1 /* === S Y N F I G ========================================================= */
3 ** \brief Canvas Class Implementation
8 ** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
9 ** Copyright (c) 2007, 2008 Chris Moore
11 ** This package is free software; you can redistribute it and/or
12 ** modify it under the terms of the GNU General Public License as
13 ** published by the Free Software Foundation; either version 2 of
14 ** the License, or (at your option) any later version.
16 ** This package is distributed in the hope that it will be useful,
17 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ** General Public License for more details.
22 /* ========================================================================= */
24 /* === S T A R T =========================================================== */
26 #ifndef __SYNFIG_CANVAS_H
27 #define __SYNFIG_CANVAS_H
29 /* === H E A D E R S ======================================================= */
34 #include <sigc++/signal.h>
35 #include <sigc++/connection.h>
39 #include "canvasbase.h"
40 #include "valuenode.h"
46 /* === M A C R O S ========================================================= */
48 /* version change history:
50 * 0.1: the original version
52 * if a waypoint goes from -179 to 179 degrees, that is a 2
53 * degree change. there's no way to express a 720 degree
54 * rotation with a single pair of waypoints
58 * angles no longer wrap at -180 degrees back to 180 degrees; if
59 * a waypoint goes from -179 to 179 degrees, that is a rotation
60 * of 358 degrees. loading a version 0.1 canvas will modify
61 * constant angle waypoints to that they are within 180 degrees
62 * of the previous waypoint's value
64 * the 'straight' blend method didn't used to work properly. it
65 * didn't work at all on transparent pixels in layers other than
66 * the PasteCanvas layer. for example, the examples/japan.sifz
67 * file has a red circle (straight, amount=1.0) on top of a
68 * striped conical gradient. if 'straight' was working, the
69 * conical gradient would be entirely obscured by the circle
70 * layer (even by its transparent pixels)
74 * the 'straight' blend method was fixed. loading a version 0.2
75 * or older canvas will replace the 'straight' blend method in
76 * non-pastecanvas layers with 'composite', unless they're
77 * completely transparent, in which case it will replace them
78 * with an 'alpha over' blend instead. Images like
79 * examples/logo.sifz use transparent straight blends to do
80 * masking, which no longer works now that 'straight' blending is
84 #define CURRENT_CANVAS_VERSION "0.3"
86 /* === T Y P E D E F S ===================================================== */
88 /* === C L A S S E S & S T R U C T S ======================================= */
98 class Canvas : public CanvasBase, public Node
101 -- ** -- T Y P E S -----------------------------------------------------------
105 typedef etl::handle<Canvas> Handle;
106 typedef etl::loose_handle<Canvas> LooseHandle;
107 typedef etl::handle<const Canvas> ConstHandle;
109 typedef std::list<Handle> Children;
111 friend void synfig::optimize_layers(Time, Context, Canvas::Handle, bool seen_motion_blur);
114 -- ** -- D A T A -------------------------------------------------------------
119 //! Contains the ID string for the Canvas
120 /*! \see get_id(), set_id() */
123 //! Contains the name of the Canvas
124 /*! \see set_name(), get_name() */
127 //! Contains a description of the Canvas
128 /*! \see set_description(), get_description() */
131 //! Contains the canvas' version string
132 /*! \see set_version(), get_version() */
135 //! Contains the author's name
136 /*! \see set_author(), get_author() */
139 //! Contains the author's email address
140 /*! \todo This private parameter has no binding, so it's unusable at the moment */
143 //! File name of Canvas
144 /*! \see get_file_name(), set_file_name() */
147 //! Metadata map for Canvas.
148 /*! \see get_meta_data(), set_meta_data(), erase_meta_data() */
149 std::map<String, String> meta_data_;
151 //! Contains a list of ValueNodes that are in this Canvas
152 /*! \see value_node_list(), find_value_node() */
153 ValueNodeList value_node_list_;
156 KeyframeList keyframe_list_;
158 //! A handle to the parent canvas of this canvas.
