synfig-studio/trunk/src/gtkmm/widget_timeslider.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file widget_timeslider.cpp
   3 **      \brief Time Slider Widget Implementation File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2004 Adrian Bentley
   9 **      Copyright (c) 2007 Chris Moore
  10 **
  11 **      This package is free software; you can redistribute it and/or
  12 **      modify it under the terms of the GNU General Public License as
  13 **      published by the Free Software Foundation; either version 2 of
  14 **      the License, or (at your option) any later version.
  15 **
  16 **      This package is distributed in the hope that it will be useful,
  17 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19 **      General Public License for more details.
  20 **      \endlegal
  21 */
  22 /* ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #ifdef USING_PCH
  27 #       include "pch.h"
  28 #else
  29 #ifdef HAVE_CONFIG_H
  30 #       include <config.h>
  31 #endif
  32
  33 #include "widget_timeslider.h"
  34
  35 #include <ETL/misc>
  36
  37 #include <cmath>
  38
  39 #include "general.h"
  40
  41 #endif
  42
  43 /* === U S I N G =========================================================== */
  44
  45 using namespace std;
  46 using namespace etl;
  47 using namespace synfig;
  48
  49 using studio::Widget_Timeslider;
  50
  51 /* === M A C R O S ========================================================= */
  52
  53 /* === G L O B A L S ======================================================= */
  54 const double zoominfactor = 0.75;
  55 const double zoomoutfactor = 1/zoominfactor;
  56
  57 /* === P R O C E D U R E S ================================================= */
  58
  59 Gdk::Color get_interp_color(synfig::Interpolation x)
  60 {
  61         switch(x)
  62         {
  63         case INTERPOLATION_TCB:
  64                 return Gdk::Color("#00B000");
  65
  66                 break;
  67
  68         case INTERPOLATION_LINEAR:
  69                 return Gdk::Color("#B0B000");
  70                 break;
  71
  72         case INTERPOLATION_CONSTANT:
  73                 return Gdk::Color("#C70000");
  74                 break;
  75
  76         case INTERPOLATION_HALT:
  77                 return Gdk::Color("#00b0b0");
  78                 break;
  79
  80         case INTERPOLATION_MANUAL:
  81                 return Gdk::Color("#B000B0");
  82                 break;
  83
  84         case INTERPOLATION_UNDEFINED: default:
  85                 return Gdk::Color("#808080");
  86                 break;
  87         }
  88 }
  89
  90 static Gdk::Color
  91 color_darken(Gdk::Color x, float amount)
  92 {
  93         double   red = x.get_red_p()   * amount;
  94         double green = x.get_green_p() * amount;
  95         double  blue = x.get_blue_p()  * amount;
  96
  97         x.set_rgb_p(  red > 1 ? 1 : red,
  98                                 green > 1 ? 1 : green,
  99                                  blue > 1 ? 1 : blue);
 100
 101         return x;
 102 }
 103
 104 void
 105 studio::render_time_point_to_window(
 106         const Glib::RefPtr<Gdk::Drawable>& window,
 107         const Gdk::Rectangle& area,
 108         const synfig::TimePoint &tp,
 109         bool selected
 110 )
 111 {
 112         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(window));
 113         const Gdk::Color black("#000000");
 114
 115         if(selected)
 116                 gc->set_line_attributes(2,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 117         else
 118                 gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 119
 120         Gdk::Color color;
 121         std::vector<Gdk::Point> points;
 122
 123 /*-     BEFORE ------------------------------------- */
 124
 125         color=get_interp_color(tp.get_before());
 126         color=color_darken(color,1.0f);
 127         if(selected)color=color_darken(color,1.3f);
 128         gc->set_rgb_fg_color(color);
 129
 130         switch(tp.get_before())
 131         {
 132         case INTERPOLATION_TCB:
 133                 window->draw_arc(
 134                         gc,
 135                         true,
 136                         area.get_x(),
 137                         area.get_y(),
 138                         area.get_width(),
 139                         area.get_height(),
 140                         64*90,
 141                         64*180
 142                 );
 143                 gc->set_rgb_fg_color(black);
 144                 window->draw_arc(
 145                         gc,
 146                         false,
 147                         area.get_x(),
 148                         area.get_y(),
 149                         area.get_width(),
 150                         area.get_height(),
 151                         64*90,
 152                         64*180
 153                 );
 154                 break;
 155
 156         case INTERPOLATION_HALT:
 157                 window->draw_arc(
 158                         gc,
 159                         true,
 160                         area.get_x(),
 161                         area.get_y(),
 162                         area.get_width(),
 163                         area.get_height()*2,
 164                         64*90,
 165                         64*90
 166                 );
 167                 gc->set_rgb_fg_color(black);
 168                 window->draw_arc(
 169                         gc,
 170                         false,
 171                         area.get_x(),
