1 #ifndef DALI_INTERNAL_GESTURE_EVENT_PROCESSOR_H
2 #define DALI_INTERNAL_GESTURE_EVENT_PROCESSOR_H
5 * Copyright (c) 2019 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/public-api/actors/actor.h>
23 #include <dali/internal/event/events/gesture-detector-impl.h>
24 #include <dali/internal/event/events/long-press-gesture-processor.h>
25 #include <dali/internal/event/events/pan-gesture-processor.h>
26 #include <dali/internal/event/events/pinch-gesture-processor.h>
27 #include <dali/internal/event/events/tap-gesture-processor.h>
37 class RenderController;
52 * Gesture Event Processing:
54 * The GestureEventProcessor determines what type of gesture event we have received and sends it to
55 * the appropriate gesture processor for processing.
57 class GestureEventProcessor
62 * Create a gesture event processor.
63 * @param[in] updateManager The update manager
64 * @param[in] gestureManager The gesture manager
65 * @param[in] renderController The render controller
67 GestureEventProcessor( SceneGraph::UpdateManager& updateManager, Integration::RenderController& renderController );
70 * Non-virtual destructor; GestureProcessor is not a base class
72 ~GestureEventProcessor();
74 public: // To be called by EventProcessor
77 * This function is called by Core whenever a touch event occurs
78 * @param[in] scene The scene
79 * @param[in] event The event that has occurred
81 void ProcessTouchEvent( Scene& scene, const Integration::TouchEvent& event);
83 public: // To be called by gesture detectors
86 * This method adds the specified gesture detector to the relevant gesture processor.
87 * @param[in] gestureDetector The gesture detector to add
89 void AddGestureDetector(GestureDetector* gestureDetector, Scene& scene);
92 * This method removes the specified gesture detector from the relevant gesture processor.
93 * @param[in] gestureDetector The gesture detector to remove.
95 void RemoveGestureDetector(GestureDetector* gestureDetector);
98 * This method informs the appropriate processor that the gesture detector has been updated.
99 * @param[in] gestureDetector The gesture detector that has been updated.
101 void GestureDetectorUpdated(GestureDetector* gestureDetector);
104 * Called by GestureDetectors to set the gesture properties in the update thread.
105 * @param[in] gesture The gesture whose values will be used in the Update object.
106 * @note If we are in the middle of processing the gesture being set, then this call is ignored.
108 void SetGestureProperties( const Gesture& gesture );
110 public: // Called by Core
113 * Returns true if any GestureDetector requires a Core::Update. Clears
114 * the state flag after reading.
116 * @return true if any GestureDetector requires a Core::Update
121 * Called to provide pan-gesture profiling information.
123 void EnablePanGestureProfiling();
126 * @brief Called to set how pan gestures predict input
128 * @param[in] mode The prediction mode to use
130 void SetPanGesturePredictionMode( int32_t mode );
133 * @brief Sets the prediction amount of the pan gesture
135 * @param[in] amount The prediction amount in milliseconds
137 void SetPanGesturePredictionAmount( uint32_t amount );
140 * @brief Sets the upper bound of the prediction amount for clamping
142 * @param[in] amount The prediction amount in milliseconds
144 void SetPanGestureMaximumPredictionAmount( uint32_t amount );
147 * @brief Sets the lower bound of the prediction amount for clamping
149 * @param[in] amount The prediction amount in milliseconds
151 void SetPanGestureMinimumPredictionAmount( uint32_t amount );
154 * @brief Sets the prediction amount to adjust when the pan velocity is changed.
155 * If the pan velocity is accelerating, the prediction amount will be increased
156 * by the specified amount until it reaches the upper bound. If the pan velocity
157 * is decelerating, the prediction amount will be decreased by the specified amount
158 * until it reaches the lower bound.
160 * @param[in] amount The prediction amount in milliseconds
162 void SetPanGesturePredictionAmountAdjustment( uint32_t amount );
165 * @brief Called to set how pan gestures smooth input
167 * @param[in] mode The smoothing mode to use
169 void SetPanGestureSmoothingMode( int32_t mode );
172 * @brief Sets the prediction amount of the pan gesture
174 * @param[in] amount The smoothing amount [0.0f,1.0f] - 0.0f would be no smoothing, 1.0f maximum smoothing
176 void SetPanGestureSmoothingAmount( float amount );
179 * @brief Sets whether to use actual times of the real gesture and frames or not.
181 * @param[in] value True = use actual times, False = use perfect values
183 void SetPanGestureUseActualTimes( bool value );
186 * @brief Sets the interpolation time range (ms) of past points to use (with weights) when interpolating.
188 * @param[in] value Time range in ms
190 void SetPanGestureInterpolationTimeRange( int32_t value );
193 * @brief Sets whether to use scalar only prediction, which when enabled, ignores acceleration.
195 * @param[in] value True = use scalar prediction only
197 void SetPanGestureScalarOnlyPredictionEnabled( bool value );
200 * @brief Sets whether to use two point prediction. This combines two interpolated points to get more steady acceleration and velocity values.
202 * @param[in] value True = use two point prediction
204 void SetPanGestureTwoPointPredictionEnabled( bool value );
207 * @brief Sets the time in the past to interpolate the second point when using two point interpolation.
209 * @param[in] value Time in past in ms
211 void SetPanGestureTwoPointInterpolatePastTime( int32_t value );
214 * @brief Sets the two point velocity bias. This is the ratio of first and second points to use for velocity.
216 * @param[in] value 0.0f = 100% first point. 1.0f = 100% of second point.
218 void SetPanGestureTwoPointVelocityBias( float value );
221 * @brief Sets the two point acceleration bias. This is the ratio of first and second points to use for acceleration.
223 * @param[in] value 0.0f = 100% first point. 1.0f = 100% of second point.
225 void SetPanGestureTwoPointAccelerationBias( float value );
228 * @brief Sets the range of time (ms) of points in the history to perform multitap smoothing with (if enabled).
230 * @param[in] value Time in past in ms
232 void SetPanGestureMultitapSmoothingRange( int32_t value );
235 * @brief Sets the minimum distance required to start a pan event
237 * @param[in] value Distance in pixels
239 void SetPanGestureMinimumDistance( int32_t value );
242 * @brief Sets the minimum number of touch events required to start a pan
244 * @param[in] value Number of touch events
246 void SetPanGestureMinimumPanEvents( int32_t value );
249 * @brief Sets the minimum distance required to start a pinch event
251 * @param[in] value Distance in pixels
253 void SetPinchGestureMinimumDistance( float value);
255 public: // needed for PanGesture
258 * @return the pan gesture processor
260 const PanGestureProcessor& GetPanGestureProcessor();
265 GestureEventProcessor(const GestureEventProcessor&);
266 GestureEventProcessor& operator=(const GestureEventProcessor& rhs);
270 LongPressGestureProcessor mLongPressGestureProcessor;
271 PanGestureProcessor mPanGestureProcessor;
272 PinchGestureProcessor mPinchGestureProcessor;
273 TapGestureProcessor mTapGestureProcessor;
274 Integration::RenderController& mRenderController;
276 uint32_t mLongPressDetectorCount;
277 uint32_t mPanDetectorCount;
278 uint32_t mPinchDetectorCount;
279 uint32_t mTapDetectorCount;
281 int32_t envOptionMinimumPanDistance;
282 int32_t envOptionMinimumPanEvents;
285 } // namespace Internal
289 #endif // DALI_INTERNAL_GESTURE_EVENT_PROCESSOR_H