159 /*! If canvas is a root canvas, then this handle is empty
164 //! List containing any child Canvases
165 /*! \see children() */
168 //! Render Description for Canvas
169 /*! \see rend_desc() */
172 //! Contains the value of the last call to set_time()
176 mutable std::map<String,Handle> externals_;
178 //! This flag is set if this canvas is "inline"
181 mutable bool is_dirty_;
185 //! Layer Group database
186 std::map<String,std::set<etl::handle<Layer> > > group_db_;
188 //! Layer Connection database
189 std::map<etl::loose_handle<Layer>,std::vector<sigc::connection> > connections_;
192 -- ** -- S I G N A L S -------------------------------------------------------
198 sigc::signal<void,String> signal_group_added_;
201 sigc::signal<void,String> signal_group_removed_;
204 sigc::signal<void,String> signal_group_changed_;
206 sigc::signal<void,String,etl::handle<synfig::Layer> > signal_group_pair_added_;
207 sigc::signal<void,String,etl::handle<synfig::Layer> > signal_group_pair_removed_;
210 sigc::signal<void,int*> signal_layers_reordered_;
213 sigc::signal<void> signal_rend_desc_changed_;
216 sigc::signal<void> signal_id_changed_;
219 //sigc::signal<void> signal_dirty_;
222 sigc::signal<void> signal_file_name_changed_;
225 sigc::signal<void, String> signal_meta_data_changed_;
227 //! Key-Specific meta data changed signals
228 std::map<String, sigc::signal<void> > signal_map_meta_data_changed_;
231 //! ValueBasenode Changed
232 sigc::signal<void, etl::handle<ValueNode> > signal_value_node_changed_;
234 sigc::signal<void, etl::handle<ValueNode> > signal_value_node_renamed_;
236 sigc::signal<void, etl::handle<ValueNode>, etl::handle<ValueNode> > signal_value_node_child_added_;
238 sigc::signal<void, etl::handle<ValueNode>, etl::handle<ValueNode> > signal_value_node_child_removed_;
241 -- ** -- S I G N A L I N T E R F A C E -------------------------------------
246 sigc::signal<void,String,etl::handle<synfig::Layer> >& signal_group_pair_added() { return signal_group_pair_added_; }
247 sigc::signal<void,String,etl::handle<synfig::Layer> >& signal_group_pair_removed() { return signal_group_pair_removed_; }
250 sigc::signal<void,String>& signal_group_added() { return signal_group_added_; }
253 sigc::signal<void,String>& signal_group_removed() { return signal_group_removed_; }
256 sigc::signal<void,String>& signal_group_changed() { return signal_group_changed_; }
259 sigc::signal<void,int*>& signal_layers_reordered() { return signal_layers_reordered_; }
262 sigc::signal<void>& signal_rend_desc_changed() { return signal_rend_desc_changed_; }
265 sigc::signal<void>& signal_id_changed() { return signal_id_changed_; }
267 //! File name Changed
268 sigc::signal<void>& signal_file_name_changed();
271 sigc::signal<void, String>& signal_meta_data_changed() { return signal_meta_data_changed_; }
274 sigc::signal<void>& signal_meta_data_changed(const String& key) { return signal_map_meta_data_changed_[key]; }
277 sigc::signal<void, etl::handle<ValueNode> >& signal_value_node_changed() { return signal_value_node_changed_; }
279 sigc::signal<void, etl::handle<ValueNode> >& signal_value_node_renamed() { return signal_value_node_renamed_; }
282 sigc::signal<void>& signal_dirty() { return signal_changed(); }
285 sigc::signal<void, etl::handle<ValueNode>, etl::handle<ValueNode> >& signal_value_node_child_added() { return signal_value_node_child_added_; }
288 sigc::signal<void, etl::handle<ValueNode>, etl::handle<ValueNode> >& signal_value_node_child_removed() { return signal_value_node_child_removed_; }
291 -- ** -- C O N S T R U C T O R S ---------------------------------------------
296 Canvas(const String &name);
303 -- ** -- M E M B E R F U N C T I O N S -------------------------------------
308 //! Returns the set of layers in group
309 std::set<etl::handle<Layer> > get_layers_in_group(const String&group);
311 //! Gets all the groups
312 std::set<String> get_groups()const;
314 //! Gets the number of groups in this canvas
315 int get_group_count()const;
317 //! Renames the given group
318 void rename_group(const String&old_name,const String&new_name);
321 bool is_inline()const { return is_inline_; }
323 //! Returns a handle to the RendDesc for this Canvas
324 RendDesc &rend_desc() { return desc_; }
326 //! Returns a handle to the RendDesc for this Canvas
327 const RendDesc &rend_desc()const { return desc_; }
329 //! Gets the name of the canvas
330 const String & get_name()const { return name_; }
332 //! Sets the name of the canvas
333 void set_name(const String &x);
335 //! Gets the version string of the canvas
336 const String get_version()const { return version_; }
338 //! Sets the version string of the canvas
339 void set_version(const String &x) { version_ = x; }
341 //! Gets the author of the canvas
342 const String & get_author()const { return author_; }
344 //! Sets the author of the canvas
345 void set_author(const String &x);
347 //! Gets the description of the canvas
348 const String & get_description()const { return description_; }
350 //! Sets the name of the canvas
351 void set_description(const String &x);
353 //! Gets the ID of the canvas
354 const String & get_id()const { return id_; }
356 //! Sets the ID of the canvas
357 void set_id(const String &x);
359 //! Returns the data string for the given meta data key
360 String get_meta_data(const String& key)const;
362 //! Returns a list of meta data keys
363 std::list<String> get_meta_data_keys()const;
365 //! Sets a meta data key to a specific string
366 void set_meta_data(const String& key, const String& data);
368 //! Removes a meta data key
369 void erase_meta_data(const String& key);
372 String get_relative_id(etl::loose_handle<const Canvas> x)const;
374 //! \internal \writeme
375 String _get_relative_id(etl::loose_handle<const Canvas> x)const;
377 //! Returns \c true if the Canvas is a root Canvas. \c false otherwise
378 bool is_root()const { return !parent_; }
380 //! Returns a handle to the parent Canvas.
