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

   1 /* === S I N F G =========================================================== */
   2 /*!     \file dialog_setup.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id: dialog_setup.cpp,v 1.1.1.1 2005/01/07 03:34:36 darco Exp $
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002 Robert B. Quattlebaum Jr.
   9 **
  10 **      This software and associated documentation
  11 **      are CONFIDENTIAL and PROPRIETARY property of
  12 **      the above-mentioned copyright holder.
  13 **
  14 **      You may not copy, print, publish, or in any
  15 **      other way distribute this software without
  16 **      a prior written agreement with
  17 **      the copyright holder.
  18 **      \endlegal
  19 */
  20 /* ========================================================================= */
  21
  22 /* === H E A D E R S ======================================================= */
  23
  24 #ifdef USING_PCH
  25 #       include "pch.h"
  26 #else
  27 #ifdef HAVE_CONFIG_H
  28 #       include <config.h>
  29 #endif
  30
  31 #include "dialog_setup.h"
  32 #include "app.h"
  33 #include <gtkmm/scale.h>
  34 #include <gtkmm/table.h>
  35 #include <gtkmm/frame.h>
  36 #include <gtkmm/notebook.h>
  37 #include <gtkmm/spinbutton.h>
  38 #include "widget_enum.h"
  39
  40 #include <ETL/stringf>
  41 #include <ETL/misc>
  42 #endif
  43
  44 /* === U S I N G =========================================================== */
  45
  46 using namespace std;
  47 using namespace etl;
  48 using namespace sinfg;
  49 using namespace studio;
  50
  51 /* === M A C R O S ========================================================= */
  52
  53 /* === G L O B A L S ======================================================= */
  54
  55 /* === P R O C E D U R E S ================================================= */
  56
  57 /* === M E T H O D S ======================================================= */
  58
  59 Dialog_Setup::Dialog_Setup():
  60         Dialog(_("SINFG Studio Setup"),false,true),
  61         adj_gamma_r(2.2,0.1,3.0,0.025,0.025,0.025),
  62         adj_gamma_g(2.2,0.1,3.0,0.025,0.025,0.025),
  63         adj_gamma_b(2.2,0.1,3.0,0.025,0.025,0.025),
  64         adj_recent_files(15,1,50,1,1,1),
  65         adj_undo_depth(100,10,5000,1,1,1),
  66         toggle_use_colorspace_gamma(_("Visually Linear Color Selection"))
  67 {
  68         // Setup the buttons
  69
  70         Gtk::Button *ok_button(manage(new class Gtk::Button(Gtk::StockID("gtk-ok"))));
  71         ok_button->show();
  72         add_action_widget(*ok_button,2);
  73         ok_button->signal_clicked().connect(sigc::mem_fun(*this, &Dialog_Setup::on_ok_pressed));
  74
  75         Gtk::Button *apply_button(manage(new class Gtk::Button(Gtk::StockID("gtk-apply"))));
  76         apply_button->show();
  77         add_action_widget(*apply_button,1);
  78         apply_button->signal_clicked().connect(sigc::mem_fun(*this, &Dialog_Setup::on_apply_pressed));
  79
  80         Gtk::Button *cancel_button(manage(new class Gtk::Button(Gtk::StockID("gtk-close"))));
  81         cancel_button->show();
  82         add_action_widget(*cancel_button,0);
  83         cancel_button->signal_clicked().connect(sigc::mem_fun(*this, &Dialog_Setup::hide));
  84
  85
  86         // Notebook
  87         Gtk::Notebook *notebook=manage(new class Gtk::Notebook());
  88         get_vbox()->pack_start(*notebook);
  89
  90
  91         // Gamma
  92         Gtk::Table *gamma_table=manage(new Gtk::Table(2,2,false));
  93         notebook->append_page(*gamma_table,_("Gamma"));
  94         //gamma_frame->add(*gamma_table);
  95
  96         gamma_table->attach(gamma_pattern, 0, 2, 0, 1, Gtk::EXPAND, Gtk::SHRINK|Gtk::FILL, 0, 0);
  97
  98         Gtk::HScale* scale_gamma_r(manage(new Gtk::HScale(adj_gamma_r)));
