Feature version flag

Cargo.toml

@@ -20,6 +20,10 @@ keywords = [
     "hand",
 ]
 
+[features]
+default = ["gemini"]
+gemini = []
+
 [dependencies]
 leap-sys = "0.2"
 num_enum = "0.5"

README.md

@@ -53,6 +53,17 @@ The Ultraleap backend is only compatible with Windows, and so is LeapRS. Older
 versions of the software were multi-platform, so it could be possible to create
 a more compatible library, but it is not in the scope at the moment.
 
+### Using with previous SDK versions
+
+Disabling the `geminy` feature enables building application for the previous SDK
+generation (Orion). In Cargo.toml:
+
+```toml
+[dependencies = { version = "*", default-features = false }]
+```
+
+You also need to point the `LEAPSDK_LIB_PATH` to a SDK with the Orion version.
+
 ## Runtime
 
 At runtime, the application requires the LeapC.dll file to be available. The

src/event.rs

@@ -3,7 +3,6 @@ use leap_sys::*;
 use crate::{
     ConfigChangeEvent, ConfigResponseEvent, ConnectionEvent, ConnectionLostEvent, DeviceEvent,
     DeviceStatusChangeEvent, ImageEvent, LogEvent, LogEvents, PolicyEvent, TrackingEvent,
-    TrackingModeEvent,
 };
 
 #[doc = " The types of event messages resulting from calling LeapPollConnection()."]
@@ -87,7 +86,8 @@ pub enum Event<'a> {
     #[doc = " This can be due to changing the hmd or screentop policy with LeapSetPolicyFlags()."]
     #[doc = " or setting the tracking mode using LeapSetTrackingMode()."]
     #[doc = " @since 5.0.0"]
-    TrackingMode(TrackingModeEvent<'a>),
+    #[cfg(feature = "gemini")]
+    TrackingMode(crate::TrackingModeEvent<'a>),
     #[doc = " An array of system messages. @since 4.0.0"]
     LogEvents(LogEvents<'a>),
     #[doc = " A head pose. The message contains the timestamped head position and orientation."]

src/events/mod.rs

@@ -10,6 +10,7 @@ mod log_event;
 mod log_events;
 mod policy_event;
 mod tracking_event;
+#[cfg(feature = "gemini")]
 mod tracking_mode_event;
 pub use config_change_event::*;
 pub use config_response_event::*;
@@ -23,4 +24,5 @@ pub use log_event::*;
 pub use log_events::*;
 pub use policy_event::*;
 pub use tracking_event::*;
+#[cfg(feature = "gemini")]
 pub use tracking_mode_event::*;

src/lib.rs

@@ -30,8 +30,10 @@ mod policy_flag;
 mod quaternion;
 mod service_state;
 mod sized_with_trailing_data;
+#[cfg(feature = "gemini")]
 mod tracking_mode;
 mod variant;
+#[cfg(feature = "gemini")]
 mod version;
 mod version_part;
 pub use crate::image::*;
@@ -63,8 +65,10 @@ pub use palm::*;
 pub use policy_flag::*;
 pub use quaternion::*;
 pub use service_state::*;
+#[cfg(feature = "gemini")]
 pub use tracking_mode::*;
 pub use variant::*;
+#[cfg(feature = "gemini")]
 pub use version::*;
 pub use version_part::*;