gtk2_ardour/imageframe_view.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 #include <cmath>
  22
  23 #include <gtkmm.h>
  24 #include <gtkmm2ext/gtk_ui.h>
  25
  26 #include "imageframe_time_axis.h"
  27 #include "imageframe_time_axis_group.h"
  28 #include "marker_time_axis.h"
  29 #include "marker_time_axis_view.h"
  30 #include "public_editor.h"
  31 #include "utils.h"
  32 #include "imageframe_view.h"
  33 #include "imageframe.h"
  34 #include "canvas_impl.h"
  35 #include "gui_thread.h"
  36
  37 using namespace ARDOUR;
  38 using namespace Gtk;
  39
  40 sigc::signal<void,ImageFrameView*> ImageFrameView::GoingAway;
  41
  42 /**
  43  * Constructs a new ImageFrameView upon the canvas
  44  *
  45  * @param item_id unique id of this item
  46  * @param parent the parent canvas item
  47  * @param tv the time axis view that this item is to be placed upon
  48  * @param group the ImageFrameGroup that this item is a member of
  49  * @param spu the current samples per canvas unit
  50  * @param start the start frame ogf this item
  51  * @param duration the duration of this item
  52  * @param rgb_data the rgb data of the image
  53  * @param width the width of the original rgb_data image data
  54  * @param height the width of the origianl rgb_data image data
  55  * @param num_channels the number of color channels within rgb_data
  56  */
  57 ImageFrameView::ImageFrameView(const string & item_id,
  58         ArdourCanvas::Group *parent,
  59         ImageFrameTimeAxis* tv,
  60         ImageFrameTimeAxisGroup* item_group,
  61         double spu,
  62        Gdk::Color& basic_color,
  63         nframes_t start,
  64         nframes_t duration,
  65         unsigned char* rgb_data,
  66         uint32_t width,
  67         uint32_t height,
  68         uint32_t num_channels)
  69   : TimeAxisViewItem(item_id, *parent, *tv, spu, basic_color, start, duration,
  70                      TimeAxisViewItem::Visibility (TimeAxisViewItem::ShowNameText|
  71                                                    TimeAxisViewItem::ShowNameHighlight|
  72                                                    TimeAxisViewItem::ShowFrame|
  73                                                    TimeAxisViewItem::ShowHandles))
  74
  75 {
  76         the_parent_group = item_group;
  77         set_name_text(item_id);
  78
  79         image_data_width = width;
  80         image_data_height = height;
  81         image_data_num_channels = num_channels;
  82
  83         //This should be art_free'd once the ArtPixBuf is destroyed - this should happen when we destroy the imageframe canvas item
  84         unsigned char* the_rgb_data = (unsigned char*) art_alloc(width*height*num_channels);
  85         memcpy(the_rgb_data, rgb_data, (width*height*num_channels));
  86
  87         ArtPixBuf* pbuf;
  88         pbuf = art_pixbuf_new_rgba(the_rgb_data, width, height, (num_channels * width));
  89         imageframe = 0;
  90
  91         //calculate our image width based on the track height
  92         double im_ratio = (double)width/(double)height;
  93         double im_width = ((double)(trackview.current_height() - TimeAxisViewItem::NAME_HIGHLIGHT_SIZE) * im_ratio);
  94
  95         imageframe = new ImageFrame (*group, pbuf, 1.0, 1.0, ANCHOR_NW, im_width, (trackview.current_height() - TimeAxisViewItem::NAME_HIGHLIGHT_SIZE));
  96
  97         frame_handle_start->signal_event().connect (sigc::bind (sigc::mem_fun (trackview.editor, &PublicEditor::canvas_imageframe_start_handle_event), frame_handle_start, this));
  98         frame_handle_end->signal_event().connect (sigc::bind (sigc::mem_fun (trackview.editor, &PublicEditor::canvas_imageframe_end_handle_event), frame_handle_end, this));
  99         group->signal_event().connect (sigc::bind (sigc::mem_fun (trackview.editor, &PublicEditor::canvas_imageframe_item_view_event), imageframe, this));
 100
 101         frame_handle_start->raise_to_top();
 102         frame_handle_end->raise_to_top();
 103
 104         set_position(start, this);
 105         set_duration(duration, this);
 106
 107         MarkerView::CatchDeletion.connect (*this, ui_bind (&ImageFrameView::remove_marker_view_item, this, _1), gui_context());
 108 }
 109
 110 /**
 111  * Destructor
 112  * Reposible for removing and destroying all marker items associated with this item
 113  */
 114 ImageFrameView::~ImageFrameView()
 115 {
 116         CatchDeletion (this);
 117
 118         // destroy any marker items we have associated with this item
 119
 120         for(MarkerViewList::iterator iter = marker_view_list.begin(); iter != marker_view_list.end(); ++iter)
 121         {
 122                 MarkerView* mv = (*iter);
 123
 124                 MarkerViewList::iterator next = iter;
