Conference bulova::decw_jan-89_to_nov-90

  What are you passing in for DECTERM_CLASS and _NAME ?

The class is DXterm under Ultrix and DECW$TERMINAL under VMS.

I just glanced at the code at it _looks_ ok.

						-=> Jim <=-

re. 1

thankyou for confirming the class with me.  I found the ultrix class name in
the dxterm(1) reference section. Ithen changed my defines accordingly.

When this failed I tried replacing static definers with strings from the command
line.  So instead of :

	#define	DECTERM_CLASS "DXterm"
	#define DCCTERM_NAME "DECterm"

I have :

	#define DECTERM_CLASS ArgV[1]
	#define DECTERM_NAME ArgV[2]

So to use this program you would type from the command line :

	# walktree DXterm DECterm

And the application would print every occurance of such (or should).  To print
every class and name use :

	# walktree "" ""

this will supply two blank arguements to the program which interprets this as
meaning any class and any name.

I hope I havent stuffed up anything else along the way!

Walter

    This works for me:
    
    #define DECTERM_CLASS "DXterm"
    #define DECTERM_NAME "dxterm"
    
    bernie
    csc/cs
    

and not for me???

Here are my defines :


#ifndef DECTERM_CLASS
#define DECTERM_CLASS "DXterm"
#define DECTERM_NAME  "dxterm"
#endif

Here is a fragment of the code that walks the tree :

   ch.res_name = NULL;
   ch.res_class = NULL;

   if (XGetClassHint(display, window, &ch) == Success) {
      printf("class - \"%s\"\n", ch.res_class) ; /* debug print only */

      if (ch.res_class && strcmp(ch.res_class, DECTERM_CLASS) == 0) {
          printf("name - \"%s\"\n", ch.res_name) ; /* debug print only */

          if (ch.res_name && strcmp(ch.res_name, DECTERM_NAME) == 0) {
            name = NULL;
            XFetchName(display, window, &name);
            printf("window - %d, %s\n", window, name);  /* debug print only */

Here is a section of the output :

class - "(null)"
class - "(null)"
class - "(null)"
class - "(null)"
class - "(null)"
class - "(null)"
class - "(null)"
class - "(null)"
	.
	.
	.

And of course with the class always being equal to null this never gets to the
next if to test the name and so forth.  I added the printf statements to the
code just to see what was going on.  Not a lot as you can see!

I am using ULTRIX 4.0 what about you?

The entire code follows below if you are interested :

#ifndef DECTERM_CLASS
#define DECTERM_CLASS "DXterm"
#define DECTERM_NAME  "dxterm"
#endif

#include <stdio.h>
#include <signal.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>

static void WalkWindowTree();
static int count;

main(argc, argv)

unsigned int argc;
char *argv[];

{
Display *display;

   if (!(display = XOpenDisplay(NULL))) {
      fprintf(stderr, "Can't open display\n");
      exit(0);
   }

   WalkWindowTree(display, RootWindow(display, DefaultScreen(display)));
   exit(1);
}

static void WalkWindowTree(display, window)

Display *display;
Window window;

{
Window root, parent, *children;
int nchildren;
XClassHint ch;
char *name;

   ch.res_name = NULL;
   ch.res_class = NULL;

   if (XGetClassHint(display, window, &ch) == Success) {
      printf("class - \"%s\"\n", ch.res_class) ;
      if (ch.res_class && strcmp(ch.res_class, DECTERM_CLASS) == 0) {
         printf("name - \"%s\"\n", ch.res_name) ;
          if (ch.res_name && strcmp(ch.res_name, DECTERM_NAME) == 0) {
            name = NULL;
            XFetchName(display, window, &name);
            printf("window - %d, %s\n", window, name);
            if (name) XFree(name);
            printf("count = %d\n", count);

            if (count == 0){
                count = 1;
                printf("Window Popup \n");
                XRaiseWindow(display, window);
                XSetInputFocus(display, window, RevertToParent, CurrentTime);
                XFlush(display);
                sleep(5);
                XLowerWindow(display, window);
                XFlush(display);
                sleep(5);
            }
        }
     }

     if (ch.res_name)  XFree(ch.res_name);
     if (ch.res_class) XFree(ch.res_class);
  }

   XQueryTree(display, window, &root, &parent, &children, &nchildren);

   if (nchildren) {
      register int i;
      register Window *child;

      for (i = 0, child = children; i < nchildren; ++i, ++child)
         WalkWindowTree(display, *child);

      XFree(children);
   }

   return;
}

    I am running on a VAXstation, ULTRIX 4.0.  I had a 3.1 executable which
    I ran and worked just fine.  Recompiled under 4.0 and code no longer 
    works.  It looks like the class name for decterm has changed.  
    
    Does anyone know what's going on?
    
    bernie
    csc/cs
    
    

RE:     <<< Note 3525.4 by WPOPTH::ZAMBOTTI "It only works after you ask!" >>>
                           -< Why does it work for you... >-

>>   if (XGetClassHint(display, window, &ch) == Success) {

  Here is the problem.  XGetClassHint has a return status.  It will be
non-zero if successful and zero otherwise.

  Success is defined as zero in X.h.  This means that when XGetClassHint
IS successful (non-zero) the above test will always fail.

  Does this mean that Success is defined wrong ?  I'm not sure because
all the X.h's I could find all have Success defined as zero.

  Anyway, don't do the check against Success and it will work.

					-=> Jim <=-