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#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 OpenTK.Input;
namespace OpenTK.Platform.X11
{
// Note: we cannot create a background window to retrieve events,
// because X11 doesn't deliver core pointer events to background
// windows (unless we grab, which will break *everything*).
// The only solution is to poll.
// Note 2: this driver only supports absolute positions. Relative motion
// is faked through SetPosition. This is called automatically when
// NativeWindow.CursorVisible = false, otherwise it must be called
// by the user.
// Note 3: this driver cannot drive the mouse wheel reliably.
// See comments in ProcessEvents() for more information.
// (If someone knows of a solution, please tell!)
sealed class X11Mouse : IMouseDriver2
{
readonly IntPtr display;
readonly IntPtr root_window;
MouseState mouse = new MouseState();
MouseState cursor = new MouseState();
// When the mouse warps, "detach" the current location
// from the pointer.
bool mouse_detached;
int mouse_detached_x, mouse_detached_y;
public X11Mouse()
{
Debug.WriteLine("Using X11Mouse.");
mouse.IsConnected = true;
cursor.IsConnected = true;
display = API.DefaultDisplay;
root_window = Functions.XRootWindow(display, Functions.XDefaultScreen(display));
}
public MouseState GetState()
{
ProcessEvents();
return mouse;
}
public MouseState GetState(int index)
{
ProcessEvents();
// X11Mouse supports only one device
if (index == 0)
return mouse;
else
return new MouseState();
}
public MouseState GetCursorState()
{
ProcessEvents();
return cursor;
}
public void SetPosition(double x, double y)
{
// Update the current location, otherwise the pointer
// may become locked (for instance, if we call
// SetPosition too often, like X11GLNative does).
ProcessEvents();
using (new XLock(display))
{
// Mark the expected warp-event so it can be ignored.
mouse_detached = true;
mouse_detached_x = (int)x;
mouse_detached_y = (int)y;
Functions.XWarpPointer(display,
IntPtr.Zero, root_window, 0, 0, 0, 0, (int)x, (int)y);
}
}
void ProcessEvents()
{
IntPtr root, child;
int root_x, root_y, win_x, win_y;
int buttons;
using (new XLock(display))
{
IntPtr window = root_window;
Functions.XQueryPointer(display, window, out root, out child,
out root_x, out root_y, out win_x, out win_y, out buttons);
cursor.X = root_x;
cursor.Y = root_y;
if (!mouse_detached)
{
mouse.X = root_x;
mouse.Y = root_y;
}
else
{
mouse.X += (int)root_x - mouse_detached_x;
mouse.Y += (int)root_y - mouse_detached_y;
mouse_detached_x = root_x;
mouse_detached_y = root_y;
}
cursor[MouseButton.Left] = mouse[MouseButton.Left] = (buttons & (int)MouseMask.Button1Mask) != 0;
cursor[MouseButton.Middle] = mouse[MouseButton.Middle] = (buttons & (int)MouseMask.Button2Mask) != 0;
cursor[MouseButton.Right] = mouse[MouseButton.Right] = (buttons & (int)MouseMask.Button3Mask) != 0;
// Note: this will never work right, wheel events have a duration of 0
// (yes, zero). They are impposible to catch via polling.
// After spending a week on this, I simply don't care anymore.
// If someone can fix it, please do.
// Note 2: I have tried passively grabbing those buttons - no go (BadAccess).
// Maybe I am doing something wrong with the grab.
//if ((buttons & (int)MouseMask.Button4Mask) != 0)
// mouse.WheelPrecise++;
//if ((buttons & (int)MouseMask.Button5Mask) != 0)
// mouse.WheelPrecise--;
cursor[MouseButton.Button1] = mouse[MouseButton.Button1] = (buttons & (int)MouseMask.Button6Mask) != 0;
cursor[MouseButton.Button2] = mouse[MouseButton.Button2] = (buttons & (int)MouseMask.Button7Mask) != 0;
cursor[MouseButton.Button3] = mouse[MouseButton.Button3] = (buttons & (int)MouseMask.Button8Mask) != 0;
}
}
}
}
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