 125                 next++;
 126
 127                 // remove the item from our marker list
 128                 // the current iterator becomes invalid after this point, so we cannot call next upon it
 129                 // luckily enough, we already have next
 130                 marker_view_list.erase(iter);
 131
 132                 // remove the item from the marker time axis
 133                 MarkerTimeAxisView* mtav = dynamic_cast<MarkerTimeAxis*>(&mv->get_time_axis_view())->get_view();
 134                 if(mtav)
 135                 {
 136                         mtav->remove_marker_view(mv, this);
 137                 }
 138
 139                 mv->set_marked_item(0);
 140                 delete mv;
 141                 mv = 0;
 142
 143                 // set our iterator to next, as we have invalided the current iterator with the call to erase
 144                 iter = next;
 145         }
 146
 147         // if we are the currently selected item withi the parent track, we need to se-select
 148         if(the_parent_group)
 149         {
 150                 if(the_parent_group->get_view().get_selected_imageframe_view() == this)
 151                 {
 152                         the_parent_group->get_view().clear_selected_imageframe_item(false);
 153                 }
 154         }
 155
 156         delete imageframe;
 157         imageframe = 0;
 158 }
 159
 160
 161 //---------------------------------------------------------------------------------------//
 162 // Position and duration Accessors/Mutators
 163
 164 /**
 165  * Set the position of this item to the specified value
 166  *
 167  * @param pos the new position
 168  * @param src the identity of the object that initiated the change
 169  * @return true if the position change was a success, false otherwise
 170  */
 171 bool
 172 ImageFrameView::set_position(framepos_t pos, void* src, double* delta)
 173 {
 174         framepos_t old_pos = frame_position;
 175
 176         // do the standard stuff
 177         bool ret = TimeAxisViewItem::set_position(pos, src, delta);
 178
 179         // everything went ok with the standard stuff?
 180         if (ret) {
 181                 /* move each of our associated markers with this ImageFrameView */
 182                 for (MarkerViewList::iterator i = marker_view_list.begin(); i != marker_view_list.end(); ++i)
 183                 {
 184                         // calculate the offset of the marker
 185                         MarkerView* mv = (MarkerView*)*i;
 186                         framepos_t marker_old_pos = mv->get_position();
 187
 188                         mv->set_position(pos + (marker_old_pos - old_pos), src);
 189                 }
 190         }
 191
 192         return(ret);
 193 }
 194
 195 /**
 196  * Sets the duration of this item
 197  *
 198  * @param dur the new duration of this item
 199  * @param src the identity of the object that initiated the change
 200  * @return true if the duration change was succesful, false otherwise
 201  */
 202 bool
 203 ImageFrameView::set_duration(framepos_t dur, void* src)
 204 {
 205         /* do the standard stuff */
 206         bool ret = TimeAxisViewItem::set_duration(dur, src);
 207
 208         // eveything went ok with the standard stuff?
 209         if(ret)
 210         {
 211                 /* handle setting the sizes of our canvas itesm based on the new duration */
 212                 imageframe->property_drawwidth() = trackview.editor.frame_to_pixel(get_duration());
 213         }
 214
 215         return(ret);
 216 }
 217
 218 //---------------------------------------------------------------------------------------//
 219 // Parent Component Methods
 220
 221 /**
 222  * Sets the parent ImageFrameTimeAxisGroup of thie item
 223  * each Item must be part of exactly one group (or 'scene') upon the timeline
 224  *
 225  * @param group the new parent group
 226  */
 227 void
 228 ImageFrameView::set_time_axis_group(ImageFrameTimeAxisGroup* group)
 229 {
 230         the_parent_group = group;
 231 }
 232
 233 /**
 234  * Returns the parent group of this item
 235  *
 236  * @return the parent group of this item
 237  */
 238 ImageFrameTimeAxisGroup*
 239 ImageFrameView::get_time_axis_group()
 240 {
 241         return(the_parent_group);
 242 }
 243
 244
 245 //---------------------------------------------------------------------------------------//
 246 // ui methods
 247
 248 /**
 249  * Set the height of this item
 250  *
 251  * @param h the new height
 252  */
 253 void
 254 ImageFrameView::set_height (gdouble h)
 255 {
 256         // set the image size
 257         // @todo might have to re-get the image data, for a large height...hmmm.
