1 #ifndef __DALI_TOOLKIT_UIBUILDER_H__
2 #define __DALI_TOOLKIT_UIBUILDER_H__
5 * Copyright (c) 2016 Samsung Electronics Co., Ltd.
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #include <dali/public-api/actors/actor.h>
23 #include <dali/public-api/animation/animation.h>
24 #include <dali/public-api/animation/linear-constrainer.h>
25 #include <dali/devel-api/animation/path-constrainer.h>
26 #include <dali/public-api/images/frame-buffer-image.h>
34 namespace Internal DALI_INTERNAL
40 * This class provides the ability to load and style an actor tree from a string representation.
42 * The following is an example in JSON.
47 * "templates": // are named instantiable actor trees
53 * "parentOrigin":[0.5,0.5,0],
57 * "styles": // are named property sets applied to actor trees
61 * "size": [10,10,1] // root properties applied to a given root actor
62 * "actors": // properties applied to actors found by name from root
64 * "ok": // properties for an actor named "ok"
78 * "type":"defaultText",
79 * "text":"Hello World",
87 * The following shows a method to load the json file.
89 * Builder builder = Builder::New();
90 * std::string json_data(ReadFile("layout.json"));
91 * builder.LoadFromString(json_data);
94 * - Load all actors in the "stage" section to the root layer
96 * builder.AddActors( Stage::GetCurrent().GetRootLayer() );
99 * - Create an actor tree from the "templates" section
101 * TextActor actor = TextActor::DownCast( builder.Create( "defaultText" ) );
104 * - Style an actor tree from the "styles" section
106 * builder.ApplyStyle( "myStyle", actor );
109 * - Create an actor tree from json
111 * TextActor actor = TextActor::DownCast( builder.CreateFromJson("{\"type\":\"TextActor\",\"font\":\"\",\"scale\":[50,50,1]}") );
114 * - Apply a style to an actor tree from json
116 * builder.ApplyFromJson( textActor, ("{\"scale\":[5,5,1]}") );
121 class DALI_IMPORT_API Builder : public BaseHandle
125 * Create an Builder handle; this can be initialised with Builder::New()
126 * Calling member functions with an uninitialised handle is not allowed.
131 * Creates an Builder object.
132 * @return A handle to the Builder control.
134 static Builder New();
139 * This is non-virtual since derived Handle types must not contain data or virtual methods.
144 * UI string data format
148 JSON, ///< String is JSON
152 * Loads a string representation of an actor tree into memory.
153 * The Actor is not automatically added to the stage.
154 * This function will raise an exception for parse and logical structure errors.
155 * @pre The Builder has been initialized.
156 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
157 * @param data A string represenation of an Actor tree
158 * @param format The string representation format ie JSON
160 void LoadFromString( const std::string& data, UIFormat format = JSON );
163 * @brief Adds user defined constants to all future style template or animation expansions
167 * map["IMAGE_DIRECTORY"] = "/usr/share/images";
168 * builder.AddConstants( map );
170 * @pre The Builder has been initialized.
171 * @param map The user defined constants used in template expansions.
173 void AddConstants( const Property::Map& map );
176 * @brief Adds or modifies a user defined constant to all future style template or animation expansions
180 * builder.AddConstant( "IMAGE_DIRECTORY", "/usr/share/images" );
183 * @pre The Builder has been initialized.
184 * @param key The constant name to add or update
185 * @param value The new value for the constant.
187 void AddConstant( const std::string& key, const Property::Value& value );
190 * @brief Gets all currently defined constants.
194 * Property::Map map = builder.GetConstants(); // get copy of current constants
195 * map["IMAGE_DIRECTORY"] = "/usr/share/images"; // make modification
196 * builder.AddConstants( map ); // write back changes
199 * @pre The Builder has been initialized.
200 * @return A reference to the currently defined constants.
