put absolute mouse stuff behind disabled feature flag

so it doesnt double up the relative movements, which seem good enough now

Author: techomancer

Cargo.toml

@@ -14,6 +14,9 @@ developer_ip7 = []  # CP0 Compare/timer calibration stats and debug prints
 lightning = []
 # Cranelift-based JIT compiler for MIPS → native translation.
 jit = ["cranelift-codegen", "cranelift-frontend", "cranelift-jit", "cranelift-module", "cranelift-native", "target-lexicon"]
+# Use WindowEvent::CursorMoved for mouse motion instead of DeviceEvent::MouseMotion.
+# Useful for testing absolute cursor position tracking. May cause doubled moves on some platforms.
+mouseabs = []
 
 [dependencies]
 clap = { version = "4", features = ["derive"] }

src/ui.rs

@@ -522,6 +522,7 @@ impl Ui {
                             mouse_delta.lock().accum = (0.0, 0.0);
                         }
                     }
+                    #[cfg(feature = "mouseabs")]
                     WindowEvent::CursorMoved { position, .. } => {
                         if mouse_grabbed {
                             let size = window.inner_size();