src/wx/closed_captions_dialog.cc

   1 /*
   2     Copyright (C) 2018 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "closed_captions_dialog.h"
  22 #include "lib/string_text.h"
  23 #include <boost/bind.hpp>
  24
  25 using std::list;
  26 using std::cout;
  27 using std::make_pair;
  28 using boost::shared_ptr;
  29 using boost::weak_ptr;
  30
  31 int const ClosedCaptionsDialog::_num_lines = 3;
  32 int const ClosedCaptionsDialog::_num_chars_per_line = 30;
  33
  34 ClosedCaptionsDialog::ClosedCaptionsDialog (wxWindow* parent)
  35         : wxDialog (parent, wxID_ANY, _("Closed captions"), wxDefaultPosition, wxDefaultSize,
  36 #ifdef DCPOMATIC_OSX
  37                 /* I can't get wxFRAME_FLOAT_ON_PARENT to work on OS X, and although wxSTAY_ON_TOP keeps
  38                    the window above all others (and not just our own) it's better than nothing for now.
  39                 */
  40                 wxDEFAULT_FRAME_STYLE | wxRESIZE_BORDER | wxFULL_REPAINT_ON_RESIZE | wxSTAY_ON_TOP
  41 #else
  42                 wxDEFAULT_FRAME_STYLE | wxRESIZE_BORDER | wxFULL_REPAINT_ON_RESIZE | wxFRAME_FLOAT_ON_PARENT
  43 #endif
  44                 )
  45
  46 {
  47         _lines.resize (_num_lines);
  48         Bind (wxEVT_PAINT, boost::bind (&ClosedCaptionsDialog::paint, this));
  49 }
  50
  51 void
  52 ClosedCaptionsDialog::paint ()
  53 {
  54         wxPaintDC dc (this);
  55         dc.SetBackground (*wxBLACK_BRUSH);
  56         dc.Clear ();
  57         dc.SetTextForeground (*wxWHITE);
  58
  59         /* Choose a font which fits vertically */
  60         int const line_height = dc.GetSize().GetHeight() / _num_lines;
  61         wxFont font (*wxNORMAL_FONT);
  62         font.SetPixelSize (wxSize (0, line_height * 0.8));
  63         dc.SetFont (font);
  64
  65         for (int i = 0; i < _num_lines; ++i) {
  66                 wxString const good = _lines[i].Left (_num_chars_per_line);
  67                 dc.DrawText (good, 8, line_height * i);
  68                 if (_lines[i].Length() > _num_chars_per_line) {
  69                         wxString const bad = _lines[i].Right (_lines[i].Length() - _num_chars_per_line);
  70                         wxSize size = dc.GetTextExtent (good);
  71                         dc.SetTextForeground (*wxRED);
  72                         dc.DrawText (bad, 8 + size.GetWidth(), line_height * i);
  73                         dc.SetTextForeground (*wxWHITE);
  74                 }
  75         }
  76 }
  77
  78 class ClosedCaptionSorter
  79 {
  80 public:
  81         bool operator() (StringText const & a, StringText const & b)
  82         {
  83                 return from_top(a) < from_top(b);
  84         }
  85
  86 private:
  87         float from_top (StringText const & c) const
  88         {
  89                 switch (c.v_align()) {
  90                 case dcp::VALIGN_TOP:
  91                         return c.v_position();
  92                 case dcp::VALIGN_CENTER:
  93                         return c.v_position() + 0.5;
  94                 case dcp::VALIGN_BOTTOM:
  95                         return 1.0 - c.v_position();
  96                 }
  97                 DCPOMATIC_ASSERT (false);
  98                 return 0;
  99         }
 100 };
 101
 102 void
 103 ClosedCaptionsDialog::update (DCPTime time)
 104 {
 105         shared_ptr<Player> player = _player.lock ();
 106         DCPOMATIC_ASSERT (player);
 107         list<StringText> to_show;
 108         BOOST_FOREACH (PlayerText i, player->closed_captions_for_frame(time)) {
 109                 BOOST_FOREACH (StringText j, i.text) {
 110                         to_show.push_back (j);
 111                 }
 112         }
 113
 114         for (int j = 0; j < _num_lines; ++j) {
 115                 _lines[j] = "";
 116         }
 117
 118         to_show.sort (ClosedCaptionSorter());
 119
 120         list<StringText>::const_iterator j = to_show.begin();
 121         int k = 0;
 122         while (j != to_show.end() && k < _num_lines) {
 123                 _lines[k] = j->text();
 124                 ++j;
 125                 ++k;
 126         }
 127
 128         Refresh ();
 129 }
 130
 131 void
 132 ClosedCaptionsDialog::clear ()
 133 {
 134         Refresh ();
 135 }
 136
 137 void
 138 ClosedCaptionsDialog::set_player (weak_ptr<Player> player)
 139 {
 140         _player = player;
 141 }