void
main(int argc, char* argv[])
{
Display* display; /* pointer to X Display structure. */
int screen_num; /* number of screen to place the window on. */
Window win; /* pointer to the newly created window. */
unsigned int display_width,
display_height; /* height and width of the X display. */
unsigned int width, height; /* height and width for the new window. */
char *display_name = getenv("DISPLAY"); /* address of the X display. */
GC gc, rev_gc; /* GC (graphics context) used for drawing */
/* in our window. */
short pixels[1000][1000]; /* used to store pixels on screen that were */
/* explicitly drawn or erased by the user. */
/* initialize the 'pixels' array to contain 0 values. */
{
int x, y;
for (x=0; x<1000; x++)
for (y=0; y<1000; y++)
pixels[x][y] = 0;
}
/* open connection with the X server. */
display = XOpenDisplay(display_name);
if (display == NULL) {
fprintf(stderr, "%s: cannot connect to X server '%s'\n",
argv[0], display_name);
exit(1);
}
/* get the geometry of the default screen for our display. */
screen_num = DefaultScreen(display);
display_width = DisplayWidth(display, screen_num);
display_height = DisplayHeight(display, screen_num);
/* make the new window occupy 1/9 of the screen's size. */
width = (display_width / 3);
height = (display_height / 3);
printf("window width - '%d'; height - '%d'\n", width, height);
/* create a simple window, as a direct child of the screen's */
/* root window. Use the screen's white color as the background */
/* color of the window. Place the new window's top-left corner */
/* at the given 'x,y' coordinates. */
win = create_simple_window(display, width, height, 0, 0);
/* allocate two new GCs (graphics contexts) for drawing in the window. */
/* the first is used for drawing black over white, the second is used */
/* for drawing white over black. */
gc = create_gc(display, win, 0);
rev_gc = create_gc(display, win, 1);
/* subscribe to the given set of event types. */
XSelectInput(display, win, ExposureMask | KeyPressMask |
ButtonPressMask | Button1MotionMask |
Button2MotionMask | Button3MotionMask | StructureNotifyMask);
/* perform an events loop */
{
int done = 0;
XEvent an_event;
while (!done) {
XNextEvent(display, &an_event);
switch (an_event.type) {
case Expose:
/* redraw our window. */
handle_expose(display, gc, rev_gc, (XExposeEvent*)&an_event.xexpose,
width, height, pixels);
break;
case ConfigureNotify:
/* update the size of our window, for expose events. */
width = an_event.xconfigure.width;
height = an_event.xconfigure.height;
break;
case ButtonPress:
/* invert the pixel under the mouse pointer. */
handle_button_down(display, gc, rev_gc,
(XButtonEvent*)&an_event.xbutton,
width, height, pixels);
break;
case MotionNotify:
/* invert the pixel under the mouse pointer. */
handle_drag(display, gc, rev_gc,
(XButtonEvent*)&an_event.xbutton,
width, height, pixels);
break;
case KeyPress:
/* exit the application by braking out of the events loop. */
done = 1;
break;
default: /* ignore any other event types. */
break;
} /* end switch on event type */
} /* end while events handling */
}
/* free the GCs. */
XFreeGC(display, gc);
XFreeGC(display, rev_gc);
/* close the connection to the X server. */
XCloseDisplay(display);
}
int main(int argc, char* argv[]) {
int sockfd, oldsockfd, portno, n;
socklen_t clilen;
struct sockaddr_in serv_addr, cli_addr;
struct hostent *server;
pthread_t recv_thread;
Colormap map;
Display* display;
int screen_num;
Window win;
unsigned int display_width, display_height;
unsigned int width, height;
char *display_name = getenv("DISPLAY");
GC gc, his_gc, refresh_gc;
if(argc == 2) { // We are server
sending = 1;
if(argc < 2) {
fprintf(stderr,"ERROR, no port provided\n");
exit(1);
}
oldsockfd = socket(AF_INET, SOCK_STREAM, 0);
if(oldsockfd < 0) error("ERROR opening socket");
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
int on = 1;
if(setsockopt(oldsockfd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on)) < 0) error("ERROR on sockopt");
if(bind(oldsockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) error("ERROR on binding");
listen(oldsockfd,5);
clilen = sizeof(cli_addr);
sockfd = accept(oldsockfd, (struct sockaddr *) &cli_addr, &clilen);
if (sockfd < 0) error("ERROR on accept");
}
else if(argc == 3) { // We are client
sending = 1;
portno = atoi(argv[2]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) error("ERROR opening socket");
server = gethostbyname(argv[1]);
if(server == NULL) {
fprintf(stderr,"ERROR, no such host\n");
exit(0);
}
