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Better way of checking the events queue in updateXTime().

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svn path=/trunk/kdebase/kwin/; revision=314133
This commit is contained in:
Luboš Luňák 2004-05-24 13:15:30 +00:00
parent a8fac1a9db
commit 31f2adf0a2
1 changed files with 19 additions and 21 deletions
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40
utils.cpp
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@ -249,36 +249,34 @@ static Bool update_x_time_predicate( Display*, XEvent* event, XPointer )
return False;
}
static Time nextXTime()
{
next_x_time = CurrentTime;
XEvent dummy;
XCheckIfEvent( qt_xdisplay(), &dummy, update_x_time_predicate, NULL );
return next_x_time;
}
/*
Updates qt_x_time. This used to simply fetch current timestamp from the server,
but that can cause qt_x_time to be newer than timestamp of events that are
still in our events queue, thus e.g. making XSetInputFocus() caused by such
event to be ignored. Therefore first events queue is searched for first
event with timestamp.
event to be ignored. Therefore events queue is searched for first
event with timestamp, and extra PropertyNotify is generated in order to make
sure such event is found.
*/
void updateXTime()
{
qt_x_time = nextXTime();
if( qt_x_time == CurrentTime )
static QWidget* w = 0;
if ( !w )
w = new QWidget;
long data = 1;
XChangeProperty(qt_xdisplay(), w->winId(), atoms->kwin_running, atoms->kwin_running, 32,
PropModeAppend, (unsigned char*) &data, 1);
next_x_time = CurrentTime;
XEvent dummy;
XCheckIfEvent( qt_xdisplay(), &dummy, update_x_time_predicate, NULL );
if( next_x_time == CurrentTime )
{
static QWidget* w = 0;
if ( !w )
w = new QWidget;
long data = 1;
XChangeProperty(qt_xdisplay(), w->winId(), atoms->kwin_running, atoms->kwin_running, 32,
PropModeAppend, (unsigned char*) &data, 1);
XEvent ev;
XWindowEvent( qt_xdisplay(), w->winId(), PropertyChangeMask, &ev );
qt_x_time = ev.xproperty.time;
XSync( qt_xdisplay(), False );
XCheckIfEvent( qt_xdisplay(), &dummy, update_x_time_predicate, NULL );
}
assert( next_x_time != CurrentTime );
qt_x_time = next_x_time;
XEvent ev; // remove the PropertyNotify event from the events queue
XWindowEvent( qt_xdisplay(), w->winId(), PropertyChangeMask, &ev );
}
static int server_grab_count = 0;