From 44bd4947d29e3b4cab77e77ae184c1bbc3bef0db Mon Sep 17 00:00:00 2001
From: Christopher Lais <chris+android@zenthought.org>
Date: Sat, 27 Nov 2010 13:36:23 -0600
Subject: [PATCH] minui: Add haptic feedback to virtual keys

Change-Id: Ibd9298513626092297bff83f4914b436c4ffbb3a
---
 minui/events.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/minui/events.c b/minui/events.c
index 1a9bdea..25a6023 100644
--- a/minui/events.c
+++ b/minui/events.c
@@ -29,6 +29,9 @@
 
 #define MAX_DEVICES 16
 
+#define VIBRATOR_TIMEOUT_FILE	"/sys/class/timed_output/vibrator/enable"
+#define VIBRATOR_TIME_MS	50
+
 enum {
     DOWN_NOT,
     DOWN_SENT,
@@ -65,6 +68,26 @@ static inline int ABS(int x) {
     return x<0?-x:x;
 }
 
+int vibrate(int timeout_ms)
+{
+    char str[20];
+    int fd;
+    int ret;
+
+    fd = open(VIBRATOR_TIMEOUT_FILE, O_WRONLY);
+    if (fd < 0)
+        return -1;
+
+    ret = snprintf(str, sizeof(str), "%d", timeout_ms);
+    ret = write(fd, str, ret);
+    close(fd);
+
+    if (ret < 0)
+       return -1;
+
+    return 0;
+}
+
 /* Returns empty tokens */
 static char *vk_strtok_r(char *str, const char *delim, char **save_str)
 {
@@ -300,6 +323,8 @@ static int vk_modify(struct ev *e, struct input_event *ev)
             ev->type = EV_KEY;
             ev->code = e->vks[i].scancode;
             ev->value = 1;
+
+            vibrate(VIBRATOR_TIME_MS);
             return 0;
         }
     }