X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-studio%2Fsrc%2Fsynfigapp%2Fcanvasinterface.cpp;fp=synfig-studio%2Fsrc%2Fsynfigapp%2Fcanvasinterface.cpp;h=cfc5db634ed7d51d985a0f6b0ed5cba80a9539a8;hb=a095981e18cc37a8ecc7cd237cc22b9c10329264;hp=0000000000000000000000000000000000000000;hpb=9459638ad6797b8139f1e9f0715c96076dbf0890;p=synfig.git

diff --git a/synfig-studio/src/synfigapp/canvasinterface.cpp b/synfig-studio/src/synfigapp/canvasinterface.cpp
new file mode 100644
index 0000000..cfc5db6
--- /dev/null
+++ b/synfig-studio/src/synfigapp/canvasinterface.cpp
@@ -0,0 +1,1009 @@
+/* === S Y N F I G ========================================================= */
+/*!	\file canvasinterface.cpp
+**	\brief Template File
+**
+**	$Id$
+**
+**	\legal
+**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**	Copyright (c) 2007, 2008 Chris Moore
+**	Copyright (c) 2009 Carlos A. Sosa Navarro
+**
+**	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
+*/
+/* ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+#	include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+#	include <config.h>
+#endif
+
+//#include <iostream>
+
+#include <ETL/clock>
+#include <synfig/valuenode_scale.h>
+#include <synfig/valuenode_timedswap.h>
+#include <synfig/valuenode_composite.h>
+#include <synfig/valuenode_subtract.h>
+#include <synfig/valuenode_linear.h>
+#include <synfig/valuenode_reference.h>
+#include <synfig/valuenode_twotone.h>
+#include <synfig/valuenode_stripes.h>
+#include <synfig/valuenode_bline.h>
+
+#include <synfig/waypoint.h>
+#include <synfig/loadcanvas.h>
+#include <synfig/importer.h>
+#include <synfig/guidset.h>
+
+#include "canvasinterface.h"
+#include "instance.h"
+
+#include "actions/layeradd.h"
+#include "actions/layerremove.h"
+#include "actions/valuedescconvert.h"
+#include "actions/valuenodeadd.h"
+#include "actions/editmodeset.h"
+#include "action_system.h"
+
+#include "main.h"
+
+#include <synfig/gradient.h>
+
+#include "general.h"
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace std;
+using namespace etl;
+using namespace synfig;
+using namespace synfigapp;
+
+/* === M A C R O S ========================================================= */
+
+/* === G L O B A L S ======================================================= */
+
+/* === P R O C E D U R E S ================================================= */
+
+/* === M E T H O D S ======================================================= */
+
+CanvasInterface::CanvasInterface(etl::loose_handle<Instance> instance,etl::handle<synfig::Canvas> canvas):
+	instance_(instance),
+	canvas_(canvas),
+	cur_time_(canvas->rend_desc().get_frame_start()),
+	mode_(MODE_NORMAL|MODE_ANIMATE_PAST|MODE_ANIMATE_FUTURE)
+{
+	set_selection_manager(get_instance()->get_selection_manager());
+	set_ui_interface(get_instance()->get_ui_interface());
+}
+
+CanvasInterface::~CanvasInterface()
+{
+	if (getenv("SYNFIG_DEBUG_DESTRUCTORS"))
+		synfig::info("CanvasInterface::~CanvasInterface(): Deleted");
+}
+
+void
+CanvasInterface::set_time(synfig::Time x)
+{
+	if(get_canvas()->rend_desc().get_frame_rate())
+	{
+		float fps(get_canvas()->rend_desc().get_frame_rate());
+		Time r(x.round(fps));
+		//synfig::info("CanvasInterface::set_time(): %s rounded to %s\n",x.get_string(fps).c_str(),r.get_string(fps).c_str());
+		x=r;
+	}
+	if(cur_time_.is_equal(x))
+		return;
+	get_canvas()->set_time(cur_time_=x);
+
+	// update the time in all the child canvases
+	Canvas::Children children = get_canvas()->get_root()->children();
+	handle<CanvasInterface> interface;
+	for (Canvas::Children::iterator iter = children.begin(); iter != children.end(); iter++)
+		if ((interface = get_instance()->find_canvas_interface(*iter)) != this)
+			interface->set_time(interface->get_canvas()->get_time());
+
