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, 2008 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()-area.get_height()/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         switch(tp.get_after())
 225         {
 226         case INTERPOLATION_TCB:
 227                 window->draw_arc(
 228                         gc,
 229                         true,
 230                         area.get_x(),
 231                         area.get_y(),
 232                         area.get_width(),
 233                         area.get_height(),
 234                         64*270,
 235                         64*180
 236                 );
 237                 gc->set_rgb_fg_color(black);
 238                 window->draw_arc(
 239                         gc,
 240                         false,
 241                         area.get_x(),
 242                         area.get_y(),
 243                         area.get_width(),
 244                         area.get_height(),
 245                         64*270,
 246                         64*180
 247                 );
 248                 break;
 249
 250         case INTERPOLATION_HALT:
 251                 window->draw_arc(
 252                         gc,
 253                         true,
 254                         area.get_x(),
 255                         area.get_y()-area.get_height(),
 256                         area.get_width(),
 257                         area.get_height()*2,
 258                         64*270,
 259                         64*90
 260                 );
 261                 gc->set_rgb_fg_color(black);
 262                 window->draw_arc(
 263                         gc,
 264                         false,
 265                         area.get_x(),
 266                         area.get_y()-area.get_height(),
 267                         area.get_width(),
 268                         area.get_height()*2,
 269                         64*270,
 270                         64*90
 271                 );
 272                 break;
 273
 274         case INTERPOLATION_LINEAR:
 275                 points.clear();
 276                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 277                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()));
 278                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 279                 window->draw_polygon(gc,true,points);
 280                 gc->set_rgb_fg_color(black);
 281                 window->draw_lines(gc,points);
 282                 break;
 283
 284         case INTERPOLATION_CONSTANT:
 285                 points.clear();
 286                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 287                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()));
 288                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()+area.get_height()/2));
 289                 points.push_back(Gdk::Point(area.get_x()+area.get_width()-area.get_width()/4,area.get_y()+area.get_height()/2));
 290                 points.push_back(Gdk::Point(area.get_x()+area.get_width()-area.get_width()/4,area.get_y()+area.get_height()));
 291                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 292                 window->draw_polygon(gc,true,points);
 293                 gc->set_rgb_fg_color(black);
 294                 window->draw_lines(gc,points);
 295                 break;
 296
 297         case INTERPOLATION_UNDEFINED: default:
 298                 points.clear();
 299                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 300                 points.push_back(Gdk::Point(area.get_x()+area.get_width()-area.get_width()/3,area.get_y()));
 301                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()+area.get_height()/3));
 302                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()+area.get_height()-area.get_height()/3));
 303                 points.push_back(Gdk::Point(area.get_x()+area.get_width()-area.get_width()/3,area.get_y()+area.get_height()));
 304                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 305                 window->draw_polygon(gc,true,points);
 306                 gc->set_rgb_fg_color(black);
 307                 window->draw_lines(gc,points);
 308                 break;
 309         }
 310
 311 }
 312
 313 /* === M E T H O D S ======================================================= */
