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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file dock_navigator.cpp
   3 **      \brief Dock Nagivator File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., 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 "dock_navigator.h"
  34 #include "canvasview.h"
  35 #include "workarea.h"
  36
  37 #include <cassert>
  38 #include <synfig/canvas.h>
  39 #include <synfig/context.h>
  40 #include <synfig/target_scanline.h>
  41 #include <synfig/surface.h>
  42
  43 #include <gtkmm/separator.h>
  44
  45 #include "asyncrenderer.h"
  46
  47 #endif
  48
  49 /* === U S I N G =========================================================== */
  50
  51 using namespace std;
  52 using namespace etl;
  53 using namespace synfig;
  54
  55 /* === M A C R O S ========================================================= */
  56
  57 const double log_10_2 = log(2.0);
  58
  59 /* === G L O B A L S ======================================================= */
  60
  61 /* === P R O C E D U R E S ================================================= */
  62
  63 /* === M E T H O D S ======================================================= */
  64
  65 /* === E N T R Y P O I N T ================================================= */
  66 studio::Widget_NavView::Widget_NavView(CanvasView::LooseHandle cv)
  67 :canvview(cv),
  68 adj_zoom(0,-4,4,1,2),
  69 scrolling(false),
  70 surface(new synfig::Surface)
  71 {
  72         attach(drawto,0,4,0,1);
  73
  74         attach(*manage(new Gtk::HSeparator),0,4,1,2,Gtk::SHRINK|Gtk::FILL,Gtk::SHRINK|Gtk::FILL);
  75
  76         //zooming stuff
  77         attach(zoom_print,0,1,2,3,Gtk::SHRINK|Gtk::FILL,Gtk::SHRINK|Gtk::FILL);
  78         zoom_print.set_size_request(40,-1);
  79
  80         Gtk::HScale *s = manage(new Gtk::HScale(adj_zoom));
  81         s->set_draw_value(false);
  82         //s->set_update_policy(Gtk::UPDATE_DELAYED);
  83         //s->signal_event().connect(sigc::mem_fun(*this,&Dock_Navigator::on_scroll_event));
  84         attach(*s,1,4,2,3,Gtk::EXPAND|Gtk::FILL,Gtk::SHRINK|Gtk::FILL);
  85
  86         show_all();
  87
  88         adj_zoom.signal_value_changed().connect(sigc::mem_fun(*this,&Widget_NavView::on_number_modify));
  89
  90         if(cv)
  91         {
  92                 drawto.signal_expose_event().connect(sigc::mem_fun(*this,&Widget_NavView::on_expose_draw));
  93                 drawto.signal_event().connect(sigc::mem_fun(*this,&Widget_NavView::on_mouse_event));
  94
  95                 drawto.add_events(Gdk::BUTTON_MOTION_MASK|Gdk::BUTTON_PRESS_MASK);
  96
  97                 //get_canvas_view()->canvas_interface()->signal_dirty_preview()
  98                 //                              .connect(sigc::mem_fun(*this,&Widget_NavView::on_dirty_preview));
  99                 get_canvas_view()->work_area->signal_rendering()
 100                                                 .connect(sigc::mem_fun(*this,&Widget_NavView::on_dirty_preview));
 101
 102                 get_canvas_view()->work_area->signal_view_window_changed()
 103                                                 .connect(sigc::mem_fun(*this,&Widget_NavView::on_workarea_view_change));
 104
 105                 //update with this canvas' view
 106                 on_workarea_view_change();
 107
 108                 dirty = true;
 109                 queue_draw();
 110         }
 111
 112         adj_zoom.set_value(0);
 113 }
 114
 115 studio::Widget_NavView::~Widget_NavView()
 116 {
 117 }
 118
 119
 120 static void freegu8(const guint8 *p)
 121 {
 122         delete [] p;
 123 }
 124
 125 void studio::Widget_NavView::on_start_render()
 126 {
 127         if(dirty)
 128         {
 129                 //synfig::warning("Nav: Starting render");
 130                 //synfig::warning("Nav: Rendering canvas");
 131                 etl::handle<Target_Scanline>    targ = surface_target(surface.get());
 132
 133                 targ->set_canvas(get_canvas_view()->get_canvas());
 134                 targ->set_remove_alpha();
 135                 targ->set_avoid_time_sync();
 136                 targ->set_quality(get_canvas_view()->get_work_area()->get_quality());
 137                 //synfig::info("Set the quality level to: %d", get_canvas_view()->get_work_area()->get_quality());
 138
 139                 //this should set it to render a single frame
 140                 RendDesc        r = get_canvas_view()->get_canvas()->rend_desc();
 141                 r.set_time(get_canvas_view()->canvas_interface()->get_time());
 142
 143                 //this changes the size of the canvas to the closest thing we can find
 144                 int sw = r.get_w(), sh = r.get_h();