+	signal_time_changed()();
+	signal_dirty_preview()();
+}
+
+synfig::Time
+CanvasInterface::get_time()const
+{
+	return cur_time_;
+}
+
+void
+CanvasInterface::refresh_current_values()
+{
+	get_canvas()->set_time(cur_time_);
+	signal_time_changed()();
+	signal_dirty_preview()();
+}
+
+etl::handle<CanvasInterface>
+CanvasInterface::create(etl::loose_handle<Instance> instance, etl::handle<synfig::Canvas> canvas)
+{
+	etl::handle<CanvasInterface> intrfc;
+	intrfc=new CanvasInterface(instance,canvas);
+	instance->canvas_interface_list().push_front(intrfc);
+	return intrfc;
+}
+
+void
+CanvasInterface::set_mode(Mode x)
+{
+	Action::Handle 	action(Action::EditModeSet::create());
+
+	assert(action);
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("edit_mode",x);
+
+	if(!action->is_ready())
+	{
+		get_ui_interface()->error(_("Action Not Ready, unable to change mode"));
+		assert(0);
+		return;
+	}
+
+	if(!get_instance()->perform_action(action))
+		get_ui_interface()->error(_("Unable to change mode"));
+
+//	mode_=x;
+//	signal_mode_changed_(x);
+}
+
+CanvasInterface::Mode
+CanvasInterface::get_mode()const
+{
+	return mode_;
+}
+
+
+
+Layer::Handle
+CanvasInterface::add_layer_to(synfig::String name, synfig::Canvas::Handle canvas, int depth)
+{
+	synfigapp::Action::PassiveGrouper group(get_instance().get(),_("Add Layer To"));
+
+	Layer::Handle	layer(Layer::create(name));
+
+	assert(layer);
+
+	if(!layer)
+		return 0;
+
+	if(canvas!=get_canvas() && !canvas->is_inline())
+	{
+		synfig::error("Bad canvas passed to \"add_layer_to\"");
+		return 0;
+	}
+
+	// automatically export the Index parameter of new Duplicate layers
+	if (name == "duplicate")
+		for (int i = 1; ; i++)
+		{
+			String name = strprintf(_("Index %d"), i);
+			try
+			{
+				canvas->find_value_node(name);
+			}
+			catch (Exception::IDNotFound x)
+			{
+				add_value_node(layer->dynamic_param_list().find("index")->second, name);
+				break;
+			}
+		}
+
+	layer->set_canvas(canvas);
+
+	// Apply some defaults
+	if(layer->set_param("fg",synfigapp::Main::get_outline_color()))
+		layer->set_param("bg",synfigapp::Main::get_fill_color());
+	else if (name == "outline")
+		layer->set_param("color",synfigapp::Main::get_outline_color());
+	else
+		layer->set_param("color",synfigapp::Main::get_fill_color());
+
+	layer->set_param("width",synfigapp::Main::get_bline_width().units(get_canvas()->rend_desc()));
+	layer->set_param("gradient",synfigapp::Main::get_gradient());
+	if(name!="zoom")
+		layer->set_param("amount",synfigapp::Main::get_opacity());
+	layer->set_param("blend_method",synfigapp::Main::get_blend_method());
+
+	{
+		// Grab the layer's list of parameters
+		Layer::ParamList paramlist=layer->get_param_list();
+		Layer::ParamList::iterator iter;
+
+		// loop through the static parameters
+		for(iter=paramlist.begin();iter!=paramlist.end();++iter)
+		{
+			ValueNode::Handle value_node;
+
+			// if we find any which are list values then make them
+			// into dynamic list valuenodes, unless every element of
+			// the list is a blinepoint, in which case convert it to a
+			// bline
+			if(iter->second.get_type()==ValueBase::TYPE_LIST)
+			{
+				// check whether it's a list of blinepoints only
+				vector<ValueBase> list(iter->second.get_list());
+				if (list.size())
+				{
+					vector<ValueBase>::iterator iter2;
+					for (iter2 = list.begin(); iter2 != list.end(); iter2++)
+						if (iter2->get_type() != ValueBase::TYPE_BLINEPOINT)
+							break;
+					if (iter2 == list.end())
+					{
+						value_node=LinkableValueNode::create("bline",iter->second);
+						ValueNode_BLine::Handle::cast_dynamic(value_node)->set_member_canvas(canvas);
+					}
+				}
+
+				if (!value_node)
+					value_node=LinkableValueNode::create("dynamic_list",iter->second);
+			}
