Update status name to match what fluidd is expecting.

docs/Status_Reference.md

@@ -478,7 +478,7 @@ The following information is available in the `tool` object:
  - `toolchanger`: The name of the toolchanger this tool is attached to. 
  - `extruder`: Name of the extruder used for this tool.
  - `fan`: Name of the part fan used for this tool.
- - `selected`: If this tool is currently the selected tool.
+ - `active`: If this tool is currently the selected tool.
  - `mounted`: If this tool is currently mounted, the tool may be mounted but
    not selected. Some reasons for that can be that a child tool is selected, or
    lazy unmounting is configured.  

klippy/extras/tool.py

@@ -55,7 +55,7 @@ def get_status(self, eventtime):
                 'tool_number': self.tool_number,
                 'extruder': self.extruder_name,
                 'fan': self.fan_name,
-                'selected': self.toolchanger.get_selected_tool() == self,
+                'active': self.toolchanger.get_selected_tool() == self,
                 'gcode_x_offset': self.gcode_x_offset if self.gcode_x_offset else 0.0,
                 'gcode_y_offset': self.gcode_y_offset if self.gcode_y_offset else 0.0,
                 'gcode_z_offset': self.gcode_z_offset if self.gcode_z_offset else 0.0,
@@ -77,10 +77,17 @@ def assign_tool(self, number, replace = False):
         self.tool_number = number
         self.toolchanger.assign_tool(self, number, prev_number, replace)
         gcode = self.printer.lookup_object('gcode')
-        gcode.register_command('T%d' % (number), None)
-        gcode.register_command('T%d' % (number), self.cmd_T, desc=self.cmd_T_help)
+        cmd_name = 'T%d' % (number)
+        gcode.register_command(cmd_name, None)
+        gcode.register_command(cmd_name, self.cmd_T, desc=self.cmd_T_help % (number))
+        # Pretend to be a macro, to allow discovery by UIs.
+        macro_obj_name = "gcode_macro %s" % (cmd_name,)
+        if macro_obj_name not in self.printer.objects:
+            self.printer.add_object(macro_obj_name, self)
+        else:
+            self.printer.lookup_object(macro_obj_name).set_tool(self)
 
-    cmd_T_help = 'Select tool'
+    cmd_T_help = 'Select tool %d'
     def cmd_T(self, gcmd):
         self.toolchanger.select_tool(gcmd, self, self.t_command_restore_axis)
 
@@ -91,6 +98,16 @@ def _config_getfloat(self, config, name, default_value):
     def _config_getboolean(self, config, name, default_value):
         return config.getboolean(name, self.toolchanger.config.getboolean(name, default_value))
 
+# A placeholder object to emulate gcode macro.
+class ToolMacro:
+    def __init__(self, tool):
+        self.tool = tool
+    def set_tool(self, tool):
+        self.tool = tool
+    def get_status(self, eventtime):
+        if self.tool is None:
+            return {}
+        return self.tool.get_status(eventtime)
 
 def load_config_prefix(config):
     return Tool(config)