 258         double im_ratio = (double)image_data_width/(double)image_data_height;
 259
 260         imageframe->property_width() = (h - TimeAxisViewItem::NAME_Y_OFFSET) * im_ratio;
 261         imageframe->property_height() = h - TimeAxisViewItem::NAME_Y_OFFSET;
 262
 263         frame->raise_to_top();
 264         imageframe->raise_to_top();
 265         name_highlight->raise_to_top();
 266         name_pixbuf->raise_to_top();
 267         frame_handle_start->raise_to_top();
 268         frame_handle_end->raise_to_top();
 269
 270         name_pixbuf->property_y() = h - TimeAxisViewItem::NAME_Y_OFFSET;
 271         frame->property_y2() = h;
 272
 273         name_highlight->property_y1() = (gdouble) h - TimeAxisViewItem::NAME_HIGHLIGHT_SIZE;
 274         name_highlight->property_y2() = (gdouble) h - 1.0;
 275 }
 276
 277
 278 //---------------------------------------------------------------------------------------//
 279 // MarkerView methods
 280
 281 /**
 282  * Adds a markerView to the list of marker views associated with this item
 283  *
 284  * @param item the marker item to add
 285  * @param src the identity of the object that initiated the change
 286  */
 287 void
 288 ImageFrameView::add_marker_view_item(MarkerView* item, void* src)
 289 {
 290         marker_view_list.push_back(item);
 291          MarkerViewAdded(item, src); /* EMIT_SIGNAL */
 292 }
 293
 294 /**
 295  * Removes the named marker view from the list of marker view associated with this item
 296  * The Marker view is not destroyed on removal, so the caller must handle the item themself
 297  *
 298  * @param markId the id/name of the item to remove
 299  * @param src the identity of the object that initiated the change
 300  * @return the removed marker item
 301  */
 302 MarkerView*
 303 ImageFrameView::remove_named_marker_view_item(const string & markerId, void* src)
 304 {
 305         MarkerView* mv = 0;
 306         MarkerViewList::iterator i = marker_view_list.begin();
 307
 308         while(i != marker_view_list.end())
 309         {
 310                 if (((MarkerView*)*i)->get_item_name() == markerId)
 311                 {
 312                         mv = (*i);
 313
 314                         marker_view_list.erase(i);
 315
 316                          MarkerViewRemoved(mv,src); /* EMIT_SIGNAL */
 317
 318                         // iterator is now invalid, but since we should only ever have
 319                         // one item with the specified name, things are ok, and we can
 320                         // break from the while loop
 321                         break;
 322                 }
 323                 i++;
 324         }
 325
 326         return(mv);
 327 }
 328
 329 /**
 330  * Removes item from the list of marker views assocaited with this item
 331  * This method will do nothing if item if not assiciated with this item
 332  *
 333  * @param item the item to remove
 334  * @param src the identity of the object that initiated the change
 335  */
 336 void
 337 ImageFrameView::remove_marker_view_item (MarkerView* mv)
 338 {
 339         ENSURE_GUI_THREAD (*this, &ImageFrameView::remove_marker_view_item, mv, src)
 340
 341         MarkerViewList::iterator i;
 342
 343         if ((i = find (marker_view_list.begin(), marker_view_list.end(), mv)) != marker_view_list.end()) {
 344                 marker_view_list.erase(i);
 345                 MarkerViewRemoved (mv, src); /* EMIT_SIGNAL */
 346         }
 347 }
 348
 349 /**
 350  * Determines if the named marker is one of those associated with this item
 351  *
 352  * @param markId the id/name of the item to search for
 353  */
 354 bool
 355 ImageFrameView::has_marker_view_item(const string & mname)
 356 {
 357         bool result = false;
 358
 359         for (MarkerViewList::const_iterator ci = marker_view_list.begin(); ci != marker_view_list.end(); ++ci)
 360         {
 361                 if (((MarkerView*)*ci)->get_item_name() == mname)
 362                 {
 363                         result = true;
 364
 365                         // found the item, so we can break the for loop
 366                         break;
 367                 }
 368         }
 369
 370         return(result);
 371 }