Returns the allowed widget size or may be NULL
if the requesting widget is not interested in handling
Specifies the desired widget geometry (size, position, border width,
and stacking order).
Specifies the widget that is making the request.
Return the allowed widget width and height.
Depending on the condition,
performs the following:
If the widget is unmanaged or the widget's parent is not realized,
it makes the changes and returns
If the parent is not a subclass of
or the parent's geometry_manager is NULL,
it issues an error.
If the widget's being_destroyed field is
If the widget x, y, width, height and border_width fields are
all equal to the requested values,
otherwise, it calls the parent's geometry_manager procedure
with the given parameters.
If the parent's geometry manager returns
is not set in the request_mode
and if the widget is realized,
Xlib function to reconfigure the widget's window (set its size, location,
and stacking order as appropriate).
If the geometry manager returns
the change has been approved and actually has been done.
In this case,
does no configuring and returns
returns the resulting value from the parent's geometry manager.
Children of primitive widgets are always unmanaged; thus,
when called by a child of a primitive widget.
function, a simple interface to
structure and specifies that width and height should change.
The geometry manager is free to modify any of the other window attributes
(position or stacking order) to satisfy the resize request.
If the return value is
width_return and height_return contain a compromise width and height.
If these are acceptable,
the widget should immediately make an
and request that the compromise width and height be applied.
If the widget is not interested in
it can pass NULL for width_return and height_return.