add a translation utility to grail

By calling the grail_set_bbox(), grail will do translation of api
coordinates and matching properties to an external coordinate system,
such as screen coordinates.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 4 insertions, 0 deletions

diff --git a/test/grail-gesture.c b/test/grail-gesture.c
index c559661..762d3df 100644
--- a/test/grail-gesture.c
+++ b/test/grail-gesture.c
@@ -103,6 +103,10 @@ int main(int argc, char *argv[])
                 return -1;
         }
         grail_filter_abs_events(&ge, 1);
+
+        struct grail_coord min = { -2, -1 }, max = { 2, 1 };
+        grail_set_bbox(&ge, &min, &max);
+
         loop_device(&ge, fd);
         grail_close(&ge, fd);