diff -up qt-everywhere-opensource-src-4.8.5/src/gui/kernel/qapplication_x11.cpp.QTBUG-21900 qt-everywhere-opensource-src-4.8.5/src/gui/kernel/qapplication_x11.cpp
--- qt-everywhere-opensource-src-4.8.5/src/gui/kernel/qapplication_x11.cpp.QTBUG-21900 2013-05-30 16:18:05.000000000 -0500
+++ qt-everywhere-opensource-src-4.8.5/src/gui/kernel/qapplication_x11.cpp 2013-06-09 11:53:45.891771748 -0500
@@ -818,6 +818,27 @@ static Bool qt_sync_request_scanner(Disp
#endif
#endif // QT_NO_XSYNC
+struct qt_configure_event_data
+{
+ WId window;
+ WId parent;
+};
+
+static Bool qt_configure_event_scanner(Display*, XEvent *event, XPointer arg)
+{
+ qt_configure_event_data *data =
+ reinterpret_cast<qt_configure_event_data*>(arg);
+ if (event->type == ConfigureNotify &&
+ event->xconfigure.window == data->window) {
+ return true;
+ } else if (event->type == ReparentNotify &&
+ event->xreparent.window == data->window) {
+ data->parent = event->xreparent.parent;
+ }
+
+ return false;
+}
+
static void qt_x11_create_intern_atoms()
{
const char *names[QX11Data::NAtoms];
@@ -5302,8 +5323,11 @@ bool QETWidget::translateConfigEvent(con
if (d->extra->compress_events) {
// ConfigureNotify compression for faster opaque resizing
XEvent otherEvent;
- while (XCheckTypedWindowEvent(X11->display, internalWinId(), ConfigureNotify,
- &otherEvent)) {
+ qt_configure_event_data configureData;
+ configureData.window = internalWinId();
+ configureData.parent = d->topData()->parentWinId;
+ while (XCheckIfEvent(X11->display, &otherEvent,
+ &qt_configure_event_scanner, (XPointer)&configureData)) {
if (qt_x11EventFilter(&otherEvent))
continue;
@@ -5316,13 +5340,19 @@ bool QETWidget::translateConfigEvent(con
newSize.setWidth(otherEvent.xconfigure.width);
newSize.setHeight(otherEvent.xconfigure.height);
+ trust = isVisible()
+ && (configureData.parent == XNone ||
+ configureData.parent == QX11Info::appRootWindow());
+
if (otherEvent.xconfigure.send_event || trust) {
newCPos.rx() = otherEvent.xconfigure.x +
otherEvent.xconfigure.border_width;
newCPos.ry() = otherEvent.xconfigure.y +
otherEvent.xconfigure.border_width;
isCPos = true;
- }
+ } else {
+ isCPos = false;
+ }
}
#ifndef QT_NO_XSYNC
qt_sync_request_event_data sync_event;
@@ -5335,9 +5365,14 @@ bool QETWidget::translateConfigEvent(con
}
if (!isCPos) {
- // we didn't get an updated position of the toplevel.
- // either we haven't moved or there is a bug in the window manager.
- // anyway, let's query the position to be certain.
+ // If the last configure event didn't have a trustable position,
+ // it's necessary to query, see ICCCM 4.24:
+ //
+ // Any real ConfigureNotify event on a top-level window implies
+ // that the window’s position on the root may have changed, even
+ // though the event reports that the window’s position in its
+ // parent is unchanged because the window may have been reparented.
+
int x, y;
Window child;
XTranslateCoordinates(X11->display, internalWinId(),