+			// otherwise, if it's a type that can be converted to
+			// 'composite' (other than the types that can be radial
+			// composite) then do so
+			else if(LinkableValueNode::check_type("composite",iter->second.get_type()) &&
+					 (iter->second.get_type()!=ValueBase::TYPE_COLOR &&
+					  iter->second.get_type()!=ValueBase::TYPE_VECTOR))
+				value_node=LinkableValueNode::create("composite",iter->second);
+
+			if(value_node)
+				layer->connect_dynamic_param(iter->first,value_node);
+		}
+	}
+
+	// Action to add the layer
+	Action::Handle 	action(Action::LayerAdd::create());
+
+	assert(action);
+	if(!action)
+		return 0;
+
+	action->set_param("canvas",canvas);
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("new",layer);
+
+	if(!action->is_ready())
+	{
+		get_ui_interface()->error(_("Action Not Ready"));
+		return 0;
+	}
+
+	if(!get_instance()->perform_action(action))
+	{
+		get_ui_interface()->error(_("Action Failed."));
+		return 0;
+	}
+
+	// synfig::info("DEPTH=%d",depth);
+
+	// Action to move the layer (if necessary)
+	if(depth>0)
+	{
+		Action::Handle 	action(Action::create("LayerMove"));
+
+		assert(action);
+		if(!action)
+			return 0;
+
+		action->set_param("canvas",canvas);
+		action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+		action->set_param("layer",layer);
+		action->set_param("new_index",depth);
+
+		if(!action->is_ready())
+		{
+			get_ui_interface()->error(_("Move Action Not Ready"));
+			return 0;
+		}
+
+		if(!get_instance()->perform_action(action))
+		{
+			get_ui_interface()->error(_("Move Action Failed."));
+			return 0;
+		}
+	}
+
+
+	return layer;
+}
+
+
+bool
+CanvasInterface::convert(ValueDesc value_desc, synfig::String type)
+{
+	Action::Handle 	action(Action::ValueDescConvert::create());
+
+	assert(action);
+	if(!action)
+		return 0;
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("value_desc",value_desc);
+	action->set_param("type",type);
+	action->set_param("time",get_time());
+
+	if(!action->is_ready())
+	{
+		get_ui_interface()->error(_("Action Not Ready"));
+		return 0;
+	}
+
+	if(get_instance()->perform_action(action))
+		return true;
+
+	get_ui_interface()->error(_("Action Failed."));
+	return false;
+}
+
+bool
+CanvasInterface::add_value_node(synfig::ValueNode::Handle value_node, synfig::String name)
+{
+	if(name.empty())
+	{
+		get_ui_interface()->error(_("Empty name!"));
+		return false;
+	}
+
+	Action::Handle 	action(Action::ValueNodeAdd::create());
+
+	assert(action);
+	if(!action)
+		return 0;
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("new",value_node);
+	action->set_param("name",name);
+
+	if(!action->is_ready())
+	{
+		get_ui_interface()->error(_("Action Not Ready"));
+		return 0;
+	}
+
+	if(get_instance()->perform_action(action))
+		return true;
+
+	get_ui_interface()->error(_("Action Failed."));
+	return false;
+}
+
+Action::ParamList
+CanvasInterface::generate_param_list(const ValueDesc &value_desc)
+{
+	synfigapp::Action::ParamList param_list;
+	param_list.add("time",get_time());
+	param_list.add("canvas_interface",etl::handle<CanvasInterface>(this));
+	param_list.add("canvas",get_canvas());
+
+	param_list.add("value_desc",value_desc);
+
+	if(value_desc.parent_is_value_node())
+		param_list.add("parent_value_node",value_desc.get_parent_value_node());
+
+	if(value_desc.is_value_node())
+		param_list.add("value_node",value_desc.get_value_node());
+
+	if(value_desc.is_const())
+	{
+		// Fix 1868911: if we put a ValueBase holding a Canvas handle
+		// into the param_list and then export the canvas, the handle
+		// will miss out of having its reference count reduced,
+		// because by the time the handle is destructed the canvas
+		// will no longer be inline.  So let's not propogate that
+		// ValueBase any further than here.
