src/view/gesture_detector.cpp

   1 /* Copyright (c) 2010-2014 Samsung Electronics Co., Ltd. All rights reserved.
   2  *
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17
  18 #include "gesture_detector.h"
  19 #include <glib.h>
  20 #include <math.h>
  21
  22
  23 extern bool _maps_view_is_gesture_available(maps_view_h view,
  24                                            maps_view_gesture_e gesture);
  25
  26
  27 /*----------------------------------------------------------------------------*/
  28
  29 int view::gesture_detector::__CLICK_AREA = 50;
  30
  31 view::gesture_detector::gesture_detector(maps_view_h v)
  32         : _view(v)
  33         , _gp(this)
  34         , _tap_timer(NULL)
  35         , _long_press_timer(NULL)
  36 {
  37         int dpi;
  38         if (maps_get_screen_dpi(&dpi) == MAPS_ERROR_NONE)
  39                 __CLICK_AREA = dpi / 5; /* expected about 0.5cm */
  40 }
  41
  42 view::gesture_detector::~gesture_detector()
  43 {
  44         stop_tap_timer();
  45         stop_long_press_timer();
  46 }
  47
  48 void view::gesture_detector::halt_gesture()
  49 {
  50 }
  51
  52 void view::gesture_detector::reset()
  53 {
  54         MAPS_LOGI("%c[%d;%d;%dm"
  55                   "%s"
  56                   "%c[%d;%d;%dm",
  57                   0x1B, 1, 41, FG_GREEN,
  58                   "RESET RUNTIME INFO",
  59                   0x1B, 0, 0, 0);
  60
  61         /* Store the previous gesture data for possible future analysis */
  62         _info_history = _info;
  63
  64         /* Save Map View state for complex multi-click gestures */
  65         const map_state saved_state = _info._start_view_state;
  66
  67         /* Reset current gesture info */
  68         _info.reset();
  69
  70         /* We would use this state in the complex gestures */
  71         _info._start_view_state = saved_state;
  72
  73         /* There is definitelly not long enough for "long press" gesture */
  74         stop_long_press_timer();
  75
  76         /*MAPS_LOGI("Historic timestamps: tap: %d, move: %d, up: %d",
  77                   _info_history._finger_down[0]._timestamp,
  78                   _info_history._finger_move[0]._timestamp,
  79                   _info_history._finger_up[0]._timestamp);*/
  80 }
  81
  82 void view::gesture_detector::tap(int finger_no, const touch_point &tp)
  83 {
  84 }
  85
  86 void view::gesture_detector::up(int finger_no, const touch_point &tp)
  87 {
  88 }
  89
  90 void view::gesture_detector::move(int finger_no, const touch_point &tp)
  91 {
  92 }
  93
  94 void view::gesture_detector::on_tap_timer()
  95 {
  96 }
  97
  98 void view::gesture_detector::start_tap_timer()
  99 {
 100         log("START TAP TIMER", FG_MAGENTA);
 101         if(_tap_timer)
 102                 stop_tap_timer();
 103         _tap_timer = ecore_timer_add(__TAP_DURATION,
 104                                         __on_tap_timer,
 105                                         this);
 106 }
 107
 108 void view::gesture_detector::stop_tap_timer()
 109 {
 110         log("STOP TAP TIMER", FG_MAGENTA);
 111         if(_tap_timer)
 112                 ecore_timer_del(_tap_timer);
 113         _tap_timer = NULL;
 114 }
 115
 116 Eina_Bool view::gesture_detector::__on_tap_timer(void *data)
 117 {
 118         gesture_detector *d = (gesture_detector *)data;
 119         if (!d)
 120                 return ECORE_CALLBACK_CANCEL;
 121
 122         d->log("------- TAP TIMER EVENT -------", FG_MAGENTA);
 123         d->_tap_timer = NULL;
 124         d->on_tap_timer();
 125
 126         return ECORE_CALLBACK_CANCEL;
 127 }
 128
 129 void view::gesture_detector::on_long_press_timer()
 130 {
 131 }
 132
 133 void view::gesture_detector::start_long_press_timer()
 134 {
