/* === S Y N F I G ========================================================= */
/*! \file renderer_grid.cpp
** \brief Template File
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2011 Nikita Kitaev
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
** \endlegal
*/
/* ========================================================================= */
/* === H E A D E R S ======================================================= */
#ifdef USING_PCH
# include "pch.h"
#else
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <synfig/general.h>
#include "renderer_grid.h"
#include "workarea.h"
#include <ETL/misc>
#include <gui/localization.h>
#endif
/* === U S I N G =========================================================== */
using namespace std;
using namespace etl;
using namespace synfig;
using namespace studio;
/* === M A C R O S ========================================================= */
/* === G L O B A L S ======================================================= */
/* === P R O C E D U R E S ================================================= */
/* === M E T H O D S ======================================================= */
Renderer_Grid::~Renderer_Grid()
{
}
bool
Renderer_Grid::get_enabled_vfunc()const
{
return get_work_area()->grid_status();
}
synfig::Vector
Renderer_Grid::get_grid_size()const
{
return get_work_area()->get_grid_size();
}
void
Renderer_Grid::render_vfunc(
const Glib::RefPtr<Gdk::Window>& drawable,
const Gdk::Rectangle& /*expose_area*/
)
{
assert(get_work_area());
if(!get_work_area())
return;
Cairo::RefPtr<Cairo::Context> cr = drawable->create_cairo_context();
int drawable_w = drawable->get_width();
int drawable_h = drawable->get_height();
synfig::Vector grid_size(get_grid_size());
if(grid_size[0] < 0) grid_size[0] = -grid_size[0];
if(grid_size[1] < 0) grid_size[1] = -grid_size[1];
const synfig::Vector::value_type window_startx(get_work_area()->get_window_tl()[0]);
const synfig::Vector::value_type window_endx(get_work_area()->get_window_br()[0]);
const synfig::Vector::value_type window_starty(get_work_area()->get_window_tl()[1]);
const synfig::Vector::value_type window_endy(get_work_area()->get_window_br()[1]);
const float pw(get_pw()),ph(get_ph());
synfig::Color grid_color(get_work_area()->get_grid_color());
// Draw out the grid
if(grid_size[0]>pw*3.5 && grid_size[1]>ph*3.5)
{
synfig::Vector::value_type x,y;
x=floor(window_startx/grid_size[0])*grid_size[0];
y=floor(window_starty/grid_size[1])*grid_size[1];
cr->save();
cr->set_line_cap(Cairo::LINE_CAP_BUTT);
cr->set_line_join(Cairo::LINE_JOIN_MITER);
cr->set_antialias(Cairo::ANTIALIAS_NONE);
cr->set_line_width(1.0);
cr->set_source_rgb(grid_color.get_r(),grid_color.get_g(),grid_color.get_b());
std::valarray<double> dashes(2);
dashes[0]=4.0;
dashes[1]=4.0;
cr->set_dash(dashes, 0);
if(x<window_endx)
for(;x<window_endx;x+=grid_size[0])
{
cr->move_to(
round_to_int((x-window_startx)/pw),
0
);
cr->line_to(
round_to_int((x-window_startx)/pw),
drawable_h
);
cr->stroke();
}
else
for(;x>window_endx;x-=grid_size[0])
{
cr->move_to(
round_to_int((x-window_startx)/pw),
0
);
cr->line_to(
round_to_int((x-window_startx)/pw),
drawable_h
);
cr->stroke();
}
if(y<window_endy)
for(;y<window_endy;y+=grid_size[1])
{
cr->move_to(
0,
round_to_int((y-window_starty)/ph)
);
cr->line_to(
drawable_w,
round_to_int((y-window_starty)/ph)
);
cr->stroke();
}
else
for(;y>window_endy;y-=grid_size[1])
{
cr->move_to(
0,
round_to_int((y-window_starty)/ph)
);
cr->line_to(
drawable_w,
round_to_int((y-window_starty)/ph)
);
cr->stroke();
}
cr->restore();
}
}