 314
 315 /* === E N T R Y P O I N T ================================================= */
 316 double defaultfps = 24;
 317 const int fullheight = 20;
 318
 319 Widget_Timeslider::Widget_Timeslider()
 320 :layout(Pango::Layout::create(get_pango_context())),
 321 adj_default(0,0,2,1/defaultfps,10/defaultfps),
 322 adj_timescale(0),
 323 //invalidated(false),
 324 last_event_time(0),
 325 fps(defaultfps),
 326 dragscroll(false)
 327 {
 328         set_size_request(-1,fullheight);
 329
 330         //                click                    scroll                     zoom
 331         add_events( Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK
 332                                 | Gdk::BUTTON_MOTION_MASK | Gdk::SCROLL_MASK );
 333
 334         set_time_adjustment(&adj_default);
 335         //update_times();
 336 }
 337
 338 Widget_Timeslider::~Widget_Timeslider()
 339 {
 340 }
 341
 342 void Widget_Timeslider::set_time_adjustment(Gtk::Adjustment *x)
 343 {
 344         //disconnect old connections
 345         time_value_change.disconnect();
 346         time_other_change.disconnect();
 347
 348         //connect update function to new adjustment
 349         adj_timescale = x;
 350
 351         if(x)
 352         {
 353                 time_value_change = x->signal_value_changed().connect(sigc::mem_fun(*this,&Widget_Timeslider::queue_draw));
 354                 time_other_change = x->signal_changed().connect(sigc::mem_fun(*this,&Widget_Timeslider::queue_draw));
 355                 //invalidated = true;
 356                 //refresh();
 357         }
 358 }
 359
 360 void Widget_Timeslider::set_global_fps(float d)
 361 {
 362         if(fps != d)
 363         {
 364                 fps = d;
 365
 366                 //update everything since we need to redraw already
 367                 //invalidated = true;
 368                 //refresh();
 369                 queue_draw();
 370         }
 371 }
 372
 373 /*void Widget_Timeslider::update_times()
 374 {
 375         if(adj_timescale)
 376         {
 377                 start = adj_timescale->get_lower();
 378                 end = adj_timescale->get_upper();
 379                 current = adj_timescale->get_value();
 380         }
 381 }*/
 382
 383 void Widget_Timeslider::refresh()
 384 {
 385 }
 386 /*
 387 {
 388         if(invalidated)
 389         {
 390                 queue_draw();
 391         }else if(adj_timescale)
 392         {
 393                 double  l = adj_timescale->get_lower(),
 394                                 u = adj_timescale->get_upper(),
 395                                 v = adj_timescale->get_value();
 396
 397                 bool invalid = (l != start) || (u != end) || (v != current);
 398
 399                 start = l;
 400                 end = u;
 401                 current = v;
 402
 403                 if(invalid) queue_draw();
 404         }
 405 }*/
 406
 407 bool Widget_Timeslider::redraw(bool /*doublebuffer*/)
 408 {
 409         Glib::RefPtr<Gdk::Window> window = get_window();
 410
 411         if(!window) return false;
 412
 413         Glib::RefPtr<Gdk::GC>   gc = Gdk::GC::create(window);
 414         if(!gc) return false;
 415
 416         //synfig::info("Drawing Timeslider");
 417         //clear and update to current values
 418         //invalidated = false;
 419         //update_times();
 420
 421         //draw grey rectangle
 422         Gdk::Color      c("#7f7f7f");
 423         gc->set_rgb_fg_color(c);
 424         gc->set_background(c);
 425
 426         //Get the data for the window and the params to draw it...
 427         int w = get_width(), h = get_height();
 428
 429         window->draw_rectangle(gc,true,0,0,w,h);
 430
 431         const double EPSILON = 1e-6;
 432         if(!adj_timescale || w == 0) return true;
 433
 434         //Get the time information since we now know it's valid
 435         double  start = adj_timescale->get_lower(),
 436                         end = adj_timescale->get_upper(),
 437                         current = adj_timescale->get_value();
 438
 439         if(end-start < EPSILON) return true;
 440
 441         //synfig::info("Drawing Lines");
 442
 443         //draw all the time stuff
 444         double dtdp = (end - start)/get_width();
 445         double dpdt = 1/dtdp;
 446
 447         //lines
 448
 449         //Draw the time line...
