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livetrax/gtk2_ardour/imageframe_view.cc

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/*
Copyright (C) 2003 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <algorithm>
#include <cmath>
#include <gtkmm.h>
#include <gtkmm2ext/gtk_ui.h>
#include "imageframe_time_axis.h"
#include "imageframe_time_axis_group.h"
#include "marker_time_axis.h"
#include "marker_time_axis_view.h"
#include "public_editor.h"
#include "utils.h"
#include "imageframe_view.h"
#include "imageframe.h"
#include "canvas_impl.h"
#include "gui_thread.h"
using namespace sigc ;
using namespace ARDOUR ;
using namespace Gtk;
sigc::signal<void,ImageFrameView*> ImageFrameView::GoingAway;
/**
* Constructs a new ImageFrameView upon the canvas
*
* @param item_id unique id of this item
* @param parent the parent canvas item
* @param tv the time axis view that this item is to be placed upon
* @param group the ImageFrameGroup that this item is a member of
* @param spu the current samples per canvas unit
* @param start the start frame ogf this item
* @param duration the duration of this item
* @param rgb_data the rgb data of the image
* @param width the width of the original rgb_data image data
* @param height the width of the origianl rgb_data image data
* @param num_channels the number of color channels within rgb_data
*/
ImageFrameView::ImageFrameView(const string & item_id,
ArdourCanvas::Group *parent,
ImageFrameTimeAxis* tv,
ImageFrameTimeAxisGroup* item_group,
double spu,
Gdk::Color& basic_color,
nframes_t start,
nframes_t duration,
unsigned char* rgb_data,
uint32_t width,
uint32_t height,
uint32_t num_channels)
: TimeAxisViewItem(item_id, *parent, *tv, spu, basic_color, start, duration,
TimeAxisViewItem::Visibility (TimeAxisViewItem::ShowNameText|
TimeAxisViewItem::ShowNameHighlight|
TimeAxisViewItem::ShowFrame|
TimeAxisViewItem::ShowHandles))
{
the_parent_group = item_group ;
set_name_text(item_id) ;
image_data_width = width ;
image_data_height = height ;
image_data_num_channels = num_channels ;
//This should be art_free'd once the ArtPixBuf is destroyed - this should happen when we destroy the imageframe canvas item
unsigned char* the_rgb_data = (unsigned char*) art_alloc(width*height*num_channels) ;
memcpy(the_rgb_data, rgb_data, (width*height*num_channels)) ;
ArtPixBuf* pbuf ;
pbuf = art_pixbuf_new_rgba(the_rgb_data, width, height, (num_channels * width));
imageframe = 0 ;
//calculate our image width based on the track height
double im_ratio = (double)width/(double)height ;
double im_width = ((double)(trackview.current_height() - TimeAxisViewItem::NAME_HIGHLIGHT_SIZE) * im_ratio) ;
imageframe = new ImageFrame (*group, pbuf, 1.0, 1.0, ANCHOR_NW, im_width, (trackview.current_height() - TimeAxisViewItem::NAME_HIGHLIGHT_SIZE));
frame_handle_start->signal_event().connect (bind (mem_fun (trackview.editor, &PublicEditor::canvas_imageframe_start_handle_event), frame_handle_start, this));
frame_handle_end->signal_event().connect (bind (mem_fun (trackview.editor, &PublicEditor::canvas_imageframe_end_handle_event), frame_handle_end, this));
group->signal_event().connect (bind (mem_fun (trackview.editor, &PublicEditor::canvas_imageframe_item_view_event), imageframe, this));
frame_handle_start->raise_to_top();
frame_handle_end->raise_to_top();
set_position(start, this) ;
set_duration(duration, this) ;
}
/**
* Destructor
* Reposible for removing and destroying all marker items associated with this item
*/
ImageFrameView::~ImageFrameView()
{
GoingAway (this);
// destroy any marker items we have associated with this item
for(MarkerViewList::iterator iter = marker_view_list.begin(); iter != marker_view_list.end(); ++iter)
{
MarkerView* mv = (*iter) ;
MarkerViewList::iterator next = iter ;
next++ ;
// remove the item from our marker list
// the current iterator becomes invalid after this point, so we cannot call next upon it
// luckily enough, we already have next
marker_view_list.erase(iter) ;
// remove the item from the marker time axis
MarkerTimeAxisView* mtav = dynamic_cast<MarkerTimeAxis*>(&mv->get_time_axis_view())->get_view() ;
if(mtav)
{
mtav->remove_marker_view(mv, this) ;
}
mv->set_marked_item(0) ;
delete mv ;
mv = 0 ;
// set our iterator to next, as we have invalided the current iterator with the call to erase
iter = next ;
}
// if we are the currently selected item withi the parent track, we need to se-select
if(the_parent_group)
{
if(the_parent_group->get_view().get_selected_imageframe_view() == this)
{
the_parent_group->get_view().clear_selected_imageframe_item(false) ;
}
}
delete imageframe;
imageframe = 0 ;
}
//---------------------------------------------------------------------------------------//
// Position and duration Accessors/Mutators
/**
* Set the position of this item to the specified value
*
* @param pos the new position
* @param src the identity of the object that initiated the change
* @return true if the position change was a success, false otherwise
*/
bool
ImageFrameView::set_position(nframes_t pos, void* src, double* delta)
{
nframes_t old_pos = frame_position ;
// do the standard stuff
bool ret = TimeAxisViewItem::set_position(pos, src, delta) ;
// everything went ok with the standard stuff?
