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/common/vector-wrapper.h>
26 #include <dali/public-api/math/vector2.h>
27 #include <dali/public-api/math/vector4.h>
28 #include <dali/public-api/object/handle.h>
39 namespace Internal DALI_INTERNAL
51 * Scene creates a "world" that can be bound to a surface for rendering.
54 class DALI_CORE_API Scene : public BaseHandle
57 using EventProcessingFinishedSignalType = Signal<void()>; ///< Event Processing finished signal type
58 using KeyEventSignalType = Signal<void(const Dali::KeyEvent&)>; ///< Key event signal type
59 using KeyEventGeneratedSignalType = Signal<bool(const Dali::KeyEvent&)>; ///< key event generated signal type
60 using TouchEventSignalType = Signal<void(const Dali::TouchEvent&)>; ///< Touch signal type
61 using WheelEventSignalType = Signal<void(const Dali::WheelEvent&)>; ///< WheelEvent signal type
63 using FrameCallbackContainer = std::vector<std::pair<std::unique_ptr<CallbackBase>, int32_t> >;
66 * @brief Create an initialized Scene handle.
68 * @param[in] size The size of the set surface for this scene
70 * @return a handle to a newly allocated Dali resource.
72 static Scene New(Size size);
75 * @brief Create an initialized Scene handle.
77 * @param[in] size The size of the set surface for this scene
78 * @param[in] orientation The orientation of the set surface for this scene
80 * @return a handle to a newly allocated Dali resource.
82 static Scene New( Size size, int orientation );
85 * @brief Downcast an Object handle to Scene handle.
87 * If handle points to a Scene object the downcast produces
88 * valid handle. If not the returned handle is left uninitialized.
89 * @param[in] handle to An object
90 * @return handle to a Scene object or an uninitialized handle
92 static Scene DownCast(BaseHandle handle);
95 * @brief Create an uninitialized Scene handle.
97 * This can be initialized with Scene::New(). Calling member
98 * functions with an uninitialized Dali::Object is not allowed.
105 * This is non-virtual since derived Handle types must not contain data or virtual methods.
110 * @brief This copy constructor is required for (smart) pointer semantics.
112 * @param [in] handle A reference to the copied handle
114 Scene(const Scene& handle);
117 * @brief This assignment operator is required for (smart) pointer semantics.
119 * @param [in] rhs A reference to the copied handle
120 * @return A reference to this
122 Scene& operator=(const Scene& rhs);
125 * @brief Adds a child Actor to the Scene.
127 * The child will be referenced.
128 * @param[in] actor The child
129 * @pre The actor has been initialized.
130 * @pre The actor does not have a parent.
132 void Add(Actor actor);
135 * @brief Removes a child Actor from the Scene.
137 * The child will be unreferenced.
138 * @param[in] actor The child
139 * @pre The actor has been added to the stage.
141 void Remove(Actor actor);
144 * @brief Returns the size of the Scene in pixels as a Vector.
146 * The x component will be the width of the Scene in pixels.
147 * The y component will be the height of the Scene in pixels.
149 * @return The size of the Scene as a Vector
151 Size GetSize() const;
154 * Sets horizontal and vertical pixels per inch value that is used by the display
155 * @param[in] dpi Horizontal and vertical dpi value
157 void SetDpi(Vector2 dpi);
160 * @brief Retrieves the DPI of the display device to which the scene is connected.
162 * @return The horizontal and vertical DPI
164 Vector2 GetDpi() const;
167 * @brief Sets the background color.
169 * @param[in] color The new background color
171 void SetBackgroundColor(const Vector4& color);
174 * @brief Gets the background color of the render surface.
176 * @return The background color
178 Vector4 GetBackgroundColor() const;
181 * @brief Retrieves the list of render-tasks.
183 * @return A valid handle to a RenderTaskList
185 Dali::RenderTaskList GetRenderTaskList() const;
188 * @brief Returns the Scene's Root Layer.
190 * @return The root layer
192 Layer GetRootLayer() const;
195 * @brief Queries the number of on-stage layers.
197 * Note that a default layer is always provided (count >= 1).
198 * @return The number of layers
200 uint32_t GetLayerCount() const;
203 * @brief Retrieves the layer at a specified depth.
205 * @param[in] depth The depth
206 * @return The layer found at the given depth
207 * @pre Depth is less than layer count; see GetLayerCount().
