Move Nodes Up and Down

URCap Development Java
1

Hello,

Is anyone able to help with the code that allows you to move a node up and down exactly as the buttons below do?

20210503_084743
20210503_084743717×1082 339 KB

Thank you in advance.

Best regards.

2

Under certain circumstance, this use-case makes sense, i might find a feasible solution:

public void onMoveNodeClick(boolean is_move_up) {
		final TreeNode cn = apiProvider.getProgramAPI().getProgramModel().getRootTreeNode(this);
//find current node

		undoRedoManager.recordChanges(new UndoableChanges() {
			
			@Override
			public void executeChanges() {
				// TODO Auto-generated method stub
				try {
					parent.setChildSequenceLocked(false);
					treeindex = -1; 
// let a private variable to find current node's index
					parent.traverse(new ProgramNodeVisitor() {
						public void visit(URCapProgramNode pn, int index, int depth) {
							if(pn.canGetAs(Search1RotationCustomerAPI.class)) {

// it requires that every node in the sub-tree needs to have unique ID, i.e., here i make it into Display name.								
if(pn.getAs(Search1RotationCustomerAPI.class).getDisplayName().equals(getDisplayName())) {
									treeindex = index;
									System.out.println("Current tree index is: "+index);
								}
							}
						}
					});
					if(is_move_up) {
						if(treeindex > 0) {
							TreeNode toMove = parent.getChildren().get(treeindex-1);
							parent.removeChild(cn);
							parent.insertChildBefore(toMove, cn.getProgramNode());
						}
					}else {
						if(treeindex < (parent.getChildren().size()-1)) {
							TreeNode toMove = parent.getChildren().get(treeindex+1);
							parent.removeChild(cn);
							parent.insertChildAfter(toMove, cn.getProgramNode());
						}
					}
					parent.setChildSequenceLocked(true);
				}catch(TreeStructureException e15) {
					e15.printStackTrace();
				}
			}
		});
	}

As a result:

move-up-down