1 files changed, 59 insertions, 0 deletions
diff --git a/xlibtest.c b/xlibtest.c
new file mode 100644
index 0000000..adcbd26
--- /dev/null
+++ b/xlibtest.c
@@ -0,0 +1,59 @@
+/*
+ * Simple Xlib application drawing a box in a window.
+ * gcc input.c -o output -lX11
+ */
+
+#include <X11/Xlib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char **argv)
+{
+    Display *display;
+    Window window;
+    XEvent event;
+    char *msg = "Hello, World!";
+    int s;
+
+    /* open connection with the server */
+    display = XOpenDisplay(NULL);
+    if (display == NULL)
+    {
+        fprintf(stderr, "Cannot open display\n");
+        exit(1);
+    }
+
+    s = DefaultScreen(display);
+
+    /* create window */
+    window = XCreateSimpleWindow(display, RootWindow(display, s), 10, 10, 200, 200, 1,
+            BlackPixel(display, s), WhitePixel(display, s));
+
+    /* select kind of events we are interested in */
+    XSelectInput(display, window, ExposureMask | KeyPressMask);
+
+    /* map (show) the window */
+    XMapWindow(display, window);
+
+    /* event loop */
+    for (;;)
+    {
+        XNextEvent(display, &event);
+
+        /* draw or redraw the window */
+        if (event.type == Expose)
+        {
+            XFillRectangle(display, window, DefaultGC(display, s), 20, 20, 10, 10);
+            XDrawString(display, window, DefaultGC(display, s), 50, 50, msg, strlen(msg));
+        }
+        /* exit on key press */
+        if (event.type == KeyPress)
+            break;
+    }
+
+    /* close connection to server */
+    XCloseDisplay(display);
+
+    return 0;
+}