documenthandler.h Example File

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  #ifndef DOCUMENTHANDLER_H
  #define DOCUMENTHANDLER_H

  #include <QFont>
  #include <QObject>
  #include <QTextCursor>
  #include <QUrl>

  class QTextDocument;
  class QQuickTextDocument;

  class DocumentHandler : public QObject
  {
      Q_OBJECT

      Q_PROPERTY(QQuickTextDocument *document READ document WRITE setDocument NOTIFY documentChanged)
      Q_PROPERTY(int cursorPosition READ cursorPosition WRITE setCursorPosition NOTIFY cursorPositionChanged)
      Q_PROPERTY(int selectionStart READ selectionStart WRITE setSelectionStart NOTIFY selectionStartChanged)
      Q_PROPERTY(int selectionEnd READ selectionEnd WRITE setSelectionEnd NOTIFY selectionEndChanged)

      Q_PROPERTY(QColor textColor READ textColor WRITE setTextColor NOTIFY textColorChanged)
      Q_PROPERTY(QString fontFamily READ fontFamily WRITE setFontFamily NOTIFY fontFamilyChanged)
      Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment NOTIFY alignmentChanged)

      Q_PROPERTY(bool bold READ bold WRITE setBold NOTIFY boldChanged)
      Q_PROPERTY(bool italic READ italic WRITE setItalic NOTIFY italicChanged)
      Q_PROPERTY(bool underline READ underline WRITE setUnderline NOTIFY underlineChanged)

      Q_PROPERTY(int fontSize READ fontSize WRITE setFontSize NOTIFY fontSizeChanged)

      Q_PROPERTY(QString fileName READ fileName NOTIFY fileUrlChanged)
      Q_PROPERTY(QString fileType READ fileType NOTIFY fileUrlChanged)
      Q_PROPERTY(QUrl fileUrl READ fileUrl NOTIFY fileUrlChanged)

  public:
      explicit DocumentHandler(QObject *parent = nullptr);

      QQuickTextDocument *document() const;
      void setDocument(QQuickTextDocument *document);

      int cursorPosition() const;
      void setCursorPosition(int position);

      int selectionStart() const;
      void setSelectionStart(int position);

      int selectionEnd() const;
      void setSelectionEnd(int position);

      QString fontFamily() const;
      void setFontFamily(const QString &family);

      QColor textColor() const;
      void setTextColor(const QColor &color);

      Qt::Alignment alignment() const;
      void setAlignment(Qt::Alignment alignment);

      bool bold() const;
      void setBold(bool bold);

      bool italic() const;
      void setItalic(bool italic);

      bool underline() const;
      void setUnderline(bool underline);

      int fontSize() const;
      void setFontSize(int size);

      QString fileName() const;
      QString fileType() const;
      QUrl fileUrl() const;

  public Q_SLOTS:
      void load(const QUrl &fileUrl);
      void saveAs(const QUrl &fileUrl);

  Q_SIGNALS:
      void documentChanged();
      void cursorPositionChanged();
      void selectionStartChanged();
      void selectionEndChanged();

      void fontFamilyChanged();
      void textColorChanged();
      void alignmentChanged();

      void boldChanged();
      void italicChanged();
      void underlineChanged();

      void fontSizeChanged();

      void textChanged();
      void fileUrlChanged();

      void loaded(const QString &text);
      void error(const QString &message);

  private:
      void reset();
      QTextCursor textCursor() const;
      QTextDocument *textDocument() const;
      void mergeFormatOnWordOrSelection(const QTextCharFormat &format);

      QQuickTextDocument *m_document;

      int m_cursorPosition;
      int m_selectionStart;
      int m_selectionEnd;

      QFont m_font;
      int m_fontSize;
      QUrl m_fileUrl;
  };

  #endif // DOCUMENTHANDLER_H