/* === S Y N F I G ========================================================= */
/*! \file layer_pastecanvas.h
** \brief Header file for implementation of the "Paste Canvas" layer
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2007, 2008 Chris Moore
** Copyright (c) 2012-2013 Carlos López
** ......... ... 2014-2017 Ivan Mahonin
**
** This package 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 package 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.
** \endlegal
*/
/* ========================================================================= */
/* === S T A R T =========================================================== */
#ifndef __SYNFIG_LAYER_PASTECANVAS_H
#define __SYNFIG_LAYER_PASTECANVAS_H
/* === H E A D E R S ======================================================= */
#include "layer_composite.h"
#include <synfig/color.h>
#include <synfig/vector.h>
#include <synfig/real.h>
#include <synfig/time.h>
#include <synfig/canvasbase.h>
#include <synfig/canvas.h>
#include <synfig/rect.h>
#include <synfig/transformation.h>
/* === M A C R O S ========================================================= */
/* === T Y P E D E F S ===================================================== */
/* === C L A S S E S & S T R U C T S ======================================= */
namespace synfig {
/*! \class Layer_PasteCanvas
** \brief Class of the Pasted Canvas layer.
*/
class Layer_PasteCanvas : public Layer_Composite, public Layer_NoDeform
{
public:
typedef etl::handle<Layer_PasteCanvas> Handle;
private:
//! Parameter: (Origin) Position offset
ValueBase param_origin;
//! Parameter: (Transformation) Position, rotation and scale of the paste canvas layer
ValueBase param_transformation;
//! Parameter: (etl::loose_handle<synfig::Canvas>) The canvas parameter
etl::loose_handle<synfig::Canvas> sub_canvas;
//! Parameter: (Real) Time dilation of the paste canvas layer
ValueBase param_time_dilation;
//! Parameter: (Time) Time offset of the paste canvas layer
ValueBase param_time_offset;
//! Parameter: (Real) The value to grow the children outline layers
ValueBase param_outline_grow;
//! Parameter: (bool) Value that avoid hit check to go depth into the children.
ValueBase param_children_lock;
//! Recursion depth counter.
mutable int depth;
//! Boundaries of the paste canvas layer. It is the canvas's boundary
//! affected by the origin and transformation.
mutable Rect bounds;
//! signal connection for children. Seems to be used only here
sigc::connection childs_changed_connection;
// Nasty hack: Remember whether we called an extra ref() when
// setting the canvas, so we know whether to call an extra unref()
// when finished with the canvas.
//
// Here's the story:
//
// The root canvas is destructed first. That sets the
// Layer::canvas_ (the parent canvas) of any PasteCanvas layer it
// contains to nil, due to a call to Layer::set_canvas(0),
// triggered by the connection made when Layer::set_canvas
// originally set its canvas_ member to point to the root canvas.
// ~Canvas does begin_delete() which triggers that connection.
//
// After ~Canvas has run, the members of the root canvas are
// freed, including its children_ list. If this was the last
// reference to the child canvas that the pastecanvas uses, that
// child canvas will Layer_PasteCanvas::set_sub_canvas(0) on the
// PasteCanvas layer to set its canvas (the child, pasted canvas)
// not to refer to the soon-to-be destroys child canvas. But
// set_sub_canvas() originally looked at the value of
// Layer::canvas_ (the parent canvas, obtained via
// Layer::get_canvas()) to decide whether to do an extra ref() on
// canvas (the child canvas). We need to unref() it now if we
// did, but we've forgotten whether we did. So we use this
// 'extra_reference' member to store that decision.
bool extra_reference;
void childs_changed();
/*
-- ** -- S I G N A L S -------------------------------------------------------
*/
private:
//! Signal used when the canvas parameter has changed. \see layertreestore.cpp
sigc::signal<void> signal_subcanvas_changed_;
/*
-- ** -- S I G N A L I N T E R F A C E -------------------------------------
*/
public:
//! Wrapper for the subcanvas changed signal
sigc::signal<void>& signal_subcanvas_changed() { return signal_subcanvas_changed_; }
public:
//! Recursively update the Render Description for the inner inline only pasted canvases.
