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livetrax/gtk2_ardour/imageframe_time_axis_group.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 <gtkmm.h>
#include <gtkmm2ext/gtk_ui.h>
#include "imageframe_time_axis_group.h"
#include "imageframe_time_axis_view.h"
#include "imageframe_view.h"
#include "imageframe_time_axis.h"
#include "canvas-simplerect.h"
#include "region_selection.h"
#include "public_editor.h"
#include "gui_thread.h"
#include "i18n.h"
using namespace ARDOUR;
PBD::Signal1<void,ImageFrameTimeAxisGroup*> ImageFrameTimeAxisGroup::CatchDeletion;
//---------------------------------------------------------------------------------------//
// Constructor / Desctructor
/**
* Constructs a new ImageFrameTimeAxisGroup.
*
* @param iftav the parent ImageFrameTimeAxis of this view helper
* @param group_id the unique name/id of this group
*/
ImageFrameTimeAxisGroup::ImageFrameTimeAxisGroup(ImageFrameTimeAxisView& iftav, const string & group_id)
: _view_helper(iftav), _group_id(group_id)
{
selected_imageframe_item = 0;
is_selected = false;
ImageFrameView::CatchDeletion.connect (*this, ui_bind (&ImageFrameTimeAxisGroup::remove_imageframe_item, this, _1), gui_context());
}
/**
* Destructor
* Responsible for destroying any Items that may have been added to this group
*
*/
ImageFrameTimeAxisGroup::~ImageFrameTimeAxisGroup()
{
// Destroy all the ImageFramViews that we have
for(ImageFrameViewList::iterator iter = imageframe_views.begin(); iter != imageframe_views.end(); ++iter)
{
ImageFrameView* ifv = *iter;
ImageFrameViewList::iterator next = iter;
next++;
imageframe_views.erase(iter);
delete ifv;
ifv = 0;
iter = next;
}
CatchDeletion; /* EMIT_SIGNAL */
}
//---------------------------------------------------------------------------------------//
// Name/Id Accessors/Mutators
/**
* Set the name/Id of this group.
*
* @param new_name the new name of this group
* @param src the identity of the object that initiated the change
*/
void
ImageFrameTimeAxisGroup::set_group_name(const string & new_name, void* src)
{
if(_group_id != new_name)
{
std::string temp_name = _group_id;
_group_id = new_name;
NameChanged(_group_id, temp_name, src); /* EMIT_SIGNAL */
}
}
/**
* Returns the id of this group
* The group id must be unique upon a time axis
*
* @return the id of this group
*/
std::string
ImageFrameTimeAxisGroup::get_group_name() const
{
return(_group_id);
}
//---------------------------------------------------------------------------------------//
// ui methods & data
/**
* Sets the height of the time axis view and the item upon it
*
* @param height the new height
*/
int
ImageFrameTimeAxisGroup::set_item_heights(gdouble h)
{
/* limit the values to something sane-ish */
if (h < 10.0 || h > 1000.0)
{
return(-1);
}
// set the heights of all the imaeg frame views within the group
for(ImageFrameViewList::const_iterator citer = imageframe_views.begin(); citer != imageframe_views.end(); ++citer)
{
(*citer)->set_height(h);
}
return(0);
}
/**
* Sets the current samples per unit.