 450         double tpx = (current-start)*dpdt;
 451         gc->set_rgb_fg_color(Gdk::Color("#ffaf00"));
 452         window->draw_line(gc,round_to_int(tpx),0,round_to_int(tpx),fullheight);
 453
 454         //normal line/text color
 455         gc->set_rgb_fg_color(Gdk::Color("#333333"));
 456
 457         int ifps = round_to_int(fps);
 458         if (ifps < 1) ifps = 1;
 459
 460         std::vector<double> ranges;
 461
 462         unsigned int pos = 0;
 463
 464         // build a list of all the factors of the frame rate
 465         for (int i = 1; i*i <= ifps; i++)
 466                 if ((ifps%i) == 0)
 467                 {
 468                         ranges.insert(ranges.begin()+pos, i/fps);
 469                         if (i*i != ifps)
 470                                 ranges.insert(ranges.begin()+pos+1, ifps/i/fps);
 471                         pos++;
 472                 }
 473
 474         // fill in any gaps where one factor is more than 2 times the previous
 475         std::vector<double>::iterator iter, next;
 476         pos = 0;
 477         for (pos = 0; pos < ranges.size()-1; pos++)
 478         {
 479                 iter = ranges.begin()+pos;
 480                 next = iter+1;
 481                 if (*iter*2 < *next)
 482                         ranges.insert(next, *iter*2);
 483         }
 484
 485         double more_ranges[] = {
 486                 2, 3, 5, 10, 20, 30, 60, 90, 120, 180,
 487                 300, 600, 1200, 1800, 2700, 3600, 3600*2,
 488                 3600*4, 3600*8, 3600*16, 3600*32, 3600*64,
 489                 3600*128, 3600*256, 3600*512, 3600*1024 };
 490
 491         ranges.insert(ranges.end(), more_ranges, more_ranges + sizeof(more_ranges)/sizeof(double));
 492
 493         double lowerrange = dtdp*140, upperrange = dtdp*280;
 494         double midrange = (lowerrange + upperrange)/2;
 495
 496         //find most ideal scale
 497         double scale;
 498         next = binary_find(ranges.begin(), ranges.end(), midrange);
 499         iter = next++;
 500
 501         if (iter == ranges.end()) iter--;
 502         if (next == ranges.end()) next--;
 503
 504         if (abs(*next - midrange) < abs(*iter - midrange))
 505                 iter = next;
 506
 507         scale = *iter;
 508
 509         // subdivide into this many tick marks (8 or less)
 510         int subdiv = round_to_int(scale * ifps);
 511
 512         if (subdiv > 8)
 513         {
 514                 const int ideal = subdiv;
 515
 516                 // find a number of tick marks that nicely divides the scale
 517                 // (5 minutes divided by 6 is 50s, but that's not 'nice' -
 518                 //  5 ticks of 1m each is much simpler than 6 ticks of 50s)
 519                 for (subdiv = 8; subdiv > 0; subdiv--)
 520                         if ((ideal <= ifps*2       && (ideal % (subdiv           )) == 0) ||
 521                                 (ideal <= ifps*2*60    && (ideal % (subdiv*ifps      )) == 0) ||
 522                                 (ideal <= ifps*2*60*60 && (ideal % (subdiv*ifps*60   )) == 0) ||
 523                                 (true                  && (ideal % (subdiv*ifps*60*60)) == 0))
 524                                 break;
 525
 526                 // if we didn't find anything, use 4 ticks
 527                 if (!subdiv)
 528                         subdiv = 4;
 529         }
 530
 531         time_per_tickmark = scale / subdiv;
 532
 533         //get first valid line and its position in pixel space
 534         double time = 0;
 535         double pixel = 0;
 536
 537         int sdindex = 0;
 538
 539         double subr = scale / subdiv;
 540
 541         //get its position inside...
 542         time = ceil(start/subr)*subr - start;
 543         pixel = time*dpdt;
 544
 545         //absolute time of the line to be drawn
 546         time += start;
 547
 548         { //inside the big'n
 549                 double t = (time/scale - floor(time/scale))*subdiv; // the difference from the big mark in 0:1
 550                 //sdindex = (int)floor(t + 0.5); //get how far through the range it is...
 551                 sdindex = round_to_int(t); //get how far through the range it is...
