5 * Copyright (c) 2020 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.
25 #include <dali/public-api/object/handle.h>
26 #include <dali/public-api/math/vector2.h>
27 #include <dali/public-api/math/vector4.h>
28 #include <dali/public-api/common/vector-wrapper.h>
40 namespace Internal DALI_INTERNAL
55 * Scene creates a "world" that can be bound to a surface for rendering.
58 class DALI_CORE_API Scene : public BaseHandle
61 typedef Signal< void () > EventProcessingFinishedSignalType; ///< Event Processing finished signal type
62 typedef Signal< void (const Dali::KeyEvent&) > KeyEventSignalType; ///< Key event signal type
63 typedef Signal< bool (const Dali::KeyEvent&) > KeyEventGeneratedSignalType; ///< key event generated signal type
64 typedef Signal< void (const Dali::TouchData&) > TouchSignalType; ///< Touch signal type
65 typedef Signal< void (const Dali::WheelEvent&) > WheelEventSignalType; ///< Touched signal type
67 using FrameCallbackContainer = std::vector< std::pair< std::unique_ptr< CallbackBase >, int32_t > >;
72 * @brief Create an initialized Scene handle.
74 * @param[in] size The size of the set surface for this scene
76 * @return a handle to a newly allocated Dali resource.
78 static Scene New( Size size );
81 * @brief Downcast an Object handle to Scene handle.
83 * If handle points to a Scene object the downcast produces
84 * valid handle. If not the returned handle is left uninitialized.
85 * @param[in] handle to An object
86 * @return handle to a Scene object or an uninitialized handle
88 static Scene DownCast( BaseHandle handle );
91 * @brief Create an uninitialized Scene handle.
93 * This can be initialized with Scene::New(). Calling member
94 * functions with an uninitialized Dali::Object is not allowed.
101 * This is non-virtual since derived Handle types must not contain data or virtual methods.
106 * @brief This copy constructor is required for (smart) pointer semantics.
108 * @param [in] handle A reference to the copied handle
110 Scene(const Scene& handle);
113 * @brief This assignment operator is required for (smart) pointer semantics.
115 * @param [in] rhs A reference to the copied handle
116 * @return A reference to this
118 Scene& operator=(const Scene& rhs);
121 * @brief Adds a child Actor to the Scene.
123 * The child will be referenced.
124 * @param[in] actor The child
125 * @pre The actor has been initialized.
126 * @pre The actor does not have a parent.
128 void Add(Actor actor);
131 * @brief Removes a child Actor from the Scene.
133 * The child will be unreferenced.
134 * @param[in] actor The child
135 * @pre The actor has been added to the stage.
137 void Remove(Actor actor);
140 * @brief Returns the size of the Scene in pixels as a Vector.
142 * The x component will be the width of the Scene in pixels.
143 * The y component will be the height of the Scene in pixels.
145 * @return The size of the Scene as a Vector
147 Size GetSize() const;
150 * Sets horizontal and vertical pixels per inch value that is used by the display
151 * @param[in] dpi Horizontal and vertical dpi value
153 void SetDpi( Vector2 dpi );
156 * @brief Retrieves the DPI of the display device to which the scene is connected.
158 * @return The horizontal and vertical DPI
160 Vector2 GetDpi() const;
163 * @brief Sets the background color.
165 * @param[in] color The new background color
167 void SetBackgroundColor( const Vector4& color );
170 * @brief Gets the background color of the render surface.
172 * @return The background color
174 Vector4 GetBackgroundColor() const;
177 * @brief Retrieves the list of render-tasks.
179 * @return A valid handle to a RenderTaskList
181 Dali::RenderTaskList GetRenderTaskList() const;
184 * @brief Returns the Scene's Root Layer.
186 * @return The root layer
188 Layer GetRootLayer() const;
191 * @brief Queries the number of on-stage layers.
193 * Note that a default layer is always provided (count >= 1).
194 * @return The number of layers
196 uint32_t GetLayerCount() const;
199 * @brief Retrieves the layer at a specified depth.
201 * @param[in] depth The depth
202 * @return The layer found at the given depth
203 * @pre Depth is less than layer count; see GetLayerCount().
205 Layer GetLayer( uint32_t depth ) const;
208 * @brief Informs the scene that the set surface has been resized.
