gtk2_ardour/imageframe_time_axis_group.cc

   1 /*
   2     Copyright (C) 2003 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <algorithm>
  21
  22 #include <gtkmm.h>
  23 #include <gtkmm2ext/gtk_ui.h>
  24
  25 #include "imageframe_time_axis_group.h"
  26 #include "imageframe_time_axis_view.h"
  27 #include "imageframe_view.h"
  28 #include "imageframe_time_axis.h"
  29 #include "canvas-simplerect.h"
  30 #include "region_selection.h"
  31 #include "public_editor.h"
  32 #include "gui_thread.h"
  33
  34 #include "i18n.h"
  35
  36 using namespace ARDOUR;
  37
  38 PBD::Signal1<void,ImageFrameTimeAxisGroup*> ImageFrameTimeAxisGroup::CatchDeletion;
  39
  40 //---------------------------------------------------------------------------------------//
  41 // Constructor / Desctructor
  42
  43 /**
  44  * Constructs a new ImageFrameTimeAxisGroup.
  45  *
  46  * @param iftav the parent ImageFrameTimeAxis of this view helper
  47  * @param group_id the unique name/id of this group
  48  */
  49 ImageFrameTimeAxisGroup::ImageFrameTimeAxisGroup(ImageFrameTimeAxisView& iftav, const string & group_id)
  50         : _view_helper(iftav), _group_id(group_id)
  51 {
  52         selected_imageframe_item = 0;
  53         is_selected = false;
  54
  55         ImageFrameView::CatchDeletion.connect (*this, ui_bind (&ImageFrameTimeAxisGroup::remove_imageframe_item, this, _1), gui_context());
  56 }
  57
  58 /**
  59  * Destructor
  60  * Responsible for destroying any Items that may have been added to this group
  61  *
  62  */
  63 ImageFrameTimeAxisGroup::~ImageFrameTimeAxisGroup()
  64 {
  65         // Destroy all the ImageFramViews that we have
  66         for(ImageFrameViewList::iterator iter = imageframe_views.begin(); iter != imageframe_views.end(); ++iter)
  67         {
  68                 ImageFrameView* ifv = *iter;
  69
  70                 ImageFrameViewList::iterator next = iter;
  71                 next++;
  72
  73                 imageframe_views.erase(iter);
  74
  75                 delete ifv;
  76                 ifv = 0;
  77
  78                 iter = next;
  79         }
  80
  81          CatchDeletion; /* EMIT_SIGNAL */
  82 }
  83
  84
  85 //---------------------------------------------------------------------------------------//
  86 // Name/Id Accessors/Mutators
  87
  88 /**
  89  * Set the name/Id of this group.
  90  *
  91  * @param new_name the new name of this group
  92  * @param src the identity of the object that initiated the change
  93  */
  94 void
  95 ImageFrameTimeAxisGroup::set_group_name(const string & new_name, void* src)
  96 {
  97         if(_group_id != new_name)
  98         {
  99                 std::string temp_name = _group_id;
 100                 _group_id = new_name;
 101                  NameChanged(_group_id, temp_name, src); /* EMIT_SIGNAL */
 102         }
 103 }
 104
 105 /**
 106  * Returns the id of this group
 107  * The group id must be unique upon a time axis
 108  *
 109  * @return the id of this group
 110  */
 111 std::string
 112 ImageFrameTimeAxisGroup::get_group_name() const
 113 {
 114         return(_group_id);
 115 }
 116
 117
 118 //---------------------------------------------------------------------------------------//
 119 // ui methods & data
 120
 121 /**
 122  * Sets the height of the time axis view and the item upon it
 123  *
 124  * @param height the new height
 125  */
 126 int
 127 ImageFrameTimeAxisGroup::set_item_heights(gdouble h)
 128 {
 129         /* limit the values to something sane-ish */
 130         if (h < 10.0 || h > 1000.0)
 131         {
 132                 return(-1);
 133         }
 134
 135         // set the heights of all the imaeg frame views within the group
 136         for(ImageFrameViewList::const_iterator citer = imageframe_views.begin(); citer != imageframe_views.end(); ++citer)
 137         {
 138                 (*citer)->set_height(h);
 139         }
 140
 141         return(0);
 142 }
 143
 144 /**
 145  * Sets the current samples per unit.
