/*
* Window_With_Name: routine to locate a window with a given name on a display.
* If no window with the given name is found, 0 is returned.
* If more than one window has the given name, the first
* one found will be returned. Only top and its subwindows
* are looked at. Normally, top should be the RootWindow.
*/
Window Window_With_Name(
Display *disp,
Window top,
const char *name)
{
Window *children, dummy;
unsigned int nchildren;
unsigned int i;
Window w=0;
char *window_name;
if (XFetchName(disp, top, &window_name) && !strcmp(window_name, name))
return(top);
if (!XQueryTree(disp, top, &dummy, &dummy, &children, &nchildren))
return(0);
for (i=0; i<nchildren; i++) {
w = Window_With_Name(disp, children[i], name);
if (w)
break;
}
if (children) XFree ((char *)children);
return(w);
}
/*
* Select_Window_Args: a rountine to provide a common interface for
* applications that need to allow the user to select one
* window on the screen for special consideration.
* This routine implements the following command line
* arguments:
*
* -root Selects the root window.
* -id <id> Selects window with id <id>. <id> may
* be either in decimal or hex.
* -name <name> Selects the window with name <name>.
*
* Call as Select_Window_Args(&argc, argv) in main before
* parsing any of your program's command line arguments.
* Select_Window_Args will remove its arguments so that
* your program does not have to worry about them.
* The window returned is the window selected or 0 if
* none of the above arguments was present. If 0 is
* returned, Select_Window should probably be called after
* all command line arguments, and other setup is done.
* For examples of usage, see xwininfo, xwd, or xprop.
*/
Window Select_Window_Args(
int *rargc,
char **argv)
#define ARGC (*rargc)
{
int nargc=1;
int argc;
char **nargv;
Window w=0;
nargv = argv+1; argc = ARGC;
#define OPTION argv[0]
#define NXTOPTP ++argv, --argc>0
#define NXTOPT if (++argv, --argc==0) usage()
#define COPYOPT nargv++[0]=OPTION, nargc++
while (NXTOPTP) {
if (!strcmp(OPTION, "-")) {
COPYOPT;
while (NXTOPTP)
COPYOPT;
break;
}
if (!strcmp(OPTION, "-root")) {
w=RootWindow(dpy, screen);
continue;
}
if (!strcmp(OPTION, "-name")) {
NXTOPT;
w = Window_With_Name(dpy, RootWindow(dpy, screen),
OPTION);
if (!w)
Fatal_Error("No window with name %s exists!",OPTION);
continue;
}
if (!strcmp(OPTION, "-id")) {
NXTOPT;
w=0;
sscanf(OPTION, "0x%lx", &w);
if (!w)
sscanf(OPTION, "%lu", &w);
if (!w)
Fatal_Error("Invalid window id format: %s.", OPTION);
continue;
}
COPYOPT;
}
ARGC = nargc;
return(w);
}
int
main(int argc, char *argv[])
{
display = XOpenDisplay(0);
if (!display)
exit(EXIT_FAILURE);
Window window_root = DefaultRootWindow(display);
if (!window_root)
exit(EXIT_FAILURE);
Window window_found = Window_With_Name(display, window_root, “put here the name of the window”);
if (window_found)
{
XSetInputFocus(display, window_found, RevertToNone, CurrentTime);
WId windowWithName(const char *name)
{
return Window_With_Name(tqt_xdisplay(), tqt_xrootwin(), name);
}