210 * @param[in] width The new width of the set surface
211 * @param[in] height The new height of the set surface
212 * @param[in] orientation The orientation of the surface
213 * @param[in] forceUpdate The flag to update force
215 void SurfaceResized( float width, float height, int orientation, bool forceUpdate );
218 * @brief Informs the scene that the surface has been replaced.
220 void SurfaceReplaced();
223 * @brief Discards this Scene from the Core.
228 * @brief Retrieve the Scene that the given actor belongs to.
231 static Integration::Scene Get( Actor actor );
234 * This function is called when an event is queued.
235 * @param[in] event A event to queue.
237 void QueueEvent( const Integration::Event& event );
240 * This function is called by Core when events are processed.
242 void ProcessEvents();
245 * @brief Adds a callback that is called when the frame rendering is done by the graphics driver.
247 * @param[in] callback The function to call
248 * @param[in] frameId The Id to specify the frame. It will be passed when the callback is called.
250 * @note A callback of the following type may be used:
252 * void MyFunction( int frameId );
254 * This callback will be deleted once it is called.
256 * @note Ownership of the callback is passed onto this class.
258 void AddFrameRenderedCallback( std::unique_ptr< CallbackBase > callback, int32_t frameId );
261 * @brief Adds a callback that is called when the frame is displayed on the display.
263 * @param[in] callback The function to call
264 * @param[in] frameId The Id to specify the frame. It will be passed when the callback is called.
266 * @note A callback of the following type may be used:
268 * void MyFunction( int frameId );
270 * This callback will be deleted once it is called.
272 * @note Ownership of the callback is passed onto this class.
274 void AddFramePresentedCallback( std::unique_ptr< CallbackBase > callback, int32_t frameId );
277 * @brief Gets the callback list that is called when the frame rendering is done by the graphics driver.
279 * @param[out] callbacks The callback list
281 * @note This is called in the update thread.
283 void GetFrameRenderedCallback( FrameCallbackContainer& callbacks );
286 * @brief Gets the callback list that is called when the frame is displayed on the display.
288 * @param[out] callbacks The callback list
290 * @note This is called in the update thread.
292 void GetFramePresentedCallback( FrameCallbackContainer& callbacks );
295 * @brief This signal is emitted just after the event processing is finished.
297 * @return The signal to connect to
299 EventProcessingFinishedSignalType& EventProcessingFinishedSignal();
302 * @brief This signal is emitted when key event is received.
304 * A callback of the following type may be connected:
306 * void YourCallbackName(const KeyEvent& event);
308 * @return The signal to connect to
310 KeyEventSignalType& KeyEventSignal();
313 * @brief The user would connect to this signal to get a KeyEvent when KeyEvent is generated.
315 * If the control already consumed key event, KeyEventProcessor do not need to Emit keyEvent.
316 * Therefore, KeyinputManager first checks whether KeyEvent is generated as KeyEventGeneratedSignal.
317 * After that keyEventProcessor must invoke KeyEvent only if KeyEventGeneratedSignal () is not consumed.
319 * A callback of the following type may be connected:
321 * bool YourCallbackName(const KeyEvent& event);
324 * @return The return is true if KeyEvent is consumed, otherwise false.
326 KeyEventGeneratedSignalType& KeyEventGeneratedSignal();
329 * @brief This signal is emitted when the screen is touched and when the touch ends
330 * (i.e. the down & up touch events only).
332 * If there are multiple touch points, then this will be emitted when the first touch occurs and
333 * then when the last finger is lifted.
334 * An interrupted event will also be emitted (if it occurs).
335 * A callback of the following type may be connected:
337 * void YourCallbackName( TouchData event );
340 * @return The touch signal to connect to
341 * @note Motion events are not emitted.
343 TouchSignalType& TouchSignal();
346 * @brief This signal is emitted when wheel event is received.
348 * A callback of the following type may be connected:
350 * void YourCallbackName(const WheelEvent& event);
352 * @return The signal to connect to
354 WheelEventSignalType& WheelEventSignal();
356 public: // Not intended for application developers
359 * @brief This constructor is used by Dali::New() methods.
361 * @param[in] scene A pointer to an internal Scene resource
363 explicit DALI_INTERNAL Scene(Internal::Scene* scene);
366 } // namespace Integration
370 #endif // DALI_SCENE_H