added simple example program

git-svn-id: svn+ssh://svn.code.sf.net/p/spacenav/code/libspnav@7 ef983eb1-d774-4af8-acfd-baaf7b16a646

Author: jtsiomb

examples/Makefile

@@ -0,0 +1,10 @@
+CC = gcc
+CFLAGS = -pedantic -Wall -g -I..
+LDFLAGS = -L.. -lspnav -lX11
+
+simple: simple.o
+	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+
+.PHONY: clean
+clean:
+	rm -f simple simple.o

examples/simple.c

@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <X11/Xlib.h>
+#include <spnav.h>
+
+void sig(int s)
+{
+	spnav_close();
+	exit(0);
+}
+
+int main(void)
+{
+	Display *dpy;
+	Window win;
+	unsigned long bpix;
+	spnav_event sev;
+
+	signal(SIGINT, sig);
+
+	if(!(dpy = XOpenDisplay(0))) {
+		fprintf(stderr, "failed to connect to the X server\n");
+		return 1;
+	}
+
+	bpix = BlackPixel(dpy, DefaultScreen(dpy));
+	win = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 1, 1, 0, bpix, bpix);
+
+	/* This actually registers our window with the driver for receiving
+	 * motion/button events through the 3dxsrv-compatible X11 protocol.
+	 */
+	if(spnav_x11_open(dpy, win) == -1) {
+		fprintf(stderr, "failed to connect to the space navigator daemon\n");
+		return 1;
+	}
+
+	/* spnav_wait_event() and spnav_poll_event(), will silently ignore any non-spnav X11 events.
+	 *
+	 * If you need to handle other X11 events you will have to use a regular XNextEvent() loop,
+	 * and pass any ClientMessage events to spnav_x11_event, which will return the event type or
+	 * zero if it's not an spnav event (see spnav.h).
+	 */
+	while(spnav_wait_event(&sev)) {
+		if(sev.type == SPNAV_EVENT_MOTION) {
+			printf("got motion event: t(%d, %d, %d) ", sev.motion.x, sev.motion.y, sev.motion.z);
+			printf("r(%d, %d, %d)\n", sev.motion.rx, sev.motion.ry, sev.motion.rz);
+		} else {	/* SPNAV_EVENT_BUTTON */
+			printf("got button %s event b(%d)\n", sev.button.press ? "press" : "release", sev.button.bnum);
+		}
+	}
+
+	spnav_close();
+	return 0;
+}