Add a toggle for anti flicker mode in LiveDisplay settings

Change-Id: I4a80af3888c578652bf5e264a62e333cc2162305

3 files changed, 23 insertions, 1 deletions

diff --git a/res/values/strings.xml b/res/values/strings.xml
index eb0d487..021f6ec 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -122,6 +122,8 @@
     <string name="live_display_night">Night</string>
     <string name="live_display_outdoor_mode_title">Automatic outdoor mode</string>
     <string name="live_display_outdoor_mode_summary">Increase brightness and saturation automatically under bright sunlight</string>
+    <string name="live_display_anti_flicker_title">Anti flicker</string>
+    <string name="live_display_anti_flicker_summary">Prevent extensive flickering and reduce eye strain in low light conditions. It might degrade color accuracy and affect the way some items are displayed.</string>
     <string name="live_display_low_power_title">Reduce power consumption</string>
     <string name="live_display_low_power_summary">Adjust display for lowest power consumption without degradation</string>
     <string name="live_display_enhance_color_title">Enhance colors</string>
diff --git a/res/xml/livedisplay.xml b/res/xml/livedisplay.xml
index 15eb1c5..c993fe9 100644
--- a/res/xml/livedisplay.xml
+++ b/res/xml/livedisplay.xml
@@ -44,6 +44,13 @@
             android:summary="@string/live_display_outdoor_mode_summary"
             android:defaultValue="@*lineageos.platform:bool/config_defaultAutoOutdoorMode" />
 
+    <!-- Anti flicker mode / DC dimming -->
+    <lineageos.preference.LineageSystemSettingSwitchPreference
+            android:key="display_anti_flicker"
+            android:title="@string/live_display_anti_flicker_title"
+            android:summary="@string/live_display_anti_flicker_summary"
+            android:defaultValue="false" />
+
     <!-- Reading mode -->
     <lineageos.preference.LineageSystemSettingSwitchPreference
             android:key="display_reading_mode"
diff --git a/src/org/lineageos/lineageparts/livedisplay/LiveDisplaySettings.java b/src/org/lineageos/lineageparts/livedisplay/LiveDisplaySettings.java
index 879bd9a..22cd502 100644
--- a/src/org/lineageos/lineageparts/livedisplay/LiveDisplaySettings.java
+++ b/src/org/lineageos/lineageparts/livedisplay/LiveDisplaySettings.java
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2015 The CyanogenMod Project
- *               2017-2020 The LineageOS Project
+ *               2017-2021 The LineageOS Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -52,6 +52,7 @@ import lineageos.hardware.LiveDisplayManager;
 import lineageos.preference.SettingsHelper;
 import lineageos.providers.LineageSettings;
 
+import static lineageos.hardware.LiveDisplayManager.FEATURE_ANTI_FLICKER;
 import static lineageos.hardware.LiveDisplayManager.FEATURE_CABC;
 import static lineageos.hardware.LiveDisplayManager.FEATURE_COLOR_ADJUSTMENT;
 import static lineageos.hardware.LiveDisplayManager.FEATURE_COLOR_ENHANCEMENT;
@@ -74,6 +75,7 @@ public class LiveDisplaySettings extends SettingsPreferenceFragment implements S
     private static final String KEY_CATEGORY_ADVANCED = "advanced";
 
     private static final String KEY_LIVE_DISPLAY = "live_display";
+    private static final String KEY_LIVE_DISPLAY_ANTI_FLICKER = "display_anti_flicker";
     private static final String KEY_LIVE_DISPLAY_AUTO_OUTDOOR_MODE =
             "display_auto_outdoor_mode";
     private static final String KEY_LIVE_DISPLAY_READING_ENHANCEMENT = "display_reading_mode";
@@ -101,6 +103,7 @@ public class LiveDisplaySettings extends SettingsPreferenceFragment implements S
 
     private ListPreference mLiveDisplay;
 
+    private SwitchPreference mAntiFlicker;
     private SwitchPreference mColorEnhancement;
     private SwitchPreference mLowPower;
     private SwitchPreference mOutdoorMode;
@@ -257,6 +260,13 @@ public class LiveDisplaySettings extends SettingsPreferenceFragment implements S
             advancedPrefs.removePreference(mDisplayColor);
             mDisplayColor = null;
         }
+
+        mAntiFlicker = findPreference(KEY_LIVE_DISPLAY_ANTI_FLICKER);
+        if (liveDisplayPrefs != null && mAntiFlicker != null &&
+                !mHardware.isSupported(LineageHardwareManager.FEATURE_ANTI_FLICKER)) {
+            liveDisplayPrefs.removePreference(mAntiFlicker);
+            mAntiFlicker = null;
+        }
     }
 
     @Override
@@ -444,6 +454,9 @@ public class LiveDisplaySettings extends SettingsPreferenceFragment implements S
                 result.add(KEY_LIVE_DISPLAY_TEMPERATURE);
                 result.add(KEY_LIVE_DISPLAY);
             }
+            if (!config.hasFeature(FEATURE_ANTI_FLICKER)) {
+                result.add(KEY_LIVE_DISPLAY_ANTI_FLICKER);
+            }
 
             return result;
         }