QmlProfiler: Warn user if Qt is too old

Check for the Qt version in teh active build configuration. If
it's too old warn the user that we require 4.7.4.

(The app running doesn't necessarily have to have the same Qt version,
so this is just an approximation).

Change-Id: Id1f31e4f0734448712dd48ecf6526ca89da45b8b
Reviewed-on: http://codereview.qt.nokia.com/460


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Christiaan Janssen <christiaan.janssen@nokia.com>

src/plugins/analyzerbase/analyzerruncontrol.cpp

@@ -75,6 +75,9 @@ AnalyzerRunControl::AnalyzerRunControl(const AnalyzerStartParameters &sp,
     IAnalyzerTool *tool = AnalyzerManager::instance()->currentTool();
     d->m_engine = tool->createEngine(sp, runConfiguration);
 
+    if (!d->m_engine)
+        return;
+
     connect(d->m_engine, SIGNAL(outputReceived(QString,Utils::OutputFormat)),
             SLOT(receiveOutput(QString,Utils::OutputFormat)));
     connect(d->m_engine, SIGNAL(taskToBeAdded(ProjectExplorer::Task::TaskType,QString,QString,int)),
@@ -94,6 +97,11 @@ AnalyzerRunControl::~AnalyzerRunControl()
 
 void AnalyzerRunControl::start()
 {
+    if (!d->m_engine) {
+        emit finished();
+        return;
+    }
+
     // clear about-to-be-outdated tasks
     ExtensionSystem::PluginManager *pm = ExtensionSystem::PluginManager::instance();
     ProjectExplorer::TaskHub *hub = pm->getObject<ProjectExplorer::TaskHub>();
@@ -106,7 +114,7 @@ void AnalyzerRunControl::start()
 
 ProjectExplorer::RunControl::StopResult AnalyzerRunControl::stop()
 {
-    if (!d->m_isRunning)
+    if (!d->m_engine || !d->m_isRunning)
         return StoppedSynchronously;
 
     d->m_engine->stop();
@@ -127,6 +135,8 @@ bool AnalyzerRunControl::isRunning() const
 
 QString AnalyzerRunControl::displayName() const
 {
+    if (!d->m_engine)
+        return QString();
     return d->m_engine->startParameters().displayName;
 }
 

src/plugins/qmlprofiler/qmlprofilertool.cpp

@@ -68,14 +68,17 @@
 #include <coreplugin/editormanager/editormanager.h>
 #include <coreplugin/icore.h>
 
+#include <qt4projectmanager/qt4buildconfiguration.h>
 #include <qt4projectmanager/qt-s60/s60deployconfiguration.h>
 
 #include <QtCore/QFile>
 
+#include <QtGui/QApplication>
 #include <QtGui/QHBoxLayout>
 #include <QtGui/QLabel>
 #include <QtGui/QTabWidget>
 #include <QtGui/QToolButton>
+#include <QtGui/QMessageBox>
 
 using namespace Analyzer;
 using namespace QmlProfiler::Internal;
@@ -156,6 +159,22 @@ IAnalyzerEngine *QmlProfilerTool::createEngine(const AnalyzerStartParameters &sp
 {
     QmlProfilerEngine *engine = new QmlProfilerEngine(sp, runConfiguration);
 
+    // Check minimum Qt Version. We cannot really be sure what the Qt version at runtime is,
+    // but guess that the active build configuraiton has been used.
+    QtSupport::QtVersionNumber minimumVersion(4,7,4);
+    if (Qt4ProjectManager::Qt4BuildConfiguration *qt4Config
+            = qobject_cast<Qt4ProjectManager::Qt4BuildConfiguration*>(
+                runConfiguration->target()->activeBuildConfiguration())) {
+        if (qt4Config->qtVersion()->isValid() && qt4Config->qtVersion()->qtVersion() < minimumVersion) {
+            int result = QMessageBox::warning(QApplication::activeWindow(), tr("QML Profiler"),
+                                 "The QML profiler requires Qt 4.7.4 or newer.\n"
+                                 "The Qt version configured in your active build configuration is too old.\n"
+                                 "Do you want to continue?", QMessageBox::Yes, QMessageBox::No);
+            if (result == QMessageBox::No)
+                return 0;
+        }
+    }
+
     d->m_connectMode = QmlProfilerToolPrivate::TcpConnection;
 
     if (Qt4ProjectManager::S60DeployConfiguration *deployConfig