Use working color space to draw ColorSliders (#1576)

src/app/ui/color_sliders.cpp

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -8,6 +9,8 @@
 #include "config.h"
 #endif
 
+#include "app/app.h"
+#include "app/color_spaces.h"
 #include "app/color_utils.h"
 #include "app/modules/gfx.h"
 #include "app/ui/color_sliders.h"
@@ -55,6 +58,9 @@ namespace {
         return;
       }
 
+      // Color space conversion
+      auto convertColor = convert_from_current_to_screen_color_space();
+
       gfx::Color color = gfx::ColorNone;
       int w = MAX(rc.w-1, 1);
 
@@ -113,7 +119,7 @@ namespace {
               app::Color::fromGray(255 * x / w));
             break;
         }
-        g->drawVLine(color, rc.x+x, rc.y, rc.h);
+        g->drawVLine(convertColor(color), rc.x+x, rc.y, rc.h);
       }
     }
 
@@ -251,6 +257,9 @@ ColorSliders::ColorSliders()
   addSlider(Channel::HslLightness,  "L", 0, 100, -100, 100);
   addSlider(Channel::Gray,          "V", 0, 255, -100, 100);
   addSlider(Channel::Alpha,         "A", 0, 255, -100, 100);
+
+  m_appConn = App::instance()
+    ->ColorSpaceChange.connect([this]{ invalidate(); });
 }
 
 void ColorSliders::setColor(const app::Color& color)

src/app/ui/color_sliders.h

@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (c) 2018  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -9,6 +10,7 @@
 #pragma once
 
 #include "app/color.h"
+#include "obs/connection.h"
 #include "obs/signal.h"
 #include "ui/event.h"
 #include "ui/grid.h"
@@ -88,6 +90,7 @@ namespace app {
     int m_lockSlider;
     int m_lockEntry;
     app::Color m_color;
+    obs::scoped_connection m_appConn;
   };
 
   //////////////////////////////////////////////////////////////////////