 552                 if (sdindex == subdiv) sdindex = 0;
 553
 554                 //synfig::info("Extracted fr %.2lf -> %d", t, sdindex);
 555         }
 556
 557         //synfig::info("Initial values: %.4lf t, %.1lf pixels, %d i", time,pixel,sdindex);
 558
 559         //loop to draw
 560         const int heightbig = 12;
 561         const int heightsmall = 4;
 562
 563         int width = get_width();
 564         while( pixel < width )
 565         {
 566                 int xpx = round_to_int(pixel);
 567
 568                 //draw big
 569                 if(sdindex == 0)
 570                 {
 571                         window->draw_line(gc,xpx,0,xpx,heightbig);
 572                         //round the time to nearest frame and draw the text
 573                         Time tm((double)time);
 574                         if(get_global_fps()) tm.round(get_global_fps());
 575                         Glib::ustring timecode(tm.get_string(get_global_fps(),App::get_time_format()));
 576
 577                         //gc->set_rgb_fg_color(Gdk::Color("#000000"));
 578                         layout->set_text(timecode);
 579                         window->draw_layout(gc,xpx+2,heightsmall,layout);
 580                 }else
 581                 {
 582                         window->draw_line(gc,xpx,0,xpx,heightsmall);
 583                 }
 584
 585                 //increment time and position
 586                 pixel += subr / dtdp;
 587                 time += subr;
 588
 589                 //increment index
 590                 if(++sdindex >= subdiv) sdindex -= subdiv;
 591         }
 592
 593         return true;
 594 }
 595
 596 bool Widget_Timeslider::on_motion_notify_event(GdkEventMotion* event) //for dragging
 597 {
 598         if(!adj_timescale) return false;
 599
 600         Gdk::ModifierType mod = Gdk::ModifierType(event->state);
 601
 602         //scrolling...
 603
 604         //NOTE: we might want to address the possibility of dragging with both buttons held down
 605
 606         if(mod & Gdk::BUTTON2_MASK)
 607         {
 608
 609                 //we need this for scrolling by dragging
 610                 double  curx = event->x;
 611
 612                 double  start = adj_timescale->get_lower(),
 613                                 end = adj_timescale->get_upper();
 614
 615                 if(dragscroll)
 616                 {
 617                         if(event->time-last_event_time<30)
 618                                 return false;
 619                         else
 620                                 last_event_time=event->time;
 621
 622                         if(abs(lastx - curx) < 1 && end != start) return true;
 623                         //translate the window and correct it
 624
 625                         //update our stuff so we are operating correctly
 626                         //invalidated = true;
 627                         //update_times();
 628
 629                         //Note: Use inverse of mouse movement because of conceptual space relationship
 630                         double diff = lastx - curx; //curx - lastx;
 631
 632                         //NOTE: This might be incorrect...
 633                         //fraction to move...
 634                         double dpx = (end - start)/get_width();
 635                         lastx = curx;
 636
 637                         diff *= dpx;
 638
 639                         //Adjust...
 640                         start += diff;
 641                         end += diff;
 642
 643                         //But clamp to bounds if they exist...
 644                         //HACK - bounds should not be required for this slider
 645                         if(adj_bounds)
 646                         {
 647                                 if(start < adj_bounds->get_lower())
 648                                 {
 649                                         diff = adj_bounds->get_lower() - start;
 650                                         start += diff;
 651                                         end += diff;
 652                                 }
 653
 654                                 if(end > adj_bounds->get_upper())
 655                                 {
 656                                         diff = adj_bounds->get_upper() - end;
 657                                         start += diff;
 658                                         end += diff;
 659                                 }
 660                         }
 661
 662                         //synfig::info("Scrolling timerange to (%.4f,%.4f)",start,end);
 663
 664                         adj_timescale->set_lower(start);
 665                         adj_timescale->set_upper(end);
 666
 667                         adj_timescale->changed();
 668                 }else
 669                 {
 670                         dragscroll = true;
 671                         lastx = curx;
 672                         //lasty = cury;
 673                 }
 674
 675                 return true;
 676         }
 677
 678         if(mod & Gdk::BUTTON1_MASK)
 679         {
 680                 double curx = event->x;
 681
 682                 //get time from drag...
 683                 double  start = adj_timescale->get_lower(),
 684                                 end = adj_timescale->get_upper(),
 685                                 current = adj_timescale->get_value();
 686                 double t = start + curx*(end - start)/get_width();
 687
 688                 //snap it to fps - if they exist...