  99         gamma_table->attach(*manage(new Gtk::Label(_("Red"))), 0, 1, 1, 2, Gtk::SHRINK|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 100         gamma_table->attach(*scale_gamma_r, 1, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 101         adj_gamma_r.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Dialog_Setup::on_gamma_r_change));
 102
 103         Gtk::HScale* scale_gamma_g(manage(new Gtk::HScale(adj_gamma_g)));
 104         gamma_table->attach(*manage(new Gtk::Label(_("Green"))), 0, 1, 2, 3, Gtk::SHRINK|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 105         gamma_table->attach(*scale_gamma_g, 1, 2, 2, 3, Gtk::EXPAND|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 106         adj_gamma_g.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Dialog_Setup::on_gamma_g_change));
 107
 108         Gtk::HScale* scale_gamma_b(manage(new Gtk::HScale(adj_gamma_b)));
 109         gamma_table->attach(*manage(new Gtk::Label(_("Blue"))), 0, 1, 3, 4, Gtk::SHRINK|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 110         gamma_table->attach(*scale_gamma_b, 1, 2, 3, 4, Gtk::EXPAND|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 111         adj_gamma_b.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Dialog_Setup::on_gamma_b_change));
 112
 113         gamma_table->attach(*manage(new Gtk::Label(_("Black Level"))), 0, 1, 4, 5, Gtk::SHRINK|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 114         gamma_table->attach(black_level_selector, 1, 2, 4, 5, Gtk::EXPAND|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 115         black_level_selector.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Dialog_Setup::on_black_level_change));
 116
 117         //gamma_table->attach(*manage(new Gtk::Label(_("Red-Blue Level"))), 0, 1, 5, 6, Gtk::SHRINK|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 118         //gamma_table->attach(red_blue_level_selector, 1, 2, 5, 6, Gtk::EXPAND|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 119         //red_blue_level_selector.signal_value_changed().connect(sigc::mem_fun(*this,&studio::Dialog_Setup::on_red_blue_level_change));
 120
 121
 122         // Misc
 123         Gtk::Table *misc_table=manage(new Gtk::Table(2,2,false));
 124         notebook->append_page(*misc_table,_("Misc."));
 125
 126         // Misc - Timestamp
 127         timestamp_menu=manage(new class Gtk::Menu());
 128         misc_table->attach(*manage(new Gtk::Label(_("Timestamp"))), 0, 1, 0, 1, Gtk::SHRINK|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 129         misc_table->attach(timestamp_optionmenu, 1, 2, 0, 1, Gtk::EXPAND|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 130
 131 #define ADD_TIMESTAMP(desc,x)   \
 132         timestamp_menu->items().push_back(      \
 133                 Gtk::Menu_Helpers::MenuElem(    \
 134                         desc,   \
 135                         sigc::bind(     \
 136                                 sigc::mem_fun(  \
 137                                         *this,  \
 138                                         &studio::Dialog_Setup::set_time_format  \
 139                                 ),      \
 140                                 x       \
 141                         )       \
 142                 )       \
 143         );
 144         ADD_TIMESTAMP("HH:MM:SS.FF",Time::FORMAT_VIDEO);
 145         ADD_TIMESTAMP("(HHh MMm SSs) FFf",Time::FORMAT_NORMAL);
 146         ADD_TIMESTAMP("(HHhMMmSSs)FFf",Time::FORMAT_NORMAL|Time::FORMAT_NOSPACES);
 147         ADD_TIMESTAMP("HHh MMm SSs FFf",Time::FORMAT_NORMAL|Time::FORMAT_FULL);
 148         ADD_TIMESTAMP("HHhMMmSSsFFf",Time::FORMAT_NORMAL|Time::FORMAT_NOSPACES|Time::FORMAT_FULL);
 149
 150         timestamp_optionmenu.set_menu(*timestamp_menu);
 151
 152 #undef ADD_TIMESTAMP
 153
 154         {
 155                 ParamDesc param_desc;
 156                 param_desc
 157                         .set_hint("enum")
 158                         .add_enum_value(Distance::SYSTEM_UNITS,"u",_("Units"))
 159                         .add_enum_value(Distance::SYSTEM_PIXELS,"px",_("Pixels"))
 160                         .add_enum_value(Distance::SYSTEM_POINTS,"pt",_("Points"))