+		if (value_desc.get_value_type() == ValueBase::TYPE_CANVAS)
+			param_list.add("value",Canvas::LooseHandle(value_desc.get_value().get(Canvas::LooseHandle())));
+		else
+			param_list.add("value",value_desc.get_value());
+	}
+
+	if(value_desc.parent_is_layer_param())
+	{
+		param_list.add("parent_layer",value_desc.get_layer());
+		param_list.add("parent_layer_param",value_desc.get_param_name());
+	}
+
+	{
+		synfigapp::SelectionManager::ChildrenList children_list;
+		children_list=get_selection_manager()->get_selected_children();
+		if(!value_desc.parent_is_canvas() && children_list.size()==1)
+		{
+			param_list.add("dest",value_desc);
+			param_list.add("src",children_list.front().get_value_node());
+		}
+	}
+	return param_list;
+}
+
+Action::ParamList
+CanvasInterface::generate_param_list(const std::list<synfigapp::ValueDesc> &value_desc_list)
+{
+	synfigapp::Action::ParamList param_list;
+	param_list.add("time",get_time());
+	param_list.add("canvas_interface",etl::handle<CanvasInterface>(this));
+	param_list.add("canvas",get_canvas());
+
+	std::list<synfigapp::ValueDesc>::const_iterator iter;
+	for(iter=value_desc_list.begin();iter!=value_desc_list.end();++iter)
+	{
+		param_list.add("value_desc",*iter);
+		if(iter->is_value_node())
+		{
+			param_list.add("value_node",iter->get_value_node());
+		}
+	}
+
+
+	return param_list;
+}
+
+void
+CanvasInterface::set_rend_desc(const synfig::RendDesc &rend_desc)
+{
+	Action::Handle 	action(Action::create("CanvasRendDescSet"));
+
+	assert(action);
+	if(!action)
+		return;
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("rend_desc",rend_desc);
+
+	if(!get_instance()->perform_action(action))
+		get_ui_interface()->error(_("Action Failed."));
+}
+
+void
+CanvasInterface::set_name(const synfig::String &x)
+{
+	Action::Handle 	action(Action::create("CanvasNameSet"));
+
+	assert(action);
+	if(!action)
+		return;
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("name",x);
+
+	if(!get_instance()->perform_action(action))
+		get_ui_interface()->error(_("Action Failed."));
+
+	signal_id_changed_();
+}
+
+void
+CanvasInterface::set_description(const synfig::String &x)
+{
+	Action::Handle 	action(Action::create("CanvasDescriptionSet"));
+
+	assert(action);
+	if(!action)
+		return;
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("description",x);
+
+	if(!get_instance()->perform_action(action))
+		get_ui_interface()->error(_("Action Failed."));
+}
+
+void
+CanvasInterface::set_id(const synfig::String &x)
+{
+	Action::Handle 	action(Action::create("CanvasIdSet"));
+
+	assert(action);
+	if(!action)
+		return;
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("id",x);
+
+	if(!get_instance()->perform_action(action))
+		get_ui_interface()->error(_("Action Failed."));
+
+	signal_id_changed_();
+}
+
+
+void
+CanvasInterface::jump_to_next_keyframe()
+{
+	synfig::info("Current time: %s",get_time().get_string().c_str());
+	try
+	{
+		synfig::Keyframe keyframe(*get_canvas()->keyframe_list().find_next(get_time()));