 689                 if(fps)
 690                 {
 691                         t = floor(t*fps + 0.5)/fps;
 692                 }
 693
 694                 //set time if needed
 695                 if(current != t)
 696                 {
 697                         adj_timescale->set_value(t);
 698
 699                         //Fixed this to actually do what it's supposed to...
 700                         if(event->time-last_event_time>50)
 701                         {
 702                                 adj_timescale->value_changed();
 703                                 last_event_time = event->time;
 704                         }
 705                 }
 706
 707                 return true;
 708         }
 709
 710         return false;
 711 }
 712
 713 bool Widget_Timeslider::on_scroll_event(GdkEventScroll* event) //for zooming
 714 {
 715         if(!adj_timescale) return false;
 716
 717         //Update so we are calculating based on current values
 718         //update_times();
 719
 720         //figure out if we should center ourselves on the current time
 721         bool center = false;
 722
 723         //we want to zoom in on the time value if control is held down
 724         if(Gdk::ModifierType(event->state) & Gdk::CONTROL_MASK)
 725                 center = true;
 726
 727         switch(event->direction)
 728         {
 729                 case GDK_SCROLL_UP: //zoom in
 730                         zoom_in(center);
 731                         return true;
 732
 733                 case GDK_SCROLL_DOWN: //zoom out
 734                         zoom_out(center);
 735                         return true;
 736
 737                 case GDK_SCROLL_RIGHT:
 738                 case GDK_SCROLL_LEFT:
 739                 {
 740                         double t = adj_timescale->get_value();
 741                         double orig_t = t;
 742                         double start = adj_timescale->get_lower();
 743                         double end = adj_timescale->get_upper();
 744                         double lower = adj_bounds->get_lower();
 745                         double upper = adj_bounds->get_upper();
 746                         double adj = time_per_tickmark;
 747
 748                         if( event->direction == GDK_SCROLL_RIGHT )
 749                         {
 750                                 // step forward one tick
 751                                 t += adj;
 752
 753                                 // don't go past the end of time
 754                                 if (t > upper)
 755                                         t = upper;
 756
 757                                 // if we are already in the right half of the slider
 758                                 if ((t-start)*2 > (end-start))
 759                                 {
 760                                         // if we can't scroll the background left one whole tick, scroll it to the end
 761                                         if (end > upper - (t-orig_t))
 762                                         {
 763                                                 adj_timescale->set_lower(upper - (end-start));
 764                                                 adj_timescale->set_upper(upper);
 765                                         }
 766                                         // else scroll the background left
 767                                         else
 768                                         {
 769                                                 adj_timescale->set_lower(start + (t-orig_t));
 770                                                 adj_timescale->set_upper(start + (t-orig_t) + (end-start));
 771                                         }
 772                                 }
 773                         }
 774                         else
 775                         {
 776                                 // step backwards one tick
 777                                 t -= adj;
 778
 779                                 // don't go past the start of time
 780                                 if (t < lower)
 781                                         t = lower;
 782
 783                                 // if we are already in the left half of the slider
 784                                 if ((t-start)*2 < (end-start))
 785                                 {
 786                                         // if we can't scroll the background right one whole tick, scroll it to the beginning
 787                                         if (start < lower + (orig_t-t))
 788                                         {
 789                                                 adj_timescale->set_lower(lower);
 790                                                 adj_timescale->set_upper(lower + (end-start));
 791                                         }
 792                                         // else scroll the background right
 793                                         else
 794                                         {
 795                                                 adj_timescale->set_lower(start - (orig_t-t));
 796                                                 adj_timescale->set_upper(start - (orig_t-t) + (end-start));
 797                                         }
 798                                 }
 799                         }
 800
