Create Image Button With XCB

/* GIMP RGBA C-Source image dump (MacButton_Normal.c) */

#include <xcb/xcb.h>
#include <xcb/xcb_atom.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


static const struct {
  unsigned int   width;
  unsigned int   height;
  unsigned int   bytes_per_pixel; /* 3:RGB, 4:RGBA */
  unsigned char  pixel_data[1 * 35 * 4 + 1];
} macBtnNormal = {
  1, 35, 4,
  "{{{\377\204\204\204\377\212\212\212\377\210\210\210\377\204\204\204\377\201"
  "\201\201\377\177\177\177\377|||\377zzz\377xxx\377www\377vvv\377ttt\377ss"
  "s\377sss\377rrr\377ooo\377```\377^^^\377___\377```\377```\377aaa\377bbb\377"
  "ccc\377eee\377ggg\377iii\377lll\377nnn\377ppp\377uuu\377rrr\377ddd\377\300"
  "\300\300\377",
};

static const struct {
    unsigned int     width;
    unsigned int     height;
    unsigned int     bytes_per_pixel; /* 3:RGB, 4:RGBA */
    unsigned char    pixel_data[1 * 35 * 4 + 1];
} macBtnHilite = {
    1, 35, 4,
    "\232\\u\377\245c}\377\253i\203\377\252f\201\377\245c}\377\242`z\377\240^"
    "x\377\233]v\377\230\\t\377\225[r\377\224Zq\377\222Zp\377\217Yo\377\216Xn"
    "\377\216Xn\377\214Xm\377\211Uj\377xH[\377vFY\377wGZ\377xH[\377xH[\377yI\\"
    "\377{I]\377{K^\377~L`\377\200Nb\377\202Pc\377\205Sf\377\207Uh\377\212Vk\377"
    "\221Yo\377\214Xm\377}K_\377\331\247\273\377",
};

static uint8_t* btnNormalData = (uint8_t*)macBtnNormal.pixel_data;
static uint8_t* btnHiliteData = (uint8_t*)macBtnHilite.pixel_data;

xcb_connection_t* conn;
xcb_window_t win;
xcb_screen_t* screen;

int main(int argc, const char** argv)
{
    xcb_generic_event_t* evt;
    xcb_gcontext_t gc;
    xcb_pixmap_t pm, pm2;
    xcb_window_t btn_test;
    uint32_t i;
    xcb_generic_error_t* err;
    xcb_void_cookie_t cookie;

    uint32_t values[] = {
        0xc0c0c0,
        XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS |
        XCB_EVENT_MASK_KEY_RELEASE | XCB_EVENT_MASK_BUTTON_PRESS |
        XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_ENTER_WINDOW |
        XCB_EVENT_MASK_LEAVE_WINDOW,
        0, 0, 0, 0
    };

    if (((conn = xcb_connect(NULL, NULL)) == NULL) || (xcb_connection_has_error(conn))) {
        fprintf(stderr, "Could not connect X Server\n");
        return -1;
    }

    screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;

    win = xcb_generate_id(conn);
    pm = xcb_generate_id(conn);
    pm2 = xcb_generate_id(conn);
    btn_test = xcb_generate_id(conn);
    gc = xcb_generate_id(conn);

    xcb_create_window(conn, 0, win,
                      screen->root,
                      100, 100, 500, 180,
                      1, XCB_WINDOW_CLASS_INPUT_OUTPUT,
                      screen->root_visual,
                      XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK,
                      values);
    xcb_change_property(conn, XCB_PROP_MODE_REPLACE, win,
                        WM_NAME, STRING, 8, strlen("XCB Button Test"),
                        "XCB Button Test");

    xcb_create_gc(conn, gc, win, 0, NULL);
    xcb_create_pixmap(conn, screen->root_depth,
                      pm, win, 1, 35);
    xcb_create_pixmap(conn, screen->root_depth, pm2, win, 1, 35);

    cookie = xcb_put_image_checked(conn, 2, pm,
                                   gc, 1, 35, 0, 0, 0,
                                   screen->root_depth,
                                   35*4, btnNormalData);
    if (err = xcb_request_check(conn, cookie)) {
        fprintf(stderr, "Unable to put image into drawable %u\nError %d\n",
                pm, err->error_code);
        free(err);
        return -1;
    }

    cookie = xcb_put_image_checked(conn, 2, pm2,
                                   gc, 1, 35, 0, 0, 0,
                                   screen->root_depth,
                                   35*4, btnHiliteData);
    if (err = xcb_request_check(conn, cookie)) {
        fprintf(stderr, "Unable to put image into drawable %u\nError %d\n",
                pm2, err->error_code);
        free(err);
        return -1;
    }

    values[0] = pm;
    xcb_create_window(conn, 0, btn_test,
                      win, 500-90, 180-55, 70, 35,
                      1, XCB_WINDOW_CLASS_INPUT_OUTPUT,
                      screen->root_visual,
                      XCB_CW_BACK_PIXMAP | XCB_CW_EVENT_MASK,
                      values);
    xcb_map_subwindows(conn, win);
    xcb_map_window(conn, win);
    xcb_flush(conn);

    while (evt = xcb_wait_for_event(conn)) {
        int ntype = evt->response_type & ~0x80;
        if (ntype == XCB_BUTTON_PRESS) {
            xcb_button_press_event_t* event = (xcb_button_press_event_t*)evt;
            if (event->event == btn_test)
                break;
        } else if (ntype == XCB_ENTER_NOTIFY) {
            xcb_enter_notify_event_t* event = (xcb_enter_notify_event_t*)evt;
            uint32_t vals[] = { pm2 };
            if (event->event == btn_test) {
                /* change the BACK_PIXMAP property into using pm2... */
                fprintf(stdout, "Event->window == btn_test, change the image\n");
                xcb_change_window_attributes(conn, btn_test, XCB_CW_BACK_PIXMAP, vals);
                xcb_clear_area(conn, 1, btn_test, 0, 0, 70, 35);
                xcb_flush(conn);
            }
        } else if (ntype == XCB_LEAVE_NOTIFY) {
            xcb_leave_notify_event_t* event = (xcb_leave_notify_event_t*)evt;
            uint32_t vals[] = { pm };
            if (event->event == btn_test) {
                /* change the BACK_PIXMAP property into using pm2... */
                fprintf(stdout, "Event->window == btn_test, change the image\n");
                xcb_change_window_attributes(conn, btn_test, XCB_CW_BACK_PIXMAP, vals);
                xcb_clear_area(conn, 1, btn_test, 0, 0, 70, 35);
                xcb_flush(conn);
            }
        }
        free(evt);
    }

    xcb_destroy_window(conn, win);
    xcb_disconnect(conn);
    return 0;
}