documenthandler.h Example File | Qt Quick Controls 2 5.9

Qt 5.9 | Qt Quick Controls 2 | Qt Quick Controls 2 - Text Editor | documenthandler.h Example File

Qt 5.9.3 Reference Documentation

# documenthandler.h Example File

texteditor/documenthandler.h

      /****************************************************************************
      **
      ** Copyright (C) 2017 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, you may use this file under the terms of the BSD license
      ** as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
      **
      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #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