Flex: Prevent scrollbar from covering content when automatically displayed

Question

I have a canvas in Flex that shall be able only to be scrolled in vertical direction, so I set the attributes of the canvas as follows:

verticalScrollPolicy=         


        

Answer 1

Just a side note regarding this issue: it's actually not a bug, but known (and intended?) behaviour:

"Flex considers scroll bars in its sizing calculations only if you explicitly set the scroll policy to ScrollPolicy.ON. So, if you use an auto scroll policy (the default), the scroll bar overlaps the buttons. To prevent this behavior, you can set the height property for the HBox container or allow the HBox container to resize by setting a percentage-based width. Remember that changing the height of the HBox container causes other components in your application to move and resize according to their own sizing rules."

-- From Sizing Components in the Flex 3 help, under "Using Scroll bars"