selection_menu.py

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import numpy as np
 
from textual.widgets import Static, Tree
from textual.widgets.tree import TreeNode
from daqconf.cider.widgets.configuration_controller import ConfigurationController
 
class SelectionMenu(Static):
    '''
    Basic selection menu, builds tree from selection objects
    '''
    _tree = None
    __node_states = {}
    
    def compose(self):            
        self._build_tree()
        yield self._tree
    
    def _build_tree(self):
        """Iteratively builds tree via dictionary. This should be generated in SelectionInterface"""
 
        # Grab current tree + config controller
        if self._tree is not None:
            self._tree.clear()
    
        self._tree = Tree("Configuration:")
        main_screen = self.app.get_screen("main")
        self._controller = main_screen.query_one("ConfigurationController")
 
        # Loop over interfaces + make sure they're up to date with config
        for key, interface in self._controller.get_interface().items():
            interface.recompose()
 
        # Check if the current interface is in the controller
        if self.id not in self._controller.get_interface().keys():
            raise ValueError(f"Cannot find {self._interface_label} in controller. \n  \
                             available interfaces are {self._controller.get_interface()}")
 
        # Grab root of tree        
        tree_root = self._tree.root
        tree_root.expand()
        
        # Sort out the tree nodes to be alphabetical + loop overtop level noes  
        for key, branch in sorted(self._controller.get_interface()[self.id].relationships.items()):
            tree_node = tree_root.add(f"[green]{key}[/green]", expand=False)
            if  self.__node_states.get(tree_node.id):
                tree_node.expand()
                
            self.__build_tree_node(tree_node, branch, is_disabled=False, disabled_elements=[])
        
 
    def __build_tree_node(self, input_node: TreeNode, input_list: list, is_disabled: bool=False, disabled_elements: list=[]):
        """Recursively build tree nodes from a list of dictionaries"""
        
        # Check if we need to remove the node since it's empty
        if len(input_list)==0:
            input_node.remove()
 
        # Loop over the input list
        for config_item in input_list:
            # Check if it has sub-levels
            if isinstance(config_item, dict):
                # Print the DAL name
                config_key = list(config_item.keys())[0]
                config_objects = list(config_item.values())[0]
 
                # Need to be able to add categories so check if it's just a string
                if isinstance(config_key, str):
                    item_disabled = is_disabled
                    dal_str = config_key
                    stored_data=None #
 
                else: 
                    if config_key.className() == "Session":
                        disabled_elements = config_key.disabled
                        # Remove the Resource object since it just doubly defines disabled items
                
                    # Check if the item is disabled
                    item_disabled = self.__check_item_disabled(config_key, disabled_elements) or is_disabled
                    
                    dal_str = self._controller.generate_rich_string(config_key, item_disabled)
                    stored_data = config_key
                
                # Bit confusing, set ensure we're not multiply defining things in the tree,
                # for example disabled items in a session may also be defined elsewhere
                tree_node = input_node.add(dal_str, data=stored_data)
                if self.__node_states.get(tree_node.id):
                    tree_node.expand()
 
                self.__build_tree_node(tree_node, config_objects, item_disabled, disabled_elements)
                                
            else:
                # No sub-levels, just add the leaf
                item_disabled = self.__check_item_disabled(config_item, disabled_elements) or is_disabled
                input_node.add_leaf(self._controller.generate_rich_string(config_item, item_disabled), data=config_item)
 
    def on_tree_node_selected(self, event):
        # Selector
        controller:ConfigurationController = self.app.query_one("ConfigurationController")
        
        if event.node.data is not None: 
            controller.current_dal = event.node.data
    
        self.__node_states[event.node.id] = event.node.is_expanded
    
    def __check_item_disabled(self, item, disabled_elements):
        """Check if an item is disabled [currently unecessary extra method but may be useful in extended version]"""
        return item in disabled_elements
    
    # Cache the tree state?