synfig-studio/tags/stable/src/gtkmm/renderer_grid.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file renderer_grid.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 */
  21 /* ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include "renderer_grid.h"
  33 #include "workarea.h"
  34 #include <ETL/misc>
  35
  36 #include "general.h"
  37
  38 #endif
  39
  40 /* === U S I N G =========================================================== */
  41
  42 using namespace std;
  43 using namespace etl;
  44 using namespace synfig;
  45 using namespace studio;
  46
  47 /* === M A C R O S ========================================================= */
  48
  49 /* === G L O B A L S ======================================================= */
  50
  51 /* === P R O C E D U R E S ================================================= */
  52
  53 /* === M E T H O D S ======================================================= */
  54
  55 Renderer_Grid::~Renderer_Grid()
  56 {
  57 }
  58
  59 bool
  60 Renderer_Grid::get_enabled_vfunc()const
  61 {
  62         return get_work_area()->grid_status();
  63 }
  64
  65 synfig::Vector
  66 Renderer_Grid::get_grid_size()const
  67 {
  68         return get_work_area()->get_grid_size();
  69 }
  70
  71 void
  72 Renderer_Grid::render_vfunc(
  73         const Glib::RefPtr<Gdk::Drawable>& drawable,
  74         const Gdk::Rectangle& /*expose_area*/
  75 )
  76 {
  77         assert(get_work_area());
  78         if(!get_work_area())
  79                 return;
  80
  81 //      const synfig::RendDesc &rend_desc(get_work_area()->get_canvas()->rend_desc());
  82
  83         const synfig::Vector focus_point(get_work_area()->get_focus_point());
  84
  85 //      std::vector< std::pair<Glib::RefPtr<Gdk::Pixbuf>,int> >& tile_book(get_tile_book());
  86
  87         int drawable_w,drawable_h;
  88         drawable->get_size(drawable_w,drawable_h);
  89
  90         // Calculate the window coordinates of the top-left
  91         // corner of the canvas.
  92 //      const synfig::Vector::value_type
  93 //              x(focus_point[0]/get_pw()+drawable_w/2-get_w()/2),
  94 //              y(focus_point[1]/get_ph()+drawable_h/2-get_h()/2);
  95
  96         /*const synfig::Vector::value_type window_startx(window_tl[0]);
  97         const synfig::Vector::value_type window_endx(window_br[0]);
  98         const synfig::Vector::value_type window_starty(window_tl[1]);
  99         const synfig::Vector::value_type window_endy(window_br[1]);
 100         */
 101 //      const int
 102 //              tile_w(get_work_area()->get_tile_w()),
 103 //              tile_h(get_work_area()->get_tile_h());
 104
 105 //      const int
 106 //              w(get_w()),
 107 //              h(get_h());
 108
 109         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(drawable));
 110
 111         const synfig::Vector grid_size(get_grid_size());
 112
 113         const synfig::Vector::value_type window_startx(get_work_area()->get_window_tl()[0]);
 114         const synfig::Vector::value_type window_endx(get_work_area()->get_window_br()[0]);
 115         const synfig::Vector::value_type window_starty(get_work_area()->get_window_tl()[1]);
 116         const synfig::Vector::value_type window_endy(get_work_area()->get_window_br()[1]);
 117         const float pw(get_pw()),ph(get_ph());
 118
 119         // Draw out the grid
 120         if(grid_size[0]>pw*3.5 && grid_size[1]>ph*3.5)
 121         {
 122                 synfig::Vector::value_type x,y;
 123
 124                 x=floor(window_startx/grid_size[0])*grid_size[0];
 125                 y=floor(window_starty/grid_size[1])*grid_size[1];
 126
 127                 gc->set_function(Gdk::COPY);
 128                 gc->set_rgb_fg_color(Gdk::Color("#9f9f9f"));
 129                 gc->set_line_attributes(1,Gdk::LINE_ON_OFF_DASH,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 130
 131                 if(x<window_endx)
 132                         for(;x<window_endx;x+=grid_size[0])
 133                         {
 134                                 drawable->draw_line(gc,
 135                                         round_to_int((x-window_startx)/pw),
 136                                         0,
 137                                         round_to_int((x-window_startx)/pw),
 138                                         drawable_h
 139                                 );
 140                         }
 141                 else
 142                         for(;x>window_endx;x-=grid_size[0])
 143                         {
 144                                 drawable->draw_line(gc,
 145                                         round_to_int((x-window_startx)/pw),
 146                                         0,
 147                                         round_to_int((x-window_startx)/pw),
 148                                         drawable_h
 149                                 );
 150                         }
 151
 152                 if(y<window_endy)
 153                         for(;y<window_endy;y+=grid_size[1])
 154                         {
 155                                 drawable->draw_line(gc,
 156                                         0,
 157                                         round_to_int((y-window_starty)/ph),
 158                                         drawable_w,
 159                                         round_to_int((y-window_starty)/ph)
 160                                 );
 161                         }
 162                 else
 163                         for(;y>window_endy;y-=grid_size[1])
 164                         {
 165                                 drawable->draw_line(gc,
 166                                         0,
 167                                         round_to_int((y-window_starty)/ph),
 168                                         drawable_w,
 169                                         round_to_int((y-window_starty)/ph)
 170                                 );
 171                         }
 172         }
 173 }