synfig-studio/tags/synfigstudio_0_61_07/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 #endif
  40
  41 /* === U S I N G =========================================================== */
  42
  43 using namespace std;
  44 using namespace etl;
  45 using namespace synfig;
  46
  47 using studio::Widget_Timeslider;
  48
  49 /* === M A C R O S ========================================================= */
  50
  51 /* === G L O B A L S ======================================================= */
  52 const double zoominfactor = 0.75;
  53 const double zoomoutfactor = 1/zoominfactor;
  54
  55 /* === P R O C E D U R E S ================================================= */
  56
  57 Gdk::Color get_interp_color(synfig::Interpolation x)
  58 {
  59         switch(x)
  60         {
  61         case INTERPOLATION_TCB:
  62                 return Gdk::Color("#00B000");
  63
  64                 break;
  65
  66         case INTERPOLATION_LINEAR:
  67                 return Gdk::Color("#B0B000");
  68                 break;
  69
  70         case INTERPOLATION_CONSTANT:
  71                 return Gdk::Color("#C70000");
  72                 break;
  73
  74         case INTERPOLATION_HALT:
  75                 return Gdk::Color("#00b0b0");
  76                 break;
  77
  78         case INTERPOLATION_MANUAL:
  79                 return Gdk::Color("#B000B0");
  80                 break;
  81
  82         case INTERPOLATION_UNDEFINED: default:
  83                 return Gdk::Color("#808080");
  84                 break;
  85         }
  86 }
  87
  88 static Gdk::Color
  89 color_darken(Gdk::Color x, float amount)
  90 {
  91         double   red = x.get_red_p()   * amount;
  92         double green = x.get_green_p() * amount;
  93         double  blue = x.get_blue_p()  * amount;
  94
  95         x.set_rgb_p(  red > 1 ? 1 : red,
  96                                 green > 1 ? 1 : green,
  97                                  blue > 1 ? 1 : blue);
  98
  99         return x;
 100 }
 101
 102 void
 103 studio::render_time_point_to_window(
 104         const Glib::RefPtr<Gdk::Drawable>& window,
 105         const Gdk::Rectangle& area,
 106         const synfig::TimePoint &tp,
 107         bool selected
 108 )
 109 {
 110         Glib::RefPtr<Gdk::GC> gc(Gdk::GC::create(window));
 111         const Gdk::Color black("#000000");
 112
 113         if(selected)
 114                 gc->set_line_attributes(2,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 115         else
 116                 gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 117
 118         Gdk::Color color;
 119         std::vector<Gdk::Point> points;
 120
 121 /*-     BEFORE ------------------------------------- */
 122
 123         color=get_interp_color(tp.get_before());
 124         color=color_darken(color,1.0f);
 125         if(selected)color=color_darken(color,1.3f);
 126         gc->set_rgb_fg_color(color);
 127
 128         switch(tp.get_before())
 129         {
 130         case INTERPOLATION_TCB:
 131                 window->draw_arc(
 132                         gc,
 133                         true,
 134                         area.get_x(),
 135                         area.get_y(),
 136                         area.get_width(),
 137                         area.get_height(),
 138                         64*90,
 139                         64*180
 140                 );
 141                 gc->set_rgb_fg_color(black);
 142                 window->draw_arc(
 143                         gc,
 144                         false,
 145                         area.get_x(),
 146                         area.get_y(),
 147                         area.get_width(),
 148                         area.get_height(),
 149                         64*90,
 150                         64*180
 151                 );
 152                 break;
 153
 154         case INTERPOLATION_HALT:
 155                 window->draw_arc(
 156                         gc,
 157                         true,
 158                         area.get_x(),
 159                         area.get_y(),
 160                         area.get_width(),
 161                         area.get_height()*2,
 162                         64*90,
 163                         64*90
 164                 );
 165                 gc->set_rgb_fg_color(black);
 166                 window->draw_arc(
 167                         gc,
 168                         false,
 169                         area.get_x(),
 170                         area.get_y(),
 171                         area.get_width(),
 172                         area.get_height()*2,
 173                         64*90,
 174                         64*90
 175                 );
 176                 break;
 177
 178         case INTERPOLATION_LINEAR:
 179                 points.clear();
 180                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 181                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()));
 182                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 183                 window->draw_polygon(gc,true,points);
 184                 gc->set_rgb_fg_color(black);
 185                 window->draw_lines(gc,points);
 186                 break;
