5 * Copyright (c) 2022 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
56 * Scene creates a "world" that can be bound to a surface for rendering.
59 class DALI_CORE_API Scene : public BaseHandle
62 using EventProcessingFinishedSignalType = Signal<void()>; ///< Event Processing finished signal type
63 using KeyEventSignalType = Signal<void(const Dali::KeyEvent&)>; ///< Key event signal type
64 using KeyEventGeneratedSignalType = Signal<bool(const Dali::KeyEvent&)>; ///< key event generated signal type
65 using TouchEventSignalType = Signal<void(const Dali::TouchEvent&)>; ///< Touch signal type
66 using WheelEventSignalType = Signal<void(const Dali::WheelEvent&)>; ///< WheelEvent signal type
67 using WheelEventGeneratedSignalType = Signal<bool(const Dali::WheelEvent&)>; ///< WheelEvent generated signal type
69 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
75 * @param[in] orientation The rotated angle of the set surface for this scene
77 * @return a handle to a newly allocated Dali resource.
79 static Scene New(Size size, int32_t orientation = 0);
82 * @brief Downcast an Object handle to Scene handle.
84 * If handle points to a Scene object the downcast produces
85 * valid handle. If not the returned handle is left uninitialized.
86 * @param[in] handle to An object
87 * @return handle to a Scene object or an uninitialized handle
89 static Scene DownCast(BaseHandle handle);
92 * @brief Create an uninitialized Scene handle.
94 * This can be initialized with Scene::New(). Calling member
95 * functions with an uninitialized Dali::Object is not allowed.
102 * This is non-virtual since derived Handle types must not contain data or virtual methods.
107 * @brief This copy constructor is required for (smart) pointer semantics.
109 * @param [in] handle A reference to the copied handle
111 Scene(const Scene& handle);
114 * @brief This assignment operator is required for (smart) pointer semantics.
116 * @param [in] rhs A reference to the copied handle
117 * @return A reference to this
119 Scene& operator=(const Scene& rhs);
122 * @brief Adds a child Actor to the Scene.
124 * The child will be referenced.
125 * @param[in] actor The child
126 * @pre The actor has been initialized.
127 * @pre The actor does not have a parent.
129 void Add(Actor actor);
132 * @brief Removes a child Actor from the Scene.
134 * The child will be unreferenced.
135 * @param[in] actor The child
136 * @pre The actor has been added to the stage.
138 void Remove(Actor actor);
141 * @brief Returns the size of the Scene in pixels as a Vector.
143 * The x component will be the width of the Scene in pixels.
144 * The y component will be the height of the Scene in pixels.
146 * @return The size of the Scene as a Vector
148 Size GetSize() const;
151 * Sets horizontal and vertical pixels per inch value that is used by the display
152 * @param[in] dpi Horizontal and vertical dpi value
154 void SetDpi(Vector2 dpi);
157 * @brief Retrieves the DPI of the display device to which the scene is connected.
159 * @return The horizontal and vertical DPI
161 Vector2 GetDpi() const;
164 * @brief Sets the background color.
166 * @param[in] color The new background color
168 void SetBackgroundColor(const Vector4& color);
171 * @brief Gets the background color of the render surface.
173 * @return The background color
175 Vector4 GetBackgroundColor() const;
178 * @brief Retrieves the list of render-tasks.
180 * @return A valid handle to a RenderTaskList
182 Dali::RenderTaskList GetRenderTaskList() const;
185 * @brief Returns the Scene's Root Layer.
187 * @return The root layer
189 Layer GetRootLayer() const;
192 * @brief Queries the number of on-stage layers.
194 * Note that a default layer is always provided (count >= 1).
195 * @return The number of layers
197 uint32_t GetLayerCount() const;
200 * @brief Retrieves the layer at a specified depth.
202 * @param[in] depth The depth
203 * @return The layer found at the given depth
204 * @pre Depth is less than layer count; see GetLayerCount().
206 Layer GetLayer(uint32_t depth) const;
209 * @brief Informs the scene that the set surface has been resized.
211 * @param[in] width The new width of the set surface
212 * @param[in] height The new height of the set surface
214 void SurfaceResized(float width, float height);
217 * @brief Informs the scene that the surface has been replaced.
219 void SurfaceReplaced();
222 * @brief Discards this Scene from the Core.
227 * @brief Sets the render target for the surface.
229 * @param[in] renderTarget The render target for the surface
231 void SetSurfaceRenderTarget(Graphics::RenderTarget* renderTarget);
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( int32_t 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( int32_t 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 Informs the scene that the set surface has been rotated.
303 * @param[in] width The width of rotated surface
304 * @param[in] height The height of rotated surface
305 * @param[in] orientation The orientation of rotated surface
307 void SurfaceRotated(float width, float height, int32_t orientation);
310 * @brief Gets the current surface orientation. It gets the value from the scene object.