 145
 146                 //synfig::warning("Nav: source image is %d x %d", sw,sh);
 147
 148                 //resize so largest dimension is 128
 149                 int dw = sw > sh ? 128 : sw*128/sh,
 150                         dh = sh > sw ? 128 : sh*128/sw;
 151
 152                 //synfig::warning("Nav: dest image is %d x %d", dw,dh);
 153
 154                 r.set_w(dw);
 155                 r.set_h(dh);
 156
 157                 //get the pw and ph
 158                 //float pw = r.get_pw();
 159                 //float ph = r.get_ph();
 160
 161                 //synfig::warning("Nav: pixel size is %f x %f", pw,ph);
 162
 163                 //this renders that single frame
 164                 targ->set_rend_desc(&r);
 165
 166                 //synfig::warning("Nav: Building async renderer and starting it...");
 167
 168                 renderer = new AsyncRenderer(targ);
 169                 renderer->signal_success().connect(sigc::mem_fun(*this,&Widget_NavView::on_finish_render));
 170                 dirty = false;
 171                 renderer->start();
 172         }
 173 }
 174
 175 void studio::Widget_NavView::on_finish_render()
 176 {
 177         //convert it into our pixmap
 178         PixelFormat pf(PF_RGB);
 179
 180         //synfig::warning("Nav: It hath succeeded!!!");
 181
 182         //assert(renderer && renderer->has_success());
 183         DEBUGPOINT();
 184         //synfig::warning("Nav: now we know it really succeeded");
 185         if(!*surface)
 186         {
 187                 synfig::warning("dock_navigator: Bad surface");
 188                 return;
 189         }
 190
 191         int w = 0, h = 0;
 192         int dw = surface->get_w();
 193         int dh = surface->get_h();
 194
 195         if(prev)
 196         {
 197                 w = prev->get_width();
 198                 h = prev->get_height();
 199         }
 200
 201         if(w != dw || h != dh || !prev)
 202         {
 203                 const int total_bytes(dw*dh*synfig::channels(pf));
 204
 205                 //synfig::warning("Nav: Updating the pixbuf to be the right size, etc. (%d bytes)", total_bytes);
 206
 207                 prev.clear();
 208                 guint8 *bytes = new guint8[total_bytes]; //24 bits per pixel
 209
 210                 //convert into our buffered dataS
 211                 //synfig::warning("Nav: converting color format into buffer");
 212                 convert_color_format((unsigned char *)bytes, (*surface)[0], dw*dh, pf, App::gamma);
 213
 214                 prev =
 215                 Gdk::Pixbuf::create_from_data(
 216                         bytes,  // pointer to the data
 217                         Gdk::COLORSPACE_RGB, // the colorspace
 218                         ((pf&PF_A)==PF_A), // has alpha?
 219                         8, // bits per sample
 220                         dw,     // width
 221                         dh,     // height
 222                         dw*synfig::channels(pf), // stride (pitch)
 223                         SigC::slot(freegu8)
 224                 );
 225         }
 226         else
 227         {
 228                 //synfig::warning("Nav: Don't need to resize");
 229                 //convert into our buffered dataS
 230                 //synfig::warning("Nav: converting color format into buffer");
 231                 if(prev) //just in case we're stupid
 232                 {
 233                         convert_color_format((unsigned char *)prev->get_pixels(), (*surface)[0], dw*dh, pf, App::gamma);
 234                 }
 235         }
 236         queue_draw();
 237 }
 238
 239 /*      zoom slider is on exponential scale
 240
 241         map: -4,4 -> small number,1600 with 100 at 0
 242
 243         f(x) = 100*2^x
 244 */
 245
 246 static double unit_to_zoom(double f)
 247 {
 248         return pow(2.0,f);
 249 }
 250
 251 static double zoom_to_unit(double f)
 252 {
 253         if(f > 0)
 254         {
 255                 return log(f) / log_10_2;
 256         }else return -999999.0;
 257 }
 258
 259 bool studio::Widget_NavView::on_expose_draw(GdkEventExpose */*exp*/)
 260 {
 261         // don't redraw if the previous redraw is still running single-threaded
 262         // or we end up destroying the renderer that's rendering it
 263         if (App::single_threaded && renderer && renderer->updating)
 264                 return false;
 265
 266         //print out the zoom
 267         //HACK kind of...
 268         //zoom_print.set_text(strprintf("%.1f%%",100*unit_to_zoom(adj_zoom.get_value())));
 269
 270         //draw the good stuff
 271         on_start_render();
 272
 273         //if we've got a preview etc. display it...