+		synfig::info("Jumping to keyframe \"%s\" at %s",keyframe.get_description().c_str(),keyframe.get_time().get_string().c_str());
+		set_time(keyframe.get_time());
+	}
+	catch(...) { synfig::warning("Unable to find next keyframe"); }
+}
+
+void
+CanvasInterface::jump_to_prev_keyframe()
+{
+	synfig::info("Current time: %s",get_time().get_string().c_str());
+	try
+	{
+		synfig::Keyframe keyframe(*get_canvas()->keyframe_list().find_prev(get_time()));
+		synfig::info("Jumping to keyframe \"%s\" at %s",keyframe.get_description().c_str(),keyframe.get_time().get_string().c_str());
+		set_time(keyframe.get_time());
+	}
+	catch(...) { synfig::warning("Unable to find prev keyframe"); }
+}
+
+bool
+CanvasInterface::import(const synfig::String &filename, synfig::String &errors, synfig::String &warnings, bool resize_image)
+{
+	Action::PassiveGrouper group(get_instance().get(),_("Import Image"));
+
+	synfig::info("Attempting to import "+filename);
+
+	if (filename_extension(filename) == "")
+	{
+		get_ui_interface()->error(_("Filename must have an extension!"));
+		return false;
+	}
+
+	String ext(filename_extension(filename));
+	if (ext.size()) ext = ext.substr(1); // skip initial '.'
+	std::transform(ext.begin(),ext.end(),ext.begin(),&::tolower);
+
+	if(ext=="svg"){//I don't like it, but worse is nothing
+		Layer::Handle _new_layer(add_layer_to("PasteCanvas",get_canvas()));
+		Layer::Handle _aux_layer(add_layer_to("svg_layer",get_canvas()));
+		if(_aux_layer){
+			_aux_layer->set_param("filename",ValueBase(filename));
+			_new_layer->set_param("canvas",ValueBase(_aux_layer->get_param("canvas")));
+			//remove aux layer
+			Action::Handle 	action(Action::LayerRemove::create());
+			assert(action);
+			if(!action)
+				return 0;
+			action->set_param("canvas",get_canvas());
+			action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+			action->set_param("layer",_aux_layer);
+			if(!action->is_ready()){
+				get_ui_interface()->error(_("Action Not Ready"));
+				return 0;
+			}
+			if(!get_instance()->perform_action(action)){
+				get_ui_interface()->error(_("Action Failed."));
+				return 0;
+			}
+		}
+		signal_layer_new_description()(_new_layer,filename);
+		return true;
+	}
+
+	// If this is a SIF file, then we need to do things slightly differently
+	if(ext=="sif" || ext=="sifz")try
+	{
+		Canvas::Handle outside_canvas(synfig::open_canvas(filename, errors, warnings));
+		if(!outside_canvas)
+			throw String(_("Unable to open this composition")) + ":\n\n" + errors;
+
+		Layer::Handle layer(add_layer_to("PasteCanvas",get_canvas()));
+		if(!layer)
+			throw String(_("Unable to create \"Paste Canvas\" layer"));
+		if(!layer->set_param("canvas",ValueBase(outside_canvas)))
+			throw int();
+		get_canvas()->register_external_canvas(filename, outside_canvas);
+
+		//layer->set_description(basename(filename));
+		signal_layer_new_description()(layer,filename);
+		return true;
+	}
+	catch(String x)
+	{
+		get_ui_interface()->error(filename + ": " + x);
+		return false;
+	}
+	catch(...)
