Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!ucbvax!isi.com!tsang
From: tsang@isi.com (Kam C. Tsang)
Newsgroups: comp.windows.x.motif
Subject: optimization / speedups
Message-ID: <9008162309.AA22763@canopus>
Date: 16 Aug 90 23:09:54 GMT
References: <9008160310.AA05073@alphalpha.com>
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: inet
Organization: The Internet
Lines: 100

> Secondly, is there anyway for my application to check and see if a
> particular resource has been defined, so that it can set the resource
> only if the user has not?

Let me cheat and answer only the second question, because I have no
clue on the first one.  The call is XtGetSubresources:

-------------------- start of demo program ------------------------------

#include <Xm/Xm.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>

typedef struct {
} ApplicationData, *ApplicationDataPtr;

ApplicationData AppData;

#define XtNusername "username"
#define XtCUsername "Username"
#define XtNdebug "debug"
#define XtCDebug "Debug"

/* In intrinsic.h:
   typedef struct _XtResource {
       String     resource_name;  // Resource name
       String     resource_class; // Resource class
       String     resource_type;  // Representation type desired
       Cardinal   resource_size;  // Size in bytes of representation
       Cardinal   resource_offset;// Offset from base to put resource value
       String     default_type;   // representation type of specified default
       caddr_t    default_addr;   // Address of default resource
   } XtResource;
 */

static XtResource resources[] = {
   { 
      XtNusername,
      XtCUsername,			     
      XmRString,			     
      sizeof(String),			     
      XtOffset(ApplicationDataPtr, username),
      XmRString,			     
      "Number Johnny Five",		     
   },
   {
      XtNdebug,
      XtCDebug,
      XtRBoolean,
      sizeof(Boolean),
      XtOffset(ApplicationDataPtr, debug),
      XtRImmediate,
      (caddr_t) FALSE,
   }
};

/* see page 88 */


/*-------------------------------------------------------------
**	main		- main logic for application
*/
void main (argc,argv) 
	unsigned int	argc;
	char 		**argv;
{
   Display		*display;	/*  Display		*/
   Widget		app_shell;	/*  ApplicationShell	*/
   
   XtToolkitInitialize();
   display = XtOpenDisplay (NULL, NULL, argv[0], "XMdemos", NULL, 0,
			    &argc, argv);
   
   if (!display) {
      XtWarning ("xfonts: Can't open display, exiting...");
      exit (0);
   }

   app_shell = XtAppCreateShell (argv[0], "XMdemos",
				 applicationShellWidgetClass, display,
				 NULL, 0);
   
   XtGetSubresources(app_shell,
		     &AppData,
		     "Bboard.Label", "bboard.label", /* extra for XtGetSubresources */
		     resources,
		     XtNumber(resources),
		     NULL,
		     0);
   printf("width:  %d\n", AppData.width);
   printf("height: %d\n", AppData.height);
}

-------------------- end of demo program ------------------------------
-kam
     --------------------------------------------------------------
     Kam Tsang                           User Interface Group             
     Tel:        (408) 980-1500 x275     Integrated Systems, Inc.         
     Internet:   tsang@isi.com           2500 Mission College Blvd.       
     Voice mail: (408) 980-1590 x275     Santa Clara, CA 94054