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140 lines
4.6 KiB
140 lines
4.6 KiB
/***************************************************************************
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* Copyright (C) 2005 by Alexander Nemish *
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* atlanter@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program 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 General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifndef RENDERER_H
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#define RENDERER_H
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#include <tqstringlist.h>
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#include <tqfont.h>
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#include <tqstring.h>
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#include <tqobject.h>
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#include <tqsize.h>
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#include <tqtimer.h>
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#include <vector>
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#include <memory>
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class TQStringList;
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class TextLine
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{
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public:
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static const int PARA_NONE = 0;
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static const int PARA_START = 1;
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static const int PARA_END = 2;
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static const int PARA_BOTH = 3;
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TextLine(int index, int begin, int end, int paraFlags = PARA_NONE):
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m_paragraphFlags(paraFlags),
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m_begin(begin),
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m_end(end),
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m_index(index)
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{}
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bool isParaStart() const { return m_paragraphFlags & PARA_START; }
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bool isParaEnd() const { return m_paragraphFlags & PARA_END; }
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void setParagraphFlags(int flags) { m_paragraphFlags = flags; }
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const int paragraphFlags() const { return m_paragraphFlags; }
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const int paragraphIndex() const { return m_index; }
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const int begin() const { return m_begin; }
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const int end() const { return m_end; }
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const int size() const { return m_end - m_begin; }
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private:
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int m_paragraphFlags;
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int m_begin;
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int m_end;
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int m_index;
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};
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/**
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* \brief Renders input text into list of word wrapped strings
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* \author Alexandr Nemish <anemish@gmail.com>
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*/
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class Renderer : public TQObject
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{
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TQ_OBJECT
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public:
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Renderer();
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~Renderer();
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/// \brief Loads and renders list of strings
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void load(const TQStringList & list);
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/// \brief Renders loaded list of strings
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void render();
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/// \brief Clears all rendered data
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void clear();
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/// \brief Draws page
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void drawPage(TQPainter & paint, TQRect rect, int pageNumber);
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//Getters
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/// \brief Returns whether the text is empty
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bool isEmpty() const { return m_text.empty(); };
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/// \brief Returns current font
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TQFont font() const { return m_font; }
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/// \brief Returns current paragraph offset in pixels
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int paraOffset() const { return m_paraOffset; }
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/// \brief Returns the number of pages
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int pageCount() const { return m_pageCount; }
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/// \brief Returns page size in pixels
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TQSize pageSize() const { return m_pageSize; }
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//Setters
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/// \brief Sets current font
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void setFont(const TQFont & font);
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/// \brief Sets current paragraph offset in pixels
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void setParaOffset(int offset);
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/// \brief Sets size of a page
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void setPageSize(const TQSize & size);
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bool busy() const { return m_isRendering; }
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signals:
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void renderingFinished();
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private slots:
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void timeout();
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private:
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typedef TQStringList::const_iterator TStringIter;
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typedef std::vector<TQString> TParagraphs;
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typedef TParagraphs::size_type TIndex;
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typedef std::vector<TextLine> TLines;
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//make it non-copyable
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Renderer(const Renderer &);
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Renderer & operator = (const Renderer &);
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/// \brief Renders input paragraph into list of wrapped lines
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void parseParagraph(TIndex idx);
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/// \brief Returns width of string in pixels
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int width(const TQString & a_string) const;
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void addLine(TextLine line);
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int wordAt(const TQString & str, int len);
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TQString getWord(const TQString & str, int idx);
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/// \brief Draws justified string
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void drawLine(TQPainter& paint, int x, int y, const TLines::size_type idx);
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void cancel();
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TParagraphs m_text;
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TLines m_lines;
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int m_pageCount;
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int m_linesPerPage;
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int m_paraOffset;
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TQFont m_font;
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std::unique_ptr<TQFontMetrics> m_fontMetrics;
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TQSize m_pageSize;
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bool m_isStartAdded;
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TIndex m_curParagraph;
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bool m_isRendering;
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TQTimer m_timer;
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};
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#endif
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