XmeToHorizontalPixels(3X) UNIX System V XmeToHorizontalPixels(3X)
NAME
XmeToHorizontalPixels - Converts from real-world dimensions
to pixels
SYNOPSIS
#include <Xm/XmP.h>
XmImportOperator XmeToHorizontalPixels(
Widget widget,
int offset,
XtArgVal *value);
VERSION
This page documents Motif 2.1.
DESCRIPTION
XmeToHorizontalPixels converts a horizontal distance from a
real-world dimensional unit (such as thousandths of an inch)
to pixels. This conversion is based on the horizontal
resolution of the screen. The choice of real-world
dimensional unit is stored in the XmNunitTyperesource.
For example, suppose that widget has an XmNunitType resource
value of Xm1000TH_INCHES. If the input value were 2000
(meaning 2000/1000 inches or 2 inches), then
XmeToHorizontalPixels determines how many horizontal pixels
fall within 2 inches. Because different screens have
different resolutions, the returned value might be 160
pixels on one screen and 200 pixels on another.
XmeToHorizontalPixels is an XmImportProc.
Typically, your widget will call this function from a
synthetic resource record.
widget Specifies the widget containing the resource named
by offset.
offset Specifies the offset (in bytes) of a synthetic
resource field in the widget record.
value Specifies a value in the XmNunitType real-world
dimensional units used by widget and returns a
value in pixels.
RETURN
Returns one of the following XmImportOperator values:
XmSYNTHETIC_NONE
The caller of the XmImportProc is not responsible
for copying the converted value into the resource
specified by offset.
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XmeToHorizontalPixels(3X) UNIX System V XmeToHorizontalPixels(3X)
XmSYNTHETIC_LOAD
The caller of the XmImportProc is responsible for
copying the converted value into the resource
specified by offset.
Motif's synthetic resource mechanism is typically the caller
of XmeToHorizontalPixels. Therefore, if
XmeToHorizontalPixels returns XmSYTHETIC_LOAD, Motif
synthetic resource mechanism will take care of copying (and
casting) value into the resource symbolized by offset.
RELATED
XmeFromHorizontalPixels(3), XmeFromVerticalPixels(3), and
XmeToVerticalPixels(3).
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