ModelEditor: Use more explicit constructors

Change-Id: I67880be3f463ae8fb6bf3243114f90bd9bb78104
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

src/libs/3rdparty/modeling/qmt/diagram_scene/diagramscenemodel.cpp

@@ -72,7 +72,7 @@ namespace qmt {
 class DiagramSceneModel::OriginItem : public QGraphicsItem
 {
 public:
-    OriginItem(QGraphicsItem *parent = 0)
+    explicit OriginItem(QGraphicsItem *parent = 0)
         : QGraphicsItem(parent)
     {
     }

src/libs/3rdparty/modeling/qmt/diagram_scene/items/annotationitem.cpp

@@ -58,7 +58,7 @@ static const qreal CONTENTS_BORDER_HORIZONTAL = 4.0;
 class AnnotationItem::AnnotationTextItem : public QGraphicsTextItem
 {
 public:
-    AnnotationTextItem(QGraphicsItem *parent)
+    explicit AnnotationTextItem(QGraphicsItem *parent)
         : QGraphicsTextItem(parent)
     {
     }

src/libs/3rdparty/modeling/qmt/diagram_scene/items/boundaryitem.cpp

@@ -60,7 +60,7 @@ static const qreal CONTENTS_BORDER_HORIZONTAL = 4.0;
 class BoundaryItem::BoundaryTextItem : public QGraphicsTextItem
 {
 public:
-    BoundaryTextItem(QGraphicsItem *parent)
+    explicit BoundaryTextItem(QGraphicsItem *parent)
         : QGraphicsTextItem(parent)
     {
     }

src/libs/3rdparty/modeling/qmt/diagram_scene/parts/arrowitem.cpp

@@ -48,7 +48,7 @@ namespace qmt {
 class ArrowItem::GraphicsPathItem : public QGraphicsPathItem
 {
 public:
-    GraphicsPathItem(QGraphicsItem *parent)
+    explicit GraphicsPathItem(QGraphicsItem *parent)
         : QGraphicsPathItem(parent)
     {
     }
@@ -65,7 +65,7 @@ public:
 class ArrowItem::GraphicsHeadItem : public QGraphicsItem
 {
 public:
-    GraphicsHeadItem(QGraphicsItem *parent)
+    explicit GraphicsHeadItem(QGraphicsItem *parent)
         : QGraphicsItem(parent)
     {
     }
@@ -250,7 +250,7 @@ private:
 class ArrowItem::GraphicsShaftItem : public ArrowItem::GraphicsPathItem
 {
 public:
-    GraphicsShaftItem(QGraphicsItem *parent)
+    explicit GraphicsShaftItem(QGraphicsItem *parent)
         : GraphicsPathItem(parent)
     {
     }

src/libs/3rdparty/modeling/qmt/model_ui/treemodel.cpp

@@ -74,7 +74,7 @@ private:
 class TreeModel::ItemFactory : public MConstVisitor
 {
 public:
-    ItemFactory(TreeModel *treeModel)
+    explicit ItemFactory(TreeModel *treeModel)
         : m_treeModel(treeModel)
     {
         QMT_CHECK(m_treeModel);

src/libs/3rdparty/modeling/qmt/stereotype/iconshape.cpp

@@ -52,9 +52,7 @@ namespace qmt {
 class IconShape::IconShapePrivate
 {
 public:
-    IconShapePrivate()
-    {
-    }
+    IconShapePrivate() = default;
 
     IconShapePrivate(const IconShapePrivate &rhs)
         : m_shapes(CloneAll(rhs.m_shapes))

src/libs/3rdparty/modeling/qmt/style/stylecontroller.cpp

@@ -41,7 +41,7 @@ namespace qmt {
 class StyleController::Parameters : public StyleEngine::Parameters
 {
 public:
-    Parameters(StyleController *styleController)
+    explicit Parameters(StyleController *styleController)
         : m_styleController(styleController)
     {
     }