Ivor
I do not think that this callback will help you to 'wrap' a toolbar.
Off hand I cannot think of a way to do this in ClearWin+ other than by having two versions
of the whole window, one for each case. This sounds messy but it is not difficult to implement
and probably will display quickly.
I can give you some information about the 'overall' callback but I have not tried it for myself.
The options [const_width] and [const_height] were introduced as an easier way to get a
similar effect to that of using the overall callback.
In the general case, the supplied images are of varying widths and heights and ClearWin+ has
two mechanisms for adjusting the image sizes to create a rectangular grid. One is to use [const_width]
and/or [const_height], the other is to use the 'overall' callback. For the varying widths, the callback passes the maximum width on each column. For the varying heights, the callback passes the maximum height on each row.
You get these values by setting opt=0 in the call. i.e. you receive the default values.
You set these values by assigning new values to the arrays and by making a call with opt=1.
This allows you to control the width of each column and the height of each row but it does not have any impact on the ability to wrap.
