Correction de rafraich.c
/* rafraichit le contenu de la fenetre apres masquage */
#include <stdio.h>
#include <X11/Xlib.h>
GC gc;
Display *display;
int screen;
Window win, root;
unsigned long white_pixel, black_pixel;
int tab_button[10][2];
int i, pos_tab;
main() {
for (i = 0; i < 10; ++i)
tab_button[i][0] = -1;
pos_tab = 9;
if ((display = XOpenDisplay ("")) == NULL) {
fprintf (stderr, "Can't open Display\n");
exit (1);
}
gc = DefaultGC (display, screen);
screen = DefaultScreen (display);
root = RootWindow (display, screen);
white_pixel = WhitePixel (display, screen);
black_pixel = BlackPixel (display, screen);
win = XCreateSimpleWindow (display, root,
0, 0, 100, 90, 2, black_pixel, white_pixel);
XSelectInput (display, win, ExposureMask | ButtonPressMask);
XStoreName (display, win, "rafraich");
XMapWindow (display, win);
for (;;) {
XEvent ev;
XNextEvent (display, &ev);
switch (ev.type) {
case Expose :
XDrawString (display, win, gc, 10, 30, "Hello !", 7);
for (i = 0; i < 10; ++i)
if (tab_button[i][0] > -1)
XDrawString (display, win, gc, tab_button[i][0], tab_button[i][1],
"ici", 3);
break;
case ButtonPress :
XDrawString (display, win, gc, ev.xbutton.x, ev.xbutton.y, "ici", 3);
pos_tab = (pos_tab + 1) % 10;
tab_button[pos_tab][0] = ev.xbutton.x;
tab_button[pos_tab][1] = ev.xbutton.y;
break;
default :
break;
}
}
}