X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-studio%2Ftrunk%2Fsrc%2Fsinfgapp%2Fcanvasinterface.cpp;fp=synfig-studio%2Ftrunk%2Fsrc%2Fsinfgapp%2Fcanvasinterface.cpp;h=4b97077fd3bb438b89d940c1cf53c7a550d6fc2f;hb=3a3c4bca3a17137bec5d7960560934b91ef4146e;hp=0000000000000000000000000000000000000000;hpb=41257b650db1defb40ac20072ffeef70d5985f5e;p=synfig.git

diff --git a/synfig-studio/trunk/src/sinfgapp/canvasinterface.cpp b/synfig-studio/trunk/src/sinfgapp/canvasinterface.cpp
new file mode 100644
index 0000000..4b97077
--- /dev/null
+++ b/synfig-studio/trunk/src/sinfgapp/canvasinterface.cpp
@@ -0,0 +1,857 @@
+/* === S I N F G =========================================================== */
+/*!	\file canvasinterface.cpp
+**	\brief Template File
+**
+**	$Id: canvasinterface.cpp,v 1.1.1.1 2005/01/07 03:34:37 darco Exp $
+**
+**	\legal
+**	Copyright (c) 2002 Robert B. Quattlebaum Jr.
+**
+**	This software and associated documentation
+**	are CONFIDENTIAL and PROPRIETARY property of
+**	the above-mentioned copyright holder.
+**
+**	You may not copy, print, publish, or in any
+**	other way distribute this software without
+**	a prior written agreement with
+**	the copyright holder.
+**	\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 <sinfg/valuenode_scale.h>
+#include <sinfg/valuenode_timedswap.h>
+#include <sinfg/valuenode_composite.h>
+#include <sinfg/valuenode_subtract.h>
+#include <sinfg/valuenode_linear.h>
+#include <sinfg/valuenode_reference.h>
+#include <sinfg/valuenode_twotone.h>
+#include <sinfg/valuenode_stripes.h>
+
+#include <sinfg/waypoint.h>
+#include <sinfg/loadcanvas.h>
+#include <sinfg/importer.h>
+#include <sinfg/guidset.h>
+
+#include "canvasinterface.h"
+#include "instance.h"
+
+#include "actions/layeradd.h"
+#include "actions/valuedescconvert.h"
+#include "actions/valuenodeadd.h"
+#include "actions/editmodeset.h"
+#include "action_system.h"
+
+#include "main.h"
+
+#include <sinfg/gradient.h>
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace std;
+using namespace etl;
+using namespace sinfg;
+using namespace sinfgapp;
+
+/* === 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(loose_handle<Instance> instance,handle<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()
+{
+	sinfg::info("sinfgapp::CanvasInterface::~CanvasInterface(): Deleted");
+}
+
+void
+CanvasInterface::set_time(sinfg::Time x)
+{
+	if(get_canvas()->rend_desc().get_frame_rate())
+	{
+		float fps(get_canvas()->rend_desc().get_frame_rate());
+		Time r(x.round(fps));
+		//sinfg::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;
+	cur_time_=x;
+	
+	signal_time_changed()();
+	signal_dirty_preview()();
+}
+	
+sinfg::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(loose_handle<Instance> instance,handle<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(String name, Canvas::Handle canvas, int depth)
+{
+	sinfgapp::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())
+	{
+		sinfg::error("Bad canvas passed to \"add_layer_to\"");
+		return 0;
+	}
+
+	layer->set_canvas(canvas);
+	
+	// Apply some defaults
+	if(layer->set_param("fg",sinfgapp::Main::get_foreground_color()))
+		layer->set_param("bg",sinfgapp::Main::get_background_color());
+	else
+		layer->set_param("color",sinfgapp::Main::get_foreground_color());
+
+	layer->set_param("width",sinfgapp::Main::get_bline_width().units(get_canvas()->rend_desc()));
+	layer->set_param("gradient",sinfgapp::Main::get_gradient());
+	if(name!="zoom")
+		layer->set_param("amount",sinfgapp::Main::get_opacity());
+	layer->set_param("blend_method",sinfgapp::Main::get_blend_method());
+
+	{
+		// Grab the layer's list pf parameters