if (ret) {
/* move each of our associated markers with this ImageFrameView */
for (MarkerViewList::iterator i = marker_view_list.begin(); i != marker_view_list.end(); ++i)
{
// calculate the offset of the marker
MarkerView* mv = (MarkerView*)*i ;
nframes_t marker_old_pos = mv->get_position() ;
mv->set_position(pos + (marker_old_pos - old_pos), src) ;
}
}
return(ret) ;
}
/**
* Sets the duration of this item
*
* @param dur the new duration of this item
* @param src the identity of the object that initiated the change
* @return true if the duration change was succesful, false otherwise
*/
bool
ImageFrameView::set_duration(nframes_t dur, void* src)
{
/* do the standard stuff */
bool ret = TimeAxisViewItem::set_duration(dur, src) ;
// eveything went ok with the standard stuff?
if(ret)
{
/* handle setting the sizes of our canvas itesm based on the new duration */
imageframe->property_drawwidth() = trackview.editor.frame_to_pixel(get_duration());
}
return(ret) ;
}
//---------------------------------------------------------------------------------------//
// Parent Component Methods
/**
* Sets the parent ImageFrameTimeAxisGroup of thie item
* each Item must be part of exactly one group (or 'scene') upon the timeline
*
* @param group the new parent group
*/
void
ImageFrameView::set_time_axis_group(ImageFrameTimeAxisGroup* group)
{
the_parent_group = group ;
}
/**
* Returns the parent group of this item
*
* @return the parent group of this item
*/
ImageFrameTimeAxisGroup*
ImageFrameView::get_time_axis_group()
{
return(the_parent_group) ;
}
//---------------------------------------------------------------------------------------//
// ui methods
/**
* Set the height of this item
*
* @param h the new height
*/
void
ImageFrameView::set_height (gdouble h)
{
// set the image size
// @todo might have to re-get the image data, for a large height...hmmm.
double im_ratio = (double)image_data_width/(double)image_data_height ;
imageframe->property_width() = (h - TimeAxisViewItem::NAME_Y_OFFSET) * im_ratio;
imageframe->property_height() = h - TimeAxisViewItem::NAME_Y_OFFSET;
frame->raise_to_top();
imageframe->raise_to_top();
name_highlight->raise_to_top();
name_pixbuf->raise_to_top();
frame_handle_start->raise_to_top();
frame_handle_end->raise_to_top();
name_pixbuf->property_y() = h - TimeAxisViewItem::NAME_Y_OFFSET;
frame->property_y2() = h;
name_highlight->property_y1() = (gdouble) h - TimeAxisViewItem::NAME_HIGHLIGHT_SIZE;
name_highlight->property_y2() = (gdouble) h - 1.0;
}
//---------------------------------------------------------------------------------------//
// MarkerView methods
/**
* Adds a markerView to the list of marker views associated with this item
*
* @param item the marker item to add
* @param src the identity of the object that initiated the change
*/
void
ImageFrameView::add_marker_view_item(MarkerView* item, void* src)
{
marker_view_list.push_back(item) ;
item->GoingAway.connect(bind(mem_fun(*this, &ImageFrameView::remove_marker_view_item), (void*)this));
MarkerViewAdded(item, src) ; /* EMIT_SIGNAL */
}
/**
* Removes the named marker view from the list of marker view associated with this item
* The Marker view is not destroyed on removal, so the caller must handle the item themself
*
* @param markId the id/name of the item to remove
* @param src the identity of the object that initiated the change
* @return the removed marker item
*/
MarkerView*
ImageFrameView::remove_named_marker_view_item(const string & markerId, void* src)
{
MarkerView* mv = 0 ;
MarkerViewList::iterator i = marker_view_list.begin() ;
while(i != marker_view_list.end())
{
if (((MarkerView*)*i)->get_item_name() == markerId)
{
mv = (*i) ;
marker_view_list.erase(i) ;
MarkerViewRemoved(mv,src) ; /* EMIT_SIGNAL */
// iterator is now invalid, but since we should only ever have
// one item with the specified name, things are ok, and we can
// break from the while loop
break ;
}
i++ ;
}
return(mv) ;
}
/**
* Removes item from the list of marker views assocaited with this item
* This method will do nothing if item if not assiciated with this item
*
* @param item the item to remove
* @param src the identity of the object that initiated the change
*/
void
ImageFrameView::remove_marker_view_item(MarkerView* mv, void* src)
{
ENSURE_GUI_THREAD(bind (mem_fun(*this, &ImageFrameView::remove_marker_view_item), mv, src));
MarkerViewList::iterator i ;
if((i = find (marker_view_list.begin(), marker_view_list.end(), mv)) != marker_view_list.end()) {
marker_view_list.erase(i) ;
MarkerViewRemoved (mv, src) ; /* EMIT_SIGNAL */
}
}
/**
* Determines if the named marker is one of those associated with this item
*
* @param markId the id/name of the item to search for
*/
bool
ImageFrameView::has_marker_view_item(const string & mname)
{
bool result = false ;
for (MarkerViewList::const_iterator ci = marker_view_list.begin(); ci != marker_view_list.end(); ++ci)
{
if (((MarkerView*)*ci)->get_item_name() == mname)
{
result = true ;
// found the item, so we can break the for loop
break ;
}
}
return(result) ;
}