Opentk/Source/OpenTK/Platform/X11/XI2Mouse.cs
the_fiddler 4d2759eb78 * XI2Mouse.cs:
* X11Factory.cs: Detect whether XInput2 is not supported without
  throwing an exception.
2010-10-22 07:41:56 +00:00

222 lines
9.7 KiB
C#

#region License
//
// The Open Toolkit Library License
//
// Copyright (c) 2006 - 2010 the Open Toolkit library.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do
// so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
#endregion
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.InteropServices;
using OpenTK.Input;
namespace OpenTK.Platform.X11
{
// Todo: multi-mouse support. Right now we aggregate all data into a single mouse device.
// This should be easy: just read the device id and route the data to the correct device.
sealed class XI2Mouse : IMouseDriver
{
List<MouseState> mice = new List<MouseState>();
Dictionary<int, int> rawids = new Dictionary<int, int>(); // maps raw ids to mouse ids
int first_mouse;
readonly X11WindowInfo window;
static int XIOpCode;
static readonly Functions.EventPredicate PredicateImpl = IsEventValid;
readonly IntPtr Predicate = Marshal.GetFunctionPointerForDelegate(PredicateImpl);
// Can either attach itself to the specified window or can hook the root window.
public XI2Mouse(X11WindowInfo win)
{
if (win != null)
{
window = win;
}
else
{
using (new XLock(API.DefaultDisplay))
{
window = new X11WindowInfo();
window.Display = API.DefaultDisplay;
window.Screen = Functions.XDefaultScreen(window.Display);
window.RootWindow = Functions.XRootWindow(window.Display, window.Screen);
window.WindowHandle = window.RootWindow;
}
}
if (!IsSupported(window.Display))
throw new NotSupportedException("XInput2 not supported.");
using (XIEventMask mask = new XIEventMask(1, XIEventMasks.RawButtonPressMask |
XIEventMasks.RawButtonReleaseMask | XIEventMasks.RawMotionMask))
{
Functions.XISelectEvents(window.Display, window.WindowHandle, mask);
}
Debug.WriteLine("Using XI2Mouse.");
}
// Checks whether XInput2 is supported on the specified display.
// If a display is not specified, the default display is used.
internal static bool IsSupported(IntPtr display)
{
if (display == IntPtr.Zero)
display = API.DefaultDisplay;
using (new XLock(display))
{
int major, ev, error;
if (Functions.XQueryExtension(display, "XInputExtension", out major, out ev, out error) == 0)
{
return false;
}
XIOpCode = major;
}
return true;
}
#region IMouseDriver Members
// Todo: remove this
public IList<MouseDevice> Mouse { get { throw new NotSupportedException(); } }
public MouseState GetState()
{
ProcessEvents();
if (mice.Count > 0)
return mice[0];
else
return new MouseState();
}
public MouseState GetState(int index)
{
ProcessEvents();
if (mice.Count > index)
return mice[index];
else
return new MouseState();
}
#endregion
void ProcessEvents()
{
while (true)
{
XEvent e = new XEvent();
XGenericEventCookie cookie;
using (new XLock(window.Display))
{
if (!Functions.XCheckIfEvent(window.Display, ref e, Predicate, new IntPtr(XIOpCode)))
return;
cookie = e.GenericEventCookie;
if (Functions.XGetEventData(window.Display, ref cookie) != 0)
{
XIRawEvent raw = (XIRawEvent)
Marshal.PtrToStructure(cookie.data, typeof(XIRawEvent));
if (!rawids.ContainsKey(raw.deviceid))
{
mice.Add(new MouseState());
rawids.Add(raw.deviceid, mice.Count - 1);
}
MouseState state = mice[rawids[raw.deviceid]];
switch (raw.evtype)
{
case XIEventType.RawMotion:
if (IsBitSet(raw.valuators.mask, 0))
state.X += (int)BitConverter.Int64BitsToDouble(Marshal.ReadInt64(raw.raw_values, 0));
if (IsBitSet(raw.valuators.mask, 1))
state.Y += (int)BitConverter.Int64BitsToDouble(Marshal.ReadInt64(raw.raw_values, 8));
break;
case XIEventType.RawButtonPress:
switch (raw.detail)
{
case 1: state.EnableBit((int)MouseButton.Left); break;
case 2: state.EnableBit((int)MouseButton.Middle); break;
case 3: state.EnableBit((int)MouseButton.Right); break;
case 4: state.WheelPrecise++; break;
case 5: state.WheelPrecise--; break;
case 6: state.EnableBit((int)MouseButton.Button1); break;
case 7: state.EnableBit((int)MouseButton.Button2); break;
case 8: state.EnableBit((int)MouseButton.Button3); break;
case 9: state.EnableBit((int)MouseButton.Button4); break;
case 10: state.EnableBit((int)MouseButton.Button5); break;
case 11: state.EnableBit((int)MouseButton.Button6); break;
case 12: state.EnableBit((int)MouseButton.Button7); break;
case 13: state.EnableBit((int)MouseButton.Button8); break;
case 14: state.EnableBit((int)MouseButton.Button9); break;
}
break;
case XIEventType.RawButtonRelease:
switch (raw.detail)
{
case 1: state.DisableBit((int)MouseButton.Left); break;
case 2: state.DisableBit((int)MouseButton.Middle); break;
case 3: state.DisableBit((int)MouseButton.Right); break;
case 6: state.DisableBit((int)MouseButton.Button1); break;
case 7: state.DisableBit((int)MouseButton.Button2); break;
case 8: state.DisableBit((int)MouseButton.Button3); break;
case 9: state.DisableBit((int)MouseButton.Button4); break;
case 10: state.DisableBit((int)MouseButton.Button5); break;
case 11: state.DisableBit((int)MouseButton.Button6); break;
case 12: state.DisableBit((int)MouseButton.Button7); break;
case 13: state.DisableBit((int)MouseButton.Button8); break;
case 14: state.DisableBit((int)MouseButton.Button9); break;
}
break;
}
mice[rawids[raw.deviceid]] = state;
}
Functions.XFreeEventData(window.Display, ref cookie);
}
}
}
static bool IsEventValid(IntPtr display, ref XEvent e, IntPtr arg)
{
return e.GenericEventCookie.extension == arg.ToInt32() &&
(e.GenericEventCookie.evtype == (int)XIEventType.RawMotion ||
e.GenericEventCookie.evtype == (int)XIEventType.RawButtonPress ||
e.GenericEventCookie.evtype == (int)XIEventType.RawButtonRelease);
}
static bool IsBitSet(IntPtr mask, int bit)
{
unsafe
{
return (*((byte*)mask + (bit >> 3)) & (1 << (bit & 7))) != 0;
}
}
}
}