Allow PasteCanvas layers with unset canvas parameters to be exported.
[synfig.git] / 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 }