DIVIDERS(2)DIVIDERS(2)NAME
Dividers - user-draggable tk dividing bars
SYNOPSIS
include "dividers.m";
dividers := load Dividers Dividers->PATH;
Divider: import dividers;
init: fn();
Divider: adt {
new: fn(win: ref Tk->Toplevel, w: string, wl: list of string, dir: int):
(ref Divider, chan of string);
event: fn(d: self ref Divider, e: string);
};
DESCRIPTION
Dividers presents an interface allowing Tk widgets to be arranged
within a window, divided by bars which can be dragged by the user to
determine the proportion of the available space to allocate to each
widget. The groups can be stacked vertically or horizontally. Divider
widgets can be nested.
Init must be called before anything else, to allow Dividers to ini‐
tialise its internal state. Divider.new creates a new divider widget;
it will be named w, and it will divide up the widgets named in the list
wl. Dir can be Dividers->NS, to stack the widgets one on top of
another, or Dividers->EW to stack the widgets left-right. Divider.new
returns a new Divider adt, and a channel through which Divider events
will be received. The application should arrange that events received
on this channel be passed to the event() function.
A Divider widget must be informed if its size has changed by configur‐
ing its width and height appropriately; it does the same to the items
it is dividing.
SOURCE
/appl/lib/dividers.b
BUGS
It should not be necessary to inform the Divider widget of size
changes.
The event-based mechanism seems somewhat contrary to the preferred
Limbo way of doing things.
DIVIDERS(2)
