangeEventHandler.accept(new GroupChangeEvent(groupsTree, draggedGroup.getId(), null));
                    }
                }
            }
        });
    });
}

Example 2 with TreeGridDropTarget

use of com.vaadin.ui.components.grid.TreeGridDropTarget in project cuba by cuba-platform.

the class WebFilterHelper method initConditionsDragAndDrop.

@SuppressWarnings("unchecked")
@Override
public void initConditionsDragAndDrop(final Tree tree, final ConditionsTree conditions) {
    CubaTree vTree = tree.unwrapOrNull(CubaTree.class);
    if (vTree == null) {
        return;
    }
    TreeGridDragSource<AbstractCondition> treeGridDragSource = new TreeGridDragSource<>(vTree.getCompositionRoot());
    treeGridDragSource.setDragDataGenerator(TREE_DRAGGED_ITEM_ID, item -> item.getId().toString());
    TreeGridDropTarget<AbstractCondition> treeGridDropTarget = new TreeGridDropTarget<>(vTree.getCompositionRoot(), DropMode.ON_TOP_OR_BETWEEN);
    treeGridDropTarget.addTreeGridDropListener(event -> {
        if (!event.getDragSourceComponent().isPresent() || event.getDragSourceComponent().get() != vTree.getCompositionRoot()) {
            return;
        }
        String sourceId = event.getDataTransferData(TREE_DRAGGED_ITEM_ID).isPresent() ? event.getDataTransferData(TREE_DRAGGED_ITEM_ID).get() : null;
        if (sourceId == null) {
            return;
        }
        Object sourceItemId = UUID.fromString(sourceId);
        Object targetItemId = event.getDropTargetRow().isPresent() ? event.getDropTargetRow().get().getId() : null;
        if (targetItemId == null) {
            return;
        }
        // if we drop to itself
        if (targetItemId.equals(sourceItemId)) {
            return;
        }
        AbstractCondition sourceCondition = (AbstractCondition) tree.getItems().getItem(sourceItemId);
        AbstractCondition targetCondition = (AbstractCondition) tree.getItems().getItem(targetItemId);
        Node<AbstractCondition> sourceNode = conditions.getNode(sourceCondition);
        Node<AbstractCondition> targetNode = conditions.getNode(targetCondition);
        // if we drop parent to its child
        if (isAncestorOf(targetNode, sourceNode)) {
            return;
        }
        boolean moveToTheSameParent = Objects.equals(sourceNode.getParent(), targetNode.getParent());
        DropLocation location = event.getDropLocation();
        if (location == DropLocation.ON_TOP) {
            // prevent drop to not group condition
            if (!(targetCondition instanceof GroupCondition)) {
                return;
            }
            if (sourceNode.getParent() == null) {
                conditions.getRootNodes().remove(sourceNode);
            } else {
                sourceNode.getParent().getChildren().remove(sourceNode);
            }
            targetNode.addChild(sourceNode);
            refreshConditionsDs(tree, conditions);
            tree.expand(targetCondition);
        } else {
            List<Node<AbstractCondition>> siblings;
            if (targetNode.getParent() == null)
                siblings = conditions.getRootNodes();
            else
                siblings = targetNode.getParent().getChildren();
            int targetIndex = siblings.indexOf(targetNode);
            if (location == DropLocation.BELOW)
                targetIndex++;
            int sourceNodeIndex;
            if (sourceNode.getParent() == null) {
                sourceNodeIndex = conditions.getRootNodes().indexOf(sourceNode);
                conditions.getRootNodes().remove(sourceNode);
            } else {
                sourceNodeIndex = sourceNode.getParent().getChildren().indexOf(sourceNode);
                sourceNode.getParent().getChildren().remove(sourceNode);
            }
            // decrease drop position index if dragging from top to bottom inside the same parent node
            if (moveToTheSameParent && (sourceNodeIndex < targetIndex))
                targetIndex--;
            // if we drop source accurate below expanded target
            if (tree.isExpanded(targetItemId) && location == DropLocation.BELOW) {
                targetNode.insertChildAt(0, sourceNode);
            } else if (targetNode.getParent() == null) {
                sourceNode.parent = null;
                conditions.getRootNodes().add(targetIndex, sourceNode);
            } else {
                targetNode.getParent().insertChildAt(targetIndex, sourceNode);
            }
            refreshConditionsDs(tree, conditions);
        }
    });
}