 135         log("START LONG PRESS TIMER", FG_MAGENTA);
 136         if(_long_press_timer)
 137                 stop_long_press_timer();
 138         _long_press_timer = ecore_timer_add(__LONG_PRESS_DURATION,
 139                                             __on_long_press_timer,
 140                                             this);
 141 }
 142
 143 void view::gesture_detector::stop_long_press_timer()
 144 {
 145         log("STOP LONG PRESS TIMER", FG_MAGENTA);
 146         if(_long_press_timer)
 147                 ecore_timer_del(_long_press_timer);
 148         _long_press_timer = NULL;
 149 }
 150
 151 Eina_Bool view::gesture_detector::__on_long_press_timer(void *data)
 152 {
 153         gesture_detector *d = (gesture_detector *)data;
 154         if (!d)
 155                 return ECORE_CALLBACK_CANCEL;
 156
 157         d->log("------- LONG PRESS TIMER EVENT -------", FG_MAGENTA);
 158         d->_long_press_timer = NULL;
 159         d->on_long_press_timer();
 160
 161         return ECORE_CALLBACK_CANCEL;
 162 }
 163
 164 bool view::gesture_detector::is_gesture_available(maps_view_gesture_e gesture)
 165 {
 166         return _maps_view_is_gesture_available(_view, gesture);
 167 }
 168
 169 bool view::gesture_detector::finger_dragged_enough(int finger_no)
 170 {
 171         const touch_point p1 = _info._finger_down[finger_no];
 172         const touch_point p2 = _info._finger_move[finger_no];
 173         return (get_trajectory_effective_length(p1, p2) >= __CLICK_AREA);
 174 }
 175
 176 bool view::gesture_detector::finger_pressed_enough(int finger_no,
 177                                                    unsigned int duration_min,
 178                                                    unsigned int duration_max)
 179 {
 180         unsigned int press_time = _info._finger_down[finger_no]._timestamp;
 181         unsigned int up_time = _info._finger_up[finger_no]._timestamp;
 182
 183         unsigned int press_duration_tmp = up_time - press_time;
 184         MAPS_LOGI("finger_pressed_enough: finger: %d, press: %d, up: %d [%d]",
 185                   finger_no, press_time, up_time, press_duration_tmp);
 186
 187         if(up_time < press_time)
 188                 return false; /* Not yet unpressed */
 189         unsigned int press_duration = up_time - press_time;
 190         if ((press_duration >= duration_min) && (press_duration <= duration_max))
 191                 return true;
 192         return false;
 193 }
 194
 195 int view::gesture_detector::get_trajectory_effective_length(
 196                                                         const touch_point &p1,
 197                                                         const touch_point &p2)
 198 {
 199         int dx = p2._x - p1._x;
 200         int dy = p2._y - p1._y;
 201         int etl = sqrt(dx * dx + dy * dy);
 202         return etl;
 203 }
 204
 205 void view::gesture_detector::log(const char *str, log_colors color)
 206 {
 207         MAPS_LOGI("%c[%d;%d;%dm"
 208                   "%s"
 209                   "%c[%d;%d;%dm",
 210                   0x1B, 1, 0, color,
 211                   str,
 212                   0x1B, 0, 0, 0);
 213 }
 214
 215
 216 void view::gesture_detector::log_map_center(int color)
 217 {
 218         maps_coordinates_h central_coords = NULL;
 219         maps_view_get_center(_view, &central_coords);
 220         double lat = .0, lon = .0;
 221         maps_coordinates_get_latitude_longitude(central_coords, &lat, &lon);
 222         maps_coordinates_destroy(central_coords);
 223         MAPS_LOGI("%c[%d;%d;%dm"
 224                   "central coordinates: (%f, %f)"
 225                   "%c[%d;%d;%dm",
 226                   0x1B, 1, 0, color,
 227                   lat, lon,
 228                   0x1B, 0, 0, 0);
 229 }