Grab device when dragging the window.

This gets rid of the problem where moving too fast would lose the contact
point of the window.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/PointerDevice.cpp b/src/PointerDevice.cpp
index 23c6de8..e8cfcc0 100644
--- a/src/PointerDevice.cpp
+++ b/src/PointerDevice.cpp
@@ -85,6 +85,9 @@ void PointerDevice::dragOff()
 
     XEventClass motion = evclasses[XI_MotionNotify];
     XSelectExtensionEvent(x11->dpy, x11->root, &motion, 1);
+    XUngrabDevice(x11->dpy, this->dev, CurrentTime);
+    TRACE("Ungrabbing device.\n");
+    XFlush(x11->dpy);
 
 }
 
@@ -115,6 +118,7 @@ bool PointerDevice::dragOn(WMWindow* win, int x, int y)
         // in case we get out of the window we still need to catch the release
         XEventClass classes[2] = {evclasses[XI_MotionNotify], evclasses[XI_ButtonRelease]};
         XSelectExtensionEvent(x11->dpy, x11->root, classes, 2);
+        XGrabDevice(x11->dpy, this->dev, win->getWindowBar(), False, 2, classes, GrabModeAsync, GrabModeAsync, CurrentTime);
         return true;
     }