Rework

app/src/main/java/io/xpipe/app/core/window/AppMainWindow.java

@@ -108,7 +108,7 @@ public class AppMainWindow {
         var scene = new Scene(content, -1, -1, false);
         content.prefWidthProperty().bind(scene.widthProperty());
         content.prefHeightProperty().bind(scene.heightProperty());
-        scene.setFill(Color.TRANSPARENT);
+        AppWindowStyle.setSceneFill(scene);
 
         stage.setScene(scene);
         if (AppPrefs.get() != null) {

app/src/main/java/io/xpipe/app/core/window/AppSideWindow.java

@@ -86,7 +86,7 @@ public class AppSideWindow {
         if (AppMainWindow.get() != null && AppMainWindow.get().getStage().isShowing() && !AppMainWindow.get().getStage().isIconified()) {
             alert.initOwner(AppMainWindow.get().getStage());
         }
-        alert.getDialogPane().getScene().setFill(Color.TRANSPARENT);
+        AppWindowStyle.setSceneFill(alert.getDialogPane().getScene());
         var stage = (Stage) alert.getDialogPane().getScene().getWindow();
         AppModifiedStage.prepareStage(stage);
         AppWindowStyle.addIcons(stage);

app/src/main/java/io/xpipe/app/core/window/AppWindowStyle.java

@@ -2,15 +2,18 @@ package io.xpipe.app.core.window;
 
 import io.xpipe.app.core.*;
 import io.xpipe.app.issue.TrackEvent;
+import io.xpipe.app.prefs.AppPrefs;
 import io.xpipe.app.util.GlobalTimer;
 import io.xpipe.core.OsType;
 
 import javafx.application.Platform;
+import javafx.beans.binding.Bindings;
 import javafx.beans.property.SimpleBooleanProperty;
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.css.PseudoClass;
 import javafx.scene.Scene;
 import javafx.scene.input.*;
+import javafx.scene.paint.Color;
 import javafx.stage.Stage;
 
 import java.time.Duration;
@@ -19,6 +22,17 @@ import java.util.List;
 
 public class AppWindowStyle {
 
+    public static void setSceneFill(Scene scene) {
+        if (OsType.ofLocal() != OsType.LINUX) {
+            scene.setFill(Color.TRANSPARENT);
+            return;
+        }
+
+        scene.fillProperty().bind(Bindings.createObjectBinding(() -> {
+            return AppPrefs.get() != null && AppPrefs.get().theme().getValue().isDark() ? Color.BLACK : Color.WHITE;
+        }, AppPrefs.get().theme()));
+    }
+
     public static void addMaximizedPseudoClass(Stage stage) {
         stage.getScene().rootProperty().subscribe(root -> {
             stage.maximizedProperty().subscribe(v -> {

app/src/main/java/io/xpipe/app/util/RemoteDesktopWindow.java

@@ -85,7 +85,7 @@ public class RemoteDesktopWindow {
         stage = new Stage();
         stage.initStyle(StageStyle.UNIFIED);
         var scene = new Scene(new Region());
-        scene.setFill(Color.TRANSPARENT);
+        AppWindowStyle.setSceneFill(scene);
         stage.setScene(scene);
         stage.getScene().setRoot(new RemoteDesktopDockComp().build());
         stage.setWidth(AppMainWindow.get() != null ? AppMainWindow.get().getStage().getWidth() : 1280);