Add AsynchronousMessageBox

QMessageBox::warning is executing it's own event loop which leads to
crashes. Better is to use a message box which is using the main event
loop.

Change-Id: Ie05985dffcf505b25113755eece9b5e2256cd289
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

src/libs/utils/messagebox.cpp

@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://www.qt.io/licensing.  For further information
+** use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "messagebox.h"
+
+#include <QMessageBox>
+#include <QApplication>
+
+namespace Utils {
+namespace AsynchronousMessageBox {
+
+namespace {
+QWidget *dialogParent()
+{
+    QWidget *active = QApplication::activeModalWidget();
+
+    if (!active) {
+        QList<QWidget*> topLevelWidgets = QApplication::topLevelWidgets();
+        if (!topLevelWidgets.isEmpty())
+            return topLevelWidgets.first();
+    }
+
+    return nullptr;
+}
+}
+void warning(const QString &title, const QString &desciption)
+{
+    QMessageBox *messageBox = new QMessageBox(QMessageBox::Warning,
+                                              title,
+                                              desciption,
+                                              QMessageBox::Ok,
+                                              dialogParent());
+
+    messageBox->setAttribute(Qt::WA_DeleteOnClose);
+    messageBox->setModal(true);
+    messageBox->show();
+}
+
+}
+}

src/libs/utils/messagebox.h

@@ -0,0 +1,48 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://www.qt.io/licensing.  For further information
+** use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#ifndef MESSAGEBOX_H
+#define MESSAGEBOX_H
+
+#include "utils_global.h"
+
+QT_BEGIN_NAMESPACE
+class QString;
+QT_END_NAMESPACE
+
+namespace Utils {
+namespace AsynchronousMessageBox {
+
+    QTCREATOR_UTILS_EXPORT void warning(const QString &title, const QString &desciption);
+}
+}
+
+#endif // MESSAGEBOX_H
+

src/libs/utils/utils-lib.pri

@@ -93,7 +93,8 @@ SOURCES += $$PWD/environment.cpp \
     $$PWD/treeviewcombobox.cpp \
     $$PWD/proxycredentialsdialog.cpp \
     $$PWD/macroexpander.cpp \
-    $$PWD/theme/theme.cpp
+    $$PWD/theme/theme.cpp \
+    $$PWD/messagebox.cpp
 
 win32:SOURCES += $$PWD/consoleprocess_win.cpp
 else:SOURCES += $$PWD/consoleprocess_unix.cpp
@@ -192,7 +193,8 @@ HEADERS += \
     $$PWD/proxycredentialsdialog.h \
     $$PWD/macroexpander.h \
     $$PWD/theme/theme.h \
-    $$PWD/theme/theme_p.h
+    $$PWD/theme/theme_p.h \
+    $$PWD/ messagebox.h
 
 FORMS += $$PWD/filewizardpage.ui \
     $$PWD/projectintropage.ui \

src/libs/utils/utils.qbs

@@ -106,6 +106,8 @@ QtcLibrary {
         "listutils.h",
         "macroexpander.cpp",
         "macroexpander.h",
+        "messagebox.cpp",
+        "messagebox.h",
         "multitask.h",
         "navigationtreeview.cpp",
         "navigationtreeview.h",