LabVIEW provides the basic tree item move VIs, but in the actual test project, there is more to be considered and much more work to do. In my project, I use a two level tree to store the test sequence, the top level is the test item’s category and the sub-level is the test items as the following picture.

Move test items up or down in this tree control must always keep the test items under the right category. In my program, when move a test item up or down, first check if the item is the top(for up) or bottom(for down) item, if true, no operation will be taken; then check if the item is the top(for up) or bottom(for down)item in it’s category(for clearance name it A), if false, just move the item up or down in it’s category(A), if true, create a new category(B) with the same category text before or after current category(A) and move the item to this category(B), and if the category(C) before or next to it  have more than one items, a new category(D) should be created after(for up) or before(for down) the category(B) the moved item under, and then move the last item(for up) or the first item(for down) to this category(D), and if the before or next category(C) has only one item, just move the newly created category(B) before or after the neighbor category. And if there is a category(E) before or after the neighbor category(C), check if the category(E) text is the same with the newly created category(B), if the same, the newly created category(B) should be merged into that category(E). It’s quite complex to explain it.

I just attached the VIs I created in this project, you can have much better understanding by it:Move Tree Item Up and Down VIs.

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