Allow PasteCanvas layers with unset canvas parameters to be exported.
[synfig.git] / synfig-studio / trunk / 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 }