 274         if(get_canvas_view() && prev)
 275         {
 276                 //axis transform from units to pixel coords
 277                 float xaxis = 0, yaxis = 0;
 278
 279                 int canvw = get_canvas_view()->get_canvas()->rend_desc().get_w();
 280                 //int canvh = get_canvas_view()->get_canvas()->rend_desc().get_h();
 281
 282                 float pw = get_canvas_view()->get_canvas()->rend_desc().get_pw();
 283                 float ph = get_canvas_view()->get_canvas()->rend_desc().get_ph();
 284
 285                 int w = prev->get_width();
 286                 int h = prev->get_height();
 287
 288                 //scale up/down to the nearest pixel ratio...
 289                 //and center in center
 290                 int offx=0, offy=0;
 291
 292                 float sx, sy;
 293                 int nw,nh;
 294
 295                 sx = drawto.get_width() / (float)w;
 296                 sy = drawto.get_height() / (float)h;
 297
 298                 //synfig::warning("Nav redraw: now to scale the bitmap: %.3f x %.3f",sx,sy);
 299
 300                 //round to smallest scale (fit entire thing in window without distortion)
 301                 if(sx > sy) sx = sy;
 302                 //else sy = sx;
 303
 304                 //scaling and stuff
 305                 // the point to navpixel space conversion should be:
 306                 //              (navpixels / canvpixels) * (canvpixels / canvsize)
 307                 //      or (navpixels / prevpixels) * (prevpixels / navpixels)
 308                 xaxis = sx * w / (float)canvw;
 309                 yaxis = xaxis/ph;
 310                 xaxis /= pw;
 311
 312                 //scale to a new pixmap and then copy over to the window
 313                 nw = (int)(w*sx);
 314                 nh = (int)(h*sx);
 315
 316                 //must now center to be cool
 317                 offx = (drawto.get_width() - nw)/2;
 318                 offy = (drawto.get_height() - nh)/2;
 319
 320                 //trivial escape
 321                 if(nw == 0 || nh == 0)return true;
 322
 323                 //draw to drawing area
 324                 Glib::RefPtr<Gdk::GC>   gc = Gdk::GC::create(drawto.get_window());
 325
 326                 //synfig::warning("Nav: Scaling pixmap to off (%d,%d) with size (%d,%d)", offx,offy,nw, nh);
 327                 Glib::RefPtr<Gdk::Pixbuf> scalepx = prev->scale_simple(nw,nh,Gdk::INTERP_NEAREST);
 328
 329                 //synfig::warning("Nav: Drawing scaled bitmap");
 330                 drawto.get_window()->draw_pixbuf(
 331                         gc, //GC
 332                         scalepx, //pixbuf
 333                         0, 0,   // Source X and Y
 334                         offx, offy,     // Dest X and Y
 335                         -1,-1,  // Width and Height
 336                         Gdk::RGB_DITHER_MAX, // RgbDither
 337                         2, 2 // Dither offset X and Y
 338                 );
 339
 340                 //draw fancy red rectangle around focus point
 341                 const Point &wtl = get_canvas_view()->work_area->get_window_tl(),
 342                                         &wbr = get_canvas_view()->work_area->get_window_br();
 343
 344                 gc->set_rgb_fg_color(Gdk::Color("#ff0000"));
 345                 gc->set_line_attributes(2,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
 346
 347                 //it must be clamped to the drawing area though
 348                 int l=0,rw=0,t=0,rh=0;
 349                 const Point fp = -get_canvas_view()->work_area->get_focus_point();
 350
 351                 //get focus point in normal space
 352                 rw = (int)(abs((wtl[0]-wbr[0])*xaxis));
 353                 rh = (int)(abs((wtl[1]-wbr[1])*yaxis));
 354
 355                 //transform into pixel space
 356                 l = (int)(drawto.get_width()/2 + fp[0]*xaxis - rw/2);
 357                 t = (int)(drawto.get_height()/2 + fp[1]*yaxis - rh/2);
 358
 359                 //coord system:
 360                 // tl : (offx,offy)
 361                 // axis multipliers = xaxis,yaxis
 362                 //synfig::warning("Nav: tl (%f,%f), br (%f,%f)", wtl[0],wtl[1],wbr[0],wbr[1]);
 363                 //synfig::warning("Nav: tl (%f,%f), br (%f,%f)", wtl[0],wtl[1],wbr[0],wbr[1]);
 364                 //synfig::warning("Nav: Drawing Rectangle (%d,%d) with dim (%d,%d)", l,t,rw,rh);
 365                 drawto.get_window()->draw_rectangle(gc,false,l,t,rw,rh);
 366         }
 367
 368         return false; //draw everything else too
 369 }
 370
 371 void studio::Widget_NavView::on_dirty_preview()
 372 {
 373         dirty = true;
 374         queue_draw();
 375 }
 376
 377 bool studio::Widget_NavView::on_scroll_event(GdkEvent *event)
 378 {
 379         if(get_canvas_view() && get_canvas_view()->get_work_area())
 380         {
 381                 double z = unit_to_zoom(adj_zoom.get_value());