+		Layer::ParamList paramlist=layer->get_param_list();
+		Layer::ParamList::iterator iter;
+		for(iter=paramlist.begin();iter!=paramlist.end();++iter)
+		{
+			ValueNode::Handle value_node;
+			
+			if(iter->second.get_type()==ValueBase::TYPE_LIST)
+				value_node=LinkableValueNode::create("dynamic_list",iter->second);
+			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;
+	}
+
+	sinfg::info("DEPTH=%d",depth);
+	// Action to move the layer (if necessary)
+	if(depth>0)
+	{
+		Action::Handle 	action(Action::create("layer_move"));
+	
+		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, 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);
+	
+	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(sinfg::ValueNode::Handle value_node, sinfg::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)
+{
+	sinfgapp::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())
+		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());
+	}
+
+	{
+		sinfgapp::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<sinfgapp::ValueDesc> &value_desc_list)
+{
+	sinfgapp::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<sinfgapp::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 sinfg::RendDesc &rend_desc)
+{
+	Action::Handle 	action(Action::create("canvas_rend_desc_set"));
+
+	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."));			
+}
+
+bool
+CanvasInterface::set_name(const String &x)
+{
+	//! \todo This needs to be converted into an action
+	get_canvas()->set_name(x);
+	signal_id_changed_();
+	return true;
+}
+
+bool
+CanvasInterface::set_description(const String &x)
+{
+	//! \todo This needs to be converted into an action
+	get_canvas()->set_description(x);
+	return true;
+}
+
+bool
+CanvasInterface::set_id(const String &x)
+{
+	//! \todo This needs to be converted into an action
+	get_canvas()->set_id(x);
+	signal_id_changed_();
+	return true;
+}
+
+
+void
+CanvasInterface::jump_to_next_keyframe()
+{
+	sinfg::info("Current time: %s",get_time().get_string().c_str());
+	try
+	{
+		sinfg::Keyframe keyframe(*get_canvas()->keyframe_list().find_next(get_time()));
+		sinfg::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(...) { sinfg::warning("Unable to find next keyframe"); }
+}
+
+void
+CanvasInterface::jump_to_prev_keyframe()
+{
+	sinfg::info("Current time: %s",get_time().get_string().c_str());
+	try
+	{
+		sinfg::Keyframe keyframe(*get_canvas()->keyframe_list().find_prev(get_time()));
+		sinfg::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(...) { sinfg::warning("Unable to find prev keyframe"); }
+}
+
+bool
+CanvasInterface::import(const sinfg::String &filename, bool copy)
+{
+	Action::PassiveGrouper group(get_instance().get(),_("Import Image"));
+	
+	sinfg::info("Attempting to import "+filename);
+
+
+	if(find(filename.begin(),filename.end(),'.')==filename.end())
+	{
+		get_ui_interface()->error("Filename must have an extension!");
+		return false;
+	}
+
+	String ext(String(filename.begin()+filename.find_last_of('.')+1,filename.end()));
+	std::transform(ext.begin(),ext.end(),ext.begin(),&::tolower);
+
+	// If this is a SIF file, then we need to do things slightly differently
+	if(ext=="sif" || ext=="sifz")try
+	{
+		
+		Canvas::Handle outside_canvas(sinfg::open_canvas(filename));
+		if(!outside_canvas)
+			throw String(_("Unable to open this composition"));
+
+		Layer::Handle layer(add_layer_to("PasteCanvas",get_canvas()));
+		if(!layer)
+			throw String(_("Unable to create \"PasteCanvas\" layer"));
+		if(!layer->set_param("canvas",ValueBase(outside_canvas)))
+			throw int();
+
+		//layer->set_description(basename(filename));
+		signal_layer_new_description()(layer,filename);
