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
53 * Scene creates a "world" that can be bound to a surface for rendering.
56 class DALI_CORE_API Scene : public BaseHandle
59 typedef Signal< void () > EventProcessingFinishedSignalType; ///< Event Processing finished signal type
60 typedef Signal< void (const Dali::KeyEvent&) > KeyEventSignalType; ///< Key event signal type
61 typedef Signal< bool (const Dali::KeyEvent&) > KeyEventGeneratedSignalType; ///< key event generated signal type
62 typedef Signal< void (const Dali::TouchEvent&) > TouchEventSignalType; ///< Touch signal type
63 typedef Signal< void (const Dali::WheelEvent&) > WheelEventSignalType; ///< WheelEvent signal type
65 using FrameCallbackContainer = std::vector< std::pair< std::unique_ptr< CallbackBase >, int32_t > >;
68 * @brief Create an initialized Scene handle.
70 * @param[in] size The size of the set surface for this scene
72 * @return a handle to a newly allocated Dali resource.
74 static Scene New( Size size );
77 * @brief Create an initialized Scene handle.
79 * @param[in] size The size of the set surface for this scene
80 * @param[in] orientation The orientation of the set surface for this scene
82 * @return a handle to a newly allocated Dali resource.
84 static Scene New( Size size, int orientation );
87 * @brief Downcast an Object handle to Scene handle.
89 * If handle points to a Scene object the downcast produces
90 * valid handle. If not the returned handle is left uninitialized.
91 * @param[in] handle to An object
92 * @return handle to a Scene object or an uninitialized handle
94 static Scene DownCast( BaseHandle handle );
97 * @brief Create an uninitialized Scene handle.
99 * This can be initialized with Scene::New(). Calling member
100 * functions with an uninitialized Dali::Object is not allowed.
107 * This is non-virtual since derived Handle types must not contain data or virtual methods.
112 * @brief This copy constructor is required for (smart) pointer semantics.
114 * @param [in] handle A reference to the copied handle
116 Scene(const Scene& handle);
119 * @brief This assignment operator is required for (smart) pointer semantics.
121 * @param [in] rhs A reference to the copied handle
122 * @return A reference to this
124 Scene& operator=(const Scene& rhs);
127 * @brief Adds a child Actor to the Scene.
129 * The child will be referenced.
130 * @param[in] actor The child
131 * @pre The actor has been initialized.
132 * @pre The actor does not have a parent.
134 void Add(Actor actor);
137 * @brief Removes a child Actor from the Scene.
139 * The child will be unreferenced.
140 * @param[in] actor The child
141 * @pre The actor has been added to the stage.
143 void Remove(Actor actor);
146 * @brief Returns the size of the Scene in pixels as a Vector.
148 * The x component will be the width of the Scene in pixels.
149 * The y component will be the height of the Scene in pixels.
151 * @return The size of the Scene as a Vector
153 Size GetSize() const;
156 * Sets horizontal and vertical pixels per inch value that is used by the display
157 * @param[in] dpi Horizontal and vertical dpi value
159 void SetDpi( Vector2 dpi );
162 * @brief Retrieves the DPI of the display device to which the scene is connected.
164 * @return The horizontal and vertical DPI
166 Vector2 GetDpi() const;
169 * @brief Sets the background color.
171 * @param[in] color The new background color
173 void SetBackgroundColor( const Vector4& color );
176 * @brief Gets the background color of the render surface.
178 * @return The background color
180 Vector4 GetBackgroundColor() const;
183 * @brief Retrieves the list of render-tasks.
185 * @return A valid handle to a RenderTaskList
187 Dali::RenderTaskList GetRenderTaskList() const;
190 * @brief Returns the Scene's Root Layer.
192 * @return The root layer
194 Layer GetRootLayer() const;
197 * @brief Queries the number of on-stage layers.
199 * Note that a default layer is always provided (count >= 1).
200 * @return The number of layers
202 uint32_t GetLayerCount() const;
205 * @brief Retrieves the layer at a specified depth.
207 * @param[in] depth The depth
208 * @return The layer found at the given depth
209 * @pre Depth is less than layer count; see GetLayerCount().
211 Layer GetLayer( uint32_t depth ) const;
214 * @brief Informs the scene that the set surface has been resized.
