Implement play buttons for a folder with music

lua/file_browser.lua

@@ -60,6 +60,72 @@ return screen:new {
       }
     end
 
+    local enqueue_fs_iterator = function(it)
+      local cnt = 0
+      while true do
+        it:next()
+        local item = it:value()
+        if item == nil then
+          break
+        end
+
+        if not item:is_directory() and not playlist_iterator:is_playlist(item) and playback.is_playable(item:filepath()) then
+          queue.add(item:filepath())
+        end
+
+        -- safety
+        cnt = cnt + 1
+        if cnt > 1000 then
+          break
+        end
+      end
+    end
+
+    -- copied from browser.lua
+    local buttons = header:Object({
+      flex = {
+        flex_direction = "row",
+        flex_wrap = "wrap",
+        justify_content = "space-between",
+        align_items = "center",
+        align_content = "center"
+      },
+      w = lvgl.PCT(100),
+      h = lvgl.SIZE_CONTENT,
+      pad_column = 4
+    })
+    local original_iterator = self.iterator:clone()
+    local enqueue = widgets.IconBtn(buttons, img.enqueue, "Enqueue")
+    enqueue:onClicked(function()
+      -- queue.add(original_iterator)
+      enqueue_fs_iterator(original_iterator)
+      playback.playing:set(true)
+    end)
+    local shuffle_play = widgets.IconBtn(buttons, img.shuffleplay, "Shuffle")
+    shuffle_play:onClicked(function()
+      queue.clear()
+      queue.random:set(true)
+      --queue.add(original_iterator)
+      enqueue_fs_iterator(original_iterator)
+      playback.playing:set(true)
+      backstack.push(playing:new())
+    end)
+    -- enqueue:add_flag(lvgl.FLAG.HIDDEN)
+    local play = widgets.IconBtn(buttons, img.play_small, "Play")
+    play:onClicked(function()
+      queue.clear()
+      queue.random:set(false)
+      --queue.add(original_iterator)
+      enqueue_fs_iterator(original_iterator)
+      playback.playing:set(true)
+      backstack.push(playing:new())
+    end)
+
+
+
+
+
+
     local get_icon_func = function(item)
       if item:is_directory() then
         return img.file_directory