Added GSH game server data containing class, stub Account and Join Server dialogs, support 'lazy loading' remote images (downloading images in the background then calling a callback to replace temp image if host element is still in layout), misc. other changes.

lib/gui_ext.rb

@@ -6,7 +6,11 @@ module W3DHubLauncher
     def safe_get_image(path, retro: false)
       raise RuntimeError, "Images may only be loaded from the main thread!" unless Thread.current == Thread.main
 
-      return get_image(path, retro: retro) if File.exist?(path)
+      begin
+        return get_image(path, retro: retro) if File.exist?(path)
+      rescue RuntimeError => e
+        pp e
+      end
 
       path = "#{ROOT_PATH}/media/default.png"
       return get_image(path, retro: retro) if File.exist?(path)
@@ -24,6 +28,30 @@ module W3DHubLauncher
       end
     end
 
+    # Downloads requested url and on success check if host element is still in the layout and call the block if so.
+    def remote_image(path, url:, element:, &block)
+      memcache_key = :"lock_net_download_#{element.style.tag}"
+
+      if !File.exist?(path) && MemCache[memcache_key].nil?
+        MemCache[memcache_key] = true
+
+        Worker::Api.download_url(url, path) do |result|
+          # ignore progress reports
+          next unless result.okay? && result.data == true
+
+          MemCache.delete(memcache_key)
+          # does the target element still exist in the layout?
+          e = find_element_by_tag(element.root, element.style.tag)
+
+          next unless e
+
+          if result.okay?
+            block.call(element, path)
+          end
+        end
+      end
+    end
+
     def on_main_thread(block)
       window.add_to_queue(block)
     end