 146  * this method tells each item upon the time axis of the change
 147  *
 148  * @param spu the new samples per canvas unit value
 149  */
 150 int
 151 ImageFrameTimeAxisGroup::set_item_samples_per_units(gdouble spp)
 152 {
 153         if(spp < 1.0)
 154         {
 155                 return(-1);
 156         }
 157
 158         for(ImageFrameViewList::const_iterator citer = imageframe_views.begin(); citer != imageframe_views.end(); ++citer)
 159         {
 160                 (*citer)->set_samples_per_unit(spp);
 161         }
 162
 163         return(0);
 164 }
 165
 166 /**
 167  * Sets the color of the items contained uopn this view helper
 168  *
 169  * @param color the new base color
 170  */
 171 void
 172 ImageFrameTimeAxisGroup::apply_item_color(Gdk::Color& color)
 173 {
 174         region_color = color;
 175         for(ImageFrameViewList::const_iterator citer = imageframe_views.begin(); citer != imageframe_views.end(); citer++)
 176         {
 177                 (*citer)->set_color (region_color);
 178         }
 179 }
 180
 181
 182
 183 //---------------------------------------------------------------------------------------//
 184 // child ImageFrameView methods
 185
 186 /**
 187  * Adds an ImageFrameView to the list of items upon this time axis view helper
 188  * the new ImageFrameView is returned
 189  *
 190  * @param item_id the unique id of the new item
 191  * @param image_id the id/name of the image data we are usin
 192  * @param start the position the new item should be placed upon the time line
 193  * @param duration the duration the new item should be placed upon the timeline
 194  * @param rgb_data the rgb data of the image
 195  * @param width the original image width of the rgb_data (not the size to display)
 196  * @param height the irigianl height of the rgb_data
 197  * @param num_channels the number of channles within the rgb_data
 198  * @param src the identity of the object that initiated the change
 199  */
 200 ImageFrameView*
 201 ImageFrameTimeAxisGroup::add_imageframe_item(const string & frame_id, framepos_t start, framecnt_t duration, unsigned char* rgb_data, uint32_t width, uint32_t height, uint32_t num_channels, void* src)
 202 {
 203         ImageFrameView* ifv = 0;
 204
 205         //check that there is not already an imageframe with that id
 206         if(get_named_imageframe_item(frame_id) == 0)
 207         {
 208                 ifv = new ImageFrameView(frame_id,
 209                         _view_helper.canvas_item()->property_parent(),
 210                         &(_view_helper.trackview()),
 211                         this,
 212                         _view_helper.trackview().editor.get_current_zoom(),
 213                         region_color,
 214                         start,
 215                         duration,
 216                         rgb_data,
 217                         width,
 218                         height,
 219                         num_channels);
 220
 221                 imageframe_views.push_front(ifv);
 222                 ImageFrameAdded(ifv, src); /* EMIT_SIGNAL */
 223         }
 224
 225         return(ifv);
 226 }
 227
 228
 229 /**
 230  * Returns the named ImageFrameView or 0 if the named view does not exist on this view helper
 231  *
 232  * @param item_id the unique id of the item to search for
 233  * @return the named ImageFrameView, or 0 if it is not held upon this view
 234  */
 235 ImageFrameView*
 236 ImageFrameTimeAxisGroup::get_named_imageframe_item(const string & frame_id)
 237 {
 238         ImageFrameView* ifv =  0;
 239
 240         for (ImageFrameViewList::const_iterator i = imageframe_views.begin(); i != imageframe_views.end(); ++i)
 241         {
 242                 if (((ImageFrameView*)*i)->get_item_name() == frame_id)
 243                 {
 244                         ifv = ((ImageFrameView*)*i);
 245                         break;
 246                 }
 247         }
 248         return(ifv);
 249 }
 250
 251 /**
 252  * Removes the currently selected ImageFrameView
 253  *
 254  * @param src the identity of the object that initiated the change
 255  * @todo need to remoev this, the selected item within group is no longer
 256  *       used in favour of a time axis selected item
 257  * @see add_imageframe_view
 258  */
 259 void
 260 ImageFrameTimeAxisGroup::remove_selected_imageframe_item(void* src)
 261 {
 262         std::string frame_id;
 263
 264         if(selected_imageframe_item)
 265         {
 266                 ImageFrameViewList::iterator i;
 267
 268                 if((i = find(imageframe_views.begin(), imageframe_views.end(), selected_imageframe_item)) != imageframe_views.end())
 269                 {
 270                         imageframe_views.erase(i);
 271                         frame_id = selected_imageframe_item->get_item_name();
 272
 273                         // note that we delete the item here
 274                         delete(selected_imageframe_item);
 275                         selected_imageframe_item = 0;
 276
 277                         std::string track_id = _view_helper.trackview().name();
 278                          ImageFrameRemoved(track_id, _group_id, frame_id, src); /* EMIT_SIGNAL */
 279                 }
 280         }
 281         else
 282         {
 283                 //cerr << "No Selected ImageFrame" << endl;
 284         }
 285 }
 286
 287
 288 /**
 289  * Removes and returns the named ImageFrameView from the list of ImageFrameViews held by this view helper
 290  *
 291  * @param item_id the ImageFrameView unique id to remove
 292  * @param src the identity of the object that initiated the change
 293  * @see add_imageframe_view
 294  */
 295 ImageFrameView*
 296 ImageFrameTimeAxisGroup::remove_named_imageframe_item(const string & frame_id, void* src)
 297 {
 298         ImageFrameView* removed = 0;
 299
 300         for(ImageFrameViewList::iterator iter = imageframe_views.begin(); iter != imageframe_views.end(); ++iter)
 301         {
 302                 ImageFrameView* tempItem = *iter;
 303                 if(tempItem->get_item_name() == frame_id)
 304                 {
 305                         removed = tempItem;
 306                         imageframe_views.erase(iter);
 307
 308                         if (removed == selected_imageframe_item)
 309                         {
 310                                 selected_imageframe_item = 0;
 311                         }
 312
 313                         std::string track_id = _view_helper.trackview().name();
 314                          ImageFrameRemoved(track_id, _group_id, frame_id, src); /* EMIT_SIGNAL */
 315
 316                         // break from the for loop
 317                         break;
 318                 }
 319                 iter++;
 320         }
 321
 322         return(removed);
 323 }
 324
 325 /**
 326  * Removes ifv from the list of ImageFrameViews upon this TimeAxis.