 801                         if(adj_timescale)
 802                         {
 803                                 adj_timescale->set_value(t);
 804                                 adj_timescale->value_changed();
 805                         }
 806                         return true;
 807                 }
 808                 default:
 809                         return false;
 810         }
 811 }
 812
 813 void Widget_Timeslider::zoom_in(bool centerontime)
 814 {
 815         if(!adj_timescale) return;
 816
 817         double  start = adj_timescale->get_lower(),
 818                         end = adj_timescale->get_upper(),
 819                         current = adj_timescale->get_value();
 820
 821         double focuspoint = centerontime ? current : (start + end)/2;
 822
 823         //calculate new beginning and end
 824         end = focuspoint + (end-focuspoint)*zoominfactor;
 825         start = focuspoint + (start-focuspoint)*zoominfactor;
 826
 827         //synfig::info("Zooming in timerange to (%.4f,%.4f)",start,end);
 828         if(adj_bounds)
 829         {
 830                 if(start < adj_bounds->get_lower())
 831                 {
 832                         start = adj_bounds->get_lower();
 833                 }
 834
 835                 if(end > adj_bounds->get_upper())
 836                 {
 837                         end = adj_bounds->get_upper();
 838                 }
 839         }
 840
 841         //reset values
 842         adj_timescale->set_lower(start);
 843         adj_timescale->set_upper(end);
 844
 845         //call changed function
 846         adj_timescale->changed();
 847 }
 848
 849 void Widget_Timeslider::zoom_out(bool centerontime)
 850 {
 851         if(!adj_timescale) return;
 852
 853         double  start = adj_timescale->get_lower(),
 854                         end = adj_timescale->get_upper(),
 855                         current = adj_timescale->get_value();
 856
 857         double focuspoint = centerontime ? current : (start + end)/2;
 858
 859         //calculate new beginning and end
 860         end = focuspoint + (end-focuspoint)*zoomoutfactor;
 861         start = focuspoint + (start-focuspoint)*zoomoutfactor;
 862
 863         //synfig::info("Zooming out timerange to (%.4f,%.4f)",start,end);
 864         if(adj_bounds)
 865         {
 866                 if(start < adj_bounds->get_lower())
 867                 {
 868                         start = adj_bounds->get_lower();
 869                 }
 870
 871                 if(end > adj_bounds->get_upper())
 872                 {
 873                         end = adj_bounds->get_upper();
 874                 }
 875         }
 876
 877         //reset values
 878         adj_timescale->set_lower(start);
 879         adj_timescale->set_upper(end);
 880
 881         //call changed function
 882         adj_timescale->changed();
 883 }
 884
 885 bool Widget_Timeslider::on_button_press_event(GdkEventButton *event) //for clicking
 886 {
 887         switch(event->button)
 888         {
 889                 //time click...
 890                 case 1:
 891                 {
 892                         double  start = adj_timescale->get_lower(),
 893                                         end = adj_timescale->get_upper(),
 894                                         current = adj_timescale->get_value();
 895
 896                         double w = get_width();
 897                         double t = start + (end - start) * event->x / w;
 898
 899                         t = floor(t*fps + 0.5)/fps;
 900
 901                         /*synfig::info("Clicking time from %.3lf to %.3lf [(%.2lf,%.2lf) %.2lf / %.2lf ... %.2lf",
 902                                                 current, vt, start, end, event->x, w, fps);*/
 903
 904                         if(t != current)
 905                         {
 906                                 current = t;
 907
 908                                 if(adj_timescale)
 909                                 {
 910                                         adj_timescale->set_value(current);
 911                                         adj_timescale->value_changed();
 912                                 }
 913                         }
 914
 915                         break;
 916                 }
 917
 918                 //scroll click
 919                 case 2:
 920                 {
 921                         //start dragging
 922                         dragscroll = true;
 923                         lastx = event->x;
 924                         //lasty = event->y;
 925
 926                         return true;
 927                 }
 928
 929                 default:
 930                 {
 931                         break;
 932                 }
 933         }
 934
 935         return false;
 936 }
 937
 938 bool Widget_Timeslider::on_button_release_event(GdkEventButton *event) //end drag
 939 {
 940         switch(event->button)
 941         {
 942                 case 2:
 943                 {
 944                         //start dragging
 945                         dragscroll = false;
 946                         return true;
 947                 }
 948
 949                 default:
 950                 {
 951                         break;
 952                 }
 953         }
 954
 955         return false;
 956 }