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a/src/qtgui/preview_w.h b/src/qtgui/preview_w.h
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    virtual void searchTextFromIndex(int);
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    virtual void searchTextFromIndex(int);
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    virtual void doSearch(const QString& str, bool next, bool reverse,
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    virtual void doSearch(const QString& str, bool next, bool reverse,
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              bool wo = false);
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              bool wo = false);
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    virtual void nextPressed();
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    virtual void nextPressed();
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    virtual void prevPressed();
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    virtual void prevPressed();
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    virtual void currentChanged(QWidget *tw);
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    virtual void currentChanged(int);
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    virtual void closeCurrentTab();
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    virtual void closeCurrentTab();
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    virtual void emitSaveDocToFile();
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    virtual void emitSaveDocToFile();
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    virtual void togglePlainPre();
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    virtual void togglePlainPre();
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signals:
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signals: