from __future__ import annotations import typing from dataclasses import dataclass, field import pygame from config import HEIGHT, WIDTH, CHAT_SELECTOR_WIDTH, DARKER_BLUE, CHAT_PREVIEW_HEIGHT, WHITE, font, DARK_BLUE, \ MESSAGE_HEIGHT import degeon_core as dc from input_field import TextField from message import Message @dataclass class ActiveChat: """ The widget with the current chat Attributes: :param chat (dc.Chat): the chat (Rust Chat type) :param height (int): the height of the active chat widget :param width (int): its width :param delta_x (int): distance from the left edge of the application to the left edge of the screen :param header_height (int): height of the header (the title) """ chat: dc.Chat input_field: TextField = field(default_factory=lambda: TextField()) height: int = HEIGHT width: int = WIDTH - CHAT_SELECTOR_WIDTH - 10 delta_x: int = CHAT_SELECTOR_WIDTH + 10 header_height: int = int(CHAT_PREVIEW_HEIGHT * 1.5) @classmethod def new(cls, chat: dc.Chat, **kwargs) -> ActiveChat: """ Create a new `Chat` from a rust Chat object :param chat: rusty chat :param kwargs: optional other paraeters :return: the `Chat` """ return cls(chat=chat, **kwargs) def get_messages(self) -> typing.Iterable[Message]: """ Get an iterator over all messages in this chat in the backwards order This function creates a python `message.Message` object from rust instances :return: an iterator of `message.Message` objects """ for msg in reversed(self.chat.messages): yield Message(text=msg.get_content_py().text, is_from_me=False) def get_header(self) -> pygame.Surface: """ Render a pygame surface with the header. The header is (for now) just a name of the user written on a background :return: the header """ surface: pygame.Surface = pygame.Surface((self.width, self.header_height)) surface.fill(DARK_BLUE) name_surface: pygame.Surface = font.render(self.chat.profile.name, True, WHITE) surface.blit(name_surface, (20, 20)) return surface def render(self) -> pygame.Surface: """ Creates a pygame surface and draws the chat on it :return: the surface with the chat on it """ surface: pygame.Surface = pygame.Surface((self.width, self.height)) surface.fill(DARKER_BLUE) # Render messages # This is the y0 for the last message last_message_y = self.height - MESSAGE_HEIGHT * 2 for i, message in zip(range(30), self.get_messages()): msg_surface = message.render() surface.blit(msg_surface, (0, last_message_y - (MESSAGE_HEIGHT + 30) * (i + 1))) # Render header header = self.get_header() surface.blit(header, (0, 10)) # Render message input input_field_surface: pygame.Surface = self.input_field.render() surface.blit(input_field_surface, (0, self.height - input_field_surface.get_height())) return surface def process_event(self, event: pygame.event.Event): """ Process a click: select the necessary chat if this click is in the widget :param event: a pygame event """ self.input_field.process_event(event)