+	{
+		get_ui_interface()->error(_("Uncaught exception when attempting\nto open this composition -- ")+filename);
+		return false;
+	}
+
+	if(!Importer::book().count(ext))
+	{
+		get_ui_interface()->error(_("I don't know how to open images of this type -- ")+ext);
+		return false;
+	}
+
+	try
+	{
+		Layer::Handle layer(add_layer_to("Import",get_canvas()));
+		int w,h;
+		if(!layer)
+			throw int();
+		if(!layer->set_param("filename",ValueBase(filename)))
+			throw int();
+		w=layer->get_param("_width").get(int());
+		h=layer->get_param("_height").get(int());
+		if(w&&h)
+		{
+			Vector x, size=ValueBase(get_canvas()->rend_desc().get_br()-get_canvas()->rend_desc().get_tl());
+
+			// vector from top left of canvas to bottom right
+			if (resize_image)
+			{
+				if(abs(size[0])<abs(size[1]))	// if canvas is tall and thin
+				{
+					x[0]=size[0];	// use full width
+					x[1]=size[0]/w*h; // and scale for height
+					if((size[0]<0) ^ (size[1]<0))
+						x[1]=-x[1];
+				}
+				else				// else canvas is short and fat (or maybe square)
+				{
+					x[1]=size[1];	// use full height
+					x[0]=size[1]/h*w; // and scale for width
+					if((size[0]<0) ^ (size[1]<0))
+						x[0]=-x[0];
+				}
+			}
+			else
+			{
+				x[0] = w/60.0;
+				x[1] = h/60.0;
+				if((size[0]<0)) x[0]=-x[0];
+				if((size[1]<0)) x[1]=-x[1];
+			}
+
+			if(!layer->set_param("tl",ValueBase(-x/2)))
+				throw int();
+			if(!layer->set_param("br",ValueBase(x/2)))
+				throw int();
+		}
+		else
+		{
+			if(!layer->set_param("tl",ValueBase(get_canvas()->rend_desc().get_tl())))
+				throw int();
+			if(!layer->set_param("br",ValueBase(get_canvas()->rend_desc().get_br())))
+				throw int();
+		}
+
+		layer->set_description(basename(filename));
+		signal_layer_new_description()(layer,filename);
+
+		return true;
+	}
+	catch(...)
+	{
+		get_ui_interface()->error("Unable to import "+filename);
+		group.cancel();
+		return false;
+	}
+}
+
+
+void
+CanvasInterface::waypoint_duplicate(synfigapp::ValueDesc value_desc,synfig::Waypoint waypoint)
+{
+	ValueNode::Handle value_node();
+	waypoint_duplicate(value_desc.get_value_node(), waypoint);
+}
+
+void
+CanvasInterface::waypoint_duplicate(ValueNode::Handle value_node,synfig::Waypoint waypoint)
+{
+	Action::Handle 	action(Action::create("WaypointSetSmart"));
+
+	assert(action);
+	if(!action)
+		return;
+
+	waypoint.make_unique();
+	waypoint.set_time(get_time());
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("waypoint",waypoint);
+	action->set_param("time",get_time());
+	action->set_param("value_node",value_node);
+
+	if(!get_instance()->perform_action(action))
+		get_ui_interface()->error(_("Action Failed."));
+}
+
+void
+CanvasInterface::waypoint_remove(synfigapp::ValueDesc value_desc,synfig::Waypoint waypoint)
+{
+	ValueNode::Handle value_node();
+	waypoint_remove(value_desc.get_value_node(), waypoint);
+}
+
+void
+CanvasInterface::waypoint_remove(ValueNode::Handle value_node,synfig::Waypoint waypoint)
+{
+	Action::Handle 	action(Action::create("WaypointRemove"));
+
+	assert(action);
+	if(!action)
+		return;
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("waypoint",waypoint);
+	action->set_param("value_node",value_node);
+
+	if(!get_instance()->perform_action(action))
+		get_ui_interface()->error(_("Action Failed."));
+}
+
+
+void
+CanvasInterface::auto_export(synfig::ValueNode::Handle /*value_node*/)
+{
+/*
+	// Check to see if we are already exported.