 382
 383                 switch(event->type)
 384                 {
 385                         case GDK_BUTTON_PRESS:
 386                         {
 387                                 if(event->button.button == 1)
 388                                 {
 389                                         scrolling = true;
 390                                         get_canvas_view()->get_work_area()->set_zoom(z);
 391                                         scrolling = false;
 392                                 }
 393                                 break;
 394                         }
 395
 396                         case GDK_MOTION_NOTIFY:
 397                         {
 398                                 if(Gdk::ModifierType(event->motion.state) & Gdk::BUTTON1_MASK)
 399                                 {
 400                                         scrolling = true;
 401                                         get_canvas_view()->get_work_area()->set_zoom(z);
 402                                         scrolling = false;
 403                                 }
 404                                 break;
 405                         }
 406
 407                         default:
 408                                 break;
 409                 }
 410         }
 411
 412         return false;
 413 }
 414
 415 void studio::Widget_NavView::on_number_modify()
 416 {
 417         double z = unit_to_zoom(adj_zoom.get_value());
 418         zoom_print.set_text(strprintf("%.1f%%",z*100.0));
 419         //synfig::warning("Updating zoom to %f",adj_zoom.get_value());
 420
 421         if(get_canvas_view() && z != get_canvas_view()->get_work_area()->get_zoom())
 422         {
 423                 scrolling = true;
 424                 get_canvas_view()->get_work_area()->set_zoom(z);
 425                 scrolling = false;
 426         }
 427 }
 428
 429 void studio::Widget_NavView::on_workarea_view_change()
 430 {
 431         double wz = get_canvas_view()->get_work_area()->get_zoom();
 432         double z = zoom_to_unit(wz);
 433
 434         //synfig::warning("Updating zoom to %f -> %f",wz,z);
 435         if(!scrolling && z != adj_zoom.get_value())
 436         {
 437                 adj_zoom.set_value(z);
 438                 //adj_zoom.value_changed();
 439         }
 440         queue_draw();
 441 }
 442
 443 bool studio::Widget_NavView::on_mouse_event(GdkEvent * e)
 444 {
 445         Point p;
 446         bool    setpos = false;
 447
 448         if(e->type == GDK_BUTTON_PRESS && e->button.button == 1)
 449         {
 450                 p[0] = e->button.x - drawto.get_width()/2;
 451                 p[1] = e->button.y - drawto.get_height()/2;
 452
 453                 setpos = true;
 454         }
 455
 456         if(e->type == GDK_MOTION_NOTIFY && (Gdk::ModifierType(e->motion.state) & Gdk::BUTTON1_MASK))
 457         {
 458                 p[0] = e->motion.x - drawto.get_width()/2;
 459                 p[1] = e->motion.y - drawto.get_height()/2;
 460
 461                 setpos = true;
 462         }
 463
 464         if(setpos && prev && get_canvas_view())
 465         {
 466                 const Point &tl = get_canvas_view()->get_canvas()->rend_desc().get_tl();
 467                 const Point &br = get_canvas_view()->get_canvas()->rend_desc().get_br();
 468
 469                 float max = abs((br[0]-tl[0]) / drawto.get_width());
 470
 471                 if((float(prev->get_width()) / drawto.get_width()) < (float(prev->get_height()) / drawto.get_height()))
 472                         max = abs((br[1]-tl[1]) / drawto.get_height());
 473
 474                 float signx = (br[0]-tl[0]) < 0 ? -1 : 1;
 475                 float signy = (br[1]-tl[1]) < 0 ? -1 : 1;
 476
 477                 Point pos;
 478
 479                 pos[0] = p[0] * max * signx;
 480                 pos[1] = p[1] * max * signy;
 481
 482                 get_canvas_view()->get_work_area()->set_focus_point(-pos);
 483
 484                 return true;
 485         }
 486
 487         return false;
 488 }
 489
 490 //Navigator Dock Definitions
 491
 492 studio::Dock_Navigator::Dock_Navigator()
 493 :Dock_CanvasSpecific("navigator",_("Navigator"),Gtk::StockID("synfig-navigator"))
 494 {
 495         add(dummy);
 496 }
 497
 498 studio::Dock_Navigator::~Dock_Navigator()
 499 {
 500 }
 501
 502 void studio::Dock_Navigator::changed_canvas_view_vfunc(etl::loose_handle<CanvasView> canvas_view)
 503 {
 504         if(canvas_view)
 505         {
 506                 Widget *v = canvas_view->get_ext_widget("navview");
 507
 508                 if(!v)
 509                 {
 510                         v = new Widget_NavView(canvas_view);
 511                         canvas_view->set_ext_widget("navview",v);
 512                 }
 513
 514                 add(*v);
 515         }else
 516         {
 517                 clear_previous();
 518                 //add(dummy);
 519         }
 520 }