 327  * if ifv is not upon this TimeAxis, this method takes no action
 328  *
 329  * @param ifv the ImageFrameView to remove
 330  */
 331 void
 332 ImageFrameTimeAxisGroup::remove_imageframe_item (ImageFrameView* ifv)
 333 {
 334         ENSURE_GUI_THREAD (*this, &ImageFrameTimeAxisGroup::remove_imageframe_item, ifv, src)
 335
 336         ImageFrameViewList::iterator i;
 337
 338         if((i = find (imageframe_views.begin(), imageframe_views.end(), ifv)) != imageframe_views.end()) {
 339                 imageframe_views.erase(i);
 340
 341                 std::string frame_id = ifv->get_item_name();
 342                 std::string track_id = _view_helper.trackview().name();
 343                  ImageFrameRemoved(track_id, _group_id, frame_id, src); /* EMIT_SIGNAL */
 344         }
 345 }
 346
 347 //---------------------------------------------------------------------------------------//
 348 // Selected group methods
 349
 350 /**
 351  * Sets the currently selected item upon this time axis
 352  *
 353  * @param ifv the item to set selected
 354  */
 355 //void
 356 //ImageFrameTimeAxisGroup::set_selected_imageframe_item(ImageFrameView* ifv)
 357 //{
 358 //      if(selected_imageframe_item)
 359 //      {
 360 //              selected_imageframe_item->set_selected(false, this);
 361 //      }
 362 //
 363 //      selected_imageframe_item = ifv;
 364 //
 365 //      if(!ifv->get_selected())
 366 //      {
 367 //              selected_imageframe_item->set_selected(true, this);
 368 //      }
 369 //}
 370
 371
 372 /**
 373  * Sets the currently selected item upon this time axis to the named item
 374  *
 375  * @param item_id the name/id of the item to set selected
 376  */
 377 //void
 378 //ImageFrameTimeAxisGroup::set_selected_imageframe_item(std::string frame_id)
 379 //{
 380 //      selected_imageframe_item = get_named_imageframe_item(frame_id);
 381 //}
 382
 383
 384 /**
 385  * Returns the currently selected item upon this time axis
 386  *
 387  * @return the currently selected item pon this time axis
 388  */
 389 // ImageFrameView*
 390 // ImageFrameTimeAxisGroup::get_selected_imageframe_item()
 391 // {
 392         // return(selected_imageframe_item);
 393 // }
 394
 395
 396
 397 /**
 398  * Returns whether this grou pis currently selected
 399  *
 400  * @returns true if this group is currently selected
 401  */
 402 bool
 403 ImageFrameTimeAxisGroup::get_selected() const
 404 {
 405         return(is_selected);
 406 }
 407
 408
 409 /**
 410  * Sets he selected state of this group
 411  *
 412  * @param yn set true if this group is selected, false otherwise
 413  */
 414 void
 415 ImageFrameTimeAxisGroup::set_selected(bool yn)
 416 {
 417         is_selected = yn;
 418 }
 419
 420
 421
 422 //---------------------------------------------------------------------------------------//
 423 // Handle time axis removal
 424
 425 /**
 426  * Handles the Removal of this VisualTimeAxis
 427  * This _needs_ to be called to alert others of the removal properly, ie where the source
 428  * of the removal came from.
 429  *
 430  * XXX Although im not too happy about this method of doing things, I cant think of a cleaner method
 431  *     just now to capture the source of the removal
 432  *
 433  * @param src the identity of the object that initiated the change
 434  */
 435 void
 436 ImageFrameTimeAxisGroup::remove_this_group(void* src)
 437 {
 438         /*
 439            defer to idle loop, otherwise we'll delete this object
 440            while we're still inside this function ...
 441         */
 442         Glib::signal_idle().connect(sigc::bind(ptr_fun(&ImageFrameTimeAxisGroup::idle_remove_this_group), this, src));
 443 }
 444
 445 /**
 446  * Callback used to remove this group during the gtk idle loop
 447  * This is used to avoid deleting the obejct while inside the remove_this_group
 448  * method
 449  *
 450  * @param group the ImageFrameTimeAxisGroup to remove
 451  * @param src the identity of the object that initiated the change
 452  */
 453 gint
 454 ImageFrameTimeAxisGroup::idle_remove_this_group(ImageFrameTimeAxisGroup* group, void* src)
 455 {
 456         delete group;
 457         group = 0;
 458          group->GroupRemoved(group->get_group_name(), src); /* EMIT_SIGNAL */
 459         return(false);
 460 }
 461