IronForce is a decentralized network, Degeon is a messenger built on it
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from __future__ import annotations
import typing
from dataclasses import dataclass, field
import pygame
from config import WIDTH, HEIGHT, DARK_BLUE, WHITE, GREY, BLUE, font
@dataclass
class ChatSelector:
"""
The widget with the list of chats.
It's a dataclass, it should be initialized using the `from_chats` classmethod
Attributes:
chats (List[dc.Chat]): list of all chats, where each chat is a native Rust struct Chat
active_chat (int): the index of the current selected chat
hovered_chat (int or None): the index of the current hovered chat
width (int): the width of this widget
height (int): the height of this widget
chat_height (int): height of one chat
"""
chats: typing.List['dc.Chat'] = field(default_factory=list)
active_chat: int = 0
hovered_chat: typing.Optional[int] = None
width: int = WIDTH // 3
height: int = HEIGHT
chat_height: int = HEIGHT // 4
def render(self) -> pygame.Surface:
"""
Creates a pygame surface and draws the list of chats on it
:return: the surface with the chat selector
"""
surface: pygame.Surface = pygame.Surface((self.width, self.chat_height * len(self.chats)))
for i, chat in enumerate(self.chats):
bg_color, text_color = DARK_BLUE, WHITE
if i == self.hovered_chat:
bg_color = GREY
if i == self.active_chat:
bg_color = BLUE
title_surface: pygame.Surface = font.render(chat.profile.name, True, text_color)
pygame.draw.rect(surface, bg_color, (0, i * self.chat_height + 1, self.width, self.chat_height - 2))
surface.blit(title_surface, (i * self.chat_height + 10))
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
"""
if event.type == pygame.MOUSEBUTTONUP and event.pos[0] < self.width:
self.active_chat = event.pos[1] // self.chat_height
self.hovered_chat = None
if event.type == pygame.MOUSEMOTION:
if 0 < event.pos[0] < self.width \
and 0 < event.pos[1] < min(self.height, len(self.chats) * self.chat_height) - 2:
self.hovered_chat = event.pos[1] // self.chat_height
else:
self.hovered_chat = None
@classmethod
def from_chats(cls, chats: typing.List['dc.Chat'], **kwargs) -> ChatSelector:
return cls(chats, **kwargs)