From 2e27035a1633d39cf39184ebf92509b9b8a176d5 Mon Sep 17 00:00:00 2001
From: sergosm <androidkotlin@protonmail.ch>
Date: Tue, 22 Sep 2020 10:55:16 +0300
Subject: [PATCH] Transparency seekbar on the map and UI are not synchronized

---
 OsmAnd/src/net/osmand/plus/dialogs/RasterMapMenu.java |  1 +
 .../osmand/plus/views/layers/MapControlsLayer.java    | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/OsmAnd/src/net/osmand/plus/dialogs/RasterMapMenu.java b/OsmAnd/src/net/osmand/plus/dialogs/RasterMapMenu.java
index 44d50db194..534c334aec 100644
--- a/OsmAnd/src/net/osmand/plus/dialogs/RasterMapMenu.java
+++ b/OsmAnd/src/net/osmand/plus/dialogs/RasterMapMenu.java
@@ -149,6 +149,7 @@ public class RasterMapMenu {
 						@Override
 						public boolean onIntegerValueChangedListener(int newValue) {
 							mapTransparencyPreference.set(newValue);
+							mapActivity.getMapLayers().getMapControlsLayer().updateTransparencySlider();
 							mapActivity.getMapView().refreshMap();
 							return false;
 						}
diff --git a/OsmAnd/src/net/osmand/plus/views/layers/MapControlsLayer.java b/OsmAnd/src/net/osmand/plus/views/layers/MapControlsLayer.java
index 21277e2426..f1c3c1f13a 100644
--- a/OsmAnd/src/net/osmand/plus/views/layers/MapControlsLayer.java
+++ b/OsmAnd/src/net/osmand/plus/views/layers/MapControlsLayer.java
@@ -1068,6 +1068,17 @@ public class MapControlsLayer extends OsmandMapLayer {
 		}
 	}
 
+	public void updateTransparencySlider () {
+		LayerTransparencySeekbarMode seekbarMode = settings.LAYER_TRANSPARENCY_SEEKBAR_MODE.get();
+		if (OsmandPlugin.getEnabledPlugin(OsmandRasterMapsPlugin.class) != null) {
+			if (seekbarMode == LayerTransparencySeekbarMode.OVERLAY && settings.MAP_OVERLAY.get() != null) {
+				transparencySlider.setValue(settings.MAP_OVERLAY_TRANSPARENCY.get());
+			} else if (seekbarMode == LayerTransparencySeekbarMode.UNDERLAY && settings.MAP_UNDERLAY.get() != null) {
+				transparencySlider.setValue(settings.MAP_TRANSPARENCY.get());
+			}
+		}
+	}
+
 	public void showTransparencyBar(CommonPreference<Integer> transparenPreference,
 	                                boolean isTransparencyBarEnabled) {
 		this.isTransparencyBarEnabled = isTransparencyBarEnabled;