diff options
Diffstat (limited to 'src/gui/kernel/qwidget.cpp')
| -rw-r--r-- | src/gui/kernel/qwidget.cpp | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp index 4cbf762..7c11c00 100644 --- a/src/gui/kernel/qwidget.cpp +++ b/src/gui/kernel/qwidget.cpp @@ -1502,6 +1502,8 @@ void QWidgetPrivate::setWinId(WId id) // set widget identifier mapper->remove(data.winid); } + const WId oldWinId = data.winid; + data.winid = id; #if defined(Q_WS_X11) hd = id; // X11: hd == ident @@ -1509,6 +1511,16 @@ void QWidgetPrivate::setWinId(WId id) // set widget identifier if (mapper && id && !userDesktopWidget) { mapper->insert(data.winid, q); } + + if(oldWinId != id) { + // Do not emit an event when the old winId is destroyed. This only + // happens (a) during widget destruction, and (b) immediately prior + // to creation of a new winId, for example as a result of re-parenting. + if(id != 0) { + QEvent e(QEvent::WinIdChange); + QCoreApplication::sendEvent(q, &e); + } + } } void QWidgetPrivate::createTLExtra() @@ -2227,8 +2239,8 @@ QWidget *QWidget::find(WId id) against. If Qt is using Carbon, the {WId} is actually an HIViewRef. If Qt is using Cocoa, {WId} is a pointer to an NSView. - \note We recommend that you do not store this value as it is likely to - change at run-time. + This value may change at run-time. An event with type QEvent::WinIdChange + will be sent to the widget following a change in window system identifier. \sa find() */ |