202 const Property::Map& GetConstants() const;
205 * @brief Gets a currently defined constant, or returns Property::INVALID
209 * Property::Map map = builder.GetConstants(); // get copy of current constants
210 * map["IMAGE_DIRECTORY"] = "/usr/share/images"; // make modification
211 * builder.AddConstants( map ); // write back changes
214 * @pre The Builder has been initialized.
215 * @param key The constant name to search for.
217 const Property::Value& GetConstant( const std::string& key ) const;
220 * Creates an animation from the set of known animations
222 * Animation a = builder.CreateAnimation( "wobble");
224 * @pre The Builder has been initialized.
225 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
226 * @pre The animationName exists in the animations section of the data representation
227 * @param animationName The animation name to create
228 * @returns The base handle of the created object
230 Animation CreateAnimation( const std::string& animationName );
233 * @brief Creates an animation from the set of known animations with user defined constants
237 * map["ACTOR"] = actor.GetName(); // replaces '{ACTOR} in the template
238 * Animation a = builder.CreateAnimation( "wobble");
240 * @pre The Builder has been initialized.
241 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
242 * @pre The animationName exists in the animations section of the data representation
243 * @pre The map contains all the constant expansions in the style template
244 * @param animationName The animation name to create
245 * @param map The user defined constants used in style template expansion.
246 * @returns The base handle of the created object
248 Animation CreateAnimation( const std::string& animationName, const Property::Map& map );
251 * @brief Creates an animation from the set of known animations.
253 * The animation is applied to a specific actor.
255 * Actor myInstance = builder.Create( "templateActorTree" )
256 * Animation a = builder.CreateAnimation( "wobble", myInstance );
258 * @pre The Builder has been initialized.
259 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
260 * @pre The animationName exists in the animations section of the data representation
261 * @param animationName The animation name to create
262 * @param sourceActor The starting point in an actor tree, from which to look for property owners
263 * @returns The base handle of the created object
265 Animation CreateAnimation( const std::string& animationName, Dali::Actor sourceActor );
268 * @brief Creates an animation from the set of known animations with user defined constants
270 * The animation is applied to a specific actor.
273 * map["ACTOR"] = actor.GetName(); // replaces '{ACTOR} in the template
274 * Actor myInstance = builder.Create( "templateActorTree" )
275 * Animation a = builder.CreateAnimation( "wobble", myInstance);
277 * @pre The Builder has been initialized.
278 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
279 * @pre The animationName exists in the animations section of the data representation
280 * @pre The map contains all the constant expansions in the style template
281 * @param animationName The animation name to create
282 * @param map The user defined constants used in style template expansion.
283 * @param sourceActor The starting point in an actor tree, from which to look for property owners
284 * @returns The base handle of the created object
286 Animation CreateAnimation( const std::string& animationName, const Property::Map& map, Dali::Actor sourceActor );
289 * @brief Creates an object (e.g. an actor) from the set of known style templates
292 * mActor.Add( Actor::DownCast(builder.Create( "defaultText")) );
294 * @pre The Builder has been initialized.
295 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
296 * @pre The templateName exists in the templates section of the data representation
297 * and contains 'type' property used to create the object.
298 * @param templateName The template to apply in creation.
299 * @returns The base handle of the created object
301 BaseHandle Create( const std::string& templateName );
304 * @brief Creates an object from the style templates with user defined constants
308 * map["IMAGE_DIR"] = "/usr/share/images"; // replaces '{IMAGE_DIR} in the template
309 * mActor.Add( Actor::DownCast(builder.Create( "defaultImage", map) ) );
311 * @pre The Builder has been initialized.
312 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
313 * @pre The templateName exists in the templates section of the data representation
314 * and contains 'type' property used to create the object.
315 * @param templateName The template used to create the object.
316 * @param map The user defined constants used in template expansion.
317 * @returns The base handle of the created object
319 BaseHandle Create( const std::string& templateName, const Property::Map& map );
322 * @brief Creates an object (e.g. an actor) from given json snippet
325 * Actor a = Actor::DownCast(builder.CreateFromJson( "{\"type\":\"TextActor\"}"));
327 * @pre The Builder has been initialized.