209 Layer GetLayer(uint32_t depth) const;
212 * @brief Informs the scene that the set surface has been resized.
214 * @param[in] width The new width of the set surface
215 * @param[in] height The new height of the set surface
217 void SurfaceResized(float width, float height);
220 * @brief Informs the scene that the surface has been replaced.
222 void SurfaceReplaced();
225 * @brief Discards this Scene from the Core.
230 * @brief Retrieve the Scene that the given actor belongs to.
233 static Integration::Scene Get(Actor actor);
236 * This function is called when an event is queued.
237 * @param[in] event A event to queue.
239 void QueueEvent(const Integration::Event& event);
242 * This function is called by Core when events are processed.
244 void ProcessEvents();
247 * @brief Adds a callback that is called when the frame rendering is done by the graphics driver.
249 * @param[in] callback The function to call
250 * @param[in] frameId The Id to specify the frame. It will be passed when the callback is called.
252 * @note A callback of the following type may be used:
254 * void MyFunction( int frameId );
256 * This callback will be deleted once it is called.
258 * @note Ownership of the callback is passed onto this class.
260 void AddFrameRenderedCallback(std::unique_ptr<CallbackBase> callback, int32_t frameId);
263 * @brief Adds a callback that is called when the frame is displayed on the display.
265 * @param[in] callback The function to call
266 * @param[in] frameId The Id to specify the frame. It will be passed when the callback is called.
268 * @note A callback of the following type may be used:
270 * void MyFunction( int frameId );
272 * This callback will be deleted once it is called.
274 * @note Ownership of the callback is passed onto this class.
276 void AddFramePresentedCallback(std::unique_ptr<CallbackBase> callback, int32_t frameId);
279 * @brief Gets the callback list that is called when the frame rendering is done by the graphics driver.
281 * @param[out] callbacks The callback list
283 * @note This is called in the update thread.
285 void GetFrameRenderedCallback(FrameCallbackContainer& callbacks);
288 * @brief Gets the callback list that is called when the frame is displayed on the display.
290 * @param[out] callbacks The callback list
292 * @note This is called in the update thread.
294 void GetFramePresentedCallback(FrameCallbackContainer& callbacks);
297 * @brief This signal is emitted just after the event processing is finished.
299 * @return The signal to connect to
301 EventProcessingFinishedSignalType& EventProcessingFinishedSignal();
304 * @brief This signal is emitted when key event is received.
306 * A callback of the following type may be connected:
308 * void YourCallbackName(const KeyEvent& event);
310 * @return The signal to connect to
312 KeyEventSignalType& KeyEventSignal();
315 * @brief The user would connect to this signal to get a KeyEvent when KeyEvent is generated.
317 * If the control already consumed key event, KeyEventProcessor do not need to Emit keyEvent.
318 * Therefore, KeyinputManager first checks whether KeyEvent is generated as KeyEventGeneratedSignal.
319 * After that keyEventProcessor must invoke KeyEvent only if KeyEventGeneratedSignal () is not consumed.
321 * A callback of the following type may be connected:
323 * bool YourCallbackName(const KeyEvent& event);
326 * @return The return is true if KeyEvent is consumed, otherwise false.
328 KeyEventGeneratedSignalType& KeyEventGeneratedSignal();
331 * @brief This signal is emitted when the screen is touched and when the touch ends
332 * (i.e. the down & up touch events only).
334 * If there are multiple touch points, then this will be emitted when the first touch occurs and
335 * then when the last finger is lifted.
336 * An interrupted event will also be emitted (if it occurs).
337 * A callback of the following type may be connected:
339 * void YourCallbackName( TouchEvent event );
342 * @return The touch signal to connect to
343 * @note Motion events are not emitted.
345 TouchEventSignalType& TouchedSignal();
348 * @brief This signal is emitted when wheel event is received.
350 * A callback of the following type may be connected:
352 * void YourCallbackName(const WheelEvent& event);
354 * @return The signal to connect to
356 WheelEventSignalType& WheelEventSignal();
358 public: // Not intended for application developers
360 * @brief This constructor is used by Dali::New() methods.
362 * @param[in] scene A pointer to an internal Scene resource
364 explicit DALI_INTERNAL Scene(Internal::Scene* scene);
367 } // namespace Integration
371 #endif // DALI_SCENE_H