+++ /dev/null
-/* === 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
-**
-** 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_PASTEIMAGE_H
-#define __SYNFIG_LAYER_PASTEIMAGE_H
-
-/* === H E A D E R S ======================================================= */
-
-#include "layer_composite.h"
-#include "color.h"
-#include "vector.h"
-#include "real.h"
-#include "time.h"
-#include "canvasbase.h"
-#include "canvas.h"
-#include "rect.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 : public Layer_Composite, public Layer_NoDeform
-{
- SYNFIG_LAYER_MODULE_EXT
-private:
-
- Vector origin;
- Vector focus;
-
- etl::loose_handle<synfig::Canvas> canvas;
-
- //! Recursion depth counter
- mutable int depth;
-
- Real zoom;
-
- Time time_offset;
-
- mutable Time curr_time;
-
- bool muck_with_time_;
-
- bool children_lock;
-
- mutable Rect bounds;
-
- sigc::connection child_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;
-
- /*
- -- ** -- S I G N A L S -------------------------------------------------------
- */
-
-private:
-
- sigc::signal<void> signal_subcanvas_changed_;
-
- /*
- -- ** -- S I G N A L I N T E R F A C E -------------------------------------
- */
-
-public:
-
- sigc::signal<void>& signal_subcanvas_changed() { return signal_subcanvas_changed_; }
-
-public:
-
- void update_renddesc();
-
- virtual void on_canvas_set();
-
- void set_muck_with_time(bool x=false) { muck_with_time_=x; }
-
- etl::handle<synfig::Canvas> get_sub_canvas()const { return canvas; }
- void set_sub_canvas(etl::handle<synfig::Canvas> x);
-
- Real get_zoom()const { return zoom; }
-
- Time get_time_offset()const { return time_offset; }
-
- Point get_origin()const { return origin; }
-
- Layer_PasteCanvas();
- virtual ~Layer_PasteCanvas();
-
- virtual String get_local_name()const;
-
- virtual bool set_param(const String & param, const synfig::ValueBase &value);
-
- virtual ValueBase get_param(const String & param)const;
-
- virtual Color get_color(Context context, const Point &pos)const;
-
- virtual void set_time(Context context, Time time)const;
-
- virtual bool accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
-
- virtual Vocab get_param_vocab()const;
-
- virtual synfig::Rect get_bounding_rect()const;
-
- virtual synfig::Layer::Handle hit_check(synfig::Context context, const synfig::Point &point)const;
-
-protected:
- virtual void get_times_vfunc(Node::time_set &set) const;
-
-}; // END of class Layer_PasteCanvas
-
-}; // END of namespace synfig
-
-/* === E N D =============================================================== */
-
-#endif
projects / synfig.git / blobdiff