Auto sizing of positions regarding contained items

Hello,
 
What i want to do is automatically resize individual positions so the contained items are all displayed with all contents visible (even if there are conflicts between the items). Currently it sizes so that there are no scroll bars. If that is not automatically possible, i can calculate the individual widths of the positions, but how can i set these at
runtime after filling the items in the planner?
 
Thanks in advance for any assistance.