328 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
329 * @param json The json snippet used to create the object.
330 * @returns The base handle of the created object if any
332 BaseHandle CreateFromJson( const std::string& json );
335 * Apply a style (a collection of properties) to an actor.
336 * @pre The Builder has been initialized.
337 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
338 * @param styleName The name of the set of style properties to set on the handle object.
339 * @param handle Then handle of the object on which to set the properties.
341 * @return Return true if the style was found
343 bool ApplyStyle( const std::string& styleName, Handle& handle );
346 * Apply a style (a collection of properties) to an actor from the given json snippet
347 * @pre The Builder has been initialized.
348 * @pre Preconditions have been met for creating dali objects ie Images, Actors etc
349 * @param handle Then handle of the object on which to set the properties.
350 * @param json The json snippet used to create the object.
352 * @return Return true if the json snippet was parsed
354 bool ApplyFromJson( Handle& handle, const std::string& json );
358 * Add the actor tree in the "stage" section to the actor toActor.
359 * ie if the representation has a 'stage' section that contains a tree of
361 * builder.AddActors( Stage::GetCurrent().GetRootLayer() );
362 * will create and add the actors to the stage root layer.
363 * @param toActor The actor to add the created actors to
365 void AddActors( Actor toActor );
368 * Adds actors in the sectionName to the actor toActor.
369 * ie if the representation has a sectionName section that contains a tree of
371 * builder.AddActors( sectionName, Stage::GetCurrent().GetRootLayer() );
372 * will create and add the actors to the stage root layer.
373 * @param sectionName The section name to search for the actor tree
374 * @param toActor The actor to add the created actors to
376 void AddActors( const std::string §ionName, Actor toActor );
379 * Create a render task set.
380 * @pre The Builder has been initialized.
381 * @param name The library name of the render task set.
383 void CreateRenderTask( const std::string &name );
386 * Get or create FrameBufferImage from the FrameBufferImage instance library.
387 * An empty handle is returned otherwise.
388 * @pre The Builder has been initialized.
389 * @param name The name of a FrameBufferImage in the loaded representation
390 * @return A handle to a FrameBufferImage if found, otherwise empty
392 FrameBufferImage GetFrameBufferImage( const std::string &name );
395 * Get or create Path from the Path instance library.
396 * An empty handle is returned otherwise.
397 * @pre The Builder has been initialized.
398 * @param name The name of a Path in the loaded representation
399 * @return A handle to a Path if found, otherwise empty
401 Path GetPath( const std::string &name );
404 * Get or create a PathConstrainer from the set of known PathConstrainers
406 * PathConstrainer a = builder.GetPathConstrainer( "myPathConstrainer");
408 * @pre The Builder has been initialized.
409 * @pre The pathConstrainerName exists in the Constrainers section of the data representation
410 * @param pathConstrainerName The name of the PathConstrainer
411 * @returns A handle to a PathConstrainer if found, otherwise empty
413 PathConstrainer GetPathConstrainer( const std::string& pathConstrainerName );
416 * Get or create a LinearConstrainer from the set of known LinearConstrainers
418 * LinearConstrainer a = builder.GetLinearConstrainer( "myLinearConstrainer");
420 * @pre The Builder has been initialized.
421 * @pre The linearConstrainerName exists in the Constrainers section of the data representation
422 * @param linearConstrainerName The name of the LinearConstrainer
423 * @returns A handle to a LinearConstrainer if found, otherwise empty
425 LinearConstrainer GetLinearConstrainer( const std::string& linearConstrainerName );
430 * @brief Builder signal type
432 typedef Signal< void () > BuilderSignalType;
435 * @brief Signal emitted when a quit action is requested by the builder.
437 BuilderSignalType& QuitSignal();
440 explicit DALI_INTERNAL Builder(Internal::Builder *impl);
444 } // namespace Toolkit
448 #endif // __DALI_TOOLKIT_UIBUILDER_H__