 187
 188         case INTERPOLATION_CONSTANT:
 189                 points.clear();
 190                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 191                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/4,area.get_y()));
 192                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/4,area.get_y()+area.get_height()/2));
 193                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()/2));
 194                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()));
 195                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 196                 window->draw_polygon(gc,true,points);
 197                 gc->set_rgb_fg_color(black);
 198                 window->draw_lines(gc,points);
 199                 break;
 200
 201         case INTERPOLATION_UNDEFINED: default:
 202                 points.clear();
 203                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 204                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/3,area.get_y()));
 205                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()/3));
 206                 points.push_back(Gdk::Point(area.get_x(),area.get_y()+area.get_height()*2/3));
 207                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/3,area.get_y()+area.get_height()));
 208                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 209                 window->draw_polygon(gc,true,points);
 210                 gc->set_rgb_fg_color(black);
 211                 window->draw_lines(gc,points);
 212                 break;
 213         }
 214
 215 /*-     AFTER -------------------------------------- */
 216
 217         color=get_interp_color(tp.get_after());
 218         color=color_darken(color,0.8f);
 219         if(selected)color=color_darken(color,1.3f);
 220         gc->set_rgb_fg_color(color);
 221
 222
 223         switch(tp.get_after())
 224         {
 225         case INTERPOLATION_TCB:
 226                 window->draw_arc(
 227                         gc,
 228                         true,
 229                         area.get_x(),
 230                         area.get_y(),
 231                         area.get_width(),
 232                         area.get_height(),
 233                         64*270,
 234                         64*180
 235                 );
 236                 gc->set_rgb_fg_color(black);
 237                 window->draw_arc(
 238                         gc,
 239                         false,
 240                         area.get_x(),
 241                         area.get_y(),
 242                         area.get_width(),
 243                         area.get_height(),
 244                         64*270,
 245                         64*180
 246                 );
 247                 break;
 248
 249         case INTERPOLATION_HALT:
 250                 window->draw_arc(
 251                         gc,
 252                         true,
 253                         area.get_x(),
 254                         area.get_y()-area.get_height(),
 255                         area.get_width(),
 256                         area.get_height()*2,
 257                         64*270,
 258                         64*90
 259                 );
 260                 gc->set_rgb_fg_color(black);
 261                 window->draw_arc(
 262                         gc,
 263                         false,
 264                         area.get_x(),
 265                         area.get_y()-area.get_height(),
 266                         area.get_width(),
 267                         area.get_height()*2,
 268                         64*270,
 269                         64*90
 270                 );
 271                 break;
 272
 273         case INTERPOLATION_LINEAR:
 274                 points.clear();
 275                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 276                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()));
 277                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 278                 window->draw_polygon(gc,true,points);
 279                 gc->set_rgb_fg_color(black);
 280                 window->draw_lines(gc,points);
 281                 break;
 282
 283         case INTERPOLATION_CONSTANT:
 284                 points.clear();
 285                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 286                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()));
 287                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()+area.get_height()/2));
 288                 points.push_back(Gdk::Point(area.get_x()+area.get_width()*3/4,area.get_y()+area.get_height()/2));
 289                 points.push_back(Gdk::Point(area.get_x()+area.get_width()*3/4,area.get_y()+area.get_height()));
 290                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 291                 window->draw_polygon(gc,true,points);
 292                 gc->set_rgb_fg_color(black);
 293                 window->draw_lines(gc,points);
 294                 break;
 295
 296         case INTERPOLATION_UNDEFINED: default:
 297                 points.clear();
 298                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()));
