X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Fsrc%2Fsynfig%2Flayer_pastecanvas.h;fp=synfig-core%2Fsrc%2Fsynfig%2Flayer_pastecanvas.h;h=2d4714cb9b5abfdf36c1facc91ea232772217657;hb=a095981e18cc37a8ecc7cd237cc22b9c10329264;hp=0000000000000000000000000000000000000000;hpb=9459638ad6797b8139f1e9f0715c96076dbf0890;p=synfig.git

diff --git a/synfig-core/src/synfig/layer_pastecanvas.h b/synfig-core/src/synfig/layer_pastecanvas.h
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+/* === 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