 161                         .add_enum_value(Distance::SYSTEM_INCHES,"in",_("Inches"))
 162                         .add_enum_value(Distance::SYSTEM_METERS,"m",_("Meters"))
 163                         .add_enum_value(Distance::SYSTEM_CENTIMETERS,"cm",_("Centimeters"))
 164                         .add_enum_value(Distance::SYSTEM_MILLIMETERS,"mm",_("Millimeters"));
 165
 166                 widget_enum=manage(new Widget_Enum());
 167                 widget_enum->set_param_desc(param_desc);
 168
 169                 misc_table->attach(*manage(new Gtk::Label(_("Unit System"))), 0, 1, 3, 4, Gtk::SHRINK|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 170                 misc_table->attach(*widget_enum, 1, 2, 3, 4, Gtk::EXPAND|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 171         }
 172
 173         // Misc - recent files
 174         Gtk::SpinButton* recent_files_spinbutton(manage(new Gtk::SpinButton(adj_recent_files,1,0)));
 175         misc_table->attach(*manage(new Gtk::Label(_("Recent Files"))), 0, 1, 1, 2, Gtk::SHRINK|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 176         misc_table->attach(*recent_files_spinbutton, 1, 2, 1, 2, Gtk::EXPAND|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 177
 178         // Misc - use_colorspace_gamma
 179         misc_table->attach(toggle_use_colorspace_gamma, 0, 2, 2, 3, Gtk::EXPAND|Gtk::FILL, Gtk::SHRINK|Gtk::FILL, 0, 0);
 180
 181         show_all_children();
 182 }
 183
 184 Dialog_Setup::~Dialog_Setup()
 185 {
 186 }
 187
 188 void
 189 Dialog_Setup::on_ok_pressed()
 190 {
 191     on_apply_pressed();
 192         hide();
 193 }
 194
 195 void
 196 Dialog_Setup::on_apply_pressed()
 197 {
 198         App::gamma.set_all(1.0/adj_gamma_r.get_value(),1.0/adj_gamma_g.get_value(),1.0/adj_gamma_b.get_value(),black_level_selector.get_value(),red_blue_level_selector.get_value());
 199
 200         App::set_max_recent_files((int)adj_recent_files.get_value());
 201
 202         // Set the time format
 203         App::set_time_format(get_time_format());
 204
 205         // Set the use_colorspace_gamma flag
 206         App::use_colorspace_gamma=toggle_use_colorspace_gamma.get_active();
 207
 208         App::distance_system=Distance::System(widget_enum->get_value());
 209
 210         App::save_settings();
 211 }
 212
 213 void
 214 Dialog_Setup::on_gamma_r_change()
 215 {
 216         gamma_pattern.set_gamma_r(1.0/adj_gamma_r.get_value());
 217         gamma_pattern.refresh();
 218         gamma_pattern.queue_draw();
 219 }
 220
 221 void
 222 Dialog_Setup::on_gamma_g_change()
 223 {
 224         gamma_pattern.set_gamma_g(1.0/adj_gamma_g.get_value());
 225         gamma_pattern.refresh();
 226         gamma_pattern.queue_draw();
 227 }
 228
 229 void
 230 Dialog_Setup::on_gamma_b_change()
 231 {
 232         gamma_pattern.set_gamma_b(1.0/adj_gamma_b.get_value());
 233         gamma_pattern.refresh();
 234         gamma_pattern.queue_draw();
 235 }
 236
 237 void
 238 Dialog_Setup::on_black_level_change()
 239 {
 240         gamma_pattern.set_black_level(black_level_selector.get_value());
 241         gamma_pattern.refresh();
 242         gamma_pattern.queue_draw();
 243 }
 244
 245 void
 246 Dialog_Setup::on_red_blue_level_change()
 247 {
 248         gamma_pattern.set_red_blue_level(red_blue_level_selector.get_value());
 249         gamma_pattern.refresh();
 250         gamma_pattern.queue_draw();
 251 }
 252
 253
 254 void
 255 Dialog_Setup::refresh()
 256 {
 257         adj_gamma_r.set_value(1.0/App::gamma.get_gamma_r());
 258         adj_gamma_g.set_value(1.0/App::gamma.get_gamma_g());
 259         adj_gamma_b.set_value(1.0/App::gamma.get_gamma_b());
 260         black_level_selector.set_value(App::gamma.get_black_level());
 261         red_blue_level_selector.set_value(App::gamma.get_red_blue_level());
 262
 263         // Refresh the temporary gamma
 264         gamma_pattern.set_gamma_r(1.0/adj_gamma_r.get_value());
 265         gamma_pattern.set_gamma_g(1.0/adj_gamma_g.get_value());
