| X windows Sytem code not working [message #870018] |
Sat, 05 May 2012 18:04  |
 Nick Krause
Messages: 5
Registered: May 2012 |
Junior Member |
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#include<X11/Xlib.h>
#include<stdio.h>
#include<stdlib.h> // prevents error for exit on line 18 when compiling with gcc
void XOpenDisplay(Display *& d)
{
/* open connection with the server */
d=XOpenDisplay(NULL);
}
int main() {
Display *d;
int s;
Window w;
XEvent e;
/* open connection with the server */
XOpenDisplay(d);
if(d==NULL) {
printf("Cannot open display\n");
exit(1);
}
s=DefaultScreen(d);
/* create window */
w=XCreateSimpleWindow(d, RootWindow(d, s), 10, 10, 100, 100, 1,
BlackPixel(d, s), WhitePixel(d, s));
Atom delWindow = XInternAtom( d, "WM_DELETE_WINDOW", 0 );
XSetWMProtocols(d , w, &delWindow, 1);
/* select kind of events we are interested in */
XSelectInput(d, w, ExposureMask | KeyPressMask);
/* map (show) the window */
XMapWindow(d, w);
/* event loop */
while(1) {
XNextEvent(d, &e);
/* draw or redraw the window */
if(e.type==Expose) {
XFillRectangle(d, w, DefaultGC(d, s), 20, 20, 10, 10);
}
/* exit on key press */
if(e.type==KeyPress)
break;
// Handle Windows Close Event
if(e.type==ClientMessage)
break;
}
/* destroy our window */
XDestroyWindow(d, w);
/* close connection to server */
XCloseDisplay(d);
return 0;
}
Here is the code above it states that the functions have no references and is a bit of a pain. Can something please help me fix this as it would be greatly appreciated.
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