 299                 points.push_back(Gdk::Point(area.get_x()+area.get_width()*2/3,area.get_y()));
 300                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()+area.get_height()/3));
 301                 points.push_back(Gdk::Point(area.get_x()+area.get_width(),area.get_y()+area.get_height()*2/3));
 302                 points.push_back(Gdk::Point(area.get_x()+area.get_width()*2/3,area.get_y()+area.get_height()));
 303                 points.push_back(Gdk::Point(area.get_x()+area.get_width()/2,area.get_y()+area.get_height()));
 304                 window->draw_polygon(gc,true,points);
 305                 gc->set_rgb_fg_color(black);
 306                 window->draw_lines(gc,points);
 307                 break;
 308         }
 309
 310 }
 311
 312 /* === M E T H O D S ======================================================= */
 313
 314 /* === E N T R Y P O I N T ================================================= */
 315 double defaultfps = 24;
 316 const int fullheight = 20;
 317
 318 Widget_Timeslider::Widget_Timeslider()
 319 :layout(Pango::Layout::create(get_pango_context())),
 320 adj_default(0,0,2,1/defaultfps,10/defaultfps),
 321 adj_timescale(0),
 322 //invalidated(false),
 323 last_event_time(0),
 324 fps(defaultfps),
 325 dragscroll(false)
 326 {
 327         set_size_request(-1,fullheight);
 328
 329         //                click                    scroll                     zoom
 330         add_events( Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK
 331                                 | Gdk::BUTTON_MOTION_MASK | Gdk::SCROLL_MASK );
 332
 333         set_time_adjustment(&adj_default);
 334         //update_times();
 335 }
 336
 337 Widget_Timeslider::~Widget_Timeslider()
 338 {
 339 }
 340
 341 void Widget_Timeslider::set_time_adjustment(Gtk::Adjustment *x)
 342 {
 343         //disconnect old connections
 344         time_value_change.disconnect();
 345         time_other_change.disconnect();
 346
 347         //connect update function to new adjustment
 348         adj_timescale = x;
 349
 350         if(x)
 351         {
 352                 time_value_change = x->signal_value_changed().connect(sigc::mem_fun(*this,&Widget_Timeslider::queue_draw));
 353                 time_other_change = x->signal_changed().connect(sigc::mem_fun(*this,&Widget_Timeslider::queue_draw));
 354                 //invalidated = true;
 355                 //refresh();
 356         }
 357 }
 358
 359 void Widget_Timeslider::set_global_fps(float d)
 360 {
 361         if(fps != d)
 362         {
 363                 fps = d;
 364
 365                 //update everything since we need to redraw already
 366                 //invalidated = true;
 367                 //refresh();
 368                 queue_draw();
 369         }
 370 }
 371
 372 /*void Widget_Timeslider::update_times()
 373 {
 374         if(adj_timescale)
 375         {
 376                 start = adj_timescale->get_lower();
 377                 end = adj_timescale->get_upper();
 378                 current = adj_timescale->get_value();
 379         }
 380 }*/
 381
 382 void Widget_Timeslider::refresh()
 383 {
 384 }
 385 /*
 386 {
 387         if(invalidated)
 388         {
 389                 queue_draw();
 390         }else if(adj_timescale)
 391         {
 392                 double  l = adj_timescale->get_lower(),
 393                                 u = adj_timescale->get_upper(),
 394                                 v = adj_timescale->get_value();
 395
 396                 bool invalid = (l != start) || (u != end) || (v != current);
 397
 398                 start = l;
 399                 end = u;
 400                 current = v;
 401
 402                 if(invalid) queue_draw();
 403         }
 404 }*/
 405
 406 bool Widget_Timeslider::redraw(bool /*doublebuffer*/)
 407 {
 408         Glib::RefPtr<Gdk::Window> window = get_window();
 409
 410         if(!window) return false;
 411
 412         Glib::RefPtr<Gdk::GC>   gc = Gdk::GC::create(window);
 413         if(!gc) return false;
 414
 415         //synfig::info("Drawing Timeslider");
 416         //clear and update to current values
 417         //invalidated = false;
 418         //update_times();
 419
 420         //draw grey rectangle
 421         Gdk::Color      c("#7f7f7f");
 422         gc->set_rgb_fg_color(c);
 423         gc->set_background(c);
 424
 425         //Get the data for the window and the params to draw it...
 426         int w = get_width(), h = get_height();
 427
 428         window->draw_rectangle(gc,true,0,0,w,h);
 429
 430         const double EPSILON = 1e-6;
 431         if(!adj_timescale || w == 0) return true;
 432
 433         //Get the time information since we now know it's valid
 434         double  start = adj_timescale->get_lower(),
 435                         end = adj_timescale->get_upper(),
 436                         current = adj_timescale->get_value();
 437
 438         if(end-start < EPSILON) return true;
 439
 440         //synfig::info("Drawing Lines");
 441
 442         //draw all the time stuff
 443         double dtdp = (end - start)/get_width();
 444         double dpdt = 1/dtdp;
 445
 446         //lines
 447
 448         //Draw the time line...