216 * @param[in] width The new width of the set surface
217 * @param[in] height The new height of the set surface
218 * @param[in] orientation The orientation of the surface
219 * @param[in] forceUpdate The flag to update force
221 void SurfaceResized( float width, float height, int orientation, bool forceUpdate );
224 * @brief Informs the scene that the surface has been replaced.
226 void SurfaceReplaced();
229 * @brief Discards this Scene from the Core.
234 * @brief Retrieve the Scene that the given actor belongs to.
237 static Integration::Scene Get( Actor actor );
240 * This function is called when an event is queued.
241 * @param[in] event A event to queue.
243 void QueueEvent( const Integration::Event& event );
246 * This function is called by Core when events are processed.
248 void ProcessEvents();
251 * @brief Adds a callback that is called when the frame rendering is done by the graphics driver.
253 * @param[in] callback The function to call
254 * @param[in] frameId The Id to specify the frame. It will be passed when the callback is called.
256 * @note A callback of the following type may be used:
258 * void MyFunction( int frameId );
260 * This callback will be deleted once it is called.
262 * @note Ownership of the callback is passed onto this class.
264 void AddFrameRenderedCallback( std::unique_ptr< CallbackBase > callback, int32_t frameId );
267 * @brief Adds a callback that is called when the frame is displayed on the display.
269 * @param[in] callback The function to call
270 * @param[in] frameId The Id to specify the frame. It will be passed when the callback is called.
272 * @note A callback of the following type may be used:
274 * void MyFunction( int frameId );
276 * This callback will be deleted once it is called.
278 * @note Ownership of the callback is passed onto this class.
280 void AddFramePresentedCallback( std::unique_ptr< CallbackBase > callback, int32_t frameId );
283 * @brief Gets the callback list that is called when the frame rendering is done by the graphics driver.
285 * @param[out] callbacks The callback list
287 * @note This is called in the update thread.
289 void GetFrameRenderedCallback( FrameCallbackContainer& callbacks );
292 * @brief Gets the callback list that is called when the frame is displayed on the display.
294 * @param[out] callbacks The callback list
296 * @note This is called in the update thread.
298 void GetFramePresentedCallback( FrameCallbackContainer& callbacks );
301 * @brief This signal is emitted just after the event processing is finished.
303 * @return The signal to connect to
305 EventProcessingFinishedSignalType& EventProcessingFinishedSignal();
308 * @brief This signal is emitted when key event is received.
310 * A callback of the following type may be connected:
312 * void YourCallbackName(const KeyEvent& event);
314 * @return The signal to connect to
316 KeyEventSignalType& KeyEventSignal();
319 * @brief The user would connect to this signal to get a KeyEvent when KeyEvent is generated.
321 * If the control already consumed key event, KeyEventProcessor do not need to Emit keyEvent.
322 * Therefore, KeyinputManager first checks whether KeyEvent is generated as KeyEventGeneratedSignal.
323 * After that keyEventProcessor must invoke KeyEvent only if KeyEventGeneratedSignal () is not consumed.
325 * A callback of the following type may be connected:
327 * bool YourCallbackName(const KeyEvent& event);
330 * @return The return is true if KeyEvent is consumed, otherwise false.
332 KeyEventGeneratedSignalType& KeyEventGeneratedSignal();
335 * @brief This signal is emitted when the screen is touched and when the touch ends
336 * (i.e. the down & up touch events only).
338 * If there are multiple touch points, then this will be emitted when the first touch occurs and
339 * then when the last finger is lifted.
340 * An interrupted event will also be emitted (if it occurs).
341 * A callback of the following type may be connected:
343 * void YourCallbackName( TouchEvent event );
346 * @return The touch signal to connect to
347 * @note Motion events are not emitted.
349 TouchEventSignalType& TouchedSignal();
352 * @brief This signal is emitted when wheel event is received.
354 * A callback of the following type may be connected:
356 * void YourCallbackName(const WheelEvent& event);
358 * @return The signal to connect to
360 WheelEventSignalType& WheelEventSignal();
362 public: // Not intended for application developers
365 * @brief This constructor is used by Dali::New() methods.
367 * @param[in] scene A pointer to an internal Scene resource
369 explicit DALI_INTERNAL Scene(Internal::Scene* scene);
372 } // namespace Integration
376 #endif // DALI_SCENE_H