Made zoom delta configurable

Author: Robin Müller

src/configuraion.c

@@ -85,6 +85,7 @@ configuration_t read_config(const char *filename) {
   result.vert_threshold_percentage = iniparser_getint(ini, "thresholds:vertical", 15);
   result.horz_threshold_percentage = iniparser_getint(ini, "thresholds:horizontal", 15);
   result.zoom.enabled = iniparser_getboolean(ini, "zoom:enabled", false);
+  result.zoom.delta = (uint8_t) iniparser_getint(ini, "zoom:delta", 200);
 
   uint8_t i, j;
   for (i = 0; i < MAX_FINGERS; i++) {

src/configuraion.h

@@ -49,6 +49,7 @@ typedef struct configuration {
   } scroll;
   struct zoom_options {
     bool enabled;
+    uint8_t delta;
   } zoom;
   uint8_t vert_threshold_percentage;
   uint8_t horz_threshold_percentage;

src/gesture_detection.c

@@ -304,8 +304,7 @@ static input_event_array_t *process_syn_event(struct input_event event,
 
     if (current_gesture == ZOOM) {
       double finger_distance = calculate_distance(mt_slots.points[0], mt_slots.points[1]);
-      // TODO make zoom delta configurable
-      result = do_zoom(finger_distance - last_zoom_distance, 200);
+      result = do_zoom(finger_distance - last_zoom_distance, config.zoom.delta);
       last_zoom_distance = finger_distance;
     } else {
       int32_t x_distance, y_distance;