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)(server->h_addr), (char *)(&serv_addr.sin_addr.s_addr), server->h_length);
serv_addr.sin_port = htons(portno);
if (connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0) error("ERROR connecting");
}
else {
server = 0;
}
display = XOpenDisplay(display_name);
if (display == NULL) {
fprintf(stderr, "%s: cannot connect to X server '%s'\n", argv[0], display_name);
exit(1);
}
screen_num = DefaultScreen(display);
display_width = DisplayWidth(display, screen_num);
display_height = DisplayHeight(display, screen_num);
width = (display_width / 3);
height = (display_height / 3);
Atom wm_delete;
win = create_simple_window(display, &wm_delete, width, height, 0, 0);
XGCValues values;
values.graphics_exposures = 0;
gc = create_gc(display, win);
his_gc = create_gc(display, win);
refresh_gc = XCreateGC(display, win, GCGraphicsExposures, &values);
XSetForeground(display, refresh_gc, WhitePixel(display, screen_num));
XSetBackground(display, refresh_gc, WhitePixel(display, screen_num));
map = DefaultColormap(display, 0);
XParseColor(display, map, "#FFFFFF", &cols[0]);
XAllocColor(display, map, &cols[0]);
XParseColor(display, map, "#000000", &cols[1]);
XAllocColor(display, map, &cols[1]);
XParseColor(display, map, "#FF0000", &cols[2]);
XAllocColor(display, map, &cols[2]);
XParseColor(display, map, "#00FF00", &cols[3]);
XAllocColor(display, map, &cols[3]);
XParseColor(display, map, "#0000FF", &cols[4]);
XAllocColor(display, map, &cols[4]);
XParseColor(display, map, "#FFFF00", &cols[5]);
XAllocColor(display, map, &cols[5]);
XParseColor(display, map, "#FF00FF", &cols[6]);
XAllocColor(display, map, &cols[6]);
XParseColor(display, map, "#00FFFF", &cols[7]);
XAllocColor(display, map, &cols[7]);
XParseColor(display, map, "#999999", &cols[8]);
XAllocColor(display, map, &cols[8]);
XParseColor(display, map, "#666666", &cols[9]);
XAllocColor(display, map, &cols[9]);
set_title(display, win);
back_buffer = XCreatePixmap(display, win, MAX_WIDTH, MAX_HEIGHT, DefaultDepth(display, screen_num));
XFillRectangle(display, back_buffer, refresh_gc, 0, 0, MAX_WIDTH, MAX_HEIGHT);
if(sending) {
recv_info_t info;
info.display = display;
info.window = win;
info.gc = gc;
info.his_gc = his_gc;
info.refresh_gc = refresh_gc;
info.sockfd = sockfd;
pthread_create(&recv_thread, NULL, recv_line, &info);
}
XSelectInput(display, win, ExposureMask | KeyPressMask | ButtonPressMask | Button1MotionMask | StructureNotifyMask);
XEvent an_event;
while(1) {
XNextEvent(display, &an_event);
switch(an_event.type) {
case ClientMessage:
if(an_event.xclient.data.l[0] == wm_delete) quitme(display, gc, his_gc, refresh_gc, sockfd, 0);
break;
case Expose:
handle_expose(display, refresh_gc, (XExposeEvent*)&an_event.xexpose);
break;
case ConfigureNotify:
width = an_event.xconfigure.width;
height = an_event.xconfigure.height;
break;
case ButtonPress:
handle_button_down(display, gc, (XButtonEvent*)&an_event.xbutton, width, height);
break;
case MotionNotify:
handle_drag(display, gc, (XButtonEvent*)&an_event.xbutton, width, height, sockfd);
break;
case KeyPress:
handle_key(display, win, gc, his_gc, refresh_gc, map, (XKeyEvent*)&an_event.xkey, sockfd);
break;
default:
break;
}
}
quitme(display, gc, his_gc, refresh_gc, sockfd, 0);
}
int
main(int argc, char* argv[])
{
Display* display;
Window win;
char *display_name = getenv("DISPLAY");
GC gc, rev_gc;
Atom wmDelete;
struct CEventDescriptor event =
{
.Type = EVENT_NULL
};
InitGUIServer();
ClearScreen();
while (!ProcessGUIServer(&event))
;
display = XOpenDisplay(display_name);
if (display == NULL) {
fprintf(stderr, "%s: cannot connect to X server '%s'\n",
argv[0], display_name);
exit(1);
}
win = create_simple_window(display, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0);
wmDelete = XInternAtom(display, "WM_DELETE_WINDOW", True);
XSetWMProtocols(display, win, &wmDelete, 1);
gc = create_gc(display, win, 0);
rev_gc = create_gc(display, win, 1);
XSelectInput(display, win, ExposureMask | KeyPressMask |
ButtonPressMask | StructureNotifyMask);
{
int done = 0;
XEvent an_event;
while (!done) {
XNextEvent(display, &an_event);
switch (an_event.type) {
case Expose:
handle_expose(display, gc, rev_gc, (XExposeEvent*)&an_event.xexpose);
break;
case ButtonPress:
handle_button_down(display, gc, rev_gc,
(XButtonEvent*)&an_event.xbutton);
break;
case KeyPress:
done = handle_key_down(display, gc, rev_gc,
(XKeyEvent*)&an_event.xkey);
break;
case ClientMessage:
done = True;
break;
default:
break;
}
}
}
XFreeGC(display, gc);
XFreeGC(display, rev_gc);
XCloseDisplay(display);
return 0;
}