 266         gamma_pattern.set_gamma_b(1.0/adj_gamma_b.get_value());
 267         gamma_pattern.set_black_level(black_level_selector.get_value());
 268         gamma_pattern.set_red_blue_level(red_blue_level_selector.get_value());
 269         gamma_pattern.refresh();
 270
 271         adj_recent_files.set_value(App::get_max_recent_files());
 272
 273         // Refresh the time format
 274         set_time_format(App::get_time_format());
 275
 276         widget_enum->set_value(App::distance_system);
 277
 278         // Refresh the status of the use_colorspace_gamma flag
 279         toggle_use_colorspace_gamma.set_active(App::use_colorspace_gamma);
 280
 281 }
 282
 283 GammaPattern::GammaPattern():
 284         tile_w(80),
 285         tile_h(80)
 286 {
 287         set_size_request(tile_w*4,tile_h*3);
 288         signal_expose_event().connect(sigc::mem_fun(*this, &studio::GammaPattern::redraw));
 289 }
 290
 291 GammaPattern::~GammaPattern()
 292 {
 293 }
 294
 295 void
 296 GammaPattern::refresh()
 297 {
 298         black[0].set_rgb_p(
 299                 r_F32_to_F32(0.0),
 300                 g_F32_to_F32(0.0),
 301                 b_F32_to_F32(0.0)
 302         );
 303         white[0].set_rgb_p(
 304                 r_F32_to_F32(1.0),
 305                 g_F32_to_F32(1.0),
 306                 b_F32_to_F32(1.0)
 307         );
 308         gray50[0].set_rgb_p(
 309                 r_F32_to_F32(0.5),
 310                 g_F32_to_F32(0.5),
 311                 b_F32_to_F32(0.5)
 312         );
 313         gray25[0].set_rgb_p(
 314                 r_F32_to_F32(0.25),
 315                 g_F32_to_F32(0.25),
 316                 b_F32_to_F32(0.25)
 317         );
 318
 319         // Reds
 320         black[1].set_rgb(black[0].get_red(),0,0);
 321         gray25[1].set_rgb(gray25[0].get_red(),0,0);
 322         gray50[1].set_rgb(gray50[0].get_red(),0,0);
 323         white[1].set_rgb(white[0].get_red(),0,0);
 324
 325         // Greens
 326         black[2].set_rgb(0,black[0].get_green(),0);
 327         gray25[2].set_rgb(0,gray25[0].get_green(),0);
 328         gray50[2].set_rgb(0,gray50[0].get_green(),0);
 329         white[2].set_rgb(0,white[0].get_green(),0);
 330
 331         // blues
 332         black[3].set_rgb(0,0,black[0].get_blue());
 333         gray25[3].set_rgb(0,0,gray25[0].get_blue());
 334         gray50[3].set_rgb(0,0,gray50[0].get_blue());
 335         white[3].set_rgb(0,0,white[0].get_blue());
 336 }
 337
 338 bool
 339 GammaPattern::redraw(GdkEventExpose*bleh)
 340 {
 341         static const char hlines[] = { 3, 0 };
 342
 343         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(get_window()));
 344
 345         int i;
 346         Gdk::Color trueblack("#000000");
 347
 348         // 50% Pattern
 349         for(i=0;i<4;i++)
 350         {
 351                 gc->set_rgb_fg_color(black[i]);
 352                 get_window()->draw_rectangle(gc, true, i*tile_w, 0, tile_w, tile_h);
 353
 354                 gc->set_stipple(Gdk::Bitmap::create(hlines,2,2));
 355                 gc->set_fill(Gdk::STIPPLED);
 356                 gc->set_rgb_fg_color(white[i]);
 357                 get_window()->draw_rectangle(gc, true, i*tile_w, 0, tile_w, tile_h);
 358
 359                 gc->set_fill(Gdk::SOLID);
 360                 gc->set_rgb_fg_color(gray50[i]);
 361
 362                 get_window()->draw_rectangle(gc, true, i*tile_w+tile_w/4, tile_h/4, tile_w-tile_w/2, tile_h-tile_h/2);
 363         }
 364
 365         // 25% Pattern
 366         for(i=0;i<4;i++)
 367         {
 368                 gc->set_rgb_fg_color(black[i]);
 369                 get_window()->draw_rectangle(gc, true, i*tile_w, tile_h, tile_w, tile_h);
 370
 371                 gc->set_stipple(Gdk::Bitmap::create(hlines,2,2));
 372                 gc->set_fill(Gdk::STIPPLED);
 373                 gc->set_rgb_fg_color(gray50[i]);
 374                 get_window()->draw_rectangle(gc, true, i*tile_w, tile_h, tile_w, tile_h);
 375
