Why is XKeysymToKeycode() making all of my keys lowercase?

原文地址::https://stackoverflow.com/questions/28258528/why-is-xkeysymtokeycode-making-all-of-my-keys-lowercase

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1down votefavorite

I'm currently having a problem with Xlib where whenever I call XKeysymToKeycode() and pass in an uppercase KeySym, it returns a lowercase KeyCode. Google doesn't really seem to have an answer to this question, or too much documentation at all on the functions I'm using, for that matter.

Here's the code I am using:

#include <ctype.h>#include <stdio.h>#include <stdlib.h>#include <X11/Xlib.h>#include <X11/Xutil.h>#include <X11/keysym.h>#include <X11/extensions/XTest.h>int main(void) {    Display *display;    char *ptr;    char c[2] = {0, 0};    KeySym ksym;    KeyCode kcode;    display = XOpenDisplay(0);    ptr = "Test";    while (*ptr) {        c[0] = *ptr;        ksym = XStringToKeysym(c);        printf("Before XKeysymToKeycode(): %s\n", XKeysymToString(ksym));        kcode = XKeysymToKeycode(display, ksym);        printf("Key code after XKeysymToKeycode(): %s\n", XKeysymToString(XKeycodeToKeysym(display, kcode, 0)));        ptr++;    }    XCloseDisplay(display);    return 0;}    

It can be compiled with gcc -o sendkeys sendkeys_min.c -lX11 -lXtst -g -Wall -Wextra -pedantic -ansi (Assuming it has been saved as sendkeys_min.c.)

The current output is the following:

Before XKeysymToKeycode(): TKey code after XKeysymToKeycode(): tBefore XKeysymToKeycode(): eKey code after XKeysymToKeycode(): eBefore XKeysymToKeycode(): sKey code after XKeysymToKeycode(): sBefore XKeysymToKeycode(): tKey code after XKeysymToKeycode(): t

The expected output, is, of course, that the first T in "Test" is still uppercase after being ran through XKeysymToKeycode(). (Note that this is not my actual program, but a simplified version for posting here. In the actual program, I am sending key events with the resulting keycode, and the keys sent still have the problem exhibited here (They all become lowercase))

1down votefavorite

I'm currently having a problem with Xlib where whenever I call XKeysymToKeycode() and pass in an uppercase KeySym, it returns a lowercase KeyCode. Google doesn't really seem to have an answer to this question, or too much documentation at all on the functions I'm using, for that matter.

Here's the code I am using:

#include <ctype.h>#include <stdio.h>#include <stdlib.h>#include <X11/Xlib.h>#include <X11/Xutil.h>#include <X11/keysym.h>#include <X11/extensions/XTest.h>int main(void) {    Display *display;    char *ptr;    char c[2] = {0, 0};    KeySym ksym;    KeyCode kcode;    display = XOpenDisplay(0);    ptr = "Test";    while (*ptr) {        c[0] = *ptr;        ksym = XStringToKeysym(c);        printf("Before XKeysymToKeycode(): %s\n", XKeysymToString(ksym));        kcode = XKeysymToKeycode(display, ksym);        printf("Key code after XKeysymToKeycode(): %s\n", XKeysymToString(XKeycodeToKeysym(display, kcode, 0)));        ptr++;    }    XCloseDisplay(display);    return 0;}    

It can be compiled with gcc -o sendkeys sendkeys_min.c -lX11 -lXtst -g -Wall -Wextra -pedantic -ansi (Assuming it has been saved as sendkeys_min.c.)

The current output is the following:

Before XKeysymToKeycode(): TKey code after XKeysymToKeycode(): tBefore XKeysymToKeycode(): eKey code after XKeysymToKeycode(): eBefore XKeysymToKeycode(): sKey code after XKeysymToKeycode(): sBefore XKeysymToKeycode(): tKey code after XKeysymToKeycode(): t

The expected output, is, of course, that the first T in "Test" is still uppercase after being ran through XKeysymToKeycode(). (Note that this is not my actual program, but a simplified version for posting here. In the actual program, I am sending key events with the resulting keycode, and the keys sent still have the problem exhibited here (They all become lowercase))