mirror of https://github.com/JakubMelka/PDF4QT.git
148 lines
4.5 KiB
C++
148 lines
4.5 KiB
C++
// Copyright (C) 2020 Jakub Melka
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//
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// This file is part of PdfForQt.
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//
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// PdfForQt is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// PdfForQt is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with PDFForQt. If not, see <https://www.gnu.org/licenses/>.
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#ifndef PDFTEXTTOSPEECH_H
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#define PDFTEXTTOSPEECH_H
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#include "pdftextlayout.h"
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#include <QObject>
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class QLabel;
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class QSlider;
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class QComboBox;
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class QToolButton;
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class QTextBrowser;
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class QTextToSpeech;
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namespace pdf
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{
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class PDFDocument;
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class PDFDrawWidgetProxy;
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class PDFModifiedDocument;
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}
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namespace pdfviewer
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{
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class PDFViewerSettings;
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/// Text to speech engine used to reading the document
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class PDFTextToSpeech : public QObject
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{
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Q_OBJECT
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private:
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using BaseClass = QObject;
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public:
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explicit PDFTextToSpeech(QObject* parent);
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enum State
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{
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Invalid, ///< Text to speech engine is invalid (maybe bad engine)
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NoDocument, ///< No document to read
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Ready, ///< Ready to read the document contents
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Playing, ///< Document is being read
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Paused, ///< User paused the reading
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Error ///< Error occured in text to speech engine
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};
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/// Returns true, if text to speech engine is valid and can be used
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/// to synthetise text.
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bool isValid() const;
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/// Sets active document to text to speech engine
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void setDocument(const pdf::PDFModifiedDocument& document);
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/// Apply settings to the reader
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void setSettings(const PDFViewerSettings* viewerSettings);
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/// Set draw proxy
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void setProxy(pdf::PDFDrawWidgetProxy* proxy);
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/// Initialize the ui, which is used
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void initializeUI(QComboBox* speechLocaleComboBox,
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QComboBox* speechVoiceComboBox,
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QSlider* speechRateEdit,
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QSlider* speechPitchEdit,
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QSlider* speechVolumeEdit,
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QToolButton* speechPlayButton,
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QToolButton* speechPauseButton,
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QToolButton* speechStopButton,
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QToolButton* speechSynchronizeButton,
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QLabel* speechRateValueLabel,
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QLabel* speechPitchValueLabel,
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QLabel* speechVolumeValueLabel,
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QTextBrowser* speechActualTextBrowser);
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private:
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/// Updates UI controls depending on the state
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void updateUI();
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/// Stop the engine, if it is reading
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void stop();
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void setLocale(const QString& locale);
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void setVoice(const QString& voice);
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void setRate(const double rate);
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void setPitch(const double pitch);
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void setVolume(const double volume);
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void onLocaleChanged();
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void onVoiceChanged();
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void onRateChanged(int rate);
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void onPitchChanged(int pitch);
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void onVolumeChanged(int volume);
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void onPlayClicked();
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void onPauseClicked();
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void onStopClicked();
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void updatePlay();
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void updateToNextPage(pdf::PDFInteger pageIndex);
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QTextToSpeech* m_textToSpeech;
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const pdf::PDFDocument* m_document;
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pdf::PDFDrawWidgetProxy* m_proxy;
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State m_state;
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bool m_initialized;
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QComboBox* m_speechLocaleComboBox;
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QComboBox* m_speechVoiceComboBox;
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QSlider* m_speechRateEdit;
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QSlider* m_speechVolumeEdit;
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QSlider* m_speechPitchEdit;
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QToolButton* m_speechPlayButton;
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QToolButton* m_speechPauseButton;
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QToolButton* m_speechStopButton;
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QToolButton* m_speechSynchronizeButton;
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QLabel* m_speechRateValueLabel;
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QLabel* m_speechPitchValueLabel;
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QLabel* m_speechVolumeValueLabel;
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QTextBrowser* m_speechActualTextBrowser;
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pdf::PDFTextLayout m_currentTextLayout; ///< Text layout for actual page
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pdf::PDFTextFlows m_textFlows; ///< Text flows for actual page
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size_t m_currentTextFlowIndex = 0; ///< Index of current text flow
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pdf::PDFInteger m_currentPage = 0; ///< Current page
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};
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} // namespace pdfviewer
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#endif // PDFTEXTTOSPEECH_H
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