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Windows: Force toplevel flag in setParent() in both cases.

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When re-applying window flags in setParent, force top level on
or off according to state.

Task-number: QTBUG-28872
Change-Id: If931fcb38394f472a6cdf260aa935c1d03779611
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
This commit is contained in:
Friedemann Kleint 2013-01-14 15:42:33 +01:00 committed by The Qt Project
parent 71a7ad80c0
commit cd7ba89a07
1 changed files with 11 additions and 6 deletions
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17
src/plugins/platforms/windows/qwindowswindow.cpp
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@ -267,7 +267,7 @@ static void setWindowOpacity(HWND hwnd, Qt::WindowFlags flags, qreal level)
struct WindowCreationData
{
typedef QWindowsWindow::WindowData WindowData;
enum Flags { ForceChild = 0x1 };
enum Flags { ForceChild = 0x1, ForceTopLevel = 0x2 };
WindowCreationData() : parentHandle(0), type(Qt::Widget), style(0), exStyle(0),
topLevel(false), popup(false), dialog(false), desktop(false),
@ -319,7 +319,13 @@ void WindowCreationData::fromWindow(const QWindow *w, const Qt::WindowFlags flag
parentHandle = (HWND)prop.value<WId>();
}
topLevel = ((creationFlags & ForceChild) || embedded) ? false : w->isTopLevel();
if (creationFlags & ForceChild) {
topLevel = false;
} else if (creationFlags & ForceTopLevel) {
topLevel = true;
} else {
topLevel = w->isTopLevel();
}
if (topLevel && flags == 1) {
flags |= Qt::WindowTitleHint|Qt::WindowSystemMenuHint|Qt::WindowMinimizeButtonHint
@ -984,10 +990,9 @@ void QWindowsWindow::setParent_sys(const QPlatformWindow *parent) const
// WS_CHILD/WS_POPUP must be manually set/cleared in addition
// to dialog frames, etc (see SetParent() ) if the top level state changes.
if (wasTopLevel != isTopLevel) {
const unsigned flags = isTopLevel ? unsigned(0) : unsigned(WindowCreationData::ForceChild);
setWindowFlags_sys(window()->flags(), flags);
}
// Force toplevel state as QWindow::isTopLevel cannot be relied upon here.
if (wasTopLevel != isTopLevel)
setWindowFlags_sys(window()->flags(), unsigned(isTopLevel ? WindowCreationData::ForceTopLevel : WindowCreationData::ForceChild));
}
}