public override bool Initialize(GameHost host)
{
base.Initialize(host);
Enabled.BindValueChanged(enabled =>
{
if (enabled)
{
host.Window.MouseMove += handleMouseEvent;
host.Window.MouseDown += handleMouseEvent;
host.Window.MouseUp += handleMouseEvent;
host.Window.MouseWheel += handleMouseEvent;
// polling is used to keep a valid mouse position when we aren't receiving events.
OpenTK.Input.MouseState?lastCursorState = null;
host.InputThread.Scheduler.Add(scheduled = new ScheduledDelegate(delegate
{
// we should be getting events if the mouse is inside the window.
if (MouseInWindow || !host.Window.Visible || host.Window.WindowState == WindowState.Minimized)
{
return;
}
var cursorState = OpenTK.Input.Mouse.GetCursorState();
if (cursorState.Equals(lastCursorState))
{
return;
}
lastCursorState = cursorState;
var mapped = host.Window.PointToClient(new Point(cursorState.X, cursorState.Y));
var newState = new OpenTKPollMouseState(cursorState, host.IsActive, new Vector2(mapped.X, mapped.Y));
HandleState(newState, lastPollState, true);
lastPollState = newState;
}, 0, 1000.0 / 60));
}
else
{
scheduled?.Cancel();
host.Window.MouseMove -= handleMouseEvent;
host.Window.MouseDown -= handleMouseEvent;
host.Window.MouseUp -= handleMouseEvent;
host.Window.MouseWheel -= handleMouseEvent;
lastPollState = null;
lastEventState = null;
}
}, true);
return(true);
}
private Vector2 getUpdatedPosition(OpenTK.Input.MouseState state, OpenTKMouseState lastState)
{
Vector2 currentPosition;
if ((state.Flags & MouseStateFlags.MoveAbsolute) > 0)
{
const int raw_input_resolution = 65536;
if (mapAbsoluteInputToWindow)
{
// map directly to local window
currentPosition.X = ((float)((state.X - raw_input_resolution / 2f) * sensitivity.Value) + raw_input_resolution / 2f) / raw_input_resolution * Host.Window.Width;
currentPosition.Y = ((float)((state.Y - raw_input_resolution / 2f) * sensitivity.Value) + raw_input_resolution / 2f) / raw_input_resolution
* Host.Window.Height;
}
else
{
Rectangle screenRect = (state.Flags & MouseStateFlags.VirtualDesktop) > 0
? Platform.Windows.Native.Input.GetVirtualScreenRect()
: new Rectangle(0, 0, DisplayDevice.Default.Width, DisplayDevice.Default.Height);
// map to full screen space
currentPosition.X = (float)state.X / raw_input_resolution * screenRect.Width + screenRect.X;
currentPosition.Y = (float)state.Y / raw_input_resolution * screenRect.Height + screenRect.Y;
// find local window coordinates
var clientPos = Host.Window.PointToClient(new Point((int)Math.Round(currentPosition.X), (int)Math.Round(currentPosition.Y)));
// apply sensitivity from window's centre
currentPosition.X = (float)((clientPos.X - Host.Window.Width / 2f) * sensitivity.Value + Host.Window.Width / 2f);
currentPosition.Y = (float)((clientPos.Y - Host.Window.Height / 2f) * sensitivity.Value + Host.Window.Height / 2f);
}
}
else
{
if (lastState == null)
{
// when we return from being outside of the window, we want to set the new position of our game cursor
// to where the OS cursor is, just once.
var cursorState = OpenTK.Input.Mouse.GetCursorState();
var screenPoint = Host.Window.PointToClient(new Point(cursorState.X, cursorState.Y));
currentPosition = new Vector2(screenPoint.X, screenPoint.Y);
}
else
{
currentPosition = lastState.Position + new Vector2(state.X - lastState.RawState.X, state.Y - lastState.RawState.Y) * (float)sensitivity.Value;
}
}
return(currentPosition);
}
private void handleMouseEvent(object sender, OpenTK.Input.MouseEventArgs e)
{
if (!MouseInWindow)
{
return;
}
if (e.Mouse.X < 0 || e.Mouse.Y < 0)
{
// todo: investigate further why we are getting negative values from OpenTK events
// on windows when crossing centre screen boundaries (width/2 or height/2).
