Cleanup QtWidgets (tools) examples

Cleanup QtWidgets tools examples:
 - use member-init (clang-tidy)
 - fix includes/don't include QtWidgets globally
 - include own header first
 - use nullptr (clang-tidy)
 - avoid c-style casts
 - use QVector instead QList
 - use QItemDelegate instead QStyledItemDelegate

Change-Id: Ibe9440cdf711e5cc2138c054864edebe1fc95731
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

1 files changed, 8 insertions, 6 deletions

diff --git a/examples/widgets/tools/undo/commands.h b/examples/widgets/tools/undo/commands.h
index de3bebd740..ccb550fdd4 100644
--- a/examples/widgets/tools/undo/commands.h
+++ b/examples/widgets/tools/undo/commands.h
@@ -57,7 +57,8 @@
 class AddShapeCommand : public QUndoCommand
 {
 public:
-    AddShapeCommand(Document *doc, const Shape &shape, QUndoCommand *parent = 0);
+    AddShapeCommand(Document *doc, const Shape &shape,
+                    QUndoCommand *parent = nullptr);
     void undo() override;
     void redo() override;
 
@@ -70,7 +71,8 @@ private:
 class RemoveShapeCommand : public QUndoCommand
 {
 public:
-    RemoveShapeCommand(Document *doc, const QString &shapeName, QUndoCommand *parent = 0);
+    RemoveShapeCommand(Document *doc, const QString &shapeName,
+                       QUndoCommand *parent = nullptr);
     void undo() override;
     void redo() override;
 
@@ -83,8 +85,8 @@ private:
 class SetShapeColorCommand : public QUndoCommand
 {
 public:
-    SetShapeColorCommand(Document *doc, const QString &shapeName, const QColor &color,
-                            QUndoCommand *parent = 0);
+    SetShapeColorCommand(Document *doc, const QString &shapeName,
+                         const QColor &color, QUndoCommand *parent = nullptr);
 
     void undo() override;
     void redo() override;
@@ -102,8 +104,8 @@ private:
 class SetShapeRectCommand : public QUndoCommand
 {
 public:
-    SetShapeRectCommand(Document *doc, const QString &shapeName, const QRect &rect,
-                            QUndoCommand *parent = 0);
+    SetShapeRectCommand(Document *doc, const QString &shapeName,
+                        const QRect &rect, QUndoCommand *parent = nullptr);
 
     void undo() override;
     void redo() override;