/* +-------------------------------------------------------------------+ */
/* | Copyright 1993, David Koblas (koblas@netcom.com)                  | */
/* |                                                                   | */
/* | Permission to use, copy, modify, and to distribute this software  | */
/* | and its documentation for any purpose is hereby granted without   | */
/* | fee, provided that the above copyright notice appear in all       | */
/* | copies and that both that copyright notice and this permission    | */
/* | notice appear in supporting documentation.  There is no           | */
/* | representations about the suitability of this software for        | */
/* | any purpose.  this software is provided "as is" without express   | */
/* | or implied warranty.                                              | */
/* |                                                                   | */
/* +-------------------------------------------------------------------+ */

#include <X11/Intrinsic.h>
#include <X11/Shell.h>
#include <X11/Xaw/Command.h>
#include <X11/Xaw/Toggle.h>
#include <X11/Xaw/Form.h>
#include <X11/Xaw/Label.h>
#include <X11/StringDefs.h>
#include <stdio.h>
#ifdef MISSING_STDARG_H
#include <varargs.h>
#else
#include <stdarg.h>
#endif
#include "misc.h"

/*
**  One standard generic dialog alert box.
*/
typedef struct {
	XtCallbackProc	okFunc, cancelFunc;
	void		*data;	
	Widget		parent, shell;
} arg_t;

static void commonCallback(XtCallbackProc f, arg_t *arg)
{
	void		*d = arg->data;
	Widget		p  = arg->parent;

	XtDestroyWidget(arg->shell);
	XtFree((XtPointer)arg);

	if (f != NULL)
		f(p, d, NULL);
}
static void cancelCallback(Widget w, XtPointer argArg, XtPointer junk2)
{
	arg_t	*arg = (arg_t *)argArg;

	commonCallback(arg->cancelFunc, arg);
}
static void okCallback(Widget w, XtPointer argArg, XtPointer junk2)
{
	arg_t	*arg = (arg_t *)argArg;

	commonCallback(arg->okFunc, arg);
}

void AlertBox(Widget parent, char *msg, XtCallbackProc okProc, XtCallbackProc nokProc, void *data)
{
	Position	x, y;
	Widget		shell;
	Widget		form, title, okButton = None, cancelButton = None;
	arg_t		*arg = XtNew(arg_t);
	
        XtVaGetValues(GetShell(parent), XtNx, &x, XtNy, &y, NULL);

        shell = XtVaCreatePopupShell("alert",
                        transientShellWidgetClass, GetShell(parent),
			XtNx, x,
			XtNy, y,
                        NULL);
        form = XtVaCreateManagedWidget(NULL,
                                formWidgetClass, shell,
                                XtNborderWidth, 0,
                                NULL);

	title = XtVaCreateManagedWidget("title",
				labelWidgetClass, form,
				XtNlabel, msg, 
				XtNborderWidth, 0,
				NULL);

	arg->shell = shell;
	arg->okFunc = okProc;
	arg->cancelFunc = nokProc;
	arg->parent = parent;
	arg->data = data;

	okButton = XtVaCreateManagedWidget("ok",
			commandWidgetClass, form,
			XtNfromVert, title,
			XtNlabel, "OK",
			/* XtNaccelerators, accel, */
			NULL);
	XtAddCallback(okButton, XtNcallback, okCallback, (XtPointer)arg);

	if (nokProc != NULL) {
		cancelButton = XtVaCreateManagedWidget("cancel",
				commandWidgetClass, form,
				XtNfromVert, title,
				XtNfromHoriz, okButton,
				XtNlabel, "Cancel",
				NULL);
		XtAddCallback(cancelButton, XtNcallback, cancelCallback, (XtPointer)arg);
	}


	AddDestroyCallback(shell, (void (*)(Widget, void *, XEvent *))cancelCallback, NULL);
	XtPopup(shell, XtGrabExclusive);
}

#ifdef MISSING_STDARG_H
void Notice(va_alist)
va_dcl
{
	static char	msg[512];
	va_list		ap;
	char		*fmt;
	Widget		w;

	va_start(ap);
	w   = va_arg(ap, Widget);
	fmt = va_arg(ap, char *);
	vsprintf(msg, fmt, ap);

	AlertBox(GetShell(w), msg, NULL, NULL, NULL);
}
#else
void Notice(Widget w, ...)
{
	static char	msg[512];
	va_list		ap;
	char		*fmt;

	va_start(ap, w);
	fmt = va_arg(ap, char *);
	vsprintf(msg, fmt, ap);

	AlertBox(GetShell(w), msg, NULL, NULL, NULL);
}
#endif