381 /*! The returned handle will be empty if this is a root canvas */
382 LooseHandle parent()const { return parent_; }
384 LooseHandle get_root()const;
386 //! Returns a list of all child canvases in this canvas
387 std::list<Handle> &children() { return children_; }
389 //! Returns a list of all child canvases in this canvas
390 const std::list<Handle> &children()const { return children_; }
392 //! Gets the color at the specified point
393 //Color get_color(const Point &pos)const;
395 //! Sets the time for all the layers in the canvas
396 void set_time(Time t)const;
399 Time get_time()const { return cur_time_; }
401 //! Returns the number of layers in the canvas
404 //! Removes all the layers from the canvas
407 //! Returns true if the canvas has no layers
410 //! Returns a reference to the ValueNodeList for this Canvas
411 // ValueNodeList &value_node_list() { return value_node_list_; }
413 //! Returns a reference to the ValueNodeList for this Canvas
414 const ValueNodeList &value_node_list()const;
416 //! Returns a reference to the KeyframeList for this Canvas
417 KeyframeList &keyframe_list();
419 //! Returns a reference to the KeyframeList for this Canvas
420 const KeyframeList &keyframe_list()const;
422 //! Finds the ValueNode in the Canvas with the given \a id
423 /*! \return If found, returns a handle to the ValueNode.
424 ** Otherwise, returns an empty handle.
426 ValueNode::Handle find_value_node(const String &id);
428 //! \internal \writeme
429 ValueNode::Handle surefind_value_node(const String &id);
431 //! Finds the ValueNode in the Canvas with the given \a id
432 /*! \return If found, returns a handle to the ValueNode.
433 ** Otherwise, returns an empty handle.
435 ValueNode::ConstHandle find_value_node(const String &id)const;
438 void add_value_node(ValueNode::Handle x, const String &id);
441 //void rename_value_node(ValueNode::Handle x, const String &id);
444 void remove_value_node(ValueNode::Handle x);
447 void remove_value_node(const String &id) { remove_value_node(find_value_node(id)); }
449 //! Finds a child Canvas in the Canvas with the given \a name
450 /*! \return If found, returns a handle to the child Canvas.
451 ** If not found, it creates a new Canvas and returns it
452 ** If an error occurs, it returns an empty handle
454 Handle surefind_canvas(const String &id);
456 //! Finds a child Canvas in the Canvas with the given \a id
457 /*! \return If found, returns a handle to the child Canvas.
458 ** Otherwise, returns an empty handle.
460 Handle find_canvas(const String &id);
462 //! Finds a child Canvas in the Canvas with the given \a id
463 /*! \return If found, returns a handle to the child Canvas.
464 ** Otherwise, returns an empty handle.
466 ConstHandle find_canvas(const String &id)const;
468 //! Sets the file path for the Canvas
469 //void set_file_path(const String &);
471 //! Returns the file path from the file name
472 String get_file_path()const;
474 //! Sets the filename (with path)
475 void set_file_name(const String &);
477 //! Gets the filename (with path)
478 String get_file_name()const;
480 //! Creates a new child canvas, and returns its handle
481 Handle new_child_canvas();
483 //! Creates a new child canvas with an ID of \a id, and returns its handle
484 Handle new_child_canvas(const String &id);
486 //! Adds the given canvas as a child
487 Handle add_child_canvas(Handle child_canvas, const String &id);
489 void remove_child_canvas(Handle child_canvas);
491 etl::handle<Layer> find_layer(const Point &pos);
493 int get_depth(etl::handle<Layer>)const;
495 Context get_context()const;
499 const_iterator end()const;
501 reverse_iterator rbegin();
503 const_reverse_iterator rbegin()const;
505 etl::handle<Layer> &back();
507 void push_back(etl::handle<Layer> x);
509 void push_front(etl::handle<Layer> x);
511 void push_back_simple(etl::handle<Layer> x);
513 void insert(iterator iter,etl::handle<Layer> x);
514 void erase(iterator iter);
516 const etl::handle<Layer> &back()const;
518 void set_inline(LooseHandle parent);
520 static Handle create();
522 static Handle create_inline(Handle parent);
524 Handle clone(const GUID& deriv_guid=GUID())const;
527 void add_group_pair(String group, etl::handle<Layer> layer);
528 void remove_group_pair(String group, etl::handle<Layer> layer);
529 void add_connection(etl::loose_handle<Layer> layer, sigc::connection connection);
530 void disconnect_connections(etl::loose_handle<Layer> layer);
533 virtual void on_changed();
534 virtual void get_times_vfunc(Node::time_set &set) const;
535 }; // END of class Canvas
537 void optimize_layers(Time time, Context context, Canvas::Handle op_canvas, bool seen_motion_blur=false);
540 }; // END of namespace synfig
542 /* === E N D =============================================================== */