WelcomeScreen Delay loading of ExamplesModel.

...until the Help system is is initialized properly.

Change-Id: I70b629d246f418629623f09de0d270bf355b71de
Reviewed-on: http://codereview.qt.nokia.com/1021
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Robert Löhning <robert.loehning@nokia.com>

src/plugins/qtsupport/exampleslistmodel.cpp

@@ -39,6 +39,7 @@
 #include <QDebug>
 
 #include <coreplugin/icore.h>
+#include <coreplugin/helpmanager.h>
 #include <qtsupport/qtversionmanager.h>
 
 #include <algorithm>
@@ -67,7 +68,9 @@ ExamplesListModel::ExamplesListModel(QObject *parent) :
     setRoleNames(roleNames);
 
     connect(QtVersionManager::instance(), SIGNAL(updateExamples(QString,QString,QString)),
-            SLOT(readNewsItems(QString,QString,QString)));
+            SLOT(cacheExamplesPath(QString,QString,QString)));
+    connect(Core::HelpManager::instance(), SIGNAL(setupFinished()),
+            SLOT(helpInitialized()));
 }
 
 QList<ExampleItem> ExamplesListModel::parseExamples(QXmlStreamReader* reader, const QString& projectsOffset)
@@ -337,6 +340,20 @@ QVariant ExamplesListModel::data(const QModelIndex &index, int role) const
 
 }
 
+void ExamplesListModel::cacheExamplesPath(const QString &examplesPath, const QString &demosPath, const QString &sourcePath)
+{
+    m_cache = QMakePathCache(examplesPath, demosPath, sourcePath);
+}
+
+void ExamplesListModel::helpInitialized()
+{
+    disconnect(this, SLOT(cacheExamplesPath(QString, QString, QString)));
+    connect(QtVersionManager::instance(), SIGNAL(updateExamples(QString,QString,QString)),
+            SLOT(readNewsItems(QString,QString,QString)));
+    readNewsItems(m_cache.examplesPath, m_cache.demosPath, m_cache.examplesPath);
+}
+
+
 ExamplesListModelFilter::ExamplesListModelFilter(QObject *parent) :
     QSortFilterProxyModel(parent), m_showTutorialsOnly(true)
 {

src/plugins/qtsupport/exampleslistmodel.h

@@ -60,6 +60,15 @@ struct ExampleItem {
     bool hasSourceCode;
 };
 
+struct QMakePathCache {
+    QString examplesPath;
+    QString demosPath;
+    QString sourcePath;
+    QMakePathCache() {}
+    QMakePathCache(const QString &_examplesPath, const QString &_demosPath, const QString &_sourcePath)
+        : examplesPath(_examplesPath), demosPath(_demosPath), sourcePath(_sourcePath) {}
+};
+
 class ExamplesListModel : public QAbstractListModel {
     Q_OBJECT
 public:
@@ -71,12 +80,15 @@ public:
 
     QStringList tags() const { return m_tags; }
 
-public slots:
-    void readNewsItems(const QString &examplesPath, const QString &demosPath, const QString &sourcePath);
 
 signals:
     void tagsUpdated();
 
+public slots:
+    void readNewsItems(const QString &examplesPath, const QString &demosPath, const QString &sourcePath);
+    void cacheExamplesPath(const QString &examplesPath, const QString &demosPath, const QString &sourcePath);
+    void helpInitialized();
+
 private:
     QList<ExampleItem> parseExamples(QXmlStreamReader* reader, const QString& projectsOffset);
     QList<ExampleItem> parseDemos(QXmlStreamReader* reader, const QString& projectsOffset);
@@ -85,6 +97,8 @@ private:
     QStringList exampleSources() const;
     QList<ExampleItem> exampleItems;
     QStringList m_tags;
+    QMakePathCache m_cache;
+
 };
 
 class ExamplesListModelFilter : public QSortFilterProxyModel {

src/plugins/qtsupport/gettingstartedwelcomepage.h

@@ -68,8 +68,6 @@ signals:
 public slots:
     void openSplitHelp(const QUrl &help);
     void openProject(const QString& projectFile, const QStringList& additionalFilesToOpen, const QUrl& help);
-
-public slots:
     void updateTagsModel();
 
 private: