1 /* === S Y N F I G ========================================================= */
3 ** \brief Layer Class Header
8 ** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
10 ** This package is free software; you can redistribute it and/or
11 ** modify it under the terms of the GNU General Public License as
12 ** published by the Free Software Foundation; either version 2 of
13 ** the License, or (at your option) any later version.
15 ** This package is distributed in the hope that it will be useful,
16 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ** General Public License for more details.
21 /* ========================================================================= */
23 /* === S T A R T =========================================================== */
25 #ifndef __SYNFIG_LAYER_H
26 #define __SYNFIG_LAYER_H
28 /* === H E A D E R S ======================================================= */
30 #include "string_decl.h"
35 #include <sigc++/signal.h>
36 #include <sigc++/connection.h>
41 /* === M A C R O S ========================================================= */
44 #define SYNFIG_LAYER_MODULE_EXT public: static const char name__[], version__[], cvs_id__[], local_name__[], category__[]; static Layer *create();
46 //! Sets the name of the layer
47 #define SYNFIG_LAYER_SET_NAME(class,x) const char class::name__[]=x
49 //! Sets the local name of the layer
50 #define SYNFIG_LAYER_SET_LOCAL_NAME(class,x) const char class::local_name__[]=x;
52 //! Sets the category of the layer
53 #define SYNFIG_LAYER_SET_CATEGORY(class,x) const char class::category__[]=x
55 //! Sets the version string for the layer
56 #define SYNFIG_LAYER_SET_VERSION(class,x) const char class::version__[]=x
58 //! Sets the CVS ID string for the layer
59 #define SYNFIG_LAYER_SET_CVS_ID(class,x) const char class::cvs_id__[]=x
62 #define SYNFIG_LAYER_INIT(class) synfig::Layer* class::create() { return new class(); }
65 #define IMPORT_PLUS(x,y) if(param==#x && value.same_as(x)) { value.put(&x);{y;}return true;}
68 #define IMPORT_AS(x,y) if(param==y && value.same_as(x)) { value.put(&x); return true;}
71 #define IMPORT(x) IMPORT_AS(x,#x)
74 #define EXPORT_AS(x,y) if(param==y) { return ValueBase(x); }
77 #define EXPORT(x) EXPORT_AS(x,#x)
80 #define EXPORT_NAME() if(param=="Name" || param=="name" || param=="name__") { return name__; } if(param=="local_name__") { return local_name__; }
83 #define EXPORT_VERSION() if(param=="Version" || param=="version" || param=="version__") { return version__; }
85 /* === T Y P E D E F S ===================================================== */
87 /* === C L A S S E S & S T R U C T S ======================================= */
102 class ProgressCallback;
114 class Layer : public Node
116 friend class ValueNode;
117 friend class Context;
120 -- ** -- T Y P E S -----------------------------------------------------------
125 //! Type that represents a pointer to a layer's constructor
126 typedef Layer* (*Factory)();
137 BookEntry(Factory factory, const String& name,const String& local_name,const String& category,const String& cvs_id,const String& version):
138 factory(factory),name(name),local_name(local_name),category(category),cvs_id(cvs_id),version(version) { }
141 typedef std::map<String,BookEntry> Book;
143 static void register_in_book(const BookEntry &);
147 static bool subsys_init();
149 static bool subsys_stop();
151 typedef std::map<String,ValueBase> ParamList;
153 typedef etl::handle<Layer> Handle;
155 typedef etl::loose_handle<Layer> LooseHandle;
157 typedef etl::handle<const Layer> ConstHandle;
159 typedef std::map<String,etl::rhandle<ValueNode> > DynamicParamList;
161 //! A list type which describes all the parameters that a layer has.
162 /*! \see get_param_vocab() */
163 typedef ParamVocab Vocab;
166 -- ** -- D A T A -------------------------------------------------------------
171 /*! \c true if the layer is visible, \c false if it is to be skipped
172 ** \see set_active(), enable(), disable, active()
176 //! Handle to the canvas to which this layer belongs
177 etl::loose_handle<Canvas> canvas_;
179 DynamicParamList dynamic_param_list_;
181 //! A description of what this layer does
188 mutable Time dirty_time_;
190 //! Contains the name of the group that this layer belongs to
194 sigc::connection parent_death_connect_;
197 -- ** -- S I G N A L S -------------------------------------------------------
203 sigc::signal<void> signal_status_changed_;
205 //! Parameter changed
206 sigc::signal<void,String> signal_param_changed_;
208 //! Description Changed
209 sigc::signal<void> signal_description_changed_;
212 sigc::signal<void, int, etl::handle<Canvas> > signal_moved_;
214 sigc::signal<void, String> signal_added_to_group_;
216 sigc::signal<void, String> signal_removed_from_group_;
219 -- ** -- S I G N A L I N T E R F A C E -------------------------------------
225 sigc::signal<void>& signal_status_changed() { return signal_status_changed_; }
227 //! Parameter changed
228 sigc::signal<void,String>& signal_param_changed() { return signal_param_changed_; }
230 //! Description Changed
231 sigc::signal<void>& signal_description_changed() { return signal_description_changed_;}
234 sigc::signal<void, int, etl::handle<Canvas> >& signal_moved() { return signal_moved_; }
236 sigc::signal<void, String>& signal_added_to_group() { return signal_added_to_group_; }
238 sigc::signal<void, String>& signal_removed_from_group() { return signal_removed_from_group_; }
241 -- ** -- C O N S T R U C T O R S ---------------------------------------------
252 -- ** -- M E M B E R F U N C T I O N S -------------------------------------
257 virtual void on_canvas_set();
259 //! Adds this layer to the given layer group
260 void add_to_group(const String&);
262 //! Removes this layer from the given layer group
263 void remove_from_group(const String&);
265 //! Removes this layer from all layer groups
266 void remove_from_all_groups();
268 //! Gets the name of the group that this layer belongs to
269 String get_group()const;
272 //DynamicParamList &dynamic_param_list() { return dynamic_param_list_; }
275 const DynamicParamList &dynamic_param_list()const { return dynamic_param_list_; }
277 bool connect_dynamic_param(const String& param, etl::loose_handle<ValueNode>);
278 bool disconnect_dynamic_param(const String& param);
280 //! Enables the layer for rendering (Making it \em active)
281 void enable() { set_active(true); }
283 //! Disables the layer for rendering. (Making it \em inactive)
284 /*! When a layer is disabled, it will be skipped when the
285 ** canvas is rendered. */
286 void disable() { set_active(false); }
288 //! Sets the 'active' flag for the Layer to the state described by \a x
289 /*! When a layer is disabled, it will be skipped when the
290 ** canvas is rendered. */
291 void set_active(bool x);
293 //! Returns that status of the 'active' flag
294 bool active()const { return active_; }
296 //! Returns the position of the layer in the canvas.
297 /*! Returns negative on error */
298 int get_depth()const;
301 float get_z_depth()const { return z_depth_; }
304 float get_z_depth(const synfig::Time& t)const;
307 void set_z_depth(float x) { z_depth_=x; }
309 //! Sets the Canvas that this Layer is a part of
310 void set_canvas(etl::loose_handle<Canvas> canvas);
312 //! Returns a handle to the Canvas to which this Layer belongs
313 etl::loose_handle<Canvas> get_canvas()const;
316 const String& get_description()const { return description_; }
319 void set_description(const String& x);
322 -- ** -- V I R T U A L F U N C T I O N S -----------------------------------
326 virtual Rect get_bounding_rect()const;
328 virtual Rect get_full_bounding_rect(Context context)const;
330 //! Returns a string containing the name of the Layer
331 virtual String get_name()const;
333 //! Returns a string containing the localized name of the Layer
334 virtual String get_local_name()const;
336 //! Gets the paramater vocabulary
337 virtual Vocab get_param_vocab()const;
339 //! Gets the version string for this layer
340 virtual String get_version()const;
343 virtual etl::handle<Transform> get_transform()const;
345 //! Sets the virtual version to use for backwards-compatibility
347 ** \see reset_version() */
348 virtual bool set_version(const String &ver);
350 //! Resets the virtual version
352 ** \see set_version() */
353 virtual void reset_version();
355 //! Sets the parameter described by \a param to \a value.
356 /*! \param param The name of the parameter to set
357 ** \param value What the parameter is to be set to.
358 ** \return \c true on success, \c false upon rejection or failure.
359 ** If it returns \c false, then the Layer is assumed to remain unchanged.
361 ** \todo \a param should be of the type <tt>const String \¶m</tt>
363 virtual bool set_param(const String ¶m, const ValueBase &value);
365 //! Sets a list of parameters
366 virtual bool set_param_list(const ParamList &);
368 //! Get the value of the specified parameter.
369 /*! \return The requested parameter value, or (upon failure) a NIL ValueBase.
371 ** \todo \a param should be of the type <tt>const String \&</tt>
373 virtual ValueBase get_param(const String ¶m)const;
375 //! Get a list of all of the parameters and their values
376 virtual ParamList get_param_list()const;
378 //! Sets the \a time for the selected Layer and those under it
379 /*! \param context Context iterator refering to next Layer.
380 ** \param time writeme
381 ** \see Handle::set_time()
383 virtual void set_time(Context context, Time time)const;
385 //! Sets the \a time for the selected Layer and those under it for a specific \a point
386 /*! \param context Context iterator refering to next Layer.
387 ** \param time writeme
388 ** \param point writeme
389 ** \see Handle::set_time()
390 ** \todo \a point should be of the type <tt>const Point \&</tt> */
391 virtual void set_time(Context context, Time time, const Point &point)const;
393 //! Gets the color of the Canvas at \a pos
394 /*! \param context Context iterator refering to next Layer.
395 ** \param pos Point which indicates where the Color should come from
396 ** \see Handle::get_color()
398 virtual Color get_color(Context context, const Point &pos)const;
400 //! Renders the Canvas to the given Surface in an accelerated manner
401 /*! \param context Context iterator refering to next Layer.
402 ** \param surface Pointer to Surface to render to.
403 ** \param quality The requested quality-level to render at.
404 ** \param renddesc The associated RendDesc.
405 ** \param cb Pointer to callback object. May be NULL if there is no callback.
406 ** \return \c true on success, \c false on failure
407 ** \see Handle::accelerated_render()
409 virtual bool accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
411 //! Checks to see if a part of the layer is directly under \a point
412 /*! \param context Context iterator refering to next Layer.
413 ** \param point The point to check
414 ** \return The handle of the layer under \a point. If there is not
415 ** a layer under \a point, then returns an empty handle. */
416 virtual Handle hit_check(Context context, const Point &point)const;
418 //! Duplicates the Layer
419 virtual Handle clone(const GUID& deriv_guid=GUID())const;
421 //! Duplicates the Layer without duplicating the value nodes
422 virtual Layer *simple_clone()const;
426 //! This is called whenever a parameter is changed
427 virtual void on_changed();
429 //! Called to figure out the animation time information
430 virtual void get_times_vfunc(Node::time_set &set) const;
433 -- ** -- S T A T I C F U N C T I O N S --------------------------------------
438 //! Creates a Layer of type \a type
439 /*! If the Layer type is unknown, then a Mime layer is created in its place.
440 ** \param type A string describing the name of the layer to construct.
441 ** \return Always returns a handle to a new Layer.
444 static Layer::LooseHandle create(const String &type);
446 }; // END of class Layer
448 }; // END of namespace synfig
451 /* === E N D =============================================================== */