XtSetValues(3Xt) X11 SDE 5.4R3.00 XtSetValues(3Xt)
NAME
XtSetValues, XtSetSubvalues, XtGetValues, XtGetSubvalues - obtain and
set widget resources
SYNTAX
void XtSetValues(w, args, numargs)
Widget w;
ArgList args;
Cardinal numargs;
void XtSetSubvalues(base, resources, numresources, args, numargs)
XtPointer base;
XtResourceList resources;
Cardinal numresources;
ArgList args;
Cardinal numargs;
void XtGetValues(w, args, numargs)
Widget w;
ArgList args;
Cardinal numargs;
void XtGetSubvalues(base, resources, numresources, args, numargs)
XtPointer base;
XtResourceList resources;
Cardinal numresources;
ArgList args;
Cardinal numargs;
ARGUMENTS
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.
numargs Specifies the number of arguments in the argument list.
resources Specifies the nonwidget resource list or values.
numresources
Specifies the number of resources in the resource list.
w Specifies the widget.
DESCRIPTION
The XtSetValues function starts with the resources specified for the
Core 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. XtSetValues then calls the
set_values procedures for the widget in superclass-to-subclass order.
If the widget has any non-NULL set_values_hook fields, these are
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XtSetValues(3Xt) X11 SDE 5.4R3.00 XtSetValues(3Xt)
called immediately after the corresponding set_values procedure.
This procedure permits subclasses to set nonwidget data for
XtSetValues.
If the widget's parent is a subclass of constraintWidgetClass,
XtSetValues also updates the widget's constraints. It starts with
the constraint resources specified for constraintWidgetClass 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 constraintWidgetClass 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.
XtSetValues 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
XtGeometryYes, XtGeometryAlmost, or XtGeometryNo. If XtGeometryYes,
XtSetValues calls the widget's resize procedure. If XtGeometryNo,
XtSetValues resets the geometry fields to their original values. If
XtGeometryAlmost, XtSetValues calls the set_values_almost procedure,
which determines what should be done and writes new values for the
geometry fields into the new widget. XtSetValues then repeats this
process, deciding once more whether the geometry manager should be
called.
Finally, if any of the set_values procedures returned True,
XtSetValues causes the widget's expose procedure to be invoked by
calling the Xlib XClearArea function on the widget's window.
The XtSetSubvalues function stores resources into the structure
identified by base.
The XtGetValues 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 constraintWidgetClass,
XtGetValues then fetches the values for any constraint resources
requested. It starts with the constraint resources specified for
constraintWidgetClass 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 XtGetValues. This permits a subclass to provide
nonwidget resource data to XtGetValues.
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XtSetValues(3Xt) X11 SDE 5.4R3.00 XtSetValues(3Xt)
The XtGetSubvalues function obtains resource values from the
structure identified by base.
SEE ALSO
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
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