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-rw-r--r--src/plugins/platforms/windows/qwindowscontext.cpp10
1 files changed, 9 insertions, 1 deletions
diff --git a/src/plugins/platforms/windows/qwindowscontext.cpp b/src/plugins/platforms/windows/qwindowscontext.cpp
index 6462cb8d3e..a74a7efb41 100644
--- a/src/plugins/platforms/windows/qwindowscontext.cpp
+++ b/src/plugins/platforms/windows/qwindowscontext.cpp
@@ -412,9 +412,17 @@ QString QWindowsContext::registerWindowClass(const QWindow *w, bool isGL)
&& (type == Qt::Popup || w->property("_q_windowsDropShadow").toBool())) {
style |= CS_DROPSHADOW;
}
- if (type == Qt::Tool || type == Qt::ToolTip || type == Qt::Popup) {
+ switch (type) {
+ case Qt::Tool:
+ case Qt::ToolTip:
+ case Qt::Popup:
style |= CS_SAVEBITS; // Save/restore background
icon = false;
+ break;
+ case Qt::Dialog:
+ if (!(flags & Qt::WindowSystemMenuHint))
+ icon = false; // QTBUG-2027, dialogs without system menu.
+ break;
}
// Create a unique name for the flag combination
QString cname = QStringLiteral("Qt5QWindow");