return;
}
var newState = new OpenTKEventMouseState(e.Mouse, Host.IsActive, null);
HandleState(newState, lastEventState, true);
lastEventState = newState;
}
protected void HandleState(OpenTKMouseState state, OpenTKMouseState lastState, bool isAbsolutePosition)
{
if (lastState == null || isAbsolutePosition)
{
PendingInputs.Enqueue(new MousePositionAbsoluteInput {
Position = state.Position
});
currentPosition = state.Position;
}
else
{
var delta = state.Position - lastState.Position;
if (delta != Vector2.Zero)
{
PendingInputs.Enqueue(new MousePositionRelativeInput {
Delta = delta
});
currentPosition += delta;
}
}
if (lastState != null)
{
var scrollDelta = state.Scroll - lastState.Scroll;
if (scrollDelta != Vector2.Zero)
{
PendingInputs.Enqueue(new MouseScrollRelativeInput {
Delta = scrollDelta, IsPrecise = state.HasPreciseScroll
});
}
}
PendingInputs.Enqueue(new MouseButtonInput(state.Buttons, lastState?.Buttons));
FrameStatistics.Increment(StatisticsCounterType.MouseEvents);
}
public override bool Initialize(GameHost host)
{
base.Initialize(host);
// Get the bindables we need to determine whether to confine the mouse to window or not
if (host.Window is DesktopGameWindow desktopWindow)
{
confineMode.BindTo(desktopWindow.ConfineMouseMode);
windowMode.BindTo(desktopWindow.WindowMode);
mapAbsoluteInputToWindow.BindTo(desktopWindow.MapAbsoluteInputToWindow);
}
Enabled.ValueChanged += enabled =>
{
if (enabled)
{
host.InputThread.Scheduler.Add(scheduled = new ScheduledDelegate(delegate
{
if (!host.Window.Visible || host.Window.WindowState == WindowState.Minimized)
{
return;
}
if ((MouseInWindow || lastEachDeviceStates.Any(s => s != null && s.HasAnyButtonPressed)) && host.Window.Focused)
{
var newRawStates = new List <OpenTK.Input.MouseState>(mostSeenStates + 1);
for (int i = 0; i <= mostSeenStates + 1; i++)
{
var s = OpenTK.Input.Mouse.GetState(i);
if (s.IsConnected || i < mostSeenStates)
{
newRawStates.Add(s);
mostSeenStates = i;
}
}
while (lastEachDeviceStates.Count < newRawStates.Count)
{
lastEachDeviceStates.Add(null);
}
for (int i = 0; i < newRawStates.Count; i++)
{
if (newRawStates[i].IsConnected != true)
{
lastEachDeviceStates[i] = null;
continue;
}
var rawState = newRawStates[i];
var lastState = lastEachDeviceStates[i];
if (lastState != null && rawState.Equals(lastState.RawState))
{
continue;
}
var newState = new OpenTKPollMouseState(rawState, host.IsActive, getUpdatedPosition(rawState, lastState));
HandleState(newState, lastState, (rawState.Flags & MouseStateFlags.MoveAbsolute) > 0);
lastEachDeviceStates[i] = newState;
lastUnfocusedState = null;
}
}
else
{
var state = OpenTK.Input.Mouse.GetCursorState();
var screenPoint = host.Window.PointToClient(new Point(state.X, state.Y));
var newState = new UnfocusedMouseState(new OpenTK.Input.MouseState(), host.IsActive, new Vector2(screenPoint.X, screenPoint.Y));
HandleState(newState, lastUnfocusedState, true);
lastUnfocusedState = newState;
lastEachDeviceStates.Clear();
}
}, 0, 0));
}
else
{
scheduled?.Cancel();
lastEachDeviceStates.Clear();
lastUnfocusedState = null;
}
};
Enabled.TriggerChange();
return(true);
}
private Vector2 getUpdatedPosition(OpenTK.Input.MouseState state, OpenTKMouseState lastState)
{
Vector2 currentPosition;
if ((state.RawFlags & RawMouseFlags.MOUSE_MOVE_ABSOLUTE) > 0)
{
const int raw_input_resolution = 65536;
if (mapAbsoluteInputToWindow)
{
// map directly to local window
currentPosition.X = ((float)((state.X - raw_input_resolution / 2f) * sensitivity.Value) + raw_input_resolution / 2f) / raw_input_resolution * host.Window.Width;
currentPosition.Y = ((float)((state.Y - raw_input_resolution / 2f) * sensitivity.Value) + raw_input_resolution / 2f) / raw_input_resolution
* host.Window.Height;
}
else
{
Rectangle screenRect = (state.RawFlags & RawMouseFlags.MOUSE_VIRTUAL_DESKTOP) > 0
? Platform.Windows.Native.Input.GetVirtualScreenRect()
: new Rectangle(0, 0, DisplayDevice.Default.Width, DisplayDevice.Default.Height);
// map to full screen space
currentPosition.X = (float)state.X / raw_input_resolution * screenRect.Width + screenRect.X;
currentPosition.Y = (float)state.Y / raw_input_resolution * screenRect.Height + screenRect.Y;
// find local window coordinates
var clientPos = host.Window.PointToClient(new Point((int)Math.Round(currentPosition.X), (int)Math.Round(currentPosition.Y)));
// apply sensitivity from window's centre
currentPosition.X = (float)((clientPos.X - host.Window.Width / 2f) * sensitivity.Value + host.Window.Width / 2f);
currentPosition.Y = (float)((clientPos.Y - host.Window.Height / 2f) * sensitivity.Value + host.Window.Height / 2f);
}
}
else
{
if (lastState == null)
{
// when we return from being outside of the window, we want to set the new position of our game cursor
// to where the OS cursor is, just once.
var cursorState = OpenTK.Input.Mouse.GetCursorState();
var screenPoint = host.Window.PointToClient(new Point(cursorState.X, cursorState.Y));
currentPosition = new Vector2(screenPoint.X, screenPoint.Y);
}
else
{
currentPosition = lastState.Position + new Vector2(state.X - lastState.RawState.X, state.Y - lastState.RawState.Y) * (float)sensitivity.Value;
// When confining, clamp to the window size.
if (confineMode.Value == ConfineMouseMode.Always || confineMode.Value == ConfineMouseMode.Fullscreen && windowMode.Value == WindowMode.Fullscreen)
{
currentPosition = Vector2.Clamp(currentPosition, Vector2.Zero, new Vector2(host.Window.Width, host.Window.Height));
}
// update the windows cursor to match our raw cursor position.
// this is important when sensitivity is decreased below 1.0, where we need to ensure the cursor stays within the window.
var screenPoint = host.Window.PointToScreen(new Point((int)currentPosition.X, (int)currentPosition.Y));
OpenTK.Input.Mouse.SetPosition(screenPoint.X, screenPoint.Y);
}
}
return(currentPosition);
}
