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livetrax/gtk2_ardour/imageframe_time_axis_group.h

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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.
*/
#ifndef __ardour_imageframe_time_axis_group_h__
#define __ardour_imageframe_time_axis_group_h__
#include <list>
#include <cmath>
#include <gdkmm/color.h>
#include <libgnomecanvas/libgnomecanvas.h>
#include <jack/jack.h>
#include "ardour/types.h"
#include "imageframe_time_axis_view.h"
class PublicEditor ;
class ImageFrameView ;
/**
* ImageFrameTimeAxisGroup defines a group/scene of ImageFrame view that can appear upon a time axis
* At the moment this is a bit bare, we really want to add some kind of time constraints upon
* items atht are added to the group, ie bounded by the start and end of the scene, which itself
* needs fleshed out.
* A viewable object may also be useful...
*
*/
class ImageFrameTimeAxisGroup : public sigc::trackable
{
public:
//---------------------------------------------------------------------------------------//
// 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(ImageFrameTimeAxisView& iftav, const std::string & group_id) ;
/**
* Destructor
* Responsible for destroying any Items that may have been added to this group
*
*/
virtual ~ImageFrameTimeAxisGroup() ;
//---------------------------------------------------------------------------------------//
// 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 set_group_name(const std::string & new_name, void* src) ;
/**
* Returns the id of this group
* The group id must be unique upon a time axis
*
* @return the id of this group
*/
std::string get_group_name() const ;
//---------------------------------------------------------------------------------------//
// Parent/Child helper object accessors
/**
* Returns the TimeAxisView thatt his object is acting as a helper for
*
* @return the TimeAxisView that this object is acting as a view helper for
*/
ImageFrameTimeAxisView& get_view() const { return _view_helper ; }
//---------------------------------------------------------------------------------------//
// ui methods & data
/**
* Sets the height of the time axis view and the item upon it
*
* @param height the new height
*/
int set_item_heights(gdouble) ;
/**
* 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 set_item_samples_per_units(gdouble spu) ;
/**
* Sets the color of the items contained uopn this view helper
*
* @param color the new base color
*/
void apply_item_color(Gdk::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* add_imageframe_item(const std::string & item_id, nframes_t start, nframes_t duration, unsigned char* rgb_data, uint32_t width, uint32_t height, uint32_t num_channels, void* src) ;
/**
* 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* get_named_imageframe_item(const std::string & item_id) ;
/**
* Removes the currently selected ImageFrameView
*
* @param src the identity of the object that initiated the change
* @see add_imageframe_view
*/
void remove_selected_imageframe_item(void* src) ;
/**
* 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* remove_named_imageframe_item(const std::string & item_id, void* src) ;
/**
* 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 remove_imageframe_item(ImageFrameView*, void* src) ;
//---------------------------------------------------------------------------------------//
// Selected group methods
// removed in favour of a track level selectewd item
// this is simply easier to manage a singularly selected item, rather than
// a selected item within each group
/**
* Sets the currently selected item upon this time axis
*
* @param ifv the item to set selected
*/
//void set_selected_imageframe_item(ImageFrameView* ifv) ;
/**
* 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 set_selected_imageframe_item(std::string item_id) ;
/**
* Returns the currently selected item upon this time axis
*
* @return the currently selected item pon this time axis
*/
//ImageFrameView* get_selected_imageframe_item() ;
/**
* Returns whether this grou pis currently selected
*
* @returns true if this group is currently selected
*/
bool get_selected() const ;
/**
* Sets he selected state of this group
*
* @param yn set true if this group is selected, false otherwise
*/
void set_selected(bool yn) ;
//---------------------------------------------------------------------------------------//
// Handle group 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
*/
virtual void remove_this_group(void* src) ;
//---------------------------------------------------------------------------------//
// Emitted Signals
static sigc::signal<void,ImageFrameTimeAxisGroup*> CatchDeletion;
/**
* Emitted when this Group has been removed
* This is different to the CatchDeletion signal in that this signal
* is emitted during the deletion of this Time Axis, and not during
* the destructor, this allows us to capture the source of the deletion
* event
*/
sigc::signal<void,std::string,void*> GroupRemoved ;
/** Emitted when we have changed the name of this TimeAxis */
sigc::signal<void,std::string,std::string,void*> NameChanged ;
/** Emitted when an ImageFrameView is added to this group */
sigc::signal<void, ImageFrameView*, void*> ImageFrameAdded ;
/** Emitted when an ImageFrameView is removed from this group */
sigc::signal<void, const std::string &, const std::string &, const std::string &, void*> ImageFrameRemoved ;
protected:
private:
/**
* convenience method to re-get the samples per unit and tell items upon this view
*
*/
void reset_samples_per_unit() ;
/**
* 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
*/
static gint idle_remove_this_group(ImageFrameTimeAxisGroup* group, void* src) ;
/** The list of ImageFrameViews held by this view helper */
typedef std::list<ImageFrameView *> ImageFrameViewList ;
ImageFrameViewList imageframe_views ;
/** the currently selected time axis item upon this time axis */
ImageFrameView* selected_imageframe_item ;
/** the view helper that this object is acting as a container upon on */
ImageFrameTimeAxisView& _view_helper ;
/** the is of this group */
std::string _group_id ;
/* XXX why are these different? */
Gdk::Color region_color ;
uint32_t stream_base_color ;
/** indicates if this group is currently selected */
bool is_selected ;
} ; /* class ImageFrameTimeAxisGroup */
#endif /* __ardour_imageframe_time_axis_group_h__ */