 172                         area.get_y(),
 173                         area.get_width(),
 174                         area.get_height()*2,
 175                         64*90,
 176                         64*90
 177                 );
 178                 break;
 179
 180         case INTERPOLATION_LINEAR:
 181                 points.clear();
 182                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 183                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()));
 184                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 185                 window->draw_polygon(gc,true,points);
 186                 gc->set_rgb_fg_color(black);
 187                 window->draw_lines(gc,points);
 188                 break;
 189
 190         case INTERPOLATION_CONSTANT:
 191                 points.clear();
 192                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 193                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/4,area.get_y()));
 194                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/4,area.get_y()+area.get_height()/2));
 195                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()/2));
 196                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()));
 197                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 198                 window->draw_polygon(gc,true,points);
 199                 gc->set_rgb_fg_color(black);
 200                 window->draw_lines(gc,points);
 201                 break;
 202
 203         case INTERPOLATION_UNDEFINED: default:
 204                 points.clear();
 205                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 206                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/3,area.get_y()));
 207                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()/3));
 208                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()*2/3));
 209                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/3,area.get_y()+area.get_height()));
 210                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 211                 window->draw_polygon(gc,true,points);
 212                 gc->set_rgb_fg_color(black);
 213                 window->draw_lines(gc,points);
 214                 break;
 215         }
 216
 217 /*-     AFTER -------------------------------------- */
 218
 219         color=get_interp_color(tp.get_after());
 220         color=color_darken(color,0.8f);
 221         if(selected)color=color_darken(color,1.3f);
 222         gc->set_rgb_fg_color(color);
 223
 224
 225         switch(tp.get_after())
 226         {
 227         case INTERPOLATION_TCB:
 228                 window->draw_arc(
 229                         gc,
 230                         true,
 231                         area.get_x(),
 232                         area.get_y(),
 233                         area.get_width(),
 234                         area.get_height(),
 235                         64*270,
 236                         64*180
 237                 );
 238                 gc->set_rgb_fg_color(black);
 239                 window->draw_arc(
 240                         gc,
 241                         false,
 242                         area.get_x(),
 243                         area.get_y(),
 244                         area.get_width(),
 245                         area.get_height(),
 246                         64*270,
 247                         64*180
 248                 );
 249                 break;
 250
 251         case INTERPOLATION_HALT:
 252                 window->draw_arc(
 253                         gc,
 254                         true,
 255                         area.get_x(),
 256                         area.get_y()-area.get_height(),
 257                         area.get_width(),
 258                         area.get_height()*2,
 259                         64*270,
 260                         64*90
 261                 );
 262                 gc->set_rgb_fg_color(black);
 263                 window->draw_arc(
 264                         gc,
 265                         false,
 266                         area.get_x(),
 267                         area.get_y()-area.get_height(),
 268                         area.get_width(),
 269                         area.get_height()*2,
 270                         64*270,
 271                         64*90
 272                 );
 273                 break;
 274
 275         case INTERPOLATION_LINEAR:
 276                 points.clear();
 277                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 278                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()));
 279                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 280                 window->draw_polygon(gc,true,points);
 281                 gc->set_rgb_fg_color(black);
 282                 window->draw_lines(gc,points);
 283                 break;
 284
 285         case INTERPOLATION_CONSTANT:
 286                 points.clear();
 287                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 288                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()));
 289                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()+area.get_height()/2));
 290                 points.push_back(Gdk::Point(area.get_x()+area.get_width()*3/4,area.get_y()+area.get_height()/2));
 291                 points.push_back(Gdk::Point(area.get_x()+area.get_width()*3/4,area.get_y()+area.get_height()));
