git.maemo.org Git - led-pattern-ed/blob - src/led-pattern-view.vala

   1 /* This file is part of LED Pattern Editor.
   2  *
   3  * Copyright (C) 2010 Philipp Zabel
   4  *
   5  * LED Pattern Editor is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * LED Pattern Editor is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with LED Pattern Editor. If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 class LedPatternView : Gtk.DrawingArea {
  20         public LedPatternRX51 pattern;
  21         public double duration;
  22
  23         public LedPatternView (LedPatternRX51? _pattern = null) {
  24                 pattern = _pattern;
  25                 if (pattern != null)
  26                         pattern.changed.connect (update);
  27                 update_duration ();
  28         }
  29
  30         public void update_duration () {
  31                 duration = 1.0;
  32                 if (pattern != null) {
  33                         while (pattern.duration > 1000 * duration) {
  34                                 duration += 1.0;
  35                         }
  36                 }
  37         }
  38
  39         public override bool expose_event (Gdk.EventExpose event) {
  40
  41                 update_duration ();
  42
  43                 var ctx = Gdk.cairo_create (window);
  44                 int height = allocation.height;
  45                 int width = allocation.width;
  46                 double pps = width / duration; // pixel per second
  47
  48                 ctx.rectangle (event.area.x, event.area.y, event.area.width, event.area.height);
  49                 ctx.clip ();
  50
  51                 ctx.set_source_rgb (0, 0, 0);
  52                 ctx.set_line_width (1.0);
  53
  54                 ctx.set_line_join (Cairo.LineJoin.ROUND);
  55
  56                 ctx.new_path ();
  57                 ctx.move_to (0, 0);
  58                 ctx.line_to (width, 0);
  59                 ctx.line_to (width, height);
  60                 ctx.line_to (0, height);
  61                 ctx.close_path ();
  62                 ctx.fill ();
  63
  64                 ctx.set_source_rgb (0.33, 0.33, 0.33);
  65                 ctx.new_path ();
  66
  67                 // 0%, 50%, 100%
  68                 ctx.move_to (0.5, 0.5);
  69                 ctx.line_to (width - 0.5, 0.5);
  70
  71                 ctx.move_to (0.5, height / 2 - 0.5);
  72                 ctx.line_to (width - 0.5, height / 2 - 0.5);
  73
  74                 ctx.move_to (0.5, height - 0.5);
  75                 ctx.line_to (width - 0.5, height - 0.5);
  76
  77                 // 0s, 1s, 2s, 3s, 4s
  78                 for (double time = 0; time <= duration; time += 1.0) {
  79                         ctx.move_to (time * pps + 0.5, 0.5);
  80                         ctx.line_to (time * pps + 0.5, 139.5);
  81                 }
  82                 ctx.stroke ();
  83
  84                 if (pattern != null) {
  85                         ctx.new_path ();
  86
  87                         if (pattern.led_map == "r") {
  88                                 ctx.set_source_rgb (1, 0, 0);
  89                         } else if (pattern.led_map == "g") {
  90                                 ctx.set_source_rgb (0, 1, 0);
  91                         } else if (pattern.led_map == "b") {
  92                                 ctx.set_source_rgb (0, 0, 1);
  93                         } else if (pattern.led_map == "rg") {
  94                                 ctx.set_source_rgb (1, 1, 0);
  95                         } else if (pattern.led_map == "rb") {
  96                                 ctx.set_source_rgb (1, 0, 1);
  97                         } else if (pattern.led_map == "gb") {
  98                                 ctx.set_source_rgb (0, 1, 1);
  99                         } else if (pattern.led_map == "rgb") {
 100                                 ctx.set_source_rgb (1, 1, 1);
 101                         } else {
 102                                 ctx.set_source_rgb (0.75, 0.75, 0.75);
 103                         }
 104                         ctx.set_line_width (3.0);
 105
 106                         double x = 0, y = 0;
 107                         foreach (LedCommand command in pattern.engine1) {
 108                                 x = command.time * pps/1000.0;
 109                                 y = (255 - command.level) * (height - 1)/255.0;
 110                                 switch (command.type) {
 111                                 case CommandType.RAMP_WAIT:
 112                                         x += command.duration * pps/1000.0;
 113                                         y -= command.steps * (height - 1)/255.0;
 114                                         if (y < 0)
 115                                                 y = 0;
 116                                         if (y > (height - 1))
 117                                                 y = height - 1;
 118                                         ctx.line_to (x, y);
 119                                         break;
