What would be the easiest way for a parent control to fit its children (no
scroll bar - a component has to have the height of the sum of heights of
its children)?
For example: my main diagram element is a component which has a
compartment, and in that compartment i store its children. If i add the
component to the diagram with only one click (so that it has the default
size) then the component re-sizes according to its children (the desired
functionality); but if i drag the contours of the component or change its
dimensions with a mouse then when adding new children the component
retains its dimensions and a scroll bar appears.