 449         double tpx = (current-start)*dpdt;
 450         gc->set_rgb_fg_color(Gdk::Color("#ffaf00"));
 451         window->draw_line(gc,round_to_int(tpx),0,round_to_int(tpx),fullheight);
 452
 453         //normal line/text color
 454         gc->set_rgb_fg_color(Gdk::Color("#333333"));
 455
 456         //draw these lines... (always 5 between) maybe 6?
 457         const int subdiv = 4;
 458
 459         //1h 45 30 20 10 5
 460         //..., 3m, 2m, 1m30s, 1m, 30s, 20s, 10s, 5s, 3s, 2s, 1s, 0.5s
 461         //frames... (how???)
 462         double ranges[] =
 463         { 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 };
 464         //{ 3600, 2700, 1800, 1200, 600, 300, 180, 120, 90, 60, 30, 20, 10, 5, 3, 2, 1, 0.5 };
 465         const int ranges_size = sizeof(ranges)/sizeof(double);
 466
 467         double lowerrange = dtdp*75, upperrange = dtdp*150;
 468         double midrange = (lowerrange + upperrange)/2;
 469
 470         //find most ideal scale
 471         double scale = ranges[0];
 472         {
 473                 double *val = binary_find(ranges, ranges+ranges_size, midrange);
 474                 double *after = val+1;
 475
 476                 if(val >= ranges+ranges_size)
 477                 {
 478                         val = ranges+ranges_size-1;
 479                 }
 480
 481                 if(after >= ranges+ranges_size)
 482                 {
 483                         after = ranges+ranges_size-1;
 484                 }
 485
 486                 scale = *val;
 487
 488                 double diff = abs(scale - midrange), diff2 = abs(*after - midrange);
 489                 if(diff2 < diff)
 490                         scale = *after;
 491         }
 492
 493         //synfig::info("Range found: (l %.2lf,u %.2lf - m %.2lf) -> %.2lf",lowerrange,upperrange,midrange,scale);
 494
 495         //search around this area to get the right one
 496
 497
 498         //get first valid line and its position in pixel space
 499         double time = 0;
 500         double pixel = 0;
 501
 502         int sdindex = 0;
 503
 504         double subr = scale / subdiv;
 505
 506         //get its position inside...
 507         time = ceil(start/subr)*subr - start;
 508         pixel = time*dpdt;
 509
 510         //absolute time of the line to be drawn
 511         time += start;
 512
 513         { //inside the big'n
 514                 double t = (time/scale - floor(time/scale))*subdiv; // the difference from the big mark in 0:1
 515                 //sdindex = (int)floor(t + 0.5); //get how far through the range it is...
 516                 sdindex = round_to_int(t); //get how far through the range it is...
 517
 518                 //synfig::info("Extracted fr %.2lf -> %d", t, sdindex);
 519         }
 520
 521         //synfig::info("Initial values: %.4lf t, %.1lf pixels, %d i", time,pixel,sdindex);
 522
 523         //loop to draw
 524         const int heightbig = 12;
 525         const int heightsmall = 4;
 526
 527         int width = get_width();
 528         while( pixel < width )
 529         {
 530                 int xpx = round_to_int(pixel);
 531
 532                 //draw big
 533                 if(sdindex == 0)
 534                 {
 535                         window->draw_line(gc,xpx,0,xpx,heightbig);
 536                         //round the time to nearest frame and draw the text
 537                         Time tm((double)time);
 538                         if(get_global_fps()) tm.round(get_global_fps());
 539                         Glib::ustring timecode(tm.get_string(get_global_fps(),App::get_time_format()));
 540
 541                         //gc->set_rgb_fg_color(Gdk::Color("#000000"));
 542                         layout->set_text(timecode);
 543                         window->draw_layout(gc,xpx+2,heightsmall,layout);
 544                 }else
 545                 {
 546                         window->draw_line(gc,xpx,0,xpx,heightsmall);
 547                 }
 548
 549                 //increment time and position
 550                 pixel += subr / dtdp;
 551                 time += subr;
 552
 553                 //increment index
 554                 if(++sdindex >= subdiv) sdindex -= subdiv;
 555         }
 556
 557         return true;
 558 }
 559
 560 bool Widget_Timeslider::on_motion_notify_event(GdkEventMotion* event) //for dragging
 561 {
 562         if(!adj_timescale) return false;
 563
 564         Gdk::ModifierType mod = Gdk::ModifierType(event->state);
 565
 566         //scrolling...