* this method tells each item upon the time axis of the change
*
* @param spu the new samples per canvas unit value
*/
int
ImageFrameTimeAxisGroup::set_item_samples_per_units(gdouble spp)
{
if(spp < 1.0)
{
return(-1);
}
for(ImageFrameViewList::const_iterator citer = imageframe_views.begin(); citer != imageframe_views.end(); ++citer)
{
(*citer)->set_samples_per_unit(spp);
}
return(0);
}
/**
* Sets the color of the items contained uopn this view helper
*
* @param color the new base color
*/
void
ImageFrameTimeAxisGroup::apply_item_color(Gdk::Color& color)
{
region_color = color;
for(ImageFrameViewList::const_iterator citer = imageframe_views.begin(); citer != imageframe_views.end(); citer++)
{
(*citer)->set_color (region_color);
}
}
//---------------------------------------------------------------------------------------//
// child ImageFrameView methods
/**
* Adds an ImageFrameView to the list of items upon this time axis view helper
* the new ImageFrameView is returned
*
* @param item_id the unique id of the new item
* @param image_id the id/name of the image data we are usin
* @param start the position the new item should be placed upon the time line
* @param duration the duration the new item should be placed upon the timeline
* @param rgb_data the rgb data of the image
* @param width the original image width of the rgb_data (not the size to display)
* @param height the irigianl height of the rgb_data
* @param num_channels the number of channles within the rgb_data
* @param src the identity of the object that initiated the change
*/
ImageFrameView*
ImageFrameTimeAxisGroup::add_imageframe_item(const string & frame_id, nframes_t start, nframes_t duration, unsigned char* rgb_data, uint32_t width, uint32_t height, uint32_t num_channels, void* src)
{
ImageFrameView* ifv = 0;
//check that there is not already an imageframe with that id
if(get_named_imageframe_item(frame_id) == 0)
{
ifv = new ImageFrameView(frame_id,
_view_helper.canvas_item()->property_parent(),
&(_view_helper.trackview()),
this,
_view_helper.trackview().editor.get_current_zoom(),
region_color,
start,
duration,
rgb_data,
width,
height,
num_channels);
imageframe_views.push_front(ifv);
ImageFrameAdded(ifv, src); /* EMIT_SIGNAL */
}
return(ifv);
}
/**
* Returns the named ImageFrameView or 0 if the named view does not exist on this view helper
*
* @param item_id the unique id of the item to search for
* @return the named ImageFrameView, or 0 if it is not held upon this view
*/
ImageFrameView*
ImageFrameTimeAxisGroup::get_named_imageframe_item(const string & frame_id)
{
ImageFrameView* ifv = 0;
for (ImageFrameViewList::const_iterator i = imageframe_views.begin(); i != imageframe_views.end(); ++i)
{
if (((ImageFrameView*)*i)->get_item_name() == frame_id)
{
ifv = ((ImageFrameView*)*i);
break;
}
}
return(ifv);
}
/**
* Removes the currently selected ImageFrameView
*
* @param src the identity of the object that initiated the change
* @todo need to remoev this, the selected item within group is no longer
* used in favour of a time axis selected item
* @see add_imageframe_view
*/
void
ImageFrameTimeAxisGroup::remove_selected_imageframe_item(void* src)
{
std::string frame_id;
if(selected_imageframe_item)
{
ImageFrameViewList::iterator i;
if((i = find(imageframe_views.begin(), imageframe_views.end(), selected_imageframe_item)) != imageframe_views.end())
{
imageframe_views.erase(i);
frame_id = selected_imageframe_item->get_item_name();
// note that we delete the item here
delete(selected_imageframe_item);
selected_imageframe_item = 0;
std::string track_id = _view_helper.trackview().name();
ImageFrameRemoved(track_id, _group_id, frame_id, src); /* EMIT_SIGNAL */
}
}
else
{
//cerr << "No Selected ImageFrame" << endl;
}
}
/**
* Removes and returns the named ImageFrameView from the list of ImageFrameViews held by this view helper
*
* @param item_id the ImageFrameView unique id to remove
* @param src the identity of the object that initiated the change
* @see add_imageframe_view
*/
ImageFrameView*
ImageFrameTimeAxisGroup::remove_named_imageframe_item(const string & frame_id, void* src)
{
ImageFrameView* removed = 0;
for(ImageFrameViewList::iterator iter = imageframe_views.begin(); iter != imageframe_views.end(); ++iter)
{
ImageFrameView* tempItem = *iter;
if(tempItem->get_item_name() == frame_id)
{
removed = tempItem;
imageframe_views.erase(iter);
if (removed == selected_imageframe_item)
{
selected_imageframe_item = 0;
}
std::string track_id = _view_helper.trackview().name();
ImageFrameRemoved(track_id, _group_id, frame_id, src); /* EMIT_SIGNAL */
// break from the for loop
break;
}
iter++;
}
return(removed);
}
/**
* Removes ifv from the list of ImageFrameViews upon this TimeAxis.
