From 441031dadc4f5e8c1487468229781702bc08fb14 Mon Sep 17 00:00:00 2001 From: Dima Zavin Date: Wed, 12 Oct 2011 15:53:29 -0700 Subject: minui: add ability to synchronize current key state If a key is down prior to the time of initialization, we would not get the down event for the key, and thus think that the key is not pressed. Add an interface that allows one to provide a callback to execute on all keys that are currently down. Change-Id: I2a4096c0cb4c7c7a9a80d207835f168a0b418413 Signed-off-by: Dima Zavin --- minui/events.c | 38 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 36 insertions(+), 2 deletions(-) (limited to 'minui/events.c') diff --git a/minui/events.c b/minui/events.c index c533a482a..2918afaa8 100644 --- a/minui/events.c +++ b/minui/events.c @@ -27,7 +27,11 @@ #define MAX_DEVICES 16 #define MAX_MISC_FDS 16 -#define test_bit(bit, array) ((array)[(bit)/8] & (1<<((bit)%8))) +#define BITS_PER_LONG (sizeof(unsigned long) * 8) +#define BITS_TO_LONGS(x) (((x) + BITS_PER_LONG - 1) / BITS_PER_LONG) + +#define test_bit(bit, array) \ + ((array)[(bit)/BITS_PER_LONG] & (1 << ((bit) % BITS_PER_LONG))) struct fd_info { ev_callback cb; @@ -50,7 +54,7 @@ int ev_init(ev_callback input_cb, void *data) dir = opendir("/dev/input"); if(dir != 0) { while((de = readdir(dir))) { - uint8_t ev_bits[(EV_MAX + 1) / 8]; + unsigned long ev_bits[BITS_TO_LONGS(EV_MAX)]; // fprintf(stderr,"/dev/input/%s\n", de->d_name); if(strncmp(de->d_name,"event",5)) continue; @@ -139,3 +143,33 @@ int ev_get_input(int fd, short revents, struct input_event *ev) } return -1; } + +int ev_sync_key_state(ev_set_key_callback set_key_cb, void *data) +{ + unsigned long key_bits[BITS_TO_LONGS(KEY_MAX)]; + unsigned long ev_bits[BITS_TO_LONGS(EV_MAX)]; + unsigned i; + int ret; + + for (i = 0; i < ev_dev_count; i++) { + int code; + + memset(key_bits, 0, sizeof(key_bits)); + memset(ev_bits, 0, sizeof(ev_bits)); + + ret = ioctl(ev_fds[i].fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits); + if (ret < 0 || !test_bit(EV_KEY, ev_bits)) + continue; + + ret = ioctl(ev_fds[i].fd, EVIOCGKEY(sizeof(key_bits)), key_bits); + if (ret < 0) + continue; + + for (code = 0; code <= KEY_MAX; code++) { + if (test_bit(code, key_bits)) + set_key_cb(code, 1, data); + } + } + + return 0; +} -- cgit v1.2.3