+		return true;
+	}
+	catch(String x)
+	{
+		get_ui_interface()->error(x+" -- "+filename);
+		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 size=ValueBase(get_canvas()->rend_desc().get_br()-get_canvas()->rend_desc().get_tl());
+			Vector x;
+			if(size[0]<size[1])
+			{
+				x[0]=size[0];
+				x[1]=size[0]/w*h;
+				if(size[0]<0 ^ size[1]<0)
+					x[1]=-x[1];
+			}
+			else
+			{
+				x[1]=size[1];
+				x[0]=size[1]/h*w;
+				if(size[0]<0 ^ size[1]<0)
+					x[0]=-x[0];
+			}
+			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(sinfgapp::ValueDesc value_desc,sinfg::Waypoint waypoint)
+{
+	Action::Handle 	action(Action::create("waypoint_set_smart"));
+
+	assert(action);
+	if(!action)
+		return;
+	
+	waypoint.make_unique();
+	waypoint.set_time(get_time());
+
+	ValueNode::Handle value_node(value_desc.get_value_node());
+	
+	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(sinfgapp::ValueDesc value_desc,sinfg::Waypoint waypoint)
+{
+	Action::Handle 	action(Action::create("waypoint_remove"));
+
+	assert(action);
+	if(!action)
+		return;
+	
+	ValueNode::Handle value_node(value_desc.get_value_node());
+	
+	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(ValueNode::Handle value_node)
+{
+/*
+	// Check to see if we are already exported.
+	if(value_node->is_exported())
+		return;
+
+	Action::Handle 	action(Action::create("value_node_add"));
+
+	assert(action);
+	if(!action)
+		return;
+	
+	String name(strprintf(_("Unnamed%08d"),sinfg::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("value_desc_export"));
+
+	assert(action);
+	if(!action)
+		return;
+	
+	String name(strprintf(_("Unnamed%08d"),sinfg::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(sinfgapp::ValueDesc value_desc,sinfg::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() && value_desc.get_canvas()->get_root()!=get_canvas()->get_root())do
+	{
+		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;
+		}
+	}while(0);
+#ifdef _DEBUG
+	else
+	{ sinfg::warning("Can't get canvas from value desc...?"); }
+#endif
+	
+	sinfgapp::Action::Handle action(sinfgapp::Action::create("value_desc_set"));
+	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 sinfg::String& key,const sinfg::String& data)
+{
+	get_canvas()->set_meta_data(key,data);
+}
+
+
+// this function goes with find_important_value_descs()
+static int
+_process_value_desc(const sinfgapp::ValueDesc& value_desc,std::vector<sinfgapp::ValueDesc>& out, sinfg::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(LinkableValueNode::Handle::cast_dynamic(value_node));
+			int i;
+			for(i=0;i<value_node->link_count();i++)
+			{
+				ValueNode::Handle link(value_node->get_link(i));
+				if(!link->is_exported())
+					ret+=_process_value_desc(ValueDesc(value_node,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(sinfg::Canvas::Handle canvas,std::vector<sinfgapp::ValueDesc>& out,sinfg::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<sinfgapp::ValueDesc>& out)
+{
+	sinfg::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_frame_start())
+		newtime=get_canvas()->rend_desc().get_frame_start();
+	if(newtime>=get_canvas()->rend_desc().get_frame_end())
+		newtime=get_canvas()->rend_desc().get_frame_end();
+	set_time(newtime);
+}
+
+void
+CanvasInterface::seek_time(sinfg::Time time)
+{
+	if(!time)
+		return;
+	
+	float fps(get_canvas()->rend_desc().get_frame_rate());
+
+	if(time>=sinfg::Time::end())
+	{
+		set_time(get_canvas()->rend_desc().get_time_end());
+		return;
+	}
+	if(time<=sinfg::Time::begin())
+	{
+		set_time(get_canvas()->rend_desc().get_time_end());
+		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);
+}