+	if(value_node->is_exported())
+		return;
+
+	Action::Handle 	action(Action::create("ValueNodeAdd"));
+
+	assert(action);
+	if(!action)
+		return;
+
+	String name(strprintf(_("Unnamed%08d"),synfig::UniqueID().get_uid()));
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("new",value_node);
+	action->set_param("name",name);
+
+	if(!get_instance()->perform_action(action))
+		get_ui_interface()->error(_("Action Failed."));
+*/
+}
+
+void
+CanvasInterface::auto_export(const ValueDesc& /*value_desc*/)
+{
+	// THIS FUNCTION IS DEPRECATED, AND IS NOW A STUB.
+#if 0
+	// Check to see if we are already exported.
+	if(value_desc.is_exported())
+		return;
+
+	Action::Handle 	action(Action::create("ValueDescExport"));
+
+	assert(action);
+	if(!action)
+		return;
+
+	String name(strprintf(_("Unnamed%08d"),synfig::UniqueID().get_uid()));
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("value_desc",value_desc);
+	action->set_param("name",name);
+
+	if(!get_instance()->perform_action(action))
+		get_ui_interface()->error(_("Action Failed."));
+#endif
+}
+
+bool
+CanvasInterface::change_value(synfigapp::ValueDesc value_desc,synfig::ValueBase new_value)
+{
+	// If this isn't really a change, then don't bother
+	if(new_value==value_desc.get_value(get_time()))
+		return true;
+
+	// If this change needs to take place elsewhere, then so be it.
+	if(value_desc.get_canvas())
+	{
+		if (value_desc.get_canvas()->get_root() != get_canvas()->get_root())
+		{
+			etl::handle<Instance> instance;
+			instance=find_instance(value_desc.get_canvas()->get_root());
+
+			if(instance)
+				return instance->find_canvas_interface(value_desc.get_canvas())->change_value(value_desc,new_value);
+			else
+			{
+				get_ui_interface()->error(_("The value you are trying to edit is in a composition\nwhich doesn't seem to be open. Open that composition and you\nshould be able to edit this value as normal."));
+				return false;
+			}
+		}
+	}
+#ifdef _DEBUG
+	else
+	{ synfig::warning("Can't get canvas from value desc...?"); }
+#endif
+
+	synfigapp::Action::Handle action(synfigapp::Action::create("ValueDescSet"));
+	if(!action)
+	{
+		return false;
+	}
+
+	action->set_param("canvas",get_canvas());
+	action->set_param("canvas_interface",etl::loose_handle<CanvasInterface>(this));
+	action->set_param("time",get_time());
+	action->set_param("value_desc",value_desc);
+	action->set_param("new_value",new_value);
+
+	return get_instance()->perform_action(action);
+}
+
+void
+CanvasInterface::set_meta_data(const synfig::String& key,const synfig::String& data)
+{
+	get_canvas()->set_meta_data(key,data);
+}
+
+
+// this function goes with find_important_value_descs()
+static int
+_process_value_desc(const synfigapp::ValueDesc& value_desc,std::vector<synfigapp::ValueDesc>& out, synfig::GUIDSet& guid_set)
+{
+	int ret(0);
+
+	if(value_desc.get_value_type()==ValueBase::TYPE_CANVAS)
+	{
+		Canvas::Handle canvas;
+		canvas=value_desc.get_value().get(canvas);
+		if(!canvas || !canvas->is_inline())
+			return ret;
+		ret+=CanvasInterface::find_important_value_descs(canvas,out,guid_set);
+	}
+
+	if(value_desc.is_value_node())
+	{
+		ValueNode::Handle value_node(value_desc.get_value_node());