 120                                 default:
 121                                         ctx.line_to (x, y);
 122                                         break;
 123                                 }
 124                         }
 125                         ctx.stroke ();
 126
 127                         if (pattern.led_map == "r") {
 128                                 ctx.set_source_rgb (0.75, 0, 0);
 129                         } else if (pattern.led_map == "g") {
 130                                 ctx.set_source_rgb (0, 0.75, 0);
 131                         } else if (pattern.led_map == "b") {
 132                                 ctx.set_source_rgb (0, 0, 0.75);
 133                         } else if (pattern.led_map == "rg") {
 134                                 ctx.set_source_rgb (0.75, 0.75, 0);
 135                         } else if (pattern.led_map == "rb") {
 136                                 ctx.set_source_rgb (0.75, 0, 0.75);
 137                         } else if (pattern.led_map == "gb") {
 138                                 ctx.set_source_rgb (0, 0.75, 0.75);
 139                         } else if (pattern.led_map == "rgb") {
 140                                 ctx.set_source_rgb (0.75, 0.75, 0.75);
 141                         } else {
 142                                 ctx.set_source_rgb (0.66, 0.66, 0.66);
 143                         }
 144                         ctx.set_line_width (1.0);
 145
 146                         CommandType type = CommandType.UNKNOWN;
 147                         foreach (LedCommandRX51 command in pattern.engine1) {
 148                                 if (command.type == CommandType.STOP ||
 149                                     command.type == CommandType.REPEAT) {
 150                                         type = command.type;
 151                                         break;
 152                                 }
 153                         }
 154
 155                         if (type == CommandType.STOP) {
 156                                 ctx.new_path ();
 157
 158                                 ctx.move_to (x, y);
 159                                 ctx.line_to (width - 0.5, y);
 160
 161                                 ctx.stroke ();
 162                         }
 163                         if (type == CommandType.REPEAT && pattern.duration > 0.0) {
 164                                 ctx.new_path ();
 165
 166                                 for (double offset = pattern.duration; (offset * pps/1000.0) <= width; offset += pattern.duration) {
 167                                         ctx.move_to (x, y);
 168                                         foreach (LedCommand command in pattern.engine1) {
 169                                                 x = (command.time + offset) * pps/1000.0;
 170                                                 y = (255 - command.level) * (height - 1)/255.0;
 171                                                 if (x >= width)
 172                                                         break;
 173                                                 switch (command.type) {
 174                                                 case CommandType.RAMP_WAIT:
 175                                                         x += command.duration * pps/1000.0;
 176                                                         y -= command.steps * (height - 1)/255.0;
 177                                                         if (y < 0)
 178                                                                 y = 0;
 179                                                         if (y > (height - 1))
 180                                                                 y = height - 1;
 181                                                         ctx.line_to (x, y);
 182                                                         break;
 183                                                 default:
 184                                                         ctx.line_to (x, y);
 185                                                         break;
 186                                                 }
 187                                         }
 188                                 }
 189
 190                                 ctx.stroke ();
 191                         }
 192                         if (type == CommandType.REPEAT && pattern.duration == 0.0) {
 193                                 ctx.new_path ();
 194
 195
 196                                 ctx.move_to (x, y);
 197                                 ctx.line_to (width - 0.5, y);
 198
 199                                 ctx.stroke ();
 200                         }
 201                 }
 202                 return true;
 203         }
 204
 205         public void update () {
 206                 unowned Gdk.Region region = window.get_clip_region ();
 207
 208                 // redraw the cairo canvas completely by exposing it
 209                 window.invalidate_region (region, true);
 210                 window.process_updates (true);
 211         }
 212 }