fltk/draw.h File Reference

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Detailed Description

The FLTK drawing library, used by all widgets to draw themselves.

These functions can only be called when FLTK is setup to draw things. This is only true:

• Inside the Widget::draw() virtual function.
• Inside the Symbol::draw() virtual function.
• After calling Widget::make_current(), before calling wait() or flush(). Calling the drawing functions at other times produces undefined results, including crashing.

Namespaces
namespace	fltk
Classes
class	fltk::GSave
Text
const int *	fltk::column_widths_
Font *	fltk::current_font_
float	fltk::current_size_
const char *	fltk::encoding_
void	fltk::column_widths (const int *i)
const int *	fltk::column_widths ()
void	fltk::drawtext (void(*textfunction)(const char *, int, float, float), float(*getwidth)(const char *, int), const char *str, const Rectangle &r, Flags flags)
void	fltk::drawtext (const char *, const Rectangle &, Flags)
void	fltk::drawtext (const char *, int length, float x, float y)
void	fltk::drawtext (const char *, float x, float y)
void	fltk::drawtext_transformed (const char *, int n, float x, float y)
const char *	fltk::get_encoding ()
float	fltk::getascent ()
float	fltk::getdescent ()
Font *	fltk::getfont ()
float	fltk::getsize ()
float	fltk::getwidth (const char *, int length)
float	fltk::getwidth (const char *)
void	fltk::measure (float(*getwidth)(const char *, int), const char *, float &w, float &h, Flags=0)
void	fltk::measure (const char *, int &w, int &h, Flags=0)
void	fltk::set_encoding (const char *)
void	fltk::setfont (const char *, int attributes, float size)
void	fltk::setfont (const char *, float size)
void	fltk::setfont (Font *, float size)
Images
typedef const uchar *(*	fltk::DrawImageCallback )(void *data, int x, int y, int w, uchar *buffer)
void	fltk::drawimage (DrawImageCallback, void *, PixelType, const Rectangle &)
void	fltk::drawimage (const uchar *, PixelType, const Rectangle &, int linedelta)
void	fltk::drawimage (const uchar *, PixelType, const Rectangle &)
uchar *	fltk::readimage (uchar *p, PixelType, const Rectangle &, int linedelta)
uchar *	fltk::readimage (uchar *p, PixelType, const Rectangle &)
void	fltk::scrollrect (const Rectangle &, int dx, int dy, void(*draw_area)(void *, const Rectangle &), void *)
Enumerations
enum	{   SOLID, DASH, DOT, DASHDOT,   DASHDOTDOT, CAP_FLAT, CAP_ROUND, CAP_SQUARE,   JOIN_MITER, JOIN_ROUND, JOIN_BEVEL }
Functions
Flags	fltk::drawflags (Flags f)
Flags	fltk::drawflags ()
const Style *	fltk::drawstyle ()
void	fltk::drawstyle (const Style *s, Flags)
Color	fltk::getbgcolor ()
Color	fltk::getcolor ()
const char *	fltk::line_dashes ()
int	fltk::line_style ()
void	fltk::line_style (int, float width=0, const char *dashes=0)
float	fltk::line_width ()
void	fltk::setbgcolor (Color c)
void	fltk::setcolor (Color)
void	fltk::setcolor_alpha (Color, float alpha)
void	fltk::setdrawflags (Flags f)
Path construction
void	fltk::addarc (float x, float y, float w, float h, float a1, float a2)
void	fltk::addchord (const Rectangle &r, float a, float a2)
void	fltk::addcurve (float, float, float, float, float, float, float, float)
void	fltk::addpie (const Rectangle &r, float a, float a2)
void	fltk::addvertex (int x, int y)
void	fltk::addvertex (float x, float y)
void	fltk::addvertices (int n, const int v[][2])
void	fltk::addvertices (int n, const float v[][2])
void	fltk::addvertices_transformed (int n, const float v[][2])
void	fltk::closepath ()
void	fltk::newpath ()
Clipping
void	fltk::clipout (const Rectangle &)
int	fltk::intersect_with_clip (Rectangle &)
bool	fltk::not_clipped (const Rectangle &)
void	fltk::pop_clip ()
void	fltk::push_clip (int X, int Y, int W, int H)
	Same as push_clip(Rectangle(x,y,w,h)) but faster:.
void	fltk::push_clip (const Rectangle &)
void	fltk::push_no_clip ()
Transformation
void	fltk::concat (float, float, float, float, float, float)
void	fltk::load_identity ()
void	fltk::pop_matrix ()
void	fltk::push_matrix ()
void	fltk::rotate (float d)
void	fltk::scale (float x)
void	fltk::scale (float x, float y)
void	fltk::transform (int &x, int &y, int &w, int &h)
void	fltk::transform (const Rectangle &from, Rectangle &to)
void	fltk::transform (int &x, int &y)
void	fltk::transform (float &x, float &y)
void	fltk::transform_distance (float &x, float &y)
void	fltk::translate (int x, int y)
void	fltk::translate (float x, float y)
Shapes and lines
void	fltk::drawline (float x0, float y0, float x1, float y1)
void	fltk::drawline (int x0, int y0, int x1, int y1)
void	fltk::drawpoint (float x, float y)
void	fltk::drawpoint (int x, int y)
void	fltk::fillpath ()
void	fltk::fillrect (const Rectangle &r)
void	fltk::fillrect (int, int, int, int)
void	fltk::fillstrokepath (Color)
void	fltk::strokepath ()
void	fltk::strokerect (const Rectangle &r)
void	fltk::strokerect (int, int, int, int)
Variables
Color	fltk::current_bgcolor_
Color	fltk::current_color_
Flags	fltk::drawflags_
const Style *	fltk::drawstyle_
const char *	fltk::line_dashes_
int	fltk::line_style_
float	fltk::line_width_