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