add ability to style and template menu buttons (#866)

* add ability to select button style for menu items

* allow for jinja template rendering for (nearly) all menu options
this shuffles params json checks to display time instead of config time

docs/Configuration.md

@@ -133,6 +133,8 @@ A menu item is configured as follows:
 name: Item Name
 icon: home
 # Optional Parameters
+# Icon style, defined as "button.mycolor4" (for example) in the theme css
+style: mycolor4
 # Panel from the panels listed below
 panel: preheat
 # Moonraker method to call when the item is selected

ks_includes/config.py

@@ -175,7 +175,7 @@ class KlipperScreenConfig:
                 strs = ('gcode', '')
                 numbers = [f'{option}' for option in self.config[section] if option != 'gcode']
             elif section.startswith('menu '):
-                strs = ('name', 'icon', 'panel', 'method', 'params', 'enable', 'confirm')
+                strs = ('name', 'icon', 'panel', 'method', 'params', 'enable', 'confirm', 'style')
             elif section == 'bed_screws':
                 # This section may be deprecated in favor of moving this options under the printer section
                 numbers = ('rotation', '')
@@ -549,13 +549,9 @@ class KlipperScreenConfig:
             "panel": cfg.get("panel", None),
             "method": cfg.get("method", None),
             "confirm": cfg.get("confirm", None),
-            "enable": cfg.get("enable", "True")
+            "enable": cfg.get("enable", "True"),
+            "params": cfg.get("params", "{}"),
+            "style": cfg.get("style", None)
         }
 
-        try:
-            item["params"] = json.loads(cfg.get("params", "{}"))
-        except Exception as e:
-            logging.exception(f"Unable to parse parameters for [{name}]:\n{e}")
-            item["params"] = {}
-
         return {name[(len(menu) + 6):]: item}

panels/menu.py

@@ -2,6 +2,8 @@ import logging
 
 import gi
 
+import json
+
 gi.require_version("Gtk", "3.0")
 from gi.repository import Gtk
 from jinja2 import Environment, Template
@@ -75,14 +77,29 @@ class MenuPanel(ScreenPanel):
 
             env = Environment(extensions=["jinja2.ext.i18n"], autoescape=True)
             env.install_gettext_translations(self._config.get_lang())
-            j2_temp = env.from_string(item['name'])
-            parsed_name = j2_temp.render()
 
-            b = self._gtk.Button(item['icon'], parsed_name, f"color{(i % 4) + 1}")
+            printer = self._printer.get_printer_status_data()
+
+            name = env.from_string(item['name']).render(printer)
+            icon = env.from_string(item['icon']).render(printer)
+            style = env.from_string(item['style']).render(printer) if item['style'] else None
+
+            b = self._gtk.Button(icon, name, (style if style else f"color{(i % 4) + 1}"))
+
             if item['panel'] is not None:
-                b.connect("clicked", self.menu_item_clicked, item['panel'], item)
+                panel = env.from_string(item['panel']).render(printer)
+                b.connect("clicked", self.menu_item_clicked, panel, item)
             elif item['method'] is not None:
-                params = item['params'] if item['params'] is not False else {}
+                params = {}
+
+                if item['params'] is not False:
+                    try:
+                        p = env.from_string(item['params']).render(printer)
+                        params = json.loads(p)
+                    except Exception as e:
+                        logging.exception(f"Unable to parse parameters for [{name}]:\n{e}")
+                        params = {}
+
                 if item['confirm'] is not None:
                     b.connect("clicked", self._screen._confirm_send_action, item['confirm'], item['method'], params)
                 else: