Creating a Rendition

The following code creates an XmLabel whose XmNlabelString is of the type XmCHARSET_TEXT, using the Rendition whose tag is “ArabicShaped.” The Rendition is created with an XmNlayoutAttrObject of “ar” (corresponding to the locale name for the Arabic locale) and a layout modifier string that specifies for the output buffer a Numerals value of NUMERALS_CONTEXTUAL and a ShapeCharset value of “unicode-3.0.”

The locale-specific layout module transforms its input text into an output buffer of physical characters encoded using the 16-bit Unicode 3.0 codeset. Because an explicit layout locale has been specified, this text is rendered properly independent of the runtime locale setting. In this example, the input is encoded in ISO 8859–6.

int n;
Arg args[10];
Widget w;
XmString labelString;
XmRendition rendition;
XmStringTag renditionTag;
XmRenderTable renderTable;
      /* alef lam baa noon taa - iso8859-6 */
labelString = XmStringGenerate("\307\344\310\346\312\", NULL
			                          XmCHARSET_TEXT, "ArabicShaped");
w = XtVaCreateManagedWidget("a label", xmLabelWidgetClass, parent,
                             XmNlabelString, labelString,
		                          XmNlabelType, XmSTRING,
                             NULL);
n = 0;
XtSetArg(args[n], XmNfontName, "-*-*-medium-r-normal-*-24-*-*-*-*-*-*");
      n++;
XtSetArg(args[n], XmNfontType, XmFONT_IS_XOC); n++;
XtSetArg(args[n], XmNlayoutAttrObject, "ar"); n++;
XtSetArg(args[n], XmNlayoutModifier, 
          "@ls numerals=:contextual, shapecharset=iso8859-6"); n++;
renditionTag = (XmStringTag) "ArabicShaped";
rendition = XmRenditionCreate(w, renditionTag, argcs
s, n);
renderTable = 
    XmRenderTableAddRenditions(NULL, &rendition, 1, XmREPLACE_MERGE);
XtVaSetValues(w, XmNrenderTable, renderTable, NULL);

Editing a Rendition

The following code creates a TextField widget and a RenderTable with a single Rendition. Both the XmNlayoutAttrObject and XmNlayoutModifier pseudo resources have been left unspecified and therefore default to NULL. This value means the layout object associated with the Rendition belongs to the default locale, if one exists.

For this example to work properly, the locale must be set to one whose codeset is ISO 8859-6 and whose locale-specific layout module can support the IMPLICIT_BASIC algorithm. The Rendition's LayoutObject's ImplicitAlg value is modified through the Rendition's XmNlayoutModifier pseudo resource.

int n;
Arg args[10];
Widget w;
	XmRendition rendition;
XmStringTag renditionTag;
XmRenderTable renderTable;
w = XmCreateTextField(parent, "text field", args, 0);
n = 0;
	XtSetArg(args[n], XmNfontName, "-*-*-medium-r-normal-*-24-*-*-*-*-*-*-*");
     n++;
	XtSetArg(args[n], XmNfontType, XmFONT_IS_XOC); n++;
renditionTag = (XmStringTag) "ArabicShaped";
rendition = XmRenditionCreate(w, renditionTag, args, n);
renderTable = 
    XmRenderTableAddRenditions(NULL, &rendition, 1, XmREPLACE_MERGE);
XtVaSetValues(w, XmNrenderTable, renderTable, NULL);
	....
n = 0;
XtSetArg(args[n], XmNlayoutModifier, "@ls implicitalg=basic");
     n++;
XmRenditionUpdate(rendition, args, n);