1 #ifndef __DALI_INTERNAL_PAN_GESTURE_EVENT_PROCESSOR_H__
2 #define __DALI_INTERNAL_PAN_GESTURE_EVENT_PROCESSOR_H__
5 * Copyright (c) 2018 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/internal/event/events/pan-gesture-detector-impl.h>
23 #include <dali/internal/event/events/gesture-processor.h>
24 #include <dali/internal/event/render-tasks/render-task-impl.h>
33 struct PanGestureEvent;
49 * Pan Gesture Event Processing:
51 * When we receive a pan gesture event, we do the following:
52 * - Find the actor that requires a pan where the pan started from (i.e. the down position).
53 * - Emit the gesture if the event satisfies the detector conditions.
55 * The above is only checked when our gesture starts. We continue sending the pan gesture to the
56 * same actor and detector until the pan ends or is cancelled.
58 class PanGestureProcessor : public GestureProcessor
63 * Create a pan gesture processor.
64 * @param[in] gestureManager The gesture manager
65 * @param[in] updateManager The Update Manager
67 PanGestureProcessor( Integration::GestureManager& gestureManager, SceneGraph::UpdateManager& updateManager );
72 virtual ~PanGestureProcessor();
74 public: // To be called by GestureEventProcessor
77 * This method is called whenever a pan gesture event occurs.
78 * @param[in] scene The scene the pan gesture event occurs in.
79 * @param[in] panEvent The event that has occurred.
81 void Process( Scene& scene, const Integration::PanGestureEvent& panEvent );
84 * Adds a gesture detector to this gesture processor.
85 * If this is the first gesture detector being added, then this method registers the required
86 * gesture with the adaptor.
87 * @param[in] gestureDetector The gesture detector being added.
89 void AddGestureDetector( PanGestureDetector* gestureDetector );
92 * Removes the specified gesture detector from this gesture processor. If, after removing this
93 * gesture detector, there are no more gesture detectors registered, then this method unregisters
94 * the gesture from the adaptor.
95 * @param[in] gestureDetector The gesture detector being removed.
97 void RemoveGestureDetector( PanGestureDetector* gestureDetector );
100 * This method updates the gesture detection parameters.
101 * @param[in] gestureDetector The gesture detector that has been updated.
103 void GestureDetectorUpdated( PanGestureDetector* gestureDetector );
106 * Sets the pan gesture properties stored in the scene object directly,
107 * @param[in] pan The pan gesture to override the properties with.
108 * @note If we are already processing a normal pan, then this call is ignored.
110 void SetPanGestureProperties( const PanGesture& pan );
113 * Called to provide pan-gesture profiling information.
115 void EnableProfiling();
118 * Called to set the prediction mode for pan gestures
120 * @param[in] mode The prediction mode
124 * 1 - Prediction using average acceleration
126 void SetPredictionMode(int mode);
129 * @brief Sets the prediction amount of the pan gesture
131 * @param[in] amount The prediction amount in milliseconds
133 void SetPredictionAmount(unsigned int amount);
136 * @brief Sets the upper bound of the prediction amount for clamping
138 * @param[in] amount The prediction amount in milliseconds
140 void SetMaximumPredictionAmount(unsigned int amount);
143 * @brief Sets the lower bound of the prediction amount for clamping
145 * @param[in] amount The prediction amount in milliseconds
147 void SetMinimumPredictionAmount(unsigned int amount);
150 * @brief Sets the amount of prediction interpolation to adjust when the pan velocity is changed
152 * @param[in] amount The prediction amount in milliseconds
154 void SetPredictionAmountAdjustment(unsigned int amount);
157 * Called to set the prediction mode for pan gestures
159 * @param[in] mode The prediction mode
163 * 1 - average between last 2 values
165 void SetSmoothingMode(int mode);
168 * @brief Sets the smoothing amount of the pan gesture
170 * @param[in] amount The smotthing amount from 0.0f (none) to 1.0f (full)
172 void SetSmoothingAmount(float amount);
175 * @brief Sets whether to use actual times of the real gesture and frames or not.
