Native (Zenity) file dialogs for Linux

core/src/mindustry/ui/dialogs/FileChooser.java

@@ -20,7 +20,7 @@ public class FileChooser extends BaseDialog{
     private static final Fi homeDirectory = Core.files.absolute(Core.files.getExternalStoragePath());
     static Fi lastDirectory = Core.files.absolute(Core.settings.getString("lastDirectory", homeDirectory.absolutePath()));
 
-    Fi directory = lastDirectory;
+    Fi directory;
     private Table files;
     private ScrollPane pane;
     private TextField navigation, filefield;
@@ -37,10 +37,7 @@ public class FileChooser extends BaseDialog{
         this.filter = filter;
         this.selectListener = result;
 
-        if(!lastDirectory.exists()){
-            lastDirectory = homeDirectory;
-            directory = lastDirectory;
-        }
+        directory = getLastDirectory();
 
         onResize(() -> {
             cont.clear();
@@ -254,11 +251,18 @@ public class FileChooser extends BaseDialog{
         if(open) filefield.clearText();
     }
 
-    public static void setLastDirectory(Fi directory){
+    public static synchronized void setLastDirectory(Fi directory){
         lastDirectory = directory;
         Core.settings.put("lastDirectory", directory.absolutePath());
     }
 
+    public static synchronized Fi getLastDirectory(){
+        if(!lastDirectory.exists()){
+            lastDirectory = homeDirectory;
+        }
+        return lastDirectory;
+    }
+
     public class FileHistory{
         private Seq<Fi> history = new Seq<>();
         private int index;