intuitive histogram control

Author: esq4

src/iop/exposure.c

@@ -840,7 +840,7 @@ static void _exposure_proxy_handle_event(int n_press,
                                   ? g->deflicker_target_level : g->exposure);
     const float val = dt_bauhaus_slider_get(widget);
     const float accel = dt_accel_get_speed_multiplier(widget, state);
-    if(is_blackpoint)
+    if(!is_blackpoint)
       delta = -delta;
 
     if(n_press == 2)
@@ -854,7 +854,7 @@ static void _exposure_proxy_handle_event(int n_press,
     { // drag
       const float s_min = dt_bauhaus_slider_get_soft_min(widget);
       const float s_max = dt_bauhaus_slider_get_soft_max(widget);
-      dt_bauhaus_slider_set(widget, val + delta * (s_max - s_min) * accel);
+      dt_bauhaus_slider_set(widget, val - delta * (s_max - s_min) * accel);
     }
 
     gchar *text = dt_bauhaus_slider_get_text(widget, dt_bauhaus_slider_get(widget));