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Open the 3D mouse non-exclusively on macOS

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hidapi's macOS backend opens every device with
kIOHIDOptionsTypeSeizeDevice unless told otherwise (hid_init() calls
hid_darwin_set_open_exclusive(1) for backward compatibility). When
3DxWare is running it already holds the SpacePilot/SpaceMouse, so the
seize fails, hid_open_path() returns NULL and HidBackend::scan() keeps
retrying every 3 s without ever finding the device.

Reported in discussion #599: a SpacePilot Pro (046d:c629) is listed by
hid_enumerate() and works in 3DxWare, but has no effect in QET's macOS
build. Enumeration never opens a device, so it did not exercise this.

Guarded on HID_API_VERSION >= 0.12, where the setter first appeared.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
ispyisail
2026-09-25 20:27:37 +12:00
parent 8aefdcc481
commit 72cf86ece0
1 changed files with 8 additions and 0 deletions
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sources/spacemouse/hidbackend.cpp
+8
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@@ -20,6 +20,9 @@
#include <QTimer>
#include <hidapi.h>
#if defined(Q_OS_MACOS) && HID_API_VERSION >= HID_API_MAKE_VERSION(0, 12, 0)
# include <hidapi_darwin.h>
#endif
namespace {
constexpr int SCAN_INTERVAL_MS = 3000;
@@ -42,6 +45,11 @@ HidBackend::HidBackend(QObject *parent) :
return;
}
m_hid_initialised = true;
#if defined(Q_OS_MACOS) && HID_API_VERSION >= HID_API_MAKE_VERSION(0, 12, 0)
//hidapi opens devices exclusively on macOS by default, which fails
//while 3DxWare has the device open (discussion #599).
hid_darwin_set_open_exclusive(0);
#endif
m_read_timer = new QTimer(this);
connect(m_read_timer, &QTimer::timeout, this, &HidBackend::readReports);