init roleNames only one time

Change-Id: I61e120c2e5c4a036c001b410331e09993d7594d6
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/projectexplorer/projectwelcomepage.cpp

@@ -94,14 +94,15 @@ QVariant SessionModel::data(const QModelIndex &index, int role) const
 
 QHash<int, QByteArray> SessionModel::roleNames() const
 {
-    QHash<int, QByteArray> roleNames;
-    roleNames[Qt::DisplayRole] = "sessionName";
-    roleNames[DefaultSessionRole] = "defaultSession";
-    roleNames[ActiveSessionRole] = "activeSession";
-    roleNames[LastSessionRole] = "lastSession";
-    roleNames[ProjectsPathRole] = "projectsPath";
-    roleNames[ProjectsDisplayRole] = "projectsName";
-    return roleNames;
+    static QHash<int, QByteArray> extraRoles{
+        {Qt::DisplayRole, "sessionName"},
+        {DefaultSessionRole, "defaultSession"},
+        {ActiveSessionRole, "activeSession"},
+        {LastSessionRole, "lastSession"},
+        {ProjectsPathRole, "projectsPath"},
+        {ProjectsDisplayRole, "projectsName"}
+    };
+    return QAbstractListModel::roleNames() + extraRoles;
 }
 
 bool SessionModel::isDefaultVirgin() const
@@ -180,6 +181,8 @@ QVariant ProjectModel::data(const QModelIndex &index, int role) const
     switch (role) {
     case Qt::DisplayRole:
         return data.second;
+    case Qt::ToolTipRole:
+        return data.first;
     case FilePathRole:
         return data.first;
     case PrettyFilePathRole:
@@ -191,11 +194,11 @@ QVariant ProjectModel::data(const QModelIndex &index, int role) const
 
 QHash<int, QByteArray> ProjectModel::roleNames() const
 {
-    QHash<int, QByteArray> roleNames;
-    roleNames[Qt::DisplayRole] = "displayName";
-    roleNames[FilePathRole] = "filePath";
-    roleNames[PrettyFilePathRole] = "prettyFilePath";
-    return roleNames;
+    static QHash<int, QByteArray> extraRoles{
+        {FilePathRole, "filePath"},
+        {PrettyFilePathRole, "prettyFilePath"}
+    };
+    return QAbstractListModel::roleNames().unite(extraRoles);
 }
 
 void ProjectModel::resetProjects()

src/plugins/qmldesigner/components/propertyeditor/gradientmodel.cpp

@@ -56,11 +56,12 @@ int GradientModel::rowCount(const QModelIndex & /*parent*/) const
 
 QHash<int, QByteArray> GradientModel::roleNames() const
 {
-    QHash<int, QByteArray> roleNames;
-    roleNames[Qt::UserRole + 1] = "position";
-    roleNames[Qt::UserRole + 2] = "color";
-    roleNames[Qt::UserRole + 3] = "readOnly";
-    roleNames[Qt::UserRole + 4] = "index";
+    static QHash<int, QByteArray> roleNames{
+        {Qt::UserRole + 1, "position"},
+        {Qt::UserRole + 2, "color"},
+        {Qt::UserRole + 3, "readOnly"},
+        {Qt::UserRole + 4, "index"}
+    };
 
     return roleNames;
 }

src/plugins/qmldesigner/components/stateseditor/stateseditormodel.cpp

@@ -124,10 +124,11 @@ QVariant StatesEditorModel::data(const QModelIndex &index, int role) const
 
 QHash<int, QByteArray> StatesEditorModel::roleNames() const
 {
-    QHash<int, QByteArray> roleNames;
-    roleNames.insert(StateNameRole, "stateName");
-    roleNames.insert(StateImageSourceRole, "stateImageSource");
-    roleNames.insert(InternalNodeId, "internalNodeId");
+    static QHash<int, QByteArray> roleNames{
+        {StateNameRole, "stateName"},
+        {StateImageSourceRole, "stateImageSource"},
+        {InternalNodeId, "internalNodeId"}
+    };
     return roleNames;
 }
 

src/plugins/qmlprofiler/flamegraphmodel.cpp

@@ -250,20 +250,21 @@ QVariant FlameGraphModel::data(const QModelIndex &index, int role) const
 