* if ifv is not upon this TimeAxis, this method takes no action
*
* @param ifv the ImageFrameView to remove
*/
void
ImageFrameTimeAxisGroup::remove_imageframe_item (ImageFrameView* ifv)
{
ENSURE_GUI_THREAD (*this, &ImageFrameTimeAxisGroup::remove_imageframe_item, ifv, src)
ImageFrameViewList::iterator i;
if((i = find (imageframe_views.begin(), imageframe_views.end(), ifv)) != imageframe_views.end()) {
imageframe_views.erase(i);
std::string frame_id = ifv->get_item_name();
std::string track_id = _view_helper.trackview().name();
ImageFrameRemoved(track_id, _group_id, frame_id, src); /* EMIT_SIGNAL */
}
}
//---------------------------------------------------------------------------------------//
// Selected group methods
/**
* Sets the currently selected item upon this time axis
*
* @param ifv the item to set selected
*/
//void
//ImageFrameTimeAxisGroup::set_selected_imageframe_item(ImageFrameView* ifv)
//{
// if(selected_imageframe_item)
// {
// selected_imageframe_item->set_selected(false, this);
// }
//
// selected_imageframe_item = ifv;
//
// if(!ifv->get_selected())
// {
// selected_imageframe_item->set_selected(true, this);
// }
//}
/**
* Sets the currently selected item upon this time axis to the named item
*
* @param item_id the name/id of the item to set selected
*/
//void
//ImageFrameTimeAxisGroup::set_selected_imageframe_item(std::string frame_id)
//{
// selected_imageframe_item = get_named_imageframe_item(frame_id);
//}
/**
* Returns the currently selected item upon this time axis
*
* @return the currently selected item pon this time axis
*/
// ImageFrameView*
// ImageFrameTimeAxisGroup::get_selected_imageframe_item()
// {
// return(selected_imageframe_item);
// }
/**
* Returns whether this grou pis currently selected
*
* @returns true if this group is currently selected
*/
bool
ImageFrameTimeAxisGroup::get_selected() const
{
return(is_selected);
}
/**
* Sets he selected state of this group
*
* @param yn set true if this group is selected, false otherwise
*/
void
ImageFrameTimeAxisGroup::set_selected(bool yn)
{
is_selected = yn;
}
//---------------------------------------------------------------------------------------//
// Handle time axis removal
/**
* Handles the Removal of this VisualTimeAxis
* This _needs_ to be called to alert others of the removal properly, ie where the source
* of the removal came from.
*
* XXX Although im not too happy about this method of doing things, I cant think of a cleaner method
* just now to capture the source of the removal
*
* @param src the identity of the object that initiated the change
*/
void
ImageFrameTimeAxisGroup::remove_this_group(void* src)
{
/*
defer to idle loop, otherwise we'll delete this object
while we're still inside this function ...
*/
Glib::signal_idle().connect(sigc::bind(ptr_fun(&ImageFrameTimeAxisGroup::idle_remove_this_group), this, src));
}
/**
* Callback used to remove this group during the gtk idle loop
* This is used to avoid deleting the obejct while inside the remove_this_group
* method
*
* @param group the ImageFrameTimeAxisGroup to remove
* @param src the identity of the object that initiated the change
*/
gint
ImageFrameTimeAxisGroup::idle_remove_this_group(ImageFrameTimeAxisGroup* group, void* src)
{
delete group;
group = 0;
group->GroupRemoved(group->get_group_name(), src); /* EMIT_SIGNAL */
return(false);
}