4 files changed, 5 insertions, 5 deletions
diff --git a/examples/tools/treemodelcompleter/treemodelcompleter.h b/examples/tools/treemodelcompleter/treemodelcompleter.h
index 953be62c5d..a7234a4960 100644
--- a/examples/tools/treemodelcompleter/treemodelcompleter.h
+++ b/examples/tools/treemodelcompleter/treemodelcompleter.h
@@ -50,8 +50,8 @@ class TreeModelCompleter : public QCompleter
     Q_PROPERTY(QString separator READ separator WRITE setSeparator)
 
 public:
-    TreeModelCompleter(QObject *parent = 0);
-    TreeModelCompleter(QAbstractItemModel *model, QObject *parent = 0);
+    explicit TreeModelCompleter(QObject *parent = 0);
+    explicit TreeModelCompleter(QAbstractItemModel *model, QObject *parent = 0);
 
     QString separator() const;
 public slots:
diff --git a/examples/tools/undo/document.h b/examples/tools/undo/document.h
index 713094cce3..4ffbe473d0 100644
--- a/examples/tools/undo/document.h
+++ b/examples/tools/undo/document.h
@@ -52,7 +52,7 @@ class Shape
 public:
     enum Type { Rectangle, Circle, Triangle };
 
-    Shape(Type type = Rectangle, const QColor &color = Qt::red, const QRect &rect = QRect());
+    explicit Shape(Type type = Rectangle, const QColor &color = Qt::red, const QRect &rect = QRect());
 
     Type type() const;
     QString name() const;
diff --git a/examples/tools/undoframework/commands.h b/examples/tools/undoframework/commands.h
index 70667e9f2d..72f61b10a6 100644
--- a/examples/tools/undoframework/commands.h
+++ b/examples/tools/undoframework/commands.h
@@ -70,7 +70,7 @@ private:
 class DeleteCommand : public QUndoCommand
 {
 public:
-    DeleteCommand(QGraphicsScene *graphicsScene, QUndoCommand *parent = 0);
+    explicit DeleteCommand(QGraphicsScene *graphicsScene, QUndoCommand *parent = 0);
 
     void undo();
     void redo();
diff --git a/examples/tools/undoframework/diagramitem.h b/examples/tools/undoframework/diagramitem.h
index 849ef2132b..91ed55be39 100644
--- a/examples/tools/undoframework/diagramitem.h
+++ b/examples/tools/undoframework/diagramitem.h
@@ -56,7 +56,7 @@ public:
     enum { Type = UserType + 1 };
     enum DiagramType { Box, Triangle };
 
-    DiagramItem(DiagramType diagramType, QGraphicsItem *item = 0);
+    explicit DiagramItem(DiagramType diagramType, QGraphicsItem *item = 0);
 
     DiagramType diagramType() const {
         return polygon() == boxPolygon ? Box : Triangle;