273 lines
6.6 KiB
Plaintext
273 lines
6.6 KiB
Plaintext
.ds tk X Toolkit
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xI Intrinsics
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.ds xW X Toolkit Athena Widgets \- C Language Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.ds Rn 3
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.ds Vn 2.2
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.hw XtMake-Geometry-Request XtQuery-Geometry wid-get
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.na
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.de Ds
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.nf
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.LP
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.ny0
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.TH XtSetValues 3Xt "Release 3" "X Version 11" "XT FUNCTIONS"
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.SH NAME
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XtSetValues, XtSetSubvalues, XtGetValues, XtGetSubvalues \- obtain and set widget resources
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.SH SYNTAX
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void XtSetValues(\fIw\fP, \fIargs\fP, \fInum_args\fP)
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.br
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Widget \fIw\fP;
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.br
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ArgList \fIargs\fP;
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.br
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Cardinal \fInum_args\fP;
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.LP
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void XtSetSubvalues(\fIbase\fP, \fIresources\fP, \fInum_resources\fP, \
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\fIargs\fP, \fInum_args\fP)
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.br
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XtPointer \fIbase\fP;
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.br
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XtResourceList \fIresources\fP;
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.br
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Cardinal \fInum_resources\fP;
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.br
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ArgList \fIargs\fP;
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.br
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Cardinal \fInum_args\fP;
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.LP
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void XtGetValues(\fIw\fP, \fIargs\fP, \fInum_args\fP)
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.br
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Widget \fIw\fP;
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.br
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ArgList \fIargs\fP;
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.br
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Cardinal \fInum_args\fP;
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.LP
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void XtGetSubvalues(\fIbase\fP, \fIresources\fP, \fInum_resources\fP, \
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\fIargs\fP, \fInum_args\fP)
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.br
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XtPointer \fIbase\fP;
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.br
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XtResourceList \fIresources\fP;
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.br
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Cardinal \fInum_resources\fP;
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.br
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ArgList \fIargs\fP;
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.br
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Cardinal \fInum_args\fP;
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.SH ARGUMENTS
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.ds Al of name/address pairs that contain the resource name \
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and either the address into which the resource value is to be stored \
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or their new values
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.IP \fIargs\fP 1i
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Specifies the argument list \*(Al.
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.ds Ba retrieved or written
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.IP \fIbase\fP 1i
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Specifies the base address of the subpart data structure where the resources
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should be \*(Ba.
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.IP \fInum_args\fP 1i
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Specifies the number of arguments in the argument list.
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.IP \fIresources\fP 1i
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Specifies the nonwidget resource list or values.
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.IP \fInum_resources\fP 1i
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Specifies the number of resources in the resource list.
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.IP \fIw\fP 1i
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Specifies the widget.
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.SH DESCRIPTION
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The
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.ZN XtSetValues
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function starts with the resources specified for the
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.ZN Core
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widget fields and proceeds down the subclass chain to the widget.
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At each stage,
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it writes the new value (if specified by one of the arguments) or the existing
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value (if no new value is specified) to a new widget data record.
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.ZN XtSetValues
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then calls the set_values procedures for the widget in superclass-to-subclass
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order.
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.IN "hook"
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If the widget has any non-NULL set_values_hook fields,
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these are called immediately after the
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corresponding set_values procedure.
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This procedure permits subclasses to set nonwidget data for
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.ZN XtSetValues .
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.LP
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If the widget's parent is a subclass of
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.ZN constraintWidgetClass ,
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.ZN XtSetValues
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also updates the widget's constraints.
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It starts with the constraint resources specified for
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.ZN constraintWidgetClass
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and proceeds down the subclass chain to the parent's class.
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At each stage,
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it writes the new value or the existing value to a new constraint record.
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It then calls the constraint set_values procedures from
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.ZN constraintWidgetClass
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down to the parent's class.
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The constraint set_values procedures are called with widget arguments,
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as for all set_values procedures, not just the constraint record arguments,
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so that they can make adjustments to the desired values based
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on full information about the widget.
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.LP
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.ZN XtSetValues
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determines if a geometry request is needed by comparing the current widget to
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the new widget.
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If any geometry changes are required,
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it makes the request, and the geometry manager returns
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.ZN XtGeometryYes ,
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.ZN XtGeometryAlmost ,
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or
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.ZN XtGeometryNo .
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If
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.ZN XtGeometryYes ,
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.ZN XtSetValues
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calls the widget's resize procedure.
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If
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.ZN XtGeometryNo ,
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.ZN XtSetValues
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resets the geometry fields to their original values.
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If
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.ZN XtGeometryAlmost ,
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.ZN XtSetValues
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calls the set_values_almost procedure,
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which determines what should be done and writes new values for the
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geometry fields into the new widget.
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.ZN XtSetValues
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then repeats this process,
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deciding once more whether the geometry manager should be called.
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.LP
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Finally, if any of the set_values procedures returned
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.ZN True ,
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.ZN XtSetValues
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causes the widget's expose procedure to be invoked by calling the Xlib
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.ZN XClearArea
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function on the widget's window.
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.LP
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The
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.ZN XtSetSubvalues
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function stores resources into the structure identified by base.
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.LP
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The
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.ZN XtGetValues
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function starts with the resources specified for the core widget fields
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and proceeds down the subclass chain to the widget.
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The value field of a passed argument list should contain the
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address into which to store the corresponding resource value.
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It is the caller's responsibility
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to allocate and deallocate this storage according to the size of the
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resource representation type used within the widget.
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.LP
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If the widget's parent is a subclass of
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.ZN constraintWidgetClass ,
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.ZN XtGetValues
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then fetches the values for any constraint resources requested.
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It starts with the constraint resources specified for
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.ZN constraintWidgetClass
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and proceeds down to the subclass chain to the parent's constraint resources.
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If the argument list contains a resource name that is not found in any of the
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resource lists searched,
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the value at the corresponding address is not modified.
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.IN "hook"
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Finally, if the get_values_hook procedures are non-NULL,
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they are called in superclass-to-subclass order after
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all the resource values have been fetched by
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.ZN XtGetValues .
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This permits a subclass to provide nonwidget resource data to
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.ZN XtGetValues .
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.LP
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The
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.ZN XtGetSubvalues
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function obtains resource values from the structure identified by base.
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.SH "SEE ALSO"
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.br
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\fI\*(xT\fP
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.br
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\fI\*(xL\fP
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