/// <summary>
/// Function to unhook raw input from the application.
/// </summary>
private void UnhookRawInput()
{
foreach (HIDUsage type in _devices.Values.Select(item => item.DeviceUsage).Distinct())
{
RawInputApi.UnregisterRawInputDevice(type);
}
}
/// <summary>
/// Function to unregister the device from the raw input provider.
/// </summary>
/// <param name="device">The device to unregister from the raw input provider.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="device"/> parameter is <b>null</b>.</exception>
/// <remarks>
/// This will unregister a previously registered <see cref="IGorgonRawInputDevice"/>. When the last device of a specific type (e.g. a mouse, keyboard, etc...) is unregistered, then the
/// Raw Input messages for that device type will also be unregistered and the application will no longer receive messages from that type of device.
/// </remarks>
public void UnregisterDevice(IGorgonRawInputDevice device)
{
if (device == null)
{
throw new ArgumentNullException(nameof(device));
}
lock (_syncLock)
{
var key = new DeviceKey
{
DeviceType = device.DeviceType,
DeviceHandle = device.Handle
};
switch (device.DeviceType)
{
case RawInputType.Keyboard:
_keyboardDevices.Remove(key);
break;
case RawInputType.Mouse:
_mouseDevices.Remove(key);
break;
case RawInputType.HID:
_hids.Remove(key);
break;
default:
throw new ArgumentException(string.Format(Resources.GORINP_RAW_ERR_UNKNOWN_DEVICE_TYPE, device.DeviceType), nameof(device));
}
if (!_devices.ContainsKey(key))
{
return;
}
_devices.Remove(key);
// If all devices of this type have been unregistered, unregister with raw input as well.
if ((_devices.Count(item => item.Value.DeviceType == device.DeviceType) == 0) &&
(RawInputApi.GetDeviceRegistration(device.DeviceUsage) != null))
{
RawInputApi.UnregisterRawInputDevice(device.DeviceUsage);
}
// If we have no more registered devices, then uninstall the filter.
if (_devices.Count != 0)
{
return;
}
_filter?.Dispose();
_filter = null;
}
}