 292                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 293                 window->draw_polygon(gc,true,points);
 294                 gc->set_rgb_fg_color(black);
 295                 window->draw_lines(gc,points);
 296                 break;
 297
 298         case INTERPOLATION_UNDEFINED: default:
 299                 points.clear();
 300                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 301                 points.push_back(Gdk::Point(area.get_x()+area.get_width()*2/3,area.get_y()));
 302                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()+area.get_height()/3));
 303                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()+area.get_height()*2/3));
 304                 points.push_back(Gdk::Point(area.get_x()+area.get_width()*2/3,area.get_y()+area.get_height()));
 305                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 306                 window->draw_polygon(gc,true,points);
 307                 gc->set_rgb_fg_color(black);
 308                 window->draw_lines(gc,points);
 309                 break;
 310         }
 311
 312 }
 313
 314 /* === M E T H O D S ======================================================= */
 315
 316 /* === E N T R Y P O I N T ================================================= */
 317 double defaultfps = 24;
 318 const int fullheight = 20;
 319
 320 Widget_Timeslider::Widget_Timeslider()
 321 :layout(Pango::Layout::create(get_pango_context())),
 322 adj_default(0,0,2,1/defaultfps,10/defaultfps),
 323 adj_timescale(0),
 324 //invalidated(false),
 325 last_event_time(0),
 326 fps(defaultfps),
 327 dragscroll(false)
 328 {
 329         set_size_request(-1,fullheight);
 330
 331         //                click                    scroll                     zoom
 332         add_events( Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK
 333                                 | Gdk::BUTTON_MOTION_MASK | Gdk::SCROLL_MASK );
 334
 335         set_time_adjustment(&adj_default);
 336         //update_times();
 337 }
 338
 339 Widget_Timeslider::~Widget_Timeslider()
 340 {
 341 }
 342
 343 void Widget_Timeslider::set_time_adjustment(Gtk::Adjustment *x)
 344 {
 345         //disconnect old connections
 346         time_value_change.disconnect();
 347         time_other_change.disconnect();
 348
 349         //connect update function to new adjustment
 350         adj_timescale = x;
 351
 352         if(x)
 353         {
 354                 time_value_change = x->signal_value_changed().connect(sigc::mem_fun(*this,&Widget_Timeslider::queue_draw));
 355                 time_other_change = x->signal_changed().connect(sigc::mem_fun(*this,&Widget_Timeslider::queue_draw));
 356                 //invalidated = true;
 357                 //refresh();
 358         }
 359 }
 360
 361 void Widget_Timeslider::set_global_fps(float d)
 362 {
 363         if(fps != d)
 364         {
 365                 fps = d;
 366
 367                 //update everything since we need to redraw already
 368                 //invalidated = true;
 369                 //refresh();
 370                 queue_draw();
 371         }
 372 }
 373
 374 /*void Widget_Timeslider::update_times()
 375 {
 376         if(adj_timescale)
 377         {
 378                 start = adj_timescale->get_lower();
 379                 end = adj_timescale->get_upper();
 380                 current = adj_timescale->get_value();
 381         }
 382 }*/
 383
 384 void Widget_Timeslider::refresh()
 385 {
 386 }
 387 /*
 388 {
 389         if(invalidated)
 390         {
 391                 queue_draw();
 392         }else if(adj_timescale)
 393         {
 394                 double  l = adj_timescale->get_lower(),
 395                                 u = adj_timescale->get_upper(),
 396                                 v = adj_timescale->get_value();
 397
 398                 bool invalid = (l != start) || (u != end) || (v != current);
 399
 400                 start = l;
 401                 end = u;
 402                 current = v;
 403
 404                 if(invalid) queue_draw();
 405         }
 406 }*/
 407
 408 bool Widget_Timeslider::redraw(bool /*doublebuffer*/)
 409 {
 410         Glib::RefPtr<Gdk::Window> window = get_window();
 411
 412         if(!window) return false;
 413
 414         Glib::RefPtr<Gdk::GC>   gc = Gdk::GC::create(window);
 415         if(!gc) return false;
 416
 417         //synfig::info("Drawing Timeslider");
 418         //clear and update to current values
 419         //invalidated = false;
 420         //update_times();
 421
 422         //draw grey rectangle
 423         Gdk::Color      c("#7f7f7f");
 424         gc->set_rgb_fg_color(c);
 425         gc->set_background(c);
 426
 427         //Get the data for the window and the params to draw it...
 428         int w = get_width(), h = get_height();
 429
 430         window->draw_rectangle(gc,true,0,0,w,h);
 431
 432         const double EPSILON = 1e-6;
 433         if(!adj_timescale || w == 0) return true;
 434
 435         //Get the time information since we now know it's valid
 436         double  start = adj_timescale->get_lower(),
 437                         end = adj_timescale->get_upper(),
 438                         current = adj_timescale->get_value();
 439
 440         if(end-start < EPSILON) return true;
 441
 442         //synfig::info("Drawing Lines");
 443
 444         //draw all the time stuff
 445         double dtdp = (end - start)/get_width();
 446         double dpdt = 1/dtdp;
 447
 448         //lines
 449
 450         //Draw the time line...
