fix QTextEdit not clearing properly, use minimum contrast in initial client color selection, MINIMUM_CONTRAST constant

client/gui.py

@@ -108,6 +108,7 @@ class MainWindow(QMainWindow, Ui_MainWindow):
                 cursor = self.messageBox.textCursor()
                 cursor.setPosition(0)
                 self.messageBox.setTextCursor(cursor)
+                return True
         return super().eventFilter(obj, event)
 
     def addMessage(self, nickname: str, message: str, color: str, time: int) -> None:

constants.py

@@ -3,6 +3,7 @@ from typing import List
 import webcolors
 
 HEADER_LENGTH = 10
+MINIMUM_CONTRAST = 4.65
 
 
 class Types:

server/commands.py

@@ -70,7 +70,7 @@ class CommandHandler:
                 logger.error(f'Could not process client {self.client.nickname}\'s command request.', exc_info=e)
                 return 'A fatal error occurred while trying to process this command.'
 
-    def reroll(self, minimum_contrast: float = 4.65) -> str:
+    def reroll(self, minimum_contrast: float = constants.MINIMUM_CONTRAST) -> str:
         """
         Randomly change the client's color to a different color.
         """

server/handler.py

@@ -26,7 +26,7 @@ class Client:
 
         self.id = str(uuid.uuid4())
         self.nickname = self.id[:8]
-        self.color = random.choice(constants.Colors.ALL)
+        self.color = random.choice(constants.Colors.has_contrast(float(constants.MINIMUM_CONTRAST)))
 
         self.command = CommandHandler(self)
         self.first_seen = time.time()