Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!iuvax!stung
From: stung@iuvax.cs.indiana.edu
Newsgroups: comp.windows.x
Subject: Athena text widget problem
Message-ID: <33500010@iuvax>
Date: 5 Jul 89 21:39:00 GMT
Organization: Indiana University CSCI, Bloomington
Lines: 82
Nf-ID: #N:iuvax:33500010:000:2402
Nf-From: iuvax.cs.indiana.edu!stung    Jul  5 16:39:00 1989



The following is a program that does not display the scroll bar of a text
widget properly. When running the program the X Toolkit gives this warning
message:
  No type converter registered for 'String' to 'Orientation' conversion.
However, if I use XtDefaultAppContext in stead of creating my own context
the program runs properly. 
  Do I miss somthing? 
  Thanks in advance for any help!!

Sho-Huan Tung (stung@iuvax.cs.indiana.edu)
Department of Computer Science
Indiana University

------------------------------------------------------------------
/* Includes for X Toolkits */
#include <stdio.h>
#include <X11/Intrinsic.h>
#include <X11/AsciiText.h>
#include <X11/Text.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>

#define MAXCHAR 60  /* This number need to be divideable by 2 and 3 */

char text_buf[MAXCHAR] = "> " ;

int create_text_widget(w)
int w;
{
    int n;
    Arg Xargs[10];
    Widget text_widget1;

    n = 0 ;
    XtSetArg(Xargs[n], XtNeditType, (XtArgVal) XttextEdit) ; n++;

    XtSetArg(Xargs[n], XtNlength, (XtArgVal)MAXCHAR) ; n++;
    XtSetArg(Xargs[n], XtNstring, text_buf); n++;
    XtSetArg(Xargs[n], XtNinsertPosition, 2); n++;
    text_widget1 = XtCreateManagedWidget("", asciiStringWidgetClass, 
			(Widget)w, Xargs, n);
    n = 0;
    XtSetArg(Xargs[n], XtNtextOptions, (XtArgVal)scrollVertical) ; n++; 
printf("before XtSetValue\n");
    XtSetValues(text_widget1, Xargs, n);
printf("after XtSetValue\n");
    return (int)text_widget1;
    }

void main(argc, argv)
    unsigned int argc;
    char **argv;
{
    Widget toplevel;
    XtAppContext SDefaultAppContext;
    Display *SDefaultDisplay;
    XEvent event;
    
    XtToolkitInitialize();

    SDefaultAppContext = XtCreateApplicationContext();
/*
 * If I change SDefaultAppContext to NULL in the following call, and replace
 * SDefalutAppContext in XtAppNextEvent with _XtDefaultAppContext(),
 * then the scroll bar display properly.
 */
    SDefaultDisplay = XtOpenDisplay(SDefaultAppContext, NULL, NULL, "Test1",
				  NULL, 0, &argc, argv);
/* need to make sure that SDefaultDisplay is not NULL */
    toplevel = XtAppCreateShell(NULL, 
				"Test1", applicationShellWidgetClass,
       			        SDefaultDisplay, NULL, 0);
    create_text_widget(toplevel);
    XtRealizeWidget(toplevel);
    for (;;) {
      XtAppNextEvent(SDefaultAppContext, &event);
      XtDispatchEvent(&event);
      }
}