refactoring qad widgets part 2

c++ cast, nullptr, forward declaration, agregate ui, connect to member functions, order and clear includes

libs/widgets/mathvectoredit.h

@@ -20,9 +20,9 @@
 #ifndef MATH_VECTOR_EDIT_H
 #define MATH_VECTOR_EDIT_H
 
-#include <QWidget>
-#include "qad_types.h"
 #include "qad_widgets_export.h"
+#include <QWidget>
+#include <QVariant>
 
 
 class MatrixEdit;
@@ -33,22 +33,21 @@ class QAD_WIDGETS_EXPORT MathVectorEdit: public QWidget {
 	Q_PROPERTY(QVariant value READ value WRITE setValue NOTIFY valueChanged)
 	Q_PROPERTY(bool readOnly READ isReadOnly WRITE setReadOnly)
 public:
-	explicit MathVectorEdit(QWidget * parent = 0);
-	~MathVectorEdit();
+	explicit MathVectorEdit(QWidget * parent = nullptr);
+	~MathVectorEdit() override;
 	
 	QVariant value() const;
 	bool isReadOnly() const;
 	
-private:
-	MatrixEdit * edit;
-	
 public slots:
 	void setValue(const QVariant & v);
 	void setReadOnly(bool yes);
 
 signals:
 	void valueChanged();
-	
+
+private:
+	MatrixEdit * edit;
 };