312 * @return The current surface orientation.
314 int32_t GetCurrentSurfaceOrientation() const;
317 * @brief Gets the current surface rectangle. It gets the value from the scene object.
319 * @return The current surface rectangle
321 const Rect<int32_t>& GetCurrentSurfaceRect() const;
324 * Query wheter the surface rect is changed or not.
325 * @return true if the surface rect is changed.
327 bool IsSurfaceRectChanged() const;
330 * @brief Send message to acknowledge for completing window rotation with current window orientation.
332 * If this function is called, the message is sent to render thread, then mSurfaceRectChanged in scene-graph-scene is set with true.
333 * After that, render thread checks whether window rotation event is received, mSurfaceRectChanged and the neccessary flag are set.
334 * If they are all true, rotation done function is called to complete window rotation.
336 void SetRotationCompletedAcknowledgement();
339 * @brief Query wheter is set to acknowledge for completing surface rotation.
340 * @return true it should be acknowledged.
342 * If SetRotationCompletedAcknowledgement() is called and the related message is received to scene-graph-scene,
343 * then mSurfaceRectChanged in scene-graph-scene is set with true.
345 * When this function is called, the mSurfaceRectChanged in scene-graph-scene is return.
346 * Then, the flag will be reset.
348 * @note This function should be not called the application's main thread.
349 * Because this function should be called in windwow surface's postrender() function to complete window rotation manually.
351 bool IsRotationCompletedAcknowledgementSet() const;
354 * @brief This signal is emitted just after the event processing is finished.
356 * @return The signal to connect to
358 EventProcessingFinishedSignalType& EventProcessingFinishedSignal();
361 * @brief This signal is emitted when key event is received.
363 * A callback of the following type may be connected:
365 * void YourCallbackName(const KeyEvent& event);
367 * @return The signal to connect to
369 KeyEventSignalType& KeyEventSignal();
372 * @brief The user would connect to this signal to get a KeyEvent when KeyEvent is generated.
374 * If the control already consumed key event, KeyEventProcessor do not need to Emit keyEvent.
375 * Therefore, KeyinputManager first checks whether KeyEvent is generated as KeyEventGeneratedSignal.
376 * After that keyEventProcessor must invoke KeyEvent only if KeyEventGeneratedSignal () is not consumed.
378 * A callback of the following type may be connected:
380 * bool YourCallbackName(const KeyEvent& event);
383 * @return The return is true if KeyEvent is consumed, otherwise false.
385 KeyEventGeneratedSignalType& KeyEventGeneratedSignal();
388 * @brief The user would connect to this signal to intercept a KeyEvent at window.
390 * Intercepts KeyEvents in the window before dispatching KeyEvents to the control.
391 * If a KeyEvent is consumed, no KeyEvent is delivered to the control.
393 * A callback of the following type may be connected:
395 * bool YourCallbackName(const KeyEvent& event);
398 * @return The return is true if KeyEvent is consumed, otherwise false.
400 KeyEventGeneratedSignalType& InterceptKeyEventSignal();
403 * @brief This signal is emitted when the screen is touched and when the touch ends
404 * (i.e. the down & up touch events only).
406 * If there are multiple touch points, then this will be emitted when the first touch occurs and
407 * then when the last finger is lifted.
408 * An interrupted event will also be emitted (if it occurs).
409 * A callback of the following type may be connected:
411 * void YourCallbackName( TouchEvent event );
414 * @return The touch signal to connect to
415 * @note Motion events are not emitted.
417 TouchEventSignalType& TouchedSignal();
420 * @brief This signal is emitted when wheel event is received.
422 * A callback of the following type may be connected:
424 * void YourCallbackName(const WheelEvent& event);
426 * @return The signal to connect to
428 WheelEventSignalType& WheelEventSignal();
431 * @brief When a custom wheel event occurs, it need to process the focused actor first.
433 * Therefore, KeyboardFocusManager first checks whether WheelEvent is generated as WheelEventGeneratedSignal.
434 * After that wheelEventProcessor must invoke WheelEvent only if wheelEventGeneratedSignal () is not consumed.
436 * This is only valid for custom wheel events.
438 * A callback of the following type may be connected:
440 * bool YourCallbackName(const WheelEvent& event);
443 * @return The return is true if WheelEvent is consumed, otherwise false.
445 WheelEventGeneratedSignalType& WheelEventGeneratedSignal();
447 public: // Not intended for application developers
449 * @brief This constructor is used by Dali::New() methods.
451 * @param[in] scene A pointer to an internal Scene resource
453 explicit DALI_INTERNAL Scene(Internal::Scene* scene);
456 } // namespace Integration
460 #endif // DALI_SCENE_H