177 * @param[in] value True = use actual times, False = use perfect values
179 void SetUseActualTimes( bool value );
182 * @brief Sets the interpolation time range (ms) of past points to use (with weights) when interpolating.
184 * @param[in] value Time range in ms
186 void SetInterpolationTimeRange( int value );
189 * @brief Sets whether to use scalar only prediction, which when enabled, ignores acceleration.
191 * @param[in] value True = use scalar prediction only
193 void SetScalarOnlyPredictionEnabled( bool value );
196 * @brief Sets whether to use two point prediction. This combines two interpolated points to get more steady acceleration and velocity values.
198 * @param[in] value True = use two point prediction
200 void SetTwoPointPredictionEnabled( bool value );
203 * @brief Sets the time in the past to interpolate the second point when using two point interpolation.
205 * @param[in] value Time in past in ms
207 void SetTwoPointInterpolatePastTime( int value );
210 * @brief Sets the two point velocity bias. This is the ratio of first and second points to use for velocity.
212 * @param[in] value 0.0f = 100% first point. 1.0f = 100% of second point.
214 void SetTwoPointVelocityBias( float value );
217 * @brief Sets the two point acceleration bias. This is the ratio of first and second points to use for acceleration.
219 * @param[in] value 0.0f = 100% first point. 1.0f = 100% of second point.
221 void SetTwoPointAccelerationBias( float value );
224 * @brief Sets the range of time (ms) of points in the history to perform multitap smoothing with (if enabled).
226 * @param[in] value Time in past in ms
228 void SetMultitapSmoothingRange( int value );
230 public: // for PanGestureDetector
233 * @return the pan gesture scene object
235 const SceneGraph::PanGesture& GetSceneObject() const;
240 PanGestureProcessor( const PanGestureProcessor& );
241 PanGestureProcessor& operator=( const PanGestureProcessor& rhs );
244 * Iterates through our GestureDetectors and determines if we need to ask the adaptor to update
245 * its detection policy. If it does, it sends the appropriate gesture update request to adaptor.
247 void UpdateDetection();
250 * Creates a PanGesture and asks the specified detector to emit its detected signal.
251 * @param[in] actor The actor that has been panned.
252 * @param[in] gestureDetectors The gesture detector container that should emit the signal.
253 * @param[in] panEvent The panEvent received from the adaptor.
254 * @param[in] localCurrent Current position relative to the actor attached to the detector.
255 * @param[in] state The state of the gesture.
256 * @param[in] renderTask The renderTask to use.
258 void EmitPanSignal( Actor* actor,
259 const GestureDetectorContainer& gestureDetectors,
260 const Integration::PanGestureEvent& panEvent,
261 Vector2 localCurrent,
262 Gesture::State state,
263 RenderTaskPtr renderTask );
265 // GestureProcessor overrides
268 * @copydoc GestureProcessor::OnGesturedActorStageDisconnection()
270 void OnGesturedActorStageDisconnection();
273 * @copydoc GestureProcessor::CheckGestureDetector()
275 bool CheckGestureDetector( GestureDetector* detector, Actor* actor );
278 * @copydoc GestureProcessor::EmitGestureSignal()
280 void EmitGestureSignal( Actor* actor, const GestureDetectorContainer& gestureDetectors, Vector2 actorCoordinates );
284 Integration::GestureManager& mGestureManager;
285 PanGestureDetectorContainer mGestureDetectors;
286 GestureDetectorContainer mCurrentPanEmitters;
287 RenderTaskPtr mCurrentRenderTask;
288 Vector2 mPossiblePanPosition;
290 uint32_t mMinTouchesRequired;
291 uint32_t mMaxTouchesRequired;
293 Vector2 mLastVelocity; ///< The last recorded velocity in local actor coordinates.
294 Vector2 mLastScreenVelocity; ///< The last recorded velocity in screen coordinates.
296 const Integration::PanGestureEvent* mCurrentPanEvent; ///< Pointer to current PanEvent, used when calling ProcessAndEmit()
297 SceneGraph::PanGesture* mSceneObject; ///< Not owned, but we write to it directly
300 } // namespace Internal
304 #endif // __DALI_INTERNAL_PAN_GESTURE_EVENT_PROCESSOR_H__