//! Used for copy and paste Paste Canvas Layers between compositions.
void update_renddesc();
//! Every time the Paste Canvas Layer parent canvas is changed, this
//! is called and it sets the parent of the canvas parameter to that canvas
//! if it is on line
virtual void on_canvas_set();
//! Gets the canvas parameter. It is called sub_canvas to avoid confusion
//! with the get_canvas from the Layer class.
etl::handle<synfig::Canvas> get_sub_canvas()const { return sub_canvas; }
//! Sets the canvas parameter.
//! \see get_sub_canvas()
void set_sub_canvas(etl::handle<synfig::Canvas> x);
//! Gets time dilation parameter
Real get_time_dilation()const { return param_time_dilation.get(Real()); }
//! Gets time offset parameter
Time get_time_offset()const { return param_time_offset.get(Time()); }
//! Get origin parameter
Point get_origin()const { return param_origin.get(Point()); }
//! Get transformation parameter
Transformation get_transformation()const { return param_transformation.get(Transformation()); }
//! Get summary transformation
Transformation get_summary_transformation()const
{
return get_transformation().transform( Transformation(-get_origin()) );
}
//! Default constructor
explicit Layer_PasteCanvas(Real amount = 1.0, Color::BlendMethod blend_method = Color::BLEND_COMPOSITE);
//! Destructor
virtual ~Layer_PasteCanvas();
//! Returns a string with the localized name of this layer
virtual String get_local_name()const;
//! Sets the parameter described by \a param to \a value. \see Layer::set_param
virtual bool set_param(const String & param, const synfig::ValueBase &value);
//! Get the value of the specified parameter. \see Layer::get_param
virtual ValueBase get_param(const String & param)const;
//! Sets z_range* fields of specified ContextParams \a cp
virtual void apply_z_range_to_params(ContextParams &cp)const;
//! Gets the blend color of the Layer in the context at \a pos
virtual Color get_color(Context context, const Point &pos)const;
//! Bounding rect for this layer depends from context_params
Rect get_bounding_rect_context_dependent(const ContextParams &context_params)const;
//!Returns the rectangle that includes the context of the layer and
//! the intersection of the layer in case it is active and not onto
virtual Rect get_full_bounding_rect(Context context)const;
//! Gets the parameter vocabulary
virtual Vocab get_param_vocab()const;
//! Checks to see if a part of the Paste Canvas Layer is directly under \a point
virtual synfig::Layer::Handle hit_check(synfig::Context context, const synfig::Point &point)const;
virtual void fill_sound_processor(SoundProcessor &soundProcessor) const;
virtual void on_childs_changed() { }
protected:
virtual Context build_context_queue(Context context, CanvasBase &out_queue)const;
//! Sets the time of the Paste Canvas Layer and those under it
virtual void set_time_vfunc(IndependentContext context, Time time)const;
//! Loads external resources (frames) for child layers of the Paste Canvas Layer
virtual void load_resources_vfunc(IndependentContext context, Time time)const;
//! Sets the outline_grow of the Paste Canvas Layer and those under it
virtual void set_outline_grow_vfunc(IndependentContext context, Real outline_grow)const;
//! Function to be overloaded that fills the Time Point Set with
//! all the children Time Points. In this case the children Time Points
//! are the canvas parameter children layers Time points and the Paste Canvas
//! Layer time points. \todo clarify all this comments.
virtual void get_times_vfunc(Node::time_set &set) const;
virtual rendering::Task::Handle build_rendering_task_vfunc(Context context)const;
}; // END of class Layer_PasteCanvas
}; // END of namespace synfig
/* === E N D =============================================================== */
#endif