How to control the position of the nodes during the axpend process and the collapsed for the cilldren of node that is collapsed and the nodes that from both sides to the node that was clicked on

[Hamzah244]

I am using indented layout and i want to control the collapse and expand behavior for the nodes position, like i want when the user clicked the collapse button the nodes from both sides not change the x and y position until I chang it by my condition, and the children position for the nodes that will be expand...

[Hamzah244]

I want to know how can I control the node position in the Indented layout...
when collapsed or expand the nodes children for the parent node...

Because I don't want the under nodes to be move under, if the upper node is expand, only if the under node is also expand it will move to under the upper node that is expand and expand the nodes children...

Is this details is understandable?