Option to save flicker-free dimming per AC/DC state #3112

app/AppConfig.cs

@@ -691,4 +691,9 @@ public static bool IsForceMiniled()
         return ContainsModel("G834JYR") || Is("force_miniled");
     }
 
+    public static bool SaveDimming()
+    {
+        return Is("save_dimming");
+    }
+
 }

app/Display/VisualControl.cs

@@ -323,14 +323,32 @@ private static void BrightnessTimerTimer_Elapsed(object? sender, System.Timers.E
             SetGamma(_brightness);
         }
 
+        public static void InitBrightness()
+        {
+            if (!AppConfig.IsOLED()) return;
+            if (!AppConfig.SaveDimming()) return;
+
+            int brightness = GetBrightness();
+            if (brightness >= 0) SetBrightness(brightness);
+        }
+
+        private static bool IsOnBattery()
+        {
+            return AppConfig.SaveDimming() && SystemInformation.PowerStatus.PowerLineStatus != PowerLineStatus.Online;
+        }
+
+        public static int GetBrightness()
+        {
+            return AppConfig.Get(IsOnBattery() ? "brightness_battery" : "brightness", 100);
+        }
+
         public static int SetBrightness(int brightness = -1, int delta = 0)
         {
             if (!AppConfig.IsOLED()) return -1;
-
-            if (brightness < 0) brightness = AppConfig.Get("brightness", 100);
+            if (brightness < 0) GetBrightness();
 
             _brightness = Math.Max(0, Math.Min(100, brightness + delta));
-            AppConfig.Set("brightness", _brightness);
+            AppConfig.Set(IsOnBattery() ? "brightness_battery" : "brightness", _brightness);
 
             brightnessTimer.Start();
 

app/Program.cs

@@ -256,6 +256,8 @@ public static bool SetAutoModes(bool powerChanged = false, bool init = false)
                 settingsForm.AutoKeyboard();
             }
 
+            VisualControl.InitBrightness();
+
             return true;
         }
 

app/Settings.cs

@@ -453,7 +453,7 @@ public void VisualiseBrightness()
             Invoke(delegate
             {
                 sliderGammaIgnore = true;
-                sliderGamma.Value = AppConfig.Get("brightness", 100);
+                sliderGamma.Value = VisualControl.GetBrightness();
                 labelGamma.Text = sliderGamma.Value + "%";
                 sliderGammaIgnore = false;
             });