Bring back native dialogs for Windows XP.

The  CLSID_FileOpenDialog, CLSID_FileSaveDialog-based dialogs
are available from Windows Vista on only, the old Shell-function
based ones are required for Windows XP.

Add a command line argument to switch dialog types.

Extract some common functionality for both dialog types.

Task-number: QTBUG-27621

Change-Id: I224c5c4574c2ff54daf354f00d3d1f82abc6f459
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/qwindowsintegration.cpp b/src/plugins/platforms/windows/qwindowsintegration.cpp
index b7309c3f7c..3f030ffca7 100644
--- a/src/plugins/platforms/windows/qwindowsintegration.cpp
+++ b/src/plugins/platforms/windows/qwindowsintegration.cpp
@@ -279,6 +279,12 @@ static inline unsigned parseOptions(const QStringList &paramList)
             } else if (param.endsWith(QLatin1String("native"))) {
                 options |= QWindowsIntegration::FontDatabaseNative;
             }
+        } else if (param.startsWith(QLatin1String("dialogs="))) {
+            if (param.endsWith(QLatin1String("xp"))) {
+                options |= QWindowsIntegration::XpNativeDialogs;
+            } else if (param.endsWith(QLatin1String("none"))) {
+                options |= QWindowsIntegration::NoNativeDialogs;
+            }
         } else if (param == QLatin1String("gl=gdi")) {
             options |= QWindowsIntegration::DisableArb;
         }