XtSetValues(3Xt) MIT X11R4 XtSetValues(3Xt)
XtSetValues, XtSetSubvalues, XtGetValues, XtGetSubvalues - obtain and set widget resources
void XtSetValues(w, args, num_args)
void XtSetSubvalues(base, resources, num_resources, args, num_args)
void XtGetValues(w, args, num_args)
void XtGetSubvalues(base, resources, num_resources, args, num_args)
args Specifies the argument list of name/address pairs that contain the resource name and either the address into which the resource
value is to be stored or their new values.
base Specifies the base address of the subpart data structure where the resources should be retrieved or written.
num_args Specifies the number of arguments in the argument list.
resources Specifies the nonwidget resource list or values.
Specifies the number of resources in the resource list.
w Specifies the widget.
The function starts with the resources specified for the widget fields and proceeds down the subclass chain to the widget. At each stage,
it writes the new value (if specified by one of the arguments) or the existing value (if no new value is specified) to a new widget data
record. then calls the set_values procedures for the widget in superclass-to-subclass order. If the widget has any non-NULL set_val-
ues_hook fields, these are called immediately after the corresponding set_values procedure. This procedure permits subclasses to set non-
widget data for
If the widget's parent is a subclass of also updates the widget's constraints. It starts with the constraint resources specified for and
proceeds down the subclass chain to the parent's class. At each stage, it writes the new value or the existing value to a new constraint
record. It then calls the constraint set_values procedures from down to the parent's class. The constraint set_values procedures are
called with widget arguments, as for all set_values procedures, not just the constraint record arguments, so that they can make adjustments
to the desired values based on full information about the widget.
determines if a geometry request is needed by comparing the current widget to the new widget. If any geometry changes are required, it
makes the request, and the geometry manager returns or If calls the widget's resize procedure. If resets the geometry fields to their
original values. If calls the set_values_almost procedure, which determines what should be done and writes new values for the geometry
fields into the new widget. then repeats this process, deciding once more whether the geometry manager should be called.
Finally, if any of the set_values procedures returned causes the widget's expose procedure to be invoked by calling the Xlib function on
the widget's window.
The function stores resources into the structure identified by base.
The function starts with the resources specified for the core widget fields and proceeds down the subclass chain to the widget. The value
field of a passed argument list should contain the address into which to store the corresponding resource value. It is the caller's
responsibility to allocate and deallocate this storage according to the size of the resource representation type used within the widget.
If the widget's parent is a subclass of then fetches the values for any constraint resources requested. It starts with the constraint
resources specified for and proceeds down to the subclass chain to the parent's constraint resources. If the argument list contains a
resource name that is not found in any of the resource lists searched, the value at the corresponding address is not modified. Finally, if
the get_values_hook procedures are non-NULL, they are called in superclass-to-subclass order after all the resource values have been
fetched by This permits a subclass to provide nonwidget resource data to
The function obtains resource values from the structure identified by base.
X Window System Toolkit: The Complete Programmer's Guide and Specification, Paul J. Asente and Ralph Swick
X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys