lyx_mirror/src/frontends/qt4/GuiPainter.h

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// -*- C++ -*-
/**
* \file GuiPainter.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
* \author Abdelrazak Younes
*
* Full author contact details are available in file CREDITS.
*/
#ifndef GUIPAINTER_H
#define GUIPAINTER_H
#include "frontends/Painter.h"
#include <QPainter>
#include <stack>
class QString;
namespace lyx {
class FontInfo;
namespace frontend {
/**
* GuiPainter - a painter implementation for Qt4
*/
class GuiPainter : public QPainter, public Painter {
public:
GuiPainter(QPaintDevice *);
virtual ~GuiPainter();
/// draw a line from point to point
virtual void line(
int x1, int y1,
int x2, int y2,
ColorCode,
line_style = line_solid,
line_width = line_thin);
/**
* lines - draw a set of lines
* @param xp array of points' x co-ords
* @param yp array of points' y co-ords
* @param np size of the points array
*/
virtual void lines(
int const * xp,
int const * yp,
int np,
ColorCode,
line_style = line_solid,
line_width = line_thin);
/// draw a rectangle
virtual void rectangle(
int x, int y,
int w, int h,
ColorCode,
line_style = line_solid,
line_width = line_thin);
/// draw a filled rectangle
virtual void fillRectangle(
int x, int y,
int w, int h,
ColorCode);
/// draw an arc
virtual void arc(
int x, int y,
unsigned int w, unsigned int h,
int a1, int a2,
ColorCode);
/// draw a pixel
virtual void point(
int x, int y,
ColorCode);
/// draw an image from the image cache
virtual void image(int x, int y,
int w, int h,
lyx::graphics::Image const & image);
/// draw a string at position x, y (y is the baseline)
virtual int text(int x, int y,
docstring const & str, FontInfo const & f);
/// draw a char at position x, y (y is the baseline)
virtual int text(int x, int y, char_type c, FontInfo const & f);
/// start monochrome painting mode, i.e. map every color into [min,max]
virtual void enterMonochromeMode(ColorCode const & min,
ColorCode const & max);
/// leave monochrome painting mode
virtual void leaveMonochromeMode();
private:
/// draw small caps text
/**
\return width of the drawn text.
*/
int smallCapsText(int x, int y,
QString const & str, FontInfo const & f);
/// set pen parameters
void setQPainterPen(QColor const & col,
line_style ls = line_solid,
line_width lw = line_thin);
QColor current_color_;
Painter::line_style current_ls_;
Painter::line_width current_lw_;
///
bool const use_pixmap_cache_;
///
std::stack<QColor> monochrome_min_;
///
std::stack<QColor> monochrome_max_;
/// convert into Qt color, possibly applying the monochrome mode
QColor computeColor(ColorCode col);
/// possibly apply monochrome mode
QColor filterColor(QColor const & col);
///
QString generateStringSignature(QString const & str, FontInfo const & f);
};
} // namespace frontend
} // namespace lyx
#endif // GUIPAINTER_H