import logging import tkinter as tk from tkinter import ttk from typing import TYPE_CHECKING, Iterable import grpc from core.api.grpc import core_pb2 from core.gui.dialogs.dialog import Dialog from core.gui.errors import show_grpc_error from core.gui.images import ImageEnum, Images from core.gui.task import BackgroundTask from core.gui.themes import PADX, PADY if TYPE_CHECKING: from core.gui.app import Application class SessionsDialog(Dialog): def __init__( self, master: "Application", app: "Application", is_start_app: bool = False ): super().__init__(master, app, "Sessions", modal=True) self.is_start_app = is_start_app self.selected = False self.selected_id = None self.tree = None self.has_error = False self.sessions = self.get_sessions() if not self.has_error: self.draw() def get_sessions(self) -> Iterable[core_pb2.SessionSummary]: try: response = self.app.core.client.get_sessions() logging.info("sessions: %s", response) return response.sessions except grpc.RpcError as e: show_grpc_error(e, self.app, self.app) self.has_error = True self.destroy() def draw(self): self.top.columnconfigure(0, weight=1) self.top.rowconfigure(1, weight=1) self.draw_description() self.draw_tree() self.draw_buttons() def draw_description(self): """ write a short description """ label = ttk.Label( self.top, text="Below is a list of active CORE sessions. Double-click to \n" "connect to an existing session. Usually, only sessions in \n" "the RUNTIME state persist in the daemon, except for the \n" "one you might be concurrently editting.", justify=tk.CENTER, ) label.grid(pady=PADY) def draw_tree(self): frame = ttk.Frame(self.top) frame.columnconfigure(0, weight=1) frame.rowconfigure(0, weight=1) frame.grid(sticky="nsew", pady=PADY) self.tree = ttk.Treeview( frame, columns=("id", "state", "nodes"), show="headings" ) self.tree.grid(sticky="nsew") self.tree.column("id", stretch=tk.YES) self.tree.heading("id", text="ID") self.tree.column("state", stretch=tk.YES) self.tree.heading("state", text="State") self.tree.column("nodes", stretch=tk.YES) self.tree.heading("nodes", text="Node Count") for index, session in enumerate(self.sessions): state_name = core_pb2.SessionState.Enum.Name(session.state) self.tree.insert( "", tk.END, text=str(session.id), values=(session.id, state_name, session.nodes), ) self.tree.bind("", self.on_selected) self.tree.bind("<>", self.click_select) yscrollbar = ttk.Scrollbar(frame, orient="vertical", command=self.tree.yview) yscrollbar.grid(row=0, column=1, sticky="ns") self.tree.configure(yscrollcommand=yscrollbar.set) xscrollbar = ttk.Scrollbar(frame, orient="horizontal", command=self.tree.xview) xscrollbar.grid(row=1, sticky="ew") self.tree.configure(xscrollcommand=xscrollbar.set) def draw_buttons(self): frame = ttk.Frame(self.top) for i in range(5): frame.columnconfigure(i, weight=1) frame.grid(sticky="ew") image = Images.get(ImageEnum.DOCUMENTNEW, 16) b = ttk.Button( frame, image=image, text="New", compound=tk.LEFT, command=self.click_new ) b.image = image b.grid(row=0, padx=PADX, sticky="ew") image = Images.get(ImageEnum.FILEOPEN, 16) b = ttk.Button( frame, image=image, text="Connect", compound=tk.LEFT, command=self.click_connect, ) b.image = image b.grid(row=0, column=1, padx=PADX, sticky="ew") image = Images.get(ImageEnum.SHUTDOWN, 16) b = ttk.Button( frame, image=image, text="Shutdown", compound=tk.LEFT, command=self.click_shutdown, ) b.image = image b.grid(row=0, column=2, padx=PADX, sticky="ew") image = Images.get(ImageEnum.DELETE, 16) b = ttk.Button( frame, image=image, text="Delete", compound=tk.LEFT, command=self.click_delete, ) b.image = image b.grid(row=0, column=3, padx=PADX, sticky="ew") image = Images.get(ImageEnum.CANCEL, 16) if self.is_start_app: b = ttk.Button( frame, image=image, text="Exit", compound=tk.LEFT, command=self.destroy ) else: b = ttk.Button( frame, image=image, text="Cancel", compound=tk.LEFT, command=self.destroy, ) b.image = image b.grid(row=0, column=4, sticky="ew") def click_new(self): self.app.core.create_new_session() self.destroy() def click_select(self, event: tk.Event): item = self.tree.selection() session_id = int(self.tree.item(item, "text")) self.selected = True self.selected_id = session_id def click_connect(self): """ if no session is selected yet, create a new one else join that session """ if self.selected and self.selected_id is not None: self.join_session(self.selected_id) elif not self.selected and self.selected_id is None: self.click_new() else: logging.error("sessions invalid state") def click_shutdown(self): """ if no session is currently selected create a new session else shut the selected session down. """ if self.selected and self.selected_id is not None: self.shutdown_session(self.selected_id) elif not self.selected and self.selected_id is None: self.click_new() else: logging.error("querysessiondrawing.py invalid state") def join_session(self, session_id: int): if self.app.core.xml_file: self.app.core.xml_file = None self.app.statusbar.progress_bar.start(5) task = BackgroundTask(self.app, self.app.core.join_session, args=(session_id,)) task.start() self.destroy() def on_selected(self, event: tk.Event): item = self.tree.selection() sid = int(self.tree.item(item, "text")) self.join_session(sid) def shutdown_session(self, sid: int): self.app.core.stop_session(sid) self.click_new() self.destroy() def click_delete(self): logging.debug("Click delete") item = self.tree.selection() if item: sid = int(self.tree.item(item, "text")) self.app.core.delete_session(sid, self.top) self.tree.delete(item[0]) if sid == self.app.core.session_id: self.click_new() selections = self.tree.get_children() if selections: self.tree.focus(selections[0]) self.tree.selection_set(selections[0])