gtk2_ardour/imageframe_view.h

   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 #ifndef __gtk_ardour_imageframe_view_h__
  21 #define __gtk_ardour_imageframe_view_h__
  22
  23 #include <string>
  24 #include <gdkmm/color.h>
  25 #include <libgnomecanvas/libgnomecanvas.h>
  26 #include <sigc++/signal.h>
  27 #include <list>
  28
  29 #include "canvas.h"
  30 #include "enums.h"
  31 #include "time_axis_view_item.h"
  32 #include "marker_view.h"
  33
  34 class ImageFrameTimeAxis;
  35 class ImageFrameTimeAxisGroup ;
  36
  37 /**
  38  * An ImageFrameItem to display an image upon the ardour time line
  39  *
  40  */
  41 class ImageFrameView : public TimeAxisViewItem
  42 {
  43         public:
  44                 //---------------------------------------------------------------------------------------//
  45                 // Constructor / Desctructor
  46
  47                 /**
  48                  * Constructs a new ImageFrameView upon the canvas
  49                  *
  50                  * @param item_id unique id of this item
  51                  * @param parent the parent canvas item
  52                  * @param tv the time axis view that this item is to be placed upon
  53                  * @param group the ImageFrameGroup that this item is a member of
  54                  * @param spu the current samples per canvas unit
  55                  * @param start the start frame ogf this item
  56                  * @param duration the duration of this item
  57                  * @param rgb_data the rgb data of the image
  58                  * @param width the width of the original rgb_data image data
  59                  * @param height the width of the origianl rgb_data image data
  60                  * @param num_channels the number of color channels within rgb_data
  61                  */
  62                 ImageFrameView(const std::string & item_id,
  63                          ArdourCanvas::Group *parent,
  64                         ImageFrameTimeAxis *tv,
  65                         ImageFrameTimeAxisGroup* group,
  66                         double spu,
  67                         Gdk::Color& base_color,
  68                         nframes_t start,
  69                         nframes_t duration,
  70                         unsigned char* rgb_data,
  71                         uint32_t width,
  72                         uint32_t height,
  73                         uint32_t num_channels) ;
  74
  75                 /**
  76                  * Destructor
  77                  * Reposible for removing and destroying all marker items associated with this item
  78                  */
  79                 ~ImageFrameView() ;
  80
  81                 static sigc::signal<void,ImageFrameView*> GoingAway;
  82
  83                 //---------------------------------------------------------------------------------------//
  84                 // Position and duration Accessors/Mutators
  85
  86                 /**
  87                  * Set the position of this item to the specified value
  88                  *
  89                  * @param pos the new position
  90                  * @param src the identity of the object that initiated the change
  91                  * @return true if the position change was a success, false otherwise
  92                  */
  93                 virtual bool set_position(nframes_t pos, void* src, double* delta = 0) ;
  94
  95                 /**
  96                  * Sets the duration of this item
  97                  *
  98                  * @param dur the new duration of this item
  99                  * @param src the identity of the object that initiated the change
 100                  * @return true if the duration change was succesful, false otherwise
 101                  */
 102                 virtual bool set_duration(nframes_t dur, void* src) ;
 103
 104                 //---------------------------------------------------------------------------------------//
 105                 // Parent Component Methods
 106
 107                 /**
 108                  * Sets the parent ImageFrameTimeAxisGroup of thie item
 109                  * each Item must be part of exactly one group (or 'scene') upon the timeline
 110                  *
 111                  * @param group the new parent group
 112                  */
 113                 void set_time_axis_group(ImageFrameTimeAxisGroup* group) ;
 114
 115                 /**
 116                  * Returns the parent group of this item
 117                  *
 118                  * @return the parent group of this item
 119                  */
 120                 ImageFrameTimeAxisGroup* get_time_axis_group() ;
 121
 122                 //---------------------------------------------------------------------------------------//
 123                 // ui methods
 124
 125                 /**
 126                  * Set the height of this item
 127                  *
 128                  * @param h the new height
 129                  */
 130                 virtual void set_height(gdouble h) ;
 131
 132
 133                 //---------------------------------------------------------------------------------------//
 134                 // MarkerView methods
 135
 136                 /**
 137                  * Adds a markerView to the list of marker views associated with this item
 138                  *
 139                  * @param item the marker item to add
 140                  * @param src the identity of the object that initiated the change
 141                  */
 142                 void add_marker_view_item(MarkerView* item, void* src) ;
 143
 144                 /**
 145                  * Removes the named marker view from the list of marker view associated with this item
 146                  * The Marker view is not destroyed on removal, so the caller must handle the item themself
 147                  *
 148                  * @param markId the id/name of the item to remove
 149                  * @param src the identity of the object that initiated the change
 150                  * @return the removed marker item
 151                  */
 152                 MarkerView* remove_named_marker_view_item(const std::string & markId, void* src) ;
 153
 154                 /**
 155                  * Removes item from the list of marker views assocaited with this item
 156                  * This method will do nothing if item if not assiciated with this item
 157                  * The Marker view is not destroyed on removal, so the caller must handle the item themself
 158                  *
 159                  * @param item the item to remove
 160                  * @param src the identity of the object that initiated the change
 161                  */
 162                 void remove_marker_view_item(MarkerView* item, void* src) ;
 163
 164                 /**
 165                  * Determines if the named marker is one of those associated with this item
 166                  *
 167                  * @param markId the id/name of the item to search for
 168                  */
 169                 bool has_marker_view_item(const std::string & markId) ;
 170
 171
 172                 //---------------------------------------------------------------------------------//
 173                 // Emitted Signals
 174
 175                 /** Emitted when a marker Item is added to this Item */
 176                 sigc::signal<void,MarkerView*,void*> MarkerViewAdded ;
 177
 178                 /** Emitted when a Marker Item is added to this Item */
 179                 sigc::signal<void,MarkerView*,void*> MarkerViewRemoved ;
 180
 181         private:
 182                 /** the list of MarkerViews associated with this item */
 183                 typedef std::list<MarkerView*> MarkerViewList ;
 184                 MarkerViewList marker_view_list ;
 185
 186
 187                 /** The parent group that this item is a member of */
 188                 ImageFrameTimeAxisGroup* the_parent_group ;
 189
 190                 // ------- Image data -----------
 191
 192                 /** the image data that we display */
 193                 //unsigned char* the_rgb_data ;
 194
 195                 /** The width of the image contained within the_rgb_data */
 196                 uint32_t image_data_width ;
 197
 198                 /** The height of the image contained within the_rgb_data */
 199                 uint32_t image_data_height ;
 200
 201                 /** the number of channels contained in the_rgb_data */
 202                 uint32_t image_data_num_channels ;
 203
 204
 205                 // ------- Our canvas element -----------
 206
 207                 /** the CanvasImageFrame to display the image */
 208                 ArdourCanvas::ImageFrame* imageframe ;
 209
 210 } ; /* class ImageFrameView */
 211
 212 #endif /* __gtk_ardour_imageframe_view_h__ */