switch to type/request based JSON messages, improve GUI, add proper nickname dialog

client/dialog.py

@@ -0,0 +1,35 @@
+from PyQt5.QtWidgets import QDialog
+
+from client.nickname import Ui_NicknameDialog
+
+
+class NicknameDialog(QDialog, Ui_NicknameDialog):
+
+    def __init__(self, *args, **kwargs):
+        super(NicknameDialog, self).__init__(*args, **kwargs)
+        self.setupUi(self)
+
+        self.disabled = True
+        self.buttonBox.setDisabled(True)
+
+        self.setWindowTitle("Set Nickname")
+
+        self.lineEdit.returnPressed.connect(self.trySubmit)
+        self.lineEdit.textEdited.connect(self.controlSubmit)
+        self.show()
+
+    def controlSubmit(self):
+        """Updates whether or not the dialog box is allowed to proceed"""
+        if len(self.lineEdit.text()) > 2:
+            if self.disabled:
+                self.disabled = False
+                self.buttonBox.setDisabled(False)
+        else:
+            if not self.disabled:
+                self.disabled = True
+                self.buttonBox.setDisabled(True)
+
+    def trySubmit(self):
+        """Tries to submit the Dialog through the QLineEdit via Enter key"""
+        if not self.disabled:
+            self.accept()