修复当正在播放时，投屏设备被强制退出程序，再次查找该设备投屏失败问题，添加所有控制按钮验证是否已选择文件和设备

core/device_list.py

@@ -14,15 +14,17 @@ class DeviceList:
         :return:
         """
         if device["udn"] not in self.list:
-            self.list.setdefault(device["udn"], {"stat":False, "controller": None, "pause": False})
+            self.list.setdefault(device["udn"], {"stat":False, "location":device["location"], "controller": None, "pause": False})
         return self.list[device["udn"]]
 
-    def update_device(self, device, stat, controller = None, pause = None):
+    def update_device(self, device, stat, controller = None, pause = None, location = None):
         """
         更新设备信息
         :param device:设备
         :param stat:设备状态播放 bool
         :param controller:控制对象
+        :param pause: 暂停状态
+        :param location: 设备文档地址
         :return:
         """
         if device["udn"] in self.list:
@@ -33,6 +35,9 @@ class DeviceList:
                 self.list[key].update({"stat":stat,"controller":controller})
             if pause is not None:
                 self.list[key]["pause"] = pause
+            # 设备文档地址
+            if location is not None:
+                self.list[key]["location"] = location
 
         return True