 451         double tpx = (current-start)*dpdt;
 452         gc->set_rgb_fg_color(Gdk::Color("#ffaf00"));
 453         window->draw_line(gc,round_to_int(tpx),0,round_to_int(tpx),fullheight);
 454
 455         //normal line/text color
 456         gc->set_rgb_fg_color(Gdk::Color("#333333"));
 457
 458         //draw these lines... (always 5 between) maybe 6?
 459         const int subdiv = 4;
 460
 461         //1h 45 30 20 10 5
 462         //..., 3m, 2m, 1m30s, 1m, 30s, 20s, 10s, 5s, 3s, 2s, 1s, 0.5s
 463         //frames... (how???)
 464         double ranges[] =
 465         { 1.0/fps,subdiv/fps,0.25,0.5, 1, 2, 3, 5, 10, 20, 30, 60, 90, 120, 180, 300, 600, 1200, 1800, 2700, 3600 };
 466         //{ 3600, 2700, 1800, 1200, 600, 300, 180, 120, 90, 60, 30, 20, 10, 5, 3, 2, 1, 0.5 };
 467         const int ranges_size = sizeof(ranges)/sizeof(double);
 468
 469         double lowerrange = dtdp*75, upperrange = dtdp*150;
 470         double midrange = (lowerrange + upperrange)/2;
 471
 472         //find most ideal scale
 473         double scale = ranges[0];
 474         {
 475                 double *val = binary_find(ranges, ranges+ranges_size, midrange);
 476                 double *after = val+1;
 477
 478                 if(val >= ranges+ranges_size)
 479                 {
 480                         val = ranges+ranges_size-1;
 481                 }
 482
 483                 if(after >= ranges+ranges_size)
 484                 {
 485                         after = ranges+ranges_size-1;
 486                 }
 487
 488                 scale = *val;
 489
 490                 double diff = abs(scale - midrange), diff2 = abs(*after - midrange);
 491                 if(diff2 < diff)
 492                         scale = *after;
 493         }
 494
 495         //synfig::info("Range found: (l %.2lf,u %.2lf - m %.2lf) -> %.2lf",lowerrange,upperrange,midrange,scale);
 496
 497         //search around this area to get the right one
 498
 499
 500         //get first valid line and its position in pixel space
 501         double time = 0;
 502         double pixel = 0;
 503
 504         int sdindex = 0;
 505
 506         double subr = scale / subdiv;
 507
 508         //get its position inside...
 509         time = ceil(start/subr)*subr - start;
 510         pixel = time*dpdt;
 511
 512         //absolute time of the line to be drawn
 513         time += start;
 514
 515         { //inside the big'n
 516                 double t = (time/scale - floor(time/scale))*subdiv; // the difference from the big mark in 0:1
 517                 //sdindex = (int)floor(t + 0.5); //get how far through the range it is...
 518                 sdindex = round_to_int(t); //get how far through the range it is...
 519
 520                 //synfig::info("Extracted fr %.2lf -> %d", t, sdindex);
 521         }
 522
 523         //synfig::info("Initial values: %.4lf t, %.1lf pixels, %d i", time,pixel,sdindex);
 524
 525         //loop to draw
 526         const int heightbig = 12;
 527         const int heightsmall = 4;
 528
 529         int width = get_width();
 530         while( pixel < width )
 531         {
 532                 int xpx = round_to_int(pixel);
 533
 534                 //draw big
 535                 if(sdindex == 0)
 536                 {
 537                         window->draw_line(gc,xpx,0,xpx,heightbig);
 538                         //round the time to nearest frame and draw the text
 539                         Time tm((double)time);
 540                         if(get_global_fps()) tm.round(get_global_fps());
 541                         Glib::ustring timecode(tm.get_string(get_global_fps(),App::get_time_format()));
 542
 543                         //gc->set_rgb_fg_color(Gdk::Color("#000000"));
 544                         layout->set_text(timecode);
 545                         window->draw_layout(gc,xpx+2,heightsmall,layout);
 546                 }else
 547                 {
 548                         window->draw_line(gc,xpx,0,xpx,heightsmall);
 549                 }
 550
 551                 //increment time and position
 552                 pixel += subr / dtdp;
 553                 time += subr;
 554
 555                 //increment index
 556                 if(++sdindex >= subdiv) sdindex -= subdiv;
 557         }
 558
 559         return true;
 560 }
 561
 562 bool Widget_Timeslider::on_motion_notify_event(GdkEventMotion* event) //for dragging
 563 {
 564         if(!adj_timescale) return false;
 565
 566         Gdk::ModifierType mod = Gdk::ModifierType(event->state);
 567
 568         //scrolling...
