xcb: Use functors in QXcbConnection::checkEvent()

... to check for buffered events. This makes the code less verbose and
easier to read. Changed the filter signature to pass an event type in addition
to the actual event, for the convenience of API user. And do not pass worthless
nullptr-s to the filter.

The only reason why KeyChecker from qxcbkeyboard.cpp was not converted
to lambda expression is that the code looks suspicious - KeyChecker::m_release
default value is 'true' and I don't see where it would ever be assigned
'false' (ref. QTBUG-69679) and the code is known to be buggy (ref. QTBUG-57335).
Those issues are out-of-scope for this patch.

Change-Id: If2fdd60fbb93eb983f3c9ad616aaf04834fede9f
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Mikhail Svetkin <mikhail.svetkin@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/plugins/platforms/xcb/qxcbclipboard.h b/src/plugins/platforms/xcb/qxcbclipboard.h
index bfeae13e10..8d0df39ac8 100644
--- a/src/plugins/platforms/xcb/qxcbclipboard.h
+++ b/src/plugins/platforms/xcb/qxcbclipboard.h
@@ -89,7 +89,7 @@ public:
     QByteArray getSelection(xcb_atom_t selection, xcb_atom_t target, xcb_atom_t property, xcb_timestamp_t t = 0);
 
 private:
-    xcb_generic_event_t *waitForClipboardEvent(xcb_window_t win, int type, int timeout, bool checkManager = false);
+    xcb_generic_event_t *waitForClipboardEvent(xcb_window_t window, int type, int timeout, bool checkManager = false);
 
     xcb_atom_t sendTargetsSelection(QMimeData *d, xcb_window_t window, xcb_atom_t property);
     xcb_atom_t sendSelection(QMimeData *d, xcb_atom_t target, xcb_window_t window, xcb_atom_t property);