 376                 gc->set_fill(Gdk::SOLID);
 377                 gc->set_rgb_fg_color(gray25[i]);
 378
 379                 get_window()->draw_rectangle(gc, true, i*tile_w+tile_w/4, tile_h+tile_h/4, tile_w-tile_w/2, tile_h-tile_h/2);
 380         }
 381
 382         // Black-level Pattern
 383         gc->set_rgb_fg_color(trueblack);
 384         get_window()->draw_rectangle(gc, true, 0, tile_h*2, tile_w*4, tile_h);
 385         gc->set_fill(Gdk::SOLID);
 386         for(i=0;i<4;i++)
 387         {
 388                 gc->set_rgb_fg_color(black[i]);
 389
 390                 get_window()->draw_rectangle(gc, true, i*tile_w+tile_w/4, tile_h*2+tile_h/4, tile_w-tile_w/2, tile_h-tile_h/2);
 391         }
 392
 393         return true;
 394 }
 395
 396
 397 BlackLevelSelector::BlackLevelSelector()
 398 {
 399         set_size_request(-1,24);
 400         signal_expose_event().connect(sigc::mem_fun(*this, &studio::BlackLevelSelector::redraw));
 401
 402         add_events(Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK);
 403         add_events(Gdk::BUTTON1_MOTION_MASK);
 404         add_events(Gdk::BUTTON1_MOTION_MASK);
 405 }
 406
 407 BlackLevelSelector::~BlackLevelSelector()
 408 {
 409 }
 410
 411 bool
 412 BlackLevelSelector::redraw(GdkEventExpose*bleh)
 413 {
 414         const int w(get_width()),h(get_height());
 415
 416         Gdk::Color color;
 417
 418         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(get_window()));
 419
 420         int i;
 421
 422         // Draw the gradient
 423         for(i=0;i<w;i++)
 424         {
 425                 color.set_rgb(i*65536/w,i*65536/w,i*65536/w);
 426
 427                 gc->set_rgb_fg_color(color);
 428                 get_window()->draw_rectangle(gc, true, i, 0, 1, h);
 429         }
 430
 431         // Draw a frame
 432         gc->set_rgb_fg_color(Gdk::Color("#000000"));
 433         get_window()->draw_rectangle(gc, false, 0, 0, w-1, h-1);
 434
 435         // Draw the position of the current value
 436         i=(int)(level*w+0.5);
 437         gc->set_rgb_fg_color(Gdk::Color("#ff0000"));
 438         get_window()->draw_rectangle(gc, true, i, 1, 1, h-1);
 439
 440         // Print out the value
 441         Glib::RefPtr<Pango::Layout> layout(Pango::Layout::create(get_pango_context()));
 442         layout->set_text(etl::strprintf("%0.01f%%",level*100.0f));
 443         layout->set_alignment(Pango::ALIGN_CENTER);
 444         gc->set_rgb_fg_color(Gdk::Color("#a00000"));
 445         get_window()->draw_layout(gc, w/2, 4, layout);
 446
 447         return true;
 448 }
 449
 450
 451
 452 bool
 453 BlackLevelSelector::on_event(GdkEvent *event)
 454 {
 455         int x(round_to_int(event->button.x));
 456         //int y(round_to_int(event->button.y));
 457
 458     switch(event->type)
 459     {
 460         case GDK_MOTION_NOTIFY:
 461                 level=(float)x/(float)get_width();
 462                 if(level<0.0f)level=0.0f;
 463                 if(level>1.0f)level=1.0f;
 464                 signal_value_changed_();
 465                 queue_draw();
 466                 return true;
 467                 break;
 468         case GDK_BUTTON_PRESS:
 469         case GDK_BUTTON_RELEASE:
 470                 if(event->button.button==1)
 471                 {
 472                         level=(float)x/(float)get_width();
 473                         if(level<0.0f)level=0.0f;
 474                         if(level>1.0f)level=1.0f;
 475                         signal_value_changed_();
 476                         queue_draw();
 477                         return true;
 478                 }
 479                 break;
 480         default:
 481                 break;
 482         }
 483
 484         return false;
 485 }
 486
 487
 488 void
 489 Dialog_Setup::set_time_format(Time::Format x)
 490 {
 491         time_format=x;
 492         if(x<=Time::FORMAT_VIDEO)
 493                 timestamp_optionmenu.set_history(0);
 494         else
 495         {
 496                 if(x==(Time::FORMAT_NOSPACES|Time::FORMAT_FULL))