 569
 570         //NOTE: we might want to address the possibility of dragging with both buttons held down
 571
 572         if(mod & Gdk::BUTTON2_MASK)
 573         {
 574
 575                 //we need this for scrolling by dragging
 576                 double  curx = event->x;
 577
 578                 double  start = adj_timescale->get_lower(),
 579                                 end = adj_timescale->get_upper();
 580
 581
 582                 if(dragscroll)
 583                 {
 584                         if(event->time-last_event_time<30)
 585                                 return false;
 586                         else
 587                                 last_event_time=event->time;
 588
 589                         if(abs(lastx - curx) < 1 && end != start) return true;
 590                         //translate the window and correct it
 591
 592                         //update our stuff so we are operating correctly
 593                         //invalidated = true;
 594                         //update_times();
 595
 596                         //Note: Use inverse of mouse movement because of conceptual space relationship
 597                         double diff = lastx - curx; //curx - lastx;
 598
 599                         //NOTE: This might be incorrect...
 600                         //fraction to move...
 601                         double dpx = (end - start)/get_width();
 602                         lastx = curx;
 603
 604                         diff *= dpx;
 605
 606                         //Adjust...
 607                         start += diff;
 608                         end += diff;
 609
 610                         //But clamp to bounds if they exist...
 611                         //HACK - bounds should not be required for this slider
 612                         if(adj_bounds)
 613                         {
 614                                 if(start < adj_bounds->get_lower())
 615                                 {
 616                                         diff = adj_bounds->get_lower() - start;
 617                                         start += diff;
 618                                         end += diff;
 619                                 }
 620
 621                                 if(end > adj_bounds->get_upper())
 622                                 {
 623                                         diff = adj_bounds->get_upper() - end;
 624                                         start += diff;
 625                                         end += diff;
 626                                 }
 627                         }
 628
 629                         //synfig::info("Scrolling timerange to (%.4f,%.4f)",start,end);
 630
 631                         adj_timescale->set_lower(start);
 632                         adj_timescale->set_upper(end);
 633
 634                         adj_timescale->changed();
 635                 }else
 636                 {
 637                         dragscroll = true;
 638                         lastx = curx;
 639                         //lasty = cury;
 640                 }
 641
 642                 return true;
 643         }
 644
 645         if(mod & Gdk::BUTTON1_MASK)
 646         {
 647                 double curx = event->x;
 648
 649                 //get time from drag...
 650                 double  start = adj_timescale->get_lower(),
 651                                 end = adj_timescale->get_upper(),
 652                                 current = adj_timescale->get_value();
 653                 double t = start + curx*(end - start)/get_width();
 654
 655                 //snap it to fps - if they exist...
 656                 if(fps)
 657                 {
 658                         t = floor(t*fps + 0.5)/fps;
 659                 }
 660
 661                 //set time if needed
 662                 if(current != t)
 663                 {
 664                         adj_timescale->set_value(t);
 665
 666                         //Fixed this to actually do what it's supposed to...