+
+		if(guid_set.count(value_node->get_guid()))
+			return ret;
+		guid_set.insert(value_node->get_guid());
+
+		if(LinkableValueNode::Handle::cast_dynamic(value_node))
+		{
+			if(ValueNode_DynamicList::Handle::cast_dynamic(value_node))
+			{
+				out.push_back(value_desc);
+				ret++;
+			}
+			// Process the linkable ValueNode's children
+			LinkableValueNode::Handle value_node_copy(LinkableValueNode::Handle::cast_dynamic(value_node));
+			int i;
+			for(i=0;i<value_node_copy->link_count();i++)
+			{
+				ValueNode::Handle link(value_node_copy->get_link(i));
+				if(!link->is_exported())
+					ret+=_process_value_desc(ValueDesc(value_node_copy,i),out,guid_set);
+			}
+		}
+		else if(ValueNode_Animated::Handle::cast_dynamic(value_node))
+		{
+			out.push_back(value_desc);
+			ret++;
+		}
+	}
+
+	return ret;
+}
+
+int
+CanvasInterface::find_important_value_descs(synfig::Canvas::Handle canvas,std::vector<synfigapp::ValueDesc>& out,synfig::GUIDSet& guid_set)
+{
+	int ret(0);
+	if(!canvas->is_inline())
+	{
+		ValueNodeList::const_iterator iter;
+
+		for(
+			iter=canvas->value_node_list().begin();
+			iter!=canvas->value_node_list().end();
+			++iter)
+			ret+=_process_value_desc(ValueDesc(canvas,(*iter)->get_id()),out,guid_set);
+	}
+
+	Canvas::const_iterator iter;
+
+	for(iter=canvas->begin();iter!=canvas->end();++iter)
+	{
+		Layer::Handle layer(*iter);
+
+		Layer::DynamicParamList::const_iterator iter;
+		for(
+			iter=layer->dynamic_param_list().begin();
+			iter!=layer->dynamic_param_list().end();
+			++iter)
+		{
+			if(!iter->second->is_exported())
+				ret+=_process_value_desc(ValueDesc(layer,iter->first),out,guid_set);
+		}
+		ValueBase value(layer->get_param("canvas"));
+		if(value.is_valid())
+			ret+=_process_value_desc(ValueDesc(layer,"canvas"),out,guid_set);
+	}
+
+	return ret;
+}
+
+int
+CanvasInterface::find_important_value_descs(std::vector<synfigapp::ValueDesc>& out)
+{
+	synfig::GUIDSet tmp;
+	return find_important_value_descs(get_canvas(),out,tmp);
+}
+
+void
+CanvasInterface::seek_frame(int frames)
+{
+	if(!frames)
+		return;
+	float fps(get_canvas()->rend_desc().get_frame_rate());
+	Time newtime(get_time()+(float)frames/fps);
+	newtime=newtime.round(fps);
+
+	if(newtime<=get_canvas()->rend_desc().get_time_start())
+		newtime=get_canvas()->rend_desc().get_time_start();
+	if(newtime>=get_canvas()->rend_desc().get_time_end())
+		newtime=get_canvas()->rend_desc().get_time_end();
+	set_time(newtime);
+}
+
+void
+CanvasInterface::seek_time(synfig::Time time)
+{
+	if(!time)
+		return;
+
+	float fps(get_canvas()->rend_desc().get_frame_rate());
+
+	if(time>=synfig::Time::end())
+	{
+		set_time(get_canvas()->rend_desc().get_time_end());
+		return;
+	}
+	if(time<=synfig::Time::begin())
+	{
+		set_time(get_canvas()->rend_desc().get_time_start());
+		return;
+	}
+
+	Time newtime(get_time()+time);
+	newtime=newtime.round(fps);
+
+	if(newtime<=get_canvas()->rend_desc().get_time_start())
+		newtime=get_canvas()->rend_desc().get_time_start();
+	if(newtime>=get_canvas()->rend_desc().get_time_end())
+		newtime=get_canvas()->rend_desc().get_time_end();
+	set_time(newtime);
+}