 497                         timestamp_optionmenu.set_history(4);
 498                 else if(x==(Time::FORMAT_FULL))
 499                         timestamp_optionmenu.set_history(3);
 500                 else if(x==(Time::FORMAT_NOSPACES))
 501                         timestamp_optionmenu.set_history(2);
 502                 else
 503                         timestamp_optionmenu.set_history(1);
 504         }
 505 }
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522 RedBlueLevelSelector::RedBlueLevelSelector()
 523 {
 524         set_size_request(-1,24);
 525         signal_expose_event().connect(sigc::mem_fun(*this, &studio::RedBlueLevelSelector::redraw));
 526
 527         add_events(Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK);
 528         add_events(Gdk::BUTTON1_MOTION_MASK);
 529         add_events(Gdk::BUTTON1_MOTION_MASK);
 530 }
 531
 532 RedBlueLevelSelector::~RedBlueLevelSelector()
 533 {
 534 }
 535
 536 bool
 537 RedBlueLevelSelector::redraw(GdkEventExpose*bleh)
 538 {
 539         const int w(get_width()),h(get_height());
 540
 541         Gdk::Color color;
 542
 543         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(get_window()));
 544
 545         int i;
 546
 547         // Draw the gradient
 548         for(i=0;i<w;i++)
 549         {
 550                 float red_blue(((float(i)/float(w)+0.5f)-1.0f)/2.0f+1.0f);
 551                 float blue_red(2.0f-(red_blue));
 552                 if(red_blue>1.0f)red_blue=1.0f;
 553                 if(blue_red>1.0f)blue_red=1.0f;
 554
 555                 color.set_rgb(
 556                         round_to_int(min(red_blue,1.0f)*65535),
 557                         round_to_int(sqrt(min(red_blue,blue_red))*65535),
 558                         round_to_int(min(blue_red,1.0f)*65535)
 559                 );
 560
 561                 gc->set_rgb_fg_color(color);
 562                 get_window()->draw_rectangle(gc, true, i, 0, 1, h);
 563         }
 564
 565         // Draw a frame
 566         gc->set_rgb_fg_color(Gdk::Color("#000000"));
 567         get_window()->draw_rectangle(gc, false, 0, 0, w-1, h-1);
 568
 569         // Draw the position of the current value
 570         i=(int)(((level-1.0f)*2.0f+1.0f-0.5f)*w+0.5);
 571         gc->set_rgb_fg_color(Gdk::Color("#00ff00"));
 572         get_window()->draw_rectangle(gc, true, i, 1, 1, h-1);
 573
 574         // Print out the value
 575         Glib::RefPtr<Pango::Layout> layout(Pango::Layout::create(get_pango_context()));
 576         layout->set_text(etl::strprintf("%0.02f",level));
 577         layout->set_alignment(Pango::ALIGN_CENTER);
 578         gc->set_rgb_fg_color(Gdk::Color("#a00000"));
 579         get_window()->draw_layout(gc, w/2, 4, layout);
 580
 581         return true;
 582 }
 583
 584
 585
 586 bool
 587 RedBlueLevelSelector::on_event(GdkEvent *event)
 588 {
 589         int x(round_to_int(event->button.x));
 590         //int y(round_to_int(event->button.y));
 591
 592     switch(event->type)
 593     {
 594         case GDK_MOTION_NOTIFY:
 595                 level=(((float)(x)/(float)get_width()+0.5)-1.0f)/2.0f+1.0f;
 596                 if(level<0.5f)level=0.5f;
 597                 if(level>1.5f)level=1.5f;
 598                 signal_value_changed_();
 599                 queue_draw();
 600                 return true;
 601                 break;
 602         case GDK_BUTTON_PRESS:
 603         case GDK_BUTTON_RELEASE:
 604                 if(event->button.button==1)
 605                 {
 606                         level=(((float)(x)/(float)get_width()+0.5)-1.0f)/2.0f+1.0f;
 607                         if(level<0.5f)level=0.5f;
 608                         if(level>1.5f)level=1.5f;
 609                         signal_value_changed_();
 610                         queue_draw();
 611                         return true;
 612                 }
 613                 break;
 614         default:
 615                 break;
 616         }
 617
 618         return false;
 619 }