 567
 568         //NOTE: we might want to address the possibility of dragging with both buttons held down
 569
 570         if(mod & Gdk::BUTTON2_MASK)
 571         {
 572
 573                 //we need this for scrolling by dragging
 574                 double  curx = event->x;
 575
 576                 double  start = adj_timescale->get_lower(),
 577                                 end = adj_timescale->get_upper();
 578
 579
 580                 if(dragscroll)
 581                 {
 582                         if(event->time-last_event_time<30)
 583                                 return false;
 584                         else
 585                                 last_event_time=event->time;
 586
 587                         if(abs(lastx - curx) < 1 && end != start) return true;
 588                         //translate the window and correct it
 589
 590                         //update our stuff so we are operating correctly
 591                         //invalidated = true;
 592                         //update_times();
 593
 594                         //Note: Use inverse of mouse movement because of conceptual space relationship
 595                         double diff = lastx - curx; //curx - lastx;
 596
 597                         //NOTE: This might be incorrect...
 598                         //fraction to move...
 599                         double dpx = (end - start)/get_width();
 600                         lastx = curx;
 601
 602                         diff *= dpx;
 603
 604                         //Adjust...
 605                         start += diff;
 606                         end += diff;
 607
 608                         //But clamp to bounds if they exist...
 609                         //HACK - bounds should not be required for this slider
 610                         if(adj_bounds)
 611                         {
 612                                 if(start < adj_bounds->get_lower())
 613                                 {
 614                                         diff = adj_bounds->get_lower() - start;
 615                                         start += diff;
 616                                         end += diff;
 617                                 }
 618
 619                                 if(end > adj_bounds->get_upper())
 620                                 {
 621                                         diff = adj_bounds->get_upper() - end;
 622                                         start += diff;
 623                                         end += diff;
 624                                 }
 625                         }
 626
 627                         //synfig::info("Scrolling timerange to (%.4f,%.4f)",start,end);
 628
 629                         adj_timescale->set_lower(start);
 630                         adj_timescale->set_upper(end);
 631
 632                         adj_timescale->changed();
 633                 }else
 634                 {
 635                         dragscroll = true;
 636                         lastx = curx;
 637                         //lasty = cury;
 638                 }
 639
 640                 return true;
 641         }
 642
 643         if(mod & Gdk::BUTTON1_MASK)
 644         {
 645                 double curx = event->x;
 646
 647                 //get time from drag...
 648                 double  start = adj_timescale->get_lower(),
 649                                 end = adj_timescale->get_upper(),
 650                                 current = adj_timescale->get_value();
 651                 double t = start + curx*(end - start)/get_width();
 652
 653                 //snap it to fps - if they exist...
 654                 if(fps)
 655                 {
 656                         t = floor(t*fps + 0.5)/fps;
 657                 }
 658
 659                 //set time if needed
 660                 if(current != t)
 661                 {
 662                         adj_timescale->set_value(t);
 663
 664                         //Fixed this to actually do what it's supposed to...
