file transfers and login screen fix

src/callbacks.py

@@ -194,11 +194,14 @@ def file_chunk_request(tox, friend_number, file_number, position, size, user_dat
     """
     Outgoing chunk
     """
-    invoke_in_main_thread(Profile.get_instance().outgoing_chunk,
+    if size:
-                          friend_number,
+        Profile.get_instance().outgoing_chunk(friend_number, file_number, position, size)
-                          file_number,
+    else:
-                          position,
+        invoke_in_main_thread(Profile.get_instance().outgoing_chunk,
-                          size)
+                              friend_number,
+                              file_number,
+                              position,
+                              size)
 
 
 def file_recv_control(tox, friend_number, file_number, file_control, user_data):

src/loginscreen.py

@@ -4,6 +4,19 @@ from PySide import QtCore, QtGui
 from widgets import *
 
 
+class NickEdit(QtGui.QPlainTextEdit):
+
+    def __init__(self, parent):
+        super(NickEdit, self).__init__(parent)
+        self.parent = parent
+
+    def keyPressEvent(self, event):
+        if event.key() == QtCore.Qt.Key_Return:
+            self.parent.create_profile()
+        else:
+            super(NickEdit, self).keyPressEvent(event)
+
+
 class LoginScreen(CenteredWidget):
 
     def __init__(self):
@@ -19,7 +32,7 @@ class LoginScreen(CenteredWidget):
         self.new_profile.clicked.connect(self.create_profile)
         self.label = QtGui.QLabel(self)
         self.label.setGeometry(QtCore.QRect(20, 70, 101, 17))
-        self.new_name = QtGui.QPlainTextEdit(self)
+        self.new_name = NickEdit(self)
         self.new_name.setGeometry(QtCore.QRect(20, 100, 171, 31))
         self.load_profile = QtGui.QPushButton(self)
         self.load_profile.setGeometry(QtCore.QRect(220, 150, 161, 27))