 667                         if(event->time-last_event_time>50)
 668                         {
 669                                 adj_timescale->value_changed();
 670                                 last_event_time = event->time;
 671                         }
 672                 }
 673
 674                 return true;
 675         }
 676
 677         return false;
 678 }
 679
 680 bool Widget_Timeslider::on_scroll_event(GdkEventScroll* event) //for zooming
 681 {
 682         if(!adj_timescale) return false;
 683
 684         //Update so we are calculating based on current values
 685         //update_times();
 686
 687         //figure out if we should center ourselves on the current time
 688         bool center = false;
 689
 690         //we want to zoom in on the time value if control is held down
 691         if(Gdk::ModifierType(event->state) & Gdk::CONTROL_MASK)
 692         {
 693                 center = true;
 694         }
 695
 696         switch(event->direction)
 697         {
 698                 case GDK_SCROLL_UP: //zoom in
 699                 {
 700                         zoom_in(center);
 701
 702                         return true;
 703                 }
 704                 case GDK_SCROLL_DOWN: //zoom out
 705                 {
 706                         zoom_out(center);
 707
 708                         return true;
 709                 }
 710
 711                 default:
 712                 {
 713                         return false;
 714                 }
 715         }
 716 }
 717
 718 void Widget_Timeslider::zoom_in(bool centerontime)
 719 {
 720         if(!adj_timescale) return;
 721
 722         double  start = adj_timescale->get_lower(),
 723                         end = adj_timescale->get_upper(),
 724                         current = adj_timescale->get_value();
 725
 726         double focuspoint = centerontime ? current : (start + end)/2;
 727
 728         //calculate new beginning and end
 729         end = focuspoint + (end-focuspoint)*zoominfactor;
 730         start = focuspoint + (start-focuspoint)*zoominfactor;
 731
 732         //synfig::info("Zooming in timerange to (%.4f,%.4f)",start,end);
 733         if(adj_bounds)
 734         {
 735                 if(start < adj_bounds->get_lower())
 736                 {
 737                         start = adj_bounds->get_lower();
 738                 }
 739
 740                 if(end > adj_bounds->get_upper())
 741                 {
 742                         end = adj_bounds->get_upper();
 743                 }
 744         }
 745
 746         //reset values
 747         adj_timescale->set_lower(start);
 748         adj_timescale->set_upper(end);
 749
 750         //call changed function
 751         adj_timescale->changed();
 752 }
 753
 754 void Widget_Timeslider::zoom_out(bool centerontime)
 755 {
 756         if(!adj_timescale) return;
 757
 758         double  start = adj_timescale->get_lower(),
 759                         end = adj_timescale->get_upper(),
 760                         current = adj_timescale->get_value();
 761
 762         double focuspoint = centerontime ? current : (start + end)/2;
 763
 764         //calculate new beginning and end
 765         end = focuspoint + (end-focuspoint)*zoomoutfactor;
 766         start = focuspoint + (start-focuspoint)*zoomoutfactor;
 767
 768         //synfig::info("Zooming out timerange to (%.4f,%.4f)",start,end);
 769         if(adj_bounds)
 770         {
 771                 if(start < adj_bounds->get_lower())
 772                 {
 773                         start = adj_bounds->get_lower();
 774                 }
 775
 776                 if(end > adj_bounds->get_upper())
 777                 {
 778                         end = adj_bounds->get_upper();
 779                 }
 780         }
 781
 782         //reset values
 783         adj_timescale->set_lower(start);
 784         adj_timescale->set_upper(end);
 785
 786         //call changed function
 787         adj_timescale->changed();
 788 }
 789
 790 bool Widget_Timeslider::on_button_press_event(GdkEventButton *event) //for clicking
 791 {
 792         switch(event->button)
 793         {
 794                 //time click...
 795                 case 1:
 796                 {
 797                         double  start = adj_timescale->get_lower(),
 798                                         end = adj_timescale->get_upper(),
 799                                         current = adj_timescale->get_value();
 800
 801                         double w = get_width();
 802                         double t = start + (end - start) * event->x / w;
 803
 804                         t = floor(t*fps + 0.5)/fps;
 805
 806                         /*synfig::info("Clicking time from %.3lf to %.3lf [(%.2lf,%.2lf) %.2lf / %.2lf ... %.2lf",
 807                                                 current, vt, start, end, event->x, w, fps);*/
 808
 809                         if(t != current)
 810                         {
 811                                 current = t;
 812
 813                                 if(adj_timescale)
 814                                 {
 815                                         adj_timescale->set_value(current);
 816                                         adj_timescale->value_changed();
 817                                 }
 818                         }
 819
 820                         break;
 821                 }
 822
 823                 //scroll click
 824                 case 2:
 825                 {
 826                         //start dragging
 827                         dragscroll = true;
 828                         lastx = event->x;
 829                         //lasty = event->y;
 830
 831                         return true;
 832                 }
 833
 834                 default:
 835                 {
 836                         break;
 837                 }
 838         }
 839
 840         return false;
 841 }
 842
 843 bool Widget_Timeslider::on_button_release_event(GdkEventButton *event) //end drag
 844 {
 845         switch(event->button)
 846         {
 847                 case 2:
 848                 {
 849                         //start dragging
 850                         dragscroll = false;
 851                         return true;
 852                 }
 853
 854                 default:
 855                 {
 856                         break;
 857                 }
 858         }
 859
 860         return false;
 861 }