 665                         if(event->time-last_event_time>50)
 666                         {
 667                                 adj_timescale->value_changed();
 668                                 last_event_time = event->time;
 669                         }
 670                 }
 671
 672                 return true;
 673         }
 674
 675         return false;
 676 }
 677
 678 bool Widget_Timeslider::on_scroll_event(GdkEventScroll* event) //for zooming
 679 {
 680         if(!adj_timescale) return false;
 681
 682         //Update so we are calculating based on current values
 683         //update_times();
 684
 685         //figure out if we should center ourselves on the current time
 686         bool center = false;
 687
 688         //we want to zoom in on the time value if control is held down
 689         if(Gdk::ModifierType(event->state) & Gdk::CONTROL_MASK)
 690         {
 691                 center = true;
 692         }
 693
 694         switch(event->direction)
 695         {
 696                 case GDK_SCROLL_UP: //zoom in
 697                 {
 698                         zoom_in(center);
 699
 700                         return true;
 701                 }
 702                 case GDK_SCROLL_DOWN: //zoom out
 703                 {
 704                         zoom_out(center);
 705
 706                         return true;
 707                 }
 708
 709                 default:
 710                 {
 711                         return false;
 712                 }
 713         }
 714 }
 715
 716 void Widget_Timeslider::zoom_in(bool centerontime)
 717 {
 718         if(!adj_timescale) return;
 719
 720         double  start = adj_timescale->get_lower(),
 721                         end = adj_timescale->get_upper(),
 722                         current = adj_timescale->get_value();
 723
 724         double focuspoint = centerontime ? current : (start + end)/2;
 725
 726         //calculate new beginning and end
 727         end = focuspoint + (end-focuspoint)*zoominfactor;
 728         start = focuspoint + (start-focuspoint)*zoominfactor;
 729
 730         //synfig::info("Zooming in timerange to (%.4f,%.4f)",start,end);
 731         if(adj_bounds)
 732         {
 733                 if(start < adj_bounds->get_lower())
 734                 {
 735                         start = adj_bounds->get_lower();
 736                 }
 737
 738                 if(end > adj_bounds->get_upper())
 739                 {
 740                         end = adj_bounds->get_upper();
 741                 }
 742         }
 743
 744         //reset values
 745         adj_timescale->set_lower(start);
 746         adj_timescale->set_upper(end);
 747
 748         //call changed function
 749         adj_timescale->changed();
 750 }
 751
 752 void Widget_Timeslider::zoom_out(bool centerontime)
 753 {
 754         if(!adj_timescale) return;
 755
 756         double  start = adj_timescale->get_lower(),
 757                         end = adj_timescale->get_upper(),
 758                         current = adj_timescale->get_value();
 759
 760         double focuspoint = centerontime ? current : (start + end)/2;
 761
 762         //calculate new beginning and end
 763         end = focuspoint + (end-focuspoint)*zoomoutfactor;
 764         start = focuspoint + (start-focuspoint)*zoomoutfactor;
 765
 766         //synfig::info("Zooming out timerange to (%.4f,%.4f)",start,end);
 767         if(adj_bounds)
 768         {
 769                 if(start < adj_bounds->get_lower())
 770                 {
 771                         start = adj_bounds->get_lower();
 772                 }
 773
 774                 if(end > adj_bounds->get_upper())
 775                 {
 776                         end = adj_bounds->get_upper();
 777                 }
 778         }
 779
 780         //reset values
 781         adj_timescale->set_lower(start);
 782         adj_timescale->set_upper(end);
 783
 784         //call changed function
 785         adj_timescale->changed();
 786 }
 787
 788 bool Widget_Timeslider::on_button_press_event(GdkEventButton *event) //for clicking
 789 {
 790         switch(event->button)
 791         {
 792                 //time click...
 793                 case 1:
 794                 {
 795                         double  start = adj_timescale->get_lower(),
 796                                         end = adj_timescale->get_upper(),
 797                                         current = adj_timescale->get_value();
 798
 799                         double w = get_width();
 800                         double t = start + (end - start) * event->x / w;
 801
 802                         t = floor(t*fps + 0.5)/fps;
 803
 804                         /*synfig::info("Clicking time from %.3lf to %.3lf [(%.2lf,%.2lf) %.2lf / %.2lf ... %.2lf",
 805                                                 current, vt, start, end, event->x, w, fps);*/
 806
 807                         if(t != current)
 808                         {
 809                                 current = t;
 810
 811                                 if(adj_timescale)
 812                                 {
 813                                         adj_timescale->set_value(current);
 814                                         adj_timescale->value_changed();
 815                                 }
 816                         }
 817
 818                         break;
 819                 }
 820
 821                 //scroll click
 822                 case 2:
 823                 {
 824                         //start dragging
 825                         dragscroll = true;
 826                         lastx = event->x;
 827                         //lasty = event->y;
 828
 829                         return true;
 830                 }
 831
 832                 default:
 833                 {
 834                         break;
 835                 }
 836         }
 837
 838         return false;
 839 }
 840
 841 bool Widget_Timeslider::on_button_release_event(GdkEventButton *event) //end drag
 842 {
 843         switch(event->button)
 844         {
 845                 case 2:
 846                 {
 847                         //start dragging
 848                         dragscroll = false;
 849                         return true;
 850                 }
 851
 852                 default:
 853                 {
 854                         break;
 855                 }
 856         }
 857
 858         return false;
 859 }