QCommandLineParser: Show usage and errors in message boxes on Windows.

Use the Windows MessageBox API if no console window can be obtained.

[ChangeLog][QtCore][QCommandLineParser] Message boxes are used
to display errors and usage if no console window can be obtained
on Windows.

Change-Id: I63ee8e4d8bd78db83e688fd69374779102562aa3
Reviewed-by: David Faure <david.faure@kdab.com>

1 files changed, 1 insertions, 8 deletions

diff --git a/examples/widgets/gestures/imagegestures/main.cpp b/examples/widgets/gestures/imagegestures/main.cpp
index 80f275bd5f..5fca0d6895 100644
--- a/examples/widgets/gestures/imagegestures/main.cpp
+++ b/examples/widgets/gestures/imagegestures/main.cpp
@@ -82,14 +82,7 @@ int main(int argc, char *argv[])
                         "qt.examples.imagegestures.debug=true\n");
     commandLineParser.setApplicationDescription(description);
 
-    if (!commandLineParser.parse(QCoreApplication::arguments())) {
-        showHelp(commandLineParser, commandLineParser.errorText());
-        return -1;
-    }
-    if (commandLineParser.isSet(helpOption)) {
-        showHelp(commandLineParser);
-        return 0;
-    }
+    commandLineParser.process(QCoreApplication::arguments());
 
     QStringList arguments = commandLineParser.positionalArguments();
     if (!arguments.isEmpty() && !QFileInfo(arguments.front()).isDir()) {