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* X11Mouse.cs: Added SetPosition() implementation.

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Added detection of pointer warping and used it to fake relative
  motion.
This commit is contained in:
the_fiddler 2010-11-23 19:21:17 +00:00
parent 76e1d4064b
commit 6d00a1cce3
1 changed files with 51 additions and 11 deletions
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62
Source/OpenTK/Platform/X11/X11Mouse.cs
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@ -32,17 +32,31 @@ 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.
// Note 3: polling means we cannot ignore move events generated
// through SetPosition. In short, this won't work as expected (we
// simply cannot deliver relative movement through this driver).
sealed class X11Mouse : IMouseDriver2
{
readonly IntPtr display;
readonly IntPtr root_window;
MouseState mouse = new MouseState();
// Can either attach itself to the specified window or can hook the root window.
// 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;
display = API.DefaultDisplay;
root_window = Functions.XRootWindow(display, Functions.XDefaultScreen(display));
}
public MouseState GetState()
@ -63,7 +77,21 @@ namespace OpenTK.Platform.X11
public void SetPosition(double x, double y)
{
throw new NotImplementedException();
// 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 WriteBit(MouseButton offset, int enabled)
@ -82,22 +110,34 @@ namespace OpenTK.Platform.X11
using (new XLock(display))
{
IntPtr window = Functions.XRootWindow(display, Functions.XDefaultScreen(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);
mouse.X = root_x;
mouse.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;
}
WriteBit(MouseButton.Left, buttons & (int)MouseMask.Button1Mask);
WriteBit(MouseButton.Middle, buttons & (int)MouseMask.Button2Mask);
WriteBit(MouseButton.Right, buttons & (int)MouseMask.Button3Mask);
// Note: this will never work right. After spending a week on this, I simply don't care
// anymore. If someone can fix it, please do.
// 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).
if ((buttons & (int)MouseMask.Button4Mask) != 0)
mouse.WheelPrecise++;
if ((buttons & (int)MouseMask.Button5Mask) != 0)
mouse.WheelPrecise--;
//if ((buttons & (int)MouseMask.Button4Mask) != 0)
// mouse.WheelPrecise++;
//if ((buttons & (int)MouseMask.Button5Mask) != 0)
// mouse.WheelPrecise--;
WriteBit(MouseButton.Button1, buttons & (int)MouseMask.Button6Mask);
WriteBit(MouseButton.Button2, buttons & (int)MouseMask.Button7Mask);
WriteBit(MouseButton.Button3, buttons & (int)MouseMask.Button8Mask);