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main.c
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main.c
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/* Simple XCB application drawing a box in a window */
/* to compile it use :
gcc -Wall x.conn -lxcb
*/
#include <xcb/xcb.h>
#include <xcb/xcb_keysyms.h>
#include <stdio.h>
#include <stdlib.h>
#include "keycodes.h"
#include "event_handler.c"
int close_window(xcb_generic_event_t*);
int output_string(xcb_generic_event_t*);
int done = 0;
int main(void)
{
xcb_connection_t *conn;
xcb_screen_t *screen;
xcb_window_t win;
xcb_gcontext_t gcontext;
xcb_generic_event_t *event;
uint32_t mask;
uint32_t values[2];
/* open connection with the server */
conn = xcb_connect(NULL,NULL);
if (xcb_connection_has_error(conn)) {
printf("Cannot open display\n");
exit(1);
}
/* get the first screen */
screen = xcb_setup_roots_iterator( xcb_get_setup(conn) ).data;
/* create black graphics gcontext */
gcontext = xcb_generate_id(conn);
win = screen->root;
mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
values[0] = screen->black_pixel;
values[1] = 0;
xcb_create_gc(conn, gcontext, win, mask, values);
/* create window */
win = xcb_generate_id(conn);
mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
values[0] = screen->white_pixel;
values[1] = XCB_EVENT_MASK_EXPOSURE
| XCB_EVENT_MASK_KEY_PRESS
| XCB_EVENT_MASK_KEY_RELEASE;
xcb_create_window(conn, screen->root_depth, win, screen->root,
10, 10, 100, 100, 1,
XCB_WINDOW_CLASS_INPUT_OUTPUT, screen->root_visual,
mask, values);
/* map (show) the window */
xcb_map_window(conn, win);
xcb_flush(conn);
cterm_add_event_listener(XCB_KEY_PRESS, output_string);
cterm_add_event_listener(XCB_KEY_PRESS, close_window);
/* event loop */
while (!done) {
event = xcb_poll_for_event(conn);
if(event == NULL) continue;
cterm_handle_event(event);
free(event);
}
/* close connection to server */
xcb_disconnect(conn);
cterm_free_event_handlers();
return 0;
}
int close_window(xcb_generic_event_t* event)
{
xcb_button_press_event_t *bp = (xcb_button_press_event_t *)event;
if(bp->detail == KEYCODE_ESC)
{
done = 1;
return 1;
}
return 0;
}
int output_string(xcb_generic_event_t* event)
{
xcb_button_press_event_t *bp = (xcb_button_press_event_t *)event;
static char* string;
xcb_key_symbols_t sym;
printf("%i %c\n", bp->detail,xcb_key_symbols_get_keycode(bp->detail,&sym, 0));
return 0;
}