lineedit.h Example File

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  #ifndef LINEEDIT_H
  #define LINEEDIT_H

  #include <QLineEdit>

  class LineEditExtension : public QObject
  {
      Q_OBJECT
      Q_PROPERTY(int leftMargin READ leftMargin WRITE setLeftMargin NOTIFY marginsChanged)
      Q_PROPERTY(int rightMargin READ rightMargin WRITE setRightMargin NOTIFY marginsChanged)
      Q_PROPERTY(int topMargin READ topMargin WRITE setTopMargin NOTIFY marginsChanged)
      Q_PROPERTY(int bottomMargin READ bottomMargin WRITE setBottomMargin NOTIFY marginsChanged)
  public:
      LineEditExtension(QObject *);

      int leftMargin() const;
      void setLeftMargin(int);

      int rightMargin() const;
      void setRightMargin(int);

      int topMargin() const;
      void setTopMargin(int);

      int bottomMargin() const;
      void setBottomMargin(int);
  signals:
      void marginsChanged();

  private:
      QLineEdit *m_lineedit;
  };

  #endif // LINEEDIT_H