 QHash<int, QByteArray> FlameGraphModel::roleNames() const
 {
-    QHash<int, QByteArray> names = QAbstractItemModel::roleNames();
-    names[TypeIdRole] = "typeId";
-    names[TypeRole] = "type";
-    names[DurationRole] = "duration";
-    names[CallCountRole] = "callCount";
-    names[DetailsRole] = "details";
-    names[FilenameRole] = "filename";
-    names[LineRole] = "line";
-    names[ColumnRole] = "column";
-    names[NoteRole] = "note";
-    names[TimePerCallRole] = "timePerCall";
-    names[TimeInPercentRole] = "timeInPercent";
-    names[RangeTypeRole] = "rangeType";
-    return names;
+    static QHash<int, QByteArray> extraRoles{
+        {TypeIdRole, "typeId"},
+        {TypeRole, "type"},
+        {DurationRole, "duration"},
+        {CallCountRole, "callCount"},
+        {DetailsRole, "details"},
+        {FilenameRole, "filename"},
+        {LineRole, "line"},
+        {ColumnRole, "column"},
+        {NoteRole, "note"},
+        {TimePerCallRole, "timePerCall"},
+        {TimeInPercentRole, "timeInPercent"},
+        {RangeTypeRole, "rangeType"}
+    };
+    return QAbstractItemModel::roleNames().unite(extraRoles);
 }
 
 QmlProfilerModelManager *FlameGraphModel::modelManager() const

src/plugins/qtsupport/exampleslistmodel.cpp

@@ -188,10 +188,11 @@ int ExampleSetModel::getExtraExampleSetIndex(int i) const
 
 QHash<int, QByteArray> ExampleSetModel::roleNames() const
 {
-    QHash<int, QByteArray> roleNames;
-    roleNames[Qt::UserRole + 1] = "text";
-    roleNames[Qt::UserRole + 2] = "QtId";
-    roleNames[Qt::UserRole + 3] = "extraSetIndex";
+    static QHash<int, QByteArray> roleNames{
+        {Qt::UserRole + 1, "text"},
+        {Qt::UserRole + 2, "QtId"},
+        {Qt::UserRole + 3, "extraSetIndex"}
+    };
     return roleNames;
 }
 
@@ -680,24 +681,25 @@ QVariant ExamplesListModel::data(const QModelIndex &index, int role) const
 
 QHash<int, QByteArray> ExamplesListModel::roleNames() const
 {
-    QHash<int, QByteArray> roleNames;
-    roleNames[Name] = "name";
-    roleNames[ProjectPath] = "projectPath";
-    roleNames[ImageUrl] = "imageUrl";
-    roleNames[Description] = "description";
-    roleNames[DocUrl] = "docUrl";
-    roleNames[FilesToOpen] = "filesToOpen";
-    roleNames[MainFile] = "mainFile";
-    roleNames[Tags] = "tags";
-    roleNames[Difficulty] = "difficulty";
-    roleNames[Type] = "type";
-    roleNames[HasSourceCode] = "hasSourceCode";
-    roleNames[Dependencies] = "dependencies";
-    roleNames[IsVideo] = "isVideo";
-    roleNames[VideoUrl] = "videoUrl";
-    roleNames[VideoLength] = "videoLength";
-    roleNames[Platforms] = "platforms";
-    roleNames[IsHighlighted] = "isHighlighted";
+    static QHash<int, QByteArray> roleNames{
+        {Name, "name"},
+        {ProjectPath, "projectPath"},
+        {ImageUrl, "imageUrl"},
+        {Description, "description"},
+        {DocUrl, "docUrl"},
+        {FilesToOpen, "filesToOpen"},
+        {MainFile, "mainFile"},
+        {Tags, "tags"},
+        {Difficulty, "difficulty"},
+        {Type, "type"},
+        {HasSourceCode, "hasSourceCode"},
+        {Dependencies, "dependencies"},
+        {IsVideo, "isVideo"},
+        {VideoUrl, "videoUrl"},
+        {VideoLength, "videoLength"},
+        {Platforms, "platforms"},
+        {IsHighlighted, "isHighlighted"}
+    };
     return roleNames;
 }