-/* === S I N F G =========================================================== */
+/* === S Y N F I G ========================================================= */
/*! \file layer_pastecanvas.h
-** \brief Template Header
+** \brief Header file for implementation of the "Paste Canvas" layer
**
-** $Id: layer_pastecanvas.h,v 1.2 2005/01/24 03:08:18 darco Exp $
+** $Id$
**
** \legal
-** Copyright (c) 2002 Robert B. Quattlebaum Jr.
+** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2007, 2008 Chris Moore
**
-** This software and associated documentation
-** are CONFIDENTIAL and PROPRIETARY property of
-** the above-mentioned copyright holder.
+** 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.
**
-** You may not copy, print, publish, or in any
-** other way distribute this software without
-** a prior written agreement with
-** the copyright holder.
+** 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 __SINFG_LAYER_PASTEIMAGE_H
-#define __SINFG_LAYER_PASTEIMAGE_H
+#ifndef __SYNFIG_LAYER_PASTEIMAGE_H
+#define __SYNFIG_LAYER_PASTEIMAGE_H
/* === H E A D E R S ======================================================= */
/* === C L A S S E S & S T R U C T S ======================================= */
-namespace sinfg {
-
+namespace synfig {
+
class Layer_PasteCanvas : public Layer_Composite, public Layer_NoDeform
{
- SINFG_LAYER_MODULE_EXT
+ SYNFIG_LAYER_MODULE_EXT
private:
Vector origin;
+ Vector focus;
- etl::loose_handle<sinfg::Canvas> canvas;
+ etl::loose_handle<synfig::Canvas> canvas;
//! Recursion depth counter
mutable int depth;
mutable Time curr_time;
- bool optimize_layers(sinfg::Context context,sinfg::CanvasBase&)const;
+ bool muck_with_time_;
- bool do_not_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_do_not_muck_with_time(bool x=true) { do_not_muck_with_time_=true; }
+ 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);
- etl::handle<sinfg::Canvas> get_sub_canvas()const { return canvas; }
- void set_sub_canvas(etl::handle<sinfg::Canvas> x);
-
Real get_zoom()const { return zoom; }
Time get_time_offset()const { return time_offset; }
virtual ~Layer_PasteCanvas();
virtual String get_local_name()const;
-
- virtual bool set_param(const String & param, const sinfg::ValueBase &value);
+
+ virtual bool set_param(const String & param, const synfig::ValueBase &value);
virtual ValueBase get_param(const String & param)const;
virtual Vocab get_param_vocab()const;
- virtual sinfg::Rect get_bounding_rect()const;
+ virtual synfig::Rect get_bounding_rect()const;
+
+ virtual synfig::Layer::Handle hit_check(synfig::Context context, const synfig::Point &point)const;
- virtual sinfg::Layer::Handle hit_check(sinfg::Context context, const sinfg::Point &point)const;
-
protected:
- virtual void get_times_vfunc(Node::time_set &set) const;
+ virtual void get_times_vfunc(Node::time_set &set) const;
}; // END of class Layer_PasteCanvas
-}; // END of namespace sinfg
+}; // END of namespace synfig
/* === E N D =============================================================== */
projects / synfig.git / blobdiff